EP2806978B1 - Lackierkabine mit einer beschichtungsmittelleitung und entsprechendes herstellungsverfahren für die beschichtungsmittelleitung - Google Patents

Lackierkabine mit einer beschichtungsmittelleitung und entsprechendes herstellungsverfahren für die beschichtungsmittelleitung Download PDF

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Publication number
EP2806978B1
EP2806978B1 EP13702743.9A EP13702743A EP2806978B1 EP 2806978 B1 EP2806978 B1 EP 2806978B1 EP 13702743 A EP13702743 A EP 13702743A EP 2806978 B1 EP2806978 B1 EP 2806978B1
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EP
European Patent Office
Prior art keywords
coating agent
line
booth
potential
compensating element
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
EP13702743.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2806978A1 (de
Inventor
Andreas Collmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Publication of EP2806978A1 publication Critical patent/EP2806978A1/de
Application granted granted Critical
Publication of EP2806978B1 publication Critical patent/EP2806978B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B05B5/1616—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/40—Construction elements specially adapted therefor, e.g. floors, walls or ceilings
    • 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
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/10—Arrangements for supplying power, e.g. charging power
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S901/00—Robots
    • Y10S901/30—End effector
    • Y10S901/41—Tool
    • Y10S901/43—Spray painting or coating

Definitions

  • the invention relates to a painting booth having a coating agent line for passing a coating agent, in particular in a painting installation with an electrostatic coating agent charge. Furthermore, the invention relates to a corresponding manufacturing method for producing such a coating agent line.
  • an electrostatic coating agent charge consists of a so-called direct charging, in which the coating itself is electrostatically charged and therefore already has a high electrical potential in the coating medium lines within the application technology (for example atomizers, etc.).
  • the actual painting is done here usually by painting robot within a paint booth, the painting robots are supplied by coating agent lines with the paint to be applied. These coating media lines lead from a color supply located outside the paint booth to the atomizer on the painting robot, wherein the painting robot also carries a high voltage cascade to electrostatically charge the paint to be applied.
  • the high voltage required for the electrostatic coating agent charging inside the spray booth generally entails a risk potential, so that a fire protection device (eg sprinkler system, CO 2 extinguishing system, fire protection sensor) is installed inside the spray booth, which can intervene in case of fire to prevent the high voltage of the electrostatic coating of the coating causes fire or other damage.
  • a fire protection device eg sprinkler system, CO 2 extinguishing system, fire protection sensor
  • these conventional paint shops usually have a grounding interface, which is arranged within the paint booth or at least on the cabin wall and the coating agent lines grounded there electrically. This prevents the high voltage potential applied to the coating agent line within the paint booth from passing outward along the coating medium line, which could lead to a fire or other disturbance there. This is all the more remarkable because the fire protection device is disposed within the spray booth and therefore can only access those high-voltage incidents that occur within the spray booth.
  • the above-mentioned conventional grounding interfaces for coating lines usually have so-called grounding bulkheads, which are associated with various disadvantages.
  • grounding interfaces require a large number of hose connections, via which the electrostatically charged coating agent connects to the Each grounding robot may require up to 56 hose fittings.
  • the grounding wire is therefore selectively pushed in this document to an optimum point within the coating agent line in order to achieve optimum electrical resistance of the liquid column.
  • This optimal point can be inside the paint booth or outside the paint booth.
  • the invention is therefore based on the object to provide an improved way for electrical grounding of a coating agent line in a paint booth.
  • the invention comprises a complete painting booth for coating components, in particular for painting motor vehicle body components, wherein the painting booth has a coating agent line which supplies an application device (for example rotary atomizer) located inside the painting booth with the coating agent to be applied.
  • an application device for example rotary atomizer
  • the coating agent line is in this case passed through a cabin wall of the paint booth from a cabin exterior in a cabin interior, wherein a potential equalization element extends within the coating medium line from the cabin exterior through the cabin wall, so that the free end of the equipotential bonding element and thus the starting point of the grounding interface in the Cabin interior is located.
  • the invention provides a coating medium line (eg hose line), which is suitable for passing a coating agent (eg paint) in a coating plant, in particular in a paint shop with an electrostatic coating agent charge.
  • the coating agent line according to the invention in accordance with the prior art, has a hollow conduit interior for passing the coating agent and a conduit wall surrounding the hollow conduit interior.
  • the coating agent line according to the invention has an electrically conductive equipotential bonding element (eg a grounding element) in order to electrically connect the coating agent (eg paint) located in the hollow line interior of the coating agent line to a reference potential (eg ground or ground potential), the potential equalization element extends in the axial direction along the coating agent line.
  • the equipotential bonding element is not integrated into the conduit wall of the coating agent line, but arranged in the conduit interior separately from the conduit wall.
  • the equipotential bonding element (eg grounding element) is elongate and connected at one end to the reference potential (eg earth or ground potential) and projects axially with its opposite free end into the line interior of the coating agent line.
