EP0541745B1 - Dispositif de revetement par pulverisation - Google Patents

Dispositif de revetement par pulverisation Download PDF

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Publication number
EP0541745B1
EP0541745B1 EP92910645A EP92910645A EP0541745B1 EP 0541745 B1 EP0541745 B1 EP 0541745B1 EP 92910645 A EP92910645 A EP 92910645A EP 92910645 A EP92910645 A EP 92910645A EP 0541745 B1 EP0541745 B1 EP 0541745B1
Authority
EP
European Patent Office
Prior art keywords
coating material
switching device
path
coating
valve
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.)
Revoked
Application number
EP92910645A
Other languages
German (de)
English (en)
Other versions
EP0541745A1 (fr
Inventor
Jörg EYSEN
Thomas Rehmsmeyer
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.)
ABB Flexible Automation GmbH
Original Assignee
ABB Flexible Automation GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6432729&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0541745(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ABB Flexible Automation GmbH filed Critical ABB Flexible Automation GmbH
Publication of EP0541745A1 publication Critical patent/EP0541745A1/fr
Application granted granted Critical
Publication of EP0541745B1 publication Critical patent/EP0541745B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet

Definitions

  • the invention relates to a spray coating device according to the preamble of claim 1.
  • a spray coating device is known from DE-A-32 01 930, in which coating material (colored or transparent, paint, varnish) flows from one or more coating material containers to a coating material changer during the coating process and from there via a flow path to an atomizing device, which sprays the coating material onto an object to be coated. If the coating material changer is no longer supplied with coating material, the flow path is still filled with coating material. So that this coating material is not lost, it is pressed out of the flow path by an additional fluid (air, but preferably liquid, in particular solvent) starting from the coating material changer to close to the atomizing element of the atomizing device and sprayed onto the object to be coated by the atomizing device. The remnants remaining in the flow path are then expelled from the flow path by the same or a different fluid through a continuous or intermittent fluid surge.
  • additional fluid air, but preferably liquid, in particular solvent
  • Another spray coating device is known from EP-A-0 303 541, in which the paint supply lines between a color changing device and a spray head can be flowed through by means of appropriately arranged valves of cleaning fluid, the supply of the cleaning fluid being provided in opposite directions at two ends of the paint supply line.
  • a spray coating device of the type mentioned at the outset is known from US-A-4,728,034, in which two color changing devices are provided with integrated connections for cleaning fluid for cleaning the paint supply lines to the coating device, with a valve block being interposed, through which the flowed through during cleaning operation Cleaning fluid coming from the color changing devices is discharged, while a further injection of cleaning fluid flows up to the spray head of the coating device and exits there.
  • the drawing shows a spray coating device according to the invention for the automatic application of liquid coating material to motor vehicle bodies in particular by means of an atomizer device 2 for several, for example three, coating materials, in particular paints in a pressure vessel 4, 6 and 8.
  • the atomizer device 2 contains known means for electrostatically charging the Coating material.
  • a coating material changer 10 hereinafter called a color changer, contains, for example, six valves, preferably 2/2-way valves 12/1, 12/2, 12/3, 12/4, 12/5 and 12 / 6, so that, depending on the open directional valve, the coating material in question reaches the atomizing device 2 via a flow path 14.
  • a pressure regulator 16 which is effective for all coating materials and is referred to below as the color pressure regulator 16.
  • a compressed air source 20 can be connected in terms of flow to the flow path 14 via a check valve 22/1 and a 2/2-way valve 12/4 of the color changer 10.
  • the solvent of the pressure vessel 18 can be connected in terms of flow to the flow path 14 via a solvent pressure regulator 24/1, a check valve 22/2 and a 2/2-way valve 12/5 of the color changer 10.
  • the solvent pressure vessel 18 via a pressure regulator 24/2, a check valve 22/3 and a 2/2-way valve 12/6 of the color changer 10 can be connected in terms of flow to the flow path 14.
  • the solvent pressure vessel 18 can be connected in terms of flow via a pressure regulator 24/3 and a subsequent check valve 22/4 to a 2/2-way valve 12/7 of a secondary flushing device 30.
  • the secondary flushing device 30 also contains a 2/2-way valve 12/8, which is connected in terms of flow to the compressed air source 20 via a check valve 22/5.
  • the outputs 32 and 34 of the two 2/2-way valves 12/7 and 12/8 are connected to one another in terms of flow and connected to a fluid connection 36 of a first switching device 38.
  • the first switching device 38 is preferably a 3/2-way valve.
  • the first switching device 38 divides the flow path 14 into a first path section 40 leading from the color changer 10 to the first switching device 38 and a second path section 42 leading from the first switching device 38, from its flow connection 36, to the atomizing element 44 of the atomizing device 2.
  • the atomizing element 44 is preferred a rotating bell.
  • a measuring cell 46 is located in the first path section 40.
  • the 3/2-way valve of the first switching device 38 connects the first path section 40 in terms of flow with the second path section 42 in the switching position shown.
