Processing Machinery
3 조회수
PA66 product shrinkage rate out of tolerance
문제 현상
Overall dimensional deviation, poor assembly.
원인 분석
Shrinkage 1.5%~2.5% value selection improper; holding has great influence; wall thickness differences also cause deviation; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience.
해결 방법
①Measure actually and repair the mold; ②optimize holding pressure and switchover point, taking into account both feeding and internal stress; ③unify measurement state; ④measure shrinkage by wall thickness and repair the mold with differentiated compensation; ⑤use CAE analysis to assist decision-making when necessary.
핵심 요약
PA66 dimension='measured correction': shrinkage rate measured by wall thickness, differentiated compensation; unified measurement state is the premise; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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