Our Polyoxymethylene POM Injection Molding Services

Eleve su producción de alto rendimiento con la prima de Yigu Technology Polioximetileno (Pom) Injection Molding services—where precision meets durability. Aprovechando nuestra experiencia de moldeo por inyección, maquinaria avanzada, y herramientas personalizadas, we deliver POM parts that excel in low friction, rigidez, and dimensional stability—perfect for automotive, industrial, electrónica, and consumer applications demanding reliable, long-lasting components.​

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¿Qué es el polioximetileno? (Pom) Moldura de inyección?

Polioximetileno (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, rigidez, and wear resistance that mimics metal. Moldura de inyección is a manufacturing process that melts POM pellets, inyecta el material fundido en una cavidad de moho personalizado, lo enfría para solidificar, y expulsa la parte terminada. Juntos, POM injection molding produce robusto, precision-engineered components ideal for moving parts, engranaje, and other applications where low friction and dimensional consistency are critical.​

Definiciones clave & Conceptos centrales

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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 (P.EJ., latón, acero) to reduce weight and cost:​

• Alta fuerza: Tensile strength of 60–70 MPa (POM homopolymer: 70 MPA; copolímero: 60 MPA)—Stronger que ABS (40 MPA) y comparable a algunos metales.

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

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

• Estabilidad dimensional: Bajo coeficiente de expansión térmica (Cte: 8–12 × 10⁻⁵/°C) y absorción de humedad mínima (0.2–0.5%)—ensures parts fit consistently in tight assemblies.​

Resistencia química: Resistente a los aceites, grasas, solventes, y la mayoría de los productos químicos para el hogar (except strong acids/bases like nitric acid).

Nuestras capacidades: Delivering High-Performance POM Injection Molding

En la tecnología yigu, we specialize in POM injection molding—our capabilities are tailored to handle POM’s unique processing challenges (sensibilidad a la humedad, high crystallinity) and deliver parts that meet the strictest industry standards (P.EJ., ISO 9001 para automotriz, FDA para dispositivos médicos).​

Desglose de capacidades centrales

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The POM Injection Molding Process: Precisión paso a paso

POM’s unique characteristics—high crystallinity, sensibilidad a la humedad, and fast cooling rate—require a specialized, optimized process to maintain strength, baja fricción, y estabilidad dimensional. Nuestro flujo de trabajo minimiza los defectos y maximiza el rendimiento, si estás produciendo 50 gear prototypes or 500,000 automotive hinges.​

Paso 1: Preparación de material (Critical for POM)​

POM absorbs moisture rapidly (arriba a 0.5% en 24 horas a 50% humedad), Que causa hydrolytic degradation (agrietamiento, fragilidad, or reduced strength) during molding. Nuestro proceso de preparación elimina este riesgo:​

• El secado: POM pellets are dried in dehumidifying dryers at 80–100°C for 3–4 hours (homopolymer: 90° C/4hrs; copolímero: 80°C/3hrs) para reducir el contenido de humedad a <0.05%.​

• Mezcla de aditivos/relleno: Mezclar pellets secos con aditivos (Estabilizadores UV para uso al aire libre, lubricants to enhance low friction) o relleno (fibra de vidrio para fuerza adicional, carbon fiber for conductivity—note: fillers increase stiffness but may reduce friction performance).​

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

Paso 2: Diseño de moldes (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:​

• Compensación de contracción: Molds are sized 1.5–3.0% larger than the final part (homopolymer: 2.5–3.0% shrinkage; copolímero: 1.5–2.0%).​

• Sistemas de enfriamiento: Uniform water-cooling channels (spaced 15–25mm apart) to prevent uneven cooling (que causa deformación); mold temperature maintained at 40–80°C (higher temp = slower cooling = reduced internal stress).​

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

Paso 3: Parámetros de inyección (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 (amarillento) o relleno incompleto. A continuación se muestran configuraciones estándar para dos calificaciones comunes:​

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Paso 4: Operaciones posteriores al moldeo