  • paint can be drawn from one of the pressure vessels 4 , 6 or 8 via the relevant valve 12/1 or 12/2 or 12/3 of the color changer 10 to the first path section 40 and from there via the first switching device 38 and the subsequent second path section 42 of the flow path 14 to the atomizing element 44 of the atomizing device 2 reach. If after this ink supply all valves 12/1, 12/2 and 12/3 of the different colors are closed, remains in the Flow path 14 (40, 42) a color liquid column.
  • the atomizing device 2 contains a second switching device 50 in the form of two valves 52 and 54.
  • the one valve 52 is located in the second path section 42 immediately upstream of the atomizing element 44, and the mentioned column end of the extended column of paint lies on the short intermediate piece 56 between this valve 52 and the atomizing element 44.
  • the other valve 54 of the second switching device 50 connects the second path section 42 directly upstream of the one valve 52 to a second return line 58 which leads to a collecting container 60.
  • one valve 52 is open and the other valve 54 of the second switching device 50 is closed.
  • the two valves 12/7 and 12/8 of the secondary flushing device 30 are closed.
  • the coating material and the solvent are conveyed by compressed air sources 20 connected to them.
  • the flow path 14 When no more coating material is conveyed to the atomizing device 2, and also the remaining coating material column remaining in the flow path 14 has been pushed out of it in the manner mentioned, the flow path 14 must be cleaned of coating material residues. For this purpose, it is possible to remove solvent from the pressure vessel 18 via one or the other of the two pressure regulators 24/1 and 24/2 and one of the valves 12/5 or 12/6 which adjoin the flow into the first path section 40 and from this via the first Switching device 38 also to promote through the second path section 42.
  • the solvent can escape through the one valve 52 of the second switching device 50 on the atomizing member 44, or can preferably be conveyed into the collecting container 60 when the valve 52 is closed and the further valve 54 of the second return line 58 is open.
  • the 3/2-way valve of the first switching device 38 is switched to a different position, according to the invention, to a so-called “rinsing” position. In this “purging” position, the two path sections 40 and 42 are no longer connected to one another in terms of flow via the fluid connection 36 of the first switching device 38, but are separated from one another in the first switching device 38.
  • the first path section 40 is connected via the first switching device 38 to a first return line 62, which likewise leads into the collecting container 60.
  • the solvent (or another rinsing agent) which is conveyed from the color changer 10 through the first path section 40 to the first switching device 38 does not get into the second path section 42, but directly from the first switching device 38 into the collecting container 60 , while the one valve 52 of the atomizing device 2 is opened and the other valve 54 is closed, the valves 12/7 and 12/8 of the secondary flushing device 30 are alternately opened and closed and as a result a solvent (or another flushing agent) is alternately released from the pressure container 18 via the pressure regulator 24/3 with a relatively high frequency sequence and the 2/2-way valve 12/7 and the next time compressed air from the compressed air source 20 via the 2/2-way valve 12/8 of the secondary flushing device 30 at the fluid connection 36 of the first switching device 38 into the upstream start of the second way section 42 and through conveyed through this
  • One valve 52 is thus always closed and the other valve 54 of the second switching device 50 is always open.
  • the one valve 52 can be briefly opened and at the same time the other valve 54 can be closed, so that then a shock of solvent and / or air from the secondary flushing device 30 the second path section 42 is dispensed via the atomizing element 44.
  • the flow path 14 is thus divided during the cleaning process into two path sections 40 and 42, which are preferably each of approximately the same length, at least each path section should still have a substantial length. If the flow path 14 is halved on two path sections, the time required for rinsing or cleaning the two path sections is also halved if this cleaning or rinsing takes place in parallel, that is to say simultaneously, according to the invention. At the same time, the consumption of cleaning agents or solvents is reduced, since the cleaning effect is greater on short distances than on long distances and less soiled cleaning material or solvent is more receptive to the paint to be cleaned.
  • a second coating material changer 210 for further different types of coating material and to connect it via a further first path section 240 and a further first switching device 238 to the same flow connection 36 at the beginning of the second path section 42, so that then either a color changer 10 and one of the first path section 40 or the other color changer 210 and its first path section 240 are connected to the second path section 42 and thus can use the latter together alternately.
  • the further first switching device 238 can in turn be formed by a 3/2-way valve, and can be connected to the collecting container 60 in terms of flow by means of a third return line 262. In this way, interruptions in operation are avoided even if a very large number of different coating materials are used alternately and in between individual material strands or pressure containers containing coating material have to be exchanged or cleaned.
  • An advantage of the invention is that by dividing the flow path into the sections 40 and 42 or 240 and 42 it is possible to clean the atomizer device 2 in a short time with little solvent through the secondary flushing device 30, without cleaning the first path section 40. This is expedient if, when using the same coating material, cleaning only the atomizer device 2 is necessary, for example during breaks in operation.
  • water-based paint is used as the coating material

