Our Polyoxymethylene POM Injection Molding Services

Elevate your high-performance production with Yigu Technology’s premium Polyoxymethylen (Pom) Injektionsformdienste—where precision meets durability. Leveraging our injection molding expertise, advanced machinery, and custom tooling, we deliver POM parts that excel in low friction, hohe Steifheit, and dimensional stability—perfect for automotive, industriell, Elektronik, and consumer applications demanding reliable, long-lasting components.​

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Was ist Polyoxymethylen (Pom) Injektionsformung?

Polyoxymethylen (Pom), commonly known as acetal resin, is a high-performance engineering thermoplastic renowned for its exceptional mechanical properties and low friction. Derived from formaldehyde monomers (either homopolymers or copolymers), POM’s linear molecular structure gives it a unique combination of strength, Steifheit, and wear resistance that mimics metal. Injektionsformung is a manufacturing process that melts POM pellets, injiziert das geschmolzene Material in einen benutzerdefinierten Schimmelpilzhöhle, cools it to solidify, und schlägt den fertigen Teil aus. Zusammen, POM injection molding produces robust, precision-engineered components ideal for moving parts, Getriebe, and other applications where low friction and dimensional consistency are critical.​

Schlüsseldefinitionen & Core Concepts​

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Material Properties of POM​

POM’s unique properties set it apart as a top choice for engineering applications, often replacing metal (Z.B., Messing, Stahl) to reduce weight and cost:​

• Hohe Stärke: Tensile strength of 60–70 MPa (POM homopolymer: 70 MPA; Copolymer: 60 MPA)—stronger than ABS (40 MPA) and comparable to some metals.​

• Geringe Reibung: Coefficient of friction (0.15–0.30) similar to Teflon but with higher wear resistance—ideal for parts that slide or rotate.​

• Hohe Steifheit: Flexural modulus of 2.5–3.5 GPa—retains shape under load (critical for structural parts like gears or hinges).​

• Dimensionsstabilität: Niedriger Koeffizient der thermischen Expansion (CTE: 8–12 × 10⁻⁵/°C) und minimale Feuchtigkeitsabsorption (0.2–0,5%)—ensures parts fit consistently in tight assemblies.​

Chemischer Widerstand: Öle resistent, Fetten, Lösungsmittel, und die meisten Haushaltschemikalien (except strong acids/bases like nitric acid).

Unsere Fähigkeiten: Delivering High-Performance POM Injection Molding

Bei Yigu Technology, we specialize in POM injection molding—our capabilities are tailored to handle POM’s unique processing challenges (Feuchtigkeitsempfindlichkeit, high crystallinity) and deliver parts that meet the strictest industry standards (Z.B., ISO 9001 für Automobile, FDA für Medizinprodukte).​

Kernfunktionen Aufschlüsselung

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The POM Injection Molding Process: Step-by-Step Precision

POM’s unique characteristics—high crystallinity, Feuchtigkeitsempfindlichkeit, and fast cooling rate—require a specialized, optimized process to maintain strength, geringe Reibung, und dimensionale Stabilität. Our workflow minimizes defects and maximizes performance, whether you’re producing 50 gear prototypes or 500,000 automotive hinges.​

Schritt 1: Materialvorbereitung (Critical for POM)​

POM absorbs moisture rapidly (bis zu 0.5% In 24 Stunden bei 50% Luftfeuchtigkeit), was verursacht hydrolytic degradation (knacken, Sprödigkeit, or reduced strength) during molding. Our preparation process eliminates this risk:​

• Trocknen: POM pellets are dried in dehumidifying dryers at 80–100°C for 3–4 hours (homopolymer: 90°C/4hrs; Copolymer: 80°C/3hrs) to reduce moisture content to <0.05%.​

• Additive/Filler Blending: Mix dried pellets with Zusatzstoffe (UV -Stabilisatoren für den Gebrauch im Freien, lubricants to enhance low friction) oder Füllstoffe (glass fiber for extra strength, carbon fiber for conductivity—note: fillers increase stiffness but may reduce friction performance).​

• Lagerung: Dried pellets are stored in sealed, heated hoppers (50–60 ° C.) to prevent reabsorbing moisture before molding.​

