EP0092043A2 - Appareil de pulvérisation électrostatique - Google Patents

Appareil de pulvérisation électrostatique Download PDF

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Publication number
EP0092043A2
EP0092043A2 EP83101831A EP83101831A EP0092043A2 EP 0092043 A2 EP0092043 A2 EP 0092043A2 EP 83101831 A EP83101831 A EP 83101831A EP 83101831 A EP83101831 A EP 83101831A EP 0092043 A2 EP0092043 A2 EP 0092043A2
Authority
EP
European Patent Office
Prior art keywords
compressed air
annular gap
gap
annular
ring
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.)
Withdrawn
Application number
EP83101831A
Other languages
German (de)
English (en)
Other versions
EP0092043A3 (fr
Inventor
Willi Huber
Markus Schmidhauser
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.)
Wagner International AG
Original Assignee
Wagner International AG
J Wagner 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 Wagner International AG, J Wagner AG filed Critical Wagner International AG
Publication of EP0092043A2 publication Critical patent/EP0092043A2/fr
Publication of EP0092043A3 publication Critical patent/EP0092043A3/fr
Withdrawn legal-status Critical Current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
    • B05B5/04—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
    • B05B5/0407—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 with a spraying edge, e.g. like a cup or a bell
    • 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
    • B05B5/0426—Means for supplying shaping gas

