Processing Machinery
3 조회수
PMMA Barrel Residual Material
문제 현상
After PMMA shutdown, the first shots after restarting always have degradation spots
원인 분석
Residual material retained in the barrel during shutdown oxidizes and degrades, and mixes into products at restart; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
해결 방법
Empty the barrel before shutdown; after restarting, make air shots until the extrudate is normal; clean after long-term shutdown; 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
Barrel emptying at shutdown is a standard action to prevent degradation spots; 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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