EP1772194B1 - Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement - Google Patents
Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement Download PDFInfo
- Publication number
- EP1772194B1 EP1772194B1 EP06021045.7A EP06021045A EP1772194B1 EP 1772194 B1 EP1772194 B1 EP 1772194B1 EP 06021045 A EP06021045 A EP 06021045A EP 1772194 B1 EP1772194 B1 EP 1772194B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating agent
- storage tank
- piston
- supply device
- metering 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
Links
- 239000011248 coating agent Substances 0.000 title claims description 286
- 238000011017 operating method Methods 0.000 title description 6
- 238000010422 painting Methods 0.000 claims description 50
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- 238000005192 partition Methods 0.000 claims description 7
- 239000012777 electrically insulating material Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000003973 paint Substances 0.000 description 29
- 238000009413 insulation Methods 0.000 description 20
- 230000008859 change Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000000926 separation method Methods 0.000 description 6
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- 239000003795 chemical substances by application Substances 0.000 description 1
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Images
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
- 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
-
- 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
-
- 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
- B05B12/1409—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 the selection means being part of the discharge apparatus, e.g. part of the spray gun
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
- B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
- B05B5/1625—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom
- B05B5/1641—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 an additional container being provided downstream the intermediate container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
- B05B5/1675—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive the supply means comprising a piston, e.g. a piston pump
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- 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
- B05B12/1418—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 for supplying several liquids or other fluent materials in selected proportions to a single spray outlet
-
- 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
- B05B12/1463—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 containers for different materials to be sprayed being moved from a first location, e.g. a filling station, where they are fluidically disconnected from the spraying apparatus, to a second location, generally close to the spraying apparatus, where they are fluidically connected to the latter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0431—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with spray heads moved by robots or articulated arms, e.g. for applying liquid or other fluent material to 3D-surfaces
Definitions
- the invention relates to a coating agent supply device, in particular for a paint shop.
- WO 2004/037436 A1 is a multi-axis painting robot known, which has a rotary atomizer as an application device and can be used, for example, for painting automotive body panels.
- the supply of the paint to be applied takes place here by a piston dispenser, which is mounted on an arm of the painting robot and is at a high voltage potential, so that the applied by the rotary atomizer paint is electrically charged, resulting in a good order efficiency over the electrically grounded motor vehicle body parts or the other components to be painted.
- a color changer is still arranged, which is supplied via numerous color supply lines with paints of different colors, the color changer allows the selection of the desired color and supplies the piston dispenser with the associated paint.
- the color changer is at an electrical ground potential, so that the numerous color leads must not be made electrically insulating.
- the connection between the color changer and the piston dispenser is effected by an insulation tube having an electrical insulation between the color changer lying at ground potential and the piston dispenser for painting at high-voltage potential ensures.
- the electrical potential separation between the color changer and the piston dispenser is achieved by rinsing and cleaning the insulation tube.
- the piston dispenser must be refilled even without a color change when the entire filling volume of the piston dispenser has been applied by the rotary atomizer.
- the refilling of the piston dispenser by the color changer is also relatively time-consuming, which slows down the painting process.
- a painting robot is also known in which a metering pump and a color changer are arranged together in a robot arm of the painting robot, which is associated with the disadvantages mentioned above.
- the atomizer can be optionally connected to one of the two piston dispenser, while the other piston dispenser is filled.
- the selection of the desired piston meter takes place here by a complex turning mechanism.
- DE 691 09 823 T2 and DE 690 01 744 T2 is an electrostatic paint spraying system with two coating agent known, which are arranged one behind the other in the flow direction and separated by an insulating distance. The separation of the two coating agent tanks through the insulating section allows the downstream Coating agent tank to put during the application of paint at high voltage potential, while the upstream coating agent tank is at ground potential and therefore can be easily filled with paint. Further coating devices are known from DE 691 09 949 T2 . DE 195 24 853 C2 . DE 201 18 531 U1 . DE 199 61 270 A1 and DE 692 28 249 T2 , Furthermore, it should be noted on the prior art DE 101 03 067 A1 . EP 0 428 435 A .
- EP 0 487 378 A EP 0 467 626 A .
- EP 1 108 474 A US 4,313,475 A .
