CA2046109A1 - Electrostatic paint deposition method and apparatus - Google Patents

Electrostatic paint deposition method and apparatus

Info

Publication number
CA2046109A1
CA2046109A1 CA2046109A CA2046109A CA2046109A1 CA 2046109 A1 CA2046109 A1 CA 2046109A1 CA 2046109 A CA2046109 A CA 2046109A CA 2046109 A CA2046109 A CA 2046109A CA 2046109 A1 CA2046109 A1 CA 2046109A1
Authority
CA
Canada
Prior art keywords
paint
whiskers
nozzle
droplets
holder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2046109A
Other languages
French (fr)
Other versions
CA2046109C (en
Inventor
David B. Chang
James E. Drummond
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Co
Original Assignee
David B. Chang
James E. Drummond
Hughes Aircraft Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by David B. Chang, James E. Drummond, Hughes Aircraft Company filed Critical David B. Chang
Publication of CA2046109A1 publication Critical patent/CA2046109A1/en
Application granted granted Critical
Publication of CA2046109C publication Critical patent/CA2046109C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes
    • B05B5/0536—Dimensional characteristics of electrodes, e.g. diameter or radius of curvature of a needle-like corona electrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes

Abstract

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.
CA002046109A 1990-08-01 1991-07-03 Electrostatic paint deposition method and apparatus Expired - Fee Related CA2046109C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US561,118 1990-08-01
US07/561,118 US5086972A (en) 1990-08-01 1990-08-01 Enhanced electrostatic paint deposition method and apparatus

Publications (2)

Publication Number Publication Date
CA2046109A1 true CA2046109A1 (en) 1992-02-02
CA2046109C CA2046109C (en) 1994-06-28

Family

ID=24240704

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002046109A Expired - Fee Related CA2046109C (en) 1990-08-01 1991-07-03 Electrostatic paint deposition method and apparatus

Country Status (5)

Country Link
US (1) US5086972A (en)
EP (1) EP0469775A1 (en)
JP (1) JPH04265168A (en)
KR (1) KR940001614B1 (en)
CA (1) CA2046109C (en)

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* Cited by examiner, † Cited by third party
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US5332154A (en) * 1992-02-28 1994-07-26 Lundy And Associates Shoot-up electrostatic nozzle and method
GB9225098D0 (en) 1992-12-01 1993-01-20 Coffee Ronald A Charged droplet spray mixer
US6880554B1 (en) 1992-12-22 2005-04-19 Battelle Memorial Institute Dispensing device
US6105571A (en) 1992-12-22 2000-08-22 Electrosols, Ltd. Dispensing device
GB9406255D0 (en) * 1994-03-29 1994-05-18 Electrosols Ltd Dispensing device
GB9406171D0 (en) * 1994-03-29 1994-05-18 Electrosols Ltd Dispensing device
GB9410658D0 (en) * 1994-05-27 1994-07-13 Electrosols Ltd Dispensing device
US5520715A (en) * 1994-07-11 1996-05-28 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Directional electrostatic accretion process employing acoustic droplet formation
US5647543A (en) * 1995-01-31 1997-07-15 Graco Inc Electrostatic ionizing system
EP0734777A3 (en) * 1995-03-28 1997-08-20 Graco Inc Electrostatic ionizing system
US6252129B1 (en) 1996-07-23 2001-06-26 Electrosols, Ltd. Dispensing device and method for forming material
US7193124B2 (en) 1997-07-22 2007-03-20 Battelle Memorial Institute Method for forming material
GB2327895B (en) 1997-08-08 2001-08-08 Electrosols Ltd A dispensing device
DE19936148A1 (en) * 1999-07-31 2001-02-01 Abb Research Ltd Procedure for determining spray parameters for a paint spraying system
US20040011901A1 (en) * 2000-07-10 2004-01-22 Rehman William R. Unipolarity powder coating systems including improved tribocharging and corona guns
US6645300B2 (en) 2000-07-11 2003-11-11 Nordson Corporation Unipolarity powder coating systems including improved tribocharging and corona guns
US20030038193A1 (en) * 2000-07-11 2003-02-27 Rehman William R. Unipolarity powder coating systems including improved tribocharging and corona guns
US6843968B2 (en) * 2000-09-29 2005-01-18 Seiji Kagawa Method of manufacturing liquid medium containing composite ultrafine particles and apparatus thereof
US20030160105A1 (en) * 2002-02-22 2003-08-28 Kelly Arnold J. Methods and apparatus for dispersing a conductive fluent material
US20040159282A1 (en) * 2002-05-06 2004-08-19 Sanner Michael R Unipolarity powder coating systems including improved tribocharging and corona guns
US8245951B2 (en) * 2008-04-22 2012-08-21 Applied Nanotech Holdings, Inc. Electrostatic atomizing fuel injector using carbon nanotubes
US8985051B2 (en) * 2011-12-15 2015-03-24 Honeywell Asca Inc. Apparatus for producing a spray of changed droplets of aqueous liquid
CN107638969A (en) * 2017-11-07 2018-01-30 西安智水环境科技有限公司 One kind disappears haze system shower nozzle special-purpose electrostatic loading device
BR102017026883A2 (en) * 2017-12-13 2019-06-25 Tecnopampa Indústria De Máquinas Ltda PROLONGER ISOLATED FOR SPRAYING WITH ELECTROSTATIC ASSISTANCE
US11232244B2 (en) * 2018-12-28 2022-01-25 Dassault Systemes Americas Corp. Simulation of robotic painting for electrostatic wraparound applications
CN112275582A (en) * 2020-09-22 2021-01-29 苏州润凯机械有限公司 Spraying process of water-based high-temperature-resistant paint for fluid director

