Extrusion & Post
4 조회수
PE Extrusion Screw Slippage and Plasticization Fluctuation
문제 현상
During plasticization, the screw makes abnormal noises, the discharge fluctuates between more and less, the main motor current fluctuates greatly, and the product quality becomes unstable accordingly.
원인 분석
Excessive feed zone temperature causes the PE pellets to melt prematurely and wrap the screw causing slippage, or hopper bridging and abnormal pellet shapes (powder/film material mixed in) make the conveying unstable; screw feed zone wear also causes conveying efficiency fluctuations.
해결 방법
①Lower the feed zone temperature and strengthen the hopper throat cooling; ②check and eliminate feeding bridging; ③evaluate the screw feed zone wear; ④control the ratio and shape of powder/regrind; ⑤use forced feeding or grooved feed bushings if necessary.
핵심 요약
For PE discharge pulsation, first check 'feed zone temperature + feeding': slippage and bridging are the two most common roots; the feed zone is the starting point of extrusion stability—if problems occur here, no matter how accurate the downstream temperature control is, it is useless.
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!