Molds & Tooling
3 조회수
PBT Poor Demolding
문제 현상
The product sticks to the mold and is scratched, deforms during ejection, and improvement is limited after mold temperature and holding pressure adjustment
원인 분석
PBT poor demolding stems from excessive holding pressure, too high mold temperature and insufficient cooling, and insufficient draft angle; glass fiber material has large mold-gripping force; polishing and draft angle are the mold-side foundation
해결 방법
①Reduce holding pressure and mold temperature; ②Ensure draft angle ≥0.5°; ③Polish the cavity to reduce friction; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
핵심 요약
PBT poor demolding is investigated along three lines: pressure, temperature, and structure; the basic condition of the mold is fundamental; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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