Injection Molding 5 조회수

PVA injection cold slug marks

문제 현상

PVA injection molded product shows cold slug marks near the gate

원인 분석

Nozzle temperature on the low side causes residual material from the previous shot to cool and solidify in the nozzle; cold slug well design insufficient to accommodate the cold slug; injection pressure insufficient

해결 방법

1) Raise nozzle temperature to 140-200°C; 2) Mold design with a sufficiently large cold slug well; 3) Ensure fresh melt at the nozzle front before each injection; 4) Increase injection pressure to push the cold slug through the gate

핵심 요약

Cold slug marks are caused by solidified residual material in the nozzle; raising nozzle temperature and cold slug well design are the key

PVA injectioncold slug marknozzle temperaturecold slug wellinjection pressure

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PVA injection cold slug marks

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