EP1502658B1 - Dispositif de pulvérisation avec changeur de couleur pour revêtir en série des pièces d'oeuvre - Google Patents

Dispositif de pulvérisation avec changeur de couleur pour revêtir en série des pièces d'oeuvre Download PDF

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Publication number
EP1502658B1
EP1502658B1 EP04016359A EP04016359A EP1502658B1 EP 1502658 B1 EP1502658 B1 EP 1502658B1 EP 04016359 A EP04016359 A EP 04016359A EP 04016359 A EP04016359 A EP 04016359A EP 1502658 B1 EP1502658 B1 EP 1502658B1
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EP
European Patent Office
Prior art keywords
valve
collecting channel
piston
needle
valve units
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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.)
Expired - Lifetime
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EP04016359A
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German (de)
English (en)
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EP1502658A1 (fr
Inventor
Stefano Giuliano
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Duerr Systems AG
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Duerr Systems AG
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    • 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
    • B05B12/1409—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 the selection means being part of the discharge apparatus, e.g. part of the spray gun
    • 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
    • B05B12/149—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 characterised by colour change manifolds or valves therefor

Definitions

  • the invention relates to a mounted on the hand axis of a robot or other multi-axis manipulator machine or mountable spray device according to the preamble of claim 1, for example a possibly electrostatic atomizer for coating material for serial coating of vehicle bodies or other workpieces.
  • a spray device is known from US 605 0 498 ,
  • the robots or other programmatically movable machines if necessary exchangeably mounted atomizers, are connected to the required color change and metering systems of the system by external hose lines.
  • the color changers usually consist of a number of modular valve units corresponding to the selectable colors, which are joined together to form a block with a common, generally straight collection channel and which can each be connected to a ring line for the relevant color ( EP 0 979 964 ).
  • Color changers of this type are also known, which, for space reduction, comprise a spiral groove arranged at right angles to the longitudinal axis of the color change block instead of the usual straight collecting channel ( DE 43 39 301 ), which is less aerodynamic.
  • Such color changers basically allow a quick change between the available colors during the painting operation. Although it is known that they should be arranged as close as possible to the ink application device, the color change valve arrangements were previously in practice always outside of the atomizer. For color dosing volumetrisch working Zahnraddosierpumpen or Kolbendosier boots (dosing) are used, which in modern systems gemolchten color lines upstream or downstream ( DE 100 33 987 . DE 101 57 966 . DE 101 57 938 etc.).
  • the dosage is also known with ink quantity control loops, which consist essentially of an electronic universal controller as a control element, serving as an actuator color pressure regulator and a flow measuring device for actual value detection and serving as a shut-off main needle valve upstream of the usual atomizer (Dürr / Behr Technical Handbook 02 / 1994 "Farbmengenregelung”; DE 101 42 355 ).
  • ink quantity control loops consist essentially of an electronic universal controller as a control element, serving as an actuator color pressure regulator and a flow measuring device for actual value detection and serving as a shut-off main needle valve upstream of the usual atomizer (Dürr / Behr Technical Handbook 02 / 1994 "Farbmengenregelung"; DE 101 42 355 ).
  • the nebulizer is intended to include a metering valve forming the main needle valve of the nebulizer as a controlled flow rate effluent of the coating material which replaces a metering pump or other volumetric doser.
  • the invention has for its object to avoid the disadvantages of the known systems and to provide a spray device of the type considered, which allows the lowest possible color change losses and at the same time shorter color change times. Preferably, this should be achieved with a small footprint.
  • the invention has due to the short line connection between the color change valve assembly and the spray inside of the spray device forming atomizer the essential advantage of extremely low Farbund time losses in a color change and at the same time allows a very favorable rinsing arrangement, which may be sufficient, the small between color changer and Rinse paint tube nozzle of the atomizer remaining paint residue through the nozzle as in the usual Kurz Whyvorgang. For the same reasons, there are slight color losses and defined conditions when pressing the paint to the paint tube. The number of required components of the system is reduced to a minimum, which can be dispensed with otherwise usual function valves such as scavenging blocks. By using long-proven components, simple construction and highest reliability result. It is also advantageous that essentially the entire application technique can be laid in the atomizer and no application components have to be arranged more in the robot or the other application machine.
  • this is used as a metering pump in the DE 102 13 270 ( EP 1 348 487 ) described valveless piston pump whose piston is rotated at each stroke about its axis extending in the stroke direction, and which is characterized by many significant advantages.