Schritt 2: Schimmeldesign (Optimized for POM)​

POM’s high crystallinity (60–80 %) and fast cooling rate cause significant shrinkage (1.5–3,0%)—mold design must account for this to avoid warping or dimensional errors:​

• Schrumpfungsausgleich: Molds are sized 1.5–3.0% larger than the final part (homopolymer: 2.5–3.0% shrinkage; Copolymer: 1.5–2,0%).​

• Kühlsysteme: Uniform water-cooling channels (spaced 15–25mm apart) to prevent uneven cooling (das verursacht Verzerrungen); mold temperature maintained at 40–80°C (higher temp = slower cooling = reduced internal stress).​

• Teilentwurfsunterstützung: We advise on adding draft angles (1–2 °) and fillets (0.5–1mm) to POM parts—prevents cracking during ejection and improves mold filling.​

Schritt 3: Injektionsparameter (Tailored to POM Grades)​

POM’s narrow melting range (160–180°C for copolymer; 175–185°C for homopolymer) requires precise parameter tuning to avoid degradation (vergilbt) or incomplete filling. Below are standard settings for two common grades:​

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Schritt 4: Nachbereitungsvorgänge

Nach dem Ermachung, POM parts may undergo:​

• Trimmen: Entfernen von überschüssigem Kunststoff (Blitz) with sharp, low-friction tools (to avoid scratching POM’s surface—critical for low-friction parts like bearings).​

• Glühen: Heating parts to 120–140°C for 1–2 hours, dann langsam abkühlen (10–15°C/hour) Inneren Stress reduzieren (prevents cracking in high-stress applications like automotive gears).​

• Oberflächenbehandlung: Applying coatings, Texturierung, or printing (Siehe Abschnitt 5 für Details).​

• Inspektion: QC checks for:​

• Dimensionsgenauigkeit: Laser measurement (±0.002mm tolerance) to ensure parts fit in assemblies.​

• Friction Performance: Taber abrasion testing (wear rate: <10 mg/1,000 cycles for general-purpose POM).​

Stärke: Zugprüfung (ASTM D638) to verify strength meets specs (≥60 MPa for copolymer).

Materialien: Choosing the Right POM Grade for Your Project

Not all POM is the same—each grade (homopolymer, Copolymer, verstärkt) is tailored to specific applications, balancing strength, Flexibilität, und Kosten. Selecting the right grade ensures your parts meet performance, regulatorisch, and design goals.​

Common POM Types for Injection Molding​

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Tipps zur Materialauswahl

1. Prioritize strength vs. Flexibilität: For high-stress moving parts (Getriebe), choose POM homopolymer; for parts prone to impact (Türscharniere), pick copolymer.​

2. Consider environmental exposure: Für den Außengebrauch, select UV-stabilized POM; for chemical-rich environments (Industriemaschinerie), use standard copolymer (better chemical resistance than homopolymer).​

Nachhaltigkeit umarmen: Our rPOM is ideal for brands focused on eco-friendly practices—use it for non-critical parts (Z.B., Spielzeuggänge) to cut costs and reduce environmental impact.

Oberflächenbehandlung: Enhancing POM’s Function & Ästhetik

POM’s natural surface is smooth (supports its low-friction properties) kann aber geändert werden, um den Griff zu verbessern, Haltbarkeit, or branding—without compromising its core performance. We offer five core treatments tailored to POM:​

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Vorteile: Why Choose POM Injection Molding?

POM injection molding offers unmatched benefits for engineering applications requiring a blend of strength, geringe Reibung, and dimensional stability—often replacing metal to reduce weight, kosten, and maintenance.​

Key Advantages of POM Injection Molding​

• Hohe Stärke & Steifheit: Stronger than most plastics (ABS, Pp) and comparable to brass (Zugfestigkeit: 60–70 MPa vs. brass’s 70–80 MPa)—ideal for structural parts that replace metal.​

• Geringe Reibung & Resistenz tragen: Coefficient of friction (0.15–0.30) and wear rate ( <10 mg/1,000 cycles) make POM parts last 3–5x longer than ABS or PP in moving applications (Z.B., Getriebe).​

• Dimensionsstabilität: Minimal moisture absorption (0.2–0,5%) and low thermal expansion (8–12 × 10⁻⁵/°C)—ensures parts fit consistently in tight assemblies (Z.B., elektronische Anschlüsse, Automobilsensoren).​

