EP0034278A2 - Procédé et appareil pour le revêtement électrostatique d'objets à l'aide d'un fluide - Google Patents

Procédé et appareil pour le revêtement électrostatique d'objets à l'aide d'un fluide Download PDF

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Publication number
EP0034278A2
EP0034278A2 EP81100609A EP81100609A EP0034278A2 EP 0034278 A2 EP0034278 A2 EP 0034278A2 EP 81100609 A EP81100609 A EP 81100609A EP 81100609 A EP81100609 A EP 81100609A EP 0034278 A2 EP0034278 A2 EP 0034278A2
Authority
EP
European Patent Office
Prior art keywords
fluid
bell
spray
spray bell
speed
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
EP81100609A
Other languages
German (de)
English (en)
Other versions
EP0034278B1 (fr
EP0034278A3 (en
Inventor
Roland Andreas Dipl.-Ing. Meisner
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.)
BASF Farben und Fasern AG
Original Assignee
BASF Farben und Fasern AG
BASF Lacke und Farben AG
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 BASF Farben und Fasern AG, BASF Lacke und Farben AG filed Critical BASF Farben und Fasern AG
Priority to AT81100609T priority Critical patent/ATE9203T1/de
Publication of EP0034278A2 publication Critical patent/EP0034278A2/fr
Publication of EP0034278A3 publication Critical patent/EP0034278A3/de
Application granted granted Critical
Publication of EP0034278B1 publication Critical patent/EP0034278B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1064—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft
    • 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
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
    • 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
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0415—Driving means; Parts thereof, e.g. turbine, shaft, bearings

Definitions

  • the invention relates to a method for electrostatically coating objects with a fluid, e.g. liquid paint, by applying a high voltage to a spray bell and supplying the fluid to the rotating spray bell.
  • a fluid e.g. liquid paint
  • Spray systems are also known in which the paint is electrostatically drawn off as a thin film from a knife-like edge.
  • the paint is fed to the spray edge by gravity or centrifugal force.
  • the invention has for its object to provide a method with which a fluid, for example liquid paint, can be sprayed onto an object to be processed, in contrast to the previously known devices also difficult coating materials, such as "metallic paints", can be processed and a uniform fine distribution of the color is guaranteed without fear of the presence of air pockets.
  • a fluid for example liquid paint
  • metallic paints difficult coating materials
  • Another object of the invention is to provide a simple, handy and reliable device for performing the method.
  • the underlying the invention object is achieved in that the conveying speed of the fed to the center of the spray bell fluid is decelerated when entering into the bell to nearly zero, then the speed is increased by the fact that by the bell on 15ooo to 6 0th Accelerated 000 RPM and then thrown off the spray edge of the bell and fed to the object to be coated.
  • the device for carrying out the method according to the invention is characterized in that a diffuser is provided in the feed line for the fluid in the region of the line end.
  • the inventive method is thus worked so that the one with a speed of preferably 15.ooo to 6 0th 000 RPM rotating bell centrally supplied fluid flow through the toroidal vortex forming in the free half space without detachment of the moving bell inner surface and is supplied there in a manner known per se via frictional engagement or positive engagement of the spray edge.
  • the fluid flow is almost decelerated to zero speed by means of a diffuser and a rectifier screen.
  • the position of the swirl axis is not subject to any restrictions in wide operating areas.
  • a particularly expedient device for carrying out the method according to the invention consists in a bell which is seated on a hollow axis and is driven by an external rotor drive.
  • the hollow axis itself serves as a lacquer channel, which widens like a diffuser at the transition point to the inside of the bell, before the fluid then passes through a rectifier sieve at its end.
  • the impressed forces of the torus vortex then make the fluid of the moving inner surface of the bell, which is grooved for positive transport, radial and rotationally symmetrical to hand over.
  • nozzle bores are provided on one or more partial circles, one of which is preferably larger than the diameter of the atomizing edge.
  • the pitch circle diameter and the bore geometry are selected in relation to the air throughput so that the air balance around the rotating bell is ensured and the sprayed paint mist cone receives a defined axial thrust through the circular air curtain.
  • Fig. 1 has the hollow shaft 1, 1o and 1 0 'of the bell 2 with the rotor 5, the stator 11 and the dynamic seal 2o and the fabric sleeve 16 carries the bearings.
  • the elec trical lead 8 for the stator is guided in a groove 17 on the hollow shaft through the bearing 1 0 '.
  • the hollow shaft ends in a diffuser 12, which is closed by a rectifying screen 14.
  • the inlet of the diffuser is designed as a valve seat 3, on which the fluid flow can be shut off using the valve needle 4.
  • the bell inner contour carries a radial toothing 15 for the transmission of the Coriolis force.
  • the nozzle bores 9 of the nozzle ring 6 generate an annular air curtain which imparts an axial thrust to the paint mist sprayed on the edge 13.
  • the paint to be sprayed is introduced via line 7.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Paints Or Removers (AREA)
  • Pens And Brushes (AREA)
EP81100609A 1980-02-15 1981-01-28 Procédé et appareil pour le revêtement électrostatique d'objets à l'aide d'un fluide Expired EP0034278B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81100609T ATE9203T1 (de) 1980-02-15 1981-01-28 Verfahren und vorrichtung zum elektrostatischen ueberziehen von gegenstaenden mit einem fluid.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3005677A DE3005677C2 (de) 1980-02-15 1980-02-15 Verfahren und Vorrichtung zum elektrostatischen Überziehen von Gegenständen mit Flüssigkeiten
DE3005677 1980-02-15