  • advantages include, among other things, the very low dead volume of the pump with the result correspondingly low color and detergent losses during color change, the fast and effective purging of the pump head with the result of high productivity and process reliability when coating workpieces and the high dosing accuracy ( ⁇ 0.2%) without pulsation and dynamic problems.
  • the low weight and the small size of the pump are particularly important, so that it also fits into small atomizers, as they are especially desirable for painting robots for coating narrow and difficult to access workpiece areas including interiors and with good dynamic properties.
  • this pump can handle small and light drives while, on the other hand, allowing for high delivery pressure, which may be required, for example, for some high viscosity coating materials.
  • the pump has the advantage of simple and less maintenance-intensive design with little moving parts, in particular only one easily producible with minimal tolerance piston in the flow space.
  • the invention can also be realized with known per se other volumetric dosing pumps, for example with a small constructed as possible gear pump.
  • the spray device according to the invention may be, for example, an electrostatic, external and / or internal charging of the coating material or in special cases also working without charging rotary atomizer, as are customary, for example, for the exterior painting of vehicle bodies, but the invention is not limited thereto.
  • the above-mentioned valveless piston metering pump could be arranged particularly advantageously, inter alia with regard to the required material pressure, in an air-assisted airless atomiser directly in front of the atomizer nozzle.
  • the airless atomizing effect is known to be based on the pressure of the coating material to be sprayed, for example the seam sealing material for vehicle bodies.
  • At least for rarely needed shades can also be provided two alternately operating in A / B operation valve units.
  • the ink supply lines of the color change valve arrangement can be suitably gemolcht in a conventional manner.
  • valves of the color change valve assembly provided by a solenoid valve or a different type of electric valve pilot operated pneumatic valves, which are connected by an included in the valve assembly electrical connection arrangement with an electronic control system or connectable.
  • each pneumatic valves are opened and closed by compressed air or another compressed gas from a leading through the color changer to all valves common compressed gas line, and within the color changer is in each case a solenoid valve switched into the compressed gas path of the pneumatic valve.
  • the color changer may provide a data bus for digital control data coupled to the solenoid valves via an electronic circuit. It thus accounts for the previously required numerous Steuer Kunststoffschläuche the color changer.
  • connection lines of the color changer by the hand axis of the manipulator machine can by the way in the EP 1 285 733 described rotational decoupling can be solved.
  • this solution is an inner part of the atomizer on which the color changer and his Are mounted line arrangement, rotatably mounted for decoupling from the rotational movements of the wrist relative to the atomizer side flange.
  • the in Fig. 1 schematically illustrated rotary atomizer 1 contains the spray head 2 forming, for example, in a known manner driven by an air turbine rotating bell, a color change valve arrangement designated 3, hereinafter referred to as color changer and arranged between the color changer 3 and the spray head 2 metering pump 4, the spray head the to be sprayed coating material via a controlled valve assembly 5, which contains, for example, the usual main needle valve.
  • the color changer 3 consists essentially of a number of color valve units F1, F2 ... Fn and possibly one or more Spülventilikien, the input side to associated color supply lines L1, L2 and Ln for each a different hue are connected and open into a central straight, common to all valve units collecting channel SK.
  • the collecting channel can be arranged coaxially with the axis of rotation of the atomizer 1 and is connected at its output to the metering pump 4.
  • the arrangement of the modular and formed from needle valves valve units F1, F2, etc. on the collecting channel SK, for example, from the EP 0 979 964 correspond to known construction, the paint supply can have return lines in the manner of a loop for constant color circulation, but does not have to have.
  • the collecting channel SK can be flushed in a likewise known manner.
  • To drive the metering pump 4 for example, one of a located outside of the atomizer 1 motor driven flexible shaft 6 may be provided.
  • Fig. 2 also schematically shows a rotary atomizer 21 extending from the Fig. 1 differs in that its built-metering pump 24 is reversible, so it can promote in the direction back to the color changer 3.
  • the valve assembly 25 of the atomizer may include a valve 26 for detergent, for example, to rinse the Sammelkanäls the color changer 3.
  • the atomizer may be mounted on the wrist 27 of a painting robot 20 in which the arm 28 carrying the wrist may be the motor M which drives the metering pump 24, for example via the flexible shaft 6.
  • Fig. 3 can an atomizer 21 ', the rest of the embodiment according to Fig. 1 or Fig. 2 may also be removably and interchangeably arranged on the wrist 27.
  • a coupling arrangement 32 on the mounting flange 30 of the atomizer and on the mounting flange 31 of the wrist known type which may include in particular also quick-change couplings for connected to the color changer 3 hose and other lines including required in the case of electrically pilot operated pneumatic valves electrical control lines.
