Material Drying
3 Aufrufe
HDPE injection molded product bubbles
Problembeschreibung
Internal holes in thick-walled HDPE parts.
Ursachenanalyse
Insufficient holding pressure in thick walls causes vacuum bubbles; regrind with moisture causes air bubbles.
Lösung
①Strengthen holding pressure; ②dry the regrind; ③lower the melt temperature; ④improve venting.
Wichtigste Erkenntnis
First distinguish vacuum bubbles from air bubbles.
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