Extrusion & Post
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HDPE film uneven winding
Problem Phenomenon
The end face of the film roll has staggered layers, taper or collapsed edges, and it runs off track during unwinding.
Cause Analysis
Uneven winding tension or improper taper setting; accumulated film thickness deviation also deforms the film roll.; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①Optimize the winding tension curve and taper; ②improve the film thickness uniformity; ③check the winding alignment; ④standardize the roll change operation.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Winding quality is the final embodiment of all deviations in the preceding processes; tension management and thickness uniformity are equally important.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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