WO2011057786A1 - Dispositif d'application pour l'application et l'irradiation d'un agent de revêtement durcissable par rayonnement - Google Patents

Dispositif d'application pour l'application et l'irradiation d'un agent de revêtement durcissable par rayonnement Download PDF

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Publication number
WO2011057786A1
WO2011057786A1 PCT/EP2010/006881 EP2010006881W WO2011057786A1 WO 2011057786 A1 WO2011057786 A1 WO 2011057786A1 EP 2010006881 W EP2010006881 W EP 2010006881W WO 2011057786 A1 WO2011057786 A1 WO 2011057786A1
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WO
WIPO (PCT)
Prior art keywords
radiation
coating agent
application device
coating
section
Prior art date
Application number
PCT/EP2010/006881
Other languages
German (de)
English (en)
Inventor
Dietmar Wieland
Konrad Ortlieb
Wolfgang Tobisch
Hans-Georg Fritz
Frank Herre
Original Assignee
Dürr Systems GmbH
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 Dürr Systems GmbH filed Critical Dürr Systems GmbH
Priority to EP10779713.6A priority Critical patent/EP2498919B1/fr
Publication of WO2011057786A1 publication Critical patent/WO2011057786A1/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
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/40—Construction elements specially adapted therefor, e.g. floors, walls or ceilings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/60—Ventilation arrangements specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1064—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • 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
    • 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
    • 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
    • B05B13/0457—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles specially designed for applying liquid or other fluent material to 3D-surfaces of the articles, e.g. by using several moving spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1092—Means for supplying shaping gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0426—Means for supplying shaping gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/047—Discharge apparatus, e.g. electrostatic spray guns using tribo-charging
    • 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 invention relates to an apparatus and a method for applying a radiation-curable coating composition to a surface to be coated. Furthermore, the invention relates to associated coating agent application components.
  • an exposure space which can irradiate painted components with a plurality of UV lamps.
  • the exposure room includes a floor, a ceiling, two side walls, a front wall and a back wall, all of which are provided with multiple UV emitters.
  • a disadvantage of the exposure space is in particular that certain areas to be irradiated can not be optimally irradiated by means of the radiators. This is particularly problematic for geometrically complex objects, such as motor vehicle body components, the undercuts, depressions, curved sections, cavities, etc., which by means of the above-described exposure space often can not be sufficiently accurately irradiated. So it may be that certain areas too strong, others in turn are under-irradiated, which can lead to a reduced surface quality.
  • a further disadvantage is that separate application and irradiation components as well as separate paint application and exposure chambers are required from each other. Furthermore, two separate steps are required, namely the application of paint and subsequent curing by means of UV lamps. This is associated with a relatively high time, energy and cost.
  • the object of the invention is to provide an improved application device and an improved method for applying a radiation-curable coating agent to a surface to be coated.
  • a radiation-curable coating agent for applying a radiation-curable coating agent to a surface to be coated.
  • the irradiation of the coating composition should be effective, homogeneous and / or uniform.
  • the time and cost for the application and curing of the coating composition should be reduced.
  • the invention comprises the general technical teaching of a radiation-curable coating composition before coating. fen strike a surface to be coated with radiation to b to achieve an effective, homogeneous and / or uniform ge curing of the coating composition.
  • the application device according to the invention for applying a radiation-curable coating composition to a surface to be coated is characterized in particular by an application unit for dispensing the coating agent and at least one radiation delivery section for emitting radiation, wherein the at least one radiation delivery section is configured and arranged such that the coating agent comes into contact with the radiation before impinging on the surface to be coated. There may be a single or a plurality of radiation delivery sections.
  • lacquers are used as coating materials.
  • the radiation used can be actinic radiation (photocatalytically active radiation), corpuscular radiation (for example electron beam curing), wave radiation, radioactive radiation
  • radiation sources for generating radiation for example, gas discharge lamps, photodiodes, ultraviolet light emitting diodes and other commercially available radiation sources may be used, e.g. Mercury vapor high / medium pressure radiators, metal halide radiators, crossover vapor high / low pressure lamps, microwave excited electrodeless lamps, capillary emitters, etc.
  • a further advantage is that the application and irradiation of coating agent can be carried out substantially simultaneously, without the requirement of the spatial separation of application and irradiation spaces or of application and irradiation components.
