EP3017873B1 - Systeme de revetement d'objets - Google Patents

Systeme de revetement d'objets Download PDF

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Publication number
EP3017873B1
EP3017873B1 EP15003164.9A EP15003164A EP3017873B1 EP 3017873 B1 EP3017873 B1 EP 3017873B1 EP 15003164 A EP15003164 A EP 15003164A EP 3017873 B1 EP3017873 B1 EP 3017873B1
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EP
European Patent Office
Prior art keywords
insulation
drive
line
coating system
space
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
EP15003164.9A
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German (de)
English (en)
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EP3017873A1 (fr
Inventor
Ralph Meier
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.)
Eisenmann SE
Original Assignee
Eisenmann SE
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Publication of EP3017873A1 publication Critical patent/EP3017873A1/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
    • 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
    • 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
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
    • B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell

Definitions

  • an application device can, for example, be a high-speed rotary atomizer, in which the dispensing device comprises a rotating bell plate from which the smallest paint droplets are thrown off, so that a paint mist is formed.
  • an input valve device is a so-called color changer, which is fed in a manner known per se from ring lines with different media. If an object is to be painted with a different color than the previously coated object, a Color change can be carried out. So that a color change can take place as quickly as possible and without loss of time, a coating system of the type mentioned at the outset often comprises two supply lines so that alternating operation can take place. In practice, this means that the application device is fed with a first coating material from one supply line, while the other supply line is prepared using a different coating material, so that a color change can be carried out in a short time.
  • the lines in the direction away from the application device must build up an insulation path during the coating process and, for this purpose, must be clean and dry at least over a sufficiently long section.
  • the lines are accordingly made of an electrically insulating material.
  • the isolation path is consequently constructed with at least mechanical support. It was recognized that this is more effective and faster compared to cleaning and drying a pipe with only fluid media. During its isolation movement, the clearing body is not driven by a fluid medium, but moved mechanically. This guarantees a clearly defined position of the clearing body.
  • the insulation channel comprises a parking space for the clearing body, a line section of the inlet line extending radially from the insulation channel, which connects the insulation channel to the reservoir, in front of the parking space when viewed in the direction of the storage container.
  • a line section thus remains between the insulation channel and the storage container, which section can also be filled with conductive material even when the insulation path is built up, without this having a negative impact on operational safety.
  • the drive element of the drive device is a push element which is connected to a push shaft or a push rod.
  • a push shaft can be bent flexibly.
  • the thrust element increases in particular the contact surface on the clearing body when it is pushed.
  • the drive element of the drive device can be a push shaft or a push rod which is connected to the clearing body in a fixed manner.
  • the push shaft or the push rod is guided through a through opening in an end wall of the parking space into a drive space which is arranged next to the parking space, where the push shaft or the push rod is coupled to a drive unit.
  • the drive unit is a winding device, by means of which the thrust shaft can be unwound from the drive space into the isolation channel and wound out of the isolation channel into the drive space.
  • the drive unit is a cylinder device in which the drive space forms a cylinder space and through which the push rod can be moved into or out of the isolation channel.
  • the push rod can also be moved via an electrically operated linear unit.
  • the insulation duct, the drive space and the drive unit are preferably accommodated in an insulation housing.
  • the components can optionally be used as Assembly can be inserted into a line, in which case the necessary connection options are available.
  • To clean the inlet line it comprises a pig line which extends between a starting pig station and a target pig station.
  • the isolation section is established as close as possible to the storage tank. It is therefore advantageous if the inlet line defines a connecting section which connects the target pig station and the storage container, the isolation channel being a section of the connecting section.
  • the inlet valve device is preferably a color changer.
  • FIG. 10 denotes overall a coating system for coating objects, for example vehicle bodies or their add-on parts, which are not specifically shown.
