EP0245849A2 - Pulvérisateur pour le revêtement électrostatique d'objets - Google Patents

Pulvérisateur pour le revêtement électrostatique d'objets Download PDF

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Publication number
EP0245849A2
EP0245849A2 EP87106943A EP87106943A EP0245849A2 EP 0245849 A2 EP0245849 A2 EP 0245849A2 EP 87106943 A EP87106943 A EP 87106943A EP 87106943 A EP87106943 A EP 87106943A EP 0245849 A2 EP0245849 A2 EP 0245849A2
Authority
EP
European Patent Office
Prior art keywords
cover
spray head
atomizer according
coated
atomizer
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
EP87106943A
Other languages
German (de)
English (en)
Other versions
EP0245849B1 (fr
EP0245849A3 (en
Inventor
Rolf Schneider
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.)
Mahle Behr Industry GmbH and Co KG
Original Assignee
Behr Industrieanlagen GmbH and Co KG
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 Behr Industrieanlagen GmbH and Co KG filed Critical Behr Industrieanlagen GmbH and Co KG
Publication of EP0245849A2 publication Critical patent/EP0245849A2/fr
Publication of EP0245849A3 publication Critical patent/EP0245849A3/de
Application granted granted Critical
Publication of EP0245849B1 publication Critical patent/EP0245849B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • B05B5/001—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means incorporating means for heating or cooling, e.g. the material to be sprayed

