Molds & Tooling
6 visualizações
PA66 cooling crystallization control
Fenómeno do problema
PA66 product dimensions continue to change after demolding, still shrinking after 48 hours
Análise das causas
PA66 crystallinity is high and crystallization rate is affected by cooling; when cooling is uneven, post-crystallization continues, dimensions drift over time; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solução
Mold temperature 80-120℃ ensures sufficient and uniform crystallization; precision-dimension parts conditioned after demolding to accelerate dimensional stabilization; inspection performed in the conditioned state; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusão principal
Sufficient and uniform crystallization is the premise of dimensional stability, conditioning is the accelerating means; after confirming effectiveness, fix 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
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!