EP3188844B1 - Coating system for coating objects - Google Patents

Coating system for coating objects Download PDF

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Publication number
EP3188844B1
EP3188844B1 EP15753318.3A EP15753318A EP3188844B1 EP 3188844 B1 EP3188844 B1 EP 3188844B1 EP 15753318 A EP15753318 A EP 15753318A EP 3188844 B1 EP3188844 B1 EP 3188844B1
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EP
European Patent Office
Prior art keywords
line
supply line
supply
primary
application device
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
EP15753318.3A
Other languages
German (de)
French (fr)
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EP3188844A1 (en
Inventor
Felix KLINK
Tobias MOZER
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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Filing date
Publication date
Application filed by Eisenmann SE filed Critical Eisenmann SE
Priority to PL15753318T priority Critical patent/PL3188844T3/en
Publication of EP3188844A1 publication Critical patent/EP3188844A1/en
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Publication of EP3188844B1 publication Critical patent/EP3188844B1/en
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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
    • 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
    • B05B12/1472—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 separate supply lines supplying different materials to separate outlets of the spraying apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/24—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means incorporating means for heating the liquid or other fluent material, e.g. electrically
    • 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
    • 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

Definitions

  • lines are all flow paths for fluid media.
  • this also includes channels incorporated in the body, flow chambers or even through-openings.
  • Such coating systems for example, in the automotive industry, articles such as vehicle bodies or body parts are coated with the aid of electrostatically operating application devices.
  • the coating material such as a paint
  • the coating material is thereby released from the application device and exposed to an electric field in which the dispensed coating material is ionized and transported by electrostatic forces to the object, which for this purpose, for example, to ground potential lies.
  • Such an application device can be, for example, a high-rotation atomizer with a rotating bell cup, from which smallest droplets of paint are thrown off, so that a paint mist is formed.
  • the lines in the direction of the application device away during the coating process must build an insulation distance and this be clean and dry.
  • the lines are made in such cases of an electrically insulating material.
  • the pigging technique In the promotion of paints and other liquid materials through pipes, the pigging technique has established in which a sliding body, a so-called newt, pushes a volume of material in front of him. The pig is acted upon on the side remote from the delivery volume side with a pressurized fluid, which may be, for example, compressed air or a cleaning liquid, which cleans the line behind the pig.
  • a pressurized fluid which may be, for example, compressed air or a cleaning liquid, which cleans the line behind the pig.
  • ring lines are usually present, wherein by means of the supply unit, a fluid connection between a material-carrying loop and the piggable supply line can be made. Before the pig pushes the material towards the application device, the material is first forced into the system by the autogenous pressure which is present in the material sources, i. the ring lines prevails.
  • the line to the application device is quite long and can at least in sections have a relatively small diameter, which may for example be about 1 mm. Due to this relatively small diameter, there is a pressure loss along the line, the conveying of the material is made more difficult by the inherent pressure of the connected material source alone. In addition, the autogenous pressure in the material sources is usually not constant, but is technically conditioned, subject to irregular fluctuations, which also complicates a reproducibility of the volume delivered.
  • this arrangement according to the invention can be promoted by a pig in the direction of the application device with the secondary piston as a conveying element, a larger volume of material than would be possible without the secondary supply line and without a correspondingly configurable valve unit.
  • the primary and the secondary supply lines from the selected material source can be charged by the autogenous pressure, then the primary supply line connected to the secondary supply line and the material are conveyed by a pig in the secondary supply line in the direction of the application device ,
  • This pig can be acted upon with a predetermined and reproducible delivery pressure, so that pressure fluctuations in the material sources represent only a negligible irregularity.
  • a sufficiently large discharge pressure can be built on the material, so that even possible pressure losses along the conveying path to the application device can be compensated.
  • valve unit is set up such that, in addition, the output line of the supply unit can be connected to the secondary supply line.
  • a cleaning medium from a corresponding material source can be led through the supply unit and from there directly into the secondary supply line, in order to separate it from other line sections to clean the system.
  • the primary supply line is connected via the second pig station with a pig-free supply line, which in turn is connected to the application device.
  • This pig-free supply line preferably serves as an insulating path between an electrostatically operating application device and material-carrying lines.
  • the pig-free supply line is connected at the remote from the second pig station end with a storage container from which the application device can be fed.
  • a particularly uniform supply of the application device is achieved when the storage container is a piston dispenser.
  • a compact design is achieved when the second pig station of the primary supply line comprises the secondary digging station of the secondary supply line.
  • the secondary digging station can also be a separate station with its own connections and supply lines.
  • An effective material change can take place if the application device can be fed via a distributor from a first supply line or a second supply line which can be connected to the material sources, with all other components explained above being present separately in the first supply line and in the second supply line.
  • the figures schematically show a coating system 10 for coating objects, for example vehicle bodies or their parts or attachments.
  • the coating system 10 comprises an application device 12, which is shown only schematically in the present embodiment.
  • the application device 12 is an electrostatically operating high-speed rotary atomizer 14 with a rotating bell cup 16.
  • the application device 12 comprises a dispensing line 18, via which coating material can be dispensed onto a non-specifically shown item.
  • the discharge line 18 leads to the bell cup 16 of the high-rotation atomizer 14. The bell cup 16 and the discharge line 18 thus form a delivery device.
  • the application device 12 may optionally consist of a first feed container 20.1 in the form of a first piston meter 22.1 via a first feed line 24.1 of a first supply line 26.1 or from a second feed container 20.2 in the form of a piston meter 22.2 via a second feed line 24.2 of a second supply line 26.2 are fed with material.
  • the first piston dispenser 22.1 and the second piston dispenser 22.2 respectively illustrate only one example of a first storage container 20.1 and a second storage container 20.2 for coating material.
  • the two supply lines 26.1, 26.2 together form a supply system 26 and have the same structure, which is why, for the sake of simplicity, only the first supply line 26.1 will be explained further below.
  • Reference numerals for the same components and components carry the index ".1" in the first supply line 26.1 and the index ".2" in the case of the second supply line 26.2.
  • FIG. 1 For the sake of clarity, moreover, only in FIG. 1 all components of the second supply line 26.2 provided with reference numerals.
  • pigs shown in the first supply line 26.1 are not shown in the second supply line 26.2; This will be pointed out again below.
  • the manifold 28 is also connected to a cleaning line 30 of a cleaning system 32 not shown in detail and configured so that this cleaning line 30 can be selectively connected to the feed line 24.1, the feed line 24.2 or the discharge line 18.
  • a cleaning medium such as a solvent, or a pressurized fluid, eg compressed air, are supplied.
  • the piston dispenser 22. 1 comprises a cylinder 34. 1 in which a piston 36. 1 can be moved by means of a piston drive not specifically shown.
  • the piston 36.1 defines with the cylinder 34.1 a working space 38.1, which is connected to the first feed line 24.1 via a valve unit 40.1.
  • the working space 38.1 is connected via the valve unit 40.1 to a feed line 42.1 and an outlet line 44.1.
  • the feed line 42.1 is pig-free and in turn connected to a piggable base supply device 46.1, by means of which media can be conveyed using the pigging technology in the feed line 42.1.
  • the piggable base supply device 46.1 comprises as a supply unit a so-called color change unit 48.1, which is connected in a manner known per se via a valve arrangement not specifically shown with a loop system 50 with a plurality of media carrying lines 52, each of which is a material source define. Of such lines, only three paint lines 52a, 52b and 52c, a detergent line 52d and a compressed air line 52e are illustrated in the figures. In practice, there may well be fifty or more media carrying conduits 52 through which different paints or other media flow.
  • An output line 54.1 of the color changing unit 48.1 is connected via a piggable valve unit 56.1 and a first pig station 58.1 with a piggable supply line 60.1, in which a pig 62.1 can be moved, as it is known per se.
  • the first pig station 58.1 will subsequently serve as the start pig station 58.1 designates.
  • the piggable supply line 60. 1 is fluidically connected to the application device 12.
  • the piggable supply line 60.1 at its end remote from the valve unit 56.1, leads to a second pig station 64.1, which is referred to below as the destination pig station 64.1 and in turn connects the piggable supply line 60.1 to the feed line 42.1.
  • the Zielmolchstation 64.1 is also connected in a known manner with a working line 66.1, which can be closed or released by a valve not shown and via which the Zielmolchstation 64.1 and in this way on the one hand the piggable supply line 60.1 and the supply line 42.1 a working medium are supplied can or which can serve as an output line to drain medium from the pipe system.
