EP1872864B1 - Dispositif et procédé destinés à l'application d'un revêtement liquide sur une surface - Google Patents

Dispositif et procédé destinés à l'application d'un revêtement liquide sur une surface Download PDF

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Publication number
EP1872864B1
EP1872864B1 EP20070012411 EP07012411A EP1872864B1 EP 1872864 B1 EP1872864 B1 EP 1872864B1 EP 20070012411 EP20070012411 EP 20070012411 EP 07012411 A EP07012411 A EP 07012411A EP 1872864 B1 EP1872864 B1 EP 1872864B1
Authority
EP
European Patent Office
Prior art keywords
application
nozzle
coating composition
gas flow
coating
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.)
Not-in-force
Application number
EP20070012411
Other languages
German (de)
English (en)
Other versions
EP1872864A2 (fr
EP1872864A3 (fr
Inventor
Walter Mendelin
Michael Palenberg
Jörg Dobberschütz
Steffen Balack
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.)
Mankiewicz Gebr and Co GmbH and Co KG
Original Assignee
Mankiewicz Gebr and Co GmbH and Co KG
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
Priority claimed from DE102006029764A external-priority patent/DE102006029764A1/de
Priority claimed from DE200610060397 external-priority patent/DE102006060397A1/de
Priority claimed from DE102006060398A external-priority patent/DE102006060398A1/de
Application filed by Mankiewicz Gebr and Co GmbH and Co KG filed Critical Mankiewicz Gebr and Co GmbH and Co KG
Publication of EP1872864A2 publication Critical patent/EP1872864A2/fr
Publication of EP1872864A3 publication Critical patent/EP1872864A3/fr
Application granted granted Critical
Publication of EP1872864B1 publication Critical patent/EP1872864B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
    • B05D3/042—Directing or stopping the fluid to be coated with air
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of 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
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0884—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being aligned
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • 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