Definitions

  • the invention relates to an electrostatic spraying device for applying a liquid coating material to a workpiece, with a rotating, bell-like or disk-like atomizing head, on the inner surface of which the coating material is applied and thrown off the edge of its edge, and .. with a coaxial to the atomizing head to a compressed air source connected annular gap, which ejects a compressed air jacket enveloping the atomized coating material.
  • Air currents of such a pressure level lead to undesirable turbulence and impart such high kinetic energy to the color particles that the effect of the electrostatic field (color change on the workpiece) is at least partially eliminated. Furthermore, it has been shown that with this air jacket given off by an annular gap it is hardly possible to take into account both the requirements for the adjustability of the color cloud size and the requirements for avoiding the breaking out of color particles and the lowest possible flying speed of the color particles in the direction of the workpiece.
  • the object of the present invention is therefore to improve a device of the type mentioned at the outset in order to be able to adjust the size and diameter of the cloud consisting of the atomized coating material as desired, but nevertheless the occurrence of turbulence, the eruption of some of the color particles from the cloud and a too high flight speed of the cloud towards the workpiece can be avoided
  • an additional outer ring; gap provided.
  • the inner air gap should serve in particular to encase the color cloud in order to
  • the outer air jacket supplied by the additional annular gap has the primary task of compensating for the turbulence at the edges caused by the color clouds in cooperation with the inner air jacket and returning the color particles that break out into the cloud. Practical tests have shown that it is possible to use comparatively low air pressures even with very fast rotating atomizers. Due to the possibility of width adjustment and, if necessary, the directional adjustment of the concentric two air gaps, it is possible to make a very exact adjustment of the cloud size, and that in a very wide range, the from a very narrow, almost jet-like cloud to a cloud of considerable diameter.
  • the adjustability of the two air streams opens up the possibility of either directing them directly onto the color cloud or bouncing them off on a component, such as the outer surface of the atomizer head, which further increases the extent of the adjustments and adjustments.
  • the drawing shows in section the front part of a spray gun, with one half, ie the part below the ; central pistol longitudinal axis A, is omitted.
  • 10 denotes a drive rotary shaft, on the front end of which a rotary atomizer bell 11 with atomizer edge 11a is seated.
  • the liquid to be sprayed hereinafter called paint for short, is supplied to the inner surface of the bell 11 via the paint channels 12 distributed concentrically to the axis A.
  • a bell inner body is designated.
  • the bell 11 is coaxially surrounded by a small distance from an annular body 14, on the front part of which a ring 15 is screwed. Between the front edges of the ring body 14 and ring 15 there is an annular gap 16.
  • the edge surface 14a of the body 14 delimiting the annular gap is pivoted in a diverging manner with respect to the axis A
  • the inner edge surface of the ring 15a delimiting the gap 16 is pivoted in a converging manner with respect to the axis A.
  • An inner projection 15b of the ring 15 serves as a guide element when the ring 15 is screwed relative to the ring body 14.
  • the gap behind the ring gap mouth 16 is connected to a compressed air supply which is not shown in the drawing.
  • Ring body 17 and ring 18 form an annular gap 19, wherein — corresponding to the annular gap 16 — the inner surface of the body 17 delimiting the gap 19 diverging to the axis A, the inner surface of the ring 18 delimiting the gap 19 is converging-beveled and the Ring 18 also has an inwardly jumping guide lug 18b.
  • the gap space behind the gap mouth 19 is also connected to a compressed air line, not shown.
  • the two ring bodies 14 and 17 can be a single, contiguous component.
  • the plane of the annular gap 19 is set back in relation to the plane of the ring gap 16, while the plane of the ring gap 16 is set back in relation to the plane of the atomizing edge 11a of the atomizing bell 11.
  • the atomizer bell 11 is connected to high voltage, so that its edge 11a represents a known electrostatic atomizer edge.
  • the device works as follows.
  • the bell 11 is set in rotation by the shaft 10, with the result that the paint supplied via the channels 12 is a thin film along the inner wall of the bell 11 (arrow a) toward the edge 11a. reaches from which it is thrown off by the action of centrifugal force and atomized and promoted by the action of the electrostatic field to the workpiece not shown.
  • both annular gaps 16 and 19 are supplied with pressure air which leaves the column in the direction of arrows g and c.
  • the inner air flow b hits the outer edge of the bell 11
  • the air flow c of the outer gap 19 hits the outer surface of the ring 15.
  • Both air flows are deflected from their respective impact surfaces, so that two coaxial to one another , conical air jacket envelopes opening in the direction of the workpiece.
  • the annular gap 16 becomes narrower until it finally reaches when the half displacement x is completely or almost completely closed.
  • the direction b of the air flow also changes in such a way that the flow direction b approaches the parallelism to the axis A more and more. If the ring 15 is then screwed further back, the annular gap 16 opens again and finally reaches its full width at the end of the displacement path x.
  • the direction of the air flow B also changes, in such a way that the air flow - viewed in the direction of the workpiece - diverges more and more.
  • both the annular gap widths and thus the strength of the air envelope and the air ejection directions can be set as desired, specifically for both annular gaps, makes it possible to dimension the atomizer cloud exactly in the desired manner and also to ensure that essentially none Color particles leave the cloud. This can be achieved due to the double air screen with compressed air at comparatively low pressure, so that the compressed air does not transmit too much kinetic energy to the paint particles, which disrupts the effect of the electrostatic field.
  • the two comparatively weak air envelopes lead to only insignificant turbulence in the area outside the atomizing cloud; Should there be turbulence due to negative pressure in the bell center, this effect can be caused by an additional central compressed air line 20 turned off.
  • the invention can undergo numerous modifications. For example, in some cases it is not necessary for the two air gaps 16, 19 to be adjustable separately; in this case the rings .15 and 18 are then connected to one another in terms of movement. In some cases it may also be sufficient if only the gap widths are adjustable, whereas the directions of the air flows can remain constant; in such cases, there is no need for the mutually opposing inner bevels of the surfaces delimiting the gaps.
  • rings 15 and 18 shown as screw bodies are simple sliding sleeves, provided, however, that care is taken to ensure that the rings are not inadvertently during operation. move by itself.
  • the fling edge 11a, annular gap 16 and annular gap 16 lie in three different planes; or that the levels of the annular gaps are located behind the level of the flinging edge 11a.
EP83101831A 1982-04-19 1983-02-24 Appareil de pulvérisation électrostatique Withdrawn EP0092043A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3214314 1982-04-19
DE19823214314 DE3214314A1 (de) 1982-04-19 1982-04-19 Elektrostatische spruehvorrichtung

Publications (2)

Publication Number Publication Date
EP0092043A2 true EP0092043A2 (fr) 1983-10-26
EP0092043A3 EP0092043A3 (fr) 1985-01-23

Family

ID=6161222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101831A Withdrawn EP0092043A3 (fr) 1982-04-19 1983-02-24 Appareil de pulvérisation électrostatique

Country Status (4)