  • the pig 62.1 can be moved between the starting pig station 56.1 and the destination pig station 64.1 in both directions.
  • the piggable supply line 60.1 is a primary supply line 68.1 and the pig 62.1 is a primary dagger 70.1.
  • the piggable base supply unit 46. 1 comprises a piggable secondary supply line 72. 1, which is connected to the valve unit 56 Valve unit 56.1 distal end is connected to the destination pig station 64.1. In the secondary supply line 72.1, a secondary pillar 74.1 can be moved.
  • a corresponding primary bar 70.1 is present in the piggable primary supply line 68.2 and a corresponding secondary bar 74.1 is present in the piggable secondary supply line 72.2.
  • these newts are not specifically shown.
  • the secondary supply line 72.1 of the base supply unit 46.1 is fluidly separated from the application device 12 at its end remote from the starting pig station 58.1 and the local valve unit 56.1. In particular, there is no direct connection between the secondary supply line 72.1 and the feed line 42.1 in the destination pig station 64.1.
  • the secondary supply line 72.1 is merely connected to a secondary working line 76.1 there, which can be closed or released by means of a valve which is not specifically shown.
  • a working medium can thus also be supplied to the piggable secondary supply line 72.1, or the secondary working line 76.1 can serve as an outlet line in order to discharge medium from the secondary supply line 72.1.
  • only one working line may be present at the target pig station 64.1.
  • the target pig station 64.1 is thus the piggable primary supply line with respect to the feed line 42.1 68.1, the piggable secondary supply line 72.1 and then the only existing working line designed as a directional control valve.
  • the piggable secondary supply line 66.1 is connected to the valve unit 56.1.
  • the valve unit 56.1 is configured as a multi-way valve in such a way that either the output line 54.1 of the color change unit 48.1 can be connected to the primary supply line 68.1 or to the secondary supply line 72.1, or the output line 54.1 of the color change unit 48.1 to the primary supply line 68.1 and the Secondary supply line 72.1 can be connected, or the primary supply line 68.1 can be connected to the secondary supply line 72.1, wherein the output line 54.1 is disabled.
  • the secondary supply line 72.1 serves as an auxiliary conveyor 78.1 and the base supply device 46.1 with the primary supply line 68.1 and the secondary supply line 72.1 operates in a color change as follows. In the following, only the processes of interest here will be explained, without going into detail on additional and known processes, which are required, for example, for cleaning line sections.
  • FIG. 1 assumed working configuration of the coating system 10, in which the application device 12 paint from the second piston dispenser 22.2 is supplied by the piston 36.2 is moved toward the valve unit 40.2.
  • the valve unit 40.2 blocks the supply line 42.2 and the outlet line 44.2 and releases the flow path to the distributor 28. This in turn connects the feed line 24.2 with the discharge line 18 of the application device 12, which applies the material from the second piston dispenser 22.2 on an object.
  • the application device 12 works electrostatically. Therefore, both supply lines 42.1 and 42.2 are cleaned and dried, so that in each supply line 26.1 and 26.2, an electrical insulation path between the associated piston dispenser 22.1 and 22.2 and the associated base supply device 46.1 and 46.2 is formed. Also, the feed line 24.1 between the manifold 28 and the first piston dispenser 22.1 is cleaned and dry, so that there is also an electrical insulation path is formed.
  • the primary supply line 68.1 and the secondary supply line 72.1 of the first basic supply device 46.1 are cleaned and dried; the primary shaft 70.1 and the secondary shaft 74.1 of the first base supply device 46.1 each occupy a parking position in the starting pig station 58.1, so that the output line 54.1 of the first color changing unit 48.1 terminates at the valve unit 56.1 between the two pigs.
  • the output line 54.1 of the first color changing unit 48.1 is now connected to that ring line 52 which carries the paint material which is to be applied next.
  • this is the paint line 52c;
  • the flow path to the valve unit 56.1 is in FIG. 1 illustrated by a stronger line.
  • explained flow paths are emphasized by a strong line guidance; the respective flow direction is illustrated by an arrow.
  • valve unit 56.1 of the first color changing unit 48.1 in a Be Stirllkonfiguration connected, in which the output line 54.1 of the first color changing unit 48.1 is connected to both the primary supply line 68.1 and with the secondary supply line 72.1.
  • paint now flows both into the primary supply line 68.1 and into the secondary supply line 72.1, wherein the paint material pushes the primary piston 70.1 and the secondary shaft 74.1 in front of them until they each have a filling position in their respective supply line Reached 72.1 and 72.2, respectively.
  • valve unit is 56.1 as it is in FIG. 3 is shown connected in a delivery configuration, in which the primary supply line 68.1 is connected to the secondary supply line 72.1.
  • the secondary dagger 74.1 is acted upon via the secondary working line 76.1 at the target pig station 64.1 on its side remote from the paint material with a pressure fluid, in particular compressed air or a cleaning agent, whereby the secondary dagger 74.1 presses against the paint material in the secondary supply line 72.1.
  • a pressure fluid in particular compressed air or a cleaning agent
  • the paint material can be conveyed to the piston dispenser 22.1 with a reproducible and in particular uniform pressure, without there being any pressure fluctuations, as occurs when the autogenous pressure in the loop system 50 is utilized, to supply a paint material to one of the piston dispensers 22.1 , 22.2. Also due to the smaller cross-section in the supply lines 42.1, 42.2 conditional pressure loss along the conveyor line can be effectively counteracted.
  • the secondary dagger 74.1 is pushed through the piggable valve unit 56.1 of the starting pig station 58.1 into the primary supply line 68.1, as a result of which the paint material continues to be forced through the primary supply line 68.1, the target pig station 64.1 and the supply line 42.1 into the piston dosing device 22.1 until it stops the desired amount of paint material is filled.
  • This operating state shows FIG. 4 ;
  • the secondary dagger 74.1 has reached a delivery end position in which it abuts the primary dagger 70.1 and the supply line 42.1 is filled with paint material.
  • the application device 12 Before now the electrostatic application process can be initiated and the application device 12 can be set to high voltage potential, first the application device 12 must be freed from the material from the second piston dispenser 22.2 and cleaned and at the same time freed the feed line 42.1 of conductive material and dried, so that between the Zielmolchstation 64.1 and the first piston dispenser 22.1 an electrical isolation path is established. For this purpose, first a cleaning fluid and then compressed air is forced into the line system via the cleaning line 30 at the distributor 28.
  • the cleaning fluid Via the feed line 24.1, the cleaning fluid reaches the valve unit 40.1 at the first piston dispenser 22.1 and in this way into the supply line 42.
  • the paint material still in the supply line 42.1 is first pressed by the cleaning fluid between the two pigs 70.1 and 74.1 at the target pig station 64.1 that the secondary arm 74.1 located in the primary supply line 68.1 and secondary supply line 72.1 pressure fluid through the secondary working line 76.1 at the destination pig station 64.1 can pump out of the system.
  • the valve unit 56.1 of the first color changing unit 48.1 is initially switched in a cleaning configuration such that the primary supply line 68.1 is connected to the secondary supply line 72.1 and the output line 54.1 of the first color changing unit 48.1 is blocked.
  • the cleaning configuration thus corresponds to the conveyor configuration.
  • FIG. 5 illustrates that the secondary dagger 74.1 occupies its parking position in the starting pig station 58.1
  • the valve unit 56.1 can be switched to a return configuration, in which the primary supply line 68.1 connected to the output line 54.1 and the secondary supply line 72.1 is locked. Then paint material is forced through the primary supply line 68.1 and back into the loop 52c.
  • the primary dagger 70.1 is returned to the primary supply line 68.1 in the direction of the starting pig station 58.1, so that this separates the phase boundary of recyclable paint material.
  • FIG. 6 shows finally reached the primary dagger 70.1 again his parking position in the starting pig station 58.1, which is behind the primary dagger 70.1 still a paint residue, cleaning fluid and compressed air.
  • the valve unit 56.1 is switched back into the cleaning configuration in which the primary supply line 68.1 is connected to the secondary supply line 72.1 and the output line 54.1 of the first color change unit 48.1 is blocked.
  • the compressed air now pushes this paint residue and the cleaning fluid from the open secondary working line 76.1 at the Zielmolchstation 64.1 out of the system, the then cleaned lines are dried by the compressed air.
  • the first supply line 26.1 is ready for the application of the paint material from the piston dispenser 22.1, for which the valve unit 40.1 blocks the supply line 42.1 and connects the piston dispenser 22.1 with the distributor 28, which releases the flow path to the dispensing line 18.
  • the piston 36.1 is moved in the direction of the valve unit 40.1, which is again indicated by an arrow, and the application of the paint material is carried out, as illustrated in FIG.
  • the second piston feeder 22.2 of the second supply line 26.2 can now be filled with material in the manner explained above.
  • the primary supply line 68.1 and the secondary supply line 72.1 can be applied during the application still on the working line 66.1 at the Zielmolchstation 64.1 with cleaning fluid and compressed air to perform any further purification of these lines.
  • FIG. 8 shows a modification of the coating system 10, in which the secondary supply lines 72.1 and 72.2 are not connected to the respective target pig station 64.1 and 64.2 of the two supply lines 26.1 and 26.2, but each connected to their own secondary digging station 80.1 and 80.2, which are the secondary Working line 76.1 or 76.2.
  • the processes are carried out in this coating system in the same manner as above to the FIGS. 1 to 7 was explained.
  • the target pig stations 64.1, 64.2 comprise the respective secondary digging stations 80.1, 80.2.

