EP3689474B1 - Dispositif de revêtement et procédé de fonctionnement associé - Google Patents

Dispositif de revêtement et procédé de fonctionnement associé Download PDF

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Publication number
EP3689474B1
EP3689474B1 EP20164222.0A EP20164222A EP3689474B1 EP 3689474 B1 EP3689474 B1 EP 3689474B1 EP 20164222 A EP20164222 A EP 20164222A EP 3689474 B1 EP3689474 B1 EP 3689474B1
Authority
EP
European Patent Office
Prior art keywords
coating agent
coating
nozzle
jet
filter
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
EP20164222.0A
Other languages
German (de)
English (en)
Other versions
EP3689474A1 (fr
Inventor
Hans-Georg Fritz
Benjamin WÖHR
Marcus Kleiner
Moritz BUBEK
Timo Beyl
Frank Herre
Steffen Sotzny
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 EP3689474A1 publication Critical patent/EP3689474A1/fr
Application granted granted Critical
Publication of EP3689474B1 publication Critical patent/EP3689474B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/082—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to a condition of the discharged jet or spray, e.g. to jet shape, spray pattern or droplet size
    • 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
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
    • 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
    • B05B15/40—Filters located upstream of the spraying outlets
    • 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
    • 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
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
    • B05B15/531—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using backflow
    • 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
    • B05B15/58—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter preventing deposits, drying-out or blockage by recirculating the fluid to be sprayed from upstream of the discharge opening back to the supplying means
    • 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
    • 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

