EP1584376B1 - Procédé de transport d'un materiau de revêtement et machine de revêtement - Google Patents

Procédé de transport d'un materiau de revêtement et machine de revêtement Download PDF

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Publication number
EP1584376B1
EP1584376B1 EP05007326A EP05007326A EP1584376B1 EP 1584376 B1 EP1584376 B1 EP 1584376B1 EP 05007326 A EP05007326 A EP 05007326A EP 05007326 A EP05007326 A EP 05007326A EP 1584376 B1 EP1584376 B1 EP 1584376B1
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EP
European Patent Office
Prior art keywords
coating
connecting line
coating machine
coating material
applicator
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.)
Active
Application number
EP05007326A
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German (de)
English (en)
Other versions
EP1584376A2 (fr
EP1584376A3 (fr
Inventor
Jürgen Haas
Stefan Esslinger
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.)
Duerr Systems AG
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Duerr Systems AG
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Publication of EP1584376A2 publication Critical patent/EP1584376A2/fr
Publication of EP1584376A3 publication Critical patent/EP1584376A3/fr
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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
    • B05B12/1481—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 comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0431—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to 3D-surfaces

Definitions

  • the invention relates to a method for conveying a coating material in a program-controlled multi-axis coating machine with an application device and to such a coating machine for the serial coating of workpieces according to the preamble of the independent patent claims.
  • the coating machine may in particular be one of the known painting robots, as are customary for the at least predominantly electrostatic exterior and interior painting of workpieces such as vehicle bodies or, for example, in the automobile supplier industry and their attachments ( JOT 1/2004, p. 12-13 ).
  • pigs not only serve to push back color paint during a color change, but also to supply the coating material to the atomizer before or during a coating operation or to convey washing agent through the system and, if necessary, to the atomizer or from the latter in the reverse direction ( EP 1 270 083 . EP 1 362 641 . EP 1 362 642 ).
  • Such hoses can only be produced with a relatively large diameter, whereby it must also be taken into account that too small inner diameters lead to undesirably high pressure losses.
  • the relatively thick tubes are correspondingly stiff and less flexible, so that they are poorly bendable within the joints.
  • a method for pushing back the color coat remaining in the supply line of a painting device during a color change is already known, in which the line is emptied by deformation similar to the known peristaltic pump principle.
  • a relatively soft inner tube is used as the supply line, which is surrounded by a pressure-resistant outer tube, and passed into the gap between the inner and outer tubes compressed air or another pressure medium, which acts on the outer circumference of the inner tube.
  • the hose assembly connects a nebulizer to a color change valve assembly
  • compressed air is passed between outer jacket and inner tube during color change on the nebulizer side, and since the jacket does not yield, the inner tube is compressed from the nebulizer to the color changer and thereby the residual paint of the supply tube into the nipple Supply system returned.
  • the stated aim of the known method is to avoid brittle lines.
  • This process also known as "squeeze-out” is the pigging technique but in different inferior.
  • the inner tube is prone to elongation due to the bruising repeated with each color change. For these reasons, such tube systems are relatively poor for painting robots and other coating machines in which long tubes of, for example, more than 20 m are required.
  • the invention has for its object to provide a method or a coating machine with a gememchten within the machine line with which on the one hand largely the main advantage of the pig technology can be used, namely the almost complete emptying of the gemoldten line, while on the other hand, at least in the vicinity of the coating device no bulky joint with large interiors is necessary.
  • the invention is based on the finding that all the above-described problems can be solved in a nearly perfect manner, if the proven pigging technology is meaningfully combined with the per se known hose crimping method. If you place the pig target station in the coating machine such as in a robotic arm as close to the atomizer, but still in front of a joint such as the robot's hand axis undesirable narrow for the pigging technology Interior, can be used between the supply system and this destination unrestricted all advantages of pig technology such as low detergent consumption and high efficiency of paint recovery even with long hoses.
