초록 ▼

A spray gun for applying a film to a workpiece has a spray head provided with an annular nozzle designed to discharge material which is to undergo pneumatic atomization. A second annular nozzle surrounds the pneumatic material discharge nozzle and is designed to discharge atomizing air for pneumatic

A spray gun for applying a film to a workpiece has a spray head provided with an annular nozzle designed to discharge material which is to undergo pneumatic atomization. A second annular nozzle surrounds the pneumatic material discharge nozzle and is designed to discharge atomizing air for pneumatic atomization of the material issuing from the pneumatic material discharge nozzle. The spray head is further provided with an additional material discharge nozzle designed to discharge material which is to undergo hydrostatic atomization. The hydrostatic material discharge nozzle is disposed centrally of, and is surrounded by, the pneumatic material discharge nozzle. The hydrostatic material discharge nozzle forms a first spray of hydrostatically atomized material while the annular nozzles form a hollow conical second spray which surrounds the first spray when both sprays are on simultaneously. The spray gun is capable of creating a spray pattern exhibiting the characteristics of a pneumatically generated spray as well as the characteristics of a hydrostatically generated spray. The material supplied to the pneumatic material discharge nozzle may be the same as that supplied to the hydrostatic material discharge nozzle or each of these nozzles may be supplied with a different component of a two-component substance.

대표청구항 ▼

A method of applying a film to a workpiece, comprising the steps of atomizing a material to generate a first spray within a predetermined space; atomizing a material to generate a second spray which surrounds said space, one of said sprays being generated pneumatically and the other of said sprays b

A method of applying a film to a workpiece, comprising the steps of atomizing a material to generate a first spray within a predetermined space; atomizing a material to generate a second spray which surrounds said space, one of said sprays being generated pneumatically and the other of said sprays being generated hydrostatically; and directing said sprays against said workpiece. A device for applying a film to a workpiece, comprising a spray head; first nozzle means in said head for generating a first spray within a predetermined space; second nozzle means in said head for generating a second spray which surrounds said space, said second nozzle means comprising a substantially circumferentially complete material discharge nozzle and a substantially circumferentially complete air discharge nozzle, said air discharge nozzle surrounding said material discharge nozzle and each of said nozzles surrounding said first nozzle means; material supply means for supplying material to be pneumatically atomized to said second nozzle means and for supplying material to be hydrostatically atomized to said first nozzle means; air supply means for supplying at least one current of atomizing air to said second nozzle means; and control means for said air and material supply means.