Molds & Tooling
3 조회수
POM trapped air burning
문제 현상
Black spots and burn marks at the end of the cavity and at weld lines.
원인 분석
POM crystallizes quickly and fills quickly, so trapped air is compressed, heats up, and burns; POM decomposition gas release aggravates it.
해결 방법
①Open/clean vent grooves; ②decelerate at the end; ③control melt temperature to prevent decomposition; ④audit venting capacity.
핵심 요약
Burning = check both venting and temperature.
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