EP1666158B1 - Procédé et dispositif de dosage pour l'alimentation en matériau d'un appareil de revêtement. - Google Patents

Procédé et dispositif de dosage pour l'alimentation en matériau d'un appareil de revêtement. Download PDF

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Publication number
EP1666158B1
EP1666158B1 EP05111273A EP05111273A EP1666158B1 EP 1666158 B1 EP1666158 B1 EP 1666158B1 EP 05111273 A EP05111273 A EP 05111273A EP 05111273 A EP05111273 A EP 05111273A EP 1666158 B1 EP1666158 B1 EP 1666158B1
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EP
European Patent Office
Prior art keywords
piston
metering
coating
inlet
area
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EP05111273A
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German (de)
English (en)
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EP1666158A2 (fr
EP1666158A3 (fr
Inventor
Herbert Martin
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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
    • 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
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B05B5/1675—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive the supply means comprising a piston, e.g. a piston pump
    • 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
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
    • B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
    • B05B5/1625—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom
    • B05B5/1633—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom the arrangement comprising several supply lines arranged in parallel, each comprising such an intermediate container

Definitions

  • the invention relates to a method for automatically controlled metered material supply of a coating device for example, the electrostatic serial coating of workpieces and a coating system and a piston dispenser for this purpose according to the preamble of the independent claims.
  • a coating device for example, the electrostatic serial coating of workpieces and a coating system and a piston dispenser for this purpose according to the preamble of the independent claims.
  • it can be the electrostatic serial coating of workpieces such as vehicle bodies with water-based paint or similar conductive coating material of frequently changing color.
  • this intermediate container is designed as a metering cylinder for the metered depending on the particular area to be coated workpiece area supply of the atomizer and for this purpose a z. B. from an electrical Motor via a threaded spindle and a piston rod driven piston contains.
  • the space requirement of the additional metering cylinder is also particularly undesirable if it is to be installed in the atomizer itself, which thereby becomes too bulky for the accessibility of narrow workpiece areas or interior areas, or in the wrist of a painting robot, as in the patent application DE 10 2004 058 054 is described.
  • EP 0 443 276 discloses a device for applying precisely metered quantities of, for example, a thermoplastic adhesive using a double-acting piston pump driven by the material pressure. Dosed here is the total amount of material in a piston stroke.
  • DE 195 24 853 discloses a coating apparatus having a double-acting cylinder vessel whose dual piston arrangement is controlled by compressed air via a four-way pneumatic valve.
  • the cylinder container is not used here for dosing, but as an intermediate container for electrical isolation.
  • an object of the invention is to avoid by filling a dosing cylinder caused time losses with low space requirements.
  • the invention is based on the finding that a similar to the usual A / B-operation material supply the coating device can be realized without interruption by the refilling with a single metering cylinder with two achs Diseaseen areas, if not as previously only an input and an output, but provides two inputs for connection to the color change valve assembly or other source of material and two exits to the nebulizer or other coating device (where the terms "input” and "output” do not signify the material flow limit to a single flow direction, since material z. B. through the outputs and back into the metering cylinder and / or from the metering cylinder through the inputs back to the material source can be promoted).
  • the piston in each of its two opposite movements can promote material to the atomizer, and thus allows an alternate operation of its cylinder areas (A / B operation).
  • a / B operation During a change of material, for example during color change, during the delivery of the first material from one area of the metering cylinder, its other area can be filled with the second material different from the first material.
  • a single dosing drive is sufficient for the piston arrangement of the dosing cylinder, so that not only the space requirement but also the drive effort is halved in comparison with the known A / B systems.
  • the invention has significant further advantages. These include u. a. short color change times and good rinsability during color change. Further, because of the possibility of continuous or quasi-continuous supply of the atomizer, the filling of the metering cylinder with low flow rates possible while the container size has been selected so that the material content is sufficient for the painting of a workpiece or workpiece area and the maximum amount of paint required for different workpieces is fillable. As a result, the space requirement can be further reduced in the invention.
  • the potential separation between the high-voltage nebulizer and the usually grounded color changer required in the electrostatic coating with conductive material is achieved in the piston dispenser described above, especially by an insulating or insulating within the metering cylinder and otherwise in a known manner z. B. by emptying the connecting line between the color changer and the area of the dosing, then from the atomizer is supplied.
  • emptying lines for electrical isolation in particular the pigging technique known for this purpose from the prior art mentioned above can be used.
  • the piston dispenser can also be used for the coating operation without high voltage and / or for non-conductive coating material such as, for example, diluted with conventional solvents paints, no electrical isolation is required.
  • the atomizer may be, for example, a rotary atomizer or air atomizer and work electrostatically or without high voltage.
  • the color changer is grounded in electrostatic coating systems.
  • the piston dispenser 10 consists essentially of the metering cylinder 11 with a displaceable in the metering piston assembly 12, which is formed in the embodiment considered here by two firmly together and with a piston rod 13 connected piston elements 14 and 15 respectively.