Country Link
US (1) US4572437A (fr)
EP (1) EP0092043A3 (fr)
JP (1) JPS58193752A (fr)
DE (1) DE3214314A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616684A1 (de) * 1986-05-16 1987-11-19 Behr Industrieanlagen Zerstaeuber zum elektrostatischen beschichten von gegenstaenden
DE3720200A1 (de) * 1987-06-16 1988-12-29 Ransburg Gmbh Spruehbeschichtungseinrichtung mit einem rotationsspruehorgan
AU589018B2 (en) * 1986-06-26 1989-09-28 Abb K.K. Air bearing rotary atomizer
GB2224671A (en) * 1988-09-23 1990-05-16 Graco Inc "rotary atomizer"
GB2250698A (en) * 1988-09-23 1992-06-17 Graco Inc Rotary atomizer
US6991178B2 (en) 2003-01-24 2006-01-31 Dürr Systems, Inc. Concentric paint atomizer shaping air rings
EP2143500A2 (fr) 2002-01-24 2010-01-13 Dürr Systems GmbH Procédé et pulvérisateur pour le revêtement de pièces en séries
EP3566779A1 (fr) 2006-04-28 2019-11-13 Dürr Systems AG Atomiseur et procédé de fonctionnement correspondant
CN107666966B (zh) * 2015-05-22 2020-03-03 萨塔有限两合公司 用于喷枪的喷嘴装置
US10702879B2 (en) 2014-07-31 2020-07-07 Sata Gmbh & Co. Kg Spray gun manufacturing method, spray gun, spray gun body and cover
US10835911B2 (en) 2016-08-19 2020-11-17 Sata Gmbh & Co. Kg Trigger for a spray gun and spray gun having same
US11801521B2 (en) 2018-08-01 2023-10-31 Sata Gmbh & Co. Kg Main body for a spray gun, spray guns, spray gun set, method for producing a main body for a spray gun and method for converting a spray gun
US11826771B2 (en) 2018-08-01 2023-11-28 Sata Gmbh & Co. Kg Set of nozzles for a spray gun, spray gun system, method for embodying a nozzle module, method for selecting a nozzle module from a set of nozzles for a paint job, selection system and computer program product
US11865558B2 (en) 2018-08-01 2024-01-09 Sata Gmbh & Co. Kg Nozzle for a spray gun, nozzle set for a spray gun, spray guns and methods for producing a nozzle for a spray gun

