{"id":6017,"date":"2026-05-21T07:25:48","date_gmt":"2026-05-21T15:25:48","guid":{"rendered":"https:\/\/haifengmachine.com\/?p=6017"},"modified":"2026-05-25T23:12:22","modified_gmt":"2026-05-26T07:12:22","slug":"pu-shoe-sole-defects-release-agents-troubleshooting","status":"publish","type":"post","link":"https:\/\/haifengmachine.com\/ru\/pu-shoe-sole-defects-release-agents-troubleshooting\/","title":{"rendered":"PU Shoe Sole Defects: Troubleshooting Release Agents &amp; Workshop Chemicals [Part 3: Workshop Chemicals]"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"6017\" class=\"elementor elementor-6017\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a647234 e-flex e-con-boxed e-con e-parent\" data-id=\"a647234\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8da0086 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"8da0086\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;bullets&quot;,&quot;icon&quot;:{&quot;value&quot;:&quot;fas fa-dot-circle&quot;,&quot;library&quot;:&quot;fa-solid&quot;,&quot;rendered_tag&quot;:&quot;&lt;svg class=\\&quot;e-font-icon-svg e-fas-dot-circle\\&quot; viewBox=\\&quot;0 0 512 512\\&quot; xmlns=\\&quot;http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\&quot;&gt;&lt;path d=\\&quot;M256 8C119.033 8 8 119.033 8 256s111.033 248 248 248 248-111.033 248-248S392.967 8 256 8zm80 248c0 44.112-35.888 80-80 80s-80-35.888-80-80 35.888-80 80-80 80 35.888 80 80z\\&quot;&gt;&lt;\\\/path&gt;&lt;\\\/svg&gt;&quot;},&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;,&quot;h6&quot;],&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__8da0086\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__8da0086\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t<div id=\"elementor-toc__8da0086\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-484fe95 e-flex e-con-boxed e-con e-parent\" data-id=\"484fe95\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3ca3daa elementor-widget elementor-widget-heading\" data-id=\"3ca3daa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why do perfectly calculated A\/B polyurethane ratios still result in shoe soles covered in blisters and surface pitting? <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-21fcad3 elementor-widget elementor-widget-text-editor\" data-id=\"21fcad3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Perfect A\/B chemical ratios mean nothing if your PU shoe soles come out of the mold covered in blisters and surface pitting. Workshop chemicals\u2014specifically mold release agents and mixhead flushing solvents\u2014are the hidden yield killers in PU casting. This Haifeng engineering guide tackles real floor-level problems: why water-based release agents demand a strict 45-55\u00b0C mold temperature, how 60\u00b0C warm-water flushing is replacing toxic Methylene Chloride, and why failing to let soles rest for 24 hours (post-curing) will cause you to fail international flex tests. Stop blaming raw materials and fix your SOPs.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-13c6f51 elementor-widget elementor-widget-image\" data-id=\"13c6f51\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"501\" src=\"https:\/\/haifengmachine.com\/wp-content\/uploads\/2026\/05\/Polyurethane-shoes-soles-haifeng-1-1024x641.jpg\" class=\"attachment-large size-large wp-image-6046\" alt=\"Polyurethane shoes soles haifeng\" srcset=\"https:\/\/haifengmachine.com\/wp-content\/uploads\/2026\/05\/Polyurethane-shoes-soles-haifeng-1-1024x641.jpg 1024w, https:\/\/haifengmachine.com\/wp-content\/uploads\/2026\/05\/Polyurethane-shoes-soles-haifeng-1-300x188.jpg 300w, https:\/\/haifengmachine.com\/wp-content\/uploads\/2026\/05\/Polyurethane-shoes-soles-haifeng-1-768x481.jpg 768w, https:\/\/haifengmachine.com\/wp-content\/uploads\/2026\/05\/Polyurethane-shoes-soles-haifeng-1-18x12.jpg 18w, https:\/\/haifengmachine.com\/wp-content\/uploads\/2026\/05\/Polyurethane-shoes-soles-haifeng-1.jpg 1280w\" sizes=\"(max-width: 800px) 100vw, 800px\" title=\"\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90683dd elementor-widget elementor-widget-heading\" data-id=\"90683dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">1. Introduction: <span style=\"font-size: 1.3rem\">The \"Last Mile\" of the Yield Rate Battle<\/span><span style=\"font-size: 1.3rem\"><\/span><br><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4be6cf elementor-widget elementor-widget-text-editor\" data-id=\"b4be6cf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>In Part 2 of this series, we locked down your volumetric math and completely eliminated dispensing errors using <a href=\"https:\/\/haifengmachine.com\/pu-shoe-sole-manufacturing-cup-test-foaming\/\">closed-loop algorithms<\/a>. But out on the workshop floor, there is a brutal reality: you can buy the best raw materials in the world, but if the operator messes up the mold release agent, the shoe soles will look like garbage\u2014riddled with pinholes and flaky skin.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e40690b elementor-widget elementor-widget-heading\" data-id=\"e40690b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1.1 What went wrong?