{"id":52106,"date":"2026-02-26T05:28:23","date_gmt":"2026-02-25T21:28:23","guid":{"rendered":"https:\/\/zetarmold.com\/?p=52106"},"modified":"2026-05-31T10:25:59","modified_gmt":"2026-05-31T02:25:59","slug":"was-ist-pom-spritzguss-und-wie-funktioniert-er","status":"publish","type":"post","link":"https:\/\/zetarmold.com\/de\/was-ist-pom-spritzguss-und-wie-funktioniert-er\/","title":{"rendered":"abs"},"content":{"rendered":"<h2>What Is POM Injection Molding and Why Is It So Widely Used?<\/h2>\n<div class=\"callout-key\" style=\"background:#f0f7ff; border-left:4px solid #2563eb; padding:1em 1.2em; border-radius:6px; margin:1.5em 0;\">\n<strong>Wichtigste Erkenntnisse<\/strong><\/p>\n<ul>\n<li>POM (Polyoxymethylen) ist ein reibungsarmes, hochsteifes technisches Thermoplast, ideal f\u00fcr Pr\u00e4zisionsbauteile.<\/li>\n<li>Homopolymer-POM bietet h\u00f6here Festigkeit; Copolymer-POM l\u00e4sst sich einfacher verarbeiten und hat eine bessere thermische Stabilit\u00e4t.<\/li>\n<li>Halten Sie die Zylinder-Temperaturen unter 220\u00b0C, um Formaldehyd-Ausgasungen und Bauteilfehler zu vermeiden.<\/li>\n<li>Entwerfen Sie eine gleichm\u00e4\u00dfige Wandst\u00e4rke von 1,0\u20133,5 mm, um die Schwindung von POM (1,8\u20132,5%) zu kontrollieren.<\/li>\n<li>Die nat\u00fcrliche Gleitf\u00e4higkeit von POM macht es zur bevorzugten Wahl f\u00fcr selbstschmierende Zahnr\u00e4der und Lager.<\/li>\n<\/ul>\n<\/div>\n<p>POM-Spritzgie\u00dfen ist der Prozess der Formgebung von Polyoxymethylen \u2013 ein <a href=\"https:\/\/www.britannica.com\/technology\/plastic\/Engineering-plastics\">engineering thermoplastic<\/a><sup id=\"fnref1:1\"><a href=\"#fn:1\" class=\"footnote-ref\">1<\/a><\/sup>\u2013 in Pr\u00e4zisionsbauteile. Wir nennen POM den \u201eMetallersatz-Kunststoff\u201c wegen seiner metall\u00e4hnlichen Steifigkeit bei geringerer Masse.<\/p>\n<p>If you are comparing vendors or planning procurement, our <a href=\"https:\/\/zetarmold.com\/de\/injection-molding-supplier-sourcing-guide\/\">injection molding supplier sourcing guide<\/a> covers RFQ prep, qualification, and commercial risk checks.<\/p>\n<p>POM comes in two main types: homopolymer (such as DuPont\u2019s Delrin) and copolymer (such as Celanese\u2019s Celcon or BASF\u2019s Ultraform). Homopolymer POM offers slightly higher mechanical strength and stiffness, while copolymer POM provides better thermal stability and easier processing with less centerline porosity.<\/p>\n<p>The global demand for POM injection molded parts continues to grow, driven by the automotive industry\u2019s push for lighter components and the electronics sector\u2019s need for dimensionally stable housings. POM\u2019s self-lubricating properties make it ideal for moving parts that would otherwise require metal-to-metal contact with added lubricants.<\/p>\n<h2>What Are the Key Properties That Make POM Ideal for Injection Molding?<\/h2>\n<p>Die wichtigsten Eigenschaften, die POM ideal f\u00fcr das Spritzgie\u00dfen machen, sind die Hauptkategorien oder Optionen, die in diesem Abschnitt erkl\u00e4rt werden. POM ist ideal f\u00fcr <a href=\"https:\/\/zetarmold.com\/de\/spritzgiesen-komplettleitfaden\/\">Spritzgie\u00dfen<\/a> weil es eine seltene Kombination von hoher Zugfestigkeit (65\u201370 MPa), geringer Reibung (0,20\u20130,35 Koeffizient), hervorragender <a href=\"https:\/\/www.corrosionpedia.com\/definition\/1143\/creep\">creep resistance<\/a><sup id=\"fnref1:2\"><a href=\"#fn:2\" class=\"footnote-ref\">2<\/a><\/sup>und minimale Feuchtigkeitsabsorption \u2013 Eigenschaften, die es zu einem der vielseitigsten technischen Kunststoffe machen, die wir verarbeiten.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;\">\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Eigentum<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">POM Homopolymer<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">POM Copolymer<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Einheit<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Zugfestigkeit<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">65\u201370<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">58\u201365<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">MPa<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Biegemodus<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">2,800\u20133,200<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">2,500\u20132,900<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">MPa<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Dehnung beim Bruch<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">25\u201345<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">40\u201375<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">%<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Impact Strength (Izod, notched)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">65\u201380<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">50\u201365<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">J\/m<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Schmelzpunkt<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">175<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">165<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">\u00b0C<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">HDT at 1.8 MPa<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">110<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">100<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">\u00b0C<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Coefficient of Friction<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">0.20\u20130.35<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">0.25\u20130.38<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">-<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Schimmelpilz <a href=\"https:\/\/www.britannica.com\/technology\/injection-molding\">Schrumpfung<\/a><sup id=\"fnref1:3\"><a href=\"#fn:3\" class=\"footnote-ref\">3<\/a><\/sup><\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">1.8\u20132.5<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">1.8\u20132.2<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">%<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Water Absorption (24h)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">0.20<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">0.22<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Eine Eigenschaft, die POM auszeichnet, ist seine Kriechfestigkeit. Anders als viele Kunststoffe, die unter Dauertlast verformen, beh\u00e4lt POM seine Form auch unter kontinuierlicher Belastung bei erh\u00f6hten Temperaturen. Wir haben POM-Zahnr\u00e4der getestet, die \u00fcber 10.000 Stunden unter Last liefen, mit weniger als 0,3 mm Dimensions\u00e4nderung.<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201eDie geringe Feuchtigkeitsabsorption von POM macht es zu einem der dimensionsstabilsten Kunststoffe f\u00fcr Pr\u00e4zisionsbauteile.\u201c<\/b><span class=\"claim-true-or-false\">Wahr<\/span><\/p>\n<p class=\"claim-explanation\">With only 0.20% water absorption in 24 hours, POM maintains tight tolerances even in humid environments. This is why it\u2019s the go-to material for precision gears, bearings, and instrument housings.<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201ePOM absorbiert viel Feuchtigkeit wie Nylon, daher muss es vor dem Formen immer vorgew\u00e4rmt werden.\u201c<\/b><span class=\"claim-true-or-false\">Falsch<\/span><\/p>\n<p class=\"claim-explanation\">POM has very low water absorption (0.20\u20130.22% in 24 hours), far less than nylon\u2019s 1.5\u20132.8%. While pre-drying at 80\u00b0C for 2\u20134 hours is recommended for optimal surface finish, POM is far less moisture-sensitive than polyamides.<\/p>\n<\/div>\n<h2>What Are the Optimal Processing Parameters for POM Injection Molding?<\/h2>\n<p>Optimales POM-Formen ben\u00f6tigt Zylinder-Temperaturen von 175\u2013210\u00b0C, Werkzeug-Temperaturen von 80\u2013120\u00b0C und Einspritzdr\u00fccke von 70\u2013120 MPa. Die richtigen Parameter sind entscheidend f\u00fcr perfekte Bauteile statt Ausschuss.<\/p>\n<figure style=\"text-align:center;margin:2em 0;\">\n<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"457\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/injection-molding-machine-diag-800x457-1.jpg\" alt=\"Injection Molding Machine Diagram\" class=\"wp-image-53260 size-full\" style=\"max-width:100%;height:auto;\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/injection-molding-machine-diag-800x457-1.jpg 800w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/injection-molding-machine-diag-800x457-1-300x171.jpg 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/injection-molding-machine-diag-800x457-1-768x439.jpg 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/injection-molding-machine-diag-800x457-1-18x10.jpg 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/injection-molding-machine-diag-800x457-1-600x343.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption style=\"font-size:0.78em; color:#888; font-style:italic; margin-top:4px; text-align:center;\">Spritzgie\u00dfmaschinen-Diagramm f\u00fcr POM<\/figcaption><\/figure>\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;\">\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Parameter<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Homopolymer POM<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Copolymer POM<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Anmerkungen<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Barrel Temp (rear)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">180\u2013190\u00b0C<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">175\u2013185\u00b0C<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Avoid exceeding 220\u00b0C<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Barrel