Processing Machinery
3 조회수
PET thickness fluctuation
문제 현상
PET sheet longitudinal thickness fluctuates periodically
원인 분석
Thermal expansion drift of die bolts or metering pump speed fluctuations cause periodic thickness changes; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
Adjust die bolts in hot state; closed loop between metering pump and extrusion speed; online thickness measurement feedback; after adjustment, continuously sample 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
Longitudinal thickness relies on metering stability and online closed loop; after confirming effectiveness, fix 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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