  • This technique of irradiation of the lacquer, before it has reached the substrate> is preferably possible in connection with coating systems, which preferably have a delayed curing after irradiation. These include, for example, coating systems based on cationic photoinitiators or photolatent bases. Furthermore, this technique is applicable for radical Fotoinitiation, which usually runs very fast. Reflective means may be provided to reflect the radiation onto the coating agent and / or to reflect back to the coating agent, resulting in more effective irradiation.
  • the reflector means preferably comprise aluminum.
  • the at least one radiation delivery section can be provided in the application device, in a metering device for metering the coating agent (for example a gear metering pump, a piston metering device, etc.) in the application unit, preferably in one
  • Paint tube of a rotary atomizer wherein, for example, a module (eg a mixer) for surface enlargement and / or mixing of the coating agent in the paint tube and / or at another suitable location in the application unit may be provided on the application unit, preferably on or in an end face of a Rotationszerstäubers, which faces a surface to be coated during operation of the rotary atomizer, in particular on a steering gas ring and / or onhorizonaufladungsstoffn to the outside charging the coating agent, on a bell cup for a rotary atomizer, on a distributor disk for a rotary atomizer, on a steering gas ring of a rotary atomizer, in a coating agent line for supplying the coating agent to the application unit, and / or on or in a coating agent line for supplying the coating agent the application unit.
  • a module eg a mixer
  • a module for surface enlargement and / or mixing of the coating agent in the paint tube and / or at another
  • the at least one radiation delivery section comprises at least one radiation-transmissive section.
  • the radiation-transmissive section can emit radiation over a large area.
  • the radiation coupling-in area for introducing radiation into the radiation-transmissive section can be many times smaller than the area for emitting radiation onto the coating device.
  • the surface for emitting radiation is, for example, but not limited to, the surface of a mixer described below, the inner circumferential surface of a closed-walled portion through which coating agent flows, or the coating medium overflow surface of a bell cup. It is possible to couple one or more radiation conductors to the at least one radiation delivery section and / or the at least one radiation-transmissive section.
  • the radiation-transmissive section may surround a section to be flowed through by coating means in order to emit radiation substantially uniformly inwards over its preferably closed inner circumference.
  • the radiation-transmissive section is preferably closed-walled in cross-section in order to irradiate coating material flowing through it over its substantially entire inner circumference.
  • the radiation-transmissive section thus preferably has a closed inner peripheral surface.
  • the radiation-transmissive portion is a substantially tubular portion, annular portion, or any other closed-walled portion provided to uniformly emit radiation preferably radially inward over substantially its entire inner circumference.
  • the radiation-transmissive portion comprises a radiopaque outer region and a radiation-transmissive inner region.
  • the radiopaque outer portion and the radiopaque inner portion are preferably provided on the tubular portion so that the inner portion may be a radially inner portion and the outer portion may be a radially outer portion.
  • a radiation conductor such as a light guide, glass fibers, etc.
  • a radiation conductor can be coupled to the radiation-transmissive section to transmit the radiation-transmissive portion. supply the radiation with radiation.
  • the radiation-transmissive portion may be provided so that radiation may propagate in its longitudinal direction and circumferential direction.
  • the radiation-transmissive inner region is provided so as to allow transmission of a portion of the radiation inwardly toward the through-flowing coating agent, whereas the radiopaque outer region may preferentially reflect a portion of the radiation inwardly toward the radiation-transmissive inner region.
  • the radiation-transmissive section can deliver radiation to the coating medium flowing through it over its essentially entire inner circumference, and, on the other hand, that the radiation-permeable section has a sufficiently long extent in the flow direction of the coating medium. to further improve the homogeneity and / or uniformity of the irradiation.
  • the at least one radiation-permeable section is preferably provided on or in a color tube in the application unit, for example in a rotary atomizer, but may also be provided in a coating agent line for supplying the coating agent to the application unit.
  • An advantage of positioning in the application unit is the short time and space between irradiation and application of the coating agent.
  • the at least one radiation delivery section has at least one radiation conductor, such as a light guide, glass fibers, etc., which projects into a portion of the application device to be flowed through by coating means, for example into a paint tube in the application unit and / or into one coating supply line for supplying the coating agent to the application unit.
  • coating means for example into a paint tube in the application unit and / or into one coating supply line for supplying the coating agent to the application unit.
  • At least two radiation conductors are provided which protrude differently far into the section to be flowed through by the coating agent.
  • the radiation conductors can project into the section through which the coating agent flows so that they are distributed essentially uniformly over the flow cross section of the coating agent.
