Molds & Tooling
3 조회수
PC Trapped Air Burning
문제 현상
[Problem Phenomenon] PC end rib areas are burnt and blackened, with a peculiar smell
원인 분석
Trapped air is adiabatically compressed, heated and burnt; PC is sensitive to high temperature and more prone to burning; poor venting combined with high melt temperature superimposes; when troubleshooting on site, verify each item according to this mechanism one by one, and avoid blindly adjusting the machine based on experience alone
해결 방법
Strengthen venting at the end; reduce the final-stage injection speed; adjust the melt temperature back from the upper limit; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, so as to locate effective measures
핵심 요약
For PC burning, first clear the venting; high-temperature materials fear trapped air more; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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