  • the atomizer 21 ' may be manually or preferably automatically decoupled from the manipulator machine.
  • Automatic atomizer change systems are known per se, for example from the EP 1 245 296 ,
  • valveless piston pump 40 may be used. Like in the DE 102 13 270 is described in more detail, it consists in the main of a displaceable in a cylinder bore 42 along its axis cylindrical piston 43 and a direction indicated by the arrow 44 at the drive motor which moves the piston and at the same time rotates according to the arrow 45. Coaxially opposite bores, which serve as outlet opening 41 and inlet opening 48, lead into the cylinder bore 42. According to the known working principle of this valveless piston pump rotates once per reciprocating motion of the piston 43 once around its own axis.
  • the flat part 46 opens the inlet opening 48 at the front end of the piston.
  • the colored lacquer to be delivered and dispensed is sucked in and the pumping chamber 49 filled.
  • the inlet port 48 is closed by the piston 43, and with the opening of the outlet port 41, the discharge stroke begins.
  • a separate color pressure regulator can be provided for each color.
  • a control loop can also be used in the DE 101 42 355 be described type, whose switched to the color printing line color pressure regulator consists of a pneumatically or electrically driven needle valve, or in which, according to a development instead of the color changer downstream separate color pressure regulator, the color control valves of the color changer are each formed as an actuator, for example in the form of a needle valve.
  • FIG. 1 to 3 Another embodiment of the embodiments according to Fig. 1 to 3 is to provide as a drive of the valve needle of the aforementioned main needle valve of the atomizer a proportional solenoid for very short reaction times, as also in the DE 101 42 355 is described.
  • a color changer 3 of the embodiments according to Fig. 1 to 3 can for the reasons explained in the beginning expedient in Fig. 5 shown color changer are used, which also in the mentioned EP 150 2 659 A1 (corresponding DE 103 34 410.1 ) is described. It is accordingly a color changer miniaturized for the purposes of this example in the longitudinal direction of the common collecting channel 101 common to all valve units 101, which is composed of a number of modules 102 successively arranged along the collecting channel, each of which comprises four valve units distributed in a star shape at uniform angular intervals around the collecting channel 103 and 103 'included, the needle axes are in the illustrated example in a common plane perpendicular to the collecting channel 101. If the valve units are to open in a conventional manner with a different angle of 90 ° of their needle axes in the collecting channel 101, are at least the centers of the valve seats of the four valves in a common plane transverse to the collecting channel.
  • valve units of adjacent sections 102 of the color changer are shown offset from one another in each case such that the valve units 103 of the one plane lie in the circumferential direction of the collecting channel 101 in each case in the middle between the adjacent valve units 103 'of the other plane.
  • Fig. 5 shown arrangement of four arranged in a star pin valves in each level of the modular terminal block of the color changer is in many cases an optimum in particular with regard to color change losses, which among other things also depend on the required diameter of the collecting channel. If, nevertheless, an even flatter design is preferred, a larger number of valves can also be distributed in a plane around the collecting channel, for example six or eight valve units. Not only, but especially in this case unwanted color change losses can be avoided by other measures such as by reducing the collecting channel cross-section through a central inner body (see. DE 102 12 601 ).
  • the color changer can be connected via a quick-change coupling arrangement to its connecting lines including the supply and control lines.
  • Fig. 5 explained possibility of shortening the required length of the common collecting channel by the angular offset arrangement of the valve units 103 and 103 'is not on the example described in each Level is limited to a plurality of valve units distributed around the collecting channel, but can be generalized to reduce the space required transversely to the collecting channel to the arrangement of only two valve units or even only one valve unit at each level.
  • a single row of valve units may be arranged, in which adjacent valve units are offset from one another by an appropriately selected angle, for example by approximately 45 °, along the collecting channel, such that two interleaved groups each extend longitudinally the collecting channel aligned valve units are formed.
  • the offset angle should be as small as possible in order to save space in the direction transverse to the collecting channel and transversely to the two valve groups, but on the other hand must be chosen such that the distance of the needle axes measured in the longitudinal direction of the collecting channel is smaller than that also in this longitudinal direction measured maximum diameter of the valve units, although a space saving in the longitudinal direction of the collecting channel to be achieved.
  • the mutual distance of the needle longitudinal axes of the adjacent valve units should therefore be smaller than the minimum distance they would have to have the same outer dimensions of the valve units, if the adjacent valve units would be aligned with each other without angular displacement as in known color changer.