  • a module for surface enlargement and / or mixing of the coating agent may be provided which is positioned in a portion of the application device to be flowed through by coating means, preferably in a coating line for supplying the coating agent to the application unit and / or in the application unit, for example in a paint tube of a rotary atomizer.
  • the module is radiation-transmissive.
  • the module is thus a radiation-transmissive section.
  • the module may be configured to deliver radiation to the coating agent. It is possible to couple a radiation conductor, such as an optical fiber, glass fibers, etc., to the module to provide the module with radiation so that it can deliver the radiation to passing coating agent.
  • a radiation conductor such as an optical fiber, glass fibers, etc.
  • the advantage of this is that the module essentially over its entire surface Can irradiate coating agent, resulting in a particularly effective, homogeneous and / or uniform irradiation.
  • the module may be a mixer, in particular a static mixer, preferably a Kenics mixer (eg spiral, vortex or grid system).
  • a mixer suitable for the invention could preferably be produced by means of a generative method (for example rapid prototyping, eg laser sintering, laser melting, etc.).
  • the application unit comprises an atomizer, preferably a rotary atomizer. It is preferred that the atomizer has an end face, which preferably has a steering gas ring and faces the surface to be coated during operation of the application device, a distributor disc, a bell cup, a color tube and / or external charging means.
  • the at least one radiation delivery section and / or the at least one radiation-transmissive section in the metering device, on or in the end face, on the distributor disc, on the bell cup, in or on the color tube, and / or on the external charging means ,
  • a radiation delivery to the coating agent is preferably carried out in the metering device, on or in the frontal side surface, through the distributor disc, through the bell cup, preferably the coating agent overflow surface, through the color tube, and / or through the external charging means.
  • the end surface, preferably the steering gas ring, the distributor disc, the bell cup, the external charging means, and / or the paint tube are made of radiation-permeable material.
  • the radiation delivery section may be provided on or in the front surface such that the radiation is directed substantially at the bell cup, the radiation is directed substantially directly at a coating agent spray, and / or the radiation is substantially atop one already at coating surface applied coating agent is directed.
  • the radiation delivery section or sections may be arranged immovably on the end face or may be arranged to be movable relative to the application unit.
  • the radiation delivery sections are provided in an annular arrangement on the frontal surface. For example, photodiodes, UV light-emitting diodes, etc., or openings, to which radiation means
  • Radiation conductors are brought to be annularly distributed around a coating agent outlet opening of the application unit.
  • An advantage of irradiation in the region of the distributor disk, of the bell cup, above all on the coating medium overflow surface of the bell cup, by the external charge agent, and / or in flight (in the air) of the coating agent is that the coating agent is present over a large area there so that irradiation is particularly effective can act on the coating agent to achieve an effective, homogeneous and / or uniform irradiation.
  • the paint tube preferably of a rotary atomizer, in such a way that radiation is directed from the paint tube to the distributor plate and / or radially inward to the coating medium flowing through.
  • the steering gas ring comprises steering gas nozzles for the release of inert gas and / or air.
  • the gas nozzles are provided in an annular arrangement on the front surface.
  • the emitted inert gas serves, on the one hand, to prevent unwanted reactions with constituents of the normal atmosphere and, on the other hand, to form the spray jet emitted by the bell cup.
  • the gas nozzles may be directed to the bell cup or to the spray jet. It is also possible to direct the gas nozzles on a spray edge of the bell cup, which would contribute to atomization of the coating agent.
  • an inert gas for example, as an inert gas
  • Nitrogen, carbon dioxide, water vapor, a noble gas or a polymeric gas which may be provided in an inert gas reservoir. Further, means for cooling inert gas may be provided to ensure that the inert gas at a lower temperature than the surface to be coated meets the surface to be coated. This advantageously leads to a fogging of the surface to be coated with inert gas.
  • the application unit, the at least one radiation delivery section, and / or the metering device on or in a movable robot arm, preferably at the free end of the mobile robot arm.
  • the robot can position the application unit and / or the radiation delivery means exactly and predefined on the surface to be coated or on the surface to be coated, wherein preferably also the radiation dose, the radiation intensity, the radiation angle and other parameters are controllable for which appropriate control units can be provided.
  • This makes possible an exact, substantially precise and predefined irradiation and / or application even of complex three-dimensional objects, as are customary, for example, in motor vehicle body construction.
  • the radiation delivery section (s) may be a radiation source for generating radiation, i. "Active" generate radiation.
