Injection Molding
10 Aufrufe
Loosening of Nut Inserts During PBT '2079851475616104452
Problembeschreibung
The overmolded nut inserts loosen or fall off after '2079851475616104452.
Ursachenanalyse
The inserts are insufficiently preheated, and PBT shrinks too much during cooling, so the wrapping is not tight; the insert surface has no anti-rotation structure.
Lösung
Fully preheat the inserts to 100-150°C; design the inserts with anti-rotation knurling or slotting; optimize the cooling rate.
Wichtigste Erkenntnis
PBT overmolding of inserts requires full preheating and anti-rotation design.
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