Injection molding apparatus

Claim 1

Molding apparatus for use with thermosetting elastomer materials, said molding apparatus for use in molding machines comprising a movable mold plate and a stationary mold plate, means for actuating the movable mold plate into juxtaposition with the stationary mold plate, means for inserting plasticized elastomer material into cavities in the said mold plates under pressure, said fastening means comprising a separate runner system, the runner system being fabricated from high pressure tubing and being independent of the Platen of the molding machines, said separate runner system further comprising inlet high pressure tubing, manifold high pressure tubing means connected to said inlet high pressure tubing, at least one runner sprue integral to said manifold high pressure means for transferring the plasticized material in the high pressure tubing under pressure to the mold cavities, said fixed mold plates comprising retaining means for retaining said at least one runner sprue of said runner system in said receiving means, said retaining means comprising first screw thread means in said receiving means, said at least one sprue comprising orifice means having second screw threads therein, bushing means for threading into both said receiving means and said orifice means for retaining said at least one sprue in said receiving means, and screw driver slot means at one end of said bushing for use in inserting and removing said bushing means.