Importance

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Abstract

A method and a system for stabilizing the core of a mold when injection molding plastic, wherein each production cycle comprises the steps of: (a) injecting a first plastic through a first gate into a chilling cavity with a core so that the cavity is not filled. (b) cooling the injected first plastic in the chilling cavity to thereby solidify the first plastic. (c) injecting, subsequent to injecting the first plastic, but not necessarily subsequent to the first plastic becoming completely solidified, a second plastic through a second gate into the chilling cavity whereby the cooled injected first plastic impedes any movement of the core caused by injecting the second plastic and whereby the injected second plastic fills the cavity and fuses with the previously injected plastic. (d) cooling the injected second plastic in the chilling cavity to thereby solidify the fused unit. (e) ejecting the solidified molded unit.

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First Claim