Definitions

  • the present invention initially relates to a device with an application nozzle.
  • Such devices are known. They may include a robot that can move a nozzle to deliver the liquid to the surface to be coated. This nozzle can apply the liquid to the surface, for example, by means of an air jet called horn air.
  • the devices are used for example for applying paint or release agents on a surface, in particular a body of a motor vehicle.
  • protective coverings such as an underbody protection, or adhesive can be applied to a surface.
  • the problem underlying the present invention is thus to provide a device of the type mentioned, the one can prevent disturbing dripping.
  • the generated air flow can prevent the droplets formed at the end of the application process from reaching the surface in an uncontrolled manner.
  • the air flow can direct the drops on the already applied coating.
  • the air flow can also direct the drops into a separate collecting container or into the collecting area for paint provided in the painting booths.
  • Fig. 3 schematically shows the state of the art. From the known device, which may be arranged on a robot, only a part is shown, which includes a nozzle 2. From this nozzle 2, for example, liquid 3 can emerge, which can produce a coating on the schematically indicated workpiece 4. This nozzle 2 can apply the liquid to the surface of the workpiece 4, for example by means of an air flow.
  • Fig. 3 shows the state after the stopping of the robot or after the termination of the actual application process. Liquid 3 drips out of the nozzle in small quantities. These drops of the liquid 3 can fall uncontrollably next to or on the workpiece 4, which is to be coated. This suggested dripping can thus cause the disadvantages already described.
  • a slightly larger part is indicated.
  • This device 1 also comprises a nozzle 2 or a plurality of nozzles 2.
  • the nozzle 2 can emit a liquid 3, which can produce a coating on the workpiece 4.
  • the robot carrying the device 1 can be moved along the arrow 6 relative to the workpiece.
  • the apparatus 1 further comprises means for generating an additional air jet 5 different from the air jet used by the nozzle 2 for applying the coating.
  • These means comprise a compressed air connection 7 and a nozzle, from which the air jet 5 can emerge.
  • the air jet 5 is turned on when the robot stops, that is, when the application process is terminated.
  • the drops of the liquid 3 no longer fall down in an uncontrolled manner, but are deflected by the air jet 5 in a targeted manner. This can, as in Fig. 2 imaged, carried out such that the drops are performed directly on the coating already produced on the surface of the workpiece 4. Alternatively, the drops can also be specifically directed into appropriate collecting means.
  • Another invention relates to a method of making a removable surface protection.
  • This further invention which is sought for protection alone and in combination with the invention set forth above, relates to a process for producing a removable surface protection by applying a liquid, curable coating composition (liquid film) to painted surfaces wherein the liquid coating composition is applied through an application die, the relative over a predetermined, to be protected surface area in an application direction is moved and the liquid coating composition is supplied under pressure, sprayed distributed across the application surface across an application width on the surface, the application by starting and stopping the supply of coating composition to the application nozzle in coordination with their relative movement in the application direction to the predetermined surface area in Application is limited.
  • the movement of the application nozzle is referred to here as relative, since the surface to be coated can be moved when the application nozzle is stationary.
  • Such a procedure is over DE 198 54 760 A1 which describes a method for producing a removable surface protection (liquid film) on a painted motor vehicle body.
  • a liquid is sprayed onto the painted body surface. This liquid solidifies into a peelable film.
  • the application of the liquid via an application nozzle in the form of a fan nozzle to avoid so-called overspray and to achieve edge-sharp application.
  • the application nozzle is moved by a robot arm over the predetermined surface area to be protected in an application direction.
  • the application is limited by starting and terminating the supply of coating composition to the application nozzle in coordination with their movement in the application direction to the given surface area in the application direction, so that only the predefined surface areas are coated.
  • a disadvantage of the method described is the uneven layer thickness of the applied liquid film.
  • the layer thickness at the edges of the applied liquid web is higher than in the middle of the web.
  • the width of the liquid web applied with a fan nozzle varies as a function of the material pressure under which the liquid is discharged from the nozzle.
  • the liquid paths discharged from the fan nozzle must be applied overlapping.
  • the layer thickness of the applied film is additionally increased in the overlapping areas.
  • Uneven layer thicknesses of the applied film lead to uneven drying behavior of the liquid film.
  • DE 10 2004 018 597 B3 describes the application of a liquid film along a web direction with an application head, which consists of a plurality of chambers, which are arranged one behind the other in the flow direction, and one or more in the application direction arranged behind one another rows of adjacent round jet nozzles has (multi-jet).
  • the use of the multi-jet nozzle in liquid roll application has the following advantages: a multiplicity of liquid beads are simultaneously discharged side by side. These liquid beads flow into each other immediately after application and form a fluid path.
  • the layer thicknesses of the caterpillars deposited within the liquid web and the caterpillars deposited at the edge of the liquid web are the same. Ie. the layer thickness of the liquid web thus applied is more uniform across the width of the web than when using a fan nozzle.