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CA1266561A (fr) * 1985-08-26 1990-03-13 Kabushiki Kaisha Toyota Chuo Kenkyusho Dispositif tournant d'enduction par atomisation
DE3600920A1 (de) * 1986-01-15 1987-07-16 Mann Siegfried Spruehkopf
JPS62164958U (fr) * 1986-04-08 1987-10-20
US4887770A (en) * 1986-04-18 1989-12-19 Nordson Corporation Electrostatic rotary atomizing liquid spray coating apparatus
US4997130A (en) * 1986-06-26 1991-03-05 Illinois Tool Works, Inc. Air bearing rotary atomizer
US4936510A (en) * 1986-06-26 1990-06-26 The Devilbiss Company Rotary automizer with air cap and retainer
JPS6372367A (ja) * 1986-09-16 1988-04-02 Toyota Central Res & Dev Lab Inc 回転霧化式塗装装置
JPS63200863A (ja) * 1987-02-18 1988-08-19 Asahi Okuma Ind Co Ltd 回転電極式静電塗装ガンの霧化塗料流放出角度調節方法
DE3720201C1 (de) * 1987-06-16 1988-09-08 Ransburg Gmbh Spruehbeschichtungseinrichtung mit einer ringfoermigen Elektrodenanordnung fuer elektrisch leitfaehige Beschichtungsfluessigkeiten
GB8827044D0 (en) * 1988-11-18 1988-12-21 Horstine Farmery Ltd Improvements in/relating to spray apparatus
DE3921213C1 (fr) * 1989-06-28 1990-11-15 Wagner International Ag, Altstaetten, Ch
JP2771280B2 (ja) * 1989-10-12 1998-07-02 株式会社扇商會 静電塗装装置及び該静電塗装装置用回転部材
DK0442019T3 (da) * 1990-02-16 1995-03-13 Wagner Gmbh J Fremgangsmåde til drift af en elektrostatisk trykluftfarvesprøjtepistol
US5100057A (en) * 1990-03-30 1992-03-31 Nordson Corporation Rotary atomizer with onboard color changer and fluid pressure regulator
US5078321A (en) * 1990-06-22 1992-01-07 Nordson Corporation Rotary atomizer cup
DE4020289C1 (fr) * 1990-06-26 1991-12-12 Wagner International Ag, Altstaetten, Ch
DE4027078A1 (de) * 1990-08-27 1992-03-05 Wagner Int Elektrostatische spruehpistole
FR2692501B1 (fr) * 1992-06-22 1995-08-04 Sames Sa Dispositif de projection electrostatique de produit de revetement liquide a tete de pulverisation rotative.
US6056215A (en) * 1995-03-15 2000-05-02 Nordson Corporation Electrostatic rotary atomizing spray device
EP0780159B1 (fr) * 1995-12-19 1999-08-04 Toyota Jidosha Kabushiki Kaisha Appareil rotatif de pulvérisation électrostatique
DE19614193A1 (de) * 1996-04-10 1997-10-16 Abb Patent Gmbh Dispergiersystem für eine Pulversprüheinrichtung
JP3307266B2 (ja) * 1996-04-15 2002-07-24 トヨタ自動車株式会社 噴霧パターン可変回転霧化塗装装置
US5862988A (en) * 1996-05-15 1999-01-26 Van Der Steur; Gunnar Coating apparatus and shroud thereof
JPH1015440A (ja) * 1996-07-08 1998-01-20 Ransburg Ind Kk 静電塗装機
US6050499A (en) * 1996-12-03 2000-04-18 Abb K. K. Rotary spray head coater
US5954275A (en) * 1997-04-02 1999-09-21 Toyota Jidosha Kabushiki Kaisha Rotary atomizing electrostatic coating apparatus
US5803372A (en) * 1997-04-03 1998-09-08 Asahi Sunac Corporation Hand held rotary atomizer spray gun
JP3529598B2 (ja) * 1997-08-25 2004-05-24 本田技研工業株式会社 回転霧化式塗装装置
US6006999A (en) * 1998-02-27 1999-12-28 Chrysler Corporation Air knife blow-off for maintaining cleanliness of rotary powder applications
US6513729B2 (en) * 2000-08-29 2003-02-04 Honda Giken Kogyo Kabushiki Kaisha Two-package-mixing discharging device and two-package-mixing coating device
DE10053296C2 (de) * 2000-10-27 2003-12-18 Eisenmann Lacktechnik Kg Hochrotationszerstäuber zur Aufbringung von Pulverlack
DE10115467A1 (de) * 2001-03-29 2002-10-02 Duerr Systems Gmbh Werkzeugwechselsystem für eine Maschine
DE10115463A1 (de) * 2001-03-29 2002-10-02 Duerr Systems Gmbh Zerstäuber für eine Beschichtungsanlage und Verfahren zu seiner Materialversorgung
DE10115470A1 (de) * 2001-03-29 2002-10-10 Duerr Systems Gmbh Beschichtungsanlage mit einer Zerstäuberwechselstation
DE10115472A1 (de) * 2001-03-29 2002-10-10 Duerr Systems Gmbh Ventileinheit für eine elektrostatische Beschichtungsanlage
DE10139088A1 (de) * 2001-08-16 2003-02-27 Duerr Systems Gmbh Manipulatormaschine mit einer zu dem Arbeitsgerät geführten Leitungsanordnung
DE10202711A1 (de) * 2002-01-24 2003-07-31 Duerr Systems Gmbh Zerstäuber für die elektrostatische Serienbeschichtung von Werkstücken
DE10301942A1 (de) * 2003-01-20 2004-07-29 Dürr Systems GmbH Hydraulisch dynamischer Monomolch
DE10231421A1 (de) 2002-07-11 2004-01-22 Dürr Systems GmbH Verfahren und System zur Versorgung eines Pulverbeschichtungsgerätes
DE10233197A1 (de) * 2002-07-22 2004-02-05 Dürr Systems GmbH Potentialausgleichsanordnung für einen elektrostatischen Rotationszerstäuber
DE10233198A1 (de) * 2002-07-22 2004-02-05 Dürr Systems GmbH Rotationszerstäuber
DE10233199A1 (de) * 2002-07-22 2004-02-05 Dürr Systems GmbH Turbinenmotor eines Rotationszerstäubers
DE10239516A1 (de) * 2002-08-28 2004-03-18 Dürr Systems GmbH Schlauch für die elektrostatische Beschichtung von Werkstücken
DE10239517A1 (de) * 2002-08-28 2004-03-11 Dürr Systems GmbH Beschichtungseinrichtung mit einem Rotationszerstäuber und Verfahren zum Steuern ihres Betriebes
DE10240072B4 (de) * 2002-08-30 2005-11-24 Dürr Systems GmbH Molch zur Förderung eines Beschichtungsmaterials und Verfahren zu seiner Herstellung
DE10240451A1 (de) * 2002-09-02 2004-03-11 Dürr Systems GmbH Sensoranordnung für eine Beschichtungsanlage
DE10245594A1 (de) * 2002-09-30 2004-04-08 Dürr Systems GmbH Verfahren zur Kollisionserkennung
US20050002742A1 (en) * 2002-12-11 2005-01-06 Martin Bachmann Method and device for transporting powdery substances
DE10321614A1 (de) * 2003-05-14 2004-12-30 P + S Pulverbeschichtungs- Und Staubfilteranlagen Gmbh Beschichtungsverfahren sowie Pulverdüse und Beschichtungskabine
US6899279B2 (en) * 2003-08-25 2005-05-31 Illinois Tool Works Inc. Atomizer with low pressure area passages
US8671495B2 (en) * 2006-11-06 2014-03-18 Durr Systems, Inc. Scraper pig
US20090020626A1 (en) 2007-07-16 2009-01-22 Illinois Tool Works Inc. Shaping air and bell cup combination
CN102632000B (zh) * 2007-09-20 2015-04-01 本田技研工业株式会社 涂敷装置
AU2009246735B2 (en) * 2008-05-13 2014-02-20 Graco Minnesota Inc. Build-up minimizing spray gun tip
US20090314855A1 (en) * 2008-06-18 2009-12-24 Illinois Tool Works Inc. Vector or swirl shaping air
KR101254522B1 (ko) * 2009-05-11 2013-04-19 에이비비 가부시키가이샤 정전 도장 장치
JP5504100B2 (ja) * 2010-08-25 2014-05-28 ランズバーグ・インダストリー株式会社 静電塗装機用の回転霧化頭
JP2021006336A (ja) * 2019-06-28 2021-01-21 トヨタ自動車東日本株式会社 回転霧化塗装装置

