Polymeric injection mold with retractable bars for producing...

Plastic article or earthenware shaping or treating: apparatus – Shaping surface including means to release or remove product... – By movable mold sections

Reexamination Certificate

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Details

C425S556000, C425S577000, C425SDIG058

Reexamination Certificate

active

11209315

ABSTRACT:
A polymeric injection mold has stationary and movable parts mating at a parting line. The polymeric part has one or more re-entrant surfaces on both sides of the parting line, wherein the re-entrant surfaces are defined by slide bar projections inserted into the mold. The slide bar projections are attached to slide bars that pass through tapered slots in the side walls of the stationary and movable sides of the mold and are inclined at an angle to the centerline of the mold. The slide bars of the stationary side of the mold are removably connected to pull bars, wherein the pull bars are rigidly attached at their opposite ends to the movable side of the mold. When the movable side of the mold is withdrawn, the injection molded part is pulled out of the stationary side of the mold when the slide bar projections clear the re-entrant surfaces.

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Turner, Ryan Anthony,Tapered LIGA Mold Insert, Louisiana State University, 2001 thesis.

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