Extrusion & Post 10 조회수

Snake-like curved lines appear on the product from the gate

문제 현상

Snake-like curved lines appear on the product from the gate, the melt advances in a snake-like winding manner, the surface is rough and irregular

원인 분석

Injection speed too fast, the melt produces jetting when passing through the gate Gate size and cavity ratio improper Gate position faces an open cavity Melt temperature too low, high viscosity, severe shear when passing through the gate Insufficient mold venting

해결 방법

Reduce the initial injection speed, adopt slow-fast-slow mode Increase gate size to reduce shear Change the gate position to side feed to avoid facing the open cavity directly Appropriately increase the melt temperature to 170-230°C Improve mold venting

핵심 요약

Jetting requires reducing the initial injection speed and adjusting the gate

jettingsnake-like linesgateinjection speed

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Snake-like curved lines appear on the product from the gate

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