Method of producing shaped objects

Details Method of producing shaped objects Method of producing shaped objects

1976-10-19

1977-12-27

Engle, Samuel W.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

204281, B22F 100, C25D 100

Patent

active

040653030

ABSTRACT:
In the disclosed method of forming shaped objects by a powder-metallurgical rocedure, a dummy or sample of a meltable material, such as wax, is prepared which has generally the configuration of the ultimate shaped object to be produced. A self-supporting layer is then electroformed on the dummy object to enclose the latter. The dummy object of wax or the like is then removed by melting, whereby a hollow space or cavity is formed which is defined by the layer and which corresponds to the configuration of the dummy object. Metallic powder of a type used in powder-metallurgical procedures is then filled into this space under vacuum and is subjected to hot isostatic pressing or compaction to densify and compact the powder, thereby to form the ultimate shaped object. The electroformed layer is thereafter removed and, if necessary, the object is further finish-worked in any suitable manner.

REFERENCES:
patent: RE28301 (1975-01-01), Havel
patent: 2538160 (1951-01-01), Milton
patent: 3419935 (1969-01-01), Pfeiler
patent: 3554874 (1971-01-01), Mattia
patent: 3623313 (1971-11-01), Havel
patent: 3723585 (1973-03-01), Nussbaum
patent: 3724050 (1973-04-01), Velten
patent: 3772009 (1973-11-01), Isaksson
patent: 3841870 (1974-10-01), Hamjian
patent: 3893852 (1975-07-01), Bergman

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