Temp (middle)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">190\u2013200\u00b0C<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">185\u2013195\u00b0C<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Gradual increase<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Barrel Temp (front)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">200\u2013210\u00b0C<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">190\u2013205\u00b0C<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Nozzle 5\u00b0C lower<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Temperatur der Form<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">80\u2013120\u00b0C<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">80\u2013110\u00b0C<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Higher = better crystallinity<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Einspritzdruck<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">80\u2013120 MPa<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">70\u2013110 MPa<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Adjust for wall thickness<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Haltedruck<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">50\u201380% of injection<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">50\u201375% of injection<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Critical for shrinkage<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Einspritzgeschwindigkeit<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Mittel<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Medium to medium-high<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Too fast causes off-gassing<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Gegendruck<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">5\u201315 MPa<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">5\u201310 MPa<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Minimize residence time<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Abk\u00fchlungszeit<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">15\u201340s<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">15\u201335s<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Depends on wall thickness<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Drying<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">80\u00b0C \/ 2\u20134h<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">80\u00b0C \/ 2\u20134h<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Recommended, not critical<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>In our experience, the most common mistake with POM is overheating. When POM degrades thermally, it releases formaldehyde gas, which causes bubbles, splay marks, and a pungent smell. We keep barrel temperatures strictly below 220\u00b0C and minimize residence time in the barrel to under 5 minutes.<\/p>\n<div class=\"factory-insight\" style=\"background:#f0f7ff;border-left:4px solid #0066cc;padding:12px 16px;margin:1.5em 0;\"><strong>\ud83c\udfed ZetarMold Factory Insight<\/strong><br \/>In unserer Fabrik in Shanghai betreiben wir 47 Spritzgie\u00dfmaschinen von 90T bis 1850T, verarbeiten \u00fcber 400 Materialien, einschlie\u00dflich verschiedener POM-Typen. Diese Maschinenauswahl erm\u00f6glicht es uns, POM-Bauteile von kleinen Pr\u00e4zisionszahnr\u00e4dern bis zu gro\u00dfen Automobilkomponenten zu formen.<\/div>\n<p>Mold temperature plays a crucial role in POM part quality. We typically run molds at 90\u2013100\u00b0C for most parts. Higher mold temperatures (up to 120\u00b0C) improve crystallinity, surface finish, and dimensional stability, but extend cycle time. For gears and precision components, we always go higher.<\/p>\n<h2>What Are Common POM Injection Molding Defects and How to Solve Them?<\/h2>\n<p>Die h\u00e4ufigsten POM-Fehler sind Sinkstellen, Verzug, Porosit\u00e4t in der Mitte und Spritzer \u2013 sie k\u00f6nnen durch Kontrolle von Temperatur und Druck vermieden werden. Unten finden Sie gezielte L\u00f6sungen.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;\">\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Defekt<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Verhindert Einfallstellen auf der gegen\u00fcberliegenden Oberfl\u00e4che<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">L\u00f6sung<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Sinkende Markierungen<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Insufficient holding pressure; thick sections<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Increase holding pressure\/time; reduce wall thickness; add coring<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Verzug<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Uneven cooling; differential shrinkage<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Uniform wall thickness; optimize