EP3554716A1 - Dispositif d'application et procédé d'application d'un agent de revêtement - Google Patents

Dispositif d'application et procédé d'application d'un agent de revêtement

Info

Publication number
EP3554716A1
EP3554716A1 EP17808874.6A EP17808874A EP3554716A1 EP 3554716 A1 EP3554716 A1 EP 3554716A1 EP 17808874 A EP17808874 A EP 17808874A EP 3554716 A1 EP3554716 A1 EP 3554716A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
nozzles
components
print head
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.)
Granted
Application number
EP17808874.6A
Other languages
German (de)
English (en)
Other versions
EP3554716B1 (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 EP3554716A1 publication Critical patent/EP3554716A1/fr
Application granted granted Critical
Publication of EP3554716B1 publication Critical patent/EP3554716B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B05B7/0846—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 jets being only jets constituted by a liquid or a mixture containing a liquid
    • 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
    • B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
    • B05B12/04—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for sequential operation or multiple outlets
    • 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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
    • 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
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/061—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with several liquid outlets discharging one or several liquids
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/1433—Structure of nozzle plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • 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
    • B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
    • B05B13/0452—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles the conveyed articles being vehicle bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2107—Ink jet for multi-colour printing characterised by the ink properties
    • B41J2/211—Mixing of inks, solvent or air prior to paper contact

