Formation of hollow spherical articles

Details Formation of hollow spherical articles Formation of hollow spherical articles

1974-03-04

1976-08-17

Anderson, Philip

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

65 18, 106 41, 252463, 252466PT, 264 12, 264 13, 264 44, 264 49, 264344, B22F 316, B22F 900, B29D 2700

Patent

active

039751945

ABSTRACT:
Hollow articles, in particular microballoons, hollow fibers and other shapes, are prepared by dispersing or dissolving a soluble film-forming solid in a core solvent which is normally solid but transformable slowly to gas, shaping the blend while molten, cooling to solidify and slowly removing the solid core material as a gas. The film-forming solid migrates to form a shell having the original core shape and a non-uniform cross-section of an outer skin and an inner sponge lining.

REFERENCES:
patent: 1742515 (1930-01-01), Mandell
patent: 2797201 (1957-06-01), Veatch et al.
patent: 3234307 (1966-02-01), Tuttle
patent: 3528809 (1970-09-01), Farnand et al.
patent: 3540884 (1970-11-01), Horbury
patent: 3651182 (1972-03-01), Rosenthal
patent: 3739049 (1973-06-01), Honjo
patent: 3753932 (1973-08-01), Jenkins
patent: 3812224 (1974-05-01), Smith et al.
patent: 3849528 (1974-11-01), Smith
patent: 3859405 (1975-01-01), Horton

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