  • the method described herein is particularly applicable to repressing the residual color remaining before a color change in the supply lines to the atomizer, the described advantages of the invention may also be important in the evacuation of hoses in the direction of the atomizer.
  • the drawing shows schematically and greatly simplifies the cable entry through the wrist of a painting robot.
  • a hollow three-axis wrist 2 is attached to the robot arm 1, to which an electrostatic rotary atomizer 3 is flanged.
  • Such constructions are known and customary and therefore require no further description.
  • bendable lines 4A and 4B for ink supply of the atomizer in A / B operation the well-known allows a time-saving color change. By eliminating the time gained by A / B operation with two parallel lines, a single line 4 would suffice.
  • two ummchte supply lines 5A and 5B which are performed by a remote (not shown) color change valve assembly through the arm 1 to a arm end arranged at the pig station 6 and in particular from multi-layered hoses in the DE 102 39 516 described type can exist.
  • the color-changing valve assembly is in turn connected to a supply system located at least partially outside the coating machine, which may include ring loops leading to the color changer.
  • a control valve assembly 7 is shown only schematically or in the pig station 6 is provided.
  • connection lines 4A and 4B leading from the pig station 6 to the atomizer 3 each consist of a squeeze hose system in the WO 03/086671 A1 described type, ie from a soft elastic, radially compressible inner tube and the inner tube in the idle state preferably tightly fitting pressure-tight jacket tube.
  • a squeeze hose system in the WO 03/086671 A1 described type, ie from a soft elastic, radially compressible inner tube and the inner tube in the idle state preferably tightly fitting pressure-tight jacket tube.
  • a pressure medium such as Compressed air to be passed.
  • the channel 10 and the valve 11 may be located within the atomizer 3 or at its mounting flange.
  • the inner tube 42 Due to the nature of the tubes 41 and 42 is compressed by the pressure medium, the inner tube 42 to its emptying in the known manner, wherein the pressure medium at the opposite end of the respective line 4A can be removed by a further controlled valve 14.
  • the pressure of the pressure medium is sufficiently higher than the pressure prevailing in the line system lacquer pressure against which the remaining paint in the tube 42 is to be pushed back.
  • the inner tube 42 of an elastomeric plastic such as TPU (thermoplastic polyurethanes) and the jacket tube made of a plastic such as PA (polyamide) or FEP (fluorinated ethylene propylene) exist.
  • the material for the inner tube it should be taken into account, inter alia, that it should be compressible up to a passage cross-section of almost zero that can withstand considerable mechanical stress without elongation or other damage over a long period of operation and also possibly resistant to a solvent used ,
  • to supply the atomizer 3 Farblack can be promoted in a known manner by the mentioned color change valve arrangement forth through the umgelchte supply line 5A and the connecting line 4A to the atomizer, for example using a piston meter or other metering pump. If a color change is required after completion of the coating operation, the connection between the atomizer-side end of the conduit 4A and the atomizer is blocked and the colored paint left in the conduit 4A by introducing the pressure medium through the valve 11 opened for this purpose and the resulting squeezing of the inner tube 42 pushed back in the known manner to the pig station 6, from where he then from a pig waiting there through the supply line 5A back to a loop or container of the paint supply system.
  • the invention has the above-mentioned significant advantages.
  • the achievable according to the invention reduction of space requirements is particularly clear. If one considers the representation of the wrist 2 with the lines 4A and 4B as approximately true to scale, would be required for a gemoltes connection system hose package of paint and control lines almost fill the entire interior of the same wrist, so that the required mobility would not be guaranteed and the Wrist 2 would have to be replaced by a larger, so unwanted bulky construction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Spray Control Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (9)

