Processing Machinery
3 조회수
PP Material Change Cleaning
문제 현상
[Problem Phenomenon] Off-color and black specks after PP material/color change; incomplete cleaning
원인 분석
Material and color changes require thorough cleaning; PP can use PE or dedicated purging compound; double for dark-to-light changes; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
해결 방법
Use PE or purging compound replacement for color changes; double for dark-to-light; synchronize the hot runner; after adjustment, take continuous samples 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
Thorough cleaning for PP material changes; double for dark-to-light; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar future problems
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