Patent ID: 7309227

Claim:
A polymer injection mold for molding a polymeric injection molded part having a parting line with at least one re-entrant surface on both sides of said parting line comprising: a. a stationary part of the mold attached to a polymeric injection molding machine; b. a movable part of the mold being removably mated with the stationary part of the mold at the parting line; c. said stationary part of the mold incorporated with at least one slide bar projection to define re-entrant surfaces of said injection molded polymeric part; d. said movable part of the mold incorporated with at least one slide bar projection to define re-entrant surfaces of said injection molded polymeric part; e. said slide bar projections rigidly attached to slide bars that pass through slots in side walls of said stationary part and said movable part of the mold, respectively, with a clearance sufficient to prevent leakage of plasticized injected polymer; f. each of said slots in side walls of said stationary part of the mold and said movable part of the mold being inclined to mold centerline; g. said slide bars passing through a side wall of said stationary part of the mold being removably connected to at least one pull bar, wherein said pull bar is attached on its distal end to said movable part of the mold; wherein displacing said movable part of the mold from said stationary part of the mold removes said molded polymeric part from said stationary part of the mold, and pulls said pull bars, thereby pulling said slide bars through said slots of said stationary part of the mold, displacing slide bar projections in a direction relative to said centerline in order to clear re-entrant surfaces of said injection molded polymeric part; h. means for pushing slide bars through said slots of said movable part of the mold thereby displacing slide bar projections in a direction relative to said centerline in order to clear re-entrant surfaces of said injection molded polymeric part; whereby said injection molded polymeric part with at least one re-entrant surface on both sides of said parting line is produced and removed from the injection mold without damage to said re-entrant surfaces.