Injection Molding
3 Aufrufe
HDPE '2079851475616104452 large dimensional shrinkage
Problembeschreibung
HDPE part dimensions are overall smaller than expected.
Ursachenanalyse
HDPE shrinkage rate is high and varies greatly with wall thickness and holding pressure; the design value is too low.
Lösung
①Modify the mold according to measured shrinkage; ②optimize holding pressure; ③unify measurement aging (crystallization continues); ④leave mold modification allowance for key dimensions.
Wichtigste Erkenntnis
HDPE dimensional management = measured shrinkage + unified aging.
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