Molds & Tooling
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PA66 demolding difficulties
Fenómeno do problema
Products stick to the mold and are scratched, ejection whitening and deformation occur, deep-cavity parts are especially severe, and the cycle is forced to be extended
Análise das causas
Three causes make PA66 part demolding resistance large: mold temperature too high with insufficient cooling, insufficient draft angle or insufficient polishing, and excessive holding pressure; crystallization shrinkage tightly grips the core and aggravates mold sticking
Solução
①Extend cooling and appropriately lower mold temperature; ②Increase draft angle and polish the cavity; ③Reduce holding pressure and clamping interference; after adjustment, take continuous samples to verify the effect, confirm stability before resuming mass production
Conclusão principal
PA66 demolding problems are investigated along the three lines of cooling, draft angle, and pressure; deep-cavity parts often need all three optimized simultaneously; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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