cooling channels; adjust mold temp<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Centerline Porosity<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Thick walls; insufficient packing (homopolymer)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Use copolymer POM; increase holding pressure; reduce wall thickness<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Splay\/Silver Streaks<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Moisture; thermal degradation<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Pre-dry material; lower barrel temp; reduce residence time<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Formaldehyde Off-gassing<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Overheating above 220\u00b0C<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Reduce barrel temperature; minimize residence time; purge regularly<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Brittle Parts<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Over-crystallization; contamination<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Reduce mold temperature; check material purity<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Blitzlicht<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Excessive injection pressure; worn mold<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Reduce pressure; repair mold parting surfaces<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ein POM-spezifischer Fehler, den wir genau beobachten, ist Porosit\u00e4t entlang der Mittellinie. Dies tritt haupts\u00e4chlich bei Homopolymer-POM-Teilen mit gro\u00dfen Wandst\u00e4rken auf. Die \u00e4u\u00dfere Schicht erstarrt und kristallisiert, w\u00e4hrend der Kern noch geschmolzen ist, und wenn der Kern schrumpft, zieht er sich von sich selbst weg, was zu inneren Hohlr\u00e4umen f\u00fchrt. Der Wechsel zu Copolymer-POM oder eine Neukonstruktion mit ausgeh\u00f6hlten Bereichen beseitigt dieses Problem in den meisten F\u00e4llen.<\/p>\n<figure style=\"text-align:center;margin:2em 0;\">\n<img decoding=\"async\" width=\"800\" height=\"457\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-guide.webp\" alt=\"Visual guide to common injection molding defects\" class=\"wp-image-51585 size-full\" style=\"max-width:100%;height:auto;\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-guide.webp 800w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-guide-300x171.webp 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-guide-768x439.webp 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-guide-18x10.webp 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-guide-600x343.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption style=\"font-size:0.78em; color:#888; font-style:italic; margin-top:4px; text-align:center;\">Visuelle \u00dcbersicht zu Spritzgie\u00dffehlern<\/figcaption><\/figure>\n<h2>What Applications Rely on POM Injection Molded Parts?<\/h2>\n<p>POM injection molded parts are found in virtually every industry that demands precision, durability, and low friction. The material\u2019s unique combination of properties makes it irreplaceable in many applications.<\/p>\n<p><strong>Automotive (40% of POM consumption):<\/strong> Fuel system components (fuel sender units, fuel caps), seat belt mechanisms, door lock systems, window regulator gears, HVAC actuator gears, and interior trim clips. We\u2019ve produced fuel rail clips for a major German OEM running 500,000+ cycles without a single failure.<\/p>\n<p><strong>Unterhaltungselektronik:<\/strong> Keyboard mechanisms, printer gears, fan bearings, zipper sliders, and pen mechanisms. POM\u2019s snap-fit capability and spring-back properties make it perfect for clips and latches in electronic devices.<\/p>\n<p><strong>Industrial:<\/strong> Conveyor chain links, pump impellers, valve bodies, bearing bushings, and spring elements. POM\u2019s fatigue resistance handles millions of load cycles in industrial automation equipment.<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201eDie nat\u00fcrliche Gleitf\u00e4higkeit von POM macht es zu einem der besten Kunststoffe f\u00fcr Zahnr\u00e4der und Lager, die ohne externe Schmierung laufen.\u201c<\/b><span class=\"claim-true-or-false\">Wahr<\/span><\/p>\n<p class=\"claim-explanation\">POM has a coefficient of friction of 0.20\u20130.35, one of the lowest among engineering plastics. POM-on-POM and POM-on-metal contact surfaces perform well without lubrication, making it the material of choice for self-lubricating gears, bearings, and sliding mechanisms.<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201ePOM ist eine ausgezeichnete Wahl f\u00fcr Au\u00dfenanwendungen, da es eine hervorragende UV-Best\u00e4ndigkeit aufweist.\u201c<\/b><span class=\"claim-true-or-false\">Falsch<\/span><\/p>\n<p class=\"claim-explanation\">POM has poor UV resistance and degrades when exposed to prolonged sunlight. Outdoor POM parts require UV stabilizer additives or protective coatings. For purely outdoor applications, materials like ASA or UV-stabilized ABS are better choices.