Definitions

  • the invention relates to an application device for the serial application of a coating agent on surfaces of workpieces, in particular of motor vehicle bodies and / or their attachments, with a nozzle applicator hereinafter referred to as nozzle print head containing at least one nozzle or preferably a plurality of juxtaposed nozzles containing the coating agent applied as a con tinuous ⁇ rays or individual drops on the surface to be coated.
  • nozzle print head containing at least one nozzle or preferably a plurality of juxtaposed nozzles containing the coating agent applied as a con tinuous ⁇ rays or individual drops on the surface to be coated.
  • application device is meant a device to which besides the nozzle head in particular moved by a coating robot may belong further units such as the coating unit containing supply unit and possibly mixer, color changer and / or a rinsing device / or cleaning ⁇ method.
  • WO 2011/138048 AI for the production of paint drops by Schwingungsbeaufschla ⁇ tion of the coating agent known and allow the coating, namely painting of motor vehicle bodies practically without overspray, because the rays or drops can be directed precisely to the desired surface areas ⁇ who can.
  • the coating without overspray has losses the significant at ⁇ game as described in the said WO 2010/046064 AI advantages such as minimum Be Anlagenungsmaterialver- and simplification of the coating booth by Ver ⁇ zicht to the previously required steps of the overspray removal of a painting booth and / or from a Exhaust air flow.
  • the application efficiency of the printhead may be more than 80%, 90% or even 99%, and in the coating booth, the air sink rate during operation may be less than 0.3 m / s, 0.2 m / s, 0.1 m / s , 0.07 m / s or even 0.05 m / s.
  • An essential component of the nozzle pressure head can be a nozzle plate with openings formed in a plate plane which serve as nozzles.
  • US 9,108,424 B2 also discloses a jet print head having a row of ink jet nozzles for printing on a surface having predetermined patterns, which operates on the so-called drop-on-demand principle.
  • This principle is based on the use of electrical valves, wherein a magnetic valve needle is guided as a piston in a coil and raised by supplying power into the coil. This releases a valve opening so that the the fluid in question, in this case the ink, can emerge as drops of different sizes depending on the opening time.
  • This principle can also be used in the invention described here, however, unlike the prior art, not for ink.
  • the invention is therefore the object of the coating in particular building or on parts of motor vehicle bodies and in particular their total areas in the already proposed manner with virtually no overspray, depending ⁇ but to allow with any multi-component coating compositions.
  • the application device according to the invention initially has a nozzle applicator or nozzle pressure head for application of the coating agent to the component to be coated.
  • nozzle pressure head used in the context of the invention is to be understood generally and merely serves to delimit this nozzle applicator from all atomizers (for example rotary atomizers, air atomizers, airless atomizers, etc.), which produce a spray of the coating to be applied
  • atomizers for example rotary atomizers, air atomizers, airless atomizers, etc.
  • the nozzle Print head radially narrowly limited coating agent jets or drops, wherein the beam is generated continuously, ie in its longitudinal direction contiguous, while the drops are to fly in one and the same direction and to be separated in the direction of flight from each other.
  • the nozzle printhead contains only a single nozzle, which leads to the already mixed coating agent ⁇ , or only two nozzles, of which one nozzle outputs a first component and the other nozzle, a second component.
  • printheads with a large number of, for example, one or more parallel rows of nozzles are preferred.
  • the invention can be realized with all types of printheads or other nozzle applicators, which differ from conventional atomizers in the manner explained above.
  • At least one or two separate supply lines for components of the coating agent to be mixed are provided, which are provided in typical embodiments of the invention for the common supply of all nozzles of the print head with one and the same coating agent or its components. At least two separate supply lines lead to or into the nozzle head if the components are to be mixed there or only after leaving the nozzle. When the mixture, however, is to take place outside the nozzle on the print head ⁇ parent in a mixer, a transition leading from the off to the nozzle head conduit is sufficient.
  • the component ⁇ components are, in typical embodiments, at least one material component (z. B. stock paint) and min ⁇ least a reacting in a known manner with the material component for the curing hardener component.
  • the components remain separated at least as far as the nozzle printhead.
  • An essential advantage of the invention is the fact that for the first time the series-wise fully automatic surface coating, namely painting of complete motor vehicle bodies with arbitrary multicomponent coating agents (including effect paints) is made possible practically without overspray.
  • the nozzles of the printhead are the streams or drops of the coating composition or be ⁇ ner components to avoid overspray specifically draw attention to one zelne points of the surface to be coated.
  • the impact points applied in this case can adjoin one another or overlap one another, as will be described in more detail below.
  • nozzle print head on a multi ⁇ axis coating robot, which moves the nozzle print head over the surface to be coated.
  • this general ⁇ my known 6- or multi-axis painting robots are made with or without linear Mitfahrachse to the prior art in itself.
  • the invention is not limited to conventional robots having 6 or more rotary axes.
  • the nozzle applicator could, for example, be arranged on a linear unit which essentially has only linear axes for the purposefully program-controlled movement of the nozzle pressure head over the surface to be coated.
