Material Drying
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TPU Hardness Batch
Fenómeno del problema
Different batches of the same TPU grade have different hardness
Análisis de la causa
Raw material batch differences and drying state affect hardness performance; 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
Solución
Incoming inspection of hardness; unified drying state; fine-tune the process by batch; 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
Conclusión clave
Hardness consistency is controlled from incoming material and drying; 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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