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-13107d7 elementor-widget elementor-widget-text-editor\" data-id=\"13107d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Most factory owners spend 90% of their time agonizing over polyurethane formulations, completely ignoring the remaining 10%: the auxiliary chemicals. The premium texture of a high-end PU sole relies heavily on how you handle release agents and mixhead solvents. High yield rates aren&#8217;t about luck. They come from rigid shop floor discipline, strict thermal control, and engineering out the variables in the &#8220;last mile&#8221; of production.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c82f7e5 elementor-widget elementor-widget-heading\" data-id=\"c82f7e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">2. \"Blisters\" and \"Pitting\": Stop Blaming the Polyol<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4524d7a elementor-widget elementor-widget-text-editor\" data-id=\"4524d7a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"21\">The usual reaction to a bad batch of blistered soles is to immediately call the chemical supplier and complain about bad raw materials. 99% of the time, the raw PU liquid is fine. Surface defects are usually a process failure happening right under your nose.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11bdda4 elementor-widget elementor-widget-text-editor\" data-id=\"11bdda4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><strong>The Release Agent Trap:<\/strong> Blisters happen when operators spray too much release agent, or when that agent contains moisture. When liquid PU hits a puddle of unevaporated solvent, a localized gas reaction blows a hole right in the surface of your shoe sole. The fix? Write a strict Standard Operating Procedure (SOP) that limits exact spray times.<\/li><li><strong>Choked Air Vents:<\/strong> Modern CNC footwear molds have microscopic air vents. If your maintenance crew lets &#8220;dead&#8221; PU residue clog those vents, the displaced air inside the cavity has nowhere to go. It gets trapped, causing massive surface voids.<\/li><li><strong>Mixhead Spit:<\/strong> The dynamic mixing head needs mandatory maintenance every two hours. If it&#8217;s not clean, semi-cured chemical chunks get injected into your next shot, ruining the mold.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2d72a9b elementor-widget elementor-widget-heading\" data-id=\"2d72a9b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">3. The Solvent Red Sea: Cheap Toxins vs. ESG Compliance<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d196acb elementor-widget elementor-widget-text-editor\" data-id=\"d196acb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Mold release agents stop the PU from permanently gluing itself to the steel. Cleaning solvents dissolve the cured residue. What you use here dictates who will actually buy your shoes.<\/p><p>Walk into a low-margin shop today, and you&#8217;ll smell it immediately: <strong>Methylene Chloride (MC)<\/strong> and <strong>Dimethylformamide (DMF)<\/strong>. They use these because they evaporate fast and clean aggressively. But they are highly toxic, they eat away at expensive CNC mold textures, and they will fail every modern ESG audit from Western buyers.<\/p><p>If you want OEM contracts from Tier-1 brands like Nike or Adidas, you have to transition to <strong>Water-Based Release Agents<\/strong>. The catch? Water evaporates much slower than MC. To use water-based agents without causing the blisters we just talked about, you have to keep your molds hotter (between 45-55\u00b0C) to flash off the water before pouring. It takes more energy, but it&#8217;s the only way to play in the big leagues.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4175f02 elementor-widget elementor-widget-heading\" data-id=\"4175f02\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">4.Ditching Toxic Mixhead Solvents<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0e36074 elementor-widget elementor-widget-text-editor\" data-id=\"0e36074\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>For decades, cleaning the mixhead meant flushing it with Methylene Chloride and blasting it with air. The problem is that if even a few drops of MC stay inside the mixing chamber, they drip into the next mold. That single drip destroys the chemical cross-linking of that specific shoe sole, causing giant soft spots.<\/p><p>At Haifeng, we engineered toxic solvents completely out of this step. Our 2026 casting\/pouring machines run an <strong>Air-Blow &amp; Warm-Water Wash System<\/strong>. By using high-pressure compressed air mixed with<strong> 60\u00b0C heated water<\/strong> (kept just safe enough to prevent operator burns), we scour the mixing chamber clean. Zero toxic residue. Zero chemical interference with your next PU shot.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a2dbe22 elementor-widget elementor-widget-heading\" data-id=\"a2dbe22\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">5. Thermal Balance and the 24-Hour Trap<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-95c7865 elementor-widget elementor-widget-text-editor\" data-id=\"95c7865\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Polyurethane is an exothermic reaction. It lives and dies by temperature.