Moldflow, Filling, Cooling, Warpage analysis, POM (Polyacetal or Polyoxymethylene)

Specialised Moldflow Analysis
 Imtech Moldflow Analysis



POM materials

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.

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.

 

Injection moulding Polymer Process Guide

Accurate and Confidential Moulding Solutions Since 1987

 

Moldflow, Filling, Cooling, Warpage analysis, weld lines, flow lines, fiber orientation, polymer flow, rapra, part advisor
Moldflow, Filling, Cooling, Warpage analysis, weld lines, flow lines, fiber orientation, polymer flow, rapra, part advisor
Moldflow, Filling, Cooling, Warpage analysis, weld lines, flow lines, fiber orientation, polymer flow, rapra, part advisor t1 automotive plastic molding, injection moulding, toolmaking CAE services moldex, cadmold, gas injection, fibre filled, mpi, fusion, midplane models Imtech Design,household appliances, tooling, tools, mould, die, toolmaker, die maker, Moldflow Filling, Cooling and Warpage analysis medical device, simulation of plastic injection moulded products meiki, kawaguchi,milacron, mitsubishi, negri bossi, netstal, niigata, nissei, omf turra, oima, plastak, sandretto, stork, van dorm Moldflow, Catia, Solidworks, Inventor, SDRC, Solidedge, STEP, STL, Parasolid, iges, pro engineer, unigraphics, ideas, finite element cycle time, Cooling, analysis, production rate, fast cycle, plastic, injection moulding, molding process, efficiency CAD, CAD/CAM, CAM, Computerizes Numerical Control, CNC, Cutting Tools, Diecasting, Die casting, Diemaking, Die making, Dies, Drilling machines, Dry Machining, EDM Mold Seminars, Mold Shows, Mold Statistics, Mold Testing, Mold Training, Mould Associations Moldflow, fibre, gas, midplane analysis, plastic molding, injection moulding Filling, analysis, plastic molding, plastic consultant, plastics advice sigmasoft, cadmold, moldex 3d, cmold, moldflow, cae injection molding simulation services, plastics engineering, hot runners arburg, asian plastic machinery, atec, battenfeld, bmb, chen hsong, demag ergotech, dgp windsor, dongshing hydraulics, engal, fu chun shin, hpm, husky, jaco manufacturing, jsw japan steel works, jinhwa injection molding simulation software, plastics solutions, flow front, extrusion, trade moulder, custom molder husky, mold masters, inco, fast heat, synventive, hrs flow, polyshot, pms systems, ewikon, manner, gunther, orycon, dme, modplas, thermoplay, volastic, hasco. Mould Builder, Mould Buyers Guide, Mould Coating, Mould Components, Mould Conference, Mould Design, Mould Directory, Mould Distributor, Mouldmaker, Mould Maker, Mould Mold Making, Moldmaking Equipment, Mold Making Equipment, Mold materials, Mold Metals, Mold Polishing, Mold Products, Mold Repair Mold Components, Mold Conference, Mold Design, Mold Directory, Mold Distributor, Mold Magazine, moldmaker, Mold Maker, Mold maker magazine, Moldmaking Moldflow,moldex, cadmold, polymer , plastic, composite, hdt, gas injection, fibre filled, glass, talc, mineral, gas, blowing agent, mpi Machining Centers, Metalworking, Metal working, Milling Machines, Mold, Mold Associations, Mold Builders, Mold Buyers Guide, Mold Coating Electrical Discharge Machining, ETMM, Graphite, Grinding machines, Hot Runners, Injection Molding Molds, Injection Moulding Moulds, Machining Moldflow, Filling, Cooling, Warpage analysis, weld lines, flow lines, fiber orientation, polymer flow, rapra, part advisor


Specialised Moldflow Analysis
 Imtech Design Moldflow Analysis