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POM material (polyoxymethylene) can be processed by a variety of techniques including injection molding, extrusion molding, blow molding and hot pressing .
Injection molding
Injection molding is one of the most commonly used processing methods for POM materials. POM material exhibits excellent mechanical properties, wear resistance and self-lubrication during the injection molding process, making it suitable for manufacturing various precision parts and components. The hardness of die steel for injection molding usually needs to reach HRC50 or above to ensure the precision and stability of the die .
Extrusion molding
Extrusion molding is suitable for the production of products such as profiles, pipes and films. POM materials exhibit excellent plasticizing and fluidity during the extrusion process, enabling the production of products with smooth surfaces and stable dimensions. Extruded POM material is widely used in the manufacture of mechanical parts such as gears, bearings, seals, .
Blow molding
Blow molding is mainly used for the production of hollow products, such as bottles and buckets. POM material shows good formability and dimensional stability in blow molding, suitable for manufacturing products that require high strength and high transparency .
Hot pressing forming
Hot pressing molding is suitable for the production of small parts and products with complex shapes. POM material exhibits good formability and dimensional stability during hot pressing and is suitable for manufacturing precision parts and components .
All of our made POM parts are custom made according to customer's drawings. If you are interested in, please find below our work chart:
Superior Material Performance:
Low Friction & High Wear Resistance: Reduces energy loss, noise, and maintenance in moving parts (bushings, gears, slides).
Excellent Dimensional Stability: Maintains tight tolerances across temperature/humidity changes, critical for precision assemblies.
High Stiffness & Strength: Handles mechanical loads effectively while remaining lightweight.
Good Chemical Resistance: Withstands fuels, solvents, and weak alkalis/acids common in industrial environments.
Low Moisture Absorption: Prevents swelling/performance degradation in humid conditions.
Machinability: Relatively easy to CNC machine to high precision with excellent surface finish.
Hexagonal Bar Stock Advantage:
Reduced Machining Time & Waste: Hex stock significantly lowers the amount of material needing removal compared to round bar for hexagonal features or flats, leading to faster cycle times and lower material costs per part.
Simplified Fixturing: Hexagonal geometry provides natural, stable clamping surfaces during machining, improving accuracy and reducing setup complexity.
Enhanced Grip/Functionality: The inherent hex shape is often functional in the final part (e.g., wrench flats on spacers, adjusters, or fittings).
Precision CNC Machining Capability:
Complex Geometries: Ability to machine intricate features, threads, undercuts, and tight tolerances consistently.
High Accuracy & Repeatability: Consistent production of parts meeting demanding specifications, ensuring interchangeability.
Excellent Surface Finish: Smooth finishes straight off the machine reduce friction and often eliminate the need for secondary finishing.
Packaging:
FAQ:
1Q: What are the key advantages of using POM (Acetal) for precision machined parts?
1A: POM offers exceptional dimensional stability, low friction/high wear resistance, high stiffness-to-weight ratio, good chemical resistance, and low moisture absorption – ideal for demanding mechanical components.
2Q: Why use hexagonal bar stock instead of round bar for CNC machining these parts?
2A: Hexagonal bar minimizes material waste and machining time for parts requiring flats or hexagonal features, reduces fixturing complexity, and provides inherent functional geometry (e.g., wrench flats) in the final component.
3Q: What tolerance levels can you consistently hold on POM hex bar parts?
3A: We routinely hold ISO 2768-fine tolerances (±0.05mm / ±0.002") on critical dimensions. Tighter tolerances (±0.025mm / ±0.001") are achievable based on geometry and controlled machining parameters accounting for POM's low isotropic shrinkage.
4Q: Does machining POM require special surface finish considerations?
4A: POM machines to an inherently smooth finish (typically Ra 0.8 - 1.6 μm / 32 - 63 μin) with sharp tools and optimized feeds/speeds. Minimal post-processing is needed for low-friction applications. Specific finishes (e.g., polished) are available.
5Q: Are these POM parts suitable for food-safe or medical applications?
5A: Standard white POM is not inherently FDA-compliant or USP Class VI certified. We offer FDA-compliant POM-H (Homopolymer) grades and can source USP Class VI materials for medical device components upon request, with full documentation.
