Acetals are tough, resilient materials and exhibit good creep resistance, dimensional stability, and impact resistance even at low temperatures. Acetal grades are either homopolymers or copolymers. Homopolymers have better tensile strength, fatigue resistance and hardness but are difficult to process. Copolymers have better thermal stability, chemical resistance and processibility. Both homopolymers and copolymers are crystalline and have low moisture absorption.

Any type of gate may be used. When using tunnel gates, the short type is preferred. Insulated, hot tip runners are preferred for homopolymers; both internally and externally heated hot runners may be used in the case of copolymers.

Copolymers may be used continuously at air temperatures up to 100 C (212 F); homopolymers have slightly higher temperature resistance. Many grades of acetal materials are available, tailored to different applications.

Acetals have a low coefficient of friction and good dimensional stability. This makes it ideal for use in gears and bearings. Due to its high temperature resistance, it is used in plumbing (valve and pump housings), and lawn equipment.

High crystallinity levels of acetals lead to relatively high shrinkage levels of 0.02 - 0.035 mm/mm. Differential shrinkage is observed with reinforced grades.

POM injection molding processing condition Generic Class POM (Polyacetal or Polyoxymethylene) Applications Acetals have a low coefficient of friction and good dimensional stability. This makes it ideal for use in gears and bearings. Due to its high temperature resistance, it is used in plumbing (valve and pump housings), and lawn equipment. Injection Molding processing conditions Drying Not usually required but the material should be stored in a dry atmosphere.   Melt Temperature  180 - 230 C (356 - 446 F) for homopolymer; 190 - 210 C (374 - 410 F) for copolymer  Mold Temperature 50 - 105 C (122 - 221 F); Higher mold temperatures are preferred for precision molding which reduce post-molding shrinkage Material Injection Pressure 70 - 120 MPa Injection Speed Medium - High Runners and Gates Any type of gate may be used. When using tunnel gates, the short type is preferred. Insulated, hot tip runners are preferred for homopolymers; both internally and externally heated hot runners may be used in the case of copolymers.   If you need high quality cutom aluminium casting parts Pls contact us sales@viewmold.com   If you need high quality injection mold tooling, Contact us. Chemical and Physical Properties Acetals are tough, resilient materials and exhibit good creep resistance, dimensional stability, and impact resistance even at low temperatures. Acetal grades are either homopolymers or copolymers. Homopolymers have better tensile strength, fatigue resistance and hardness but are difficult to process. Copolymers have better thermal stability, chemical resistance and processibility. Both homopolymers and copolymers are crystalline and have low moisture absorption. Copolymers may be used continuously at air temperatures up to 100 C (212 F); homopolymers have slightly higher temperature resistance. Many grades of acetal materials are available, tailored to different applications. High crystallinity levels of acetals lead to relatively high shrinkage levels of 0.02 - 0.035 mm/mm. Differential shrinkage is observed with reinforced grades. If you need to look for more plastic resin injection molding processing condition, could you please click it.   If you need high quality plastic extrusion services, Pls contact us sales@viewmold.com   If you need high quality sheet metal parts, Pls contact us sales@viewmold.com The following is other plastic processing condition: ABS injection molding processing condition, HDPE injection molding processing condition, LDPE injection molding processing condition, PA12 injection molding processing condition, PA6 injection molding processing condition, PBT injection molding processing condition, PC-ABS injection molding processing condition, PC-PBT injection molding processing condition, PEI injection molding processing condition, PETG injection molding processing condition, PMMA injection molding processing condition, POM injection molding processing condition, PPE injection molding processing condition, HDPE injection molding processing condition, PP injection molding processing condition, PS injection molding processing condition, PVC injection molding processing condition, SAN injection molding processing condition,

50 - 105 C (122 - 221 F); Higher mold temperatures are preferred for precision molding which reduce post-molding shrinkage