  1. Procédé pour transporter une matière de revêtement dans une machine à enduire multiaxiale, à cycles automatiques, comprenant un dispositif d'application (3),
    dans lequel la matière de revêtement est amenée au dispositif d'application (3) par au moins une conduite d'alimentation raclée (5A, 5B) à l'intérieur de la machine à enduire et raccordée à un système d'alimentation, et
    dans lequel la matière de revêtement est transportée à travers une conduite de connexion (4A, 4B) qui passe entre la conduite d'alimentation raclée (5A, 5B) et le dispositif d'application (3) à travers l'espace intérieur d'une construction articulée (2) de la machine à enduire,
    caractérisé en ce que la matière de revêtement est transportée à travers la construction articulée (2) par la déformation d'un tuyau flexible (42), mis sous pression par un milieu sous pression, de la conduite de connexion (4A, 4B),
    dans lequel la matière de revêtement restant dans la conduite de connexion (4A, 4B) après une opération d'enduction est repoussée jusque dans la conduite d'alimentation raclée (5A, 5B) par la déformation de la conduite de connexion, ou bien la conduite de connexion (4A, 4B) est vidée en direction du dispositif d'application (3).
  2. Procédé selon la revendication 1, caractérisé en ce que la périphérie extérieure d'un tuyau flexible intérieur (42) de la conduite de connexion (4A) est mise sous pression par un milieu sous pression en vue de sa déformation, le milieu étant guidé entre le tuyau flexible intérieur (42) et une enveloppe (41) entourant de façon coaxiale le tuyau flexible intérieur (42).
  3. Procédé selon l'une quelconque des revendications 1 et 2, caractérisé en ce que la matière de revêtement est repoussée par la déformation de la conduite de connexion (4A, 4B) depuis le dispositif d'enduction (3) à travers une articulation de poignet (2) de la machine à enduire, articulation sur laquelle est monté le dispositif d'enduction (3), jusqu'à une station de raclage (6) qui se trouve du côté détourné du dispositif d'enduction (3) de l'articulation de poignet (2) à proximité du dispositif d'enduction (3) dans ou sur un bras (1) de la machine à enduire.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la matière de revêtement restant dans la conduite de connexion (4A, 4B) est repoussée après chaque changement de couleur de la matière de revêtement.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la matière de revêtement restant dans une première conduite de connexion (4A) est repoussée en direction de la conduite d'alimentation raclée (5A), alors qu'une autre matière de revêtement est transportée à travers une deuxième conduite de connexion (4B), amenée en parallèle à la première conduite de connexion (4A) à travers la construction articulée (2), en direction du dispositif d'application (3).
  6. Machine à enduire multiaxiale à cycles automatiques, en particulier un robot, pour un dispositif d'application (3) pour l'enduction en série de pièces à travailler avec au moins une conduite d'alimentation raclée (5A, 5B) introduite dans un bras (1) de la machine à enduire et avec une conduite de connexion (4A, 4B) menant de la conduite d'alimentation à travers l'espace intérieur d'une construction articulée (2) de la machine à enduire jusqu'au dispositif d'enduction (3),
    caractérisée en ce qu'un système (11, 14) est prévu qui permet de déformer un tuyau flexible (42) de la conduite de connexion (4A, 4B) en mettant sous pression sa périphérie extérieure avec un milieu sous pression, et en ce que la déformation dans la zone entre le dispositif d'application (3) et une station de raclage (6) se trouvant du côté détourné du dispositif d'application de la construction articulée (2), permet de faire sortir la matière de revêtement se trouvant dans la conduite de connexion (4A, 4B) jusque dans la conduite d'alimentation raclée ou de la vider en direction du dispositif d'application.
  7. Machine à enduire selon la revendication 6, caractérisée en ce que la conduite de connexion déformable (4A, 4B) est guidée à travers une articulation de poignet (2), en particulier multiaxiale, de la machine à enduire, articulation sur laquelle est monté le dispositif d'enduction (3), et du côté de l'articulation de poignet (2) détourné du dispositif d'enduction, la conduite est raccordée à proximité de l'articulation à la station de raclage (6), disposée dans un bras (1) de la machine à enduire, de la conduite d'alimentation raclée (5A, 5B).
  8. Machine à enduire selon la revendication 6 ou 7, caractérisée en ce qu'à l'intérieur de la construction articulée (2), un tuyau flexible intérieur (42) de la conduite de connexion (4A, 4B) est entouré de façon coaxiale par une enveloppe (41) en forme de tube ou de tuyau flexible dans laquelle est guidé le milieu sous pression pour vider la conduite de connexion (4A, 4B), dans laquelle le tuyau flexible intérieur (42) et l'enveloppe (41) sont réalisés de telle sorte qu'en cas de mise sous pression, seul le tuyau flexible intérieur (42) cède.
  9. Machine à enduire selon l'une quelconque des revendications 6 à 8, caractérisée en ce que deux conduites de connexion (4A, 4B) pouvant être vidées par leur déformation sont amenées en parallèle entre elles à travers la construction d'articulation (2).
EP05007326A 2004-04-06 2005-04-04 Procédé de transport d'un materiau de revêtement et machine de revêtement Active EP1584376B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004016951A DE102004016951A1 (de) 2004-04-06 2004-04-06 Verfahren zum Fördern eines Beschichtungsmaterials und Beschichtungsmaschine
DE102004016951 2004-04-06

