Metal deforming – By extruding through orifice – Expressing plural products
Patent
1976-07-13
1977-09-27
Larson, Lowell A.
Metal deforming
By extruding through orifice
Expressing plural products
72468, B21C 2502
Patent
active
040502791
ABSTRACT:
Apparatus for deforming a workpiece so as to produce an elongated product, which product may be composed of one or more articles and has an overall cross-sectional shape differing from that of the workpiece, includes a specially configured extrusion die. The die provides a wall surface which converges toward an entrance end of one or more die apertures, the wall surface having a shape selected to build up pressure smoothly and substantially uniformly within the material of the workpiece as the workpiece is forced against the wall surface, such that substantially all of the material of the workpiece first attains the overall cross-sectional shape of the product in substantially the same cross-sectional plane of the die at the entrance end of the die aperture or apertures, and such that redundant work is minimized. Examples of such a die, and an exemplary method of extrusion to form such a product, are also disclosed.
REFERENCES:
patent: 2408627 (1946-10-01), Green
patent: 2660302 (1953-11-01), Gersman
patent: 3008187 (1961-11-01), Slade
patent: 3113676 (1963-12-01), Harkenrider
patent: 3765222 (1973-10-01), Lundback
patent: 3973428 (1976-08-01), Lugosi
Larson Lowell A.
Rosen A. S.
Western Electric Company Inc.
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