Plastic article or earthenware shaping or treating: apparatus – Means for molding powdered metal
Patent
1992-08-14
1994-11-22
Bushey, Charles S.
Plastic article or earthenware shaping or treating: apparatus
Means for molding powdered metal
425352, 425356, 425414, 425418, B22F 300
Patent
active
053663632
ABSTRACT:
To form and compact a powdered metal workpiece (W) having an outer spiral circumference, for example a helical gear, the apparatus has a press mold (21) in a compaction press. This mold can be used for manufacture or for sizing or calibrating workpiece dimensions. A first rotatable and axially movable plunger, punch or ram (16) is movable towards the press mold, and a second rotatable or axially movable plunger or punch or ram (27) is movable through the press mold. To ensure and control rotation of the first (16) plunger, a helical cam system (13, 15) formed by a core element (15) having a spiral outer contour in engagement with a matrix or nut element (13) is provided, the system being coupled to the first plunger (16) by a gear transmission (11, 12) coupled to the matrix element and to the first plunger, punch or ram (16). An additional centering plunger, or core plunger, for example to make an axial bore (3) in the workpiece, or additional concentric portions on the workpiece, such as a smooth hub (4) and a geared hub (2) at the other side, are positioned concentrically to the first plunger and the press mold. The cam system is readily replaceable with spiral surfaces of different spiral angles, so that different workpieces can be easily made without extensive disassembly and re-assembly of the press.
REFERENCES:
patent: 2561735 (1951-07-01), Haller
patent: 3353215 (1967-11-01), Haller
patent: 3394432 (1968-07-01), Laurent
patent: 3677671 (1972-07-01), Martin
patent: 3677672 (1972-07-01), Harrington
patent: 3694127 (1972-09-01), Takahashi et al.
patent: 3843287 (1974-10-01), Fowler
patent: 3891367 (1975-06-01), Signora
patent: 3909167 (1975-09-01), Signora
Patent Abstracts of Japan vol. 7, No. 50 (M-197) (1195) 26, Feb., 1983 & JP-A-57 199 598 (Tokyo Shibaura Denki K.K.) 7 Dec. 1982.
Good Hermann
Rauch Peter
Bushey Charles S.
Werkzeugbau Alvier AG
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