- GB 2 282 085 A JP 6 154666 A .
- the transfer from the coating agent storage container into the coating agent metering device can be done due to the short and direct connection with very large volume flow.
- the continuous filling of the coating agent storage container during painting also offers the advantage that due to the time available for filling relatively small paint volume flows in the supply lines (eg color ring lines and special paint supply) sufficient so that the associated lines a smaller Can have line cross-section, whereby the installation costs are reduced.
- a coating agent dosing or dosing preferably means a means by which the application device to be supplied on the coating device quantity (instantaneous flow) can be changed depending on demand, for example, depending on the particular workpiece area and other parameters during the coating, such as in EP 1 314 483 A2 or DE 691 03 218 T2 is explained.
- This possibility does not exist in known systems in which only by controlled adjustment of a piston, the filling volume of a container is set, such as at DE 690 01 744 T2 ,
- the coating agent metering device is preferably at a high-voltage potential, while the coating-material storage container is at a potential close to the earth (preferably ground potential), the coating-medium storage container being connected via an insulating path is connected to the coating agent dispenser to isolate the high voltage potential coating agent dispenser from the grounded coating agent storage container.
- the electrical potentials of the coating agent metering agent and the coating agent storage container are preferably switchable, so that the coating agent metering device is brought to high voltage potential only for painting, whereas the high voltage for filling the coating agent metering device can be switched off.
- the insulating section may in this case consist of an insulation tube in which a scraper (for example a stripping piston or a sealing head) is displaceable in order to remove residues of coating agent from the inner wall of the insulating section.
- a scraper for example a stripping piston or a sealing head
- this cleaning of the insulating section prevents the insulation capacity of the insulating section from being impaired by coating agent residues which have remained in the insulating section.
- contamination of the residual coating agent residues in the insulating section is avoided by cleaning the insulating section, which is particularly important in a color change.
- the movement of the scraper in the insulating distance in one direction or in both directions by a piston rod which can be driven, for example, electrically, pneumatically or hydraulically.
- the piston rod preferably consists of an electrically insulating material in order to achieve the desired insulation effect.
- a material for the piston rod is particularly suitable ceramic, since ceramic has a good electrical insulation capability and also has a high mechanical rigidity, which is important for the dosing accuracy. In addition, ceramic has a high Abrasion and wear resistance.
- the piston rod is made of steel. In this case, the scraper must be moved back with the piston rod for electrical isolation.
- the scraper is not firmly connected to the piston rod, but freely movable in the insulating section.
- the scraper can only be pushed in the Isolierrange of the piston rod. The movement of the scraper in the other direction, however, takes place by a one-sided pressurization of the scraper.
- the scraper in the Isolierzone is completely free to move, so that is dispensed with a piston rod to drive the scraper.
- the movement of the scraper is also done by a one-sided compressed air of the scraper on the desired side.
- the scraper can therefore be acted upon on both sides with compressed air.
- the scraper is moved in the one direction towards the coating agent metering device by means of compressed air, while the scraper with the remaining coating agent is pushed back by the coating agent metering device.
- connection between the coating agent storage container and the coating agent dosing is not permanent by an insulation tube, but by a detachable docking interface.
- this is then separated from the docking interface a potential close to the earth and is then separated from the coating agent supply line for filling the coating agent metering device and connected to the docking interface, wherein the coating agent storage container is then at the same high-voltage potential as the coating agent metering device.
- the coating agent storage container can thus be moved between the high-voltage potential of the coating agent metering device and the near-earth potential of the coating agent supply line.
- the connecting line between the coating agent storage container and the coating agent metering device consists of a piggable tube which is emptied by means of a pig after the transfer process (coating agent storage container ⁇ coating agent metering device). This is also the potential separation.
- the docking interface for the connection of the coating agent metering device with the coating agent storage container can in this case be mounted in the painting robot, for example in a robot arm, so that the docking interface with the painting robot is movable.
- a color changer can also be arranged in the painting robot.
- the coating agent storage container on an adjustable storage volume, wherein the storage volume is adjustable for example by a compressed air-operated piston.
