Injection Molding
3 조회수
Severe excessive orientation of PU
문제 현상
Longitudinal-transverse performance difference of PU products >50%, excessive orientation
원인 분석
Injection speed too fast, molecular chains highly oriented in the flow direction; gate design causing unidirectional flow
해결 방법
1) Reduce injection speed to reduce orientation; 2) Multi-point gates to reduce unidirectional flow; 3) Annealing treatment to partially release orientation
핵심 요약
Excessive orientation is caused by fast unidirectional flow; speed reduction and multi-point gates are key
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