  • the radiation delivery section or sections can be provided with radiation, preferably by coupling the radiation delivery section (s) to at least one remotely positioned radiation source via at least one radiation conductor or, for example, by the radiation delivery section (s) of a radiation source Radiation source to be illuminated.
  • the radiation is thus generated “actively” from a remotely located radiation source, whereas the one or more Radiation delivery sections, although emitting radiation, but not generate "active".
  • a radiation source such that its heat output does not adversely affect the coating agent
  • to provide insulators to thermally separate the radiation unit from the coating agent to provide means for cooling the radiation source
  • to position the radiation source such that its radiation source Heat release can act on the coating agent to lower its viscosity or to accelerate its curing reaction, and / or provide means for heating the coating agent to temper the coating agent to influence its curing reaction.
  • the application device may include a paint booth.
  • the paint booth can be operated in recirculation mode with inert gas or under vacuum.
  • the inner walls of the paint booth may be configured as area radiators to further irradiate pre-irradiated coating agent, and / or may further be provided in the paint booth a movable robot having a radiation source to further irradiate pre-irradiated coating agent.
  • a radiation-conductive or radiation-transmissive plastic can for example be used, such as PLEXIGLAS SUNACTIVE ® XT or PLEXIGLAS SUNACTIVE ® GS from Röhm, quartz, quartz glass, special UV-transparent glass, eg quartz glass GE 021A1 from Momen- tive Performance Materials, etc .. Also plastics that are used in the production of the above-mentioned parts by means of stereolithography can be used.
  • the invention extends the field of application of radiation-curable coating compositions.
  • the invention finds application in pigmented paints as coating agents.
  • Pigmented coatings usually have such a high layer thickness on the surface to be coated that adequate irradiation can not be achieved with conventional radiation methods (because of the pigmentation), since the radiation does not reach the bottom. Due to the irradiation according to the invention and optional subsequent irradiation, radiation curing can now also be used with pigmented paints.
  • the crosslinking of two or more layers of paint is possible.
  • a first basecoat (BC1) and a second basecoat (BC2) can be applied without prior irradiation and the subsequent clearcoat (CC) is irradiated and applied according to the invention.
  • This also requires irradiation of the painted surface.
  • the invention also allows irradiation of coating agent in one, two or more stages or with a plurality of predefined parameters, such as radiation dose, radiation intensity, radiation angle, etc., whereby specifically different degrees of crosslinking can be generated.
  • a "light" irradiation is usually sufficient in or on the application unit for rather lightly loaded surfaces (eg inner surfaces such as a door entry in a motor vehicle body component.)
  • Particularly stressed surfaces eg outer surfaces of a motor vehicle body component
  • the painting of the interior of a body with a paint system based on latent bases could be done (these are not as high quality as acrylate systems, but require significantly less irradiation) and then cured according to the invention.
  • the subsequent higher-quality outer coating with acrylate systems can be conventional (without irradiation during painting) and can then be cured, for example, with conventional UV lamps.
  • the advantage of this is that the outdoor area, which is more heavily stressed but can also be better reached with UV lamps, is protected very well with the high-quality acrylate system and the interior area with the latent-base system is sufficiently protected and yet effective (Even in poorly accessible areas) can be crosslinked with the application of the invention.
  • Monocure systems are those that are only (exclusively) cured by radiation. In conventional spray booths, including curing, such monocure systems could not be used satisfactorily on substrates with pronounced "shadows" (areas which are not sufficiently accessible with conventional UV lamps) .
  • the use of monocure systems requires particularly effective irradiation the invention can be guaranteed.
  • the invention provides a universal applicator for applying and irradiating radiation-curable coating compositions, which can respond to a wide variety of requirements such as radiation dose, radiation intensity, complex objects to be coated, various coating agents, etc., which has hitherto not been possible with conventional application apparatus was. Further advantages are the low emissions of volatile organic compounds (VOC emissions) and the low energy requirement.
  • VOC emissions volatile organic compounds
  • the invention finds particular application in the painting of motor vehicle body components (also Modullackie- ments).
  • the invention is also applicable to, for example, the rail, aircraft, marine and / or wind energy industries (e.g., rotor blades).
  • the invention can also be used in medical technology (eg germ-resistant UV coatings), in construction (eg facade elements made of polymers with UV coatings), in the field of organic photovoltaics (eg UV-curing individual coatings), etc. be set.
