Importance

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Abstract

An apparatus for forming an opening or the like in an injection molded part formed in a molding cavity defined between core block and cavity block of a mold, the core and cavity blocks movable relative to each other between open and closed positions, the molding cavity defined between the cavity and core blocks in the closed position, the apparatus comprising an elongate segmented pin insertable in the mold, having axially aligned segments when the blocks are in the closed position, and the segments separable from each other as the mold opens, in the closed position the pin extending from an external portion of the mold to the molding cavity, the pin being actuatable by activation means to axially extend into the molding cavity so as to form an opening or the like in the molded part formed in the molding cavity. The elongate segmented pin comprising a first segment mounted on an external portion of the core block connected to activation means for axially extending the pin through the molding cavity, a second middle segment extending through a portion of the cavity block and a third lead segment which when in the closed position is extendable by the activation means through the molding cavity such that the lead end of the pin forms a through opening in a molded part formed in the molding cavity, the second and third segments staying with the cavity block and separating from the first segment as the core and cavity block move from the closed to the open position.

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First Claim