- this offers the possibility that the new coating agent remaining in the coating agent storage container after filling of the coating agent metering device is pushed back from the coating agent storage container back into the coating agent supply line, which is also referred to as "reflow".
- this "reflow” reduces the coating agent consumption, since the new coating agent remaining in the coating agent storage container after the filling of the coating agent metering device can continue to be used.
- the cleaning of the coating agent storage container is facilitated thereby, so that less detergent is needed.
- the coating agent metering device is preferably a piston dispenser, as described, for example, in the document mentioned above WO 2004/037436 A1 is described.
- the content of this document is therefore the present description with regard to the structure and operation of a piston dispenser.
- the invention is not limited to piston dispensers with regard to the type of coating agent dispenser, but in principle can also be implemented with other types of dispensers.
- the coating agent storage container is preferably a cylinder with a storage piston which is displaceably arranged in the cylinder, wherein the drive of the storage piston can be carried out, for example, by an electric motor, hydraulically or pneumatically. The position of the storage piston then determines the storage volume of the coating agent storage container.
- the coating agent metering device and the coating agent storage container are integrated in a common cylinder.
- this variant of the common cylinder is separated by a centrally disposed in the cylinder partition wall into two sub-cylinders, wherein in one sub-cylinder of the metering of the coating agent metering device is displaceable, while in the other sub-cylinder of the storage piston of the coating agent storage container is displaceable.
- the drive of the metering piston is preferably carried out by a piston rod, while the drive of the accumulator piston is preferably carried out pneumatically.
- no dividing wall is arranged in the common cylinder.
- the storage volume of the coating agent storage container is in this case on the back of Dosierkolbens, wherein in this storage volume of the common cylinder of the accumulator piston is slidably disposed, the drive of the accumulator piston is preferably carried out pneumatically.
- the pneumatic pressure to drive the accumulator piston then acts not only on the accumulator piston, but also on the back of Dosierkolbens, so that the drive of the metering piston should be mechanically sufficiently rigid and therefore preferably takes place by a piston rod.
- the invention is particularly advantageous for the application of water-based paint, but the invention is not limited to water-based paint with respect to the coating agent to be applied, but in principle also feasible with other types of coating agents.
- FIG. 1 illustrated embodiment of a coating agent supply device according to the invention described, for example, on a robot arm of a painting robot can be arranged, as in the already mentioned above publication WO 2004/037436 A1 for a conventional coating agent supply device.
- the illustrated coating agent supply device has a coating agent metering device 1, which in this exemplary embodiment is a piston metering device.
- the coating agent metering device 1 has a cylinder 2 and a metering piston 3 displaceable in the cylinder 2 in the direction of the arrow, the drive of the metering piston 3 being effected mechanically by a push rod 4, which can be driven, for example, by an electric motor, pneumatically or hydraulically.
- a metering volume 5 which is adjustable by a displacement of the metering piston 3 in the cylinder 2.
- the metering volume 5 with the coating agent contained therein (eg water-based paint) is in operation at a high voltage potential, as symbolized by the high voltage symbol shown.
- the coating agent delivered by the coating agent supply device is therefore also at a high-voltage potential, which contributes to a good application efficiency in the case of an electrostatic coating.
- the metering volume 5 opposite side of the cylinder 2 and the push rod 4, however, is at a ground potential, as symbolized by the grounding sign also shown.
- a coating agent storage container 6 which consists essentially of a cylinder 7 and a displaceable in the cylinder 7 accumulator piston 8, wherein the accumulator piston 8 is pneumatically driven via a compressed air line 9 and thus an adjustable Storage volume 10 in the cylinder 7 includes.
- the entire coating agent storage container 6 is in this case at a ground potential, as symbolized by the grounding symbol.
- the supply of the coating agent storage container 6 is effected by a coating agent supply line 11, which opens into the storage volume 10 and emanates, for example, from a conventional color changer or a loop.
- a coating agent supply line 11 which opens into the storage volume 10 and emanates, for example, from a conventional color changer or a loop.
- the withdrawn volume flow also depends on the viscosity of the removed coating agent.
- a low viscosity of the coating agent leads to a relatively large volume flow from the loop.
- a high viscosity of the coating agent leads to a correspondingly low volume flow during removal.
