Patent ID: 6767201
Filing Date: 2004-07-27
Classification: B29C,B29L,Y10S

Abstract:
An apparatus for manufacturing plastics items provided with external undercuts, comprising at least one compression molding unit, which is composed of an upper male mold part comprising a plug and of a lower female mold part aligned, along a vertical axis, with said male mold part, means for actuating said mold parts between a spaced position, at which a dose of plastics sufficient to form an item is deposited in the female mold part, and a mating position for producing the compression molding of an item, said male mold part comprising a plug and an ejector that is associated to with said plug in order to remove said molded item when said mold parts are in said spaced position, further comprising a bushing that is arranged externally and coaxially to said plug, a plurality of sectors for forming raised portions and undercuts on the outer surface of said item, said sectors being coupled axially to said bushing and being able to expand with respect to the plug, means for actuating said sectors between a position that produces mating with said plug in order to allow the compression molding of said item and the molding of said raised portions and undercuts, and a spaced position in order to allow to remove said molded item from said plug.