Processing Machinery
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TPU screw slipping
Fenómeno do problema
During plasticization the screw slips and does not feed material, and output drops sharply.
Análise das causas
Fault or bridging at the hopper feeding position; too high temperature at the rear of the barrel softens and sticks the pellets; too fast screw retreat speed also causes slipping; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solução
①remove obstacles at the feeding position; ②reduce the temperature at the rear of the barrel; ③reduce the screw retreat speed; ④check pellet shape and drying state; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusão principal
Screw slipping is a physical feeding obstacle; feed zone temperature management is the key to preventing TPU slipping; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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