Processing Machinery
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TPU Temperature Lower Limit
Fenómeno do problema
TPU melt temperature set to 170°C, the product is not fully melted and the surface is rough
Análise das causas
Too low temperature makes plasticization insufficient, especially obvious for hard TPU; 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
Increase melt temperature to above 185°C; hard grades take 200-220°C; check the heating system; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusão principal
The TPU temperature lower limit ensures plasticization according to hardness; 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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