Extrusion & Post
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LDPE Haul-off Stability
Problem Phenomenon
LDPE film winding thickness records fluctuate.
Cause Analysis
Haul-off speed fluctuation changes the draw ratio; 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 literature and should be confirmed first during troubleshooting.
Solution
Haul-off closed-loop control; thickness measurement feedback; winding tension taper; 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.
Key Takeaway
Thickness stability relies on haul-off closed loop; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; Incorporate this case into the defect archive as a troubleshooting reference for similar future problems.
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