Stack mold

A stack mold is a type of plastic injection mold designed for high production runs. Stack molds generally have one cavity and multiple cores, and have the ability to do multiple operations in the molding cycle. Purging stack molds is challenge because the mold must be closed during the process. Ultra Purge BP is a concentrated grade purging compound that is 100% moldable and designed to purge stack molds and facilitate fast color changes.