• Cold Slug Well in Plastic Mold Design

    Cold slug well is a very imporant part of plastic mold design. It is  defined as the small nub of plastic that cools and solidifies inside the nozzle tip during the cooling cooling phase of the injection cycle. It is designed to store cold slug  caused intermittently by the nozzle due to heat loss and low temperature. Cold slugs could clog or slow down the material flow in runner and cavity and cause cold scars or cold marks on plastic part. The cold slug well is usually placed at the end of primary runner. When the branch runner is too long, cold slug well should be designed as well to store the front plastic cooled by mold. Cold slug well is a very imporant part of gate system and it should not be neglected at mold design.   For molded plastic part made from flame-retardant PC, the design of cold well determines the the quality of…

    Mold design January 23, 2020


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