Injection Molding 3 조회수

Severe internal stress concentration of PU

문제 현상

Internal stress of PU products >15MPa, causing cracking during storage

원인 분석

Injection speed too fast, large orientation stress; uneven cooling freezing thermal stress; improper gate position, concentrated flow orientation

해결 방법

1) Reduce injection speed to reduce orientation; 2) Uniform mold temperature to reduce thermal stress; 3) Anneal at 80°C/4h to release stress; 4) Optimize gate position

핵심 요약

Internal stress is caused by fast injection and uneven cooling; speed reduction, uniform cooling and annealing are key

PU internal stress orientation stress annealing treatment uniform cooling

이 정보가 도움이 되었나요?

0 명이 도움이 되었다고 합니다

Severe internal stress concentration of PU

견적 받기