Extrusion & Post
10 조회수
PVA screw slipping
문제 현상
During PVA extrusion, the screw slips, feed does not advance, output drops sharply
원인 분석
PVA pellets melt too early in the feed section forming a lubricating film causing screw slip; feed section temperature too high
해결 방법
1) Lower feed section temperature by 10-15°C to delay melting; 2) Deepen the feed section flight to increase material gripping force; 3) Dry the pellet surface to reduce lubrication
핵심 요약
Screw slipping is caused by premature melting; lowering the feed section temperature is the key
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