Injection Molding
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HDPE '2079851475616104452 large dimensional shrinkage
Fenómeno do problema
HDPE part dimensions are overall smaller than expected.
Análise das causas
HDPE shrinkage rate is high and varies greatly with wall thickness and holding pressure; the design value is too low.
Solução
①Modify the mold according to measured shrinkage; ②optimize holding pressure; ③unify measurement aging (crystallization continues); ④leave mold modification allowance for key dimensions.
Conclusão principal
HDPE dimensional management = measured shrinkage + unified aging.
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