Apparatus for manufacturing pressed powder body

Details Apparatus for manufacturing pressed powder body Apparatus for manufacturing pressed powder body

1996-04-29

1999-12-21

Mackey, James P.

Plastic article or earthenware shaping or treating: apparatus

Means for molding powdered metal

425352, 425355, 425356, 425414, 425415, 425418, B22F 302

Patent

active

06004120&

ABSTRACT:
An apparatus for manufacturing a pressed powder body has a die assembly comprising an upper die and a lower die, for pressing an unpressed powder body of a material powder filled on a pressing surface of the lower die, into a pressed powder body between the upper die and the lower die, at least one of the upper die and the lower die being vertically movable to press the unpressed body, and a powder increasing mechanism for increasing an amount of the material powder locally in the unpressed powder body. The powder increasing mechanism comprises at least one of the upper die and the lower die, the at least one of the upper die and the lower die comprising a first die member for pressing a first portion of the unpressed powder body at a first time and a second die member for pressing a second portion of the unpressed powder body at a second time which is different from the first time.

REFERENCES:
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patent: 4818201 (1989-04-01), Howard
patent: 5037287 (1991-08-01), Hirai
patent: 5259744 (1993-11-01), Take
patent: 5326242 (1994-07-01), Katagiri et al.
patent: 5366363 (1994-11-01), Good et al.
patent: 5378416 (1995-01-01), Kishi et al.
patent: 5698149 (1997-12-01), Hinzmann
Patent Abstracts of Japan, vol. 97, No. 7, Jul. 31, 1996 re Japanese Publication 08-067905 dated Mar. 12, 1996.
Patent Abstracts of Japan, vol. 18, No. 98, Feb. 17, 1994 re Japanese Publication 05-302102 dated Nov. 16, 1993.

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