Definitions

  • the invention relates to a coating device for coating components with a coating agent, in particular for painting motor vehicle body components.
  • the invention also relates to an associated operating method for such a coating device.
  • rotary atomizers are usually used as application devices, but these have the disadvantage of a limited application efficiency, i.e. only part of the applied paint is deposited on the components to be coated, while the rest of the applied paint has to be disposed of as a so-called overspray.
  • print heads as application devices, as they are, for example DE 10 2013 002 412 A1 , US 9 108 424 B2 and DE 10 2010 019 612 A1 are known.
  • print heads do not emit a spray mist of the paint to be applied, but a spatially narrowly limited paint jet that is almost completely reflected on the component to be painted, so that almost no overspray occurs.
  • Such print heads generally have nozzles with a very small nozzle diameter of less than 500 ⁇ m or even less than 100 ⁇ m.
  • such small nozzles can easily become clogged or even completely clogged during operation.
  • individual paint particles can initially be in the nozzle, which initially only negatively affect the otherwise laminar flow of coating agent, for example by causing turbulence. In the event of further deposition of paint particles, the nozzle can then become completely clogged.
  • the prior art also includes U.S. 4,894,252 A , U.S. 4,668,948 A , WO 03/062129 A2 , US 2008/309698 A1 , DE 10 2007 018877 A1 and DE 32 25 554 A1 .
  • the invention is therefore based on the object of creating a correspondingly improved coating device.
  • the coating device according to the invention is used to coat components with a coating agent, in particular for painting motor vehicle body components.
  • the components to be coated therefore do not necessarily have to be motor vehicle body components. Rather, the coating device according to the invention can also be used to coat other types of components.
  • the coating agent is preferably a lacquer, such as, for example, a basecoat, a clear lacquer, a water-based lacquer or a solvent-based lacquer.
  • the coating device can also be designed for the application of other coating agents, such as, for example, for the application of adhesives, insulating materials, sealants, primers, etc.
  • the coating device according to the invention initially has, in accordance with the prior art, a nozzle applicator, such as, for example, a print head as mentioned at the beginning and in FIG DE 10 2013 002 412 A1 , US 9 108 424 B2 and DE 10 2010 019 612 A1 is described, so that a detailed description of the structure and mode of operation of such print heads can be dispensed with.
  • a nozzle applicator such as, for example, a print head as mentioned at the beginning and in FIG DE 10 2013 002 412 A1 , US 9 108 424 B2 and DE 10 2010 019 612 A1 is described, so that a detailed description of the structure and mode of operation of such print heads can be dispensed with.
  • the coating device according to the invention is characterized by an additional device for preventing the nozzle from clogging.
  • a filter which is arranged upstream in front of the nozzle and filters the coating agent so that, for example, solid coating agent particles are filtered out, since these could lead to clogging of the nozzle.
  • the filter preferably has a certain filter mesh size, which is preferably adapted to the nozzle size of the nozzle opening of the nozzle.
  • the ratio of the filter mesh size to the nozzle size can be in the range from 0.01-5, with any intermediate intervals being possible.
  • Preferred values for the ratio of the filter mesh size to the nozzle size are, for example, 0.075, 0.1, 0.15, 0.66, 1.0 and 2.0.
  • this filter can be rinsed with a rinsing agent in order to be able to rinse out of the filter any residues of the coating agent that have been filtered out.
  • the filter is flowed through with a detergent.
  • the detergent can either be passed through the filter in the opposite direction to the normal flow direction or in the normal flow direction.
  • the rinsing agent is alternately directed through the filter against the normal flow direction and in the normal flow direction during a rinsing process in order to achieve the best possible rinsing effect.
  • the coating device therefore preferably has a flushing agent connection in order to supply the flushing agent.
  • the coating device preferably has a return connection in order to return a mixture of coating agent residues and flushing agent to a return line.
  • the coating device can have a flushing valve arrangement, which on the one hand is connected to the flushing agent connection and the return connection and, on the other hand, to two corresponding connections of the filter.
  • the flushing valve arrangement here preferably enables bidirectional flushing of the filter with the flushing agent, that is to say either counter to the normal flow direction or in the normal flow direction.
  • the filter is a double filter and has two individual filters which are arranged parallel to one another.
  • the coating agent can then optionally be fed into one single filter or the other single filter by means of a selector valve arrangement.
  • the selector valve arrangement optionally directs the flushing agent into one individual filter or into the other individual filter.
  • Such an operation can also be referred to as A / B operation, as is known in the field of painting technology for so-called A / B valves. In this way, the necessary rinsing processes do not lead to an interruption of the normal coating operation, since the other individual filter is still available for filtering the coating agent while one individual filter is being rinsed.
  • the coating device according to the invention preferably has a metering pump which conveys the coating agent to the nozzle applicator.
  • the filter can optionally be arranged between the metering pump and the nozzle applicator or upstream in front of the metering pump.