  • the metering cylinder 11 can in a conventional manner ( EP 1 384 885 ) consist of ceramic and, for example, have a circular or oval cross-section.
  • the two piston elements 14 and 15 have a shape corresponding to this cross-section and abut on its circumference with sealing lips on the inner walls of the metering cylinder 11.
  • a metering drive 16 arranged outside the metering cylinder is provided which, for example, may consist of an electric stepping motor M controlled by the program control of the coating system with associated gear and a threaded spindle 17. Instead, other known for the purpose under consideration drive mechanisms may be provided.
  • the nebulizer serving as a coating device thereby be supplied with varying amounts of material during the coating and during a piston stroke.
  • the invention is in the between the two piston elements 14 and 15 released, sealed by the sealing lips to the outside gap 18 is a preferably liquid and preferably paint compatible insulating.
  • the volume of the insulating medium is so great that between the formed on both sides of the piston assembly 12 areas 1 and 2 of the metering cylinder 11, one of which may contain a high voltage on the order of 100 kV coating material and the other placed on ground coating material , the required electrical insulation is ensured.
  • the desired Hochnapssisolierumble could also be formed by air or other insulating gas.
  • Each of the two areas 1 and 2 is connected via an input 1a or 2a and a connected input line L1a or L2a with the color changer and via one output 1b and 2b and a connected output line L1b and L2b with the atomizer.
  • the inlet 1a and the outlet 1b are located at the one end of the dosing cylinder 11 or in its vicinity, while the inputs and outputs 2a and 2b may be located at the opposite end of the metering cylinder or in the vicinity thereof.
  • the inputs and outputs can be arranged, for example, in the cylindrical side wall or in the end walls of the metering cylinder and can be opened and closed by program-controlled valves (not shown).
  • the input lines L1a and L2a and / or the output lines L1b and L2b at least partially save space as preferably gemoldchte Form tube or pipe spiral, wherein the turns of each two lines interleaved and / or can be wound in at least two layers. If they are made of insulating material, these spirals, with electrostatic coating, allow for the necessary electrical isolation between the atomizer and the grounded supply system in the least possible space.
  • the high voltage is turned off. It can also remain switched on if not only the lines L1a and L2a, but also the emptied lines L1b and L2b form insulating sections.
  • the described mode of operation may change in other cases. For example, if no color change occurs, the coating system need not be rinsed, and if the high voltage is turned off after a painting operation and remains off until the input lines are emptied (or until other isolation lines are formed), the coating material remaining in the output lines need not be removed but it can then be pressed and sprayed at the next painting of the new color to the atomizer.
  • Using a high-voltage nebulizer eliminates the need to provide isolation by draining lines.
  • the required in the electrostatic coating Isolierumblen in the input and output lines can be formed in other ways than by their emptying.
  • the coating system after Fig. 2 corresponds to the one after Fig. 1 with the exception of the piston dispenser 20, which differs from the piston dispenser 10 with respect to the piston assembly 22 and the metering drive 26.
  • the piston assembly 22nd is formed in this embodiment by two piston elements 24 and 25, which can be moved both together and relative to each other displaceable in each case in both directions in the metering cylinder 21 and for this purpose on each of its own piston rod 23 and 23 'are fixed.
  • Each piston element 24 and 25 has its own program-controlled motor M or M ', the corresponding piston rod z. B. similar as according to Fig. 1 can drive.
  • a preferably liquid insulating medium 28 the volume of which should change but here with each displacement of the piston elements relative to each other.
  • the insulating medium 28 may be periodically or continuously directed into or through the varying gap between the piston elements 24 and 25 under the control of a separate metering device (not shown) which compresses or disassembles the piston elements and its volume corresponding to that Increase and reduce piston movements.
  • the filling volume of the regions 1 and 2 of the metering cylinder can also be adjusted, for example, as a function of the workpiece or workpiece area to be coated, wherein also in the area 2 (unlike in FIG Fig. 1 ) the reduction of the filling volume in the region 1 by the volume of the piston rods 23, 23 'can be compensated.
  • the two piston rods 23 and 23 are space-saving, the two piston rods 23 and 23 'slidably mounted and out at the same end face of the metering cylinder out of this. If space is available axially on the opposite end, The two piston rods can also extend in opposite directions.
  • the procedure of the coating system according to Fig. 2 can be largely the too Fig. 1 correspond described operation, but arise through the different piston control important additional opportunities.
  • Particularly advantageous is the ability during the supply of the atomizer from the one area 1 or 2 with one piston element by independent movement of the other piston element accelerates the other area accelerated and to use the time gained thereby to before emptying the supplying area to empty the input line of the other area.
  • the promotion of the coating material from the second area to the atomizer can be started immediately, so that continuous coating operation is possible and therefor unlimited paint volume is available.
  • the embodiment according to Fig. 2 can be according to the location of at least two of the four input and output lines according to Fig. 3 modify. Again, two are each driven by a metering motor and provided in each direction and relatively movable piston elements 34 and 35 are provided.
  • the inlet 2a and the outlet 2b can be located at a middle axial position of the metering cylinder 31 as shown, while the inputs and outputs 1a and 1b of the other portion of the metering cylinder either at the corresponding front end or instead, as indicated by the input la 'and the output 1b' can also be located at a central axial position of the metering cylinder 31. In both cases, the same operation as in the embodiment to Fig.
  • the insulating member 38 may include an insulating liquid and be arranged stationary, but also an externally controlled variable volume arrangement of the insulating is conceivable.
  • the one of the two piston rods 33 and 33 'could also be passed under sealing by the insulating member 38 and then extend in the same direction as the other piston rod.

