Powder charger and sprayer

Details Powder charger and sprayer Powder charger and sprayer

1999-05-14

2000-07-04

Morris, Lesley D.

Fluid sprinkling, spraying, and diffusing

Processes

Including electrostatic charging

239696, 239706, A01G 2310, B05B 300

Patent

active

060826282

ABSTRACT:
A powder spray gun, and method for using same, is disclosed. The powder gun includes a corona discharge tip and mesh screen within the passage for powder flow. A potential is applied to the corona discharge tip, resulting in an electric field between the corona discharge tip and mesh screen. This electric field efficiently charges powder particles passing through the spray gun, but the mesh screen blocks most of the free ions that are generated by the corona discharge tip. Any free ions that pass through the mesh screen are captured by a conductive end piece on the spray gun. A potential difference is applied between the end of the spray gun and the workpiece to guide the charged powder particles to the workpiece.

REFERENCES:
patent: 3659151 (1972-04-01), Fabre
patent: 3767116 (1973-10-01), Clausen et al.
patent: 3791579 (1974-02-01), Cowan
patent: 4377603 (1983-03-01), Itoh et al.
patent: 4779564 (1988-10-01), Keifer et al.
patent: 4991774 (1991-02-01), Kelly
patent: 5012195 (1991-04-01), Harrold
patent: 5378957 (1995-01-01), Kelly
patent: 5622313 (1997-04-01), Lader et al.
patent: 5749529 (1998-05-01), Kazama et al.
patent: 5765761 (1998-06-01), Law et al.
patent: 5924631 (1999-07-01), Rodrigues et al.
Colbert, "Modern Coating Technology," Noyes Data Corporation (USA), p. 222-227.
Garner et al., "Electrostatic Painting of Plastics I: Electrical Properties of Plastics and Primers," Journal of Coatings Technology, vol. 63 (No. 803), p. 33-37, (Dec. 6, 1991).
Elmoursi et al., "Electrostatic Painting of Plastics II: Electric Field Effects," Journal of Coatings Technology, vol. 64 (No. 805), p. 39-44, (Feb. 6, 1992).
Soules et al., "Optical Properties of Powder Coatings," Journal of the Illuminating Engineering Society, p. 92-100, (May 6, 1988).
Banerjee et al., "Adhesion of Charged Powders on Metal Surface in Powder Coating Process," IEEE, p. 1897-1901, (May 6, 1993).
Meyer III, "The Electrostatics of Powder Coatings--Still a Mystery?," Proceedings of the ACE Division of Polymeric Materials:Science and Engineering, American Chemical Society, p. 220-21, (May 6, 1992).
Chen, "Modeling of Powder Paint Partical Trajectory in Electrostatic Painting," University of Arkansas at Little Rock (thesis) (USA), p. 1-17, (May 6, 1997).
Hughes, et al., "Electrostatic Powder Coating," Research Studies Press Ltd. (England), p. 61-89, (May 6, 1984).
Masuda, "Theoretical Characteristics of Standing-Wave Electric Curtains," Electrical Engineering in Japan, vol. 93, No. 1, pp. 41-53 (1973).

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