Extrusion & Post
11 조회수
PET sheet warpage
문제 현상
PET sheet edges curl up and become uneven after winding
원인 분석
Uneven cooling of the three rolls causes crystallinity differences between the two sides of the sheet; residual stress causes warpage; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
Recalibrate the three-roll temperature gradient; balance cooling on both sides of the sheet; add cooling rolls before winding; 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
Sheet warpage is a manifestation of uneven cooling on both sides; 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
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!