Landscapes

  • Spray Control Apparatus (AREA)
  • Nozzles (AREA)

Abstract

Un dispositif de revêtement par pulvérisation permet d'appliquer automatiquement un enduit liquide, notamment sur des carrosseries de véhicules à moteur, au moyen d'un pulvérisateur (2) pour une pluralité d'enduits. Le dispositif contient une voie d'écoulement (14) des enduits qui s'étend entre un échangeur d'enduits (10) et le pulvérisateur (2). Lors d'un changement d'enduit, la voie d'écoulement (14) peut être rincée par un fluide. La voie d'écoulement (14) comprend un premier commutateur (38) qui permet de la subdiviser en au moins deux sections (40, 42) de rinçage qui peuvent être rincées séparément mais en même temps. La première section (40) s'étend de l'échangeur d'enduits (10) jusqu'au premier commutateur (38) et la deuxième section (42) s'étend du premier commutateur (38) jusqu'à l'organe pulvérisateur (44).

Claims (6)

  1. Dispositif de revêtement par pulvérisation pour l'application automatique de matière de revêtement liquide en particulier sur des carrosseries de véhicules automobiles à l'aide d'un dispositif de pulvérisation (2) pour plusieurs matières de revêtement, d'un trajet d'écoulement (14) pour les matières de revêtement, allant d'un changeur de matière de revêtement (10) vers le dispositif de pulvérisation (2), le trajet d'écoulement (14) pouvant être rincé à l'aide de solvant en cas de changement de la matière de revêtement, lequel trajet d'écoulement (14) de la matière de revêtement contient un premier dispositif de commutation (38) à l'aide duquel il peut être subdivisé, pour l'opération de rinçage, en au moins deux tronçons de trajet (40, 42) qui peuvent être rincés séparément, mais simultanément, parmi lesquels le premier tronçon de trajet (40) mène du changeur de matière de revêtement (10) jusqu'au premier dispositif de commutation (38) et le deuxième tronçon de trajet (42) mène du premier dispositif de commutation (38) jusqu'à l'organe de pulvérisation (44), le premier tronçon de trajet (40) et le deuxième tronçon de trajet (42) comprenant chacun son propre dispositif d'amenée de solvant (10, 30) pour amener le solvant utilisé pour le rinçage, et le dispositif d'amenée de solvant au moins du deuxième tronçon de trajet (42) étant un dispositif (30) fournissant en alternance une multitude d'impulsions d'air ou de solvant, caractérisé par le fait que la fin du premier tronçon de trajet (40) et le dispositif de pulvérisation (2) peuvent être reliés, pour l'opération de rinçage, avec un récipient collecteur (60), l'une au moyen du premier dispositif de commutation (38) en passant par une première conduite de retour (62) et l'autre au moyen d'un deuxième dispositif de commutation (50) en passant par une deuxième conduite de retour (58), et que les deux dispositifs de commutation (38, 50) isolent les deux conduites de retour (62, 58) des deux tronçons de trajet (40, 42) et libèrent tout le trajet d'écoulement (14) de façon continue pour le passage de matière de revêtement lorsqu'ils sont commutés de la position "rinçage" à la position "revêtement".