  • Such Linea pure ⁇ standardized could, for example, temporarily in the workpiece to be coated, such as vehicle bodies on a roof, or instead of On the conveyor (eg the usual skids) are placed and then would have the advantage that accuracy problems of conventional robotic and conveyor systems with respect to the positioning of the nozzle head relative to the workpiece can be avoided.
  • the OF INVENTION ⁇ dung for any multi-component coating composition such as 2K or 3K-paint is suitable (including basecoat and clearcoat paint), primer or priming agent, adhesive or like ⁇ processing agents, or preservatives etc each min ⁇ least have a base component and a hardener component which reacts with this.,.
  • the mixture of components may be performed in various ways and at different points of Ap forcesssys ⁇ tems.
  • the nozzle print head the at least two components to the surface to be coated len ⁇ ken that they mix separated from this.
  • the mixing of the components takes place in this case by the impact of the drops or jets.
  • the printhead it is possible for the printhead to simultaneously eject the components to be mixed.
  • the print head ejects the components to be mixed successively in time from, ie first the one and then the other component (Example ⁇ example first with the base coat, and then the hardener or vice versa). In both cases, the rays or drops strike at substantially the same location.
  • the mixing can also take place in flight, ie the nozzles of the print head are adjusted to each other so that the components are on to hit the path of the surface to be coated.
  • a entspre ⁇ chender distance between the nozzle and the print head to be ⁇ layer forming surface must be adhered by means of the coating robot.
  • the drop of the components of the means of Be Anlagenungs mit- so at different speeds and are ejected at different times to each other that the later ejected drop hits in flight on the first ejected Trop ⁇ fen and mixes with him.
  • the mixing can also take place on or in the nozzle print head, for example with a mixer, which can be designed in a manner known per se as a static or dynamic mixer.
  • the mixer may be arranged in or on the nozzle print head, for example integrated within the print head into a respective inflow channel of the nozzles, where it is connected to the at least two separate feed lines of the application device.
  • the individual nozzles of the nozzle print head can each be designed to mix the components.
  • the respective nozzles may contain at least two channels leading to a nozzle outlet, which in this exemplary embodiment may be concentric with one another, wherein the nozzle outlet may be formed by at least one annular gap and a central opening.
  • the nozzle outlet may be formed by at least one annular gap and a central opening.
  • each of the mentioned possibilities of mixing without mixer it may be appropriate to impart a twist to at least one of the components, but preferably both or all components, whereby they mix better. Constructive possibilities for this are readily available to the person skilled in the art. If the components are not mixed via a mixer, it may be necessary in the application of contiguous jets to ensure the mixing ratio of the two components via a volume flow control of the individual components. When applying drops, the mixing ratio can be determined by the volume of the drops z. B. be controlled by means of different opening times of the nozzles.
  • a mixer could according to another embodiment of the invention also be integrated outside the print head into the supply lines, preferably as close as possible to the nozzle print head or in the vicinity of a color changer.
  • the mixer has respective inputs to de ⁇ NEN it is connected to the at least two separate feed lines, while its output via a common line with the nozzle or nozzles is connected.
  • color changer controlled color change valve arrangements for selecting a desired color inks from a variety supplied different rather colors are generally known.
  • at least one color changer may be provided which is connected to at least one of the supply lines of the application device or the nozzle print head z. B. is connected for a Stammlackkompo- component.
  • the color changer may be suitably arranged movable, in particular to the moving nozzle printhead coating robot, for example, on one of its arms or on a Mitfahrachse of Robo ⁇ ters. The closer the color changer is to the jet print head, the lower the unavoidable loss of colorant and detergent during a color change.
  • the color changer can also be arranged stationarily on, for example, an inner or outer wall of the coating booth of the coating system considered here.
  • the nozzle head may be expedient ge through a die plate ⁇ forms containing as nozzles in a plane of the plate juxtaposed openings.
  • the nozzles can ⁇ preference, be arranged in one or more parallel rows, for example, as columns and rows of a matrix.
  • the longitudinal axes of the nozzles can in the case of corresponding embodiments of the invention run perpendicular to the plane of the plate. In other embodiments, however, the longitudinal axes of adjacent nozzles are inclined at different or equal, for example, opposite, equal angles to the plane of the plate.
  • the nozzles may be connected, for example, in the normal course of coating systems with program control disposed in or on the nozzle print head, if necessary, for example, on the nozzle plate electrical ⁇ 's or pneumatically controlled valves.
  • the control valves may, for example, have an electrically from a coil or pneumatically displaceable piston which closes or opens the nozzle depending on its position.
  • the nozzle head can be rinsed after a given time or duration of operation, approximately hourly or after several hours or at certain times of the day (shift or production end, weekend), etc. or after reaching a certain number of coated workpieces or after reaching a certain output. . .en amount of paint. It may be useful as well to flush the nozzles ⁇ print head after certain events of Be Schweizerungsbe- drive, for example, after each stoppage of a as usual, the vehicle bodies or other workpieces to be coated conveyed through a coating booth belt or other conveying means or after a predetermined number of conveyor shutdowns.
