Processing Machinery
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LLDPE film production line speed-up
Problem Phenomenon
After speed-up, bubble instability and thickness deviation problems erupt collectively.
Cause Analysis
LLDPE high-speed production has higher requirements for cooling and bubble stabilization; the original equipment capability reaches its limit.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based only on experience.
Solution
①Evaluate cooling system upgrade; ②adopt a dual-lip air ring; ③strengthen online thickness measurement; ④stepwise speed-up verification.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Speed-up is a system engineering; cooling and inspection capabilities must precede the speed increase.; 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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