Molds & Tooling
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TPU multi-hardness material switching
Fenómeno do problema
After switching between TPUs of different hardness, process fluctuations are large.
Análise das causas
TPUs of different hardness have obvious differences in fluidity and temperature windows; continuing to use the old process causes filling or demolding problems; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solução
①reset the temperature window according to the new grade; ②verify filling and demolding states; ③record process cards for each grade; ④fully clean when changing material; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusão principal
TPU grade switching requires re-calibration of the process; hardness is the core variable affecting processability; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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