초록 ▼

A system is described for forming hollow spheres containing pressured gas, which includes a cylinder device (14) containing a molten solid material (20) and having a first nozzle (18) at its end, and a second gas nozzle (24) lying slightly upstream from the tip of the first nozzle and connected to a

A system is described for forming hollow spheres containing pressured gas, which includes a cylinder device (14) containing a molten solid material (20) and having a first nozzle (18) at its end, and a second gas nozzle (24) lying slightly upstream from the tip of the first nozzle and connected to a source (26) that applies pressured filler gas that is to fill the hollow spheres. High pressure is applied to the molten metal, as by moving a piston (22) within the cylinder device, to force the molten material out of the first nozzle and the same time pressured gas fills the center of the extruded hollow liquid pipe that breaks into hollow spheres (12a). The environment (54) outside the nozzles contains gas at a high pressure such as 100 atmospheres, the gas is supplied to the gas nozzle (24) at a slightly higher pressure such as 101 atmospheres, and the pressure applied to the molten material (20) is at a still higher pressure such as 110 atmospheres.

대표청구항 ▼

Apparatus for forming hollow spheres containing pressured gas, comprising: a cylinder device having an end, and having a first nozzle at said end; a second gas nozzle lying in said cylinder near said end thereof and directed in line with said first nozzle; a gas source connected to said gas nozzle

Apparatus for forming hollow spheres containing pressured gas, comprising: a cylinder device having an end, and having a first nozzle at said end; a second gas nozzle lying in said cylinder near said end thereof and directed in line with said first nozzle; a gas source connected to said gas nozzle to supply pressured filler gas thereto; means for supplying a molten solid material to said cylinder device to flow out of said first nozzle; walls forming an enclosure around an area outside said first nozzle; and means for maintaining an environment gas at a predetermined pressure of a plurality of atmospheres in said enclosure; said means for supplying molten material applying a pressure to said molten material which is greater than the pressure of said filler gas supplied by said source and the pressure in said enclosure, whereby to produce a molten gas-filled tube that can break up into hollow sphere-like pieces.