- the viscosity of the coating agent is therefore preferably taken into account, so that the filling of the coating agent storage container 6 is always independent of the viscosity of the coating agent with a constant low flow rate.
- the filling of the coating agent storage container 6 is preferably carried out until the accumulator piston 8 abuts a predetermined stop, whereby the maintenance of a defined filling quantity is ensured.
- the pneumatic backpressure on the accumulator piston 8 is set at the beginning of a removal to a predetermined value and then not regulated.
- the back pressure is then not regulated, but increases with increasing filling of the coating agent storage container 6 accordingly, so that the back pressure is a measure of the degree of filling of the coating agent storage container 6.
- the back pressure is continuously measured.
- the filling of the coating agent storage container 6 is then terminated. At a defined initial volume flow at the beginning of the filling of the coating agent storage container 6 is filled in this way with a defined amount of the coating agent.
- the coating agent storage container 6 From the storage volume 10 of the coating agent storage container 6 further branches off an insulation tube 12, which opens into the metering volume 5 of the coating agent metering 1, wherein the insulation tube 12 in the deflated and cleaned state, the coating agent storage container 6 with respect to the coating agent metering device 1 electrically insulated , which in itself from the already mentioned document WO 2004/037436 A1 is known.
- the insulation tube 12 has a larger line cross-section than the coating supply line 11, so that the coating agent metering device 1 can be filled as quickly as possible from the coating agent storage container 6, as will be described in detail.
- the smaller line cross section of the coating agent supply line 11 is harmless, since the filling of the coating agent storage container 6 takes place during painting, so that sufficient time is available for the filling of the coating agent storage container 6.
- the lower cost of the smaller cross-section of the coating agent supply line 11 is advantageous since smaller lines can be used.
- FIGS. 2A and 2 B show an alternative embodiment of a coating agent supply device according to the invention, which is largely similar to that described above and in FIG. 1 corresponds to the embodiment shown, so that to avoid repetition of the above description FIG. 1 is referenced.
- a special feature of this exemplary embodiment is that the coating agent storage container 6 in this case is not permanently connected to the coating agent metering device 1 via the insulation tube 12. Instead, the coating agent storage container 6 is movable between two positions, which in the FIGS. 2A and 2 B are shown.
- FIG. 2A shown position of the coating agent storage container 6 is connected to the coating agent supply line 11, but separated from the coating agent metering device 1 and is then at an electrical ground potential. In this position, the filling of the coating agent storage container 6 takes place via the coating agent supply line 11.
- the coating agent storage container 6 is connected via a docking interface 13 with the coating agent metering device 1, but separated from the coating agent supply line 11 and then is at the same high voltage potential as the coating agent metering device 1. In this position, the transfer of the coating agent from the coating agent storage container 6 takes place in the coating agent metering device 1.
- the coating agent storage container 6 is first filled with the new coating agent via the coating agent supply line 11, the coating agent storage container 6 being separated from the docking interface 13, as in FIG FIG. 2A is shown. During this filling of the coating agent storage container 6, the coating agent dispenser 1 can continue to dose the old coating agent, so that no filling of the coating agent storage container 6 interrupting the painting process is required and therefore sufficient time for filling available.
- the coating agent storage container 6 After filling of the coating agent storage container 6, the coating agent storage container 6 is then connected after further intermediate steps with the docking interface 13, which in FIG. 2B is shown. After the connection with the docking interface 13 has been established, the new coating agent contained in the storage volume 7 can then be transferred into the metering volume 5 of the coating agent metering device 1.
- FIG. 3 shows a further embodiment of a coating agent supply device according to the invention, which partially with the above-described and in FIG. 1 shown embodiment, so that in order to avoid repetition partly to the above description FIG. 1 is referenced.
- a special feature of this exemplary embodiment is that the coating agent storage container 6 is integrated in the cylinder 2 of the coating agent metering device 1 on the rear side of the metering piston 3.
- a partition wall 14 is arranged in the cylinder 2, which separates the cylinder 2 into two sub-cylinders, wherein in the right in the drawing part cylinder of the accumulator piston 8 is compressed air actuated displaceable.
- FIG. 4 shows a modification of the embodiment according to FIG. 3 , so as to avoid repetition, to a large extent to the above description FIG. 3 is referenced.