  • the width of the applied liquid web is less dependent on the material pressure than when using a fan nozzle. Therefore, it is not necessary to overlap the individual liquid webs to coat larger areas with a closed film. The layer thickness distribution is therefore more uniform than when using a fan nozzle.
  • a common disadvantage of both of the previously described methods is the following: Before the start of the application process, the application nozzle is separated from the line supplying the liquid coating composition by a closed valve. The material is already below the pressure required for the application in the line. The dead volumes of the nozzle are at this time either not yet filled with material or contain material that is under lower pressure than the pressure selected for the application.
  • the valve is opened.
  • the liquid coating composition flows into the nozzle of the application head and there is an increase in the material pressure within the dead volume of the nozzle. Depending on the shape of the flow paths within the nozzle structure, this can result in an abruptly increased material pressure in the dead volume of the nozzle. Only in the course of the application, then under constant flow conditions, a constant material pressure.
  • the flying material droplets contaminate the vehicle surface outside the predetermined surface area to be protected which is to be coated. These impurities must be removed by hand after drying the liquid foil.
  • the overpressure prevailing in the dead volume of the nozzle in comparison with the ambient pressure generates the material flow through the outlet openings of the nozzle.
  • the material pressure in the dead volume of the nozzle remains constant.
  • the speed of the material discharged from the nozzle is proportional to the material overpressure prevailing in the dead volume of the nozzle in the jet direction.
  • the speed of the material discharged from the nozzle is in the direction of application, i. parallel to the plane of the surface to be coated (horizontal), proportional to the speed of movement of the robot arm, which guides the application head with the nozzle over the surface to be coated.
  • the valve which separates the material supply from the dead volume of the nozzle, is closed. Thereafter, the material pressure in the dead volume of the nozzle decreases due to the still ongoing material discharge from the nozzle to ambient pressure.
  • the vertical speed of the material discharged from the nozzle is lower than during the application.
  • the material flies longer through the air until it hits the surface to be coated.
  • the horizontal speed of the discharged material is unchanged by the feed speed of the robot arm.
  • the material discharged from the nozzle flies farther in the feed direction of the robot arm than during the application. This leads especially at high application speed, i. high feed rate of the robot arm, to impurities beyond the specified surface area on surfaces that are not supposed to be coated.
  • the application rate which was previously limited by the occurrence of impurities at high speeds when using the multi-jet nozzle, should be increased.
  • nozzle devices in the application direction in front of and behind the application nozzle which are designed to direct a gas flow over the application width when starting the application, to be directed from the back at an angle to the spray jet of the application nozzle in the direction of application, and on termination the application a gas flow distributed over the application width, in the application direction from the front at an angle to the spray jet of the application nozzle to each to prevent overspraying of coating composition beyond the predetermined surface area and to direct the spray jet in the predetermined surface area.
  • the respective nozzle device with compressed gas, e.g. Compressed air, applied.
  • compressed gas e.g. Compressed air
  • the air flowing out of the nozzle openings forms an "air curtain" which blows the liquid emerging from the spray nozzle onto the surface to be coated or already coated.
  • the supply of compressed air to the rear nozzle device is terminated.
  • the compressed air supply to the front nozzle device is started at a predetermined time with respect to the closing of the valve in the material supply.
  • a significant advantage of this embodiment with pre-wetting compared to application methods without pre-wetting is the material savings of 15 to 20% per unit area, which is achieved in the preferred method.
  • washing surfaces to be coated with water or aqueous cleaning agents is known as pretreatment prior to coating. It removes impurities that could interfere with the adhesion of the coating to the surface. The water or the aqueous cleaning agent but before the application of the Coating material completely removed from the surface.
  • the surface is treated in step a) with water, which can optionally be condensed by condensation on the surface of water supersaturated air.
  • the pretreatment by condensation has the advantage that the generated water layer thicknesses are uniform and low.
  • it can be dispensed with application technology for the spraying of water.
  • the treatment with water or the aqueous solution of surface-active substances takes place on the surface by spraying.
  • the temperature of the surface in step a) is 1 ° C to 50 ° C, preferably 5 ° C to 40 ° C, more preferably 10 ° C to 30 ° C, especially 15 ° C to 25 ° C.
  • the coating structure on the vehicle surface is preferably a typical car body painting, which consists for example of a cathodic dip coating, optionally a filler, a basecoat and additionally a clearcoat as topcoat. But it is also possible that a pigmented topcoat is used instead of basecoat and transparent clearcoat.
  • the used as a final topcoat transparent or pigmented lacquer may be a lacquer based on, for example, a one- or two-component polyurethane system, or a melamine resin / polyol system.
