{"id":6988,"date":"2024-02-26T06:28:18","date_gmt":"2024-02-26T06:28:18","guid":{"rendered":"https:\/\/xinjuexin.com\/?page_id=6988"},"modified":"2024-04-28T10:54:21","modified_gmt":"2024-04-28T10:54:21","slug":"knowledge-center","status":"publish","type":"page","link":"https:\/\/xinjuexin.com\/knowledge-center\/","title":{"rendered":"Knowledge Center"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"6988\" class=\"elementor elementor-6988\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a2d42a4 e-flex e-con-boxed e-con e-parent\" data-id=\"a2d42a4\" data-element_type=\"container\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\n\t\t<div class=\"elementor-element elementor-element-488b416 elementor-widget elementor-widget-heading\" data-id=\"488b416\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 11-03-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">Knowledge Center<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-74578dc elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"74578dc\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a6d2c86\" data-id=\"a6d2c86\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t<div class=\"elementor-element elementor-element-12b7c78 e-flex e-con-boxed e-con e-parent\" data-id=\"12b7c78\" data-element_type=\"container\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5c3d0bd elementor-widget elementor-widget-elementskit-heading\" data-id=\"5c3d0bd\" data-element_type=\"widget\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_center   ekit_heading_tablet-   ekit_heading_mobile-\"><h2 class=\"ekit-heading--title elementskit-section-title \">Moulding defects<\/h2><\/div><\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87beff9 xj-table-block elementor-widget elementor-widget-text-editor\" data-id=\"87beff9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 11-03-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<table width=\"504\">\n<tbody>\n<tr>\n<td colspan=\"4\" width=\"1019\">Injection moulding is a complex technology with possible production problems. They can be caused either by defects in the moulds, or more often by the moulding process itself.<\/td>\n<\/tr>\n<tr>\n<td width=\"180\">Moulding\u00a0defects<\/td>\n<td width=\"180\">Alternative\u00a0name<\/td>\n<td width=\"180\">Descriptions<\/td>\n<td width=\"369\">Causes<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Blister<\/td>\n<td width=\"218\">Blistering<\/td>\n<td width=\"214\">Raised\u00a0or\u00a0layered\u00a0zone\u00a0on\u00a0surface\u00a0of\u00a0the\u00a0part<\/td>\n<td width=\"369\">Tool or material is too hot, often caused by a lack of cooling around\nthe tool or a faulty heater.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Burn\u00a0marks<\/td>\n<td width=\"218\">Air\u00a0burn\/gas\u00a0burn\/dieseling\/gas\u00a0marks\/Blow\u00a0marks<\/td>\n<td width=\"214\">Black or brown burnt areas on the part located at furthest points from gate or where air is trapped<\/td>\n<td width=\"369\">Tool lacks venting, injection speed is too high.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Colour\u00a0streaks<\/td>\n<td width=\"218\"><\/td>\n<td width=\"214\">Localised\u00a0change\u00a0of\u00a0colour<\/td>\n<td width=\"369\">Masterbatch isn&#8217;t mixing properly, or the material has run out\nand it&#8217;s starting to come through as natural only. Previous coloured\nmaterial &#8220;dragging&#8221; in nozzle or check valve.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Contamination<\/td>\n<td width=\"218\">Unwanted\u00a0or\u00a0foreign\u00a0material<\/td>\n<td width=\"214\">Different colour matter seen in product, weakening the product<\/td>\n<td width=\"369\">Poor material introduced by bad recycling or regrind policy;\nmay include floor sweepings, dust and debris.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Delamination<\/td>\n<td width=\"218\"><\/td>\n<td width=\"214\">Thin\u00a0mica\u00a0like\u00a0layers\u00a0formed\u00a0in\u00a0part\u00a0wall<\/td>\n<td width=\"369\">Contamination of the material e.g. PP mixed with ABS, very\ndangerous if the part is being used for a safety critical application\nas the material has very little strength when delaminated as the\nmaterials cannot bond.