  • the rinsing signal-controlled after a predetermined period of time for example, due to an alarm or fault signal after a period of time after which the reaction of two components has progressed so far that the application system must be flushed to avoid damage.
  • the car body coating flushing can also occur in the so-called bodies gaps, so if waiting in the breaks after coating a car body of Ro boter to the next the promoted ⁇ th through the coating booth body.
  • the flushing can be controlled automatically from ⁇ dependence of time monitoring devices.
  • different rinsing agents can be used for cleaning.
  • each other detergents be useful for example in egg ⁇ nem change of the coating operation between solvent-Elba ⁇ sharim (2K) coating and water-based paint, wherein between the two detergents in addition, a release agent such. B. an alcohol can be used.
  • rinsing agents with different cleaning action can be used (cascading), for example for the reduction of VOC emissions (ie volatile organic compounds), if the content of organic solvent increases in the case of an aqueous rinsing agent.
  • VOC-free rinse is used. This may include programs that will he differ ⁇ applied in its program sequence and / or its Dau for different coatings different Spülpro-.
  • rinsing agent and pulse air can be alternately supplied in a manner known per se.
  • the rinsed paths may then emptied by compressed air and are ge ⁇ dried.
  • e may be useful to apply at least one drop or a de fined amount of the new coating agent or its components through the nozzle.
  • the flushing device provided for the described flushing operations may be formed by at least one flushing agent line leading into the application device parallel to the component feed lines, which may possibly be connected or connectable to all nozzles via a mixer or directly. If a color changer is present, a detergent line can be connected, for example, to an input of the color changer, so that the rinsing agent can be conveyed to the nozzle print head through the supply line z. B. for the parent lacquer component can be ⁇ leads. It is also conceivable a separate leading into the nozzle print head detergent line.
  • an external flushing device for example, which is arranged in the vicinity of the coating robot from accessing this separate flushing device may further be seen ⁇ in the coating system. If a storage ⁇ device for storing the nozzle pressure head in coating breaks is present in the coating system, the flushing device can also be integrated into the storage device.
  • the flushing device should preferably be formed out so that the nozzle channels and also the outer surface of the nozzle print head, so possibly the nozzle plate flushed who ⁇ can.
  • a backwashing of the nozzle plate or nozzle channels may be expedient, wherein the detergent from the outside is pushed inwards through the nozzle channel, for example, to clean a clogged nozzle.
  • the rinsing device For collecting all the fluids exiting during rinsing (from the nozzles), ie coating and rinsing agents and / or aerosols, the rinsing device can be provided with a corresponding catching device, from which they can then be separated off and disposed of.
  • dye or coating agent losses caused by a rinsing process should be limited to at least less than 10 l, but preferably to less than 5 l, 200 ml, 20 ml, 10 ml, 5 ml or even 2 ml, and the need for flushing is hereby limited to less than 10 1, but preferably less than 5 1, 2 1, 200 ml, 100 ml, 50 ml, 20 ml or even 10 ml.
  • nozzle printheads known from the prior art and only suitable for one-component varnish must be adapted to the requirements for two-component coating compositions.
  • the size, so hydraulic cross sections of the nozzles and their channels are to be sized according to the respective mixing ratio.
  • solvent-resistant materials should be used as possible, such as seals made of FFKM (ie perfluororubber).
  • Fig. 1 is a cross-sectional view through an inventive
  • FIG. 2 shows the schematic representation of two nozzles from ⁇ pushed components according to an embodiment of the invention
  • FIG Fig. 4 is a nozzle unit to be used in an embodiment of the invention.
  • the components to be painted on a conveyor 1 are transported at right angles to the plane through a spray booth 2, in which the components then from Lackier ⁇ robots in some manner known per se be painted.
  • the painting robots 3, 4 have two pivotable robot arms and each guide an application device via a multi- axis robot hand axis.
  • it may be robots with six or more rota ⁇ toric axes and possibly a linear driving axis along the conveying path.
  • Painting robots with at least seven rotary axes have the advantage in the vehicle body painting that in many cases can be dispensed with the expense of a driving axis.
  • an air suction are 10 which sucks the cabin air when required by a filter cover 11 passes downwardly from the cabin without the other expenses for collecting and Ab ⁇ part of overspray is required.
  • the air extraction comes out without a filter. This can also be done via arranged near the ground channels.
  • Fig. 2 illustrates an embodiment of the invention in which two components of the coating agent are mixed together only when hitting the surface to be coated by the impact of the drops or jets. These drops o- the beams generated by two schematically shown nozzles Dl and D2, the print head in a common plane of the nozzle are arranged next to one another, wherein the one SI ⁇ se a first component (z. B. master lacquer) and the other SI ⁇ se a second component (hardener) ejects.
  • z. B. master lacquer the print head in a common plane of the nozzle are arranged next to one another, wherein the one SI ⁇ se a first component (z. B. master lacquer) and the other SI ⁇ se a second component (hardener) ejects.
