Method and apparatus for the spray-coating of the inside of tubu

Details Method and apparatus for the spray-coating of the inside of tubu Method and apparatus for the spray-coating of the inside of tubu

1980-04-04

1982-08-10

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Electrostatic type

Having plural exit openings

118308, 118622, 118DIG10, 134166C, 239698, 239143, 239290, 239405, 239436, 239499, 239551, 239565, 366101, 427 28, 427181, 427239, 427286, B05C 702

Patent

active

043434363

ABSTRACT:
A method and apparatus are disclosed for the spraycoating of the interior of a hollow body, one region of which, e.g. a seam, must receive a heavier coating than the remainder of the surface to be sprayed. A single spray coating operation is performed, in which a relatively heavy spray jet is concentrated on the seam and a relatively thin cloud of coating material is used to coat the entire interior surface of the body. Preferably, a cloud of electrostatically charged coating material is formed by an atomizer fed by a feed conduit from which a certain amount of coating material is diverted to be formed into the relatively highly concentrated spray jet directed at the seam. The relatively high-velocity particles of material of the spray jet which is concentrated onto the seam and the relatively low-velocity particles of material of the coating cloud together produce on the seam a thinner layer of material than would normally suffice and which, nonetheless, adheres well.

REFERENCES:
patent: 3081947 (1963-03-01), Walter
patent: 3248606 (1966-04-01), Faser
patent: 3422795 (1969-01-01), Smith
patent: 3678336 (1972-07-01), Winkless
patent: 3871583 (1975-03-01), Kellert
patent: 4088268 (1978-05-01), Vohringer
patent: 4171096 (1979-10-01), Welsh et al.
German Publication 21 27 406, Feb. 3, 1972.

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