• Kosteneffizienz: Cheaper than metal (Pom: ​3.50–5.00/kg vs. Messing: ​8.00–12.00/kg) and requires less post-processing (no machining like metal parts); injection molding drives unit costs down to ​0.15–0.80 per part.​

• Chemischer Widerstand: Widersteht den Ölen, Fetten, and solvents—ideal for parts exposed to harsh fluids (Z.B., Kfz -Motorkomponenten, Industriemaschinerie).​

POM vs. Other Engineering Plastics & Metall

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Anwendungsbranche: Where POM Injection Molding Excels

POM’s unique blend of low friction, hohe Stärke, and dimensional stability makes it indispensable in engineering-focused industries—often replacing metal to cut costs and weight while maintaining performance. Im Folgenden finden Sie reale Anwendungsfälle und unsere maßgeschneiderten Lösungen:​

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Fallstudien: Our POM Injection Molding Success Stories

We’ve helped clients across industries solve complex challenges with POM injection molding—delivering parts that replace metal, reduce maintenance, und die Leistung verbessern. Im Folgenden finden Sie drei herausragende Projekte:​

Fallstudie 1: POM Copolymer Automotive Door Hinges​

• Herausforderung: Ein führender Autohersteller benötigte 500,000 door hinges that were lightweight (Verbesserung der Kraftstoffeffizienz), wirkungsbeständig (standhalten 100,000+ door openings), und kostengünstig (to replace brass hinges). Their previous brass hinges were heavy (adding 0.5kg per car) and prone to rust.​

• Lösung: Wir haben empfohlen POM copolymer for its balance of flexibility (Schlagfestigkeit: 10 KJ /) und Stärke. Our custom molds included shrinkage compensation (2.0% for copolymer) and uniform cooling channels to prevent warping. We added a minor texturing to the hinge surfaces to reduce friction and improve wear resistance.​

• Ergebnisse: The POM hinges were 60% lighter than brass (reducing per-car weight by 0.3kg and improving fuel efficiency by 1.5%) und Kosten 40% weniger. They passed 150,000 door-opening tests with no cracks or deformation, and showed no signs of wear after 3 years of real-world use. The automaker expanded their order to 1 million hinges/year for all their sedan models.​

Fallstudie 2: POM Homopolymer Industrial Conveyor Gears​

• Herausforderung: A logistics company needed 10,000 conveyor gears that could withstand 24/7 Betrieb, resist lubricating oil, and have low friction (to reduce energy use). Their previous ABS gears failed after 3 months due to high wear and poor oil resistance.​

• Lösung: Wir haben benutzt POM homopolymer for its exceptional wear resistance (Taber wear rate: <5 mg/1,000 cycles) and oil resistance. Our molds were polished to Ra 0.1 μm (to enhance low-friction properties) and included optimized gating to ensure full filling of the gear teeth. Post-molding, we annealed the gears at 130°C for 1 hour to reduce internal stress.​

• Ergebnisse: The POM homopolymer gears lasted 18 Monate (6x longer than ABS) and reduced conveyor energy use by 8% (due to lower friction). They showed no swelling or degradation after 12 months of exposure to lubricating oil, and the client now uses our POM gears for all their global conveyor systems—saving $200,000/year in replacement costs.​

Fallstudie 3: FDA-Compliant POM Copolymer Syringe Plungers​

• Herausforderung: Ein Unternehmen für medizinische Geräte benötigte 200,000 syringe plungers that were biocompatible (trifft ISO 10993), glatt (to ensure precise fluid control), and sterilizable (via autoclaving). Their previous PP plungers were too flexible, causing inconsistent fluid delivery.​

• Lösung: Wir haben ausgewählt FDA-compliant POM copolymer (meets USP Class VI standards) for its stiffness (flexural modulus: 2.8 GPA) und glatte Oberfläche. Our molds had mirror-polished cavities (Ra 0.05 μm) to ensure plunger smoothness, and we optimized injection parameters (170°C barrel temp, 90 MPA -Druck) um Oberflächenfehler zu vermeiden. Post-molding, we performed 100% Dimensionalprüfungen (±0.002mm tolerance) to ensure consistent fit in syringes.​

Ergebnisse: The POM plungers provided 30% more precise fluid control than PP (per clinical tests) und bestanden 50+ Autoklavenzyklen (121° C) with no warping. They met all ISO 10993 Biokompatibilitätsstandards, and the client expanded our partnership to produce plungers for their entire line of insulin and vaccine syringes.