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  • Spray Control Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Claims (11)

  1. Pulvérisateur pour produit de revêtement pour le revêtement en série de pièces à travailler, qui est ou peut être monté sur un robot ou une autre machine de manipulation multiaxiale, comprenant
    au moins une tête de pulvérisation (2)
    ainsi qu'un ensemble de vannes de changement de couleur (3) pour le raccordement sélectif de la tête de pulvérisation (2) à des conduites (L1, L2, Ln) amenant un produit de revêtement de couleur différente,
    dans lequel une pompe (4, 24) dosant le produit de revêtement se trouve dans le dispositif de pulvérisation (1, 21) entre l'ensemble de vannes de changement de couleur (3) et la tête de pulvérisation (2),
    caractérisé en ce que l'ensemble de vannes de changement de couleur (3) se compose d'un certain nombre d'unités de vanne à tige ou à pointeau (F1, F2, Fn) modulaires qui débouchent sur un canal collecteur (SK) droit, central, et sont réparties autour du canal collecteur dans des plans adjacents le long du canal collecteur (SK).
  2. Pulvérisateur selon la revendication 1, caractérisé en ce que la pompe de dosage (4, 24) est une pompe à piston sans clapet, dont le piston (43) est tourné à chaque course autour de son axe s'étendant dans la direction de course.
  3. Pulvérisateur selon la revendication 1 ou 2, caractérisé en ce que l'ensemble de vannes de changement de couleur (3) comprend des unités de vanne (103) pour les couleurs à sélectionner, qui présentent respectivement
    - une ouverture de sortie pour le produit de revêtement circulant vers l'organe d'application, qui forme un siège de vanne,
    - un pointeau monté mobile dans l'unité de vanne (103) et qui présente une surface d'étanchéité appliquée contre le siège de vanne lorsque la vanne est fermée,
    - au moins un piston relié au pointeau et qui est chargé par un milieu sous pression pour l'entraînement du pointeau,
    - et un dispositif constitué en particulier par un ressort, qui exerce sur le pointeau une force dirigée à l'opposé de la pression du milieu sous pression,
    dans lequel un dispositif d'entraînement pour charger le piston avec le milieu sous pression est prévu,
    les vannes débouchent sur un canal collecteur (101) qui leur est commun, et
    au moins deux unités de vanne (103) sont disposées côte à côte avec des plans de pointeau parallèles entre eux le long du canal collecteur (101).
  4. Pulvérisateur selon la revendication 3, caractérisé en ce que des moyens pour renforcer la force exercée par le dispositif d'entraînement sur le piston et/ou pour réduire la force dirigée à l'opposé, nécessaire et à surmonter par le dispositif d'entraînement.
  5. Pulvérisateur selon la revendication 4, caractérisé en ce que l'ensemble de vannes de changement de couleur (3) présente au moins une ou plusieurs des particularités suivantes :
    a) la surface d'étanchéité du pointeau, opposée à la surface du siège de vanne, de préférence y compris la surface frontale de la pointe de pointeau et/ou la surface du siège de vanne, se compose d'un matériau élastomère ;
    b) le ressort présente une courbe caractéristique dégressive ;
    c) le piston présente au niveau de la surface chargée par le milieu sous pression une section non circulaire, par exemple plate, rectangulaire ou ovale ;
    d) le milieu sous pression est amené à partir d'une source de pression à une pression de plus de 10 bars, de préférence d'au moins 20 bars ;
    e) le dispositif d'entraînement comprend au moins deux surfaces de piston disposées successivement le long de l'axe de mouvement de piston, respectivement chargées par le milieu sous pression ;
    f) le dispositif d'entraînement comprend un transducteur pour renforcer la force du milieu sous pression ;
    g) le dispositif d'entraînement à qui le milieu sous pression est amené se trouve en dehors de l'unité de vanne (103) et est relié à celle-ci par un élément d'entraînement mécanique de préférence flexible.
  6. Pulvérisateur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins deux unités de vanne (103, 103') de l'ensemble de vannes de changement de couleur (3), dont les ouvertures de sortie se trouvent dans un plan s'étendant transversalement à l'axe longitudinal du canal collecteur (101) qui leur est commun, sont disposées en étant réparties autour de l'axe longitudinal du canal collecteur.
  7. Pulvérisateur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins deux unités de vanne (103, 103') adjacentes dans la direction longitudinale du canal collecteur (101) sont disposées autour du canal collecteur (101) en étant décalées d'un espacement angulaire de leurs axes de pointeau de moins de 90 C, et l'espacement des axes de pointeau, mesuré dans la direction longitudinale du canal collecteur (101), est inférieur au diamètre maximal des unités de vanne (103, 103'), également mesuré dans cette direction longitudinale.
  8. Pulvérisateur selon la revendication 7, caractérisé en ce qu'au moins deux unités de vanne (103), dont les ouvertures de sortie se trouvent dans un premier plan commun (102) s'étendant transversalement à l'axe longitudinal du canal collecteur (101), sont disposées en étant réparties autour de l'axe longitudinal du canal collecteur (101), et en ce qu'au moins deux autres unités de vanne (103'), dont les ouvertures de sortie se situent dans un deuxième plan parallèle au premier plan, sont disposées en étant réparties autour de l'axe longitudinal du canal collecteur de telle sorte que les unités de vanne (103) dudit un plan se trouvent dans la direction circonférentielle du canal collecteur entre les unités de vanne (103') de l'autre plan.
  9. Pulvérisateur selon l'une quelconque des revendications 6 à 8, caractérisé en ce que respectivement au moins trois unités de vanne (103, 103') sont disposées en étant réparties à des intervalles angulaires réguliers autour de l'axe longitudinal du canal collecteur (101).
  10. Pulvérisateur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble de vannes de changement de couleur (3) présente une conduite sous pression commune à toutes les unités de vanne (103), à partir de laquelle le milieu sous pression peut être amené aux unités de vanne (103), et en ce que chaque unité de vanne (103) présente une vanne pilotée électriquement et interposée entre son dispositif d'entraînement et la conduite sous pression commune.
  11. Pulvérisateur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble de vannes de changement de couleur (3) est muni d'un ensemble de couplage à changement rapide, au moins pour les conduites de raccordement des unités de vanne (103).
EP04016359A 2003-07-28 2004-07-12 Dispositif de pulvérisation avec changeur de couleur pour revêtir en série des pièces d'oeuvre Expired - Lifetime EP1502658B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10334412 2003-07-28
DE10334412 2003-07-28