- a special feature of this embodiment is that it dispenses with the partition wall 14 for the separation of the two partial cylinders.
- the compressed air for driving the accumulator piston 8 thus also acts on the back of the metering piston 3, which requires a mechanically sufficiently rigid drive of the metering piston 3.
- FIGS. 5A to 5J show a paint shop with a coating agent supply device according to the invention in different phases of a color change, the color change sequence in the flowchart in FIG. 6 is shown and will be described in detail later.
- the in the FIGS. 5A to 5J The painting system shown has the coating agent storage container 6 and the coating agent dosing device 1, the construction and functioning of which are described above with reference to FIG FIG. 1 has been described.
- the coating agent storage container 6 On the input side of the coating agent storage container 6 is connected via a valve assembly 15 with a color changer 16, wherein the color changer 16 may be carried out conventionally, as for example in the document DE 103 35 358 A1 is described.
- the coating agent metering device 1 On the output side, the coating agent metering device 1 is connected via a further valve arrangement 17 with a rotary atomizer 18, wherein from the rotary atomizer 18 a return line 19 goes off, can be rinsed on the remaining coating agent.
- Another return line 20 is derived from the valve assembly 15, wherein on the return line 20 also remaining coating agent can be removed.
- 5A first shows the normal painting operation when the coating agent metering device 1 is still filled with the old coating agent and doses this to the rotary atomizer 18.
- the rotary atomizer 18 and the coating agent doser 1 are then at a high voltage potential to enable electrostatic component coating.
- For electrical insulation of the coating agent metering device 1 relative to the coating agent storage container 6 of the insulation tube is then cleaned and emptied, causing a potential separation.
- the coating agent storage container 6, however, is initially still empty, with only a relatively low pressure of 2 bar is applied to the accumulator piston 8 via the compressed air line 9. over the color changer 16 and the valve assembly 15, the coating agent storage container 6 is therefore already filled during the painting process with the new coating agent.
- the high voltage on the rotary atomizer 18 and the coating agent metering device 1 is then turned off and the old paint remaining in the coating agent metering device 1 is expressed via the return line 19, which is shown in FIG. 5B is shown.
- the coating agent dispenser 1 After expressing the old paint remaining in the coating agent dispenser 1, the coating agent dispenser 1 is then rinsed together with the rotary atomizer 18 and the insulation tube 12, which is shown in FIG. 5C is shown.
- valve assembly 15 then opens the connection between the coating agent storage container 6 and the coating agent metering device 1, so that the coating agent metering device 1 and the main line are pressed with the new color.
- the ink still contained in the insulation tube 12 is then taken up in the coating agent metering device 1, which is shown in FIG. 5F.
- This emptying of the insulation tube 12 is important so that the insulation tube 12 then during the painting then the high voltage potential lying coating agent metering device 1 electrically against the coating agent storage container 6 can isolate.
- the coating agent storage container 6 is then rinsed together with the valve arrangement 15 and the color changer 16, in order then to allow a filling with a new color without contamination by paint residues.
- FIG. 7 shows an alternative embodiment of an operating method according to the invention, which is largely similar to that described above and in FIG. 6 illustrated embodiment, so that reference is made to avoid repetition of the above description.
- a special feature of this embodiment is that the so-called "reflow" according to FIG. 5I eliminated.
- no coating agent is pressed back into the coating agent supply line 11 from the coating agent storage container 6.
- This is made possible by the fact that during the filling of the coating agent storage container 6 according to FIG. 5A, exactly the required amount of ink is filled in, which can be checked by a sensor.
- This embodiment is particularly suitable for painting with water-based paint and direct charging.
- FIG. 8 shows an alternative embodiment of an operating method according to the invention, which is largely similar to that described above and in FIG. 6 illustrated embodiment, so that reference is made to avoid repetition of the above description.
- the painting is done with water paint and external charging and "reflow".
- the external charging offers over the direct charging of the coating agent the advantage that the ventilation of the insulating section 12 (see. FIG. 5G ) can be omitted, since the insulation capacity of the insulating section 12 is required only in a direct charging of the coating composition.
