Gkn Sinter Metals Gmbh

Branko Cvetkovic

Alfred J Chiesa

David E Lenhart

Hank J Knott

A method and apparatus for forming a powder metal forging (B) includes a die set (AD) for forming the powder metal forging (B) having a first die (A) complementary with a second die (D) in a longitudinal direction (ZC). The die set (A,D) has at least two features () of dimensions with a longitudinal component () and a lateral component (), and at least the lateral component () varies along the longitudinal direction (ZC), at least one such feature () in each die (A,D). Each of the first die (A) and the second die (D) includes a castellated parting interface () dissecting the laterally varying internal longitudinal feature () in the first die from the laterally varying feature () in the second die (D). The castellation () in the dies (A,D) provides forged powder metal parts (B) with features of opposite drafts without trapping the part (B) in the dies (A,D).

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Branko Cvetkovic