<\/p><ul><li><strong>The 45-55\u00b0C Rule<\/strong>: Ever wonder why the first dozen soles produced on a Monday morning go straight into the trash? It\u2019s because the molds are faking it. The surface might feel warm, but the heavy steel core is still cold. Molds need to be pre-heated for hours to reach a uniform 45-55\u00b0C. If you pour 40\u00b0C liquid PU into a cold mold, the metal sucks the reaction heat right out of the chemical, leaving you with terrible surface skinning.<\/li><li><strong>The 24-Hour Post-Curing Trap:<\/strong> A PU sole is solid enough to pull from the mold in 5 to 7 minutes. But it is *not* finished reacting. <br \/>We had a client pull a batch of PU direct-injection shoes and immediately send them to the lab. They failed the flexing tests miserably. The factory panicked. We told them to leave the shoes alone and test the exact same batch the next day. After sitting for 24 hours, they passed every benchmark easily.<\/li><\/ul><p>Never test, trim, or paint a freshly demolded sole. They need a <strong>24-hour Post-Curing rest at room temperature<\/strong> for the internal macromolecular cross-linking to actually finish.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-99979db elementor-widget elementor-widget-heading\" data-id=\"99979db\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">6. Troubleshooting Cheat Sheet<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cdfa231 elementor-widget elementor-widget-text-editor\" data-id=\"cdfa231\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Tape this to your shop floor wall. When things go wrong, check this matrix before you stop the line:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9a90b9d elementor-widget elementor-widget-shortcode\" data-id=\"9a90b9d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><div class=\"wptb-table-container wptb-table-6045\"><div class=\"wptb-table-container-matrix\" id=\"wptb-table-id-6045\" data-wptb-version=\"2.0.20\" data-wptb-pro-status=\"false\"><table class=\"wptb-preview-table wptb-element-main-table_setting-6045\" style=\"border-spacing: 3px 3px; border-collapse: collapse !important; min-width: 426px; border: 1px solid #000000; \" data-border-spacing-columns=\"3\" data-border-spacing-rows=\"3\" data-reconstraction=\"1\" data-wptb-table-directives=\"eyJpbm5lckJvcmRlcnMiOnsiYWN0aXZlIjoiYWxsIiwiYm9yZGVyV2lkdGgiOjEsImJvcmRlclJhZGl1c2VzIjp7ImFsbCI6MCwicm93IjowLCJjb2x1bW4iOjB9fX0=\" data-wptb-responsive-directives=\"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\" data-wptb-cells-width-auto-count=\"3\" data-wptb-extra-styles=\"\" data-wptb-pro-pagination-top-row-header=\"false\" data-wptb-rows-per-page=\"10\" data-wptb-pro-search-top-row-header=\"false\" data-wptb-searchbar-position=\"left\" role=\"table\" data-table-columns=\"3\" data-wptb-table-alignment=\"center\" data-wptb-td-width-auto=\"120\" data-wptb-table-tds-sum-max-width=\"426\"><tbody data-global-font-size=\"15\"><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"0\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-597\" style=\"\"><div style=\"position: relative;\"><p>Phenomenon (Defect)<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"0\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-598\" style=\"\"><div style=\"position: relative;\"><p>Root Cause<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"0\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-599\" style=\"\"><div style=\"position: relative;\"><p>Haifeng Solution \/ SOP<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"1\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-600\" style=\"\"><div style=\"position: relative;\"><p>Component B (Iso) hard to melt or cloudy<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"1\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-601\" style=\"\"><div style=\"position: relative;\"><p>1. Insufficient oven heating.<\/p><p>2. Resin reacted with water.<\/p><p>3. Resin expired.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"1\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-602\" style=\"\"><div style=\"position: relative;\"><p>1. Use 50-70&deg;C constant-temp oven.<\/p><p>2. Replace the crystallized resin.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"2\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-603\" style=\"\"><div style=\"position: relative;\"><p>Component B (Iso) cloudy &amp; viscosity spiked<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"2\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-604\" style=\"\"><div style=\"position: relative;\"><p>1. Moisture in compressed air.<\/p><p>2. Micro-leaks in the material tank.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"2\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-605\" style=\"\"><div style=\"position: relative;\"><p>1. Install\/check industrial air dryer.<\/p><p>2. Inspect and repair tank seals.