Electrogasdynamic coating apparatus

Details Electrogasdynamic coating apparatus Electrogasdynamic coating apparatus

1979-03-08

1981-03-24

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Electric charging of objects or materials

Particulate matter

239706, B05B 500

Patent

active

042584094

ABSTRACT:
An apparatus and method for applying powdered coating materials includes a central channel for directing the powdered coating material passed a conduit that mixes an air jet with the powdered material. The powder is then ionized and forced outwardly towards the workpiece. A conductive cathode attractor ring for creating a corona space charge which ionizes the particles is provided and includes a radially inner porous portion. Contamination of the attractor ring due to adherence thereon of powder particles is inhibited by diverting a secondary pressurized air flow through said porous portion thereby dislodging powder particles adhering to the ring. The porous inner portion is formed of a sintered mass of individual particles which provides an increased surface area for the attractor ring that, in turn, increases the corona space charge. A slidable deflector member is provided at the end of the central channel to alter the spray pattern of the apparatus.

REFERENCES:
patent: 3667674 (1972-06-01), Parsons et al.
patent: 4020393 (1977-04-01), Porter
patent: 4039145 (1977-08-01), Felici et al.

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