POM Injection Molding Service

Durable, precise, and wear-resistant — We provide POM injection molding solution deliver high-performance parts for demanding applications.

Erye Offer POM Injection Molding Service to Specific to Your Needs!

POM (Polyoxymethylene), also known as acetal, is valued for its high stiffness, low friction, and excellent dimensional stability, making it ideal for precision parts in demanding applications. Our injection molding expertise ensures that POM components achieve superior mechanical performance, tight tolerances, and a flawless finish.

Our POM injection molding capabilities includes,

Free & fast DFM report with optimized designs
In-housing tooling for fast turnaround with high precision
Reinforced POM molding with additives like glass fiber for enhanced strength
High-precision molding for complex geometries and tight tolerances
Custom surface finishing to enhance POM parts performance
Secondary processing including machining, ultrasonic welding, and assembly

POM Delrin Injection Molding Services

Service	Details
Maximum Part Size	2500mm x 2000mm (98 in. x 78 in.)
Recommended Wall Thickness	0.89 mm and 3.81 mm(0.035 to 0.150 inches)
Color Options	Any color according to RAL or Pantone Code
Standard Finishes	SPI and VDI
Mold Ownership	Customer owned with mold maintenance
Mold Life	Unlimited (If the POM mold worn out, Erye will cover the cost of new mold)

POM Delrin Injection Molding Design Guidelines

POM’s high stiffness, low friction, and dimensional stability make it ideal for precision components, but its shrinkage and potential for stress cracking require careful design considerations.

Item	Description
Wall Thickness	Maintain uniform wall thickness between 0.8mm and 3.0mm to reduce differential shrinkage and warpage. Avoid abrupt thickness transitions.
Draft Angles	Ensure 0.5°–2° draft to facilitate part ejection without surface defects, especially for textured surfaces.
Fillets and radii	Use a minimum radius of 0.5mm at internal corners to prevent stress concentration and potential cracking.
Rib design	Ribs should be 40–60% of the adjacent wall thickness to prevent sink marks while adding strength.
Venting	Provide adequate venting (vent depth 0.02–0.05mm) to prevent gas entrapment, which can cause burn marks or short shots.
Shrinkage allowance	Consider POM’s shrinkage (1.8%–2.5%) when designing mating parts, particularly for press-fit or snap-fit applications.
Bosses and fasteners	Design bosses with an outer diameter 2–3 times the screw diameter and reinforce with gussets to avoid cracking under load.
Snap-fit design	For snap-fit features, maintain a deflection strain below 5% to prevent permanent deformation or fracture.
Tolerance control	Due to POM’s thermal expansion, set realistic tolerances (±0.05mm–±0.10mm) based on the part size and function.

Start Delrin Plastic Molding Project

Get high-quality POM injection molding parts! Contact with Erye to request a quote!

Advantages of POM Injection

Exceptional Dimensional Stability

POM exhibits minimal shrinkage and low moisture absorption (typically <0.25%), ensuring tight tolerances for precision components like gears and bearings.

High Stiffness & Strength

With a tensile strength of around 60-70 MPa and excellent rigidity, POM is ideal for structural parts that require durability and load-bearing capacity.

Low Friction & Excellent Wear Resistance

Its low coefficient of friction (~0.2) and self-lubricating properties make it a top choice for moving parts such as sliding mechanisms, bushings, and cams.

Superior Fatigue & Creep Resistance

POM maintains mechanical integrity under repeated stress, making it ideal for snap-fit components and long-lasting mechanical parts.

Good Impact Strength

With impact resistance superior to many other rigid plastics, POM can withstand repeated mechanical stresses in demanding applications.

Disadvantages of POM Injection

Poor UV Resistance

Standard POM breaks down quickly under sunlight. Sunlight can cause it to fade, chalk, or lose strength unless UV stabilizers are added.

Difficult to Bond or Paint

Because POM has a very “slippery” surface, glue, paint, or printing ink does not stick well without special surface treatment.

Expands with Heat

POM’s thermal expansion rate is relatively high, which means POM can change size when exposed to temperature shifts, this may affect tight-tolerance parts used in hot environments.

Risk of Breakdown During Processing

When heated above 220°C, POM can break down and release irritating fumes, so careful temperature control is required.

POM Injection Molding Product Applications

Automotive

Gear mechanisms
Fuel system components
Door locks and latches
Steering column bearings

Electronics & Electrical

Connectors and switch housings
Insulating components
Cable ties and wire management clips
Printer and scanner gears

Medical Device

Inhaler components
Surgical instrument handles
Drug delivery system parts
Prosthetic joint components

Industrial Components

Precision gears and pulleys
Conveyor system rollers
Bearings and bushings
Fasteners and clips

Additonal Options for POM Parts

Case Study

Case Study of Automotive Glove Box Development

Learn how to help a customer move from an early glove box concept to a fully tooled, production-ready part. This case shows how we designed the mold, optimized the tooling, and reached reliable mass production.