Definitions

  • the invention relates to an atomizer according to the preamble of claim 1.
  • Known rotary atomizers e.g. serve for electrostatic coating of vehicle bodies, are contaminated in operation by the sprayed coating material.
  • the bell-plate jacket, the area of the drive shaft between the spray bell and the front housing part containing the shaft bearing, and the outer surfaces of this housing part itself are particularly at risk.
  • the undesired precipitation is not only lost for the object to be coated, but can in part be released during operation and only later hike to the object, which then eg becomes significantly dirty when changing colors.
  • the known atomizers therefore have to be cleaned frequently and regularly in a relatively laborious and time-consuming manner, which means long periods of non-operation and a corresponding impairment, especially of the large-scale coating.
  • the invention has for its object to provide an atomizer, the outer areas containing the drive and / or the storage of the spray head tend less to fogging by coating material than before and, if necessary, can be cleaned more easily.
  • the rotating cover which can expediently be an extension of the bell plate or the like via the front housing end, could in itself be cleaned much more easily than fixed housing surfaces, for example by spraying a solvent onto the cover. Surprisingly, however, it has been shown that there is almost no inherent contamination of the rotating parts (cover and spray head). This may be due to the air currents generated due to the rotation.
  • a rotary atomizer is known per se, the rotating spray head of which has an axially projecting cylindrical projection at its end facing away from the object to be coated, which closely encloses and also rotates around a cylindrical projection of the housing part containing the bearing (EP-A 0120648).
  • the purpose of this construction is to seal an ink chamber formed between the housing and the spray head to the outside.
  • the sprayed-off paint particles are charged by a bell electrode located inside the spray head and an additional electrode arranged outside with a small radial distance, which is surrounded by another outer electrode which serves to repel the paint particles.
  • the cylindrical housing attachment surrounded by the spray head attachment does not lie in an area in which there is a particular risk of contamination from the sprayed coating material.
  • This exemplary embodiment is an atomizer device which is particularly suitable for coating vehicle bodies with so-called water-based paints and has a rotary atomizer whose spray head 2, which is provided with a bell cup 3, can be mounted on a hollow shaft construction 4 containing a paint supply line, which is known in the front part 5 the housing of the atomizer is mounted.
  • the spray head 2 is grounded during operation, so it is at the same potential as the body to be coated.
  • a plurality of outer electrodes 6 are used, which are inserted at their rear end into an annular body 7 of insulating material surrounding the atomizer housing at a distance, in which an electrical conductor 8, which connects the electrodes to one another and is connected to a high-voltage line, against them the end face of the ring body facing the body is arranged in isolation.
  • the arrangement and the mutual spacing of the electrodes are selected so that no significant deposit of coating material occurs on the end face of the ring body 7 during operation.
  • the electrodes can expediently be arranged in pins 9 of insulating material projecting axially from the end face of the ring body 7 in a finger-like manner.
  • Electrodes are provided, which are each arranged on their own radially protruding holders, as is known from DE-A 34 29 075.
  • the invention is also suitable for spray devices in which the spray head itself is set to high voltage potential.
  • a rotating cover 10 is provided for the front part 5 of the atomizer housing, the outer surfaces of which, including the end face, lie in an area of risk of contamination by the coating material sprayed from the bell cup 3.
  • the generally cup-shaped cover 10 as shown can be made of metal, sits coaxially on the shaft construction 4 with a central opening of its bottom part 11 and is connected to it by e.g. two axial drive pins 12 connected in a rotationally secured manner.
  • the pins 12 of the cover 10 can easily be inserted into axial bores in a corresponding end face of the shaft construction 4 without tools.
  • the as a separate component e.g.
  • the cover 10 is then fastened in a nut-like manner by means of a thread on the bell plate 3 screwed onto the shaft construction 4.
  • the cover could also be integrally formed on the bell plate. Due to the described construction of the cover 10 and the bell plate 3 as two separate components, these may be Much easier to assemble on the drive shaft than a one-piece component (because you can hold the shaft with the cover when screwing on the bell cup).
  • the generally sleeve-shaped part 14 of the cover 10 concentrically encloses the cylindri with a certain play cal outer surface of the housing part 5 and extends to a radially projecting housing part 20, the end face facing the spray head contains an annular slot 21 into which the annular rear edge of the sleeve-shaped cover part 14 engages all around.
  • This arrangement which forms a type of labyrinth seal, prevents the penetration of coating material into the space between the cover 10 and the housing part 5, especially if compressed air is conducted into the slot 21.
  • the bell plate 3 of the spray head 2 has, as shown, a sleeve-shaped outer wall 15, the outer surface of which is to be flush with the outer surface of the cover 10. Even better than with a cylindrical cover with a radially constant outer diameter, the deposition of coating material on the cover is avoided if its outer diameter is steadily smaller towards the rear, which is probably due to the corresponding changing peripheral speeds. The conical widening of the outer diameter continues forward on the outer wall 15 of the bell cup 3 up to the vicinity of the spraying edge 16.
  • outlet openings 22 of the housing part 20 open. Air can escape through these openings, which on the one hand can serve as guiding air for supporting and shaping the spray jets in the direction of the object to be coated. On the other hand, the air emerging at this point can also contribute to the support and stabilization of the pollution-preventing air flows on and around the rotating cover 10, or may even be required.
  • At least one outlet opening for a liquid or gaseous cleaning agent for the cover opens at the rear end of the cover 10.
  • This can be the aforementioned air outlet openings 22 or separate openings 23.
  • a separate cleaning device (not shown) which can be moved along its outer surface can be arranged for cleaning the cover 10.
  • the cover 10 could also be rotatably supported and driven separately from the spray bell.
  • One possibility for driving the cover enclosing the housing part 5 would be, for example, air nozzles arranged at its rear end.
  • the housing part enclosed by the rotating cover 10 is the part containing the bearings of the spray head 2.
  • the axial length of the cover i.e. the length of the covered part of the housing is at least as large as half (maximum) outer diameter of the spray head 2.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
EP87106943A 1986-05-16 1987-05-13 Pulvérisateur pour le revêtement électrostatique d'objets Expired - Lifetime EP0245849B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616684 1986-05-16
DE19863616684 DE3616684A1 (de) 1986-05-16 1986-05-16 Zerstaeuber zum elektrostatischen beschichten von gegenstaenden