Description

Die Erfindung betrifft ein Beschichtungssystem zum Beschichten von Gegenständen mit

  1. a) einer Applikationsvorrichtung;
  2. b) einem Versorgungssystem, mittels welchem der Applikationsvorrichtung ein flüssiges Material zuführbar ist;
    wobei
  3. c) das Versorgungssystem wenigstens eine Basis-Versorgungseinrichtung mit einer molchbaren Versorgungsleitung umfasst, die sich zwischen einer ersten Molchstation und einer zweiten Molchstation erstreckt und mittels einer Versorgungseinheit mit einer von mehreren Materialquellen verbindbar ist.
    und
  4. d) die molchbare Versorgungsleitung eine molchbare Primär-Versorgungsleitung ist, die mittels einer Ventileinheit mit einer Ausgangsleitung der Versorgungseinheit verbindbar ist.
The invention relates to a coating system for coating objects with
  1. a) an application device;
  2. b) a supply system, by means of which the application device, a liquid material can be supplied;
    in which
  3. c) the supply system comprises at least one base supply device with a piggable supply line, which extends between a first pig station and a second pig station and is connectable by means of a supply unit with one of a plurality of material sources.
    and
  4. d) the piggable supply line is a piggable primary supply line which can be connected by means of a valve unit to an output line of the supply unit.

Ein solches Beschichtungssystem ist aus WO 2010/075322 bekanntSuch a coating system is out WO 2010/075322 known

Unter Leitungen sind vorliegend alle Strömungswege für fluide Medien zu verstehen. Hierzu zählen folglich neben flexiblen Schlauchleitungen oder starren Leitungen auch in Körper eingearbeitete Kanäle, Strömungsräume oder auch nur Durchgangsöffnungen.In the present case, lines are all flow paths for fluid media. In addition to flexible hose lines or rigid lines, this also includes channels incorporated in the body, flow chambers or even through-openings.

Mit derartigen Beschichtungssystemen werden zum Beispiel in der Automobilindustrie Gegenstände wie Fahrzeugkarosserien oder Karosserieteile mit Hilfe von elektrostatisch arbeitenden Applikationseinrichtungen beschichtet. Das Beschichtungsmaterial, z.B. ein Lack, wird dabei von der Applikationsvorrichtung abgegeben und einem elektrischen Feld ausgesetzt, in welchem das abgegebene Beschichtungsmaterial ionisiert und auf Grund elektrostatischer Kräfte zu dem Gegenstand transportiert wird, welcher hierzu z.B. auf Massepotential liegt. Eine solche Applikationsvorrichtung kann beispielsweise ein Hochrotationszerstäuber mit einem rotierenden Glockenteller sein, von dem kleinste Lacktröpfchen abgeschleudert werden, so dass sich ein Lacknebel ausbildet.With such coating systems, for example, in the automotive industry, articles such as vehicle bodies or body parts are coated with the aid of electrostatically operating application devices. The coating material, such as a paint, is thereby released from the application device and exposed to an electric field in which the dispensed coating material is ionized and transported by electrostatic forces to the object, which for this purpose, for example, to ground potential lies. Such an application device can be, for example, a high-rotation atomizer with a rotating bell cup, from which smallest droplets of paint are thrown off, so that a paint mist is formed.

Bei elektrostatisch arbeitenden Systemen müssen die Leitungen in Richtung von der Applikationseinrichtung weg beim Beschichtungsvorgang eine Isolationsstrecke aufbauen und hierzu sauber und trocken sein. Die Leitungen sind in solchen Fällen aus einem elektrisch isolierenden Material gefertigt.In electrostatically operating systems, the lines in the direction of the application device away during the coating process must build an insulation distance and this be clean and dry. The lines are made in such cases of an electrically insulating material.

Bei der Förderung von Lacken und anderen Flüssigmaterialien durch Leitungen hat sich die Molchtechnik etabliert, bei welcher ein Schiebekörper, ein so genannter Molch, ein Materialvolumen vor sich herschiebt. Der Molch wird dabei auf der von dem Fördervolumen abliegenden Seite mit einem Druckfluid beaufschlagt, bei dem es sich beispielsweise um Druckluft oder auch eine Reinigungsflüssigkeit handeln kann, welche die Leitung hinter dem Molch reinigt.In the promotion of paints and other liquid materials through pipes, the pigging technique has established in which a sliding body, a so-called newt, pushes a volume of material in front of him. The pig is acted upon on the side remote from the delivery volume side with a pressurized fluid, which may be, for example, compressed air or a cleaning liquid, which cleans the line behind the pig.

Als Materialquellen für das Beschichtungsmaterial sind in der Regel so genannte Ringleitungen vorhanden, wobei mittels der Versorgungseinheit eine Fluidverbindung zwischen einer Material führenden Ringleitung und der molchbaren Versorgungsleitung hergestellt werden kann. Bevor der Molch das Material dann in Richtung zur Applikationseinrichtung drückt, wird das Material zunächst durch den Eigendruck in das System gedrückt, der in den Materialquellen, d.h. den Ringleitungen herrscht.As material sources for the coating material so-called ring lines are usually present, wherein by means of the supply unit, a fluid connection between a material-carrying loop and the piggable supply line can be made. Before the pig pushes the material towards the application device, the material is first forced into the system by the autogenous pressure which is present in the material sources, i. the ring lines prevails.

Die Leitungsstrecke zur Applikationsvorrichtung ist recht lang und kann zumindest in Abschnitten einen verhältnismäßig kleinen Durchmesser haben, der z.B. bei etwa 1 mm liegen kann. Auf Grund dieses relativ kleinen Durchmessers kommt es entlang der Leitung zu einem Druckverlust, der das Fördern des Materials allein durch den Eigendruck der angeschlossenen Materialquelle erschwert. Zudem ist der Eigendruck in den Materialquellen in der Regel nicht konstant, sondern ist technisch bedingten, unregelmäßigen Schwankungen unterworfen, was auch eine Reproduzierbarkeit des geförderten Volumens erschwert.The line to the application device is quite long and can at least in sections have a relatively small diameter, which may for example be about 1 mm. Due to this relatively small diameter, there is a pressure loss along the line, the conveying of the material is made more difficult by the inherent pressure of the connected material source alone. In addition, the autogenous pressure in the material sources is usually not constant, but is technically conditioned, subject to irregular fluctuations, which also complicates a reproducibility of the volume delivered.

Es ist Aufgabe der Erfindung, ein Beschichtungssystem der eingangs genannten Art zu schaffen, welches diesen Gedanken Rechnung trägt.It is an object of the invention to provide a coating system of the type mentioned, which takes into account this idea.

Diese Aufgabe wird bei einem Beschichtungssystem der eingangs genannten Art dadurch gelöst, dass

  • e) eine molchbare Sekundär-Versorgungsleitung vorhanden ist, welche mit der Ventileinheit verbunden ist und am von der Ventileinheit abliegenden Ende mit einer Sekundärmolchstation verbunden ist;
    wobei
  • f) die Ventileinheit als Mehrwegeventil derart eingerichtet ist, dass zumindest wahlweise
    • fa) die Ausgangsleitung der Versorgungseinheit mit der Primär-Versorgungsleitung;
    • fb) die Ausgangsleitung der Versorgungseinheit mit der Primär-Versorgungsleitung und der Sekundär-Versorgungsleitung;
      oder
    • fc) die Primär-Versorgungsleitung mit der Sekundär-Versorgungsleitung
    verbunden werden kann.
This object is achieved in a coating system of the type mentioned in that
  • e) a piggable secondary supply line is present, which is connected to the valve unit and is connected at the remote end of the valve unit with a secondary digging station;
    in which
  • f) the valve unit is configured as a multi-way valve such that at least optionally
    • fa) the output line of the supply unit with the primary supply line;
    • fb) the output line of the supply unit with the primary supply line and the secondary supply line;
      or
    • fc) the primary supply line with the secondary supply line
    can be connected.

Durch diese erfindungsgemäße Anordnung kann mit dem Sekundärmolch als Förderelement ein größeres Materialvolumen durch einen Molch in Richtung auf die Applikationsvorrichtung gefördert werden, als es ohne die Sekundär-Versorgungsleitung und ohne eine entsprechend konfigurierbare Ventileinheit möglich wäre. Hierzu können zunächst die Primär- und die Sekundär-Versorgungsleitungen aus der gewählten Materialquelle durch deren Eigendruck beschickt werden, dann die Primär-Versorgungsleitung mit der Sekundär-Versorgungsleitung verbunden und das Material durch einen Molch in der Sekundär-Versorgungsleitung in Richtung auf die Applikationsvorrichtung gefördert werden. Dieser Molch kann mit einem vorgegebenen und reproduzierbaren Förderdruck beaufschlagt werden, so dass Druckschwankungen in den Materialquellen nur noch eine vernachlässigbare Unregelmäßigkeit darstellen. Darüber hinaus kann mit dem Molch ein ausreichend großer Förderdruck auf das Material aufgebaut werden, so dass auch mögliche Druckverluste entlang der Förderstrecke zur Applikationsvorrichtung kompensiert werden können.By this arrangement according to the invention can be promoted by a pig in the direction of the application device with the secondary piston as a conveying element, a larger volume of material than would be possible without the secondary supply line and without a correspondingly configurable valve unit. For this purpose, first the primary and the secondary supply lines from the selected material source can be charged by the autogenous pressure, then the primary supply line connected to the secondary supply line and the material are conveyed by a pig in the secondary supply line in the direction of the application device , This pig can be acted upon with a predetermined and reproducible delivery pressure, so that pressure fluctuations in the material sources represent only a negligible irregularity. In addition, with the pig a sufficiently large discharge pressure can be built on the material, so that even possible pressure losses along the conveying path to the application device can be compensated.