  • the polyols used to formulate the topcoat lacquer can be polyester, polyacrylate or polycarbonate polyols.
  • the coating composition is applied less than 25 minutes after step a), more preferably 0.1 second to 25 minutes, especially 0.1 second to 15 minutes, such as 0.1 second to 10 minutes, or 1 second to 1 minute, for example 1 second to 45 seconds, or 1 second to 30 seconds after step a).
  • the coating composition is preferably a water-dilutable coating material based on e.g. As polymer dispersions, in particular polyurethane dispersions and more preferably dispersions of polyesterurethanes.
  • a multi-jet nozzle having 1 to 6 rows of 5 to 500 nozzles each, more preferably 10 to 320 nozzles, particularly 20 to 160 nozzles, such as 40 to 80 nozzles.
  • higher viscosity coating compositions can be used as compared to the non-wetting process.
  • Preferred viscosity ranges are 5 to 40, preferably 10 to 35, in particular 15 to 30 Pa ⁇ s.
  • the layer thickness of the cured coating composition is preferably 40 to 170 ⁇ m, more preferably 50 to 160 ⁇ m, especially 60 to 130 ⁇ m, for example 70 to 120 ⁇ m, such as 80 to 110 ⁇ m or 90 to 100 ⁇ m.
  • the curing in step c) can be carried out at elevated temperature, for example at 10 ° C to 90 ° C, preferably 15 ° C to 80 ° C, especially 15 ° C to 60 ° C, such as 20 ° C to 50 ° C.
  • FIG. 4 an application nozzle with attached nozzle devices in a side view (in the illustration above) and in plan view from below (in the illustration below), and
  • FIG. 5 a side view of the assembly of application nozzle and nozzle devices with indicated spray jet and gas flows shows.
  • FIG. 4 shows the application nozzle 2a, on whose sides in each case a nozzle device 10 and 20 is mounted.
  • the application nozzle 2a may have a tube closed at one end and substantially rectangular in cross section; alternatively, the tube may also be open on both sides and provided with a coating composition port.
  • On the underside of the tubular body are in a row along the longitudinal axis of the tubular body, a plurality of holes. The diameter of the holes can be up to 2 mm.
  • the nozzle device 10 (20) also has an elongated tubular hollow body, which comprises on its underside a fan nozzle in the form of an elongated slot 12 (22) which extends parallel to the application nozzle row.
  • the nozzle devices 10, 20 are each mounted inclined to the application nozzle 2a in that the gas streams emerging from the slots 12, 22 of the nozzle devices 10, 20 are inclined to the spray jet 4a emerging from the application nozzle, this angle of inclination preferably being in the range of 25 to 35 °.
  • the nozzle devices 10, 20 are supplied with compressed air by supply lines (not shown) which are connected to the hollow bodies at both ends.
  • the slots 12, 22 for discharging the gas streams it is also possible to provide rows of individual nozzles instead of the slots on the nozzle devices, these nozzle rows then being approximately Overall size and arrangement as the fan slots 12, 22 have.
  • FIG. 5 schematically shows the arrangement of the application nozzle 2 with the nozzle devices 10, 20 mounted thereon in a side view.
  • the application direction ie the direction in which the application nozzle is moved over the surface to be coated, is indicated by the horizontal arrow.
  • the spray jet of the application nozzle 2a is denoted by 4a.
  • the nozzle device 20 is supplied with compressed air, so that the air flow indicated by dashed lines impinges on the spray jet 4 of the application nozzle 2a and deflects it into the jet 4 '.
  • the nozzle device 10 is actuated and generates an air flow indicated by dashed lines, which is emitted at an angle b to the spray jet 4a of the application nozzle 2a and deflects the spray jet 4a into the spray jet 4 ", thus overspraying at the end of the application of material to avoid the coating surface.
  • the control of the movement of the application nozzle 2a in Apptikationscardi, the coating material supply to the application nozzle 2a and coordinated with the control of compressed air supply to the nozzle means is carried out by a programmed control device, in the control parameters on the coating material supply, compressed air supply to the nozzle devices and information about the to be coated, predetermined surface can be entered.
  • the coating composition is conveyed by means of a suitable metering device (pump) and discharged through a nozzle consisting of a plurality of holes.
  • the individual beads forming on exit from the nozzle combine to form a closed film upon impact with the surface.
  • a certain overpressure is required, which allows the merging of the individual tracks and tracks into a film.
  • FIG. 7 illustrates the advantages of the method according to the invention and correspondingly produced coatings.
  • the aim of the invention is inter alia the reduction of the applied amount of coating composition per unit area.
  • the applied caterpillars and webs of coating composition do not form a closed film (left). Only the pre-wetting leads by running the individual tracks to a film (right).
  • the surface to be protected is pre-wetted, which leads to its uniform flow in the subsequent application of the liquid film, namely at lower application pressures and thus also amounts of coating composition.
  • FIG. 8 Figure 12 illustrates the peeling of a coating made according to the invention according to an embodiment of the invention, showing the step of peeling off of a bonnet.
  • a water-dilutable one-component coating composition based on a polyurethane dispersion was applied for the preservation of surfaces such as, for example, automobile bodies.
  • the composition forms after drying (even at room temperature) a mechanically and chemically highly resistant protective layer (dried remplissigfofie). This can be removed by hand (peel off), as it is only connected by relatively weak adhesion forces with the surface to be protected.
  • the dried composition is typically removed from the surface by simply peeling it off immediately prior to delivery of the automobile, exposing the underlying topcoat.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)

