Extrusion & Post
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DSTDP screw slipping
Problem Phenomenon
During DSTDP extrusion, the screw slips, feed does not advance, output drops sharply
Cause Analysis
DSTDP granules melt too early in the feeding section forming a lubricating film causing screw slipping; feeding section temperature too high
Solution
1) Lower feeding section temperature 10-15°C to delay melting; 2) deepen feeding section flight to increase material gripping force; 3) dry granule surface to reduce lubrication
Key Takeaway
Screw slipping is caused by premature melting; cooling the feeding section is key
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