<\/p>\n<\/div>\n<p><strong>Medizinische Ger\u00e4te:<\/strong> Inhaler mechanisms, insulin pen components, and surgical instrument handles. Medical-grade POM (FDA-compliant copolymer) provides the precision and chemical resistance needed in healthcare.<\/p>\n<p><strong>Plumbing and Hardware:<\/strong> Faucet cartridges, valve stems, tap handles, and pipe fittings. POM\u2019s resistance to hot water (up to 80\u00b0C continuous) and cleaning chemicals makes it ideal for plumbing applications.<\/p>\n<h2>How Should You Design Parts for POM Injection Molding?<\/h2>\n<p>Die wichtigsten Konstruktionsregeln f\u00fcr POM-Teile sind gleichm\u00e4\u00dfige 1,0\u20133,5 mm dicke W\u00e4nde, 0,5\u00b0\u20131,5\u00b0 Schr\u00e4gung pro Seite und ein Rippen-zu-Wand-Verh\u00e4ltnis von 50\u201360 %, um die Schrumpfung von 1,8\u20132,5 % zu beherrschen. <a href=\"https:\/\/zetarmold.com\/de\/injection-mold-complete-guide\/\">Spritzgussform<\/a>.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;\">\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Design Parameter<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Empfohlener Wert<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Why It Matters<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Wanddicke<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">1.0\u20133.5 mm (uniform)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Prevents sink marks and centerline porosity<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Tiefgangswinkel<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">0.5\u00b0\u20131.5\u00b0 per side<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">POM shrinks onto cores; needs more draft than ABS<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Rib Thickness<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">50\u201360% of wall<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Prevents sink marks on opposite surface<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Rippenh\u00f6he<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Technische Thermoplaste bezeichnen eine Kategorie von Kunststoffen, die im Vergleich zu Standardkunststoffen \u00fcber \u00fcberlegene mechanische und thermische Eigenschaften verf\u00fcgen und sich f\u00fcr strukturelle und pr\u00e4zise Anwendungen eignen, die Festigkeit, Hitzebest\u00e4ndigkeit und Ma\u00dfhaltigkeit erfordern.<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Taller ribs are hard to fill and eject<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Corner Radius<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">\u2265 0.5 mm (0.25\u00d7 wall)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Sharp corners cause stress concentration<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Boss OD<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">2\u00d7 screw diameter<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Prevents cracking during screw insertion<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Snap-Fit Strain<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">\u2264 4% (single use), \u2264 2% (repeated)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">POM\u2019s fatigue limit for living hinges<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Shrinkage Allowance<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">1.8\u20132.5% (flow), 1.6\u20132.0% (cross-flow)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Anisotropic shrinkage requires directional compensation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"text-align:center;margin:2em 0;\">\n<img decoding=\"async\" width=\"800\" height=\"457\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/plastic-injection-molding-machine-diagram.webp\" alt=\"Diagram of a plastic injection molding machine\" class=\"wp-image-51528 size-full\" style=\"max-width:100%;height:auto;\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/plastic-injection-molding-machine-diagram.webp 800w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/plastic-injection-molding-machine-diagram-300x171.webp 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/plastic-injection-molding-machine-diagram-768x439.webp 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/plastic-injection-molding-machine-diagram-18x10.webp 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/plastic-injection-molding-machine-diagram-600x343.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption style=\"font-size:0.78em; color:#888; font-style:italic; margin-top:4px; text-align:center;\">Plastic injection molding machine diagram<\/figcaption><\/figure>\n<p>In unseren Design-Reviews ist das h\u00e4ufigste Problem bei POM-Teilen eine ungleichm\u00e4\u00dfige Wandst\u00e4rke. Wenn dicke und d\u00fcnne Bereiche aufeinandertreffen, k\u00fchlt der dicke Bereich langsamer ab, was zu unterschiedlicher Schrumpfung f\u00fchrt, die Verzug und Einfallstellen verursacht. Wir empfehlen immer, dicke Bereiche auszuh\u00f6hlen und die Wandst\u00e4rke \u00fcber das gesamte Teil innerhalb einer Variation von \u00b110 % zu halten.