- FIG. 9 shows an alternative embodiment of an operating method according to the invention, which is largely similar to that described above and in FIG. 6 illustrated embodiment, so that reference is made to avoid repetition of the above description.
- FIG. 10 shows a simplified representation of a painting robot 21 with a non-inventive coating agent supply device, which largely coincides with the coating agent supply devices described above, so reference is made to avoid repetition of the above description.
- the coating agent metering device 1 is embodied here as a piston dispenser and integrated into an atomizer 22, which is mounted on a hand axis 23 and is guided by a highly mobile robot arm 24.
- the coating agent storage container 6 is arranged stationarily outside the painting robot 21 and can be connected to the coating agent metering device 1 via the docking interface 13.
- the painting robot 21 moves the atomizer 22 so that the docking interface 13 docks onto the coating agent storage container 6, whereupon the coating agent metering device 1 can be filled from the coating agent storage container 6.
- the drawing shows an alternative variant in which the dashed line coating agent metering 1 is integrated into the robot arm 24.
- FIG. 11 painting robot 21 shown partially in accordance with the above-described and in FIG. 10 shown painting robot 21 match, so reference is made to avoid repetition of the above description, wherein the same reference numerals are used for corresponding components.
- the coating agent metering device 1, the coating agent storage container 6 and a color changer 25 are integrated into the robot arm 24, wherein the color changer 25 without an insulating section directly to the front of the coating agent storage container 6 and the coating agent metering device 1 is grown.
- the painting robot 21 is used in this embodiment for the application of a high-resistance 1-component solvent-based paint with an electrical direct charging of the paint or for painting without high voltage (pure high-rotation sputtering).
- FIG. 12 shown painting robot 21 is largely consistent with that described above and in FIG. 11 shown painting robot 21, so that reference is made to avoid repetition of the above description, wherein the same reference numerals are used for corresponding components.
- a special feature of the painting robot 21 is that 2-component solvent-based paint is applied with direct electrical charging, wherein the one coating component is metered by the coating agent metering device 1, while the other paint component is metered by a piston dispenser 26 via a hose line 27.
- the additional piston dispenser 26 is in this case arranged stationarily outside the painting robot 21.
- FIG. 13 shows a simplified representation of an insulating section 28, instead of in the Figures 5A-5J shown insulation tube 12 can be used.
- the insulating section 28 consists essentially of an electrically non-conductive tube 29 which extends between the two valve assemblies 15 and 17.
- a Abstreifkolben 30 is linearly displaceable, wherein the drive of the Abstreifkolbens 30 is effected by a piston rod 31, at the end of a drive piston 32 is fixed.
- the drive piston 32 is slidably guided in a pressure cylinder 33, wherein in the pressure cylinder 33 on both sides of the drive piston 32 two compressed-air ports 34, 35 open, via which the drive piston 32 can be pressurized on one side with compressed air to the drive piston 32 with the piston rod 31 and the Abstreifkolben 30 to move.
- the displacement of the stripping piston 3 serves to scrape coating agent residues on the inner wall of the tube 29 in order to achieve the desired electrical insulation capacity of the insulating section.
- the stripping off of the color residues from the inner wall of the tube 29 during a color change prevents contamination by residual color.
- the coating agent is thereby transferred in the earthed state via an inlet A and an outlet B, wherein the stripping piston 30 is in its rest position, the in FIG. 13 is shown.
- the coating agent remaining in the tube 29 is then pushed out of the tube 29 by the advancing stripping piston 30.
- the piston rod 31 is made of an electrically conductive material, the piston rod 31 is then withdrawn from the tube 29 before switching on the electrical voltage for the coating agent charging.
- the piston rod 31 is made of an electrically insulating material, the piston rod 31 remains in the advanced state when the voltage is turned on and is pulled back only after the voltage has been switched off. This is advantageous because the retraction of the stripping piston 30 can lead to streaking on the inner wall of the tube 29, whereby the insulation capacity is impaired.
- FIG. 14 shows an alternative embodiment of an insulating section, which is largely with the above-described and in FIG. 13 illustrated embodiment, so reference is made to avoid repetition of the above description, wherein the same reference numerals are used for corresponding components.
