Space charge electrostatic coating method and apparatus

Details Space charge electrostatic coating method and apparatus Space charge electrostatic coating method and apparatus

1991-02-19

1992-10-20

Lawrence, Evan

Coating processes

Direct application of electrical, magnetic, wave, or...

Electrostatic charge, field, or force utilized

118626, 118635, B05D 104, B05B 510

Patent

active

051568802

ABSTRACT:
A method and apparatus for electrostatically spraying conductive coating material onto objects, primarily large extended objects, by charging with a relatively large charge the space behind the surface to be coated. With hollow objects, such as automobile bodies, the space within the body is charged. The space is charged by spraying an electrostatically charged atomized water mist into the space which evaporates charging the space and object surface. An electrostatic field is produced between the surface and the gun which, along with the supply of conductive material to which it is connected, is grounded. The gun discharges a film of coating which is atomized into droplets. The field inductively charges the film fringe and thus the droplets which are then attracted onto the large charged surface.

REFERENCES:
patent: 2662833 (1953-12-01), Helmuth

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