  • the ejection can take place chronologically one after the other or simultaneously at a time 1, and according to the painting distance L of the nozzles D1 and D2 from the surface F to be coated as well as the flying velocities of the components, the two components strike the surface F a little later at a point in time 2 at least approximately at one and the same point P, where they mix with each other.
  • ge ⁇ dashed lines shown discharge directions of the two nozzle Dl and D2 for example, equal and opposite angle or flight ß inclined to each other towards the nozzle against the surface to the area-painting distance L F vertical.
  • the size of the ge ⁇ selected flight angle depends ⁇ it clear also from the measured parallel to the surface F distance between the nozzles Dl and D2 from excluding from the painting distance L and can ⁇ example, between approximately 0 and 90 °.
  • the flight speeds and / or the flight angles of the two components can also be different from each other. If the nozzles D1 and D2 are opened at different times, a displacement movement of the nozzles can also be relieved. tively to the surface F during the application of the two components.
  • Fig. 3 illustrates schematically the overlapping application of coating points on the surface F to be coated, which are usually drops of already mixed components, which then in turn on the surface F by merging together. However, it could also be components that mix only on the surface F to be coated. While the
  • nozzles are moved along the surface F by the coating robot at the given travel speed, and at predetermined consecutive equally spaced times t1 to t5, etc., each generate a coating point, for example one drop at a time, of defined size a.
  • the respective nozzle is so-time ⁇ controls that defined drop distances b arise along the surface F, and thus the respectively desired overlap of the applied drops.
  • FIG. 4 schematically illustrates a nozzle unit 40 designed as a double nozzle for mixing two components of a coating agent (eg 2-component paint) in or on the nozzle print head.
  • the nozzle unit 40 consists essentially of an outer tubular body 41, in which, for example, a cylindrical inner space concentric, for example, a likewise cylindrical inner tube 42 is arranged. While FIG. 4B) shows a longitudinal section through this tubular nozzle unit 40, FIG.
  • FIG. 4A shows a plan view of the lower nozzle end side in FIG. 4B).
  • the outer tube body 41 can, as shown, project outwardly beyond the inner tube 42 on the nozzle end face 43.
  • one component of the coating agent eg master lacquer
  • the second component eg hardener
  • the first-mentioned component could also be passed through the annular gap and consequently the second component through the inner tube.
  • the mixing of the components is carried out in the example considered here on the end face 43 of the illustrated double ⁇ nozzle or nozzle assembly 40, ie, at its outlet, where the mix drops darstellunsclean each formed there with each other. It may be expedient when the respective drop formation does not begin at the same time, but the two nozzle members, so the inner tube 42 and formed as Ringspaltdü ⁇ se outlet 46 (not shown) valves are timed so that first the droplets on the inner tube nozzle and only then the drop is formed at the annular gap nozzle. The reverse order may be appropriate. Instead, however, a simultaneous opening of the two nozzle elements is conceivable.
  • the SI ⁇ send jerk head according to the invention preferably holds a plurality of such Düsenein ⁇ units which may be arranged in particular in a reasonable or more rows.
  • FIG. 4 illustrates a double nozzle unit using the example of droplet formation
  • double nozzles are also conceivable for the production of component jets which are miscible at the nozzle outlets.
  • the two nozzle elements can be controlled by associated controllable valves together and / or individually with respect to their opening times.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Robotics (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Spray Control Apparatus (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne un dispositif d'application pour l'application en série d'un vernis ou d'autres agents de revêtement sur des carrosseries de véhicules automobiles ou sur des pièces rapportées de celles-ci. Le dispositif présente une tête de pression à buses (8, 9), qui contient une pluralité de buses agencées par exemple en une ou plusieurs rangées, lesquelles appliquent l'agent de revêtement sous la forme de jets continus ou de gouttes individuelles sur la surface à revêtir. La tête de pression à buses est agencée sur un robot de revêtement multiaxes (3, 4). Contrairement aux dispositifs d'application de ce type connus jusqu'à présent, l'agent de revêtement est constitué d'au moins deux composants à mélanger ensemble, tels que par exemple le vernis 2K-Lack, qui sont amenés à la tête de pression à buses (8, 9) par l'intermédiaire de conduites d'amenée séparées pour l'alimentation commune des buses.
EP17808874.6A 2016-12-14 2017-12-01 Dispositif d'application et méthode d'application d'un produit de revêtement Active EP3554716B1 (fr)

Applications Claiming Priority (2)

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DE102016014919.1A DE102016014919A1 (de) 2016-12-14 2016-12-14 Applikationsvorrichtung und Verfahren zum Applizieren eines Beschichtungsmittels
PCT/EP2017/081123 WO2018108573A1 (fr) 2016-12-14 2017-12-01 Dispositif d'application et procédé d'application d'un agent de revêtement

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EP3554716A1 true EP3554716A1 (fr) 2019-10-23
EP3554716B1 EP3554716B1 (fr) 2021-08-18

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JP (1) JP6991218B2 (fr)
CN (1) CN110087779B (fr)
DE (1) DE102016014919A1 (fr)
ES (1) ES2896964T3 (fr)
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CN114682464B (zh) * 2022-04-24 2023-09-26 许艳青 木质家具的漆饰方法、漆饰装置及其家具

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EP3554716B1 (fr) 2021-08-18
WO2018108573A1 (fr) 2018-06-21
CN110087779B (zh) 2022-02-22
DE102016014919A1 (de) 2018-06-14
JP6991218B2 (ja) 2022-01-12
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JP2020501887A (ja) 2020-01-23

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