Pom plastic mold

We specialize in custom POM plastic mold development, POM (Polyoxymethylene, also known as Acetal) component production, and optional assembly services—not finished product trading. Our molds are engineered to maximize POM’s standout properties (low friction coefficient, high dimensional stability, excellent wear resistance) while addressing its molding nuances (e.g., high crystallinity, sensitivity to moisture), delivering high-precision POM parts for mechanical engineering, electronics, automotive, and consumer goods.

1. Custom Mold Structures: Tailored to POM’s Molding Characteristics

POM’s unique properties (high crystallinity, low shrinkage consistency, rigid structure) require molds that enhance its performance in precision and wear-resistant applications. Our custom mold structures include:

Cavity & Core: Machined via high-precision CNC turning/milling (tolerance as tight as ±0.008mm) to suit POM’s needs:

Smooth surface finishes (Ra ≤0.4μm) to leverage POM’s inherent low friction—critical for sliding or rotating parts (e.g., gears, bearings) where friction-induced wear must be minimized.

Uniform wall thickness (1–3mm) with minimal thickness variation—POM’s high crystallinity causes consistent shrinkage (1.5–2.5%); uneven thickness leads to warping, which ruins precision for fit-critical parts like connectors.

Optimized draft angles (1–2° for vertical surfaces)—POM’s rigidity and low adhesion to mold surfaces allow smaller draft angles than other plastics, preserving part precision while ensuring easy demolding.

Gating System: Designed for POM’s moderate melt viscosity (MFR 2–15 g/10min):

Small-diameter pin gates (0.5–1mm) for small precision parts (e.g., gear teeth, micro-connectors)—enables precise material flow, reducing weld lines that weaken POM’s structural integrity (critical for load-bearing parts).

Hot runner systems with temperature control (190–210°C) for multi-cavity parts (e.g., batch-produced fasteners)—maintains POM’s melt stability, cuts material waste by 15–20%, and eliminates cold runners that cause inconsistent shrinkage.

Cooling System: Calibrated to control POM’s fast crystallization rate:

Evenly spaced cooling channels (8–12mm apart) to ensure uniform cooling—POM’s rapid crystallization can create internal stress if cooled unevenly; consistent cooling preserves dimensional stability for parts like valve cores.

Moderate cooling time (10–25 seconds)—POM crystallizes quickly, so shorter cooling cycles boost efficiency without compromising part quality, ideal for high-volume production.

Ejection System: Suited to POM’s rigidity and precision:

Ejector pins with flat, polished tips (arranged at non-functional areas)—avoids marking POM’s surface, which is critical for parts requiring smooth sliding (e.g., sliding rails).

Stripper plates for large flat POM parts (e.g., mechanical covers)—distributes ejection force evenly, preventing bending of POM’s rigid structure.

2. POM Material Variants & Their Applications

POM is available in modified grades to match specific performance needs—we select the right variant based on your component’s function and environment:

Homopolymer POM: Ideal for high-precision, low-friction parts (e.g., gear teeth, ball bearing cages). Offers higher tensile strength (up to 70 MPa) and lower friction coefficient (0.15–0.25) than copolymers—suitable for mechanical parts where wear resistance and dimensional accuracy are paramount.

Copolymer POM: Used for general-purpose precision parts (e.g., electrical connectors, household appliance gears). More impact-resistant (10–15 kJ/m²) and less susceptible to thermal degradation than homopolymers—handles minor shocks better, making it ideal for consumer and electronic applications.

Glass-Filled POM (GF-POM, 10–30% GF): Perfect for high-load structural parts (e.g., automotive door lock components, industrial machine brackets). Reinforced with glass fiber to boost tensile strength (up to 90 MPa) and reduce shrinkage (1.0–1.2%)—supports heavier loads without deformation, critical for industrial machinery.

PTFE-Modified POM: Great for ultra-low-friction parts (e.g., sliding bearings, conveyor belt components). Blended with PTFE (Teflon) to lower friction coefficient (0.08–0.15)—enables smooth sliding even without lubrication, ideal for parts where maintenance is difficult.

Flame-Retardant POM (FR-POM): Suitable for electrical/electronic parts (e.g., switch housings, sensor casings). Meets UL94 V-0 standards—self-extinguishes quickly, maintaining structural integrity at high temperatures (up to 120°C), safe for use near electrical components.

3. POM Injection Molding Process: Optimized for Performance

Our injection process is fine-tuned to maximize POM’s precision and durability, with key advantages:

Precision & Consistency:

Melt temperature control (180–210°C)—POM degrades above 230°C, so precise heating ensures optimal flow without material breakdown, which would weaken part strength.

Injection pressure (60–90 MPa) with steady injection speeds—balances POM’s viscosity to fill mold cavities fully, avoiding underfilling (which ruins precision) or overfilling (which causes flash).

Dimensional tolerance control (±0.01mm for small parts) via servo-driven machines—critical for POM parts like micro-gears or precision connectors, where even tiny deviations break functionality.

Durability Enhancement:

Moisture pre-drying (80–90°C for 2–4 hours)—POM absorbs moisture easily, which causes bubbles and internal defects; pre-drying ensures parts have no voids, preserving wear resistance.

Post-molding annealing (100–120°C for 1 hour)—reduces residual stress, preventing cracking in POM parts exposed to temperature changes (e.g., automotive under-hood components).

Efficiency & Cost-Effectiveness:

Fast cycle times (15–30 seconds per part)—POM’s quick crystallization enables short cooling cycles, ideal for high-volume production (daily output up to 50,000 parts for small precision components like fasteners).

