Extrusion & Post
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POM annealing temperature
Fenómeno del problema
POM precision parts are out of tolerance after annealing instead
Análisis de la causa
Too high annealing temperature causes recrystallization, while too low results in insufficient stress relief; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solución
Control annealing at 100-130°C×2-4 hours; cool slowly after annealing; re-measure dimensions after annealing; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Annealing temperature and time are executed according to the specification, and re-measurement is mandatory after annealing; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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