  2. Dispositif de revêtement par pulvérisation suivant la revendication 1, caractérisé par le fait que le deuxième dispositif de commutation (50) peut être commuté au choix de la position "rinçage" sur la position "revêtement" et inversement pendant que le premier dispositif de commutation (38) est commuté sur la position "rinçage".
  3. Dispositif de revêtement par pulvérisation suivant l'une des revendications 1 ou 2, caractérisé par le fait que le premier dispositif de commutation (38) est un distributeur multivoies commutable.
  4. Dispositif de revêtement par pulvérisation suivant l'une des revendications 1 à 3, caractérisé par le fait que le deuxième dispositif de commutation (50) se compose de deux valves (52, 54) dont une première valve (52) est disposée dans le tronçon de fin du deuxième tronçon de trajet (42) menant vers un organe de pulvérisation (44) du dispositif de pulvérisation (2) et dont l'autre valve (54) forme le début de la deuxième conduite de retour (58) qui dérive du deuxième tronçon de trajet (42) à proximité en amont de la première valve (52).
  5. Dispositif de revêtement par pulvérisation suivant l'une des revendications 1 à 4, caractérisé par le fait qu'il est prévu, séparément du trajet d'écoulement (14) de la matière de revêtement, un dispositif d'amenée (330) pour amener séparément du produit de rinçage à l'organe de pulvérisation (44) du dispositif de pulvérisation 2.
  6. Dispositif de revêtement par pulvérisation suivant l'une des revendications 1 à 5, caractérisé par le fait qu'il comprend au moins un deuxième changeur de matière de revêtement (210) pour plusieurs matières de revêtement, dont le trajet d'écoulement (14) pour ses matières de revêtement est formé par un premier tronçon de trajet (244) menant dudit changeur jusqu'à un autre premier dispositif de commutation (238) et par le deuxième tronçon de trajet (42) utilisable, à partir des premiers dispositifs de commutation (38, 238), au choix, pour toutes les matières de revêtement.
EP92910645A 1991-05-29 1992-05-22 Dispositif de revetement par pulverisation Revoked EP0541745B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4117613 1991-05-29
DE4117613A DE4117613A1 (de) 1991-05-29 1991-05-29 Spruehbeschichtungsvorrichtung
PCT/EP1992/001150 WO1992021447A1 (fr) 1991-05-29 1992-05-22 Dispositif de revetement par pulverisation

Publications (2)

Publication Number Publication Date
EP0541745A1 EP0541745A1 (fr) 1993-05-19
EP0541745B1 true EP0541745B1 (fr) 1995-10-11

Family

ID=6432729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910645A Revoked EP0541745B1 (fr) 1991-05-29 1992-05-22 Dispositif de revetement par pulverisation

Country Status (5)

