Processing Machinery
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TPU Screw Slipping
Fenómeno do problema
TPU screw slips during plasticization and does not feed material
Análise das causas
TPU melt has strong lubricity, and the material slips in the screw channel resulting in poor plasticization; when troubleshooting on site, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
Solução
Screw designed with mixing; back pressure appropriately increased; feeding section temperature optimized; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Conclusão principal
Screw slipping relies on screw design and back pressure; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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