  • the radiation can also be introduced into isolated (high-voltage) atomizers via suitable materials, for example with the aid of radiation and / or light guides, battery operation, potential-separated power supply similar to an electric turbine, etc.
  • the invention encompasses all radiation-curable coating compositions, preferably paints, as well as all suitable coating methods, preferably coating methods, sometimes including flooding and the inkjet method. Furthermore, the invention also includes an associated method for the application device described above.
  • the method is characterized in particular by the fact that at least one radiation delivery section brings the coating agent into contact with the radiation before impinging on the surface to be coated.
  • the invention also encompasses associated coating agent application components, in particular rotary atomizer components, preferably a bell cup, a distributor disk, a color tube, external charging agent for external charging of the coating agent, a module for increasing the surface area and / or mixing of a coating agent, and / or a metering device.
  • the coating agent application component may be made of radiation-transmissive material or at least have radiation-transmissive material.
  • a radiation-permeable plastic can be used, such as PLEXIGLAS SUNACTIVE ® XT or PLEXIGLAS SUNACTIVE ® GS from Röhm, quartz, quartz glass, special UV-transparent glass, eg quartz glass GE 021A1 from Momentive Performance Materials, etc .. Also plastics that are used in The production of the above-mentioned parts by means of stereolithography can be used.
  • the radiation delivery section, the at least one radiation-transmissive section, the coating agent application component, the bell cup, the distributor plate, the color tube, sections of the frontal surface, the external charging means, the module, and / or sections of the metering device are, in particular, permeable to radiation by actinic radiation.
  • radiation photocatalytic radiation
  • ultraviolet Radiation e.g. ultraviolet Radiation
  • corpuscular radiation e.g electron beam curing
  • radioactive radiation e.g., radioactive radiation.
  • Fig. 1 is a schematic representation of a longitudinal section of a radiation delivery section to be arranged in an application device according to a first embodiment of the invention
  • FIG. 2 is a schematic representation of a cross section of the radiation delivery section taken along line L1-L1 in FIG. 1;
  • FIG. 3 is a schematic representation of a radiation delivery section projecting into a coating center line according to a second embodiment of the invention.
  • FIG. 4 is a cross-sectional view of a part of an application unit to be arranged in an application device according to a third embodiment of the invention.
  • FIG. 5 shows a schematic representation of a plan view of an end face of the application unit along line L2-L2 in FIG. 4;
  • Fig. 6 is a schematic representation of a mixer to be arranged in an application device according to a fourth embodiment
  • Fig. 7 is a cross-sectional view of a portion of an application unit to be arranged in an application device according to a further embodiment of the invention.
  • 1 shows a schematic representation of a longitudinal section of a radiation delivery section 10 for emitting radiation S to be arranged in an application device according to a first exemplary embodiment of the invention.
  • the radiation delivery section 10 comprises a radiation-transmissive section 11.
  • the radiation delivery section 10 or the radiation-transmissive section 11 is provided substantially tubular or annular and comprises a radiation-impermeable radially outer region IIA and a radiation-transmissive radially inner region IIB.
  • FIG. 1 shows a section A to be flowed through by coating agent B.
  • Arrow PI shows the flow direction of the coating agent B.
  • the section A has an inlet for the coating agent B and an outlet for the coating agent B and is closed-walled in cross-section limited radiation-permeable portion 11, on the one hand to allow flow through the coating agent B and on the other hand to completely enclose the coating agent B in the circumferential direction.
  • the section A is bounded in the circumferential direction by the radiation-permeable inner region IIB.
  • the radiation delivery section 10 can be positioned at any position between a coating agent reservoir and an outlet opening of an application unit, wherein a position close to the outlet opening is to be preferred in order to minimize the distance between the irradiation location and the outlet opening for the coating agent B or the surface to be coated.
  • a radiation conductor 12, preferably a light guide, is coupled on the one hand to the radiation-transmissive section 11, and on the other hand to a radiation source, preferably a light source.
  • the radiation delivery section 10, in particular the radiation-transmissive section 11 can be supplied with radiation S in order to deliver it to the coating agent B.
  • the radiation source and the radiation delivery section 10 are thus positioned away from each other.
  • FIG. 2 shows a schematic representation of a cross section of the radiation delivery section 10 along line L1-L1 in FIG. 1.
  • the section A, the radiation-transmissive section 11, the radiopaque radial outer zone IIA and the radiation-transmissive radially inner zone IIB are shown in FIG the coating agent B is traversed to see.