- a peculiarity of this embodiment is that the stripping piston 30 is not fixedly connected to the piston rod 31, so that the piston rod 31 can push the stripping piston 30 in one direction only, i. in the drawing to the left.
- FIG. 15 shows an alternative embodiment of an insulating section, which is largely with the above-described and in FIG. 14 illustrated embodiment, so reference is made to avoid repetition of the above description, wherein the same reference numerals are used for corresponding components.
- a special feature of this embodiment is that the stripping piston 30 is pneumatically driven in both directions, for which purpose an additional compressed air port 37 opens into the tube, so that the drive piston 30 can be acted upon on both sides with compressed air. This offers the advantage that it is possible to dispense with the piston rod 31 for driving the stripping piston 30.
Claims (15)
- Dispositif d'alimentation en produit de revêtement, plus particulièrement pour une installation de peinture, aveca) un dispositif de dosage de produit de revêtement (1) qui dose un produit de revêtement à appliquer vers un appareil d'application etb) un réservoir de produit de revêtement (6) pour le logement provisoire du produit de revêtement et pour l'alimentation du dispositif de dosage de produit de revêtement (1) en produit de revêtement, le réservoir de produit de revêtement (6) étant disposé en amont avant le dispositif de dosage de produit de revêtement (1) et étant relié côté sortie avec le dispositif de dosage de produit de revêtement (1),caractérisé en ce quec) le dispositif de dosage de produit de revêtement (1) et le réservoir de produit de revêtement (6) étant disposés dans un ou plusieurs bras robotiques (24) d'un robot de peinture (21) ou dans un pulvérisateur (22) guidé par le robot de peinture (21).
- Dispositif d'alimentation en produit de revêtement selon la revendication 1, caractérisé en ce quea) le réservoir de produit de revêtement (6) est relié au dispositif de dosage de produit de revêtement (1) par l'intermédiaire d'un tronçon d'isolation (12) et/oub) le tronçon d'isolation (28) comprend une conduite (12, 29) dans laquelle un racleur (30) ou un écouvillon coulisse, afin d'éliminer les restes de produit de revêtement dans la conduite (12, 29) et/ouc) le racleur (30) est entraîné par une tige de piston (31) et/oud) la tige de piston (31) est constituée d'un matériau électriquement isolant.
- Dispositif d'alimentation en produit de revêtement selon l'une des revendications précédentes, caractérisé en ce que le dispositif de dosage de produit de revêtement (1) se trouve au moins temporairement à un potentiel de haute tension, tandis que le réservoir de produit de revêtement (6) se trouve à un potentiel proche de la terre.
- Dispositif d'alimentation en produit de revêtement selon la revendication 3, caractérisé en ce que le réservoir de produit de revêtement (6) peut être déplacé entre le potentiel de haute tension et le potentiel proche de la terre.
- Dispositif d'alimentation en produit de revêtement selon l'une des revendications précédentes, caractérisé par une interface d'accueil (13) pour la liaison amovible du dispositif de dosage de produit de revêtement (1) avec le réservoir de produit de revêtement (6).
- Dispositif d'alimentation en produit de revêtement selon l'une des revendications précédentes, caractérisé en ce que le réservoir de produit de revêtement (6) présente une capacité (10) réglable.
- Dispositif d'alimentation en produit de revêtement selon la revendication 6, caractérisé en ce que la capacité (10) du réservoir de produit de revêtement (6) peut être réglée à l'aide d'un piston (8).
- Dispositif d'alimentation en produit de revêtement selon la revendication 7, caractérisé en ce que le piston (8) du réservoir de produit de revêtement (6) est entraîné de manière pneumatique ou hydraulique.
- Dispositif d'alimentation en produit de revêtement selon l'une des revendications précédentes, caractérisé en ce que le dispositif de dosage de produit de revêtement (1) est un dispositif de dosage à piston qui comprend un cylindre (2) et un piston de dosage (3) coulissant dans le cylindre (2).
- Dispositif d'alimentation en produit de revêtement selon la revendication 9, caractérisé en ce que le réservoir de produit de revêtement (6) se trouve dans le cylindre (2) sur la face arrière du piston de dosage (3), la capacité (10) pouvant être réglée par un piston de réservoir (8) coulissant dans le cylindre (2).