POM material (polyoxymethylene) can be processed by a variety of techniques including injection molding, extrusion molding, blow molding and hot pressing .
Injection molding
Injection molding is one of the most commonly used processing methods for POM materials. POM material exhibits excellent mechanical properties, wear resistance and self-lubrication during the injection molding process, making it suitable for manufacturing various precision parts and components. The hardness of die steel for injection molding usually needs to reach HRC50 or above to ensure the precision and stability of the die .
Extrusion molding
Extrusion molding is suitable for the production of products such as profiles, pipes and films. POM materials exhibit excellent plasticizing and fluidity during the extrusion process, enabling the production of products with smooth surfaces and stable dimensions. Extruded POM material is widely used in the manufacture of mechanical parts such as gears, bearings, seals, .
Blow molding
Blow molding is mainly used for the production of hollow products, such as bottles and buckets. POM material shows good formability and dimensional stability in blow molding, suitable for manufacturing products that require high strength and high transparency .
Hot pressing forming
Hot pressing molding is suitable for the production of small parts and products with complex shapes. POM material exhibits good formability and dimensional stability during hot pressing and is suitable for manufacturing precision parts and components .
All of our made POM parts are custom made according to customer's drawings. If you are interested in, please find below our work chart:
Superior Material Performance:
Low Friction & High Wear Resistance: Reduces energy loss, noise, and maintenance in moving parts (bushings, gears, slides).
Excellent Dimensional Stability: Maintains tight tolerances across temperature/humidity changes, critical for precision assemblies.
High Stiffness & Strength: Handles mechanical loads effectively while remaining lightweight.
Good Chemical Resistance: Withstands fuels, solvents, and weak alkalis/acids common in industrial environments.
Low Moisture Absorption: Prevents swelling/performance degradation in humid conditions.
Machinability: Relatively easy to CNC machine to high precision with excellent surface finish.
Hexagonal Bar Stock Advantage:
Reduced Machining Time & Waste: Hex stock significantly lowers the amount of material needing removal compared to round bar for hexagonal features or flats, leading to faster cycle times and lower material costs per part.
Simplified Fixturing: Hexagonal geometry provides natural, stable clamping surfaces during machining, improving accuracy and reducing setup complexity.
Enhanced Grip/Functionality: The inherent hex shape is often functional in the final part (e.g., wrench flats on spacers, adjusters, or fittings).
Precision CNC Machining Capability:
Complex Geometries: Ability to machine intricate features, threads, undercuts, and tight tolerances consistently.
High Accuracy & Repeatability: Consistent production of parts meeting demanding specifications, ensuring interchangeability.
Excellent Surface Finish: Smooth finishes straight off the machine reduce friction and often eliminate the need for secondary finishing.
Packaging:
FAQ:
1Q: What are the key advantages of using POM (Acetal) for precision machined parts?
1A: POM offers exceptional dimensional stability, low friction/high wear resistance, high stiffness-to-weight ratio, good chemical resistance, and low moisture absorption – ideal for demanding mechanical components.
2Q: Why use hexagonal bar stock instead of round bar for CNC machining these parts?
2A: Hexagonal bar minimizes material waste and machining time for parts requiring flats or hexagonal features, reduces fixturing complexity, and provides inherent functional geometry (e.g., wrench flats) in the final component.
3Q: What tolerance levels can you consistently hold on POM hex bar parts?
3A: We routinely hold ISO 2768-fine tolerances (±0.05mm / ±0.002") on critical dimensions. Tighter tolerances (±0.025mm / ±0.001") are achievable based on geometry and controlled machining parameters accounting for POM's low isotropic shrinkage.
4Q: Does machining POM require special surface finish considerations?
4A: POM machines to an inherently smooth finish (typically Ra 0.8 - 1.6 μm / 32 - 63 μin) with sharp tools and optimized feeds/speeds. Minimal post-processing is needed for low-friction applications. Specific finishes (e.g., polished) are available.
5Q: Are these POM parts suitable for food-safe or medical applications?
5A: Standard white POM is not inherently FDA-compliant or USP Class VI certified. We offer FDA-compliant POM-H (Homopolymer) grades and can source USP Class VI materials for medical device components upon request, with full documentation.