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Flash<\/td>\n<td width=\"218\"><\/td>\n<td width=\"214\">Excess material in thin layer exceeding normal part geometry<\/td>\n<td width=\"369\">Mould is over packed or parting line on the tool is damaged, too\nmuch injection speed\/material injected, clamping force too low.\nCan also be caused by dirt and contaminants around tooling surfaces.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Embedded\u00a0contaminates<\/td>\n<td width=\"218\">Embedded\u00a0particulates<\/td>\n<td width=\"214\">Foreign particle (burnt material or other) embedded in the part<\/td>\n<td width=\"369\">Particles on the tool surface, contaminated material or foreign\ndebris in the barrel, or too much shear heat burning the material\nprior to injection.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Flow\u00a0marks<\/td>\n<td width=\"218\">Flow\u00a0lines<\/td>\n<td width=\"214\">Directionally &#8220;off tone&#8221; wavy lines or patterns<\/td>\n<td width=\"369\">Injection speeds too slow (the plastic has cooled down too much\nduring injection, injection speeds should be set as fast as is\nappropriate for the process and material used).<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Gate\u00a0Blush<\/td>\n<td width=\"218\">Halo\u00a0or\u00a0Blush\u00a0Marks<\/td>\n<td width=\"214\">Circular pattern around gate, normally only an issue on hot runner molds<\/td>\n<td width=\"369\">Injection speed is too fast, gate\/sprue\/runner size is too small, or the\nmelt\/mold temp is too low.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Jetting<\/td>\n<td width=\"218\"><\/td>\n<td width=\"214\">Jetting is a snake-like stream which occurs when polymer melt is pushed at a high velocity through restrictive areas.<\/td>\n<td width=\"369\">Poor\u00a0tool\u00a0design,\u00a0gate\u00a0position\u00a0or\u00a0runner.\u00a0Injection\u00a0speed\u00a0set\u00a0too\u00a0high.\nPoor\u00a0design\u00a0of\u00a0gates,\u00a0which\u00a0causes\u00a0too\u00a0little\u00a0die\u00a0swell\u00a0and\u00a0result\u00a0jetting.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Knit\u00a0lines<\/td>\n<td width=\"218\">Weld\u00a0lines<\/td>\n<td width=\"214\">Small lines on the backside of core pins or windows in parts that look like just lines.<\/td>\n<td width=\"369\">Caused by the melt-front flowing around an object standing proud in a plastic part as well as at the end of fill where the melt-front comes together again. Can be minimised or eliminated with a mould-flow study when the mould is in design phase. Once the mould is made and the gate is placed, one can minimise this flaw only by changing the melt and the mould temperature.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Polymer\u00a0degradation<\/td>\n<td width=\"218\"><\/td>\n<td width=\"214\">Polymer breakdown from hydrolysis, oxidation etc.<\/td>\n<td width=\"369\">Excess water in the granules, excessive temperatures in barrel, excessive screw speeds causing high shear heat, material being allowed to sit in the barrel for too long, too much regrind being used.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Sink\u00a0marks<\/td>\n<td width=\"218\">Sinks<\/td>\n<td width=\"214\">Localised\u00a0depression\u00a0(In\u00a0thicker\u00a0zones)<\/td>\n<td width=\"369\">Holding time\/pressure too low, cooling time too short, with sprueless hot runners this can also be caused by the gate temperature being set too high. Excessive material or walls too thick.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Short\u00a0shot<\/td>\n<td width=\"218\">Short\u00a0fill\u00a0or\u00a0short\u00a0mould<\/td>\n<td width=\"214\">Partial\u00a0part<\/td>\n<td width=\"369\">Lack of material, injection speed or pressure too low, mould too cold, lack of gas vents.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Splay\u00a0marks<\/td>\n<td width=\"218\">Splash\u00a0mark\u00a0or\u00a0silver\u00a0streaks<\/td>\n<td width=\"214\">Usually appears as silver streaks along the flow pattern, however depending on the type and colour of material it may represent as small bubbles caused by trapped moisture.<\/td>\n<td width=\"369\">Moisture in the material, usually when hygroscopic resins are dried improperly. Trapping of gas in &#8220;rib&#8221; areas due to excessive injection velocity in these areas. Material too hot, or is being sheared too much.