Invention Patent
- Patent Title: ELECTROSTATIC PAINT DEPOSITION METHOD AND APPARATUS
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Application No.: CA2046109Application Date: 1991-07-03
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Publication No.: CA2046109CPublication Date: 1994-06-28
- Inventor: CHANG DAVID B , DRUMMOND JAMES E
- Applicant: HUGHES AIRCRAFT CO
- Assignee: HUGHES AIRCRAFT CO
- Current Assignee: HUGHES AIRCRAFT CO
- Priority: US56111890 1990-08-01
- Main IPC: B05B5/053
- IPC: B05B5/053 ; B05D1/04 ; B05B5/04 ; B05B5/025
Abstract:
An enhanced electrostatic paint deposition apparatus (10) comprising a nozzle (16), a conduit (14) coupled to the nozzle for supplying paint (12) thereto, and a plurality of electrically conductive whiskers (18) positioned within the nozzle for applying an electrostatic charge to droplets of the paint. Each of the whiskers terminates in a jagged end (30) for enabling the droplets to acquire an enhanced electric charge. The whiskers may be provided with lengths which are tailored to provide an array of whiskers with a desired three-dimensional curvature for controlling the focussing field on the paint droplets. Each whisker is secured to a holder (22) which is, in turn, secured to a porous grid (28) whose mesh size is selected to divide the paint into narrow streams of desired size, which exit nozzle 16 in droplet form. The holder is configured by decreasing its center portion (28) in dimension to tune the holder's current limiting capabilities. Pulsed negative high voltage is applied to the whiskers for enabling them to negatively charge the paint. Phased deflector plates 22, 24, 26 are provided to steer the paint stream.
Public/Granted literature
- CA2046109A1 ENHANCED ELECTROSTATIC PAINT DEPOSITION METHOD AND APPARATUS Public/Granted day:1992-02-02
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