Processing Machinery
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LDPE Film Screw L/D Ratio
Problem Phenomenon
Poor plasticizing with many gel particles; evaluation finds the screw L/D ratio is insufficient.
Cause Analysis
A screw with a short L/D ratio has insufficient plasticizing and mixing travel, leaving unmelted particles; film-grade production requires sufficient plasticizing capacity.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solution
①Select a screw with sufficient L/D ratio; ②Equip a barrier mixing structure; ③Optimize temperature compensation; ④Regularly test plasticizing quality.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Screw configuration is the hardware foundation of plasticizing quality; film production should not save cost on the screw.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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