Importance

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Abstract

A nylon cable tie having a head and a strap terminating in a tip is formed in a mold cavity defined between a first mold part combined wish a second mold part by injecting molten nylon material into the mold cavity through an insulated runner system and a gate that converges from the runner system toward the mold cavity and does not have a hot tip adjacent thereto. The mold parts are separated while retaining a portion of the head in a head region in the first mold part and a portion of the tip in a tip region in the second mold part, in order to separate the head from the second mold part, to separate the tip from the first mold part, and to separate a major portion of the strap from the first and second mold parts. The mold parts are further separated while retaining said portion of the head in the head region to thereby remove said portion of the tip from the second mold part. The head is ejected from the head region by protracted ejector pins that penetrate the head region from within the first mold part. A component containing a nozzle coupled to a source of compressed air and positioned closely adjacent the head region is protracted from the first mold part and pushes on the strap to push the ejected head of the cable tie away from the ejector pins. The cable tie is then ejected from between the mold parts by imparting against the ejected head of the cable tie a forceful stream of compressed air directed from the nozzle.

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First Claim