Claims (19)

  1. Procédé pour l'alimentation dosée, à commande automatique, en un matériau d'un dispositif de revêtement (Z) pour le revêtement en série, en particulier électrostatique, de pièces, dans lequel
    un vérin de dosage (11, 21) contenant un système de pistons (12, 22) est rempli à partir d'une source de matériau (FW) via un système de conduites d'admission (L1a, L2a),
    et le matériau de revêtement est transporté par le système de pistons (12, 22), actionné par au moins un système d'entraînement (16, 26), hors du vérin de dosage (11, 21) via un système de conduites de sortie (L1b, L2b) vers le dispositif de revêtement (Z),
    la quantité de matériau acheminée vers le dispositif de revêtement (Z) pendant le processus de revêtement et pendant une course du piston du vérin de dosage (11, 21) peut être variée automatiquement en fonction de la zone à revêtir dans chaque cas sur la pièce, par exemple en fonction de la dimension et de la forme des surfaces à revêtir, de la forme du jet de pulvérisation,
    caractérisé en ce que dans le vérin de dosage (11, 21) sont formées deux zones (1, 2) qui sont reliées de manière commandée par respectivement une entrée (1a, 2a) avec le système de conduites d'admission (L1a, L2a) et par respectivement une sortie (1b, 2b) avec le système de conduites de sortie (L1b, L2b),
    et en ce que le matériau de revêtement est transporté vers le dispositif de revêtement (Z) en alternance à partir de respectivement une des deux zones (1, 2) via la sortie (1b, 2b) de celle-ci, pendant que, simultanément, l'autre zone est remplie via son entrée (1a, 2a).
  2. Procédé selon la revendication 1, caractérisé en ce que, en cas de changement de matériau, pendant le transport d'un premier matériau de revêtement hors d'une zone du vérin de dosage (11, 21), l'autre zone de ce dernier est remplie avec un deuxième matériau de revêtement, différent du premier matériau de revêtement.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, après le remplissage d'une zone (1, 2), la conduite d'admission (L1a, L2a), raccordée à l'entrée (1a, 2a) de ladite zone est vidée avant que le matériau de revêtement soit transporté à partir de cette zone (1, 2) vers le dispositif de revêtement (Z), et/ou après le transport du matériau de revêtement hors d'une zone (1, 2), la conduite de sortie (21b, 22b), raccordée à la sortie (1b, 2b) de ladite zone, est vidée avant que le matériau de revêtement soit transporté à partir de la source de matériau (FW) vers ladite zone.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de pistons (22) comporte deux pistons (24, 25), mobiles l'un par rapport à l'autre et actionnés chacun par un système d'entraînement, et en ce que, après le remplissage de l'une des zones (1, 2), la conduite d'admission (L1a, L2a), raccordée à l'entrée (1a, 2a) de ladite zone, est vidée, pendant que, simultanément, le matériau de revêtement est encore transporté hors de l'autre zone vers le dispositif de revêtement (Z).
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de pistons (22) comporte deux pistons (24, 25), mobiles l'un par rapport à l'autre et séparés par une chambre intermédiaire, vers laquelle est guidé un fluide isolant (28) selon un volume de remplissage commandé.
  6. Procédé selon la revendication 5, caractérisé en ce que le volume de remplissage de la chambre intermédiaire varie pendant les mouvements du système de pistons (22).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le système d'entraînement (16, 26) comporte un moteur d'entraînement (M), par lequel le système de pistons (12, 22) est actionné pour remplir et vider les deux zones (1, 2) du vérin de dosage (11, 21).
  8. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le système d'entraînement (26) comporte deux moteurs d'entraînement (M, M') à commande séparée, qui actionnent respectivement l'un des deux pistons (24, 25) formant le système de pistons (22).
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la source de matériau est un système à vanne (FW) pour le changement de matériau, destiné à alimenter le dispositif de revêtement (Z) avec un matériau de revêtement différent, lequel remplit une zone (1, 2) du vérin de dosage (11, 21) avec un premier matériau, pendant que, simultanément, un autre matériau, différent du premier matériau, est acheminé hors de l'autre zone vers le dispositif de revêtement (Z).
  10. Dispositif de dosage à piston pour l'alimentation dosée d'un dispositif de revêtement (Z)
    comportant un vérin de dosage (11, 21), qui possède des entrées et sorties (1a, 2a, 1b, 2b) pour le raccordement, à commande automatique, à des conduites d'admission et des conduites de sortie (L1a, L2a, L1b, L2b),
