Method for producing powdered metal compacts with fine holes

Details Method for producing powdered metal compacts with fine holes Method for producing powdered metal compacts with fine holes

1988-08-03

1989-05-30

Lechert, Jr., Stephen J.

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Consolidation of powders

419 2, B22F 314

Patent

active

048349402

ABSTRACT:
Tooling and a method are provided for producing powder metal compacts in which a fine hole is provided through the compact without the need for secondary operations. A top punch and bottom punch are used in an opposing relationship and a stem is provided on the top punch to form the hole through the compact. A resilient member is placed upon the bottom punch opposite the stem. When powder metal is introduced into the die cavity of the press, the powder is compressed by pressing the first punch against the second punch. During this powder compaction process, the stem of the first punch will press through the powder until it engages and penetrates the resilient member. When the first punch and second punch are released, a powder metal compact is formed having a hole provided the entire length therethrough. Such a powder metal compact is especially designed for use as a wire-drawing die.

REFERENCES:
patent: 3996048 (1976-12-01), Fiedler
patent: 4196504 (1980-04-01), Eastman
patent: 4383854 (1983-05-01), Dembowski et al.
patent: 4698205 (1987-10-01), Oskarsson et al.
patent: 4726927 (1988-02-01), Morgan et al.

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