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Stringiness<\/td>\n<td width=\"218\">Stringing\u00a0or\u00a0long-gate<\/td>\n<td width=\"214\">String like remnant from previous shot transfer in new shot<\/td>\n<td width=\"369\">Nozzle temperature too high. Gate hasn&#8217;t frozen off, no decompression of the screw, no sprue break, poor placement of the heater bands inside the tool.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Voids<\/td>\n<td width=\"218\"><\/td>\n<td width=\"214\">Empty space within part (air pocket is commonly used)<\/td>\n<td width=\"369\">Lack of holding pressure (holding pressure is used to pack out the part during the holding time). Filling too fast, not allowing the edges of the part to set up. Also mould may be out of registration (when the two halves don&#8217;t centre properly and part walls are not the same thickness). The provided information is the common understanding, Correction: The Lack of pack (not holding) pressure (pack pressure is used to pack out even though is the part during the holding time). Filling too fast does not cause this condition, as a void is a sink that did not have a place to happen. In other words, as the part shrinks the resin separated from itself as there was not sufficient resin in the cavity. The void could happen at any area or the part is not limited by the thickness but by the resin flow and thermal conductivity, but it is more likely to happen at thicker areas like ribs or bosses. Additional root causes for voids are un-melt on the melt pool.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Weld\u00a0line<\/td>\n<td width=\"218\">Knit\u00a0line\u00a0\/\u00a0Meld\u00a0line\u00a0\/\u00a0Transfer\u00a0line<\/td>\n<td width=\"214\">Discoloured line where two flow fronts meet<\/td>\n<td width=\"369\">Mould or material temperatures set too low (the material is cold when they meet, so they don&#8217;t bond). Time for transition between injection and transfer (to packing and holding) is too early.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Warping<\/td>\n<td width=\"218\">Twisting<\/td>\n<td width=\"214\">Distorted\u00a0part<\/td>\n<td width=\"369\">Cooling is too short, material is too hot, lack of cooling around the tool, incorrect water temperatures (the parts bow inwards towards the hot side of the tool) Uneven shrinking between areas of the part.<\/td>\n<\/tr>\n<tr>\n<td width=\"218\">Cracks<\/td>\n<td width=\"218\">Crazing<\/td>\n<td width=\"214\">Improper fusion of two fluid flows, a state before weld line.<\/td>\n<td width=\"369\">Threadline gap in-between part due to improper gate location in complex design parts including excess of holes (multipoint gates to be provided), process optimization, proper air venting.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-20ca6cc elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"20ca6cc\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a671b89\" data-id=\"a671b89\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f2f02ce e-flex e-con-boxed e-con e-parent\" data-id=\"f2f02ce\" data-element_type=\"container\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cc1a813 elementor-widget elementor-widget-elementskit-heading\" data-id=\"cc1a813\" data-element_type=\"widget\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_center   ekit_heading_tablet-   ekit_heading_mobile-\"><h2 class=\"ekit-heading--title elementskit-section-title \">Basic characteristics and molding temperature of ordinary plastics<\/h2><\/div><\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e4f401b xj-table-block elementor-widget elementor-widget-text-editor\" data-id=\"e4f401b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<table width=\"504\"><tbody><tr><td width=\"72\">Material\u00a0inEnglish<\/td><td width=\"72\">Density<\/td><td width=\"72\">Glass\u00a0fibercontent<\/td><td width=\"72\">The\u00a0averageheat<\/td><td width=\"72\">Moldingtemperature<\/td><td width=\"72\">Moldtemperature<\/td><td width=\"72\">Shrinkage<\/td><\/tr><tr><td width=\"72\">PS<\/td><td width=\"72\">1.05<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.3<\/td><td width=\"72\">180-280<\/td><td width=\"72\">10<\/td><td width=\"72\">0.3-0.6<\/td><\/tr><tr><td width=\"72\">HIPS<\/td><td width=\"72\">1.05<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.21<\/td><td width=\"72\">170-260<\/td><td width=\"72\">5-75<\/td><td width=\"72\">0.5-0.6<\/td><\/tr><tr><td width=\"72\">SAN<\/td><td width=\"72\">1.08<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.3<\/td><td