  • the equipotential bonding element according to the invention is thus preferably lance-shaped and can therefore also be referred to as a grounding lance.
  • the electrically grounded equipotential bonding member projects with its free end in the flow direction into the coating agent conduit so that the coating agent column is electrically grounded upstream of the free end of the equipotential bonding element whereas the voltage of the coating agent in the coating agent column is substantially downstream of the free end of the equipotential bonding element increases linearly to the distance from the free end of the equipotential bonding element.
  • the free end of the potential equalization element thus forms a starting point of the grounding interface according to the invention and should therefore remain as possible at a constant position during operation. In operation, however, different forces can act on the free end of the equipotential bonding element and thereby cause a shift of the free end of the equipotential bonding element.
  • the equipotential bonding element according to the invention is preferably designed such that the axial length of the equipotential bonding element is independent of the flow direction of the coating agent of the coating agent line.
  • the equipotential bonding element is preferably non-compressible in the axial direction, i. the equipotential bonding element is preferably substantially rigid in the axial direction.
  • the coating agent line is usually passed through a highly mobile painting robot and is therefore subjected to dynamic bending during operation, which also applies to the potential compensation element located in the coating medium line.
  • the equipotential bonding element is therefore preferably flexible, in particular flexurally elastic.
  • the potential equalization element in the preferred embodiment of the invention consists of an electrically conductive material.
  • the equipotential bonding element is massively made of an electrical material.
  • the potential equalization element consists of any material which may also be electrically insulating, wherein the equipotential bonding element is then provided at least with an electrically conductive coating.
  • the equipotential bonding element in the preferred embodiment consists of a solvent-resistant and paint-resistant material, since the equipotential bonding element is exposed during operation to solvents and paints.
  • the equipotential bonding element can therefore be made of stainless steel (VA steel).
  • the equipotential bonding element extends only over part of the length of the coating agent line, since the coating agent column within the coating agent line is not to be electrically grounded on the high voltage side of the coating agent line.
  • the potential equalization element over a length of more than 50 cm, 1 m, 1.50 m, 2 m and / or over a length of less than 10 m, 9 m, 8 m, 7 m, 6 m, 5 m , 4 m or 3 m.
  • Decisive for the extension of the equipotential bonding element within the scope of the invention is the desired position of the starting point of the grounding interface, ie the free end of the equipotential bonding element.
  • the starting point of the grounding interface should be within the spray booth, since only then located within the spray booth fire protection device can engage in a high-voltage incident.
  • the starting point of the grounding interface should be outside the spray booth, additional fire protection equipment would be required outside the spray booth.
  • the equipotential bonding element is thus cut to length so that the free end of the equipotential bonding element is located inside the paint booth.
  • the equipotential bonding element is simply a wire that protrudes into the coating medium line.
  • Another possibility for the technical realization of the equipotential bonding element consists of a helical spiral which projects into the coating medium line.
  • the invention is not limited to the two aforementioned examples with regard to the technical realization of the equipotential bonding element.
  • the coating agent line itself, it should be mentioned that the coating agent line is preferably flexible, in particular flexurally elastic.
  • the coating agent line according to the invention may therefore be a conventional coating agent tube, as is known per se from the prior art and therefore does not need to be described in detail.
  • the conduit wall of the coating agent line according to the invention can be partially or completely made of an electrically insulating material around the inside of the conduit to isolate electrically located and partially electrostatically charged coating agent to the outside.
  • conduit wall of the coating agent line in the preferred embodiment of the invention consists, at least in its interior, of a solvent-resistant and paint-resistant material, which of course is self-evident.
  • the potential equalization element according to the invention is preferably a grounding element, wherein the reference potential is a ground potential or a ground potential.
  • the invention also claims protection for corresponding coating agent lines in which the equipotential bonding element charges the coating agent within the coating medium line to a different reference potential, for example to a high-voltage potential.
  • a ground-side connection element is additionally provided, which is electrically grounded and connected to the coating medium line on the ground side.
  • a voltage-side connection element is preferably provided which is at a high-voltage potential and connected to the high-voltage side of the coating agent line.
  • connection between the connection elements and the coating agent line can be done for example by a screw, as for example from the patent application DE 103 13 063 A1 are known.
  • the coating agent line according to the invention offers the possibility of flexibly arranging the starting point of the grounding interface within the paint booth.
  • the painting booth according to the invention preferably has an electrostatic coating agent charge which charges the coating agent electrostatically by direct charging, which is known per se from the prior art and therefore does not need to be described in detail.