    comportant un système de pistons (12, 22) mobile dans le vérin de dosage (11, 21),
    et comportant au moins un élément d'entraînement (13, 23), par lequel le système de pistons (12, 22) est relié à un système d'entraînement (16, 26) à commande automatique du dispositif de dosage à piston, et par lequel la quantité de matériau acheminée vers le dispositif de revêtement (Z) peut être variée automatiquement pendant le processus de revêtement et pendant une course du piston du vérin de dosage (11, 21),
    caractérisé en ce que le vérin de dosage (11, 21) comporte deux entrées (1a, 2a) et deux sorties (1b, 2b), par lesquelles il est raccordé ou peut être raccordé de manière commandée aux conduites d'admission et conduites de sortie (L1a, L2a, L1b, L2b), et une entrée (1a) et une sortie (1b) sont situées sur une position axiale du vérin de dosage (11, 21), qui est située à distance axiale de l'autre entrée (2a) et de l'autre sortie (2b).
  11. Dispositif de dosage à piston selon la revendication 10, caractérisé en ce que l'une des entrées et sorties (1a, 1b) se situent au niveau de l'une des extrémités frontales du vérin de dosage (11, 21) ou à proximité de celui-ci, et les autres entrée et sortie (2a, 2b) se situent au niveau des extrémités frontales opposées du vérin de dosage ou à proximité de celui-ci.
  12. Dispositif de dosage à piston selon la revendication 10, caractérisé en ce que les entrées et sorties (2a', 2b') se situent au niveau d'un emplacement intermédiaire du vérin de dosage (31) entre les extrémités frontales de celui-ci et les autres entrées et sorties (1a, 1a', 2a, 2a') se situent également au niveau d'un emplacement intermédiaire ou au niveau d'une extrémité frontale du vérin de dosage ou à proximité de celui-ci.
  13. Dispositif de dosage à piston selon l'une quelconque des revendications 10 à 12, caractérisé en ce que le système de pistons (12, 22) est formé par deux pistons (14, 15, 24, 25), entre lesquels est prévu ou peut être introduit un élément isolant ou un fluide isolant (18, 28, 38), par lequel le matériau de revêtement situé sur un côté au potentiel de haute tension peut être isolé contre le matériau de revêtement situé sur l'autre côté à un faible potentiel ou au potentiel de la terre.
  14. Dispositif de dosage à piston selon la revendication 13, caractérisé en ce que les deux pistons (14, 15) sont reliés fermement l'un à l'autre et à une tige de piston (13) commune formant l'élément d'entraînement.
  15. Dispositif de dosage à piston selon la revendication 13, caractérisé en ce que les deux pistons (24, 25) sont mobiles l'un par rapport à l'autre et sont reliés chacun à respectivement un système d'entraînement (M, M') par l'intermédiaire d'une tige de pistons (23, 23').
  16. Dispositif de dosage à piston selon la revendication 15, caractérisé en ce que dans la chambre intermédiaire entre les deux pistons (24, 25) peut être introduit un fluide isolant (28) selon un volume de remplissage apte à être commandé, et en ce que la distance entre les pistons (24, 25) peut être variée avec le volume de remplissage.
  17. Dispositif de dosage à piston selon la revendication 15 ou 16, caractérisé en ce que les deux tiges de pistons (23, 23') sont logées de manière mobile l'une dans l'autre et sont guidée hors du vérin de dosage (21) au niveau de la même face frontale de celui-ci.
  18. Dispositif de dosage à piston selon l'une quelconque des revendications 10 à 17, caractérisé en que le système d'entraînement (16, 26) pour l'alimentation dosée du dispositif de revêtement (Z) est commandé en fonction de la zone à revêtir dans chaque cas sur la pièce.
  19. Système de revêtement pour le revêtement en série, en particulier électrostatique, de pièces, avec un dispositif de dosage à pistons (10, 20) selon l'une quelconque des revendications 10 à 18, comportant
    un système à vanne (FW) pour le changement de couleur, raccordé aux deux entrées (1a, 2a) du vérin de dosage (11, 21),
    un dispositif de revêtement (Z) raccordé aux deux sorties (1b, 2b) du vérin de dosage (11, 21),
    et un système d'entraînement (16, 26), qui est relié au système de pistons (12, 22) et par lequel le matériau de revêtement, au moment de l'application par le dispositif de revêtement (Z), peut être dosé en fonction de la zone à revêtir dans chaque cas sur la pièce.
EP05111273A 2004-12-01 2005-11-24 Procédé et dispositif de dosage pour l'alimentation en matériau d'un appareil de revêtement. Active EP1666158B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004058053A DE102004058053B4 (de) 2004-12-01 2004-12-01 Verfahren und Kolbendosierer zur dosierten Materialversorgung einer Beschichtungsvorrichtung

