Our Polyoxymethylene POM Injection Molding Services

Elevate your high-performance production with Yigu Technology’s premium Полиоксиметилен (Пома) Injection Molding services—where precision meets durability. Leveraging our injection molding expertise, advanced machinery, and custom tooling, we deliver POM parts that excel in low friction, Высокая жесткость, and dimensional stability—perfect for automotive, промышленное, Электроника, and consumer applications demanding reliable, long-lasting components.​

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Что такое полиоксиметилен (Пома) Инъекционное формование?

Полиоксиметилен (Пома), 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, жесткость, and wear resistance that mimics metal. Инъекционное формование is a manufacturing process that melts POM pellets, injects the molten material into a custom mold cavity, cools it to solidify, and ejects the finished part. Вместе, POM injection molding produces robust, precision-engineered components ideal for moving parts, передачи, and other applications where low friction and dimensional consistency are critical.​

Key Definitions & 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 (НАПРИМЕР., латунь, сталь) to reduce weight and cost:​

• Высокая сила: Tensile strength of 60–70 MPa (POM homopolymer: 70 МПА; сополимер: 60 МПА)—stronger than ABS (40 МПА) and comparable to some metals.​

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

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

• Размерная стабильность: Низкий коэффициент термического расширения (CTE: 8–12 × 10⁻⁵/°C) и минимальное поглощение влаги (0.2–0,5%)—ensures parts fit consistently in tight assemblies.​

Химическая устойчивость: Устойчив к маслам, смазки, растворители, и большинство бытовых химикатов (except strong acids/bases like nitric acid).

Наши возможности: Delivering High-Performance POM Injection Molding

В Yigu Technology, we specialize in POM injection molding—our capabilities are tailored to handle POM’s unique processing challenges (Чувствительность влаги, high crystallinity) and deliver parts that meet the strictest industry standards (НАПРИМЕР., Iso 9001 для автомобильной, FDA для медицинских устройств).​

Основные возможности поломки

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

POM’s unique characteristics—high crystallinity, Чувствительность влаги, and fast cooling rate—require a specialized, optimized process to maintain strength, низкое трение, и размерная стабильность. Our workflow minimizes defects and maximizes performance, whether you’re producing 50 gear prototypes or 500,000 automotive hinges.​

Шаг 1: Материал подготовка (Critical for POM)​

POM absorbs moisture rapidly (до 0.5% в 24 часы в 50% влажность), что вызывает hydrolytic degradation (трещины, Бриттлис, or reduced strength) during molding. Our preparation process eliminates this risk:​

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

• Additive/Filler Blending: Mix dried pellets with добавки (UV stabilizers for outdoor use, lubricants to enhance low friction) или наполнители (glass fiber for extra strength, carbon fiber for conductivity—note: fillers increase stiffness but may reduce friction performance).​

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

Шаг 2: Дизайн плесени (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:​

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

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

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

Шаг 3: Injection Parameters (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 (пожелтение) or incomplete filling. Below are standard settings for two common grades:​

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Шаг 4: Post-Molding Operations​

After demolding, POM parts may undergo:​

• Обрезка: Удаление лишнего пластика (вспышка) with sharp, low-friction tools (to avoid scratching POM’s surface—critical for low-friction parts like bearings).​

• Отжиг: Heating parts to 120–140°C for 1–2 hours, Затем медленно охлаждение (10–15°C/hour) Чтобы уменьшить внутренний стресс (prevents cracking in high-stress applications like automotive gears).​

• Поверхностная обработка: Applying coatings, текстурирование, or printing (См. Раздел 5 Для получения подробной информации).​

• Осмотр: QC checks for:​

• Точность размеров: 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).​

Сила: Тестирование на растяжение (ASTM D638) to verify strength meets specs (≥60 MPa for copolymer).

Материалы: Choosing the Right POM Grade for Your Project

Not all POM is the same—each grade (homopolymer, сополимер, подкреплен) is tailored to specific applications, balancing strength, Гибкость, и стоимость. Selecting the right grade ensures your parts meet performance, регулирующий, and design goals.​

Common POM Types for Injection Molding​

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Material Selection Tips​

1. Prioritize strength vs. Гибкость: For high-stress moving parts (передачи), choose POM homopolymer; for parts prone to impact (Дверь петли), pick copolymer.​

2. Consider environmental exposure: Для наружного использования, select UV-stabilized POM; for chemical-rich environments (Промышленная техника), use standard copolymer (better chemical resistance than homopolymer).​

Embrace sustainability: Our rPOM is ideal for brands focused on eco-friendly practices—use it for non-critical parts (НАПРИМЕР., игрушечные шестерни) to cut costs and reduce environmental impact.

Поверхностная обработка: Enhancing POM’s Function & Эстетика

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

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Преимущества: Why Choose POM Injection Molding?