  • the coating device comprises a color changer which selects a desired coating agent from several coating agent feed lines and forwards it to the nozzle applicator. It is possible here for a filter to be arranged in each of the individual coating agent supply lines upstream in front of the color changer in order to filter the coating agent supplied. The individual filters at the inputs of the color changer can then be individually adapted to the respective coating agent.
  • the filter preferably has inner contours that are free of undercuts.
  • the inner surfaces of the filter in the flow areas preferably have a very low roughness index Rz ⁇ 10, Rz ⁇ 8, Rz ⁇ 7, Rz ⁇ 6.3, Rz ⁇ 5 or even Rz ⁇ 4.
  • a second aspect of the invention aims to detect the clogging of a nozzle.
  • This aspect of the invention therefore preferably provides a sensor arrangement in order to be able to differentiate between an error-free beam emission and an incorrect beam emission.
  • the sensor arrangement has an image sensor, such as a camera, for example.
  • the image sensor captures an image of at least one coating agent jet or a plurality of coating agent jets which are emitted by the nozzle applicator.
  • the visual axis of the image sensor (for example camera) is preferably orthogonal to the coating agent jets and parallel aligned with the plane of the coating agent jets, ie the image sensor views the coating agent jets from the front.
  • the viewing axis it is also possible for the viewing axis to be oriented transversely to the plane of the coating agent jets, ie the image sensor views the coating agent jets from the side. In a special embodiment, both views can be recorded one after the other or by means of two sensors.
  • the sensor arrangement in this exemplary embodiment preferably has an image evaluation unit which evaluates the image of the coating agent jets captured by the image sensor and detects faults therein, such as a missing coating agent jet due to the clogging of a nozzle.
  • the image acquisition can be improved here by an illumination device which is arranged in the visual axis of the image sensor on the opposite side of the coating agent jets.
  • the sensor arrangement has a capacitive sensor which measures a plurality of coating agent jets together.
  • the capacitive sensor measures only a single jet of coating agent capacitively, a capacitive sensor then preferably being provided for each nozzle.
  • the sensor arrangement has a light barrier, the coating agent jet from the nozzle passing the light barrier and being measured by the light barrier.
  • each nozzle is preferably assigned a light barrier which is passed by the respective coating agent jet.
  • the coating agent flows through a coating agent channel and is measured in the coating agent channel by a capacitive sensor or by a resistive sensor (resistance sensor) in order to deduce errors (e.g. insufficient flow).
  • the print head preferably emits a narrowly limited jet of coating agent in contrast to a spray mist, as is the case with conventional atomizers (e.g. rotary atomizers).
  • conventional atomizers e.g. rotary atomizers
  • the print head can, for example, emit a jet of droplets in contrast to a jet of coating agent which is contiguous in the longitudinal direction of the jet.
  • the print head emits a coating agent jet that is contiguous in the longitudinal direction of the jet, in contrast to a jet of droplets.
  • the printhead preferably has a very high transfer efficiency of at least 80%, 90%, 95% or even 99%, so that essentially all of the applied coating agent is completely deposited on the component without the occurrence of disruptive overspray.
  • the print head preferably has a high surface coating performance, which is preferably so great that the print head is suitable for painting motor vehicle body components.
  • the surface coating performance of the nozzle applicator is therefore preferably greater than 0.5 m 2 / min, 1 m 2 / min or even 3 m 2 / min.
  • the nozzle applicator is preferably moved by means of a manipulator, which is preferably a multi-axis painting robot with serial robot kinematics and at least six movable robot axes.
  • control of the coating agent delivery in the nozzle applicator is preferably carried out by control valves with a controllable actuator, such as a magnetic actuator or a piezo actuator.
  • the nozzle applicator is moved over a test surface (e.g. fleece, glass plate) with the nozzles open, the nozzle applicator applying jets of coating agent to the test surface and thereby generating a spray pattern on the test surface.
  • the spray pattern can then be used to determine whether the nozzles are partially or completely blocked.
  • the operating method therefore provides that the spray pattern is evaluated on the test area, for example with a camera and an image evaluation unit.
  • Figure 1 shows a greatly simplified representation of a coating device not according to the invention with a nozzle applicator 1 as the application device, which can be, for example, a print head that emits spatially narrow jets of coating agent instead of a spray mist, as is the case with conventional atomizers (e.g. rotary atomizers).
  • a nozzle applicator 1 as the application device, which can be, for example, a print head that emits spatially narrow jets of coating agent instead of a spray mist, as is the case with conventional atomizers (e.g. rotary atomizers).
  • the nozzle applicator 1 is supplied with the paint to be applied on the inlet side via a filter 2, a metering pump 3 and a color changer 4.
  • the color changer 4 is connected on the input side to several coating agent feed lines F1-F6, via which varnishes of different colors can be fed.
  • the color changer 4 is connected on the input side to a pulsed air line PL and to a thinner line V, via which pulsed air or rinsing agent (thinner) for rinsing the nozzle applicator 1, the filter 2 and the metering pump 3 can be supplied.
  • the coating device has a return valve 5, via which the flushed-out coating agent residues and rinsing agent can be conducted into a return line R.