- Dispositif d'alimentation en produit de revêtement selon la revendication 10, caractérisé en ce que le cylindre (2) comprend une cloison (14) qui sépare le dispositif de dosage de produit de revêtement (1) du réservoir de produit de revêtement (6).
- Dispositif d'alimentation en produit de revêtement selon l'une des revendications précédentes, caractérisé en ce que le réservoir de produit de revêtement (6) comprend une conduite d'alimentation (11) avec une section de conduite inférieure à celle du dispositif de dosage de produit de revêtement (1).
- Dispositif d'alimentation en produit de revêtement selon l'une des revendications précédentes, caractérisé en ce quea) pour le revêtement avec différents produits de revêtement, un changeur de couleur (25) est prévu, qui est relié côté sortie avec le réservoir de produit de revêtement (6),b) le changeur de couleur (25) est disposé conjointement avec le dispositif de dosage de produit de revêtement (1) et le réservoir de produit de revêtement (6) dans le robot de peinture (21).
- Dispositif d'alimentation en produit de revêtement selon la revendication 13, caractérisé en ce que le changeur de couleur (25) est relié sans tronçon d'isolation avec le réservoir de produit de revêtement (6) et le dispositif de dosage de produit de revêtement (1).
- Installation de peinture avec un dispositif d'alimentation en produit de revêtement selon l'une des revendications précédentes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14002527.1A EP2810719B1 (fr) | 2005-10-07 | 2006-10-06 | Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005048223A DE102005048223A1 (de) | 2005-10-07 | 2005-10-07 | Beschichtungsmittel-Versorgungseinrichtung und zugehöriges Betriebsverfahren |
DE102005060959A DE102005060959A1 (de) | 2005-10-07 | 2005-12-20 | Beschichtungsmittel-Versorgungseinrichtung und zugehöriges Betriebsverfahren |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14002527.1A Division EP2810719B1 (fr) | 2005-10-07 | 2006-10-06 | Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement |
EP14002527.1A Division-Into EP2810719B1 (fr) | 2005-10-07 | 2006-10-06 | Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1772194A2 EP1772194A2 (fr) | 2007-04-11 |
EP1772194A3 EP1772194A3 (fr) | 2008-09-17 |
EP1772194B1 true EP1772194B1 (fr) | 2019-01-09 |
Family
ID=37564099
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14002527.1A Revoked EP2810719B1 (fr) | 2005-10-07 | 2006-10-06 | Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement |
EP06021045.7A Active EP1772194B1 (fr) | 2005-10-07 | 2006-10-06 | Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14002527.1A Revoked EP2810719B1 (fr) | 2005-10-07 | 2006-10-06 | Dispositif d'alimentation pour un agent de revêtement et correspondant procédé de fonctionnement |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP2810719B1 (fr) |
DE (1) | DE202006021283U1 (fr) |
ES (2) | ES2717116T3 (fr) |
HU (1) | HUE043560T2 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8020784B2 (en) | 2005-10-07 | 2011-09-20 | Durr Systems Inc. | Coating material supply installation and associated operating procedure |
RU2427432C2 (ru) | 2006-12-12 | 2011-08-27 | Дюрр Системз Гмбх | Устройство для нанесения покрытий с дозировочным устройством |
DE102007029195A1 (de) | 2007-06-25 | 2009-02-19 | Dürr Systems GmbH | Beschichtungseinrichtung mit einer Dosiervorrichtung |
DE102020104325A1 (de) * | 2020-02-19 | 2021-08-19 | Dürr Systems Ag | Spülvorrichtung zum Verbinden mit einem Applikationsmittel-Hauptkanal eines Applikationsmittelwechslers |
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Also Published As
Publication number | Publication date |
---|---|
EP2810719B1 (fr) | 2018-06-20 |
HUE043560T2 (hu) | 2019-08-28 |
EP1772194A2 (fr) | 2007-04-11 |
ES2717116T3 (es) | 2019-06-19 |
ES2685244T3 (es) | 2018-10-08 |
EP2810719A1 (fr) | 2014-12-10 |
DE202006021283U1 (de) | 2014-08-27 |
EP1772194A3 (fr) | 2008-09-17 |
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