Production & Quality
4 조회수
PC Internal Stress Polariscope Detection
문제 현상
The products crack after storage or use for a period of time, and obvious colored fringes are visible under the polariscope
원인 분석
During PC molding, molecular chain orientation is frozen to form residual stress; when the internal stress exceeds the crack resistance, cracking occurs; the polariscope can visualize the stress distribution, and birefringence exceeding 30nm/cm indicates high risk
해결 방법
①Use a polariscope to sample the stress distribution, focusing on the gate and wall thickness transition areas; ②control the residual stress within 20% of the yield strength; ③anneal the out-of-spec parts and re-inspect
핵심 요약
Polariscope detection is a quantitative tool for PC stress management; only by turning invisible internal stress into a measurable indicator can preventive control be achieved; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!