Injection Molding
13 مشاهدة
Stress Concentration in the Gate Area of PBT Injection-Molded Parts
ظاهرة المشكلة
The stress in the gate area of the product is high, which is obvious under polarized light.
تحليل الأسباب
The temperature gradient and flow history of the gate area are different; the molecular chain orientation in this area is high, the cooling is fast, and the internal stress is large.
الحل
Use a larger gate to reduce the shear and orientation in this area; increase the mold temperature in this area; anneal.
الخلاصة الأساسية
The PBT gate area is an internal stress concentration area.
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