Extrusion & Post
9 Aufrufe
PET uneven winding
Problembeschreibung
PET sheet winding end faces are uneven
Ursachenanalyse
Transverse thickness fluctuations of the sheet make winding tension uneven, and the end faces gradually drift; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Lösung
Fine-tune the die lip gap to control transverse thickness; winding tension taper control; add EPC correction; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
Winding quality depends on thickness uniformity and tension control; 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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