Method for manufacturing an internal core for injection mold...

Metal working – Method of mechanical manufacture – Obtaining plural product pieces from unitary workpiece

Reexamination Certificate

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Details

C029S416000, C029S463000, C029S557000, C029S558000, C425S542000, C700S095000, C700S117000

Reexamination Certificate

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07398585

ABSTRACT:
An internal core is separated along a horizontal plane delineated at the transition point between the tapered wall portion and the parallel wall portion of the core to divide the core into a tapered wall component part manufactured by a WEDM process to obtain the desired shape and configuration and a parallel wall component part manufactured by a right angle milling or WEDM with a right angle manufacturing process to obtain the desired shape and configuration. The tapered and parallel wall component parts are joined together to form the desired internal core.

REFERENCES:
patent: 4364160 (1982-12-01), Eiswerth et al.
patent: 4559684 (1985-12-01), Pryor
patent: 5369870 (1994-12-01), Ouchi et al.
patent: 5449282 (1995-09-01), Brown et al.
patent: 5711074 (1998-01-01), Harimoto et al.

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