  • the emission of radiation S takes place over the entire inner circumference of the radiation-transmissive radially inner region IIB into the section A to be flowed through by the coating agent B.
  • the radiation delivery section 10 or the radiation-transmissive section 11 is supplied with radiation S via the radiation conductor 12 in order to irradiate the coating agent B.
  • Trains- Radiation S propagates in the radiation-transmissive section 11 in its longitudinal direction P2 and its circumferential direction P3 by being partially reflected between the radiation-impermeable radially outer region IIA and the radiation-transmissive radially inner region IIB. In this case, part of the radiation S can escape from the radiation-permeable radially inner region IIB and act on the coating agent B.
  • the radiation-transmissive portion 11 is designed so that it can emit radiation S over its entire inner peripheral surface and over its entire longitudinal extent.
  • the through-flowing coating agent B can also be fully irradiated in the circumferential direction, and not only from one or two sides, whereby it is possible to effectively, homogeneously and / or uniformly irradiate the through-flowing coating agent B over the entire flow cross-section.
  • a further advantage is that a radiation coupling surface 13 shown in FIG. 1 for introducing the radiation S into the radiation-transmissive section 11 is many times smaller than the surface for emitting the radiation onto the coating agent B. That is to say in the first exemplary embodiment Radiation coupling surface 13 is many times smaller than the inner peripheral surface of the tubular radiation-transmissive portion 11th
  • FIG. 3 shows a schematic representation of a radiation delivery section 20 protruding into a section A to be flowed through by coating agent B in accordance with a second exemplary embodiment of the invention.
  • Arrow PI indicates the flow direction of the coating agent B.
  • the radiation delivery section 20 comprises a radiation conductor 20A, from which four further radiation conductors 20B, 20C, 20D and 20E protrude into the section A.
  • the radiation conductors 20B, 20C, 20D and 20E each have a radiation exit opening at their free end in order to irradiate the coating agent B. Similar to the first embodiment, the radiation delivery section 20 is connected to a radiation source via a radiation conductor 20A.
  • Radiation conductors 20B, 20C, 20D and 20E protrude at different distances into section A in order to ensure effective, homogeneous and / or uniform irradiation over the flow cross-section of coating agent B.
  • substantially punctiform irradiations of the coating agent B occur, due to the arrangement of the radiation conductors 20B, 20C, 20D and 20E in the section A through which coating agent B flows, effective, homogeneous and / or uniform irradiation of the coating composition B be achieved.
  • the inner surface of the section to be flowed through by the coating agent B prefferably provided, at least in regions, with a reflector, e.g. a mirror coating, an aluminum layer, etc. to provide.
  • a reflector e.g. a mirror coating, an aluminum layer, etc.
  • the application unit 35 is preferably around a rotary atomizer.
  • the rotary atomizer 35 includes a plurality of radiation emitting portions 30, such as a bell cup 30A, a distributor disk 30B, a plurality of radiation means 30D and a paint tube 30C.
  • the radiation means 30D are provided on or in an end surface 31 and directed towards the bell cup 30A (in another embodiment, the radiation means may also be provided so as to be directed directly onto a coating agent spray and / or directly onto the surface to be coated), to provide this with radiation S for delivery to the coating agent B.
  • a steering gas ring 32 is further provided with gas nozzles 32A.
  • the bell cup 30A and / or the distributor disc 30B are at least partially radiation-permeable.
  • the color tube 30C is coupled to a radiation source to be supplied with radiation S.
  • the paint tube 30C is directed to the distributor disc 30B to provide it with radiation S for delivery to the coating agent B.
  • the emission of radiation to the coating agent B thus takes place through the bell cup 30A, preferably via the coating medium overflow surface of the bell cup 30A, and through the distributor disk 30B.
  • the radiation means 30D are arranged in an annular arrangement on the front face 31 around the bell cup 30A.
  • the radiation means 30D are supplied with radiation S via a respective radiation conductor in order to emit the radiation in the direction of the bell cup 30A.
  • the Radiation means 30D and the radiation source are thus positioned away from each other. This is particularly advantageous when the application unit 35 is to be arranged at the free end of a robot arm, since the weight at the free end of the robot arm can be kept low, which is advantageous for the sensitive robot dynamics.
  • the radiation means 30D as radiation sources for generating radiation S directly on the application unit 35, preferably on or in the frontal area 31.
