Shell forming system

Details Shell forming system Shell forming system

1984-08-15

1987-02-17

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By impinging or atomizing with gaseous jet or blast

65 214, 222 1, 222420, 222422, 239 8, 239424, 264 13, 264574, B29B 910, C03B 1910, B67D 500

Patent

active

046438548

ABSTRACT:
An apparatus is provided for forming gas-filled spheres of metal, glass or other material, which produces spheres (12) of uniform size and wall thickness in a relatively simple system. The system includes concentric nozzles, including an inner nozzle (18) through which gas flows and and an outer nozzle (20), which jointly define an annular passageway (50) through which a liquid flows. The flow rates are adjusted so that the gas flows at greater velocity than does the liquid, out of their respective nozzles, e.g. three times as great, in order to produce an extrusion (30) which undergoes axisymmetric oscillations resulting in the pinch off into hollow spheres with very uniform spacing. The system is useful not only where gas-filled spheres are required, but also is useful to accurately control the dispensing of solid, liquid, or gaseous materials.

REFERENCES:
patent: 4166084 (1979-08-01), Shea
patent: 4303431 (1981-12-01), Torobin
patent: 4344787 (1982-08-01), Beggs et al.
R. J. Calliger et al., "Hollow Drop Production by Injection of Gas Bubbles into a Liquid Jet", Rev. Sci. Instrum., vol. 48, No. 7, 7-1977, pp. 846-851.

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