POM (Acetal) plastic parts production

We specialize in plastic fitting injection molding, delivering custom precision plastic fittings and optional assembly solutions to clients across plumbing, HVAC, automotive, medical devices, industrial fluid handling, and water treatment sectors. Unlike finished product traders, we focus exclusively on the design and injection molding of high-performance plastic fittings—components critical for connecting, directing, or controlling fluid/gas flow in various systems. Our core strength lies in tailoring plastic fitting solutions to your specific pressure, temperature, and chemical compatibility requirements: from small-diameter medical fittings to large-scale industrial plumbing components—ensuring every molded fitting offers leak-proof performance, durability, and seamless integration with your systems.

Our Core Service: Engineered Acetal Components & Precision Assemblies

We manufacture the critical, close-tolerance plastic parts that ensure smooth operation in mechanisms and assemblies. Our expertise lies in producing custom POM components where dimensional accuracy, wear resistance, and predictable performance are paramount. We add further value through secondary operations such as precision machining, turning, milling, and assembly with other components, delivering finished, ready-to-integrate subsystems that reduce your manufacturing complexity.

Custom Design for POM's Precision Characteristics

Designing for Acetal requires an understanding of its rigid yet slippery nature and precise shrinkage behavior. We engineer each part for optimal functionality and manufacturability:

Ribs & Structural Features: Designed with moderate thickness to avoid sink marks on opposite surfaces, maintaining the part's excellent natural stiffness and flatness.

Bosses & Fastening Points: Strategically reinforced and often designed with press-fit or self-tapping screw specifications in mind, utilizing POM's good creep resistance to maintain clamping force.

Gears, Bearings & Wear Surfaces: A core specialty. We engineer precise tooth profiles, bearing clearances, and sliding surfaces to leverage POM's low friction and high wear resistance, often eliminating the need for external lubricants.

Snap-fits & Latches: Designed with calculated deflection and stress limits to utilize POM's excellent fatigue resistance and spring-like characteristics for secure, repeated engagement.

Tolerance & Shrinkage Management: Precise, uniform shrinkage (typically ~2.0-2.5%) allows for predictable tolerances. We design molds and processes to hold extremely tight dimensional specs, critical for interacting mechanical parts.

POM Material Science: The Right Acetal for the Task

POM is a high-strength, semi-crystalline engineering thermoplastic available in two primary types. We guide you to the optimal choice:

POM Homopolymer (e.g., Delrin®): Offers higher tensile strength, stiffness, and hardness. It has a higher melting point and excellent fatigue resistance. Ideal for high-load precision gears, fasteners, lock mechanisms, and mechanical springs.

POM Copolymer: Provides better long-term chemical and thermal stability, including improved resistance to hot water and strong bases. It also exhibits lower mold deposit formation. Preferred for pump and valve components, fluid handling systems, shower heads, and parts requiring repeated sterilization.

Reinforced & Modified Grades:

PTFE or Silicone-Filled: Provides even lower friction and higher PV limits for advanced bearings, seals, and high-wear sliding components.

Glass or Carbon Fiber-Reinforced: Increases stiffness, dimensional stability, and heat deflection temperature for structural brackets and components under continuous load.

Key POM Properties & Applications:

High Stiffness & Dimensional Stability: Low moisture absorption means parts maintain their precise dimensions and shape in humid or wet environments, unlike nylon.

Excellent Wear & Abrasion Resistance: Combined with a low coefficient of friction, this makes it the premier choice for gears, bushings, slides, and conveyor components.

Good Chemical Resistance: Resistant to hydrocarbons, solvents, and neutral chemicals. Well-suited for fuel systems, aerosol components, and cosmetic applicators.

High Fatigue Endurance & Springback: Perfect for living hinges (in thin sections), clips, clasps, and snap-action mechanisms.

The Precision POM Injection Molding Process: Controlling a Crystalline Polymer

Molding Acetal to its full potential requires precise thermal control and process expertise to manage its sharp melting point and crystalline structure.

Process Specifics: We employ moderate melt temperatures and fast injection speeds to fill molds efficiently before premature crystallization begins. Precise mold temperature control (typically 80-110°C) is critical to promote proper crystallization, achieve excellent surface finish, and minimize post-molding shrinkage.

Critical Challenge Management: We utilize optimized venting and process parameters to minimize the risk of formaldehyde gas generation, which can cause porosity and surface defects if not properly managed.

Key Advantages of Our POM Production:

Unmatched Dimensional Precision: Our controlled process yields parts with exceptional dimensional repeatability and stability, batch after batch, essential for interchangeability in assemblies.

Superior Surface & Aesthetic Quality: Proper processing results in smooth, glossy surfaces with a natural lubricity, often requiring no post-finishing for functional applications.

Optimal Mechanical Property Realization: Correct thermal management during molding ensures the material achieves its full potential in strength, stiffness, and long-term creep resistance.

Efficiency in High-Volume Production: POM's rapid crystallization leads to fast cycle times, making it highly cost-effective for large production runs of precision components.

Why Partner with Us for Acetal Parts?

Our differentiation is our focused expertise on this specific, performance-driven polymer. We understand the nuances between homopolymer and copolymer and how to process them for optimal results. We provide critical Design for Manufacturability (DFM) feedback tailored to POM's behavior. From prototype to high-volume production, we maintain rigorous quality control to ensure every component meets the precise geometric and performance specifications required for flawless operation in your final product.

Choose us for your POM components when your application demands precision, durability, and smooth mechanical function. We deliver more than just plastic parts; we provide engineered acetal solutions that ensure reliability in motion.

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.