  • the radiation means 30D are directed in Figure 4 on the Bell TEL ler 30A to irradiate this. Since the bell cup 30A is at least partially radiation-permeable, the coating on the coating medium surface of the bell cup 30A located coating B is mainly irradiated over a large area to ensure effective, homogeneous and / or uniform irradiation. It is also possible to provide the radiation means 30D arranged on or in the end face 31 such that radiation S is directed essentially directly onto a coating spray jet and / or to provide the radiation means 30D arranged on or in the front face 31, the radiation S is directed substantially onto a coating agent B already applied to the surface to be coated.
  • the radiation means 30D should preferably be positioned radially outside the outer edge of the bell cup, as shown schematically in FIG. 4 by the arrow P ', the radiation means 30D' and the radiation S ', in which case Radius R2 of the radiation means arrangement is greater than the radius Rl of the steering gas nozzle arrangement (see FIG. 5).
  • the steering gas ring 32 is further provided with the gas nozzles 32A for the release of inert gas G.
  • the application device may comprise an inert gas reservoir.
  • the inert gas G discharged from the steering gas nozzles 32A serves, on the one hand, to form the coating agent B and, on the other hand, to prevent undesired reactions with constituents in the normal atmosphere.
  • the steering gas nozzles 32A are arranged so that the inert gas G is directed to the outer surface of the bell cup 30A and / or the peripheral outer edge of the skirt of the bell cup 30A.
  • further radiation delivery sections can be provided, whose emitted radiation is directed to the coating agent spray and / or to the surface to be coated.
  • the coating agent B in flight so between the outer edge of the bell cup 30A and the surface to be coated, are irradiated.
  • Fig. 5 which shows a schematic representation of a plan view of the end face 31 along line L2-L2 in Fig. 4, the gas nozzles 32A and the radiation means 30D are annular and concentric with each other, the radius R1 of the steering gas nozzle arrangement is greater than the radius R2 of the radiation medium arrangement.
  • an arrangement may be chosen in which the radius Rl is smaller than the radius R2 or the radius Rl is the same size as the radius R2.
  • the application unit 35 is preferably arranged on or in a free end of a movable robot arm, so that the coating agent B and / or the radiation S can be directed onto the surface to be coated with sufficient accuracy.
  • external charging agents are usually used to externally charge the coating agent.
  • the external charging means external charging fingers
  • the external charging means usually have
  • the fastening means usually project from the end face of an application unit, preferably a rotary atomizer, in the manner of a finger, and are usually arranged at uniform angular intervals around a coating agent outlet opening of the application unit.
  • the electrodes are positioned at the free ends of the attachment means to electrically charge the coating agent.
  • the radiation delivery section 40 has a schematically indicated module 41 for surface enlargement and / or mixing of coating agent B, which is arranged in a section A to be flowed through by coating agent B.
  • the module 41 is preferably a Kenics mixer, which may for example be arranged in a paint tube of a rotary atomizer.
  • the mixer 41 is made of radiation-permeable material and thus constitutes a radiation-transmissive section.
  • Lung conductor 42 preferably a light guide, to see, on the one hand coupled to the mixer 41 and on the other hand to a radiation source, preferably a light source is coupled.
  • the mixer 41 can be supplied with radiation to deliver it to the coating agent B.
  • the mixer 41 is designed so that it can emit radiation over its substantially entire surface. It is advantageous that a radiation coupling surface 43 for introducing radiation into the mixer 41 is many times smaller than the surface for emitting the radiation to the coating agent B. That is, in the fourth embodiment, the light coupling surface 43 is many times smaller than the surface of the mixer 41.
  • the irradiation of the coating agent B can take place extremely effectively, homogeneously and / or uniformly on the one hand due to the surface enlargement and / or the mixing and on the other hand due to the large-area emission of radiation from the mixer 41.
  • FIG. 7 shows a cross-sectional representation of a part of an application unit 35 'which is to be arranged in an application device according to a further exemplary embodiment of the invention.
  • the application unit 35 ' is preferably a rotary atomizer.
  • Figure 7 shows a portion of a bell cup 30A '.
  • the bell cup 30A ' in particular in the region of the coating medium overflow surface of the bell cup
  • At least one radiation delivery section 30' is provided in order to apply the radiation S to the coating agent B before it encounters the surface to be coated.
  • the radiation delivery section 30 ' may extend substantially over the entire coating agent overflow area. However, the radiation delivery section 30 'can also be provided only in sections on the coating medium overflow surface.