  • the paint booth according to the invention preferably comprises a fire protection device which is installed in the cabin interior of the spray booth, in particular with a sprinkler system, a carbon dioxide extinguishing system and / or a fire protection sensor.
  • the painting of the components in the painting booth is preferably carried out by a conventional painting robot having a plurality of movable robot members, the coating agent pipe being guided by the moving robot members to the application apparatus (e.g., rotary atomizer).
  • the application apparatus e.g., rotary atomizer
  • the invention also encompasses a corresponding production method for the coating medium line according to the invention described above.
  • the production method according to the invention is initially distinguished by the fact that the electrically conductive equipotential bonding element is inserted into the hollow conductor interior of the coating agent line.
  • the production method according to the invention provides that the equipotential bonding element is cut to length is that the free end of the equipotential bonding element and thus the starting point of the grounding interface is located within the spray booth.
  • FIGS. 1 and 4 show a coating agent line 1, which can be used in a paint shop for painting automotive body components to direct the paint to be applied from a paint supply 2 to a rotary atomizer 3.
  • the rotary atomizer 3 is hereby guided in a conventional manner by a multi-axis painting robot 4 which has a robot hand axis 5, two robot arms 6, 7 and a rotatable robot member 8, wherein the robot member 8 can be moved along a travel rail 9 at right angles to the plane of the drawing.
  • the painting robot 4 is in this case arranged in a cabin interior of a spray booth, whereas the paint supply 2 is located in a cabin exterior of the spray booth.
  • the coating agent line 1 is therefore passed through a cabin wall 10 of the paint booth, wherein the cabin wall 10 separates the cabin interior from the cabin exterior, which is known per se from the prior art.
  • a high voltage cascade 11 is mounted to electrostatically charge the paint to be applied by direct charging, which is known per se from the prior art.
  • the coating agent line 1 consists essentially of a largely conventional tube 12, a ground-side connection element 13, a voltage-side connection element 14 and a lance-shaped grounding element 15, which protrudes axially into the tube 12 from the ground-side connection element 13.
  • the voltage-side connection element 14 is connected by a connecting element to the hose 12, wherein the connecting element, for example, according to the patent application DE 103 13 063 A1 can be trained. It should also be mentioned that the voltage-side connection element 14 is connected to the high-voltage cascade 11 and is therefore charged to the electrostatic charging voltage.
  • the ground-side connecting element 13 is likewise connected to the hose 12 by a connecting element, whereby this connecting element can also be designed in the manner mentioned above.
  • the ground-side connection element 13 is electrically grounded.
  • the grounding element 15 in this case consists of an electrically conductive, flexurally elastic wire, which is connected at its one end to the ground-side connection element 13 and projects axially into the tube 12.
  • the hose 12 is divided into a high-voltage side hose portion 16 and a low-side hose portion 17, wherein the paint column in the ground-side hose portion 17 is electrically grounded upstream of a free end 18 of the ground member 15, whereas the voltage in the voltage-side hose portion 16 is electrically grounded End 18 of the grounding element 15, starting linearly increases in the flow direction, as in FIG. 3 is shown.
  • the electrical voltage U at a point x2 corresponding to the voltage-side connection element 14 U U ESTA .
  • the voltage U of the paint column in the hose section 16 therefore increases linearly in the flow direction.
  • grounding element 15 is cut to length so that the free end 18 of the grounding element 15 and thus the starting point of the grounding interface is located inside the cabin interior. This is important because only a fire protection device is located inside the cabin interior, whereas additional fire protection devices should be dispensed with in the cabin exterior space. This is made possible by the grounding element 15 ensuring that the paint column outside the paint booth is electrically grounded.
  • the coating medium line has an electrically grounded line section 19 and one in operation at high voltage potential line section 20.
  • FIG. 2 shows a modification of the embodiment according to FIG. 1 , this embodiment being largely the same as the embodiment described above, so that reference is made to the above description to avoid repetition, the same reference numerals being used for corresponding details.
  • a grounding element 15 ' is provided in the form of a wire helix.
  • both the grounding element 15 according to FIG. 1 as well as the grounding element 15 'according to FIG. 2 have in common that the axial length of the grounding element 15 or 15 'remains substantially constant during operation. This is important so that the free end 18 of the grounding element 15 or 15 'remains in operation, as far as possible, at a constant location within the painting booth, independently of the movements of the painting robot 4 and of the flow direction in the coating line 1. In any case, it must be prevented that the free end 18 of the grounding element 15 or 15 'shifts so that the free end 18 is then outside the spray booth, since then a fire protection device would be required outside of the spray booth.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
EP13702743.9A 2012-01-27 2013-01-25 Lackierkabine mit einer beschichtungsmittelleitung und entsprechendes herstellungsverfahren für die beschichtungsmittelleitung Active EP2806978B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012001563.1A DE102012001563B4 (de) 2012-01-27 2012-01-27 Lackierkabine mit einer Beschichtungsmittelleitung und entsprechendes Herstellungsverfahren für die Beschichtungsmittelleitung
PCT/EP2013/000226 WO2013110466A1 (de) 2012-01-27 2013-01-25 Lackierkabine mit einer beschichtungsmittelleitung und entsprechendes herstellungsverfahren für die beschichtungsmittelleitung