Publications (3)

Publication Number Publication Date
EP0245849A2 true EP0245849A2 (fr) 1987-11-19
EP0245849A3 EP0245849A3 (en) 1988-10-26
EP0245849B1 EP0245849B1 (fr) 1991-03-06

Family

ID=6301054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106943A Expired - Lifetime EP0245849B1 (fr) 1986-05-16 1987-05-13 Pulvérisateur pour le revêtement électrostatique d'objets

Country Status (4)

Country Link
US (1) US4760965A (fr)
EP (1) EP0245849B1 (fr)
DE (2) DE3616684A1 (fr)
ES (1) ES2020665B3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224671A (en) * 1988-09-23 1990-05-16 Graco Inc "rotary atomizer"
GB2250698A (en) * 1988-09-23 1992-06-17 Graco Inc Rotary atomizer
DE4342336A1 (de) * 1993-12-11 1995-06-14 Abb Patent Gmbh Rotationszerstäuber
DE19611369A1 (de) * 1996-03-22 1997-09-25 Duerr Gmbh & Co Rotationszerstäuber zum elektrostatisch unterstützten Beschichten von Gegenständen mit Farben bzw. Lacken
DE102005015604A1 (de) * 2005-04-05 2006-10-19 Dürr Systems GmbH Rotationszerstäuberbauteil, insbesondere Lenkluftring oder Glockenteller
DE102006057596A1 (de) * 2006-12-06 2008-06-19 Dürr Systems GmbH Lenkluftring mit einer Ringmulde und entsprechender Glockenteller
DE102008027997A1 (de) * 2008-06-12 2009-12-24 Dürr Systems GmbH Universalzerstäuber

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3609240C2 (de) * 1986-03-19 1996-08-01 Behr Industrieanlagen Vorrichtung zum elektrostatischen Beschichten von Gegenständen
EP0283918B1 (fr) * 1987-03-23 1991-07-10 Behr Industrieanlagen GmbH & Co. Dispositif de revêtement électrostatique d'objets
DE8708312U1 (de) * 1987-06-12 1987-07-30 Behr Industrieanlagen GmbH & Co, 74379 Ingersheim Einrichtung zum Vernebeln flüssiger Farbe
DE4105116C2 (de) * 1991-02-19 2003-03-27 Behr Industrieanlagen Vorrichtung und Verfahren zum elektrostatischen Beschichten von Gegenständen
JP2830683B2 (ja) * 1992-09-11 1998-12-02 トヨタ自動車株式会社 回転霧化静電塗装装置
US5226605A (en) * 1992-09-30 1993-07-13 Barr & Murphy (Canada) Ltee/Ltd. Rotary atomizer disk with replaceable nozzle inserts and method for replacing inserts
DE19637308A1 (de) * 1996-09-13 1998-03-19 Abb Patent Gmbh Rotationssprühzerstäuber
US5865379A (en) * 1997-05-12 1999-02-02 Agco Corporation Isolator for depending components on electrostatic field sprayer boom
US7455249B2 (en) 2006-03-28 2008-11-25 Illinois Tool Works Inc. Combined direct and indirect charging system for electrostatically-aided coating system
US20080011333A1 (en) * 2006-07-13 2008-01-17 Rodgers Michael C Cleaning coating dispensers
US7520450B2 (en) * 2006-10-10 2009-04-21 Illinois Tool Works Inc. Electrical connections for coating material dispensing equipment
GB0625583D0 (en) * 2006-12-21 2007-01-31 Itw Ltd Paint spray apparatus
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967669A (en) * 1958-03-05 1961-01-10 Edward O Norris Centrifugal spraying device
EP0034278A2 (fr) * 1980-02-15 1981-08-26 BASF Lacke + Farben AG Procédé et appareil pour le revêtement électrostatique d'objets à l'aide d'un fluide
DE3429075A1 (de) * 1984-08-07 1986-02-20 Hermann Behr & Sohn Gmbh & Co, 7121 Ingersheim Vorrichtung zum elektrostatischen beschichten von gegenstaenden