Es ist ergänzend von Vorteil, wenn die Ventileinheit derart eingerichtet ist, dass außerdem die Ausgangsleitung der Versorgungseinheit mit der Sekundär-Versorgungsleitung verbunden werden kann. So kann z.B. ein Reinigungsmedium aus einer entsprechenden Materialquelle durch die Versorgungseinheit und von dort unmittelbar in die Sekundär-Versorgungsleitung geführt werden, um diese unabhängig von anderen Leitungsabschnitten des Systems zu reinigen.It is additionally advantageous if the valve unit is set up such that, in addition, the output line of the supply unit can be connected to the secondary supply line. Thus, for example, a cleaning medium from a corresponding material source can be led through the supply unit and from there directly into the secondary supply line, in order to separate it from other line sections to clean the system.

Vorzugsweise ist die Primär-Versorgungsleitung über die zweite Molchstation mit einer molchfreien Zuführleitung verbunden, die ihrerseits mit der Applikationsvorrichtung verbunden ist. Diese molchfreie Zuführleitung dient bevorzugt als Isolationsstrecke zwischen einer elektrostatisch arbeitenden Applikationsvorrichtung und Material führenden Leitungen.Preferably, the primary supply line is connected via the second pig station with a pig-free supply line, which in turn is connected to the application device. This pig-free supply line preferably serves as an insulating path between an electrostatically operating application device and material-carrying lines.

Hierbei ist es besonders effektiv, wenn die molchfreie Zuführleitung am von der zweiten Molchstation abliegenden Ende mit einem Vorlagebehälter verbunden ist, aus welchem die Applikationsvorrichtung gespeist werden kann.It is particularly effective if the pig-free supply line is connected at the remote from the second pig station end with a storage container from which the application device can be fed.

Eine besonders gleichmäßige Versorgung der Applikationsvorrichtung wird erreicht, wenn der Vorlagebehälter ein Kolbendosierer ist.A particularly uniform supply of the application device is achieved when the storage container is a piston dispenser.

Ein kompakter Aufbau wird erreicht, wenn die zweite Molchstation der Primär-Versorgungsleitung die Sekundärmolchstation der Sekundär-Versorgungsleitung umfasst. Alternativ kann die Sekundärmolchstation aber auch eine separate Station mit eigenen Anschlüssen und Versorgungsleitungen sein.A compact design is achieved when the second pig station of the primary supply line comprises the secondary digging station of the secondary supply line. Alternatively, the secondary digging station can also be a separate station with its own connections and supply lines.

Ein effektiver Materialwechsel kann erfolgen, wenn die Applikationsvorrichtung über einen Verteiler aus einem ersten Versorgungsstrang oder einem zweiten Versorgungsstrang gespeist werden kann, die mit den Materialquellen verbindbar sind, wobei alle weiteren oben erläuterten Komponenten beim ersten Versorgungsstrang und beim zweiten Versorgungsstrang gesondert vorhanden sind.An effective material change can take place if the application device can be fed via a distributor from a first supply line or a second supply line which can be connected to the material sources, with all other components explained above being present separately in the first supply line and in the second supply line.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen erläutert. In diesen zeigen

Figur 1
schematisch ein Beschichtungssystem mit einer Applikationsvorrichtung und einer Versorgungsvorrichtung;
Figuren 2 bis 7
das Beschichtungssystem von Figur 1 in unterschiedlichen Betriebsphasen;
Figur 8
ein abgewandeltes Beschichtungssystem.
An embodiment of the invention will be described below explained the drawings. In this show
FIG. 1
schematically a coating system with an application device and a supply device;
FIGS. 2 to 7
the coating system of FIG. 1 in different phases of operation;
FIG. 8
a modified coating system.

Die Figuren zeigen schematisch ein Beschichtungssystem 10 zum Beschichten von Gegenständen, beispielsweise von Fahrzeugkarosserien oder von deren Teilen oder Anbauteilen.The figures schematically show a coating system 10 for coating objects, for example vehicle bodies or their parts or attachments.

Das Beschichtungssystem 10 umfasst eine Applikationsvorrichtung 12, die beim vorliegenden Ausführungsbeispiel nur schematisch gezeigt ist. Beim vorliegenden Ausführungsbeispiel ist die Applikationsvorrichtung 12 ein elektrostatisch arbeitender Hochrotationszerstäuber 14 mit einem rotierenden Glockenteller 16.The coating system 10 comprises an application device 12, which is shown only schematically in the present embodiment. In the present exemplary embodiment, the application device 12 is an electrostatically operating high-speed rotary atomizer 14 with a rotating bell cup 16.

Die Applikationsvorrichtung 12 umfasst eine Abgabeleitung 18, über welche Beschichtungsmaterial auf einen nicht eigens gezeigten Gegenstand abgegeben werden kann. Beim vorliegenden Ausführungsbeispiel führt die Abgabeleitung 18 zu dem Glockenteller 16 des Hochrotationszerstäubers 14. Der Glockenteller 16 und die Abgabeleitung 18 bilden somit eine Abgabeeinrichtung.The application device 12 comprises a dispensing line 18, via which coating material can be dispensed onto a non-specifically shown item. In the present embodiment, the discharge line 18 leads to the bell cup 16 of the high-rotation atomizer 14. The bell cup 16 and the discharge line 18 thus form a delivery device.

Die Applikationsvorrichtung 12 kann wahlweise aus einem ersten Vorlagebehälter 20.1 in Form eines ersten Kolbendosierers 22.1 über eine erste Speiseleitung 24.1 eines ersten Versorgungsstranges 26.1 oder aus einem zweiten Vorlagebehälter 20.2 in Form eines Kolbendosierers 22.2 über eine zweite Speiseleitung 24.2 eines zweiten Versorgungsstranges 26.2 mit Material gespeist werden. Der erste Kolbendosierer 22.1 und der zweite Kolbendosierer 22.2 veranschaulichen jeweils nur ein Beispiel für einen ersten Vorlagebehälter 20.1 bzw. einen zweiten Vorlagebehälter 20.2 für Beschichtungsmaterial.The application device 12 may optionally consist of a first feed container 20.1 in the form of a first piston meter 22.1 via a first feed line 24.1 of a first supply line 26.1 or from a second feed container 20.2 in the form of a piston meter 22.2 via a second feed line 24.2 of a second supply line 26.2 are fed with material. The first piston dispenser 22.1 and the second piston dispenser 22.2 respectively illustrate only one example of a first storage container 20.1 and a second storage container 20.2 for coating material.

Die beiden Versorgungsstränge 26.1, 26.2 bilden zusammen ein Versorgungssystem 26 und haben denselben Aufbau, weshalb nachfolgend der Einfachheit halber nur noch der erste Versorgungsstrang 26.1 weiter erläutert wird. Bezugszeichen für gleiche Bauteile und Komponenten tragen beim ersten Versorgungsstrang 26.1 den Index ".1" und beim zweiten Versorgungsstrang 26.2 den Index ".2". Der Übersichtlichkeit halber sind darüber hinaus nur in Figur 1 alle Komponenten des zweiten Versorgungsstrangs 26.2 mit Bezugszeichen versehen. Außerdem sind beim ersten Versorgungsstrang 26.1 gezeigte Molche beim zweiten Versorgungsstrang 26.2 nicht gezeigt; hierauf wird weiter unten nochmals konkret hingewiesen.The two supply lines 26.1, 26.2 together form a supply system 26 and have the same structure, which is why, for the sake of simplicity, only the first supply line 26.1 will be explained further below. Reference numerals for the same components and components carry the index ".1" in the first supply line 26.1 and the index ".2" in the case of the second supply line 26.2. For the sake of clarity, moreover, only in FIG. 1 all components of the second supply line 26.2 provided with reference numerals. In addition, pigs shown in the first supply line 26.1 are not shown in the second supply line 26.2; This will be pointed out again below.

Die beiden Speiseleitungen 24.1 und 24.2 münden am von den Kolbendosierern 22.1, 22.2 abliegenden Enden in einen Verteiler 28, der mit der Abgabeleitung 18 verbunden ist, so dass die Applikationsvorrichtung 12 wahlweise mit der Speiseleitung 24.1 oder mit der Speiseleitung 24.2 verbunden werden kann.The two supply lines 24.1 and 24.2 open at the remote from the piston dispensers 22.1, 22.2 ends in a manifold 28 which is connected to the discharge line 18, so that the application device 12 can be selectively connected to the feed line 24.1 or 24.2 with the feed line.

Der Verteiler 28 ist außerdem mit einer Reinigungsleitung 30 eines nicht näher gezeigten Reinigungssystems 32 verbunden und so konfiguriert, dass diese Reinigungsleitung 30 wahlweise mit der Speiseleitung 24.1, der Speiseleitung 24.2 oder der Abgabeleitung 18 verbunden werden kann. Auf dem Weg über die Reinigungsleitung 30 können dem Verteilter 28 in an und für sich bekannter Art und Weise aus zugehörigen Materialquellen ein Reinigungsmedium, z.B. ein Lösemittel, oder ein Druckfluid, z.B. Druckluft, zugeführt werden.The manifold 28 is also connected to a cleaning line 30 of a cleaning system 32 not shown in detail and configured so that this cleaning line 30 can be selectively connected to the feed line 24.1, the feed line 24.2 or the discharge line 18. On the way through the cleaning line 30, the distribution 28 in a manner known per se from associated material sources, a cleaning medium, such as a solvent, or a pressurized fluid, eg compressed air, are supplied.