  • the nozzle applicator 1 has numerous nozzles with a very small nozzle diameter, so that there is a risk of the nozzles of the nozzle applicator 1 becoming clogged.
  • the filter 2 reduces this risk of clogging of the nozzles, since the filter 2 filters out coating agent constituents which can lead to clogging of the nozzles.
  • the filter 2 can be rinsed in order to be able to rinse the filtered coating agent components out of the filter 2 again.
  • the coating device has a flushing valve arrangement 6, which is connected on the inlet side to the flushing agent supply line V and to the return line R.
  • the flushing valve arrangement 6 is connected to an upstream and to a downstream flushing connection of the filter 2.
  • the flushing valve arrangement 6 can therefore optionally guide flushing agent through the filter 2 in the normal flow direction or counter to the normal flow direction in order to flush out the coating agent residues located therein from the filter 2.
  • FIG Figure 2 shows a modification of FIG Figure 1 so that to avoid repetition, reference is made to the above description, the same reference symbols being used for corresponding details.
  • a special feature of this exemplary embodiment is that two individual filters 2.1, 2.2 are provided, which are connected in parallel to one another. Upstream and downstream behind the two individual filters 2.1, 2.2, there is a respective selector valve arrangement 7 and 8, which is connected to the two individual filters 2.1, 2.2.
  • the upstream selection valve arrangement 7 can optionally supply the coating agent and flushing agent to the individual filter 2.1 or the individual filter 2.2.
  • the downstream selector valve arrangement 8 can take up coating agent from one of the individual filters 2.1 or 2.2 and feed it to the nozzle applicator 1 and take up rinsing agent and coating agent residues from the other individual filter 2.2 or 2.1 and feed them into the return line R.
  • a / B operation is possible, in which coating agent always flows through one of the two individual filters 2.1 or 2.2, while the other individual filter 2.2 or 2.1 is rinsed with detergent.
  • Figure 3 shows a further modification not according to the invention, so that to avoid repetition, reference is made to the above description, the same reference symbols being used for corresponding details.
  • a special feature of this modification which is not according to the invention, is that a filter 2.1-2.6 is arranged in each of the coating agent feed lines F1-F6. This offers the possibility that the filter characteristics and filter properties of the individual filters 2.1-2.4 can be individually adapted to the properties of the respective coating agent.
  • the coating device initially has a camera 9 which is arranged laterally next to the nozzle applicator 1 and is oriented with its viewing axis essentially at right angles to the plane of the coating agent jets. The camera 9 thus views the coating agent jets from the nozzle applicator 1 from the side.
  • an illumination device 10 is arranged on the opposite side of the coating agent jets.
  • the camera 9 On the output side, the camera 9 is connected to an image evaluation unit 11, which evaluates the image of the coating agent jets captured by the camera 9 in order to detect defects.
  • the drawing shows an exemplary, simplified representation of a captured image 12 with a plurality of coating agent jets 13-19.
  • the coating agent jets 13-15 are free of defects here.
  • the coating agent jet 16 emerges obliquely from the nozzle applicator 1, which can be caused by a partial clogging of the nozzle in question.
  • the coating agent jet 18, on the other hand, has an insufficient amount of the coating agent, which can be caused by a partial clogging of the coating agent supply.
  • the image evaluation unit 11 now enables the various types of fault-free or faulty coating agent jets 13-19 to be recognized and differentiated.
  • Figure 4B shows a modification of Figure 4A , so that to avoid repetition, reference is made to the above description, the same reference symbols being used for corresponding details.
  • a special feature of this exemplary embodiment is that the viewing axis of the camera 9 is aligned at right angles to the individual coating agent jets, but parallel to the plane of the coating agent jets.
  • Figure 5 shows a modification of the embodiment according to Figure 4A or. Figure 4B so that to avoid repetition, reference is made to the above description, the same reference symbols being used for corresponding details.
  • a special feature of this exemplary embodiment is that, instead of the camera-based image acquisition system, several light barriers 20-23 are provided, each of which measures a coating agent jet 24-27 and is each connected to an evaluation unit 28-31 in order to be able to detect a missing coating agent jet.
  • FIG. 6 shows a further modification, so that in order to avoid repetition, refer to the above description is referred to, the same reference numerals being used for corresponding details.
  • a special feature of this exemplary embodiment is that, instead of the light barriers 20-23, a capacitive sensor with two capacitor plates 32, 33 is used in order to measure the coating agent jets 24-27.
  • the coating agent jets 24-27 here run between the two capacitor plates 32, 33, so that the capacitive sensor measures all the coating agent jets 24-27 together.
  • the capacitive sensor 32, 33 is connected to an evaluation unit 34 which can detect faults.
  • a special feature of this exemplary embodiment is that the two capacitor plates 32, 33 of the capacitive sensor are arranged on the walls of a nozzle channel 35 which runs through a nozzle plate 36.
  • the capacitive sensor with the two capacitor plates 32, 33 thus measures the flow of coating agent through the nozzle channel 35 and can thereby detect faults.
  • the coating agent is fed in through a lacquer feed 37 in the print head.

