Injection Molding
13 مشاهدة
Loosening of Nut Inserts During PBT '2079851475616104452
ظاهرة المشكلة
The overmolded nut inserts loosen or fall off after '2079851475616104452.
تحليل الأسباب
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.
الحل
Fully preheat the inserts to 100-150°C; design the inserts with anti-rotation knurling or slotting; optimize the cooling rate.
الخلاصة الأساسية
PBT overmolding of inserts requires full preheating and anti-rotation design.
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