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA569700A (en) * 1959-01-27 J. Lamm Lewis Method and apparatus of charging particles in electrostatic sprays
US2894175A (en) * 1949-03-25 1959-07-07 Gen Motors Corp Apparatus for spray painting
US2890388A (en) * 1955-11-30 1959-06-09 Gen Motors Corp Electrostatic spray charger
DE1225523B (en) * 1959-12-13 1966-09-22 Escher Wyss Gmbh Electrostatic applicator spray device
US3195264A (en) * 1963-10-01 1965-07-20 Robert P Bennett Nozzle for electrostatic dusting devices
FR2158582A5 (en) * 1971-08-02 1973-06-15 Tunzini Sames
CH579951A5 (en) * 1975-04-11 1976-09-30 Gema Ag
GB2020200B (en) * 1978-03-08 1982-09-15 Air Ind Electrostatic spraying
GB2018627B (en) * 1978-04-17 1982-04-15 Ici Ltd Process and apparatus for spraying liguid
US4440349A (en) * 1979-09-17 1984-04-03 Ppg Industries, Inc. Electrostatic spray gun having increased surface area from which fluid particles can be formed
DE3005677C2 (en) * 1980-02-15 1982-06-24 Basf Farben + Fasern Ag, 2000 Hamburg Method and device for the electrostatic coating of objects with liquids
US4310474A (en) * 1980-04-02 1982-01-12 Western Electric Company, Inc. Method and apparatus for generating a vapor stream
EP0121288B1 (en) * 1983-01-06 1989-05-17 National Research Development Corporation Electrostatic spray head
US4736209A (en) * 1985-10-10 1988-04-05 Burlington, Industries, Inc. Tensionable ground electrode for fluid-jet marking apparatus
US4776515A (en) * 1986-08-08 1988-10-11 Froughieh Michalchik Electrodynamic aerosol generator

Also Published As

Publication number Publication date
EP0469775A1 (en) 1992-02-05
US5086972A (en) 1992-02-11
KR940001614B1 (en) 1994-02-28
CA2046109C (en) 1994-06-28
JPH04265168A (en) 1992-09-21
KR930001988A (en) 1993-02-22

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