Landscapes

  • Coating Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (12)

  1. Dispositif de revêtement pour le revêtement de pièces avec un produit de revêtement, plus particulièrement pour la peinture de pièces de carrosserie de véhicule, avec :
    a. un applicateur à buses (1), plus particulièrement une tête d'impression, avec au moins une buse pour l'émission d'un jet de produit de revêtement (13 - 19 ; 24 - 27) du produit de revêtement sur la pièce à revêtir,
    b. un filtre (2.1, 2.2) en amont de la buse pour le filtrage du produit de revêtement, dans lequel le filtre (2.1, 2.2) est un double filtre avec deux filtres simples (2.1, 2.2) qui sont disposés parallèlement entre eux et
    c. un système à soupape de sélection (7),
    dans lequel le dispositif de revêtement est conçu de sorte que
    d. le produit de revêtement peut être guidé par le système à soupape de sélection (7) au choix vers un filtre simple (2.1) ou vers l'autre filtre simple (2.2),
    e. un produit de rinçage peut être guidé par le système à soupape de sélection (7) au choix vers un filtre simple (2.1) ou vers l'autre filtre simple (2.2),
    f. lors du fonctionnement, un filtre simple (2.1) est traversé par le produit de rinçage tandis que l'autre filtre simple (2.2) est traversé par le produit de revêtement.
  2. Dispositif de revêtement selon la revendication 1,
    caractérisé par
    un dispositif pour la détection de l'encrassement de la buse avec un système de capteurs (9 ; 20 - 23 ; 33, 33) permettant de différencier l'émission non défectueuse d'un jet de l'émission défectueuse d'un jet par l'applicateur à buses (1).
  3. Dispositif de revêtement selon la revendication 2,
    caractérisé en ce que
    a) le système de capteurs (9, 10, 11) comprend un capteur d'image (9), plus particulièrement une caméra (9), qui prend une image (12) des jets de produit de revêtement (13 - 19), plus particulièrement avec un axe de vision
    a1) transversal par rapport au plan des jets de produit de revêtement (13 - 19) et transversal par rapport aux différents jets de produit de revêtement (13 - 19) et/ou
    a2) dans le plan des jets de produit de revêtement (13 - 19) et transversal par rapport aux différents jets de produit de revêtement (13 - 19),
    b) le système de capteurs (9, 10, 11) comprend une unité d'analyse d'images (11) qui analyse l'image (12) prise par le capteur d'image (9) et y détecte des erreurs.
  4. Dispositif de revêtement selon la revendication 3, caractérisé en ce que l'unité d'analyse d'image (11) détecte, par l'analyse d'image, les erreurs suivantes et de préférence également les distingue :
    a) un jet de produit de revêtement (16) oblique, qui sort de manière inclinée par rapport à l'axe de la buse et/ou
    b) un jet de produit de revêtement (17) instable qui se décompose en gouttelettes de produit de revêtement et/ou
    c) un jet de produit de revêtement (18) avec une quantité de produit de revêtement trop faible et/ou
    d) un jet de produit de revêtement (19) perturbé et/ou
    e) l'absence du jet de produit de revêtement du fait de l'encrassement de la buse.
  5. Dispositif de revêtement selon l'une des revendications 2 à 4, caractérisé en ce que
    a) le système de capteurs comprend un capteur capacitif (32, 33) et
    b) le capteur capacitif (32, 33) mesure conjointement plusieurs jets de produit de revêtement (24 - 27) ou
    c) à chaque buse (35) correspond un capteur capacitif (32, 33) qui mesure de manière capacitive le jet de produit de revêtement respectif.
  6. Dispositif de revêtement selon l'une des revendications 2 à 5, caractérisé en ce que
    a) le système de capteurs comprend une barrière photoélectrique (20 - 23), dans lequel le jet de produit de revêtement (24 - 27) provenant de la buse traverse la barrière photoélectrique (20 - 23) et/ou
    b) à chaque buse correspond une barrière photoélectrique (20 - 23) qui est traversée par le jet de produit de revêtement (24 - 27) respectif.
  7. Dispositif de revêtement selon l'une des revendications 2 à 6, caractérisé en ce que
    a) le produit de revêtement s'écoule à travers un canal de produit de revêtement (35) et
    b) un capteur capacitif ou résistif (32, 33) mesure l'écoulement du produit de revêtement dans le canal de produit de revêtement (35) afin d'en déduire des erreurs.
  8. Dispositif de revêtement selon l'une des revendications précédentes,
    caractérisé en ce que
    a) la buse comprend une ouverture de buse avec une taille de buse déterminée et
    b) le filtre (2.1, 2.2) présente une taille de maille de filtrage déterminée et
    c) le rapport entre la taille de maille du filtre et la taille de buse est supérieur à 0,01, 0,05, 0,1, 0,2 ou 1 et/ou
    d) le rapport entre la taille de maille du filtre et la taille de buse est inférieur à 5, 2, 1, 0,5.
  9. Dispositif de revêtement selon l'une des revendications 1 à 7,
    caractérisé en ce que
    a) le dispositif de revêtement comprend un raccord de produit de rinçage (V) afin d'introduire le produit de rinçage et/ou
    b) le dispositif de revêtement comprend un raccord de retour (R) afin d'introduire un mélange de produit de revêtement et de produit de rinçage dans un retour.
  10. Dispositif de revêtement selon l'une des revendications précédentes, caractérisé en ce que
    a) le dispositif de revêtement comprend une pompe de dosage (3) qui transporte le produit de revêtement vers l'applicateur à buses (1) et
    b) le filtre (2.1, 22) est disposé entre la pompe de dosage (3) et l'applicateur à buses (1) ou
    c) le filtre (2.1, 2.2) est disposé en amont de la pompe de dosage.
  11. Dispositif de revêtement selon l'une des revendications précédentes, caractérisé en ce que
    a) le dispositif de revêtement comprend un changeur de couleur (4) qui sélectionne, parmi plusieurs conduites d'alimentation en produit de revêtement (F1 - F6), un produit de revêtement souhaité et le transmet à l'applicateur à buses (1),
    b) dans les conduites de produit de revêtement (F1 - F6), en amont du changeur de couleur (4), est disposé un filtre (2.1, 2.2).
  12. Dispositif de revêtement selon l'une des revendications précédentes, caractérisé en ce que
    a) la tête d'impression émet un jet de produit de revêtement étroitement délimité au lieu d'un brouillard de pulvérisation et/ou
    b) la tête d'impression émet un jet de gouttelettes au lieu d'un jet de produit de revêtement cohérent dans la direction longitudinale du jet ou
    c) la tête d'impression émet un jet de produit de revêtement cohérent dans la direction longitudinale du jet au lieu d'un jet de gouttelettes et/ou
    d) la tête d'impression présente un rendement d'application d'au moins 80 %, 90 %, 95 % ou 99 %, de façon à ce que globalement l'ensemble du produit de revêtement appliqué soit entièrement déposé sur la pièce, sans pulvérisation en excès et/ou
    e) la tête d'impression présente une performance de revêtement de surface d'au moins 0,5 m2/min, 1 m2/min, 2 m2/min ou d'au moins 3 m2/min et/ou
    f) l'applicateur à buses (1) est déplacé au moyen d'un manipulateur, plus particulièrement au moyen d'un robot multiaxial et/ou
    g) le produit de revêtement est une peinture, plus particulièrement une peinture de base, un vernis, une peinture à effet, une peinture au mica ou une peinture métallique et/ou
    h) le produit de revêtement est une peinture à l'eau ou une peinture à solvant et/ou
    i) l'applicateur à buses (1) comprend au moins un actionneur contrôlable électriquement afin d'éjecter les gouttes du produit de revêtement hors de la tête d'impression, plus particulièrement un actionneur magnétique ou un actionneur piézoélectrique et/ou
    j) la buse présente un diamètre de buse inférieur à 1 µm, 500 µm, 250 µm, 120 µm ou 50 µm.
EP20164222.0A 2016-12-14 2017-12-01 Dispositif de revêtement et procédé de fonctionnement associé Active EP3689474B1 (fr)