width=\"72\">180-270<\/td><td width=\"72\">50-80<\/td><td width=\"72\">0.5-0.7<\/td><\/tr><tr><td width=\"72\">ABS<\/td><td width=\"72\">1.06<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.4<\/td><td width=\"72\">210-275<\/td><td width=\"72\">50-90<\/td><td width=\"72\">0.4-0.7<\/td><\/tr><tr><td width=\"72\">ASA<\/td><td width=\"72\">1.07<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.3<\/td><td width=\"72\">230-260<\/td><td width=\"72\">40-90<\/td><td width=\"72\">0.4-0.6<\/td><\/tr><tr><td width=\"72\">LDPE<\/td><td width=\"72\">0.954<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">2<\/td><td width=\"72\">160-260<\/td><td width=\"72\">50-70<\/td><td width=\"72\">1.5-5.0<\/td><\/tr><tr><td width=\"72\">HDPE<\/td><td width=\"72\">0.92<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">2.3-2.5<\/td><td width=\"72\">260-300<\/td><td width=\"72\">30-70<\/td><td width=\"72\">1.5-3.0<\/td><\/tr><tr><td width=\"72\">PP<\/td><td width=\"72\">0.915<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">0.84-2.5<\/td><td width=\"72\">250-270<\/td><td width=\"72\">50-75<\/td><td width=\"72\">1.0-2.5<\/td><\/tr><tr><td width=\"72\">PPGR<\/td><td width=\"72\">1.15<\/td><td width=\"72\">30<\/td><td width=\"72\">1.1-1.35<\/td><td width=\"72\">260-280<\/td><td width=\"72\">50-80<\/td><td width=\"72\">0.5-1.2<\/td><\/tr><tr><td width=\"72\">IB<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">150-220<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><\/tr><tr><td width=\"72\">PMP<\/td><td width=\"72\">0.83<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">280-310<\/td><td width=\"72\">70<\/td><td width=\"72\">1.5-3.0<\/td><\/tr><tr><td width=\"72\">PVC-SOFT<\/td><td width=\"72\">1.38<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">0.85<\/td><td width=\"72\">170-200<\/td><td width=\"72\">15-50<\/td><td width=\"72\">&gt;0.5<\/td><\/tr><tr><td width=\"72\">PVC-RIGID<\/td><td width=\"72\">1.38<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">0.83-0.92<\/td><td width=\"72\">180-210<\/td><td width=\"72\">30-50<\/td><td width=\"72\">0.5<\/td><\/tr><tr><td width=\"72\">PVDF<\/td><td width=\"72\">1.2<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">250-270<\/td><td width=\"72\">90-100<\/td><td width=\"72\">3.0-6.0<\/td><\/tr><tr><td width=\"72\">PTFE<\/td><td width=\"72\">2.12-2.17<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">0.12<\/td><td width=\"72\">320-360<\/td><td width=\"72\">200-230<\/td><td width=\"72\">3.5-6.0<\/td><\/tr><tr><td width=\"72\">FEP<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><td colspan=\"2\" width=\"144\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><\/tr><tr><td width=\"72\">PMMA<\/td><td width=\"72\">1.18<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.46<\/td><td width=\"72\">210-240<\/td><td width=\"72\">50-70<\/td><td width=\"72\">0.1-0.8<\/td><\/tr><tr><td width=\"72\">POM<\/td><td width=\"72\">1.42<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.47-1.5<\/td><td width=\"72\">200-210<\/td><td width=\"72\">&gt;90<\/td><td width=\"72\">1.9-2.3<\/td><\/tr><tr><td width=\"72\">PPO<\/td><td width=\"72\">1.06<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.45<\/td><td width=\"72\">250-300<\/td><td width=\"72\">80-100<\/td><td width=\"72\">0.5-0.7<\/td><\/tr><tr><td width=\"72\">PPO-GR<\/td><td width=\"72\">1.27<\/td><td width=\"72\">30<\/td><td width=\"72\">1.3<\/td><td width=\"72\">280-300<\/td><td width=\"72\">80-100<\/td><td width=\"72\">&lt;0.7<\/td><\/tr><tr><td width=\"72\">CA<\/td><td width=\"72\">1.27-1.3<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.3-1.7<\/td><td width=\"72\">180-320<\/td><td width=\"72\">50-80<\/td><td width=\"72\">0.5<\/td><\/tr><tr><td width=\"72\">CAB<\/td><td width=\"72\">1.17-1.22<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.3-1.7<\/td><td width=\"72\">180-230<\/td><td width=\"72\">50-80<\/td><td width=\"72\">0.5<\/td><\/tr><tr><td width=\"72\">CP<\/td><td width=\"72\">1.19-1.23<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.7<\/td><td width=\"72\">180-230<\/td><td width=\"72\">50-80<\/td><td width=\"72\">0.5<\/td><\/tr><tr><td width=\"72\">PC<\/td><td width=\"72\">1.2<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.3<\/td><td width=\"72\">280-320<\/td><td width=\"72\">80-100<\/td><td width=\"72\">0.8<\/td><\/tr><tr><td width=\"72\">PC-GR<\/td><td