Processing Machinery
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PCL internal stress cracking
Fenómeno do problema
PCL products have large internal stress, crack during use or storage, and suffer structural failure.
Análise das causas
PCL crystallization shrinkage internal stress; excessive cooling; excessive holding pressure; structural design sharp corners; environmental stress.；During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solução
①Cooling rate control; ②Holding pressure optimization; ③Structural fillets; ④Annealing treatment; ⑤Environmental assessment.；After adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
PCL internal stress management runs through process and structure; annealing is an effective release; environmental assessment prevents cracking.；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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