Injection Molding
11 조회수
Stress Concentration in the Gate Area of PBT Injection-Molded Parts
문제 현상
The stress in the gate area of the product is high, which is obvious under polarized light.
원인 분석
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.
해결 방법
Use a larger gate to reduce the shear and orientation in this area; increase the mold temperature in this area; anneal.
핵심 요약
The PBT gate area is an internal stress concentration area.
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