Extrusion & Post
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HDPE extrusion screw slipping
Fenómeno do problema
During plasticization, the screw makes abnormal noise, the discharge fluctuates, and the current fluctuates greatly.
Análise das causas
The feed section temperature is too high, and the particles melt too early and wrap the screw causing slipping; or hopper bridging and abnormal particle shape make conveying unstable.
Solução
①Lower the feed section temperature and strengthen hopper neck cooling; ②check for feeding bridging; ③evaluate screw feed section wear; ④rationalize the particle/powder ratio.
Conclusão principal
For discharge pulsation, first check the feed section temperature and feeding.
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