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP83102488A Division EP0089043A3 (fr) 1981-01-28 1981-01-28 Procédé et appareil pour le revêtement électrostatique des objets par des fluides
EP83102488.0 Division-Into 1981-01-28

Publications (3)

Publication Number Publication Date
EP0034278A2 true EP0034278A2 (fr) 1981-08-26
EP0034278A3 EP0034278A3 (en) 1981-12-16
EP0034278B1 EP0034278B1 (fr) 1984-09-05

Family

ID=6094700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100609A Expired EP0034278B1 (fr) 1980-02-15 1981-01-28 Procédé et appareil pour le revêtement électrostatique d'objets à l'aide d'un fluide

Country Status (10)

Country Link
US (1) US4402991A (fr)
EP (1) EP0034278B1 (fr)
JP (1) JPS56141870A (fr)
AT (1) ATE9203T1 (fr)
BR (1) BR8100890A (fr)
DE (2) DE3005677C2 (fr)
DK (1) DK157903C (fr)
ES (1) ES8206222A1 (fr)
MX (1) MX149160A (fr)
ZA (1) ZA81929B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182493A1 (fr) * 1984-10-26 1986-05-28 A/S Niro Atomizer Disque de pulvérisation pour appareil de séchage par atomisation
EP0245849A2 (fr) * 1986-05-16 1987-11-19 Behr Industrieanlagen GmbH & Co. Pulvérisateur pour le revêtement électrostatique d'objets

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0203830B1 (fr) * 1985-05-31 1990-01-31 Unimation Inc. Disperseur à tuyère tournante
US4659018A (en) * 1985-05-31 1987-04-21 Westinghouse Electric Corp. Orbiting nozzle dispersion apparatus
DE3634443A1 (de) * 1986-10-09 1988-04-21 Lactec Ges Fuer Moderne Lackte Vorrichtung zum elektrostatischen aufbringen von fliessfaehigen medien
US5086972A (en) * 1990-08-01 1992-02-11 Hughes Aircraft Company Enhanced electrostatic paint deposition method and apparatus
CA2128398C (fr) * 1994-07-19 2007-02-06 John Sulzer Appareil de coulee en continue de bandes metalliques, injecteur utilise pour ce faire et procede connexe
US6409104B1 (en) 2000-04-19 2002-06-25 Ford Global Technologies, Inc. Silicon-doped amorphous carbon coating for paint bell atomizers
GR1003825B (el) * 2001-03-29 2002-02-26 Φυγοκεντρικη γεννητρια του αεροζολ
US6889921B2 (en) * 2002-09-30 2005-05-10 Illinois Tool Works Inc. Bell cup skirt
US7128277B2 (en) 2003-07-29 2006-10-31 Illinois Tool Works Inc. Powder bell with secondary charging electrode
US20050023385A1 (en) * 2003-07-29 2005-02-03 Kui-Chiu Kwok Powder robot gun
US20050056212A1 (en) * 2003-09-15 2005-03-17 Schaupp John F. Split shroud for coating dispensing equipment
US20050173556A1 (en) * 2004-02-09 2005-08-11 Kui-Chiu Kwok Coating dispensing nozzle
DE102006022057B3 (de) * 2006-05-11 2007-10-31 Dürr Systems GmbH Applikationselement für einen Rotationszerstäuber und zugehöriges Betriebsverfahren
GB0625583D0 (en) * 2006-12-21 2007-01-31 Itw Ltd Paint spray apparatus
US8371517B2 (en) 2007-06-29 2013-02-12 Illinois Tool Works Inc. Powder gun deflector
US8602326B2 (en) * 2007-07-03 2013-12-10 David M. Seitz Spray device having a parabolic flow surface
US20090020626A1 (en) * 2007-07-16 2009-01-22 Illinois Tool Works Inc. Shaping air and bell cup combination
US8096264B2 (en) * 2007-11-30 2012-01-17 Illinois Tool Works Inc. Repulsion ring
US10155233B2 (en) * 2008-04-09 2018-12-18 Carlisle Fluid Technologies, Inc. Splash plate retention method and apparatus
US20090314855A1 (en) * 2008-06-18 2009-12-24 Illinois Tool Works Inc. Vector or swirl shaping air