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

Key Advantages of POM Injection Molding​

• Высокая сила & Жесткость: Stronger than most plastics (АБС, Стр) and comparable to brass (предел прочности: 60–70 MPa vs. brass’s 70–80 MPa)—ideal for structural parts that replace metal.​

• Низкое трение & Износостойкость: 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 (НАПРИМЕР., передачи).​

• Размерная стабильность: Minimal moisture absorption (0.2–0,5%) and low thermal expansion (8–12 × 10⁻⁵/°C)—ensures parts fit consistently in tight assemblies (НАПРИМЕР., электронные разъемы, Автомобильные датчики).​

• Экономическая эффективность: Cheaper than metal (Пома: ​3.50–5.00/kg vs. латунь: ​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.​

• Химическая устойчивость: Сопротивляется маслам, смазки, and solvents—ideal for parts exposed to harsh fluids (НАПРИМЕР., Компоненты автомобильного двигателя, Промышленная техника).​

POM vs. Other Engineering Plastics & Металл

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Индустрия приложений: Where POM Injection Molding Excels

POM’s unique blend of low friction, Высокая сила, and dimensional stability makes it indispensable in engineering-focused industries—often replacing metal to cut costs and weight while maintaining performance. Below are real-world use cases and our tailored solutions:​

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Тематические исследования: 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, и улучшить производительность. Below are three standout projects:​

Тематическое исследование 1: POM Copolymer Automotive Door Hinges​

• Испытание: Нужен ведущий автопроизводитель 500,000 door hinges that were lightweight (Для повышения эффективности использования топлива), воздействие (to withstand 100,000+ door openings), и рентабельный (to replace brass hinges). Their previous brass hinges were heavy (adding 0.5kg per car) and prone to rust.​

• Решение: Мы рекомендовали POM copolymer for its balance of flexibility (воздействие сопротивления: 10 KJ /) и сила. 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.​

• Результаты: The POM hinges were 60% lighter than brass (reducing per-car weight by 0.3kg and improving fuel efficiency by 1.5%) и стоимость 40% меньше. 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.​

Тематическое исследование 2: POM Homopolymer Industrial Conveyor Gears​

• Испытание: A logistics company needed 10,000 conveyor gears that could withstand 24/7 операция, 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.​

• Решение: Мы использовали 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 мкм (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.​

• Результаты: The POM homopolymer gears lasted 18 месяцы (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.​

Тематическое исследование 3: FDA-Compliant POM Copolymer Syringe Plungers​

• Испытание: Компания по медицинским устройствам нужна была 200,000 syringe plungers that were biocompatible (встречает ISO 10993), гладкий (to ensure precise fluid control), and sterilizable (via autoclaving). Their previous PP plungers were too flexible, causing inconsistent fluid delivery.​

• Решение: Мы выбрали FDA-compliant POM copolymer (meets USP Class VI standards) for its stiffness (flexural modulus: 2.8 Средний балл) и гладкая поверхность. Our molds had mirror-polished cavities (Раствор 0.05 мкм) to ensure plunger smoothness, and we optimized injection parameters (170°C barrel temp, 90 МПА давление) to avoid surface defects. Post-molding, we performed 100% Проверки размеров (±0.002mm tolerance) to ensure consistent fit in syringes.​

Результаты: The POM plungers provided 30% more precise fluid control than PP (per clinical tests) и прошел 50+ Циклы автоклав (121° C.) with no warping. They met all ISO 10993 Стандарты биосовместимости, 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, промышленное, and medical sectors trust us:​

1. Specialized POM Expertise​

We don’t just mold plastics—we specialize in Polyoxymethylene (Пома). У наших инженеров есть 15+ years of experience optimizing processes for POM’s unique traits:​

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

• Shrinkage control: Mold design techniques (shrinkage compensation, uniform cooling) that ensure dimensional accuracy (± 0,002 мм).​

• 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, сополимер, Стекло заполнен, переработан) and know how to tailor solutions for metal replacement, высокая одежда, or precision applications.​

2. Rigorous Quality Assurance​

Quality is critical for POM parts—especially those replacing metal or used in safety-critical applications. Мы держим Iso 9001 (Общее производство) и Iso 13485 (Производство медицинских устройств) сертификаты, с 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 (царапины, вспышка).​

• Post-molding:​

• Тестирование износа (Taber abrasion) for moving parts (передачи, подшипники).​

• Тестирование на растяжение (ASTM D638) Чтобы проверить силу (≥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 (НАПРИМЕР., helping you choose between POM homopolymer and copolymer for metal replacement).​

• Shares 3D mold designs and sample parts (в пределах 4 дни) for approval before full production.​

• Offers flexible lead times: 3–5 дней для прототипов (алюминиевые формы), 2–4 недели для больших объемов (стальные формы).​

• Обеспечивает 24/7 support for urgent issues (НАПРИМЕР., expediting parts for broken industrial machinery).​

4. Инновационные решения

Мы инвестируем 7% нашего годового дохода в 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% против. standard POM—ideal for oil-free applications (НАПРИМЕР., 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): Мы источны 40% of our POM materials from post-industrial waste (НАПРИМЕР., POM scrap from automotive manufacturing) and offer rPOM grades that cost 15–25% less than virgin POM.​

• Сокращение отходов: We recycle 96% of production scrap (вспышка, дефектные части) back into the molding process—sending only 4% to landfills.​

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

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