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"3\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-606\" style=\"\"><div style=\"position: relative;\"><p>Raw material foams too SLOWLY<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"3\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-607\" style=\"\"><div style=\"position: relative;\"><p>1. Insufficient Catalyst (Component C).<\/p><p>2. Polyol (A-material) temperature too low.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"3\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-608\" style=\"\"><div style=\"position: relative;\"><p>1. Precisely increase catalyst dosage.<\/p><p>2. Raise tank heating jacket temp.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"4\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-609\" style=\"\"><div style=\"position: relative;\"><p>Raw material foams too FAST<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"4\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-610\" style=\"\"><div style=\"position: relative;\"><p>1. Insufficient release agent.<\/p><p>2. Water\/impurities in release agent.<\/p><p>3. Wrong type of release agent used.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"4\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-611\" style=\"\"><div style=\"position: relative;\"><p>1. Standardize spraying SOP.<\/p><p>2. Switch to Haifeng-approved agents.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"5\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-612\" style=\"\"><div style=\"position: relative;\"><p>Low overall sole hardness<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"5\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-613\" style=\"\"><div style=\"position: relative;\"><p>1. Catalyst failure in Polyol.<\/p><p>2. Incorrect A\/B ratio.<\/p><p>3. Insufficient dispensing volume.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"5\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-614\" style=\"\"><div style=\"position: relative;\"><p>1. Replace Polyol component.<\/p><p>2. Recalibrate ratio.<\/p><p>3. Increase dispensing volume.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"6\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-615\" style=\"\"><div style=\"position: relative;\"><p>Material shortage (Incomplete Fill)<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"6\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-616\" style=\"\"><div style=\"position: relative;\"><p>1. Insufficient dispensing volume.<\/p><p>2. Trapped air inside the mold.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"6\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-617\" style=\"\"><div style=\"position: relative;\"><p>1. Increase dispensing volume.<\/p><p>2. Open air vents \/ adjust mold tilt.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"7\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-618\" style=\"\"><div style=\"position: relative;\"><p>Shoe sole shrinks or deforms<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"7\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-619\" style=\"\"><div style=\"position: relative;\"><p>1. Insufficient dispensing volume.<\/p><p>2. Incorrect A\/B ratio (weak structure).<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"7\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-620\" style=\"\"><div style=\"position: relative;\"><p>1. Increase dispensing volume.<\/p><p>2. Recalibrate A\/B ratio.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"8\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-621\" style=\"\"><div style=\"position: relative;\"><p>Soles crack during demolding<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"8\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-622\" style=\"\"><div style=\"position: relative;\"><p>1. Demolding too early (insufficient cure).<\/p><p>2. Lack of catalyst.<\/p><p>3. Incorrect A\/B ratio.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"8\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-623\" style=\"\"><div style=\"position: relative;\"><p>1. Extend in-mold curing timer.<\/p><p>2. Increase catalyst dosage.<\/p><p>3. Adjust A\/B ratio.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"9\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-624\" style=\"\"><div style=\"position: relative;\"><p>Massive water blisters inside sole<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"9\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-625\" style=\"\"><div style=\"position: relative;\"><p>1. Cleaning solvent\/water leaked in.<\/p><p>2. Mixhead valves leaking air.<\/p><p>3. Dispensing gear pump pulsating.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"9\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-626\" style=\"\"><div style=\"position: relative;\"><p>1. Check water-wash nozzle seals.<\/p><p>2. Replace mixhead seals.<\/p><p>3. Inspect servo motors &amp; pumps.