width=\"72\">1.42<\/td><td width=\"72\">10-32<\/td><td width=\"72\">1.1<\/td><td width=\"72\">300-330<\/td><td width=\"72\">100-120<\/td><td width=\"72\">0.15-0.55<\/td><\/tr><tr><td width=\"72\">PET<\/td><td width=\"72\">1.37<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">260-290<\/td><td width=\"72\">140<\/td><td width=\"72\">1.2-2.0<\/td><\/tr><tr><td width=\"72\">PET-GR<\/td><td width=\"72\">1.5-1.57<\/td><td width=\"72\">20-30<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">260-290<\/td><td width=\"72\">140<\/td><td width=\"72\">1.2-2.0<\/td><\/tr><tr><td width=\"72\">PBT<\/td><td width=\"72\">1.3<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">240-260<\/td><td width=\"72\">60-80<\/td><td width=\"72\">1.5-2.5<\/td><\/tr><tr><td width=\"72\">PBT-GR<\/td><td width=\"72\">1.52-1.57<\/td><td width=\"72\">30-50<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">250-270<\/td><td width=\"72\">60-80<\/td><td width=\"72\">0.3-1.2<\/td><\/tr><tr><td width=\"72\">PA6<\/td><td width=\"72\">1.14<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.8<\/td><td width=\"72\">240-260<\/td><td width=\"72\">70-120<\/td><td width=\"72\">0.5-2.2<\/td><\/tr><tr><td width=\"72\">PA6-GR<\/td><td width=\"72\">1.36-1.65<\/td><td width=\"72\">30-50<\/td><td width=\"72\">1.26-1.7<\/td><td width=\"72\">270-290<\/td><td width=\"72\">70-120<\/td><td width=\"72\">0.3-1<\/td><\/tr><tr><td width=\"72\">PA6\/6<\/td><td width=\"72\">1.15<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.7<\/td><td width=\"72\">260-290<\/td><td width=\"72\">70-120<\/td><td width=\"72\">0.5-2.5<\/td><\/tr><tr><td width=\"72\">PA6\/6-GR<\/td><td width=\"72\">1.2-1.65<\/td><td width=\"72\">30-50<\/td><td width=\"72\">1.4<\/td><td width=\"72\">280-310<\/td><td width=\"72\">70-120<\/td><td width=\"72\">0.5-1.5<\/td><\/tr><tr><td width=\"72\">PA11<\/td><td width=\"72\">1.03-1.05<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">2.4<\/td><td width=\"72\">210-250<\/td><td width=\"72\">40-80<\/td><td width=\"72\">0.5-1.5<\/td><\/tr><tr><td width=\"72\">PA12<\/td><td width=\"72\">1.01-1.04<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.2<\/td><td width=\"72\">210-250<\/td><td width=\"72\">40-80<\/td><td width=\"72\">0.5-1.5<\/td><\/tr><tr><td width=\"72\">PSO<\/td><td width=\"72\">1.37<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">310-390<\/td><td width=\"72\">100-160<\/td><td width=\"72\">0.7<\/td><\/tr><tr><td width=\"72\">PPS<\/td><td width=\"72\">1.64<\/td><td width=\"72\">40<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">370<\/td><td width=\"72\">&gt;150<\/td><td width=\"72\">0.2<\/td><\/tr><tr><td width=\"72\">PUR<\/td><td width=\"72\">1.2<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.85<\/td><td width=\"72\">195-230<\/td><td width=\"72\">20-40<\/td><td width=\"72\">0.9<\/td><\/tr><tr><td width=\"72\">PF<\/td><td width=\"72\">1.4<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.3<\/td><td width=\"72\">60-80<\/td><td width=\"72\">170-190<\/td><td width=\"72\">1.2<\/td><\/tr><tr><td width=\"72\">MF<\/td><td width=\"72\">1.5<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.3<\/td><td width=\"72\">70-80<\/td><td width=\"72\">150-165<\/td><td width=\"72\">1.2-2<\/td><\/tr><tr><td width=\"72\">MPF<\/td><td width=\"72\">1.6<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">1.1<\/td><td width=\"72\">60-80<\/td><td width=\"72\">160-180<\/td><td width=\"72\">0.8-1.8<\/td><\/tr><tr><td width=\"72\">UP<\/td><td width=\"72\">2.0-2.1<\/td><td width=\"72\">\u00a0<\/td><td width=\"72\">0.9<\/td><td width=\"72\">40-60<\/td><td width=\"72\">150-170<\/td><td width=\"72\">0.5-0.8<\/td><\/tr><tr><td width=\"72\">EP<\/td><td width=\"72\">1.9<\/td><td width=\"72\">30-80<\/td><td width=\"72\">1.7-1.9<\/td><td width=\"72\">160-170<\/td><td width=\"72\">CA70<\/td><td width=\"72\">0.2<\/td><\/tr><tr><td colspan=\"7\" width=\"504\">Shrinkage\u00a0of\u00a0Soft\u00a0PE\u00a0is\u00a02.5%<\/td><\/tr><\/tbody><\/table><p>\u00a0<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f31c0b6 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f31c0b6\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d88ed01\" data-id=\"d88ed01\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7784a8b e-flex e-con-boxed e-con e-parent\" data-id=\"7784a8b\" data-element_type=\"container\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4d78ffc