Plastic article or earthenware shaping or treating: apparatus – Means for molding powdered metal
Patent
1992-01-30
1992-10-20
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Means for molding powdered metal
425352, 425354, 425406, 425412, B22F 300
Patent
active
051568543
ABSTRACT:
In a press forming apparatus for forming spiral parts, a plurality of first connecting rods are mounted on a lower end of a divided core divided from a die in shifting relation to each other in a winding direction of vortex. The plurality of first connecting rods are supported by a vertically movable core plate, while a plurality of second connecting rods are mounted on a lower end of a lower punch in shifting in position relation to each other. The second connecting rods extend respectively through bores in the core plate, and are supported by a lower punch plate movable vertically and arranged below the core plate. Further, the first and second connecting rods extend through a stationary block. The stationary block is arranged between the die and the core plate, for restricting downward movement of the lower punch and the divided core.
REFERENCES:
patent: 2254107 (1941-08-01), Miller et al.
patent: 2509783 (1950-05-01), Richardson
patent: 3132379 (1964-05-01), Crane
patent: 3868201 (1975-02-01), Jacobson et al.
patent: 4153399 (1979-05-01), DeSantis
patent: 4392800 (1983-07-01), Apuzzo
English abstract of Japanese Laid-Open Patent No. 61-232019.
English abstract of Japanese Laid-Open Patent No. 2-61001.
Bushey Scott
Hitachi Powdered Metals Co. Ltd.
Woo Jay H.
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