Processing Machinery
3 조회수
PMMA Burnt
문제 현상
Brown burnt marks appear at corners of PMMA products
원인 분석
Adiabatic compression of trapped air makes local temperature exceed the degradation temperature, decomposing and discoloring PMMA; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
Add venting at burnt locations; reduce end-stage speed; clean vent grooves; 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 to facilitate locating effective measures
핵심 요약
PMMA burnt is handled by trapped air venting; 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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