Publications (3)

Publication Number Publication Date
EP1666158A2 EP1666158A2 (fr) 2006-06-07
EP1666158A3 EP1666158A3 (fr) 2008-08-13
EP1666158B1 true EP1666158B1 (fr) 2009-11-18

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EP (1) EP1666158B1 (fr)
AT (1) ATE448880T1 (fr)
DE (2) DE102004058053B4 (fr)
ES (1) ES2336576T3 (fr)

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CN101588875B (zh) * 2006-12-12 2014-08-06 杜尔系统有限责任公司 包括计量装置的涂漆设备
RU2649445C2 (ru) * 2013-02-18 2018-04-03 Дюрр Системз Гмбх Насос для покрывающего средства и способ очистки насоса для покрывающего средства

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US8418647B2 (en) 2005-10-21 2013-04-16 Dürr Systems Inc. Procedure and piston type metering devices for the metered material supply for a coating device
RU2427432C2 (ru) 2006-12-12 2011-08-27 Дюрр Системз Гмбх Устройство для нанесения покрытий с дозировочным устройством
DE102007029195A1 (de) 2007-06-25 2009-02-19 Dürr Systems GmbH Beschichtungseinrichtung mit einer Dosiervorrichtung
DE102009031463A1 (de) 2009-07-01 2011-01-05 Eisenmann Anlagenbau Gmbh & Co. Kg Kolbendosierer für fluide Medien und System zum Beschichten von Gegenständen
DE102011012012A1 (de) 2011-02-22 2012-08-23 Eisenmann Ag Kolbendosierer für fluide Medien
DE102016001544A1 (de) 2016-02-10 2017-08-10 Eisenmann Se Isolationseinrichtung sowie Beschichtungssystem hiermit
CN113280263B (zh) * 2021-02-08 2022-11-25 深圳市赛力自动化仪表有限公司 可调流量的计量式连续输送装置

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ES2259399T3 (es) * 2002-05-07 2006-10-01 Durr Systems Gmbh Procedimiento y sistema de suministro y de aplicacion de pintura.
DE10233633B4 (de) * 2002-07-24 2005-09-01 Dürr Systems GmbH Vorrichtung zum Dosieren oder Fördern eines auf Hochspannungspotential aufgeladenen Beschichtungsmittels in einer Beschichtungsanlage
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CN101588875B (zh) * 2006-12-12 2014-08-06 杜尔系统有限责任公司 包括计量装置的涂漆设备
RU2649445C2 (ru) * 2013-02-18 2018-04-03 Дюрр Системз Гмбх Насос для покрывающего средства и способ очистки насоса для покрывающего средства

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DE102004058053A1 (de) 2006-06-14
ES2336576T3 (es) 2010-04-14
EP1666158A2 (fr) 2006-06-07
ATE448880T1 (de) 2009-12-15
DE502005008525D1 (de) 2009-12-31
DE102004058053B4 (de) 2006-12-28
EP1666158A3 (fr) 2008-08-13

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