Method to produce large, uniform hollow spherical shells

Details Method to produce large, uniform hollow spherical shells Method to produce large, uniform hollow spherical shells

1983-09-26

1985-10-22

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Coated particles

65 214, 65 22, 264 5, 264 10, 264 43, 264 55, 264131, 264574, 264DIG6, 425 6, B29C 600

Patent

active

045487677

ABSTRACT:
Large, uniform hollow spherical shells are produced by forming uniform size drops of heat decomposable or vaporizable material, evaporating the drops to form dried particles, coating the dried particles with a layer of shell forming material, and heating the composite particles to melt the outer layer and decompose or vaporize the inner particle to form an expanding inner gas bubble which expands the outer layer. By cycling the temperature and pressure on the hollow shells, spherical shells with uniform walls are produced.

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