Patent ID: 6651949
Filing Date: 2003-11-25
Classification: B28B

Abstract:
A mold assembly comprising:an inner core and an outer jacket, at least a portion of which is relatively movable between an opened and a closed position, said core and jacket defining a hollow region for receiving cast material to produce a cast member; a mandrel assembly mounted upon an interior surface of said movable portion, for forming an opening in a cast member when said movable portion is closed; said mandrel assembly including means for receiving and supporting an annular-shaped gasket having an outer embedment end and an inner pipe engaging end, said pipe engaging end being supported by said mandrel assembly; said mandrel assembly being withdrawn through said gasket when the cast material has cured and said movable portion is moved to the open position thereby forming an opening in said cast member in which the embedment end of said gasket is embedded therein and the pipe engaging end extends radially inwardly for engagement with a pipe extended therein to form a water-tight joint therebetween; wherein the axial length of the mandrel assembly is less than the distance between opposed interior surfaces of said core and said jacket whereby a free end of said mandrel assembly is displaced from an opposed surface of said core member to form a gap region, whereby the cast material enters the gap region thereby forming a block out area which may be selectively broken away to permit insertion of a pipe therethrough.