Publications (2)

Publication Number Publication Date
EP1502658A1 EP1502658A1 (fr) 2005-02-02
EP1502658B1 true EP1502658B1 (fr) 2009-08-26

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EP04016359A Expired - Lifetime EP1502658B1 (fr) 2003-07-28 2004-07-12 Dispositif de pulvérisation avec changeur de couleur pour revêtir en série des pièces d'oeuvre

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Country Link
US (1) US7140559B2 (fr)
EP (1) EP1502658B1 (fr)
AT (1) ATE440674T1 (fr)
DE (1) DE502004009952D1 (fr)
ES (1) ES2330632T3 (fr)

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JP3513050B2 (ja) 1998-11-13 2004-03-31 トヨタ自動車株式会社 塗装ロボットおよび塗装ロボットの組み立て方法
US6705545B1 (en) * 1998-11-13 2004-03-16 Steelcase Development Corporation Quick color change powder paint system
US6589342B2 (en) * 2001-04-02 2003-07-08 Abb Automation Inc. Powder paint color changer
KR100391981B1 (ko) 2001-06-16 2003-07-22 삼성전자주식회사 복수의 안테나를 통해 전송된 신호에서 데이터를 재생하는장치
DE10142355A1 (de) 2001-08-30 2003-03-20 Duerr Systems Gmbh Beschichtungsanlage mit einem Regelkreis
DE10212601A1 (de) 2002-03-21 2003-10-02 Duerr Systems Gmbh Zerstäuber für eine Beschichtungsanlage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3132855A1 (fr) * 2022-02-24 2023-08-25 Exel Industries Dispositif d’alimentation d’un pulvérisateur, modules pour un tel dispositif d’alimentation et installation d’application de produit de revêtement comprenant un tel dispositif d’alimentation
EP4234099A1 (fr) * 2022-02-24 2023-08-30 Exel Industries Dispositif d'alimentation d'un pulvérisateur, modules pour un tel dispositif d'alimentation et installation d'application de produit de revêtement comprenant un tel dispositif d'alimentation

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US7140559B2 (en) 2006-11-28
EP1502658A1 (fr) 2005-02-02
ATE440674T1 (de) 2009-09-15
DE502004009952D1 (de) 2009-10-08
US20050029368A1 (en) 2005-02-10
ES2330632T3 (es) 2009-12-14

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