Applications Claiming Priority (3)

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DE102016014951.5A DE102016014951A1 (de) 2016-12-14 2016-12-14 Beschichtungseinrichtung und zugehöriges Betriebsverfahren
EP17808445.5A EP3523053B1 (fr) 2016-12-14 2017-12-01 Dispositif de revêtement et méthode de revêtement correspondante
PCT/EP2017/081099 WO2018108563A1 (fr) 2016-12-14 2017-12-01 Dispositif d'application de revêtement et procédé pour le faire fonctionner

Related Parent Applications (2)

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EP17808445.5A Division-Into EP3523053B1 (fr) 2016-12-14 2017-12-01 Dispositif de revêtement et méthode de revêtement correspondante

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EP3689474B1 true EP3689474B1 (fr) 2021-03-31

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JP (1) JP7044783B2 (fr)
CN (1) CN110072633B (fr)
DE (1) DE102016014951A1 (fr)
ES (2) ES2877508T3 (fr)
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MX2019006970A (es) 2019-08-01
EP3523053A1 (fr) 2019-08-14
ES2797918T3 (es) 2020-12-04
JP7044783B2 (ja) 2022-03-30
US20190308211A1 (en) 2019-10-10
WO2018108563A1 (fr) 2018-06-21
JP2020513311A (ja) 2020-05-14
EP3689474A1 (fr) 2020-08-05
HUE050094T2 (hu) 2020-11-30
US11167302B2 (en) 2021-11-09
ES2877508T3 (es) 2021-11-17
CN110072633B (zh) 2021-10-26
CN110072633A (zh) 2019-07-30
DE102016014951A1 (de) 2018-06-14
EP3523053B1 (fr) 2020-05-13

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