Processing Machinery
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PCL internal stress cracking
Fenómeno del problema
PCL products have large internal stress, crack during use or storage, and suffer structural failure.
Análisis de la causa
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
Solución
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
Conclusión clave
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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