Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1976-12-06
1977-12-20
Gilden, Leon
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
29420, 264266, 425405H, B22F 100, B29D 300
Patent
active
040639410
ABSTRACT:
Method for loading and unloading of isostatic presses of the type wherein pre-formed, or equivalent, shapes of powdered metal, ceramics, clay and the like are compressed under very high pressures to form compacts suitable for use as such or for subsequent operations, such as forging, machining, firing or the like as may be appropriate for the particular powdered material. Method is disclosed in connection with the use of an isostatic press having a container including a cylindrical sleeve of elastomeric material for receiving the objects to be compressed under pressure of hydraulic fluid applied to exterior of the container. Bodies of rigid or elastomeric material which also may serve as plugs for the ends of the sleeve are movable from inside to outside the press to positions to receive a pre-form. Method comprises loading of a pre-form onto one of the bodies or plugs, pressing the other onto the pre-form to hold it between the bodies and then moving both bodies with the pre-form held therebetween into the press where it is held by the bodies during the compressing operation which converts the pre-form into a compact. The press is then opened and the two bodies are moved out of the press, holding the compact and placing in a position for removal from the press. Method is of particular value in handling pre-forms which are elongated and unstable when standing on end under influence of gravity alone, the bodies or plugs manipulated according to the method being effective to hold such pre-forms in upright position for loading and compressing and unloading.
REFERENCES:
patent: 2449515 (1948-09-01), Seelig
patent: 3172153 (1965-03-01), Loomis et al.
patent: 3173283 (1965-03-01), Vogtmann
patent: 3184944 (1965-05-01), Sibler
patent: 3239591 (1966-03-01), Wendt
patent: 3454997 (1969-07-01), Ligon et al.
patent: 3698843 (1972-10-01), Bowle
patent: 3820934 (1974-06-01), Stigler
patent: 3956452 (1976-05-01), Saito
Bock James D.
Gilden Leon
National Forge Company
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