  • the coating system 10 comprises an electrostatically operating application device 12, shown only schematically, which in the present exemplary embodiment is a high-speed rotary atomizer 14 with a rotating bell cup 16.
  • the application device 12 comprises a delivery line 18, via which coating material can be delivered onto an object.
  • the delivery line 18 leads to the bell plate 16 of the high-speed rotary atomizer 14.
  • the bell plate 16 and the delivery line 18 thus form a delivery device.
  • the application device 12 can optionally be supplied with material from two supply lines 20, the first supply line being denoted by 20.1 and the second supply line by 20.2 in the figures.
  • the second supply line 20.2 is only indicated and not shown in detail.
  • the first and second supply lines 20.1 and 20.2 are structurally identical in the present exemplary embodiment.
  • the two supply lines 20 each extend between an inlet valve device 22 and an outlet valve device 24.
  • the inlet valve device 22 is a color changer known per se 26 formed, which can be fed from ring lines 28 with different media.
  • the inlet valve device 22 is connected to a working line 30.
  • a working fluid such as compressed air or a flushing agent can be fed to the inlet valve device 22 via the working line 30.
  • the working line 30 can serve as a so-called dump in order to lead material out of the system.
  • the working line 30 is in turn connected in a manner known per se to a valve device, not specifically shown, which can connect the working line 30 to a compressed air source, a flushing agent source and an outlet. If further lines are referred to below as working lines, these fulfill the same purpose and are connected to a corresponding valve device and material sources as well as an outlet.
  • each of the supply lines 20 can be connected to a separate inlet valve device 22.
  • Each supply line 20 comprises a storage container 32 in the form of a piston dispenser 34, from which the application device 12 can be fed via a supply line 36.
  • the piston dispenser 34 illustrates only one example of a storage container 32 for coating material.
  • the delivery line 18 is connected to the output valve device 24, into which the respective supply line 36 of each supply line 20 also opens.
  • the Output valve device 24 is also connected to a working line 38 for compressed air / flushing agent / dump.
  • the piston dispenser 34 comprises a cylinder 40 in which a piston 42 can be moved with the aid of a piston drive, not specifically shown.
  • the piston 42 delimits a working space 44 which is connected to the supply line 36 via a metering valve unit 46.
  • the working space 44 is connected to an inlet line 48 via the metering valve unit 46.
  • a working line 50 for compressed air / flushing agent / dump opens into the metering valve unit 46.
  • the inlet line 48 extends between the color changer 26 and the piston metering device 34 and comprises, as a piggable line section, a pig line 52 which extends between a first pig station 54 and a second pig station 56.
  • the first pig station 54 will hereinafter be referred to as the starting pig station and the second pig station 56 as the target pig station.
  • the starting pig station 54 and the target pig station 56 are connected in a manner known per se, each with a working line 54a and 56a for compressed air / flushing agent / dump.
  • the inlet line 48 defines a connecting section 58 which connects the target pig station 56 and the storage container 32, in the present exemplary embodiment its metering valve unit 4, to one another.
  • a mechanical insulation device 60 is provided, which in the present exemplary embodiment is in the connecting section 58 is integrated.
  • the insulation device 60 defines a section of the inlet line 48, in the present exemplary embodiment a section of the connecting section 58, as an insulation channel 62 with an inner jacket surface 62a.
  • the isolation device 60 comprises a clearing body 64 which can be moved in the isolation channel 62 and is complementary to the inner cross section of the isolation channel 62.
  • the isolation channel 62 is connected via a first end region 66a to a line section 58a of the connecting section 58, which leads to the pig station 56.
  • the insulation channel 62 is designed as a parking space 68 for the clearing body 64, which ends in an end wall 70.
  • a short line section 58b of the connecting section 58 extends radially from the isolation channel 62, which leads to the metering valve unit 46.
  • the line section 58 is a line section of the inlet line 48, which connects the insulation channel 62 to the storage container 32.
  • the clearing body 64 can be moved in the isolation channel 62 between a parking position and an isolation position.
  • the parking position to be recognized the clearing body 64 is located in the parking space 68, so that material can flow unhindered through the connecting section 58.
  • the clearing body 64 In the in Figure 2 In the isolation position to be recognized, the clearing body 64 is located in the first end region 66a and the isolation device 60 is located in an isolation configuration.
  • the isolation device comprises 60, a mechanical drive device 72.
  • This has a push element 74 as a drive element, which is arranged in the insulation channel 62 between the end wall 70 and the clearing body 64.
  • the thrust element 74 is connected to a thrust shaft 76, which is guided through a complementary through opening 78 in the end wall 70 into a drive space 80 which is arranged next to the parking space 68.