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"10\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-627\" style=\"\"><div style=\"position: relative;\"><p>Surface layer partially peeling<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"10\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-628\" style=\"\"><div style=\"position: relative;\"><p>1. Mold temperature is too low.<\/p><p>2. Uneven dispensing distribution.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"10\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-629\" style=\"\"><div style=\"position: relative;\"><p>1. Preheat mold strictly to 45-55&deg;C.<\/p><p>2. Adjust pouring pattern\/trajectory.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"11\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-630\" style=\"\"><div style=\"position: relative;\"><p>Soles expand\/swell after demolding<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"11\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-631\" style=\"\"><div style=\"position: relative;\"><p>1. Short curing time.<\/p><p>2. Excessive dispensing volume.<\/p><p>3. Wet wooden core (if applicable).<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"11\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-632\" style=\"\"><div style=\"position: relative;\"><p>1. Extend curing time.<\/p><p>2. Reduce dispensing volume.<\/p><p>3. Thoroughly dry inserts\/cores.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"12\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-633\" style=\"\"><div style=\"position: relative;\"><p>Skin thick and hard (Semi-rigid)<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"12\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-634\" style=\"\"><div style=\"position: relative;\"><p>1. Mold temperature too low.<\/p><p>2. Material over-packing (too much volume).<\/p><p>3. Insufficient blowing agent.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"12\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-635\" style=\"\"><div style=\"position: relative;\"><p>1. Raise mold temp to 50&deg;C.<\/p><p>2. Reduce dispensing volume.<\/p><p>3. Adjust blowing agent ratio.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"13\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-636\" style=\"\"><div style=\"position: relative;\"><p>Skin thick with surface pores<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"13\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-637\" style=\"\"><div style=\"position: relative;\"><p>1. High moisture content in raw materials.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"13\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-638\" style=\"\"><div style=\"position: relative;\"><p>1. Check Polyol moisture &amp; air dryer.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"14\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-639\" style=\"\"><div style=\"position: relative;\"><p>Skin thin, peeling, and weak<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"14\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-640\" style=\"\"><div style=\"position: relative;\"><p>1. Mold temperature is too high.<\/p><p>2. Lack of catalyst or chain extender.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"14\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-641\" style=\"\"><div style=\"position: relative;\"><p>1. Lower mold heating temperature.<\/p><p>2. Increase catalyst\/extender.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"15\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-642\" style=\"\"><div style=\"position: relative;\"><p>Large, regular voids on surface<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"15\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-643\" style=\"\"><div style=\"position: relative;\"><p>1. Mold air vents are blocked.<\/p><p>2. Insufficient dispensing volume.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"15\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-644\" style=\"\"><div style=\"position: relative;\"><p>1. Unclog\/drill new air vents.<\/p><p>2. Increase dispensing volume.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"16\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-645\" style=\"\"><div style=\"position: relative;\"><p>Pin-hole streaks on the surface<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"16\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-646\" style=\"\"><div style=\"position: relative;\"><p>1. Air mixed in raw material lines.<\/p><p>2. Dirty mixing chamber.<\/p><p>3. Unsynchronized A\/B injection (lead\/lag).<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"16\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-647\" style=\"\"><div style=\"position: relative;\"><p>1. Fix system air leaks.<\/p><p>2. Deep clean the mixing head.<\/p><p>3. Synchronize valve timing.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"17\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-648\" style=\"\"><div style=\"position: relative;\"><p>Surface bulging (Blisters)<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"17\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-649\" style=\"\"><div style=\"position: relative;\"><p>1. Gel rate too fast.<\/p><p>2. Mold temperature too high.