<\/p>\n<p>POM is one of the best plastics for snap-fits and living hinges due to its excellent spring-back properties. However, we recommend limiting strain to 4% for single-use snaps and 2% for repeated assembly\/disassembly. For gear teeth, we apply 0.02\u20130.04 mm per tooth profile compensation for shrinkage to hit AGMA quality grades.<\/p>\n<h2>How Does Mold Design Affect POM Part Quality?<\/h2>\n<p>Die wichtigsten Werkzeugkonstruktionsfaktoren f\u00fcr POM sind Angussplatzierung, gleichm\u00e4\u00dfige K\u00fchlung und Entl\u00fcftung. Die hohe Schrumpfung und Formaldehydabgabe von POM machen eine pr\u00e4zise Werkzeugkonstruktion unerl\u00e4sslich.<\/p>\n<p><strong>Tor-Design:<\/strong> We prefer sub-gate or pin-gate designs for POM parts because they allow automatic degating and leave minimal witness marks. For gears, diaphragm gates provide the most uniform fill and minimize weld lines in the tooth area. Gate size should be 50\u201370% of wall thickness.<\/p>\n<p><strong>K\u00fchlsystem:<\/strong> Uniform cooling is critical for POM. Temperature variation across the mold surface should stay within \u00b15\u00b0C. We use conformal cooling channels for complex geometries and beryllium copper inserts for areas that need faster heat extraction. For gears, we often use circular cooling channels that follow the gear profile.<\/p>\n<p><strong>Entl\u00fcftung:<\/strong> POM setzt bei der Verarbeitung Formaldehydgas frei, daher ist eine ausreichende Entl\u00fcftung unerl\u00e4sslich. Die Entl\u00fcftungstiefe sollte 0,01\u20130,02 mm betragen (POM hat eine niedrige Viskosit\u00e4t und flie\u00dft bei tieferen Entl\u00fcftungen aus). Wir platzieren Entl\u00fcftungen an jeder Schwei\u00dfnahtstelle und in den durch Flie\u00dfsimulation identifizierten zuletzt gef\u00fcllten Bereichen.<\/p>\n<p><strong>Rauswurf:<\/strong> POM\u2019s high shrinkage means parts grip tightly onto cores. We design generous draft angles (0.5\u00b0\u20131.5\u00b0), use multiple ejector pins distributed evenly, and sometimes apply mold release coatings to core surfaces. For deep-draw parts, air-assisted ejection prevents vacuum lock.<\/p>\n<h2>Frequently Asked Questions About POM Injection Molding<\/h2>\n<h3>Can POM be painted or plated?<\/h3>\n<p>POM has very low surface energy, making it difficult to paint or plate without surface treatment. Flame treatment, plasma treatment, or chemical etching can improve adhesion. However, for decorative parts, we usually recommend switching to ABS or PC\/ABS, which accept paint and plating much more readily.<\/p>\n<h3>What is the difference between POM homopolymer and copolymer?<\/h3>\n<p>Homopolymer POM (like Delrin) offers 5\u201310% higher mechanical strength and stiffness but is more prone to centerline porosity in thick sections and has a narrower processing window. Copolymer POM (like Celcon or Ultraform) processes more easily, has better chemical resistance, and is less likely to degrade thermally. For most applications, we recommend copolymer.<\/p>\n<h3>Does POM need to be dried before molding?<\/h3>\n<p>POM\u2019s low moisture absorption (0.20%) means drying is recommended but not strictly required for most applications. We pre-dry at 80\u00b0C for 2\u20134 hours as standard practice to ensure optimal surface quality. For critical cosmetic parts, drying is essential.<\/p>\n<h3>Is POM FDA-approved for food contact?<\/h3>\n<p>Yes, certain copolymer POM grades (such as Celcon M90 and Hostaform C9021) are FDA-compliant for food contact applications. Always verify the specific grade\u2019s FDA status with the resin supplier before production.<\/p>\n<h3>What causes the white residue on POM mold surfaces?<\/h3>\n<p>The white deposit is formaldehyde and trioxane oligomers released during POM processing. Regular mold cleaning (every 4\u20138 hours of production), adequate venting, and keeping barrel temperatures below 215\u00b0C minimize this buildup. Some shops use mold-cleaning compounds designed specifically for POM residue.<\/p>\n<h3>How does POM compare to nylon for gear applications?<\/h3>\n<p>POM is generally preferred over nylon for gears because it has lower moisture absorption (0.2% vs. 2.5%), better dimensional stability, lower coefficient of friction, and more consistent mechanical properties across humidity ranges. Nylon offers higher impact strength and better high-temperature performance. For gears running in wet or humid environments, POM is the clear winner.<\/p>\n<h2>What Are the Key Takeaways for POM Injection Molding?