Material Drying
4 조회수
PVC Bubble Troubleshooting
문제 현상
Bubble positions on PVC products are random
원인 분석
Three causes: moisture, degradation gas, entrapped air—PVC degradation gas accounts for a high proportion; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
해결 방법
First check temperature and residence to rule out degradation; then check drying; finally check venting and back pressure; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
핵심 요약
For PVC bubbles, check degradation first, then moisture; 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 problems in the future
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