Der Kolbendosierer 22.1 umfasst einen Zylinder 34.1, in dem ein Kolben 36.1 mit Hilfe eines nicht eigens gezeigten Kolbenantriebs bewegt werden kann. Der Kolben 36.1 begrenzt mit dem Zylinder 34.1 einen Arbeitsraum 38.1, welcher mit der ersten Speiseleitung 24.1 über eine Ventileinheit 40.1 verbunden ist. Außerdem ist der Arbeitsraum 38.1 über die Ventileinheit 40.1 mit einer Zuführleitung 42.1 und einer Auslassleitung 44.1 verbunden.The piston dispenser 22. 1 comprises a cylinder 34. 1 in which a piston 36. 1 can be moved by means of a piston drive not specifically shown. The piston 36.1 defines with the cylinder 34.1 a working space 38.1, which is connected to the first feed line 24.1 via a valve unit 40.1. In addition, the working space 38.1 is connected via the valve unit 40.1 to a feed line 42.1 and an outlet line 44.1.

Die Zuführleitung 42.1 ist molchfrei und ihrerseits mit einer molchbaren Basis-Versorgungseinrichtung 46.1 verbunden, mittels welcher Medien unter Anwendung der Molchtechnik in die Zuführleitung 42.1 gefördert werden können.The feed line 42.1 is pig-free and in turn connected to a piggable base supply device 46.1, by means of which media can be conveyed using the pigging technology in the feed line 42.1.

Die molchbare Basis-Versorgungseinrichtung 46.1 umfasst als Versorgungseinheit eine so genannte Farbwechseleinheit 48.1, welche in an und für sich bekannter Art und Weise über eine nicht eigens gezeigte Ventilanordnung mit einem Ringleitungssystem 50 mit einer Vielzahl von Medien führenden Leitungen 52 verbunden ist, welche jeweils eine Materialquelle definieren. Von solchen Leitungen sind in den Figuren lediglich drei Lackleitungen 52a, 52b und 52c, eine Reinigungsmittelleitung 52d und eine Druckluftleitung 52e veranschaulicht. In der Praxis können durchaus fünfzig oder mehr Medien führende Leitungen 52 vorhanden sein, durch die voneinander verschiedene Lacke oder sonstige Medien strömen.The piggable base supply device 46.1 comprises as a supply unit a so-called color change unit 48.1, which is connected in a manner known per se via a valve arrangement not specifically shown with a loop system 50 with a plurality of media carrying lines 52, each of which is a material source define. Of such lines, only three paint lines 52a, 52b and 52c, a detergent line 52d and a compressed air line 52e are illustrated in the figures. In practice, there may well be fifty or more media carrying conduits 52 through which different paints or other media flow.

Eine Ausgangsleitung 54.1 der Farbwechseleinheit 48.1 ist über eine molchbare Ventileinheit 56.1 und eine erste Molchstation 58.1 mit einer molchbaren Versorgungsleitung 60.1 verbunden, in der ein Molch 62.1 verschoben werden kann, wie es an und für sich bekannt ist. Die erste Molchstation 58.1 wird nachfolgend als Startmolchstation 58.1 bezeichnet. Die molchbare Versorgungsleitung 60.1 ist strömungstechnisch mit der Applikationsvorrichtung 12 verbunden. Zu diesem Zweck führt die molchbare Versorgungsleitung 60.1 an ihrem von der Ventileinheit 56.1 abliegenden Ende zu einer zweiten Molchstation 64.1, welche nachfolgend als Zielmolchstation 64.1 bezeichnet wird und ihrerseits die molchbare Versorgungsleitung 60.1 mit der Zuführleitung 42.1 verbindet.An output line 54.1 of the color changing unit 48.1 is connected via a piggable valve unit 56.1 and a first pig station 58.1 with a piggable supply line 60.1, in which a pig 62.1 can be moved, as it is known per se. The first pig station 58.1 will subsequently serve as the start pig station 58.1 designates. The piggable supply line 60. 1 is fluidically connected to the application device 12. For this purpose, the piggable supply line 60.1, at its end remote from the valve unit 56.1, leads to a second pig station 64.1, which is referred to below as the destination pig station 64.1 and in turn connects the piggable supply line 60.1 to the feed line 42.1.

Die Zielmolchstation 64.1 ist außerdem in bekannter Weise mit einer Arbeitsleitung 66.1 verbunden, die mittels eines nicht eigens gezeigten Ventils verschlossen oder freigegeben werden kann und über welche der Zielmolchstation 64.1 und auf diesem Wege einerseits der molchbaren Versorgungsleitung 60.1 und andererseits der Zuführleitung 42.1 ein Arbeitsmedium zugeführt werden kann oder welche als Ausgangsleitung dienen kann, um Medium aus dem Leitungssystem abzulassen.The Zielmolchstation 64.1 is also connected in a known manner with a working line 66.1, which can be closed or released by a valve not shown and via which the Zielmolchstation 64.1 and in this way on the one hand the piggable supply line 60.1 and the supply line 42.1 a working medium are supplied can or which can serve as an output line to drain medium from the pipe system.

Der Molch 62.1 jedenfalls kann zwischen der Startmolchstation 56.1 und der Zielmolchstation 64.1 in beiden Richtungen bewegt werden.In any case, the pig 62.1 can be moved between the starting pig station 56.1 and the destination pig station 64.1 in both directions.

Wie eingangs erläutert wurde, kommt es in der Zuführleitung 42.1 auf Grund deren geringem Querschnitt und/oder deren großer Länge zu Druckverlusten, so dass nicht immer sichergestellt ist, dass ein Medium durch den Eigendruck des Ringleitungssystems einwandfrei in die Zuführleitung 42.1 und den daran angeschlossenen Kolbendosierer 22.1 gefördert wird.As explained at the outset, pressure losses occur in the feed line 42.1 due to their small cross-section and / or their long length, so that it is not always ensured that a medium through the autogenous pressure of the loop system properly into the supply line 42.1 and the piston dispenser connected thereto 22.1 is promoted.

Aus diesem Grund ist die molchbare Versorgungsleitung 60.1 eine Primär-Versorgungsleitung 68.1 und der Molch 62.1 ein Primärmolch 70.1. Außerdem umfasst die molchbare Basis-Versorgungseinheit 46.1 eine molchbare Sekundär-Versorgungsleitung 72.1, die mit der Ventileinheit 56.1 und am von der Ventileinheit 56.1 abliegenden Ende mit der Zielmolchstation 64.1 verbunden ist. In der Sekundär-Versorgungsleitung 72.1 kann ein Sekundärmolch 74.1 verschoben werden.For this reason, the piggable supply line 60.1 is a primary supply line 68.1 and the pig 62.1 is a primary dagger 70.1. In addition, the piggable base supply unit 46. 1 comprises a piggable secondary supply line 72. 1, which is connected to the valve unit 56 Valve unit 56.1 distal end is connected to the destination pig station 64.1. In the secondary supply line 72.1, a secondary pillar 74.1 can be moved.

Bei der molchbaren zweiten Basis-Versorgungseinrichtung 46.2 des zweiten Versorgungsstranges 26.2 sind in der molchbaren Primär-Versorgungsleitung 68.2 ein entsprechender Primärmolch 70.1 und in der molchbaren Sekundär-Versorgungsleitung 72.2 ein entsprechender Sekundärmolch 74.1 vorhanden. Diese Molche sind jedoch, wie oben bereits erwähnt wurde, nicht eigens gezeigt.In the piggable second base supply device 46.2 of the second supply line 26.2, a corresponding primary bar 70.1 is present in the piggable primary supply line 68.2 and a corresponding secondary bar 74.1 is present in the piggable secondary supply line 72.2. However, as mentioned above, these newts are not specifically shown.

Die Sekundär-Versorgungsleitung 72.1 der Basis-Versorgungseinheit 46.1 ist an ihrem von der Startmolchstation 58.1 und der dortigen Ventileinheit 56.1 abliegenden Ende strömungstechnisch von der Applikationsvorrichtung 12 getrennt. Insbesondere gibt es keine direkte Verbindung zwischen der Sekundär-Versorgungsleitung 72.1 und der Zuführleitung 42.1 in der Zielmolchstation 64.1.The secondary supply line 72.1 of the base supply unit 46.1 is fluidly separated from the application device 12 at its end remote from the starting pig station 58.1 and the local valve unit 56.1. In particular, there is no direct connection between the secondary supply line 72.1 and the feed line 42.1 in the destination pig station 64.1.