  • the thrust shaft 76 is coupled to a drive unit 82, which can be, for example, an electric motor or a pneumatic or hydraulic drive.
  • the drive unit 82 forms a winding device 84, through which the thrust shaft 76 can be unwound from the drive space 80 into the isolation channel 62 and wound out of the isolation channel 62 into the drive space 80, for which purpose the thrust shaft 76 is designed to be flexible in a suitable manner.
  • the thrust shaft 76 is so rigid in the axial direction that it can generate the required pressure on the clearing body 64.
  • the insulation channel 62 and the drive space 80 with the drive unit 82 are accommodated in an insulation housing 86.
  • the coating system 10 with the insulation device 60 now functions as follows, the operation being explained only using the example of the first supply line 20.1: Starting from an initial configuration in which all lines and channels are free of material and cleaned, the piston dispenser 34 is first filled with a selected paint from a specific ring line 28. The thrust shaft 76 is wound up in the drive space 80 in such a way that the thrust element 74 is located next to the end wall 70 of the parking space 68.
  • the paint From the color changer 26, the paint first reaches the starting pig station 54, where a pig, not specifically shown, is introduced into the pig line 52 in front of the paint volume, which is then pushed by the paint to the target pig station 56. The paint then flows through the connecting section 58 and the metering valve unit 46 into the piston metering unit 34.
  • the clearing body 64 of the isolation device 60 is in its parking position in the parking space 68. If the clearing body 64 is initially outside the parking space 68 in the isolation channel 62, it is pushed into its parking position by the paint.
  • the paint feed from the color changer 26 is ended.
  • the target pig station 56 and the metering valve unit 46 are switched to a configuration in which the working lines 50 and 56a, respectively, are connected to the connecting section 58.
  • the connecting section 58 is now rinsed in that rinsing agent is pressed through the working line 50 of the metering valve unit 46 to the pig station 56 and out of its working line 56a.
  • the clearing body 64 is pushed out of its parked position into its isolation position, in that the thrust shaft 76 is unwound into the isolation channel 62. During this isolation movement, the clearing body 64 frees the inner jacket surface 62a of the isolation channel 62 from any material still adhering to it.
  • Figure 2 shows the situation when the clearing body 64 has reached its isolation position.
  • the section of the isolation channel 62 freed from material then forms an electrical isolation path 88 between the piston dispenser 34 and the target pig station 56.
  • the isolation path 88 is then formed between the storage container 32 and the inlet valve device 22.
  • a previous flushing process can also be dispensed with and the clearing body 64 can perform its insulating movement against the paint located in the insulating channel 62.
  • a sufficient isolation distance usually has a minimum length of about 300 mm. It goes without saying that all components involved must be made of electrically insulating material, for which plastics in particular come into question.
  • the clearing body 64 can be moved precisely and by a defined distance regardless of the material in the insulation channel 62.
  • Position sensors for the clearing body 64 can be provided for monitoring the distance covered. In principle, however, its isolation movement can be tracked via the drive unit 82, since the movement path of the thrust shaft 76 can be monitored simply and in a manner known per se.
  • the path actually covered by the pig can deviate from the path required to build up the isolation path, as this is influenced by different viscosities for different materials in the line and by dimensional tolerances.
  • Paint can now be pressed from the piston dispenser 34 via the supply line 36 to the output valve device 24 and into the delivery line 18, so that the paint can be applied by the application device 12 to an object not specifically shown. In the case of the high-speed rotary atomizer, this is at high voltage potential. An electrical flashover to the electrically conductive materials in the first supply line 20.1 is prevented by the insulation path 88.
  • a color change is prepared in a manner known per se.
  • the piston dispenser present in the second supply line is filled in a corresponding manner and a corresponding insulation path is built up.
  • FIGS. 3 and 4th show a coating system 10 with an insulation device 60 which has a modified drive unit 82.
  • a cylinder device 90 is provided in which the push element 74 is connected to a push rod 92 which carries a piston 94 at the other end, as is known per se.
  • the piston 94 runs in the drive space 80, which here forms the cylinder space.
  • the push element 74 can also only be defined by the free end of the push shaft 76 or the push rod 92.
  • the clearing body 64 can also be coupled in a fixed manner to the push shaft 76 or the push rod 92 so that the clearing body 64 follows the movements of the push shaft 76 or the push rod 92 in both directions.
  • the push shaft 76 or the push rod 92 forms the drive element.