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"17\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-650\" style=\"\"><div style=\"position: relative;\"><p>1. Reduce tin catalyst dosage.<\/p><p>2. Lower the mold temperature.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"18\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-651\" style=\"\"><div style=\"position: relative;\"><p>Product shrinkage (Post-cure)<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"18\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-652\" style=\"\"><div style=\"position: relative;\"><p>1. NCO\/OH ratio is too high.<\/p><p>2. Closed-cell rate too high.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"18\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-653\" style=\"\"><div style=\"position: relative;\"><p>1. Reduce Iso (B-material) volume.<\/p><p>2. Reduce catalyst dosage.<\/p><\/div><\/div><\/td><\/tr><tr class=\"wptb-row \" style=\"\"><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"19\" data-x-index=\"0\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-654\" style=\"\"><div style=\"position: relative;\"><p>Product feels abnormally soft<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"19\" data-x-index=\"1\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-655\" style=\"\"><div style=\"position: relative;\"><p>1. NCO\/OH ratio is too low.<\/p><p>2. Incorrect catalyst dosage.<\/p><\/div><\/div><\/td><td class=\"wptb-cell \" colspan=\"1\" rowspan=\"1\" style=\"padding: 10px; border-width: 1px; border-color: #000000; border-style: solid; \" data-y-index=\"19\" data-x-index=\"2\" data-wptb-css-td-auto-width=\"true\" data-wptb-css-td-auto-height=\"true\" data-wptb-cell-vertical-alignment=\"center\"><div class=\"wptb-text-container wptb-ph-element wptb-element-text-656\" style=\"\"><div style=\"position: relative;\"><p>1. Increase Iso (B-material) volume.<\/p><p>2. Verify catalyst measurements.<\/p><\/div><\/div><\/td><\/tr><\/tbody><\/table><\/div><\/div>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c2149ac elementor-widget elementor-widget-heading\" data-id=\"c2149ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">7. Engineer Out the Human Error<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-721b1da elementor-widget elementor-widget-text-editor\" data-id=\"721b1da\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The gap between a factory barely breaking even and a Tier-1 OEM supplier is variable control.<\/p><p>When you upgrade to Haifeng\u2019s 60\u00b0C water-wash mixing heads, enforce strict thermal parameters, switch to ESG-compliant release agents, and respect the 24-hour post-curing rule, you engineer &#8220;human error&#8221; off your floor. You stop relying on a foreman&#8217;s gut feeling to fix blisters, and start relying on mechanical systems to guarantee a 98%+ yield.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6721e39 elementor-widget elementor-widget-heading\" data-id=\"6721e39\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3016083 elementor-widget elementor-widget-text-editor\" data-id=\"3016083\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The gap between a factory barely breaking even and a Tier-1 OEM supplier is variable control.<\/p><p>When you upgrade to Haifeng\u2019s 60\u00b0C water-wash mixing heads, enforce strict thermal parameters, switch to ESG-compliant release agents, and respect the 24-hour post-curing rule, you engineer &#8220;human error&#8221; off your floor. You stop relying on a foreman&#8217;s gut feeling to fix blisters, and start relying on mechanical systems to guarantee a 98%+ yield.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e55cd54 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"e55cd54\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c0794e4 elementor-widget elementor-widget-text-editor\" data-id=\"c0794e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>[If you need to get toxic solvents off your shop floor, upgrade to water-wash PU casting systems, or want a complete EPC+M+O turnkey factory blueprint, contact the Haifeng Engineering Team today for a custom ROI calculation.]<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0ac9fc elementor-widget elementor-widget-heading\" data-id=\"b0ac9fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The Ultimate EPC+M+O Guide to PU Shoe Sole Manufacturing:<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ef265c6 elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"ef265c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/haifengmachine.com\/pu-shoe-sole-formulation-raw-materials-guide\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"> [Part 1: Materials &amp; Chemistry]<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/haifengmachine.com\/pu-shoe-sole-manufacturing-cup-test-foaming\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">[Part 2: Practical Processing]<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/haifengmachine.com\/pu-shoe-sole-defects-release-agents-troubleshooting\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"> [Part 3: Workshop