Injection Molding
5 조회수
Burnt marks due to poor venting in EAA injection mold
문제 현상
Insufficient venting of the EAA injection mold, air in the cavity is compressed and heated, causing local burning
원인 분석
Insufficient vent groove area or improper location; injection speed too fast, air has no time to escape; air compressed to high temperature >200°C causes oxidative burning
해결 방법
1) Increase the vent groove area, depth 0.02-0.03mm, width 5-10mm; 2) Set vent grooves in the last-filled area of the melt; 3) Reduce the injection speed to reduce air compression; 4) Use multi-stage injection with slow advance for venting
핵심 요약
Burning is caused by insufficient venting and air compression from high-speed injection; increasing venting and reducing speed are the key
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