An der Zielmolchstation 64.1 ist die Sekundär-Versorgungsleitung 72.1 lediglich mit einer dortigen Sekundär-Arbeitsleitung 76.1 verbunden, die mittels eines nicht eigens gezeigtes Ventils geschlossen oder freigegeben werden kann. Über die Sekundär-Arbeitsleitung 76.1 der Zielmolchstation 64.1 kann somit auch der molchbaren Sekundär-Versorgungsleitung 72.1 ein Arbeitsmedium zugeführt werden oder die Sekundär-Arbeitsleitung 76.1 kann als Ausgangsleitung dienen, um Medium aus der Sekundär-Versorgungsleitung 72.1 abzulassen.At the destination pig station 64.1, the secondary supply line 72.1 is merely connected to a secondary working line 76.1 there, which can be closed or released by means of a valve which is not specifically shown. By means of the secondary working line 76.1 of the target pig station 64.1, a working medium can thus also be supplied to the piggable secondary supply line 72.1, or the secondary working line 76.1 can serve as an outlet line in order to discharge medium from the secondary supply line 72.1.

Bei einer nicht eigens gezeigten Abwandlung kann an der Zielmolchstation 64.1 auch nur eine Arbeitsleitung vorhanden sein. In diesem Fall ist die Zielmolchstation 64.1 folglich bezogen auf die Zuführleitung 42.1, die molchbare Primär-Versorgungsleitung 68.1, die molchbare Sekundär-Versorgungsleitung 72.1 und die dann einzige vorhandene Arbeitsleitung als Wegeventil ausgebildet.In a modification not specifically shown, only one working line may be present at the target pig station 64.1. In this case, the target pig station 64.1 is thus the piggable primary supply line with respect to the feed line 42.1 68.1, the piggable secondary supply line 72.1 and then the only existing working line designed as a directional control valve.

An der Startmolchstation 58.1 ist die molchbare Sekundär-Versorgungsleitung 66.1 mit der Ventileinheit 56.1 verbunden. Die Ventileinheit 56.1 ist als Mehrwegeventil derart eingerichtet, dass wahlweise die Ausgangsleitung.54.1 der Farbwechseleinheit 48.1 mit der Primär-Versorgungsleitung 68.1 oder mit der Sekundär-Versorgungsleitung 72.1 verbunden werden kann, oder die Ausgangsleitung 54.1 der Farbwechseleinheit 48.1 mit der Primär-Versorgungsleitung 68.1 und der Sekundär-Versorgungsleitung 72.1 verbunden werden kann, oder die Primär-Versorgungsleitung 68.1 mit der Sekundär-Versorgungsleitung 72.1 verbunden werden kann, wobei die Ausgangsleitung 54.1 gesperrt ist.At the starting pig station 58.1, the piggable secondary supply line 66.1 is connected to the valve unit 56.1. The valve unit 56.1 is configured as a multi-way valve in such a way that either the output line 54.1 of the color change unit 48.1 can be connected to the primary supply line 68.1 or to the secondary supply line 72.1, or the output line 54.1 of the color change unit 48.1 to the primary supply line 68.1 and the Secondary supply line 72.1 can be connected, or the primary supply line 68.1 can be connected to the secondary supply line 72.1, wherein the output line 54.1 is disabled.

Die Sekundär-Versorgungsleitung 72.1 dient als Hilfsfördereinrichtung 78.1 und die Basis-Versorgungseinrichtung 46.1 mit der Primär-Versorgungsleitung 68.1 und der Sekundär-Versorgungsleitung 72.1 arbeitet bei einem Farbwechsel wie folgt. Nachfolgend werden lediglich die hier interessierenden Abläufe erläutert, ohne dass im Einzelnen auf ergänzende und bekannte Vorgänge, die beispielsweise zum Reinigen von Leitungsabschnitten erforderlich sind, eingegangen wird.The secondary supply line 72.1 serves as an auxiliary conveyor 78.1 and the base supply device 46.1 with the primary supply line 68.1 and the secondary supply line 72.1 operates in a color change as follows. In the following, only the processes of interest here will be explained, without going into detail on additional and known processes, which are required, for example, for cleaning line sections.

Als Ausgangssituation sei eine in Figur 1 gezeigte Arbeitskonfiguration des Beschichtungssystems 10 angenommen, bei welcher der Applikationseinrichtung 12 Lack aus dem zweiten Kolbendosierer 22.2 zugeführt wird, indem dessen Kolben 36.2 in Richtung auf die Ventileinheit 40.2 zu bewegt wird. Die Ventileinheit 40.2 sperrt dabei die Zuführleitung 42.2 und die Auslassleitung 44.2 und gibt den Strömungsweg zum Verteiler 28 frei. Dieser verbindet seinerseits die Speiseleitung 24.2 mit der Abgabeleitung 18 der Applikationsvorrichtung 12, welche das Material aus dem zweiten Kolbendosierer 22.2 auf einen Gegenstand appliziert.As a starting point, there was an in FIG. 1 assumed working configuration of the coating system 10, in which the application device 12 paint from the second piston dispenser 22.2 is supplied by the piston 36.2 is moved toward the valve unit 40.2. The valve unit 40.2 blocks the supply line 42.2 and the outlet line 44.2 and releases the flow path to the distributor 28. This in turn connects the feed line 24.2 with the discharge line 18 of the application device 12, which applies the material from the second piston dispenser 22.2 on an object.

Die Applikationsvorrichtung 12 arbeitet elektrostatisch. Daher sind beide Zuführleitungen 42.1 und 42.2 gereinigt und getrocknet, so dass bei jedem Versorgungsstrang 26.1 und 26.2 eine elektrische Isolationsstrecke zwischen dem zugehörigen Kolbendosierer 22.1 bzw. 22.2 und der damit verbundenen Basis-Versorgungseinrichtung 46.1 bzw. 46.2 ausgebildet ist. Auch die Speiseleitung 24.1 zwischen dem Verteiler 28 und dem ersten Kolbendosierer 22.1 ist gereinigt und trocken, so dass dort ebenfalls eine elektrische Isolationsstrecke ausgebildet ist.The application device 12 works electrostatically. Therefore, both supply lines 42.1 and 42.2 are cleaned and dried, so that in each supply line 26.1 and 26.2, an electrical insulation path between the associated piston dispenser 22.1 and 22.2 and the associated base supply device 46.1 and 46.2 is formed. Also, the feed line 24.1 between the manifold 28 and the first piston dispenser 22.1 is cleaned and dry, so that there is also an electrical insulation path is formed.

Außerdem sind die Primär-Versorgungsleitung 68.1 und die Sekundär-Versorgungsleitung 72.1 der ersten Basis-Versorgungseinrichtung 46.1 gereinigt und getrocknet; der Primärmolch 70.1 und der Sekundärmolch 74.1 der ersten Basis-Versorgungseinrichtung 46.1 nehmen jeweils eine Parkposition in der Startmolchstation 58.1 ein, so dass die Ausgangsleitung 54.1 der ersten Farbwechseleinheit 48.1 an der Ventileinheit 56.1 zwischen den beiden Molchen endet.In addition, the primary supply line 68.1 and the secondary supply line 72.1 of the first basic supply device 46.1 are cleaned and dried; the primary shaft 70.1 and the secondary shaft 74.1 of the first base supply device 46.1 each occupy a parking position in the starting pig station 58.1, so that the output line 54.1 of the first color changing unit 48.1 terminates at the valve unit 56.1 between the two pigs.

Für einen Farbwechsel wird nun die Ausgangsleitung 54.1 der ersten Farbwechseleinheit 48.1 mit derjenigen Ringleitung 52 verbunden, welche das Lackmaterial führt, welches als nächstes appliziert werden soll. Beispielsweise sei dies die Lackleitung 52c; der Strömungsweg zur Ventileinheit 56.1 ist in Figur 1 durch einen stärkeren Strich veranschaulicht. Auch im Weiteren sind erläuterte Strömungswege durch eine stärke Strichführung hervorgehoben; die jeweilige Strömungsrichtung ist durch einen Pfeil veranschaulicht.For a color change, the output line 54.1 of the first color changing unit 48.1 is now connected to that ring line 52 which carries the paint material which is to be applied next. For example, this is the paint line 52c; the flow path to the valve unit 56.1 is in FIG. 1 illustrated by a stronger line. In the following, explained flow paths are emphasized by a strong line guidance; the respective flow direction is illustrated by an arrow.

Mit Bezug auf Figur 2 wird nun die Ventileinheit 56.1 der ersten Farbwechseleinheit 48.1 in eine Befüllkonfiguration geschaltet, bei welcher die Ausgangsleitung 54.1 der ersten Farbwechseleinheit 48.1 sowohl mit der Primär-Versorgungsleitung 68.1 als auch mit der Sekundär-Versorgungsleitung 72.1 verbunden ist. Durch den in der Ringleitung 52c herrschenden Eigendruck strömt nun Lack sowohl in die Primär-Versorgungsleitung 68.1 als auch in die Sekundär-Versorgungsleitung 72.1, wobei das Lackmaterial den Primärmolch 70.1 und den Sekundärmolch 74.1 vor sich herschiebt, bis diese jeweils eine Befüllposition in ihrer jeweiligen Versorgungsleitung 72.1 bzw. 72.2 erreicht haben.Regarding FIG. 2 Now, the valve unit 56.1 of the first color changing unit 48.1 in a Befüllkonfiguration connected, in which the output line 54.1 of the first color changing unit 48.1 is connected to both the primary supply line 68.1 and with the secondary supply line 72.1. By virtue of the inherent pressure prevailing in the ring line 52c, paint now flows both into the primary supply line 68.1 and into the secondary supply line 72.1, wherein the paint material pushes the primary piston 70.1 and the secondary shaft 74.1 in front of them until they each have a filling position in their respective supply line Reached 72.1 and 72.2, respectively.

