Molding Process
11 조회수
POM weld line weak strength
문제 현상
Fracture at the weld line.
원인 분석
POM crystallizes extremely fast, the melt fronts freeze quickly where they meet, and the molecular entanglement window is extremely short; cold fronts inevitably produce weak weld lines.
해결 방법
①Increase melt temperature (still must be <230℃) or mold temperature; ②increase injection speed; ③adjust the gate so the weld line avoids the stressed area; ④vent at the meeting point.
핵심 요약
POM weld lines = racing against crystallization speed.
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!