Claims (20)

  1. Dispositif comprenant une buse d'application (2a), un robot qui est conçu pour déplacer la buse d'application, selon une direction d'application, au-dessus d'un secteur de surface prédéfini, à protéger, un appareil d'amenée qui amène sous pression à la buse d'application la composition de revêtement liquide, dans lequel la buse d'application projette essentiellement à la verticale sur la surface la composition de revêtement de manière répartie transversalement à la direction d'application sur une largeur d'application, dans lequel la commande du robot est conçue pour limiter dans la direction d'application l'application par le démarrage et l'arrêt de l'amenée de la composition de revêtement à la buse d'application en coordination avec le déplacement de cette dernière dans la direction d'application sur le secteur de surface prédéfini, des systèmes de buses (10, 20) qui sont présents dans la direction d'application devant et derrière la buse d'application (2a) et qui sont pilotés par la commande du robot afin de diriger, au démarrage de l'application, un flux de gaz réparti sur la largeur d'application, dans la direction d'application de l'arrière, selon un angle (c) par rapport au faisceau de projection de la buse d'application (2a) et, lors de l'arrêt de l'application, afin de diriger un flux de gaz, réparti sur la largeur d'application, dans la direction d'application de l'avant, selon un angle (b) par rapport au faisceau de projection de la buse d'application, afin d'empêcher respectivement une projection en excès de la composition de revêtement sur le secteur de surface prédéfini.
  2. Procédé de fabrication d'une protection de surface retirable par application d'une composition de revêtement liquide durcissable sur des surfaces laquées, selon lequel la composition de revêtement liquide est projetée essentiellement à la verticale sur à surface, de manière répartie transversalement 1a direction d'application sur une largeur d'application, par le biais d'une buse d'application qui se déplace relativement dans une direction d'application au-dessus d'un secteur de surface prédéfini, à protéger et à laquelle est amenée sous pression la composition de revêtement liquide, dans lequel l'application est limitée dans la direction d'application par le démarrage et l'arrêt de l'amenée de la composition de revêtement à la buse d'application en coordination avec le déplacement relatif de cette dernière dans la direction d'application sur le secteur de surface prédéfini, dans lequel des systèmes de buses (10, 20) sont présents dans la direction d'application devant et derrière la buse d'application (2a) et sont préparés pour diriger, au démarrage de l'application, un flux de gaz réparti sur la largeur d'application, dans la direction d'application de l'arrière selon un angle (c) par rapport au faisceau de projection de la buse d'application (2a) et pour diriger, à l'arrêt de l'application un flux de gaz réparti sur la largeur d'application, dans la direction d'application de l'avant selon un angle (b) par rapport au faisceau de projection de la buse d'application (2a), afin d'empêcher respectivement une projection excessive de la composition de revêtement sur le secteur de surface prédéfini.
  3. Procédé selon la revendication 2, caractérisé en ce que le flux de gaz des systèmes de buses est dirigé respectivement selon un angle (b, c) de 25 à 35 degrés par rapport au faisceau de projection de la buse d'application.
  4. Procédé selon l'une des revendications précédentes 2 ou 3, caractérisé en ce que les systèmes de buses (10, 20) sont alimentés en air comprimé afin de produire ainsi un flux d'air en tant que flux de gaz.
  5. Procédé selon la revendication 4, caractérisé en ce que les systèmes de buses (10, 20) sont alimentés en air comprimé avec une surpression de 0,01 à 6 bars.
  6. Procédé selon l'une des revendications précédentes 2 à 5, caractérisé en ce que les systèmes de buses (10, 20) sont conçus afin de produire un flux de gaz laminaire dans la plage de pressions prévue qui est appliquée aux systèmes de buses.
  7. Procédé selon l'une des revendications précédentes 2 à 6, caractérisé en ce que le système de buses (10, 20) employé est un corps de tube allongé qui, en plus d'un branchement d'amenée de gaz, comporte une ouverture de sortie de buse (12, 22) allongée, en forme de fente s'étendant dans la direction longitudinale du corps de tube, afin de sortir le flux de gaz.
  8. Procédé selon l'une des revendications 2 à 7, caractérisé en ce que le système de buses employé est respectivement un corps de tube allongé qui, en plus d'un branchement d'amenée de gaz, comporte plusieurs buses individuelles qui sont disposées en ligne dans la direction longitudinale du corps en forme de tube et qui sortent ensemble le flux de gaz.
  9. Procédé selon l'une des revendications précédentes 2 à 8, dans lequel
    a) avant l'application de la composition de revêtement, la surface est traitée avec de l'eau ou avec une solution aqueuse d'une ou de plusieurs substances tensioactives,
    b) ensuite, la composition de revêtement est appliquée sur la surface traitée avec un procédé selon l'une des revendications précédentes avant que l'eau soit entièrement séchée sur la surface traitée, et
    c) la composition de revêtement est durcie afin de former un revêtement durci ayant une épaisseur de couche au maximum de 200 pm.
  10. Procédé selon la revendication 9, dans lequel la surface est traitée avec de l'eau à l'étape a).
  11. Procédé selon la revendication 9 ou 10, dans lequel l'eau est condensée.
  12. Procédé selon la revendication 9, dans lequel l'eau ou la solution aqueuse de substances tensioactives est vaporisée sur la surface.
  13. Procédé selon l'une des revendications 9 à 12, caractérisé en ce que la température de la surface s'élève jusqu'à 50 °C à l'étape a).
  14. Procédé selon l'une des revendications 2 à 13, caractérisé en ce que la surface est une surface d'un véhicule automobile revêtue d'une laque de finition.
  15. Procédé selon l'une des revendications 9 à 14, caractérisé en ce que l'étape b) est effectuée moins de 25 minutes après l'étape a).
  16. Procédé selon la revendication 14, caractérisé en ce que la laque de finition est sélectionnée parmi des laques de finition sur la base d'un système polyuréthane à un ou deux composants ou d'un système de polyol/résine mélamine.
  17. Procédé selon l'une des revendications 2 à 16, caractérisé en ce que la composition de revêtement est sélectionnée parmi des matériaux de revêtement solubles à l'eau.
  18. Procédé selon l'une des revendications 2 à 17, caractérisé en ce que la composition de revêtement est appliquée par une buse à plusieurs faisceaux ayant 1 à 6 rangées de chacune 5 à 500 buses.
  19. Procédé selon l'une des revendications 9 à 18, caractérisé en ce que l'épaisseur de couche du revêtement durci est de 40 à 170 pm.
  20. Procédé selon l'une des revendications 9 à 19, caractérisé en ce que le durcissement à l'étape c) est effectué à une température élevée.
EP20070012411 2006-06-27 2007-06-25 Dispositif et procédé destinés à l'application d'un revêtement liquide sur une surface Not-in-force EP1872864B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006029764A DE102006029764A1 (de) 2006-06-27 2006-06-27 Vorrichtung und Verfahren zur Aufbringung eines flüssigen Belags auf eine Oberfläche
DE200610060397 DE102006060397A1 (de) 2006-12-20 2006-12-20 Verfahren zum Herstellen eines entfernbaren Oberflächenschutzes
DE102006060398A DE102006060398A1 (de) 2006-12-20 2006-12-20 Verfahren zur Applikation einer Flüssigfolie nach wässriger Vorbehandlung der zu beschichtenden Oberfläche