Después de demoldar, POM parts may undergo:​

• Guarnición: Eliminar el exceso de plástico (destello) with sharp, low-friction tools (to avoid scratching POM’s surface—critical for low-friction parts like bearings).​

• Recocido: Heating parts to 120–140°C for 1–2 hours, Luego se enfría lentamente (10–15°C/hour) Para reducir el estrés interno (prevents cracking in high-stress applications like automotive gears).​

• Tratamiento superficial: Aplicando recubrimientos, textura, o impresión (Ver sección 5 para más detalles).​

• Inspección: QC checks for:​

• Precisión dimensional: Laser measurement (± 0.002 mm de tolerancia) to ensure parts fit in assemblies.​

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

Fortaleza: Prueba de tracción (ASTM D638) to verify strength meets specs (≥60 MPa for copolymer).

Materiales: Choosing the Right POM Grade for Your Project

Not all POM is the same—each grade (homopolymer, copolímero, reforzado) is tailored to specific applications, balancing strength, flexibilidad, y costo. Seleccionar la calificación correcta asegura que sus piezas cumplan con el rendimiento, regulador, and design goals.​

Common POM Types for Injection Molding​

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Material Selection Tips​

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

2. Consider environmental exposure: Para uso al aire libre, select UV-stabilized POM; for chemical-rich environments (maquinaria industrial), use standard copolymer (better chemical resistance than homopolymer).​

Abrazar la sostenibilidad: Our rPOM is ideal for brands focused on eco-friendly practices—use it for non-critical parts (P.EJ., engranajes de juguete) to cut costs and reduce environmental impact.

Tratamiento superficial: Enhancing POM’s Function & Estética

POM’s natural surface is smooth (supports its low-friction properties) but can be modified to improve grip, durabilidad, or branding—without compromising its core performance. We offer five core treatments tailored to POM:​

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Ventajas: Why Choose POM Injection Molding?

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

Key Advantages of POM Injection Molding​

• Alta fuerza & Rigidez: Stronger than most plastics (Abdominales, PÁGINAS) and comparable to brass (resistencia a la tracción: 60–70 MPa vs. brass’s 70–80 MPa)—ideal for structural parts that replace metal.​

• Baja fricción & Resistencia al desgaste: 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 (P.EJ., engranaje).​

• Estabilidad dimensional: Minimal moisture absorption (0.2–0.5%) and low thermal expansion (8–12 × 10⁻⁵/°C)—ensures parts fit consistently in tight assemblies (P.EJ., conectores electrónicos, sensores automotrices).​

• Rentabilidad: Cheaper than metal (Pom: ​3.50–5.00/kg vs. latón: ​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.​

• Resistencia química: Resiste los aceites, grasas, and solvents—ideal for parts exposed to harsh fluids (P.EJ., Componentes del motor automotriz, maquinaria industrial).​

POM vs. Other Engineering Plastics & Metal

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Industria de aplicaciones: Where POM Injection Molding Excels

POM’s unique blend of low friction, alta fuerza, and dimensional stability makes it indispensable in engineering-focused industries—often replacing metal to cut costs and weight while maintaining performance. A continuación se presentan casos de uso del mundo real y nuestras soluciones a medida:​

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Estudios de caso: 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, y mejorar el rendimiento. Below are three standout projects:​

Estudio de caso 1: POM Copolymer Automotive Door Hinges​

• Desafío: Se necesitaba un fabricante de automóviles líder 500,000 door hinges that were lightweight (Para mejorar la eficiencia del combustible), resistente al impacto (to withstand 100,000+ door openings), y rentable (to replace brass hinges). Their previous brass hinges were heavy (adding 0.5kg per car) and prone to rust.​

• Solución: Recomendamos POM copolymer for its balance of flexibility (resistencia al impacto: 10 KJ /) y fuerza. 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.​

• Resultados: The POM hinges were 60% lighter than brass (reducing per-car weight by 0.3kg and improving fuel efficiency by 1.5%) y costo 40% menos. Pasaron 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.​

