Extrusion & Post
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MP screw slipping
Problem Phenomenon
during MP extrusion the screw slips, feed does not advance, output drops sharply
Cause Analysis
MP pellets melt too early in the feed section, forming a lubricating film causing screw slip; feed section temperature too high
Solution
1) lower feed section temperature 10-15°C to delay melting; 2) deepen the feed section flight to increase material grip; 3) dry the pellet surface to reduce lubrication
Key Takeaway
screw slipping is caused by premature melting; lowering feed section temperature is key
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