elementor-widget elementor-widget-elementskit-heading\" data-id=\"4d78ffc\" data-element_type=\"widget\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_center   ekit_heading_tablet-   ekit_heading_mobile-\"><h2 class=\"ekit-heading--title elementskit-section-title \">Shrinkage table of rubber compound<\/h2><\/div><\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9ad5e74 xj-table-block elementor-widget elementor-widget-text-editor\" data-id=\"9ad5e74\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<table width=\"864\">\n<tbody>\n<tr>\n<td width=\"72\">Rubber\u00a0type<\/td>\n<td width=\"72\">Hardness<\/td>\n<td width=\"72\">The\u00a0scope\u00a0of\u00a0 shrinkage<\/td>\n<td width=\"72\">The\u00a0normal\u00a0 values<\/td>\n<td width=\"72\">Rubber\u00a0type<\/td>\n<td width=\"72\">Hardness<\/td>\n<td width=\"72\">The\u00a0scope\u00a0of\u00a0 shrinkage<\/td>\n<td width=\"72\">The\u00a0normal\u00a0 values<\/td>\n<td width=\"72\">Rubber\u00a0type<\/td>\n<td width=\"72\">Hardness<\/td>\n<td width=\"72\">The\u00a0scope\u00a0of\u00a0 shrinkage<\/td>\n<td width=\"72\">The\u00a0normal\u00a0 values<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"10\" width=\"72\">\u00a0\u00a0\u00a0NR<\/td>\n<td width=\"72\">40<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.2<\/td>\n<td rowspan=\"10\" width=\"72\">EPDM<\/td>\n<td width=\"72\">40<\/td>\n<td width=\"72\">2.2~2.6<\/td>\n<td width=\"72\">2.5<\/td>\n<td rowspan=\"10\" width=\"72\">SBR<\/td>\n<td width=\"72\">40<\/td>\n<td width=\"72\">2.1~2.4<\/td>\n<td width=\"72\">2.4<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">45<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.15<\/td>\n<td width=\"72\">45<\/td>\n<td width=\"72\">2.1~2.6<\/td>\n<td width=\"72\">2.4<\/td>\n<td width=\"72\">45<\/td>\n<td width=\"72\">2.1~2.4<\/td>\n<td width=\"72\">2.35<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">50<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.1<\/td>\n<td width=\"72\">50<\/td>\n<td width=\"72\">2.1~2.6<\/td>\n<td width=\"72\">2.3<\/td>\n<td width=\"72\">50<\/td>\n<td width=\"72\">2.1~2.4<\/td>\n<td width=\"72\">2.3<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">55<\/td>\n<td width=\"72\">2.0~2.2<\/td>\n<td width=\"72\">2.05<\/td>\n<td width=\"72\">55<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.25<\/td>\n<td width=\"72\">55<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.25<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">60<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">2<\/td>\n<td width=\"72\">60<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.2<\/td>\n<td width=\"72\">60<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.2<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">65<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">1.9<\/td>\n<td width=\"72\">65<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">2.15<\/td>\n<td width=\"72\">65<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">2.15<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">70<\/td>\n<td width=\"72\">1.7~2.0<\/td>\n<td width=\"72\">1.8<\/td>\n<td width=\"72\">70<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">2.05<\/td>\n<td width=\"72\">70<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">2.05<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">75<\/td>\n<td width=\"72\">1.7~2.0<\/td>\n<td width=\"72\">1.75<\/td>\n<td width=\"72\">75<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">2<\/td>\n<td width=\"72\">75<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">2<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">80<\/td>\n<td width=\"72\">1.6~1.9<\/td>\n<td width=\"72\">1.7<\/td>\n<td width=\"72\">80<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.95<\/td>\n<td width=\"72\">80<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.9<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">85<\/td>\n<td width=\"72\">1.6~1.9<\/td>\n<td width=\"72\">1.65<\/td>\n<td width=\"72\">85<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.85<\/td>\n<td width=\"72\">85<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.8<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"10\" width=\"72\">CR(Neoprene)<\/td>\n<td width=\"72\">40<\/td>\n<td width=\"72\">2.1~2.4<\/td>\n<td width=\"72\">2.3<\/td>\n<td rowspan=\"10\" width=\"72\">Silicone<\/td>\n<td