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2850322A (en) * 1956-05-31 1958-09-02 Rheem Mfg Co Centrifugal spray head
US2893894A (en) * 1958-11-03 1959-07-07 Ransburg Electro Coating Corp Method and apparatus for electrostatically coating
DE973478C (de) * 1952-04-01 1960-03-03 Metallgesellschaft Ag Vorrichtung zur Ausbildung fein verteilter Nebel in Form einer Wolke fuer die Abscheidung im elektrostatischen Feld unter Anwendung eines Hilfsgasstromes
US2980338A (en) * 1954-03-04 1961-04-18 Fischer & Co H G Electrostatic paint spraying system
DE1148167B (de) * 1954-05-24 1963-05-02 Harper J Ransburg Co Rotationszerstaeuber zum elektrostatischen Auftragen von Farbe od. dgl. Fluessigkeiten
DE1933147A1 (de) * 1969-06-30 1971-01-21 Mueller Ernst Kg Farbspritzpistole fuer das elektrostatische Farbspritzen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1240764B (de) * 1963-03-15 1967-05-18 Mueller Ernst Fa Verfahren zum elektrostatischen UEberziehen von Gegenstaenden mit Farbe und Vorrichtung zur Durchfuehrung des Verfahrens
US4114564A (en) * 1963-06-13 1978-09-19 Ransburg Corporation Electrostatic coating apparatus
US3442688A (en) * 1964-11-13 1969-05-06 Gen Motors Corp Electrostatic spray coating method and apparatus therefor
US3418971A (en) * 1964-11-13 1968-12-31 Gen Motors Corp Apparatus for electrostatic spray coating
US3393662A (en) * 1964-12-30 1968-07-23 Ronald J. Blackwell Apparatus for electrostatic spray coating
GB1599303A (en) * 1977-09-20 1981-09-30 Nat Res Dev Electrostatic spraying
JPS5511064A (en) * 1978-07-12 1980-01-25 Toyota Motor Corp Rotary type electrostatic coater for conductive paint

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973478C (de) * 1952-04-01 1960-03-03 Metallgesellschaft Ag Vorrichtung zur Ausbildung fein verteilter Nebel in Form einer Wolke fuer die Abscheidung im elektrostatischen Feld unter Anwendung eines Hilfsgasstromes
US2980338A (en) * 1954-03-04 1961-04-18 Fischer & Co H G Electrostatic paint spraying system
DE1148167B (de) * 1954-05-24 1963-05-02 Harper J Ransburg Co Rotationszerstaeuber zum elektrostatischen Auftragen von Farbe od. dgl. Fluessigkeiten
US2850322A (en) * 1956-05-31 1958-09-02 Rheem Mfg Co Centrifugal spray head
US2893894A (en) * 1958-11-03 1959-07-07 Ransburg Electro Coating Corp Method and apparatus for electrostatically coating
DE1933147A1 (de) * 1969-06-30 1971-01-21 Mueller Ernst Kg Farbspritzpistole fuer das elektrostatische Farbspritzen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182493A1 (fr) * 1984-10-26 1986-05-28 A/S Niro Atomizer Disque de pulvérisation pour appareil de séchage par atomisation
US4733821A (en) * 1984-10-26 1988-03-29 A/S Niro Atomizer Atomizer wheel for use in a spray drying apparatus
EP0245849A2 (fr) * 1986-05-16 1987-11-19 Behr Industrieanlagen GmbH & Co. Pulvérisateur pour le revêtement électrostatique d'objets
EP0245849A3 (en) * 1986-05-16 1988-10-26 Behr Industrieanlagen Gmbh & Co. Sprayer for the electrostatic coating of objects

Also Published As

Publication number Publication date
DK157903C (da) 1990-08-27
DE3165801D1 (en) 1984-10-11
ES499449A0 (es) 1982-08-16
DE3005677A1 (de) 1981-08-20
EP0034278B1 (fr) 1984-09-05
DE3005677C2 (de) 1982-06-24
EP0034278A3 (en) 1981-12-16
US4402991A (en) 1983-09-06
BR8100890A (pt) 1981-08-25
DK157903B (da) 1990-03-05
DK60381A (da) 1981-08-16
JPS56141870A (en) 1981-11-05
ES8206222A1 (es) 1982-08-16
MX149160A (es) 1983-09-07
ATE9203T1 (de) 1984-09-15
ZA81929B (en) 1982-03-31

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