Molds & Tooling 4 조회수

Cold slug marks appear on the product surface

문제 현상

Cold slug marks appear on the product surface, local poor gloss or hard lumps, usually near the gate

원인 분석

Nozzle temperature too low, producing cold slug Front zone barrel temperature set low Mold sprue or runner temperature low, cold slug retained Mold opening gap too large, cold slug pulled into the cavity Screw pullback distance too large, producing cold slug

해결 방법

Increase nozzle temperature to prevent cold slug Appropriately increase the front zone barrel temperature Increase sprue and runner dimensions to reduce cold slug retention Reduce the mold opening gap Adjust the screw pullback distance

핵심 요약

Cold slug marks require increasing nozzle temperature and reducing cold slug sources

cold slug marknozzle temperaturecold slug

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Cold slug marks appear on the product surface

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