Country Link
EP (1) EP0541745B1 (fr)
AU (1) AU1763992A (fr)
DE (2) DE4117613A1 (fr)
MX (1) MX9202533A (fr)
WO (1) WO1992021447A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315223A1 (de) * 1993-05-07 1994-11-10 Abb Patent Gmbh Verfahren und Vorrichtung zur Potentialtrennung
DE4342128A1 (de) * 1993-12-10 1995-06-14 Abb Patent Gmbh Farbauftragvorrichtung
DE4423643A1 (de) * 1994-07-06 1996-01-11 Ind Lackieranlagen Schmidt Gmb Einrichtung zum Lackieren von Gegenständen mit verschiedenen Farben
WO1997024189A1 (fr) * 1995-12-29 1997-07-10 Ingenieurbüro Inovac Procede et dispositif pour recouvrir des objets avec des types de produits de recouvrement qui changent souvent
DE19610589A1 (de) * 1996-03-18 1997-09-25 Duerr Gmbh & Co Verfahren und System zur Farbversorgung einer Beschichtungsanlage
SE508510C2 (sv) * 1997-02-24 1998-10-12 Abb Flexible Automation As Anläggning och förfarande för automatisk sprutlackering
DE19819339A1 (de) * 1998-04-30 1999-12-09 Lactec Gmbh Verfahren und Vorrichtung zum Prüfen der Dichtigkeit der Ventile an Farbwechslern zur seriellen Verarbeitung verschiedenartiger Lacke
DE10129667A1 (de) * 2001-06-20 2003-01-02 Abb Patent Gmbh Reinigungsvorrichtung für Luftkappen an Lackierpistolen

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US3717929A (en) * 1970-06-03 1973-02-27 Du Pont Method of making alkali metal-filled electrical conductors and terminations therefor
US4159806A (en) * 1977-09-12 1979-07-03 Ransburg Corporation Operation sequence control system
JPS6051867B2 (ja) * 1980-08-04 1985-11-15 日本ランズバ−グ株式会社 塗料色替え方法
US4375865A (en) * 1980-08-12 1983-03-08 Binks Manufacturing Company Color change system for spray coating apparatus
US4487367A (en) * 1982-10-14 1984-12-11 General Motors Corporation Paint color change and flow control system
DE3312268A1 (de) * 1983-04-05 1984-10-11 Hermann Behr & Sohn Gmbh & Co, 7121 Ingersheim Farbumlaufanlage fuer eine lackieranlage
US4728034A (en) * 1986-02-06 1988-03-01 Trinity Industrial Corporation Cleaning device upon color-change in an electrostatic mutli-color coating apparatus
FR2616086B2 (fr) * 1987-05-19 1990-01-26 Sames Sa Installation de projection de produit de revetement, a pompe
DE3725172A1 (de) * 1987-05-27 1989-02-09 Behr Industrieanlagen Verfahren und anlage zum elektrostatischen beschichten mit leitfaehigem material
EP0303541B1 (fr) * 1987-08-14 1991-10-09 Sames S.A. Installation de projection de produit de revêtement tel que par exemple une peinture hydrosoluble
US4792092A (en) * 1987-11-18 1988-12-20 The Devilbiss Company Paint color change system
DE3817997A1 (de) * 1988-05-27 1989-12-07 Babcock Werke Ag Vorrichtung zum reinigen einer leitung
US4932589A (en) * 1988-09-30 1990-06-12 Binks Manufacturing Company Method of and apparatus for electrical isolation of electrostatic sprayers
DE3927880C2 (de) * 1989-08-23 1998-07-30 Behr Industrieanlagen Verfahren und Anlage zum Beschichten von Gegenständen mit häufig wechselndem Farbmaterial
DE9106610U1 (de) * 1991-05-29 1991-10-02 Ransburg Gmbh, 6056 Heusenstamm Sprühbeschichtungsvorrichtung

Also Published As

Publication number Publication date
AU1763992A (en) 1993-01-08
DE59203985D1 (de) 1995-11-16
DE4117613A1 (de) 1992-12-03
MX9202533A (es) 1993-12-01
WO1992021447A1 (fr) 1992-12-10
EP0541745A1 (fr) 1993-05-19

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