Publications (3)

Publication Number Publication Date
EP1584376A2 EP1584376A2 (fr) 2005-10-12
EP1584376A3 EP1584376A3 (fr) 2007-03-07
EP1584376B1 true EP1584376B1 (fr) 2008-03-12

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ID=34895496

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Application Number Title Priority Date Filing Date
EP05007326A Active EP1584376B1 (fr) 2004-04-06 2005-04-04 Procédé de transport d'un materiau de revêtement et machine de revêtement

Country Status (4)

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EP (1) EP1584376B1 (fr)
AT (1) ATE388766T1 (fr)
DE (2) DE102004016951A1 (fr)
ES (1) ES2302090T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1772194B1 (fr) 2005-10-07 2019-01-09 Dürr Systems AG Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement
DE102006035243A1 (de) * 2006-07-26 2008-01-31 Ludwig Schleicher Gmbh Maschinenbau, Industrie- Und Anlagenbau Einrichtung zum Auftrag eines Auftragsmediums auf einen Gegenstand
DE102009053601A1 (de) * 2009-11-17 2011-05-19 Dürr Systems GmbH Versorgungsschlauch für eine Lackieranlage

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10223498A1 (de) * 2002-05-27 2003-12-11 Duerr Systems Gmbh Verfahren und System zur Farbversorgung einer elektrostatischen Beschichtungsanlage

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4708580A (en) 1985-01-22 1987-11-24 Gmf Robotics Corporation Mechanical wrist mechanism
DE10131562A1 (de) 2001-06-29 2003-01-16 Duerr Systems Gmbh Verfahren und System zur Versorgung einer Beschichtungsvorrichtung
DE10157938A1 (de) 2001-11-27 2003-06-05 Duerr Systems Gmbh Verfahren zur Farbversorgung eines Zerstäubers und Beschichtungsvorrichtung
DE10216581B4 (de) * 2002-04-14 2006-07-20 Asis Gmbh Versorgungsleitung für Beschichtungsanlagen, insbesondere Lackieranlagen
ES2259399T3 (es) 2002-05-07 2006-10-01 Durr Systems Gmbh Procedimiento y sistema de suministro y de aplicacion de pintura.
ATE312670T1 (de) 2002-05-07 2005-12-15 Duerr Systems Gmbh Verfahren und vorrichtung zur lackversorgung einer auftragsvorrichtung sowie zu deren spülung
DE10239516A1 (de) * 2002-08-28 2004-03-18 Dürr Systems GmbH Schlauch für die elektrostatische Beschichtung von Werkstücken
DE10320147A1 (de) 2003-05-06 2004-12-09 Dürr Systems GmbH Verfahren und Versorgungssystem zur dosierten Materialversorgung einer Beschichtungsvorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10223498A1 (de) * 2002-05-27 2003-12-11 Duerr Systems Gmbh Verfahren und System zur Farbversorgung einer elektrostatischen Beschichtungsanlage

Also Published As

Publication number Publication date
EP1584376A2 (fr) 2005-10-12
DE102004016951A1 (de) 2005-11-10
ES2302090T3 (es) 2008-07-01
ATE388766T1 (de) 2008-03-15
EP1584376A3 (fr) 2007-03-07
DE502005003162D1 (de) 2008-04-24

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