Chemicals]<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/haifengmachine.com\/pu-casting-machine-mechanics-pumps-pressure\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"> [Part 4: Mechanics &amp; Fluid Dynamics]<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/haifengmachine.com\/pu-shoe-factory-layout-automation-turnkey-lines\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"> [Part 5: Factory Layout]<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e1c91ab elementor-widget elementor-widget-heading\" data-id=\"e1c91ab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQ<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-668c1df elementor-widget elementor-widget-n-accordion\" data-id=\"668c1df\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;expanded&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1070\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-1070\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> How often do we actually need to maintain the dynamic mixing head? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1070\" class=\"elementor-element elementor-element-666d3f5 e-con-full e-flex e-con e-child\" data-id=\"666d3f5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1070\" class=\"elementor-element elementor-element-3fa5bf3 e-flex e-con-boxed e-con e-child\" data-id=\"3fa5bf3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9250858 elementor-widget elementor-widget-text-editor\" data-id=\"9250858\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Every 2 hours of continuous production. A quick visual inspection and purge prevents dead material from building up and causing random surface blisters later in the shift.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1071\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1071\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Why do we get more surface defects during winter? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1071\" class=\"elementor-element elementor-element-745eb0d e-con-full e-flex e-con e-child\" data-id=\"745eb0d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1071\" class=\"elementor-element elementor-element-7efe4bb e-flex e-con-boxed e-con e-child\" data-id=\"7efe4bb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f721321 elementor-widget elementor-widget-text-editor\" data-id=\"f721321\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Cold metal. If your mold drops below 45\u00b0C, the solvents or water in the release agent can&#8217;t evaporate fast enough. You end up pouring liquid PU directly onto wet solvent, which causes violent gas reactions and pits the surface of the sole.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1072\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1072\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> How do we clean CNC metal molds without using toxic DMF pools? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1072\" class=\"elementor-element elementor-element-cb93ca7 e-con-full e-flex e-con e-child\" data-id=\"cb93ca7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1072\" class=\"elementor-element elementor-element-8d3d3b7 e-flex e-con-boxed e-con e-child\" data-id=\"8d3d3b7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7fe6436 elementor-widget elementor-widget-text-editor\" data-id=\"7fe6436\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Stop soaking molds in DMF. Modern factories use eco-friendly, high-boiling-point mold washing solvents. Pair this with an industrial sandblasting machine for routine maintenance. Sandblasting safely strips baked-on chemical scale without ruining your mold&#8217;s micro-textures.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1073\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1073\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Can I test flex strength right after pulling the sole from the mold? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1073\" class=\"elementor-element elementor-element-ef1b472 e-flex e-con-boxed e-con e-child\" data-id=\"ef1b472\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ac565ce elementor-widget elementor-widget-text-editor\" data-id=\"ac565ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>No. While it feels solid after 5 minutes, the chemical cross-linking inside is still happening. If you test it immediately, it will fail. Let it rest (post-cure) at room temperature for 24 hours before you trim, paint, or run lab tests.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1074\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"5\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1074\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Is it normal for the first few soles of the day to look bad? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1074\" class=\"elementor-element elementor-element-a7fdeb4 e-flex e-con-boxed e-con e-child\" data-id=\"a7fdeb4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f553992 elementor-widget elementor-widget-text-editor\" data-id=\"f553992\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Yes, if you don&#8217;t pre-heat properly. The first few pours act as &#8220;sacrificial heat sinks,&#8221; losing all their chemical reaction heat to the cold steel core of the mold. Pre-heat your molds for a few hours before you start the line.