  • the radiation delivery section (s) 30 'provided in the region of the coating agent overflow surface may be provided to generate radiation itself ("active") .It is also possible that the radiation delivery section (s) 30' be from a remote positioned radiation source Radiation to be applied to the coating agent B.
  • the bell cup 30A 'except for the radiation delivery portions 30' is made of a non-transparent material.
  • the radiation delivery section 30 ' may, for example, also be provided on the bell cup 30A' as shown by the dashed line shown in FIG. 7, ie penetrate the bell cup at least in sections.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un dispositif d'application pour appliquer un agent de revêtement durcissable (B) par rayonnement (S) sur une surface à revêtir, comportant une unité d'application (35) pour distribuer l'agent de revêtement (B) et au moins une partie d'émission de rayonnement (10, 20, 20A-20E, 30, 30A-30D, 40) pour émettre un rayonnement, la ou les parties d'émission de rayonnement (10, 20, 20A-20E, 30, 30A-30D, 40) étant prévues de telle manière que l'agent de revêtement (B) entre en contact avec le rayonnement (S) avant d'atteindre la surface à revêtir.
PCT/EP2010/006881 2009-11-11 2010-11-11 Dispositif d'application pour l'application et l'irradiation d'un agent de revêtement durcissable par rayonnement WO2011057786A1 (fr)

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EP10779713.6A EP2498919B1 (fr) 2009-11-11 2010-11-11 Dispositif d'application pour l'application et l'irradiation d'un agent de revêtement durcissable par rayonnement

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DE102009052656.0 2009-11-11
DE102009052656A DE102009052656A1 (de) 2009-11-11 2009-11-11 Applikationsvorrichtung zum Applizieren und Bestrahlen eines durch Strahlung härtbaren Beschichtungsmittels

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GB2491643A (en) * 2011-06-10 2012-12-12 Lambson Ltd Method of forming a polymeric material on a substrate
DE102012005261A1 (de) * 2012-03-15 2013-09-19 Eisenmann Ag Rotationszerstäuber und Verfahren zum Aufbringen eines Beschichtungsmaterials auf einen Gegenstand
CN104203425A (zh) * 2012-03-22 2014-12-10 巴斯夫欧洲公司 用于制备固化涂层的方法和设备
US9339832B2 (en) 2012-03-22 2016-05-17 Basf Se Spraygun for producing cured coating films and methods of use thereof

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JPH0665523A (ja) 1992-08-19 1994-03-08 Toyota Motor Corp ハイソリッド塗料及び塗装方法
DE9419641U1 (de) 1994-12-07 1995-02-02 Dürr GmbH, 70435 Stuttgart Rotationszerstäuber mit einem Glockenkörper
EP1002587A2 (fr) 1998-11-05 2000-05-24 Basf Aktiengesellschaft Procédé et appareil pour faire des revêtements réticulés
DE602004001336T2 (de) 2003-02-06 2007-02-01 Akzo Nobel Coatings International B.V. Spritzpistole und verfahren zum aufbringen einer durchaktinische strahlung härtbaren beschichtung
DE102007012897A1 (de) * 2007-03-17 2007-11-29 Daimlerchrysler Ag UV-Belichtungsraum

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JPH0665523A (ja) 1992-08-19 1994-03-08 Toyota Motor Corp ハイソリッド塗料及び塗装方法
DE9419641U1 (de) 1994-12-07 1995-02-02 Dürr GmbH, 70435 Stuttgart Rotationszerstäuber mit einem Glockenkörper
EP1002587A2 (fr) 1998-11-05 2000-05-24 Basf Aktiengesellschaft Procédé et appareil pour faire des revêtements réticulés
DE602004001336T2 (de) 2003-02-06 2007-02-01 Akzo Nobel Coatings International B.V. Spritzpistole und verfahren zum aufbringen einer durchaktinische strahlung härtbaren beschichtung
DE102007012897A1 (de) * 2007-03-17 2007-11-29 Daimlerchrysler Ag UV-Belichtungsraum

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Publication number Priority date Publication date Assignee Title
WO2016026009A3 (fr) * 2014-05-28 2016-06-09 Eisenmann Se Installation et système pour le traitement d'articles
CN106457276A (zh) * 2014-05-28 2017-02-22 艾森曼欧洲公司 用于处理物品的设备和系统

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DE102009052656A1 (de) 2011-05-12
EP2498919B1 (fr) 2016-07-06

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