Landscapes

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

Claims (10)

  1. Système de revêtement conçu pour revêtir des objets, comprenant
    a) un dispositif applicateur (12) à fonctionnement électrostatique, muni d'un appareil délivreur (16, 18) au moyen duquel un matériau de revêtement peut être dispensé ;
    b) au moins un récipient de stockage (32) dédié à du matériau de revêtement, relié à un appareil distributeur d'entrée (22) par l'intermédiaire d'un conduit d'admission (48), et à l'appareil délivreur (16, 18) par l'intermédiaire d'un conduit d'alimentation (36) ;
    sachant
    c) qu'il est prévu un appareil d'isolation (60) qui
    ca) définit un tronçon du conduit d'admission (48) en tant que canal d'isolation (62) ;
    cb) inclut un corps d'évacuation (64) ;
    cc) inclut un appareil d'entraînement mécanique (72), muni d'un élément d'entraînement au moyen duquel ledit corps d'évacuation (64) peut être mû, dans ledit canal d'isolation (62), vers un emplacement d'isolation à partir d'au moins un emplacement de repos, sachant que, lors de ce mouvement d'isolation, ledit corps d'évacuation (64) élimine du matériau de la surface d'enveloppe intérieure (62a) dudit canal d'isolation (62), permettant ainsi la formation d'un trajet d'isolation électrique (88) entre le récipient de stockage (32) et l'appareil distributeur d'entrée (22),
    caractérisé par le fait que
    d) le conduit d'admission (48) inclut un conduit d'écouvillonnage (52) s'étendant entre un poste d'écouvillonnage (54) de départ et un poste d'écouvillonnage (56) d'arrivée ;
    e) ledit conduit d'écouvillonnage (52) est situé en amont de l'appareil d'isolation (60).
  2. Système de revêtement selon la revendication 1, caractérisé par le fait que le canal d'isolation (62) comporte un espace de repos (68) affecté au corps d'évacuation (64), sachant qu'un segment (58b) du conduit d'admission (48), reliant ledit canal d'isolation (62) au récipient de stockage (32), part radialement dudit canal d'isolation (62) devant ledit espace de repos (68) en considérant dans la direction dudit récipient de stockage (32).
  3. Système de revêtement selon la revendication 2, caractérisé par le fait que l'élément d'entraînement de l'appareil d'entraînement (72) est un élément de poussée (74) relié à un arbre de poussée (76) ou à une tige de poussée (92).
  4. Système de revêtement selon la revendication 2, caractérisé par le fait que l'élément d'entraînement de l'appareil d'entraînement (72) est un arbre de poussée (76) ou une tige de poussée (92) en liaison motrice rigide avec le corps d'évacuation (64).
  5. Système de revêtement selon la revendication 3 ou 4, caractérisé par le fait que l'arbre de poussée (76) ou la tige de poussée (92) est guidé(e), en traversant un orifice de passage (78) pratiqué dans une paroi extrême (70) de l'espace de repos (68), pour pénétrer dans un espace d'entraînement (80) qui jouxte ledit espace de repos (68) et dans lequel ledit arbre de poussée (76), ou ladite tige de poussée (92), est couplé(e) à une unité d'entraînement (82).
  6. Système de revêtement selon la revendication 5, caractérisé par le fait que, l'arbre de poussée (76) étant prévu, l'unité d'entraînement (82) est un appareil enrouleur (84) par l'intermédiaire duquel ledit arbre de poussée (76) peut être déroulé pour pénétrer dans le canal d'isolation (62), à partir de l'espace d'entraînement (80), et enroulé pour gagner ledit espace d'entraînement (80) en quittant ledit canal d'isolation (62).
  7. Système de revêtement selon la revendication 5, caractérisé par le fait que, la tige de poussée (92) étant prévue, l'unité d'entraînement (82) est un vérin (90) dans lequel l'espace d'entraînement (80) forme une chambre cylindrique, et par l'intermédiaire duquel ladite tige de poussée (92) peut être mue afin de pénétrer dans le canal d'isolation (62) ou de sortir dudit canal d'isolation (62), ou bien ladite unité d'entraînement (82) est une unité linéaire agissant électriquement.
  8. Système de revêtement selon l'une des revendications 5 à 7, caractérisé par le fait que le canal d'isolation (62), l'espace d'entraînement (80) et l'unité d'entraînement (82) sont intégrés dans un boîtier d'isolation (86).
  9. Système de revêtement selon l'une des revendications 1 à 8, caractérisé par le fait que le conduit d'admission (48) définit une zone de jonction (58) reliant le poste d'écouvillonnage d'arrivée (56) et le récipient de stockage (32), le canal d'isolation (62) étant un tronçon de ladite zone de jonction (58).
  10. Système de revêtement selon l'une des revendications 1 à 9, caractérisé par le fait que l'appareil distributeur d'entrée (22) est un changeur de couleurs (26).
EP15003164.9A 2014-11-08 2015-11-04 Systeme de revetement d'objets Active EP3017873B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014016552.3A DE102014016552A1 (de) 2014-11-08 2014-11-08 Beschichtungssystem zum Beschichten von Gegenständen

