Spray apparatus for electrostatic powder coating

Details Spray apparatus for electrostatic powder coating Spray apparatus for electrostatic powder coating

1986-08-15

1988-05-31

Dorner, Kenneth J.

Fluid sprinkling, spraying, and diffusing

Electrostatic type

With fluid entrainment

239704, 239391, B05B 500

Patent

active

047475463

ABSTRACT:
A versatile spraying gun includes main tool and several attachment tools any one of which can be inserted in the main tool. Each attachment tool is designed to atomize powder particles that are to be sprayed on an article in accordance with a specific spraying method and atomization principle and method. The main common tool is comprised primarily of a body that defines a powder delivery channel and a coupling piece and discharge electrode located upstream in the delivery channel. The attachment tools have a flow guide member disposed axially within the delivery channel and an attachment piece for attaching the attachment tool to the coupling piece of the main tool. In some attachment tools, the flow guide member also houses a high voltage circuit and appropriate electrodes needed for electrostatic charging of the powder which passes through an electrical field set up between the electrodes.

REFERENCES:
patent: 3195819 (1965-07-01), Watanabe
patent: 3263127 (1966-07-01), Point et al.
patent: 3698635 (1972-10-01), Sickles
patent: 4266721 (1981-05-01), Sickles
patent: 4417696 (1983-11-01), Kako et al.
patent: 4548363 (1985-10-01), McDonough
"Journal of Electrostatics", 16 (1985), p. 283.
"Das Elektrostatische Pulverbeschichten in Entwicklung und Anwendung", 1983/84, pp. 39-43, Fachbroschure Oberflachentechnik.
"Elektrostatisches Beschichten", 25 Jun. 1975, pp. 27-37.

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