Processing Machinery
3 조회수
PET bottle body stress cracking
문제 현상
PET bottles crack at the bottom after being filled with liquid and stored for a period of time
원인 분석
Stress concentration in the bottle bottom design plus environmental stress action of the contents; release of residual stress triggers cracking; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
Optimize the bottle bottom structure to reduce stress concentration; the blowing process ensures uniform stretch ratio; content compatibility verification; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
핵심 요약
Stress cracking requires three-party verification of structural design, process, and contents; 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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