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-412527b elementor-widget elementor-widget-html\" data-id=\"412527b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"How often do we actually need to maintain the dynamic mixing head?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Every 2 hours of continuous production. A quick visual inspection and purge prevents dead material from building up and causing random surface blisters later in the shift.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Why do we get more surface defects during winter?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Cold metal. If your mold drops below 45\u00b0C, the solvents or water in the release agent cannot evaporate fast enough. You end up pouring liquid PU directly onto wet solvent, which causes violent gas reactions and pits the surface of the sole.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"How do we clean CNC metal molds without using toxic DMF pools?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Stop soaking molds in DMF. Modern factories use eco-friendly, high-boiling-point mold washing solvents. Pair this with an industrial sandblasting machine for routine maintenance. Sandblasting safely strips baked-on chemical scale without ruining your mold's micro-textures.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can I test flex strength right after pulling the sole from the mold?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"No. While it feels solid after 5 minutes, the chemical cross-linking inside is still happening. If you test it immediately, it will fail. Let it rest (post-cure) at room temperature for 24 hours before you trim, paint, or run lab tests.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Is it normal for the first few soles of the day to look bad?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Yes, if you do not pre-heat properly. The first few pours act as 'sacrificial heat sinks,' losing all their chemical reaction heat to the cold steel core of the mold. Pre-heat your molds for a few hours before you start the line.\"\r\n      }\r\n    }\r\n  ]\r\n}\r\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e74f193 e-flex e-con-boxed e-con e-parent\" data-id=\"e74f193\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fee5b2e elementor-widget elementor-widget-author-box\" data-id=\"fee5b2e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"author-box.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-author-box\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/www.linkedin.com\/in\/jiacheng-dai-haifeng-automation\/%20EEAT\u80cc\u4e66\" class=\"elementor-author-box__avatar\" target=\"_blank\" rel=\"noopener\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/haifengmachine.com\/wp-content\/uploads\/2026\/04\/6f52b74a24f1daff3840682463cc195c-300x300.png\" alt=\"Picture of Jiacheng Dai\" loading=\"lazy\" title=\"\">\n\t\t\t\t<\/a>\n\t\t\t\n\t\t\t<div class=\"elementor-author-box__text\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.linkedin.com\/in\/jiacheng-dai-haifeng-automation\/%20EEAT\u80cc\u4e66\" target=\"_blank\" rel=\"noopener\">\n\t\t\t\t\t\t<span class=\"elementor-author-box__name\">\n\t\t\t\t\t\t\tJiacheng Dai\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-author-box__bio\">\n\t\t\t\t\t\t<p>Vice President, Sales & Marketing of Zhejiang Haifeng Automation Equipment Co., Ltd<br \/>\n- Member of the Polyurethane Equipment Professional Committee, China Polyurethane Industry Association<br \/>\n- Member of the Expert Committee on Footwear and Apparel Equipment, China Leather Association<br \/>\n- Executive Vice President, Wenzhou Footwear Machinery Chamber of Commerce, China<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Eliminate PU sole blisters, pitting, and demolding failures. Haifeng&#8217;s Chief Engineer reveals the ultimate workshop troubleshooting matrix, detailing how precise thermal control, ESG-compliant release agents, and water-wash mixing heads guarantee a 98%+ yield rate.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"table_tags":[],"class_list":["post-6017","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/posts\/6017","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/comments?post=6017"}],"version-history":[{"count":9,"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/posts\/6017\/revisions"}],"predecessor-version":[{"id":6195,"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/posts\/6017\/revisions\/6195"}],"wp:attachment":[{"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/media?parent=6017"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/categories?post=6017"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/tags?post=6017"},{"taxonomy":"table_tags","embeddable":true,"href":"https:\/\/haifengmachine.com\/ru\/wp-json\/wp\/v2\/table_tags?post=6017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}