Molds & Tooling
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PET mold temperature controller maintenance
Fenómeno do problema
The cooling capacity of the preform mold gradually declines, and the molding cycle is forced to be extended
Análise das causas
Scaling of the cooling water channels and reduced heat exchange efficiency of the mold temperature controller cause the cooling capacity to decay as a gradual process; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solução
Regularly clean and descale the water channels; maintain the mold temperature controller heat exchanger; include cooling capacity in the inspection; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record the parameter changes, so as to locate effective measures
Conclusão principal
Cooling capacity inspection is the prerequisite for cycle stability; 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 subsequent similar problems
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