Multi-cavity molds (16–64 cavities for small parts)—POM’s consistent flow and shrinkage support uniform part quality across cavities, lowering per-unit costs for large orders.

4. Our Services: Beyond Molds—POM Components & Assembly

We provide end-to-end solutions for POM production, tailored to precision-focused needs:

POM Component Manufacturing: Produce custom POM parts in sizes (3×3mm to 300×200mm), shapes (gears, bearings, connectors), and finishes (smooth, textured). Supports tight tolerance requirements (down to ±0.008mm) and surface treatments (e.g., lubricant coating for enhanced sliding).

Value-Added Assembly: Optional assembly services for POM sub-assemblies—e.g., assembling POM gears into gearboxes, attaching metal inserts to POM brackets (for enhanced load capacity), or integrating POM sliding parts with mechanical housings. Delivers ready-to-install sub-assemblies, saving your production time.

Custom Design Support: Offer 3D mold design and POM prototyping (via CNC machining or injection molding). We produce 20–50 prototype parts in 2–3 days to test POM’s performance (wear resistance, dimensional stability, sliding smoothness) and optimize the mold design before mass production.

We are plastic mold maker and can provide custom mold service, we can make injection molds, blow molds, rotational molds and die-casting molds.

For custom injection molds, we can provide professional custom injection molding services. Usually Plastic injection mold manufacturing Molding are manufactured using injection molding technology. The mold materials for injection molds can be chosen from P20, 718, S136, H13 and so on. The mold material reflects the mold life and product material requirements.

For parts that require blow molding production, we can also provide professional custom blow molding services.

Plastic injection mold manufacturing Injection Mould making

1.We communicate product design according to samples/drawings and your requirements.

2.After the product design is confirmed, we carry out the mold design, we provide all kinds of injection molds, blow molds, silicone molds, die-casting molds services.

3.Material procurement, steel cutting and mold basic tools.

4.Mold assembly

5.Mold inspection, tracking and controlling mold processing.

6. We will inform you the date of mold trial and send you the sample inspection report and injection parameters together with the sample.

7.Your instruction and confirmation of shipment.

8.Prepare the mold before packing.

Plastic injection mold manufacturing molding Specification

1. Professional manufacturer, design, production injection mould and stamping mould quality control

2. rich export experience plastic injection mould and stamping mould

3. Reasonable price of design mould

4. Cavities: single or as per your requirements cavity

5. Treatment: S45C Pretreat>25Hrc,And Nitriding

6. Mould Steel: Cavity ,Core and slide: P20 ,2738,2136 available Moldbase :LKM available

7. Standard:DEM ,HUSKY,available

8. Hot runner: according to your demand

9. Life time: >300 Thousand Times

10. Package: Plywood case, anti-rust paint

Mold design：

Information you need to provide us

1. If you have drawings, 2D drawings, 3D drawings (preferably in STEP format).

2. If there are no drawings, you need to provide specific length, width, height and weight information. (It’s best to send us samples)

3. Should the mold be sent to your country, or leave the mold in our factory and we will help you produce the product.

4. Mold material requirements, cavity number requirements (you can tell us about the size of your injection molding machine)

5. Product material requirements and product quantity. (You can tell us about the use of the product and we can give you suggestions)

Transaction process:

Mold testing：

Once the mold is complete, I do a mold test. It usually takes about 3-5 days to complete. We need to assemble the mold, adjust the pressure data of the machine, and try production. We need to check whether there are problems during the normal production of the mold and make modifications.

Product packaging

Packaging according to your needs

1.By air ,it takes 3-7 days for delivery .The goods can be shipped by DHL ,Fedex ,UPS .

2.By sea ,the delivery time is based on your port .

To South East Asian Countries takes about 5-12 days

To Middle east countries takes about 18-25 days

To European countries takes about 20-28 days

To American countries takes about 28-35 days

To Australia takes about 10-15 days

To African countries takes about 30-35 days.

Factory

Video-1: (Factory Video)

Video-2: (Injection Molding)

Video-3: (Blow molding)

Video-4: (Blow molding)

Video-5: (Roll molding)

Customer satisfaction is our most important goal. We focus on communication and cooperation with our customers, always pay attention to their needs and provide quick response and quality customer service. Our injection production mold factory is committed to establishing long-term relationships and ensuring that our customers receive the best after-sales service during the purchase and use of our products, and we will definitely do our best to solve any problems for our customers.

FAQ

1. Who are we?

We are based in Zhejiang, China, start from 2014,sell to North America(30.00%),Southern Europe(10.00%),Northern.

Europe(10.00%),Central America(10.00%),Western Europe(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%). There are total about 51-100 people in our office.

2. How can we guarantee quality?

Always a pre-production sample before mass production;

Always final Inspection before shipment.

3. What can you buy from us?

Mould,Plastic Product, Metal Product,Dental Product,CNC machining.

4. Why should you buy from us not from other suppliers?

Ningbo P&M Plastic Metal Product Co., Ltd. We main do all kinds of 3d design, 3d printing and plastic metal molds tooling and products. We have our own engineer and factory. One-stop supply:3d design - 3d printing - mold making - plastic injection.

5. What services can we provide?

Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU;

Accepted Payment Currency:USD,EUR;

Accepted Payment Type: T/T,L/C,PayPal,Western Union,Escrow;

Language Spoken:English,Chinese,Spanish,French,Russian.

6. What are the characteristics of your service?

1. Your inquiry related to our products or prices will be replied within 24hours.

2. Welltrained and experienced staffs to answer all your enquiries in fluent English.

3. Offering the support to solve the problem in the application or selling period.

4. Competitive prices based on same quality.

5. Guarantee samples quality same as mass production quality.