width=\"72\">40<\/td>\n<td width=\"72\">3.2~3.6<\/td>\n<td width=\"72\">3.55<\/td>\n<td colspan=\"4\" rowspan=\"20\" width=\"288\"><\/td>\n<\/tr>\n<tr>\n<td width=\"72\">45<\/td>\n<td width=\"72\">2.1~2.4<\/td>\n<td width=\"72\">2.25<\/td>\n<td width=\"72\">45<\/td>\n<td width=\"72\">3.2~3.6<\/td>\n<td width=\"72\">3.4<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">50<\/td>\n<td width=\"72\">2.1~2.4<\/td>\n<td width=\"72\">2.2<\/td>\n<td width=\"72\">50<\/td>\n<td width=\"72\">3.2~3.6<\/td>\n<td width=\"72\">3.3<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">55<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.15<\/td>\n<td width=\"72\">55<\/td>\n<td width=\"72\">3.0~3.4<\/td>\n<td width=\"72\">3.25<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">60<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.1<\/td>\n<td width=\"72\">60<\/td>\n<td width=\"72\">3.0~3.4<\/td>\n<td width=\"72\">3.2<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">65<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">2.05<\/td>\n<td width=\"72\">65<\/td>\n<td width=\"72\">3.0~3.4<\/td>\n<td width=\"72\">3.15<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">70<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">1.95<\/td>\n<td width=\"72\">70<\/td>\n<td width=\"72\">3.0~3.2<\/td>\n<td width=\"72\">3.05<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">75<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.9<\/td>\n<td width=\"72\">75<\/td>\n<td width=\"72\">2.8~3.2<\/td>\n<td width=\"72\">3<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">80<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.85<\/td>\n<td width=\"72\">80<\/td>\n<td width=\"72\">2.8~3.2<\/td>\n<td width=\"72\">2.95<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">85<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.8<\/td>\n<td width=\"72\">85<\/td>\n<td width=\"72\">2.8~3.2<\/td>\n<td width=\"72\">2.9<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"10\" width=\"72\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0NBR<\/td>\n<td width=\"72\">40<\/td>\n<td width=\"72\">2.1~2.4<\/td>\n<td width=\"72\">2.35<\/td>\n<td rowspan=\"10\" width=\"72\">FKM<\/td>\n<td width=\"72\">40<\/td>\n<td width=\"72\">3.4~3.9<\/td>\n<td width=\"72\">3.7<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">45<\/td>\n<td width=\"72\">2.1~2.4<\/td>\n<td width=\"72\">2.3<\/td>\n<td width=\"72\">45<\/td>\n<td width=\"72\">3.4~3.9<\/td>\n<td width=\"72\">3.6<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">50<\/td>\n<td width=\"72\">2.1~2.4<\/td>\n<td width=\"72\">2.25<\/td>\n<td width=\"72\">50<\/td>\n<td width=\"72\">3.2~3.6<\/td>\n<td width=\"72\">3.5<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">55<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.2<\/td>\n<td width=\"72\">55<\/td>\n<td width=\"72\">3.2~3.6<\/td>\n<td width=\"72\">3.4<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">60<\/td>\n<td width=\"72\">2.0~2.3<\/td>\n<td width=\"72\">2.15<\/td>\n<td width=\"72\">60<\/td>\n<td width=\"72\">3.2~3.6<\/td>\n<td width=\"72\">3.3<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">65<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">2.1<\/td>\n<td width=\"72\">65<\/td>\n<td width=\"72\">3.2~3.6<\/td>\n<td width=\"72\">3.25<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">70<\/td>\n<td width=\"72\">1.9~2.2<\/td>\n<td width=\"72\">2<\/td>\n<td width=\"72\">70<\/td>\n<td width=\"72\">3.0~3.4<\/td>\n<td width=\"72\">3.15<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">75<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.95<\/td>\n<td width=\"72\">75<\/td>\n<td width=\"72\">3.0~3.4<\/td>\n<td width=\"72\">3.1<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">80<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.9<\/td>\n<td width=\"72\">80<\/td>\n<td width=\"72\">2.8~3.2<\/td>\n<td width=\"72\">3<\/td>\n<\/tr>\n<tr>\n<td width=\"72\">85<\/td>\n<td width=\"72\">1.8~2.0<\/td>\n<td width=\"72\">1.85<\/td>\n<td width=\"72\">85<\/td>\n<td width=\"72\">2.8~3.2<\/td>\n<td width=\"72\">2.95<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-77f2293 e-flex e-con-boxed e-con e-parent\" data-id=\"77f2293\" data-element_type=\"container\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb953d4 elementor-widget elementor-widget-text-editor\" data-id=\"fb953d4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>Remarks: The above shrinkage rate values are for reference only. Different product structure, formula, manufacturing process etc. will affect the shrinkage rate.