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US3848807A (en) * 1973-12-10 1974-11-19 P Partida Confining nozzle for spray gun

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US2530206A (en) * 1942-10-31 1950-11-14 Colorator Ab Spray gun
DE922459C (de) * 1951-10-14 1955-01-17 Heinrich Boedicker Dipl Ing Niederdruck-Farbspritzpistole
FR1421419A (fr) * 1964-10-22 1965-12-17 Cie Francaise D Entpr S Ancien Perfectionnements aux têtes de pulvérisation et projection
US3848807A (en) * 1973-12-10 1974-11-19 P Partida Confining nozzle for spray gun

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616684A1 (de) * 1986-05-16 1987-11-19 Behr Industrieanlagen Zerstaeuber zum elektrostatischen beschichten von gegenstaenden
AU589018B2 (en) * 1986-06-26 1989-09-28 Abb K.K. Air bearing rotary atomizer
DE3720200A1 (de) * 1987-06-16 1988-12-29 Ransburg Gmbh Spruehbeschichtungseinrichtung mit einem rotationsspruehorgan
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
EP2143500A2 (fr) 2002-01-24 2010-01-13 Dürr Systems GmbH Procédé et pulvérisateur pour le revêtement de pièces en séries
US6991178B2 (en) 2003-01-24 2006-01-31 Dürr Systems, Inc. Concentric paint atomizer shaping air rings
EP3566779A1 (fr) 2006-04-28 2019-11-13 Dürr Systems AG Atomiseur et procédé de fonctionnement correspondant
US10702879B2 (en) 2014-07-31 2020-07-07 Sata Gmbh & Co. Kg Spray gun manufacturing method, spray gun, spray gun body and cover
CN107666966B (zh) * 2015-05-22 2020-03-03 萨塔有限两合公司 用于喷枪的喷嘴装置
US11141747B2 (en) 2015-05-22 2021-10-12 Sata Gmbh & Co. Kg Nozzle arrangement for a spray gun
US10835911B2 (en) 2016-08-19 2020-11-17 Sata Gmbh & Co. Kg Trigger for a spray gun and spray gun having same
US11801521B2 (en) 2018-08-01 2023-10-31 Sata Gmbh & Co. Kg Main body for a spray gun, spray guns, spray gun set, method for producing a main body for a spray gun and method for converting a spray gun
US11826771B2 (en) 2018-08-01 2023-11-28 Sata Gmbh & Co. Kg Set of nozzles for a spray gun, spray gun system, method for embodying a nozzle module, method for selecting a nozzle module from a set of nozzles for a paint job, selection system and computer program product
US11865558B2 (en) 2018-08-01 2024-01-09 Sata Gmbh & Co. Kg Nozzle for a spray gun, nozzle set for a spray gun, spray guns and methods for producing a nozzle for a spray gun

Also Published As

Publication number Publication date
EP0092043A3 (fr) 1985-01-23
US4572437A (en) 1986-02-25
JPS58193752A (ja) 1983-11-11
DE3214314A1 (de) 1983-10-20

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