Neck ring and method of making for a glass container forming machine

A method of making a neck ring for molding a glass container neck finish including at least one closure attachment feature, which includes the steps of:

• (a) providing two semi-annular neck ring halves each consisting essentially of a neck ring insert of wear-resistant metal construction, and a neck ring body of heat-conductive metal construction different from said wear-resistant metal construction,
• (b) forming said neck ring inserts as separate preforms,
• (c) forming said neck ring bodies around said neck ring insert preforms to thereby embed said inserts in said bodies,
• (d) providing on said inserts a first surface portion for molding the at least one closure attachment feature on the neck finish, and
• (e) forming a second surface portion on said bodies for molding those portions of the neck finish that exclude the at least one closure attachment feature.