Injection Molding
3 조회수
EVOH injection mold venting burnt
문제 현상
EVOH injection mold venting insufficient, air in the cavity compressed and heated, causing local burning
원인 분석
Insufficient vent groove area or improper position; injection speed too fast with air unable to escape in time; air compressed to high temperature >200°C causing oxidative burning
해결 방법
1) Increase 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 injection speed to reduce air compression; 4) Multi-stage injection with slow advance for venting
핵심 요약
Burning is caused by insufficient venting and high-speed injection compressing air; increasing venting and reducing speed are key
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