Processing Machinery
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PVC Melt Actual Measurement
Fenómeno do problema
Temperature controller shows 185℃ but products still show degradation signs
Análise das causas
Displayed temperature deviates from actual melt temperature, shear heat makes actual temperature higher; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based solely on experience.
Solução
Regularly measure actual air-shot melt temperature; temperature records based on actual measurement; calibrate when deviation large; 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
PVC must be based on actual measured melt temperature; after confirming effectiveness, fix 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 later
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