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2047699A (en) * 1934-02-05 1936-07-14 Harold L Periman Spraying apparatus for liquid and semiliquid material
NL270215A (fr) * 1960-11-02
FR2336183A1 (fr) * 1975-12-26 1977-07-22 Marchand Bernard Couronne de compensation d'air et de repulsion pour appareil d'application de peinture liquide par procede electrostatique du type a disque tournant a grande vitesse
FR2412351A1 (fr) * 1977-12-20 1979-07-20 Air Ind Projecteur electrostatique de peinture a bol ou a disque tournant avec un joint d'etancheite pneumatique
US4376135A (en) * 1981-03-20 1983-03-08 Binks Manufacturing Company Apparatus for atomization in electrostatic coating and method
DE3214314A1 (de) * 1982-04-19 1983-10-20 J. Wagner AG, 9450 Altstätten Elektrostatische spruehvorrichtung
US4529672A (en) * 1983-03-29 1985-07-16 Union Carbide Corporation Process of making electrochemical electrodes and electrodes made thereby
JPS60168917A (ja) * 1984-02-10 1985-09-02 Nissan Motor Co Ltd 気体軸受装置
GB8428288D0 (en) * 1984-11-08 1984-12-19 Pye B J Electrostatic sprayers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967669A (en) * 1958-03-05 1961-01-10 Edward O Norris Centrifugal spraying device
EP0034278A2 (fr) * 1980-02-15 1981-08-26 BASF Lacke + Farben AG Procédé et appareil pour le revêtement électrostatique d'objets à l'aide d'un fluide
DE3429075A1 (de) * 1984-08-07 1986-02-20 Hermann Behr & Sohn Gmbh & Co, 7121 Ingersheim Vorrichtung zum elektrostatischen beschichten von gegenstaenden

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224671A (en) * 1988-09-23 1990-05-16 Graco Inc "rotary atomizer"
GB2250698A (en) * 1988-09-23 1992-06-17 Graco Inc Rotary atomizer
GB2250698B (en) * 1988-09-23 1992-12-23 Graco Inc Rotary atomizer
GB2224671B (en) * 1988-09-23 1992-12-23 Graco Inc Rotary atomizer
DE4342336A1 (de) * 1993-12-11 1995-06-14 Abb Patent Gmbh Rotationszerstäuber
DE19611369A1 (de) * 1996-03-22 1997-09-25 Duerr Gmbh & Co Rotationszerstäuber zum elektrostatisch unterstützten Beschichten von Gegenständen mit Farben bzw. Lacken
DE102005015604A1 (de) * 2005-04-05 2006-10-19 Dürr Systems GmbH Rotationszerstäuberbauteil, insbesondere Lenkluftring oder Glockenteller
DE102005015604B4 (de) * 2005-04-05 2007-04-12 Dürr Systems GmbH Rotationszerstäuberbauteil
DE102006057596A1 (de) * 2006-12-06 2008-06-19 Dürr Systems GmbH Lenkluftring mit einer Ringmulde und entsprechender Glockenteller
US8827181B2 (en) 2006-12-06 2014-09-09 Durr Systems Gmbh Shaping air ring comprising an annular cavity and corresponding bell cup
DE102008027997A1 (de) * 2008-06-12 2009-12-24 Dürr Systems GmbH Universalzerstäuber
US8881672B2 (en) 2008-06-12 2014-11-11 Duerr Systems, Gmbh Universal atomizer

Also Published As

Publication number Publication date
DE3616684A1 (de) 1987-11-19
US4760965A (en) 1988-08-02
EP0245849B1 (fr) 1991-03-06
EP0245849A3 (en) 1988-10-26
ES2020665B3 (es) 1991-09-01
DE3768327D1 (de) 1991-04-11

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