Injection Molding
3 조회수
Linear marks appear around multiple gates or holes of the product
문제 현상
Linear marks appear around multiple gates or holes of the product, strength significantly lower than normal areas, color at the weld line differs from the surroundings
원인 분석
Before confluence of melt from multiple gates, temperature has dropped, poor fusion
Injection speed on the low side, insufficient melt front temperature
Insufficient mold venting, gas at the weld hinders fusion
Melt flow path too long, large temperature drop
Excessive lubricant reducing melt adhesion
해결 방법
Increase injection speed to keep the melt front at high temperature
Appropriately raise barrel temperature to the high side of 170-230°C
Add vent grooves or overflow wells at the weld line
Shorten the flow path or adjust gate position
Reduce lubricant addition
핵심 요약
Weld lines require increasing confluence temperature, improving venting and optimizing gates
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