Publications (2)

Publication Number Publication Date
EP3017873A1 EP3017873A1 (fr) 2016-05-11
EP3017873B1 true EP3017873B1 (fr) 2021-04-07

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ID=54557198

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EP15003164.9A Active EP3017873B1 (fr) 2014-11-08 2015-11-04 Systeme de revetement d'objets

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EP (1) EP3017873B1 (fr)
DE (1) DE102014016552A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003095106A2 (fr) * 2002-05-07 2003-11-20 Behr Systems, Inc. Systeme de distribution de peinture et d'application et procede
DE102004056789A1 (de) * 2004-11-24 2006-06-01 Eisenmann Maschinenbau Gmbh & Co. Kg Elektrische Trenneinheit für eine Fluid-Förderleitung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2646106B1 (fr) * 1989-04-19 1991-07-19 Sames Sa Installation de projection par voie electrostatique d'un produit liquide conducteur et dispositif d'isolation pour un circuit de distribution d'un produit liquide conducteur
DE19961270A1 (de) * 1999-12-18 2001-07-05 Inlac Ind Lackieranlagen Gmbh Lackieranlage
JP3803034B2 (ja) * 2000-03-15 2006-08-02 株式会社大気社 塗装装置
DE10157966A1 (de) * 2001-11-27 2003-06-05 Duerr Systems Gmbh Verfahren und Versorgungssystem zur dosierten Materialversorgung einer Beschichtungsvorrichtung
JP2004344788A (ja) * 2003-05-22 2004-12-09 Asahi Sunac Corp 塗装装置
DE102007023931A1 (de) * 2007-05-23 2008-12-04 Dürr Systems GmbH Kolbenstangendichtung für einen Isolationszylinder einer Beschichtungsanlage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003095106A2 (fr) * 2002-05-07 2003-11-20 Behr Systems, Inc. Systeme de distribution de peinture et d'application et procede
DE102004056789A1 (de) * 2004-11-24 2006-06-01 Eisenmann Maschinenbau Gmbh & Co. Kg Elektrische Trenneinheit für eine Fluid-Förderleitung

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DE102014016552A1 (de) 2016-05-12
EP3017873A1 (fr) 2016-05-11

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