Why Choose Us for Your POM Injection Molding Needs?

With countless injection molding suppliers offering POM services, Yigu Technology stands out for our deep specialization in POM, uncompromising quality, and ability to solve engineering challenges. Here’s why leading brands in automotive, industriell, and medical sectors trust us:​

1. Specialized POM Expertise​

We don’t just mold plastics—we specialize in Polyoxymethylene (Pom). Unsere Ingenieure haben 15+ years of experience optimizing processes for POM’s unique traits:​

• Moisture sensitivity: Proprietary drying protocols (Zu <0.05% Feuchtigkeit) that eliminate cracking and brittleness.​

• Shrinkage control: Mold design techniques (shrinkage compensation, gleichmäßige Kühlung) that ensure dimensional accuracy (± 0,002 mm).​

• Low-friction optimization: Mold polishing (Ra 0.1–0.2 μm) and coating solutions that enhance POM’s natural low-friction properties.​

We’ve worked with every POM grade (homopolymer, Copolymer, glasgefüllt, recycelt) and know how to tailor solutions for metal replacement, Hochverriegelung, or precision applications.​

2. Rigorous Quality Assurance​

Quality is critical for POM parts—especially those replacing metal or used in safety-critical applications. Wir halten ISO 9001 (Allgemeine Fertigung) Und ISO 13485 (Herstellung von medizinischen Geräten) Zertifizierungen, mit a 99.6% defect-free rate for POM components. Our quality checks include:​

• Pre-molding: Moisture testing (Karl Fischer titration) to ensure POM pellets are dry (<0.05%).​

• In-molding: Real-time laser measurement for dimensional accuracy and vision inspection for surface defects (Kratzer, Blitz).​

• Post-molding:​

• Tragen Sie Tests (Taber abrasion) for moving parts (Getriebe, Lager).​

• Zugprüfung (ASTM D638) Stärke überprüfen (≥60 MPa for copolymer).​

• Regulatory compliance (FDA 21 CFR 177.2470 for food/medical POM; UL94 V0 for flame-retardant POM).​

3. Customer-Focused Service​

We treat your project as a partnership—our goal is to solve your problems, not just deliver parts. From day one, you’ll work with a dedicated account manager who:​

• Provides free material/design consultations (Z.B., helping you choose between POM homopolymer and copolymer for metal replacement).​

• Shares 3D mold designs and sample parts (innerhalb 4 Tage) for approval before full production.​

• Offers flexible lead times: 3–5 Tage für Prototypen (Aluminiumformen), 2–4 Wochen für hochvolumige Läufe (Stahlformen).​

• Bietet 24/7 support for urgent issues (Z.B., expediting parts for broken industrial machinery).​

4. Innovative Lösungen

Wir investieren 7% unserer jährlichen Einnahmen in R.&D to push the boundaries of POM injection molding. Recent innovations include:​

• Metal-Replacement POM Blends: A proprietary mix of POM homopolymer and glass fiber (POM-GF15) that matches 90% of brass’s strength at 50% the weight and cost.​

• Self-Lubricating POM: POM grades infused with solid lubricants (PTFE particles) that reduce friction by 30% vs. standard POM—ideal for oil-free applications (Z.B., food-processing machinery).​

• Fast-Cycle Molding: Custom cooling systems that cut POM cycle time by 20% (from 25s to 20s) without compromising quality—speeding up production for high-volume orders.​

5. Sustainable Practices​

We’re committed to reducing our environmental impact while delivering top-tier POM parts:​

• Recycled POM (rPOM): Wir beziehen 40% of our POM materials from post-industrial waste (Z.B., POM scrap from automotive manufacturing) and offer rPOM grades that cost 15–25% less than virgin POM.​

• Abfallreduzierung: We recycle 96% of production scrap (Blitz, defekte Teile) back into the molding process—sending only 4% to landfills.​

Energieeffizienz: Our injection molding machines use variable-frequency drives (VFDs) to reduce energy consumption by 22% vs. standard equipment—lowering our carbon footprint and your costs.

FAQ