Nun wird die Ventileinheit 56.1, wie es in Figur 3 gezeigt ist, in eine Förderkonfiguration geschaltet, bei welcher die Primär-Versorgungsleitung 68.1 mit der Sekundär-Versorgungsleitung 72.1 verbunden ist. Dann wird der Sekundärmolch 74.1 über die Sekundär-Arbeitsleitung 76.1 an der Zielmolchstation 64.1 auf seiner von dem Lackmaterial abliegenden Seite mit einem Druckfluid, insbesondere Druckluft oder einem Reinigungsmittel, beaufschlagt, wodurch der Sekundärmolch 74.1 gegen das Lackmaterial in der Sekundär-Versorgungsleitung 72.1 andrückt. Hierdurch wird das Lackmaterial in der Primär-Versorgungsleitung 68.1 und der Sekundär-Versorgungsleitung 72.1 durch die Zielmolchstation 64.1 in die Zuführleitung 42.1 und auf diesem Wege in den Kolbendosierer 22.1 gefördert, dessen Kolben 36.1 sich entsprechend von der Ventileinheit 40.1 wegbewegt. Dies ist durch einen Pfeil angedeutet.Now the valve unit is 56.1 as it is in FIG. 3 is shown connected in a delivery configuration, in which the primary supply line 68.1 is connected to the secondary supply line 72.1. Then the secondary dagger 74.1 is acted upon via the secondary working line 76.1 at the target pig station 64.1 on its side remote from the paint material with a pressure fluid, in particular compressed air or a cleaning agent, whereby the secondary dagger 74.1 presses against the paint material in the secondary supply line 72.1. As a result, the paint material in the primary supply line 68.1 and the secondary supply line 72.1 is conveyed through the target pig station 64.1 into the feed line 42.1 and in this way into the piston dispenser 22.1, whose piston 36.1 correspondingly moves away from the valve unit 40.1. This is indicated by an arrow.

Durch den Sekundärmolch 74.1 kann das Lackmaterial mit einem reproduzierbaren und insbesondere gleichmäßigen Druck zu dem Kolbendosierer 22.1 gefördert werden, ohne dass es zu Druckschwankungen kommt, wie sie auftreten, wenn der Eigendruck in dem Ringleitungssystem 50 genutzt wird, um ein Lackmaterial zu einem der Kolbendosierer 22.1, 22.2 zu fördern. Auch dem durch den kleineren Querschnitt in den Zuführleitungen 42.1, 42.2 bedingtem Druckverlust entlang der Förderstrecke kann so effektiv entgegengewirkt werden.By the secondary arm 74.1, the paint material can be conveyed to the piston dispenser 22.1 with a reproducible and in particular uniform pressure, without there being any pressure fluctuations, as occurs when the autogenous pressure in the loop system 50 is utilized, to supply a paint material to one of the piston dispensers 22.1 , 22.2. Also due to the smaller cross-section in the supply lines 42.1, 42.2 conditional pressure loss along the conveyor line can be effectively counteracted.

Der Sekundärmolch 74.1 wird durch die molchbare Ventileinheit 56.1 der Startmolchstation 58.1 hindurch in die Primär-Versorgungsleitung 68.1 gedrückt, wodurch das Lackmaterial weiter durch die Primär-Versorgungsleitung 68.1, die Zielmolchstation 64.1 und die Zuführleitung 42.1 hindurch in den Kolbendosierer 22.1 gedrückt wird, bis dieser mit der gewünschten Menge an Lackmaterial gefüllt ist. Diesen Betriebszustand zeigt Figur 4; dort hat der Sekundärmolch 74.1 eine Förderendposition erreicht, in welcher er an den Primärmolch 70.1 anstößt und die Zuführleitung 42.1 ist mit Lackmaterial gefüllt.The secondary dagger 74.1 is pushed through the piggable valve unit 56.1 of the starting pig station 58.1 into the primary supply line 68.1, as a result of which the paint material continues to be forced through the primary supply line 68.1, the target pig station 64.1 and the supply line 42.1 into the piston dosing device 22.1 until it stops the desired amount of paint material is filled. This operating state shows FIG. 4 ; There, the secondary dagger 74.1 has reached a delivery end position in which it abuts the primary dagger 70.1 and the supply line 42.1 is filled with paint material.

Bevor nun der elektrostatische Applikationsvorgang eingeleitet und die Applikationsvorrichtung 12 auf Hochspannungspotential gesetzt werden kann, muss zunächst die Applikationsvorrichtung 12 von dem Material aus dem zweiten Kolbendosierer 22.2 befreit und gereinigt und zugleich die Zuführleitung 42.1 von leitendem Material befreit und getrocknet werden, so dass zwischen der Zielmolchstation 64.1 und dem ersten Kolbendosierer 22.1 eine elektrische Isolationsstrecke aufgebaut wird. Hierzu wird über die Reinigungsleitung 30 am Verteiler 28 zunächst ein Reinigungsfluid und dann Druckluft in das Leitungssystem gedrückt.Before now the electrostatic application process can be initiated and the application device 12 can be set to high voltage potential, first the application device 12 must be freed from the material from the second piston dispenser 22.2 and cleaned and at the same time freed the feed line 42.1 of conductive material and dried, so that between the Zielmolchstation 64.1 and the first piston dispenser 22.1 an electrical isolation path is established. For this purpose, first a cleaning fluid and then compressed air is forced into the line system via the cleaning line 30 at the distributor 28.

Über die Speiseleitung 24.1 gelangt das Reinigungsfluid zur Ventileinheit 40.1 am ersten Kolbendosierer 22.1 und auf diesem Wege in die Zuführleitung 42. Das noch in der Zurührleitung 42.1 befindliche Lackmaterial wird durch das Reinigungsfluid zunächst zwischen die beiden Molche 70.1 und 74.1 an der Zielmolchstation 64.1 gedrückt, so dass der Sekundärmolch 74.1 das in der Primär-Versorgungsleitung 68.1 und Sekundär-Versorgungsleitung 72.1 befindliche Druckfluid durch die Sekundär-Arbeitsleitung 76.1 an der Zielmolchstation 64.1 aus dem System herausfördern kann. Hierzu ist die Ventileinheit 56.1 der ersten Farbwechseleinheit 48.1 zunächst in einer Reinigungskonfiguration so geschaltet, dass die Primär-Versorgungsleitung 68.1 mit der Sekundär-Versorgungsleitung 72.1 verbunden und die Ausgangsleitung 54.1 der ersten Farbwechseleinheit 48.1 gesperrt ist. Die Reinigungskonfiguration entspricht somit der Förderkonfiguration.Via the feed line 24.1, the cleaning fluid reaches the valve unit 40.1 at the first piston dispenser 22.1 and in this way into the supply line 42. The paint material still in the supply line 42.1 is first pressed by the cleaning fluid between the two pigs 70.1 and 74.1 at the target pig station 64.1 that the secondary arm 74.1 located in the primary supply line 68.1 and secondary supply line 72.1 pressure fluid through the secondary working line 76.1 at the destination pig station 64.1 can pump out of the system. For this purpose, the valve unit 56.1 of the first color changing unit 48.1 is initially switched in a cleaning configuration such that the primary supply line 68.1 is connected to the secondary supply line 72.1 and the output line 54.1 of the first color changing unit 48.1 is blocked. The cleaning configuration thus corresponds to the conveyor configuration.

Wenn dann, wie es Figur 5 veranschaulicht, der Sekundärmolch 74.1 seine Parkposition in der Startmolchstation 58.1 einnimmt, kann die Ventileinheit 56.1 in eine Rückführkonfiguration geschaltet werden, in welcher die Primär-Versorgungsleitung 68.1 mit der Ausgangsleitung 54.1 verbunden und die Sekundär-Versorgungsleitung 72.1 gesperrt ist. Dann wird Lackmaterial durch die Primär-Versorgungsleitung 68.1 und zurück in die Ringleitung 52c gedrückt. Wenn die Phasengrenze zwischen Reinigungsfluid und Lackmaterial aus der Zuführleitung 42.1 zur Zielmolchstation 64.1 gelangt, wie es Figur 5 ebenfalls zeigt, wird der Primärmolch 70.1 wieder in die Primär-Versorgungsleitung 68.1 in Richtung auf die Startmolchstation 58.1 gegeben, so dass dieser die Phasengrenze von wieder verwertbarem Lackmaterial trennt.If so, how it is FIG. 5 illustrates that the secondary dagger 74.1 occupies its parking position in the starting pig station 58.1, the valve unit 56.1 can be switched to a return configuration, in which the primary supply line 68.1 connected to the output line 54.1 and the secondary supply line 72.1 is locked. Then paint material is forced through the primary supply line 68.1 and back into the loop 52c. When the phase boundary between cleaning fluid and paint material passes from the supply line 42.1 to the target pig station 64.1, as it FIG. 5 also shows, the primary dagger 70.1 is returned to the primary supply line 68.1 in the direction of the starting pig station 58.1, so that this separates the phase boundary of recyclable paint material.

