Spray device and method for powder coating material

Details Spray device and method for powder coating material Spray device and method for powder coating material

1996-01-04

1997-11-11

Lusignan, Michael

Coating processes

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

Electrostatic charge, field, or force utilized

427485, 118626, 118627, 118629, B05D 104, B05D 106, B05B 5025

Patent

active

056861494

ABSTRACT:
A spray device and method for the coating of objects with powder coating material. A high voltage electrode or several electrodes are located on only one side of the coating material stream in the vicinity of a spray orifice for electrostatically charging the coating material. A first flow of compressed air is directed over the electrodes to keep the coating material from accumulating on the electrode and to shape the envelope of the sprayed coating material. A second stream of compressed air is directed at the stream of coating material to counteract the deflection of the stream by the first flow and by the effects of the high voltage. Better coating efficiency (reduced loss of sprayed powder) is achieved than with electrodes arranged on both sides of the coating material stream.

REFERENCES:
patent: 3344992 (1967-10-01), Norris
patent: 3747852 (1973-07-01), Nord et al.
patent: 3952951 (1976-04-01), Raetz et al.
patent: 4574092 (1986-03-01), Gourdine
patent: 4735360 (1988-04-01), Kirchner et al.

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