<\/h2>\n<p>POM injection molding is a proven manufacturing process for producing high-precision, low-friction, and dimensionally stable plastic parts. Whether you\u2019re designing gears for an automotive transmission or clips for consumer electronics, POM delivers the mechanical performance of metal at a fraction of the cost and weight. The keys to success are controlling processing temperatures below 220\u00b0C, designing for uniform wall thickness to manage 1.8\u20132.5% shrinkage, and ensuring adequate mold venting to handle formaldehyde off-gassing.<\/p>\n<p>Bei ZetarMold verarbeiten wir POM seit \u00fcber 20 Jahren in Automobil-, Industrie- und Konsumanwendungen. Unser Team \u00fcbernimmt alles von DFM-Reviews und Werkzeugkonstruktion bis hin zur Serienfertigung und Qualit\u00e4tskontrolle. Wenn Sie an einem Projekt arbeiten, das POM-Spritzgussteile ben\u00f6tigt, wenden Sie sich an unser Engineering-Team f\u00fcr eine kostenlose DFM-Pr\u00fcfung und ein Angebot. In unserem Komplettleitfaden zum Spritzgie\u00dfen finden Sie einen umfassenden \u00dcberblick.<\/p>\n<p>Angebot f\u00fcr Ihr Spritzgie\u00dfprojekt anfordern<\/p>\n<p>Get competitive pricing, DFM feedback, and production timeline from ZetarMold\u2019s engineering team.<\/p>\n<p>Request a Free Quote \u2192<\/p>\n<figure style=\"text-align:center;margin:2em 0;\">\n<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"457\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-examples.webp\" alt=\"Injection molding defects and examples overview\" class=\"wp-image-51587 size-full\" style=\"max-width:100%;height:auto;\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-examples.webp 800w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-examples-300x171.webp 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-examples-768x439.webp 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-examples-18x10.webp 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2025\/11\/injection-molding-defects-examples-600x343.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption style=\"font-size:0.78em; color:#888; font-style:italic; margin-top:4px; text-align:center;\">\u00dcbersicht \u00fcber h\u00e4ufige Spritzgie\u00dffehler relevant<\/figcaption><\/figure>\n<hr style=\"margin:2em 0;border:none;border-top:1px solid #e0e0e0;\" \/>\n<ol class=\"footnotes\">\n<li id=\"fn:1\">\n<p><strong>engineering thermoplastic<\/strong>: Technischer Thermoplast bezeichnet eine Kategorie von Kunststoffmaterialien, die im Vergleich zu Standardkunststoffen \u00fcberlegene mechanische und thermische Eigenschaften bieten und f\u00fcr strukturelle und Pr\u00e4zisionsanwendungen geeignet sind. <a href=\"#fnref1:1\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<li id=\"fn:2\">\n<p><strong>creep resistance<\/strong>: Kriechbest\u00e4ndigkeit ist die F\u00e4higkeit eines Materials, einer allm\u00e4hlichen Verformung unter dauerhafter mechanischer Belastung \u00fcber die Zeit zu widerstehen, was f\u00fcr lasttragende Bauteile entscheidend ist. <a href=\"#fnref1:2\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<li id=\"fn:3\">\n<p><strong>Schrumpfung<\/strong>: POM-Schwindung bezeichnet die volumetrische Reduktion von 1,8 bis 2,5 Prozent, die auftritt, wenn geschmolzenes POM im Werkzeughohlraum abk\u00fchlt und fest wird. <a href=\"#fnref1:3\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"<p>Was ist POM-Spritzguss und warum wird er so h\u00e4ufig verwendet? Wichtige Erkenntnisse POM (Polyoxymethylen) ist ein technischer Thermoplast mit geringer Reibung und hoher Steifigkeit, ideal f\u00fcr Pr\u00e4zisionsteile. Homopolymer-POM bietet h\u00f6here Festigkeit; Copolymer-POM l\u00e4sst sich leichter verarbeiten und hat eine bessere thermische Stabilit\u00e4t. Halten Sie die Zylindertemperaturen unter 220\u00b0C, um Formaldehyd-Ausgasungen und Teiledefekte zu vermeiden. Konstruieren Sie f\u00fcr eine gleichm\u00e4\u00dfige Wandst\u00e4rke von 1,0\u20133,5 [\u2026]<\/p>","protected":false},"author":1,"featured_media":49302,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"POM Injection Molding: Complete Guide to Acetal Molding","_seopress_titles_desc":"Learn everything about POM injection molding \u2014 processing parameters, part design, mold design, defects, and applications. Expert tips from ZetarMold.","_seopress_robots_index":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[42,45],"tags":[88,48,661],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/posts\/52106"}],"collection":[{"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/comments?post=52106"}],"version-history":[{"count":0,"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/posts\/52106\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/media\/49302"}],"wp:attachment":[{"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/media?parent=52106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/categories?post=52106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zetarmold.com\/de\/wp-json\/wp\/v2\/tags?post=52106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}