Wie Figur 6 zeigt, erreicht schließlich auch der Primärmolch 70.1 wieder seine Parkposition in der Startmolchstation 58.1, wobei sich hinter dem Primärmolch 70.1 noch ein Lackrest, Reinigungsfluid und Druckluft befindet. Dann wird die Ventileinheit 56.1 wieder in die Reinigungskonfiguration geschaltet, in welcher die Primär-Versorgungsleitung 68.1 mit der Sekundär-Versorgungsleitung 72.1 verbunden und die Ausgangsleitung 54.1 der ersten Farbwechseleinheit 48.1 gesperrt ist. Die Druckluft drückt nun diesen Lackrest und das Reinigungsfluid aus der geöffneten Sekundär-Arbeitsleitung 76.1 an der Zielmolchstation 64.1 aus dem System heraus, wobei die dann gereinigten Leitungen durch die Druckluft getrocknet werden.As FIG. 6 shows finally reached the primary dagger 70.1 again his parking position in the starting pig station 58.1, which is behind the primary dagger 70.1 still a paint residue, cleaning fluid and compressed air. Then the valve unit 56.1 is switched back into the cleaning configuration in which the primary supply line 68.1 is connected to the secondary supply line 72.1 and the output line 54.1 of the first color change unit 48.1 is blocked. The compressed air now pushes this paint residue and the cleaning fluid from the open secondary working line 76.1 at the Zielmolchstation 64.1 out of the system, the then cleaned lines are dried by the compressed air.

Nun ist der erste Versorgungsstrang 26.1 bereit für die Applikation des Lackmaterials aus dem Kolbendosierer 22.1, wozu die Ventileinheit 40.1 die Zuführleitung 42.1 sperrt und den Kolbendosierer 22.1 mit dem Verteiler 28 verbindet, welcher den Strömungsweg zur Abgabeleitung 18 freigibt. Der Kolben 36.1 wird in Richtung auf die Ventileinheit 40.1 bewegt, was erneut durch einen Pfeil angedeutet ist, und die Applikation des Lackmaterials wird durchgeführt, wie es Figur 7 veranschaulicht.Now the first supply line 26.1 is ready for the application of the paint material from the piston dispenser 22.1, for which the valve unit 40.1 blocks the supply line 42.1 and connects the piston dispenser 22.1 with the distributor 28, which releases the flow path to the dispensing line 18. The piston 36.1 is moved in the direction of the valve unit 40.1, which is again indicated by an arrow, and the application of the paint material is carried out, as illustrated in FIG.

Während dieses Applikationsvorgangs kann nun der zweite Kolbendosierer 22.2 des zweiten Versorgungsstranges 26.2 in der oben erläuterten Art und Weise mit Material gefüllt werden.During this application process, the second piston feeder 22.2 of the second supply line 26.2 can now be filled with material in the manner explained above.

Gegebenenfalls können die Primär-Versorgungsleitung 68.1 und die Sekundär-Versorgungsleitung 72.1 während der Applikation noch über die Arbeitsleitung 66.1 an der Zielmolchstation 64.1 mit Reinigungsfluid und Druckluft beaufschlagt werden, um eine etwaige weitere Reinigung dieser Leitungen durchzuführen.Optionally, the primary supply line 68.1 and the secondary supply line 72.1 can be applied during the application still on the working line 66.1 at the Zielmolchstation 64.1 with cleaning fluid and compressed air to perform any further purification of these lines.

Figur 8 zeigt eine Abwandlung des Beschichtungssystems 10, bei welchem die Sekundär-Versorgungsleitungen 72.1 und 72.2 nicht mit der jeweiligen Zielmolchstation 64.1 bzw. 64.2 der beiden Versorgungsstränge 26.1 und 26.2 verbunden sind, sondern jeweils mit einer eigenen Sekundärmolchstation 80.1 bzw. 80.2 verbunden sind, welche die Sekundär-Arbeitsleitung 76.1 bzw. 76.2 aufweist. FIG. 8 shows a modification of the coating system 10, in which the secondary supply lines 72.1 and 72.2 are not connected to the respective target pig station 64.1 and 64.2 of the two supply lines 26.1 and 26.2, but each connected to their own secondary digging station 80.1 and 80.2, which are the secondary Working line 76.1 or 76.2.

Die Abläufe erfolgen bei diesem Beschichtungssystem jedoch in der gleichen Weise, wie es oben zu den Figuren 1 bis 7 erläutert wurde. Bei dem Ausführungsbeispiel nach den Figuren 1 bis 7 umfassen somit die Zielmolchstationen 64.1, 64.2 die jeweiligen Sekundärmolchstationen 80.1, 80.2.However, the processes are carried out in this coating system in the same manner as above to the FIGS. 1 to 7 was explained. In the embodiment of the FIGS. 1 to 7 Thus, the target pig stations 64.1, 64.2 comprise the respective secondary digging stations 80.1, 80.2.

Claims (7)

  1. Coating system for coating objects, having
    a) an application device (12);
    b) a supply system (26), by means of which a liquid material can be fed to the application device (12);
    wherein
    c) the supply system comprises at least one base supply device (46.1) with a piggable supply line (60.1) extending between a first pigging station (58.1) and a second pigging station (64.1) and being connectable to one of a plurality of material sources (52) by means of a supply unit (48.1);
    d) the piggable supply line (60.1) is a piggable primary supply line (68.1), which can be connected to an outlet line (54.1) of the supply unit (48.1) by means of a valve unit (56.1),
    characterized in that
    e) a piggable secondary supply line (72.1) is present, which is connected to the valve unit (56.1) and is connected at the end located away from the valve unit (56.1) to a secondary pigging station (64.1; 80.1);
    wherein
    f) the valve unit (56.1) is configured as a multi-way valve such that at least optionally
    fa) the outlet line (54.1) of the supply unit (48.1) can be connected to the primary supply line (68.1);
    fb) the outlet line (54.1) of the supply unit (48.1) can be connected to the primary supply line (68.1) and the secondary supply line (72.1);
    or
    fc) the primary supply line (68.1) can be connected to the secondary supply line (72.1).
  2. Coating system according to claim 1, characterized in that the valve unit (56.1) is configured such that the outlet line (54.1) of the supply unit (48.1) can also be connected to the secondary supply line (72.1).
  3. Coating system according to claims 1 or 2, characterized in that the primary supply line (68.1) is connected via the second pigging station (64.1) to a pig-free feed line (42.1), which in turn is connected to the application device (12).
  4. Coating system according to claim 3, characterized in that the pig-free feed line (42.1) is connected at the end located away from the second pigging station (64.1) to a supply reservoir (20.1), from which the application device (12) can be fed.
  5. Coating system according to claim 4, characterized in that the supply reservoir (20.1) is a piston doser (22.1).
  6. Coating system according to one of claims 1 to 5, characterized in that the second pigging station (64.1) of the primary supply line (68.1) comprises the secondary pigging station (80.1) of the secondary supply line (72.1).
  7. Coating system according to one of claims 1 to 6, characterized in that the application device (12) can be fed via a distributor (28) from a first supply branch (26.1) or a second supply branch (26.2), which can be connected to the material sources (52), wherein all further components according to claims 1 to 6 are separately provided for the first supply branch (26.1) and for the second supply branch (26.2).
EP15753318.3A 2014-09-04 2015-08-13 Coating system for coating objects Active EP3188844B1 (en)

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DE102014012872.5A DE102014012872A1 (en) 2014-09-04 2014-09-04 Coating system for coating objects
PCT/EP2015/001666 WO2016034265A1 (en) 2014-09-04 2015-08-13 Coating system for coating objects

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Publication number Priority date Publication date Assignee Title
JP2002126608A (en) 2000-08-18 2002-05-08 Nissan Motor Co Ltd Coating material supply device
DE10160136B4 (en) 2001-12-07 2005-03-24 Abb Patent Gmbh Arrangement and method for the automatic cleaning of a pipeline system
MXPA04010931A (en) 2002-05-07 2005-01-25 Behr Systems Inc Paint delivery and application system and method.
ES2259399T3 (en) 2002-05-07 2006-10-01 Durr Systems Gmbh PROCEDURE AND SYSTEM OF SUPPLY AND APPLICATION OF PAINTING.
DE10223498A1 (en) * 2002-05-27 2003-12-11 Duerr Systems Gmbh Process and system for supplying paint to an electrostatic coating system
CA2658686A1 (en) * 2006-12-27 2008-07-10 Abb K.K. Coating apparatus
DE112009004329T5 (en) 2008-12-23 2012-02-02 Abb Inc. Color shuttle system
EP2416890B2 (en) * 2009-04-08 2023-01-04 Fanuc Robotics America, Inc. Improved robotic painting system and method
US9126817B2 (en) * 2010-11-03 2015-09-08 Abb K.K. Paint replenishing apparatus for cartridge and paint replenishing method thereof
CN103301969B (en) * 2012-03-05 2016-06-29 本田技研工业株式会社 The middle accumulation device of electrostatic coating system, its cleaning method and spraying method

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Publication number Publication date
CN106470766B (en) 2019-10-25
EP3188844A1 (en) 2017-07-12
PL3188844T3 (en) 2019-05-31
CN106470766A (en) 2017-03-01
DE102014012872A1 (en) 2016-03-24
US20170274401A1 (en) 2017-09-28
WO2016034265A1 (en) 2016-03-10
US10384225B2 (en) 2019-08-20

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