Estudio de caso 2: POM Homopolymer Industrial Conveyor Gears​

• Desafío: A logistics company needed 10,000 conveyor gears that could withstand 24/7 operación, Resistir al aceite lubricante, and have low friction (to reduce energy use). Sus engranajes ABS anteriores fallaron después de 3 months due to high wear and poor oil resistance.​

• Solución: Usamos POM homopolymer for its exceptional wear resistance (Taber wear rate: <5 mg/1,000 cycles) y resistencia al aceite. 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.​

• Resultados: The POM homopolymer gears lasted 18 meses (6x más largo que los abdominales) 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.​

Estudio de caso 3: FDA-Compliant POM Copolymer Syringe Plungers​

• Desafío: Una empresa de dispositivos médicos necesitaba 200,000 syringe plungers that were biocompatible (se encuentra con ISO 10993), liso (to ensure precise fluid control), and sterilizable (via autoclaving). Their previous PP plungers were too flexible, causing inconsistent fluid delivery.​

• Solución: Seleccionamos FDA-compliant POM copolymer (meets USP Class VI standards) for its stiffness (flexural modulus: 2.8 GPA) y superficie lisa. Our molds had mirror-polished cavities (Real academia de bellas artes 0.05 μm) to ensure plunger smoothness, y optimizamos los parámetros de inyección (170°C barrel temp, 90 Presión de MPA) to avoid surface defects. Post-molding, we performed 100% controles dimensionales (± 0.002 mm de tolerancia) to ensure consistent fit in syringes.​

Resultados: The POM plungers provided 30% more precise fluid control than PP (per clinical tests) y pasado 50+ ciclos de autoclave (121° C) with no warping. They met all ISO 10993 Normas de biocompatibilidad, 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, industrial, and medical sectors trust us:​

1. Specialized POM Expertise​

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

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

• Shrinkage control: Mold design techniques (shrinkage compensation, enfriamiento del uniforme) 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, copolímero, lleno de vidrio, reciclado) and know how to tailor solutions for metal replacement, de pie alto, or precision applications.​

2. Garantía de calidad rigurosa

Quality is critical for POM parts—especially those replacing metal or used in safety-critical applications. Sostenemos ISO 9001 (fabricación general) y ISO 13485 (fabricación de dispositivos médicos) certificaciones, con un 99.6% defect-free rate for POM components. Nuestros controles de calidad incluyen:​

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

• En moldeo: Real-time laser measurement for dimensional accuracy and vision inspection for surface defects (arañazos, destello).​

• Post-molding:​

• Prueba de desgaste (Taber abrasion) for moving parts (engranaje, aspectos).​

• Prueba de tracción (ASTM D638) Para verificar la fuerza (≥60 MPa for copolymer).​

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

3. Servicio centrado en el cliente

We treat your project as a partnership—our goal is to solve your problems, not just deliver parts. Desde el primer día, Trabajará con un administrador de cuentas dedicado que:​

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

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

• Ofrece horarios de entrega flexibles: 3–5 días para prototipos (moldes de aluminio), 2–4 semanas para carreras de alto volumen (moldes de acero).​

• Brindar 24/7 support for urgent issues (P.EJ., expediting parts for broken industrial machinery).​

4. Soluciones innovadoras

Invertimos 7% de nuestros ingresos anuales en R&D to push the boundaries of POM injection molding. Las innovaciones recientes incluyen:​

• 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 (P.EJ., food-processing machinery).​

• Moldura de ciclo rápido: 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. Prácticas sostenibles

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

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

• Reducción de desechos: Recicamos 96% de chatarra de producción (destello, partes defectuosas) back into the molding process—sending only 4% a vertederos.

Eficiencia energética: Nuestras máquinas de moldeo por inyección utilizan unidades de frecuencia variable (VFDS) to reduce energy consumption by 22% VS. standard equipment—lowering our carbon footprint and your costs.

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