<\/strong><\/p>\t\t\t\t\t\t<\/div>\n\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>Knowledge Center Moulding defects Injection moulding is a complex technology with possible production problems. They can be caused either by defects in the moulds, or more often by the moulding process itself. Moulding\u00a0defects Alternative\u00a0name Descriptions Causes Blister Blistering Raised\u00a0or\u00a0layered\u00a0zone\u00a0on\u00a0surface\u00a0of\u00a0the\u00a0part Tool or material is too hot, often caused by a lack of cooling around the tool [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_theme","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-6988","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Knowledge Center - Dongguan Xinjuexin Plastic Hardware Products Factory<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/xinjuexin.com\/knowledge-center\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Knowledge Center - Dongguan Xinjuexin Plastic Hardware Products Factory\" \/>\n<meta property=\"og:description\" content=\"Knowledge Center Moulding defects Injection moulding is a complex technology with possible production problems. They can be caused either by defects in the moulds, or more often by the moulding process itself. Moulding\u00a0defects Alternative\u00a0name Descriptions Causes Blister Blistering Raised\u00a0or\u00a0layered\u00a0zone\u00a0on\u00a0surface\u00a0of\u00a0the\u00a0part Tool or material is too hot, often caused by a lack of cooling around the tool [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/xinjuexin.com\/knowledge-center\/\" \/>\n<meta property=\"og:site_name\" content=\"Dongguan Xinjuexin Plastic Hardware Products Factory\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-28T10:54:21+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/xinjuexin.com\/knowledge-center\/\",\"url\":\"https:\/\/xinjuexin.com\/knowledge-center\/\",\"name\":\"Knowledge Center - Dongguan Xinjuexin Plastic Hardware Products Factory\",\"isPartOf\":{\"@id\":\"https:\/\/xinjuexin.com\/#website\"},\"datePublished\":\"2024-02-26T06:28:18+00:00\",\"dateModified\":\"2024-04-28T10:54:21+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/xinjuexin.com\/knowledge-center\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/xinjuexin.com\/knowledge-center\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/xinjuexin.com\/knowledge-center\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/xinjuexin.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Knowledge Center\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/xinjuexin.com\/#website\",\"url\":\"https:\/\/xinjuexin.com\/\",\"name\":\"Dongguan Xinjuexin Plastic Hardware Products Factory\",\"description\":\"Xinjuexin is a one-stop supplier of molds, plastics and metal products. \",\"publisher\":{\"@id\":\"https:\/\/xinjuexin.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/xinjuexin.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/xinjuexin.com\/#organization\",\"name\":\"Dongguan Xinjuexin Plastic Hardware Products Factory\",\"url\":\"https:\/\/xinjuexin.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/xinjuexin.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/5x25e3.p3cdn1.secureserver.net\/wp-content\/uploads\/2024\/06\/\u65b0\u7235\u946blogo.png?time=1718072908\",\"contentUrl\":\"https:\/\/5x25e3.p3cdn1.secureserver.net\/wp-content\/uploads\/2024\/06\/\u65b0\u7235\u946blogo.png?time=1718072908\",\"width\":1009,\"height\":702,\"caption\":\"Dongguan Xinjuexin Plastic Hardware Products Factory\"},\"image\":{\"@id\":\"https:\/\/xinjuexin.com\/#\/schema\/logo\/image\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Knowledge Center - Dongguan Xinjuexin Plastic Hardware Products Factory","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/xinjuexin.com\/knowledge-center\/","og_locale":"en_US","og_type":"article","og_title":"Knowledge Center - Dongguan Xinjuexin Plastic Hardware Products Factory","og_description":"Knowledge Center Moulding defects Injection moulding is a complex technology with possible production problems. 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