Production & Quality
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PTFE Improper Cooling Rate
Fenómeno do problema
Too fast cooling after PTFE sintering causes deformation and cracking, too slow cooling gives low efficiency and abnormal crystallinity.
Análise das causas
Cooling rate ≤30℃/h is a specification requirement; too fast cooling generates thermal stress causing deformation; cooling rate relates to sheet crystallinity and thus affects physical properties; the choice of furnace cooling versus air cooling affects the rate.
Solução
①Control cooling rate ≤30℃/h; ②Furnace cooling or controlled air cooling; ③Cooling curve recording and monitoring; ④Trace cooling parameters for deformed parts.; After adjustment, continuously sample to verify the effect, confirm stability before resuming mass production
Conclusão principal
PTFE cooling rate 30℃/h is the quantified standard for preventing stress; crystallinity management runs through the entire cooling process; curve records support traceability.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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