Injection Molding
11 조회수
Warpage deformation of PET injection molded parts
문제 현상
PET injection molded products warp after demolding, with flatness exceeding the tolerance range.
원인 분석
Uneven mold temperature distribution causes inconsistent crystallinity and shrinkage rates in various areas; uneven wall thickness causes cooling differences; molecular orientation is asymmetric.
해결 방법
Equalize mold temperature (within ±3°C); design products with uniform wall thickness; optimize gate position; extend cooling time.
핵심 요약
The root of PET warpage lies in uneven shrinkage.
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