Publications (3)

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EP1872864A2 EP1872864A2 (fr) 2008-01-02
EP1872864A3 EP1872864A3 (fr) 2008-09-10
EP1872864B1 true EP1872864B1 (fr) 2013-09-11

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EP20070012411 Not-in-force EP1872864B1 (fr) 2006-06-27 2007-06-25 Dispositif et procédé destinés à l'application d'un revêtement liquide sur une surface

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EP (1) EP1872864B1 (fr)
ES (1) ES2438567T3 (fr)
PT (1) PT1872864E (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000024976A1 (it) * 2020-10-22 2022-04-22 Vincenzo Penati Sistema per l’umettamento di fogli di carta

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857367A (en) 1987-10-16 1989-08-15 Thorn Brent A Method of and apparatus for spraying
DE3809517A1 (de) 1988-03-22 1989-10-05 Walter Swoboda Zerstaeubungseinrichtung fuer fluessigkeiten
JP2992760B2 (ja) * 1990-02-15 1999-12-20 ノードソン株式会社 ノズル孔より流出する液体又は溶融体をその周辺よりの気体噴出流により偏向分配する方法
US5418009A (en) 1992-07-08 1995-05-23 Nordson Corporation Apparatus and methods for intermittently applying discrete adhesive coatings
DE19736452C2 (de) * 1997-08-21 2003-08-28 Fraunhofer Ges Forschung Polymerer Schutzfilm, Verfahren zu seiner Herstellung, dessen Verwendung sowie Verfahren zum Schützen von Oberflächen
DE19854760C2 (de) 1998-11-27 2002-06-13 Audi Ag Verfahren zum Herstellen eines entfernbaren Oberflächenschutzes auf einer lackierten Kraftfahrzeugkarosserie
EP1028150B1 (fr) * 1999-02-10 2004-09-29 TUFTY GmbH Couche protectrice et brillante formée de polymères solubles dans l'eau pour préserver de la salissure
DE102004018597B3 (de) 2004-04-16 2005-12-01 Dürr Systems GmbH Applikationskopf zur Erzeugung einer Flüssigfolie

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EP1872864A2 (fr) 2008-01-02
EP1872864A3 (fr) 2008-09-10
ES2438567T3 (es) 2014-01-17
PT1872864E (pt) 2013-10-08

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