Publications (2)

Publication Number Publication Date
EP2806978A1 EP2806978A1 (de) 2014-12-03
EP2806978B1 true EP2806978B1 (de) 2019-01-23

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ID=47666085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13702743.9A Active EP2806978B1 (de) 2012-01-27 2013-01-25 Lackierkabine mit einer beschichtungsmittelleitung und entsprechendes herstellungsverfahren für die beschichtungsmittelleitung

Country Status (11)

Country Link
US (1) US10137463B2 (zh)
EP (1) EP2806978B1 (zh)
CN (1) CN104136132B (zh)
BR (1) BR112014018283B1 (zh)
DE (1) DE102012001563B4 (zh)
ES (1) ES2718649T3 (zh)
MX (1) MX368260B (zh)
MY (1) MY174026A (zh)
RU (1) RU2612715C2 (zh)
WO (1) WO2013110466A1 (zh)
ZA (1) ZA201405923B (zh)

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US11232244B2 (en) * 2018-12-28 2022-01-25 Dassault Systemes Americas Corp. Simulation of robotic painting for electrostatic wraparound applications

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Also Published As

Publication number Publication date
ES2718649T3 (es) 2019-07-03
MY174026A (en) 2020-03-04
RU2612715C2 (ru) 2017-03-13
MX368260B (es) 2019-09-25
WO2013110466A1 (de) 2013-08-01
DE102012001563A1 (de) 2013-08-01
DE102012001563B4 (de) 2019-05-09
US10137463B2 (en) 2018-11-27
BR112014018283A8 (pt) 2017-07-11
ZA201405923B (en) 2016-08-31
MX2014008962A (es) 2015-03-19
CN104136132B (zh) 2018-04-13
BR112014018283B1 (pt) 2020-11-24
EP2806978A1 (de) 2014-12-03
BR112014018283A2 (zh) 2017-06-20
US20150017340A1 (en) 2015-01-15
CN104136132A (zh) 2014-11-05
RU2014134811A (ru) 2016-03-20

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