EP4306222A1 - Verfahren und vorrichtung zur automatisierten fluiddichten abdichtung eines lochs in einem karosserieelement eines fahrzeuges - Google Patents

Verfahren und vorrichtung zur automatisierten fluiddichten abdichtung eines lochs in einem karosserieelement eines fahrzeuges Download PDF

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Publication number
EP4306222A1
EP4306222A1 EP22185013.4A EP22185013A EP4306222A1 EP 4306222 A1 EP4306222 A1 EP 4306222A1 EP 22185013 A EP22185013 A EP 22185013A EP 4306222 A1 EP4306222 A1 EP 4306222A1
Authority
EP
European Patent Office
Prior art keywords
sealant
hole
robot
cured
radiation
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.)
Pending
Application number
EP22185013.4A
Other languages
English (en)
French (fr)
Inventor
Dr. Sascha Andronescu
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.)
Unitech Deutschland GmbH
Original Assignee
Unitech Deutschland 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 Unitech Deutschland GmbH filed Critical Unitech Deutschland GmbH
Priority to EP22185013.4A priority Critical patent/EP4306222A1/de
Publication of EP4306222A1 publication Critical patent/EP4306222A1/de
Pending 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
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
    • 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
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • 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
    • B05D3/06—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 radiation
    • B05D3/061—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 radiation using U.V.
    • 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
    • B05D3/06—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 radiation
    • B05D3/061—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 radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • 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
    • B05D3/12—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 mechanical means
    • 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
    • B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
    • 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
    • B05D2502/00—Acrylic polymers
    • 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
    • B05D2504/00—Epoxy polymers
    • 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
    • B05D3/02—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 baking
    • B05D3/0254—After-treatment
    • B05D3/0263—After-treatment with IR heaters

Definitions

  • the invention relates to a method for automated fluid tight sealing of a hole in a body element of a vehicle. Furthermore, the invention relates to a device for automated fluid tight sealing of a hole in a body element of a vehicle.
  • said body is usually first pretreated, in which the body is sprayed or dipped with various phosphate salt solutions. This forms a crystalline metal-phosphate layer.
  • the body is then primed, whereby a corrosion protection primer is applied to the, preferably phosphated, sheet metal, which leads to very good adhesion with the sheet metal and thus prevents or slows down corrosion. Coating by electrolytic deposition has proven to be particularly advantageous, as even cavities that are difficult to access can be reliably primed.
  • the body is then placed in a first oven for thermal curing of the anticorrosion paint, which is usually based on epoxy resins.
  • the coloring layer After pre-curing in the first oven, the coloring layer, the so-called base paint, is applied to the primed body.
  • a clear paint coat is then applied as the final layer and protects the entire paint layer structure against mechanical, chemical and environmental stresses. Finally, a complete thermal final curing of all paint layers takes place in a second oven, the so-called paint oven.
  • the invention relates to the solution of a specific technical problem that arises in the above outlined standard painting process of a metallic vehicle body during vehicle construction.
  • a preferred method is the electrophoretic deposition (EPD), which is a widely used industrial process in which colloidal particles are deposited on an electrode under the influence of an electric field. More specific embodiments of the electrophoretic deposition process are cathodic dip painting (CDP) and anodic dip painting (ADP). Cathodic dip painting, also called “cataphoresis” or “Kathodische Tauchlacktechnik” (KTL) in German, is an electrochemical process in which the workpiece is coated in an immersion bath comprising a suspension of said colloidal particles. It is well suited for painting complicated structures and large quantities. Cataphoresis is a standard process for ensuring corrosion protection on vehicle body elements.
  • Body elements coated by cathodic dip painting often have cavities whose inner walls must also be coated for the purpose of corrosion protection.
  • Body elements comprising cavities constitute a "complicated structure" for the purpose of this application.
  • the holes have so far been sealed in manual processes with adhesive tape or plugs after the painted body elements have left the first oven (CDP oven), but before the coloring layer is applied.
  • the technical problem to be solved by the invention is therefore to provide a method and a device by means of which the hole sealing process can be at least partially automated in an advantageous manner.
  • the hole is continuously covered with a self-supporting sealant film during application, which is continuously self-adhered to the edge area of the hole and can then be final cured.
  • a manual operation is no longer required.
  • the process according to the invention can be seamlessly integrated into a painting process of a vehicle body, in particular comprising electrophoretic deposition, preferably cathodic dip painting, whereby the higher-level process is made more effective by the automation achieved according to the invention.
  • the body element comprises a plurality of holes to be sealed.
  • the sealant it is possible to apply and pre-cure the sealant to at least two or more holes in parallel, provided that the robot-assisted applicator provides a plurality of outlets and/or the robot comprises a plurality of applicators.
  • a sealant is applied to the hole to be sealed.
  • the sealant is preferably applied in the form of a liquid or in the form of a pasty mass.
  • the composition of the sealant is selected so that it can be cured in two stages.
  • Pre-curing preferably takes place immediately before, during or immediately after application of the sealant. In practice, this means that pre-curing takes place in the applicator, preferably in the die, or immediately after the sealant has left the applicator.
  • the sealant is an adhesive composition comprising a first curable component and a second curable component.
  • applicator and “applying” are used in the sense of the invention with the meaning that the hole in its final state is completely covered with the sealant.
  • This preferably includes that the applicator in sum passes over the hole in its entire length and width including an edge area surrounding the hole.
  • the applicator continuously delivers sealant, which is also continuously pre-cured during delivery. The pre-curing of the sealant takes place immediately before, during or immediately after the sealant leaves or has left the applicator.
  • the applicator passes over the entire length and width of the hole once in one go at a constant speed. The section of both the hole and the edge area that is passed over is continuously coated with sealant.
  • the applicator passes over the hole according to a predefinable grid, in particular in the form of a plurality of webs.
  • the hole is not completely covered with sealant during the first traverse. Instead, the sealant is applied and pre-cured over a hole section, in particular a web-shaped hole section, and an edge region adjacent thereto. The applicator then passes over the hole again. In the process, another section of the hole and the adjacent edge area are coated with sealant.
  • the sealant is also applied in an overlap area between the two sections.
  • the sealant of the further section is applied to the adjacent edge area, but also to the first already pre-cured sealant section, in particular sealant web, in the corresponding overlap area.
  • one additional sealant section, in particular sealant web may be enough to cover the entire hole. In other cases, this process is repeated until the hole is completely covered by several sealant sections, in particular sealant webs.
  • sealants are used that have different components that form their own three-dimensional networks by means of separate reaction mechanisms and/or separate reaction triggers, which three-dimensional networks in turn form an interpenetrating network after complete curing.
  • curable is to be understood so that the first and second component of the sealant each form a polymer network when exposed to a component-specific trigger.
  • pre-curing is to be understood as the step in which the first component forms a first polymer network.
  • completely curing or “final curing” is to be understood as the step in which the second component forms a second polymer network, when the first polymer network has already been formed during pre-curing.
  • pre-curing takes place immediately before, during and/or immediately after the sealant leaves the robot-assisted applicator, in particular a die, preferably a flat die, comprised by the applicator.
  • a die preferably a flat die
  • the viscosity of the sealant for the application can be adjusted in this way.
  • the consistency with which the sealant leaves the applicator can be adjusted. This has advantages with regard to applying the sealant to different hole geometries and sizes.
  • the polymerization of the first component is initiated by means of electromagnetic radiation as a trigger specific to the first component, in particular UV radiation and/or IR radiation, preferably UV radiation.
  • the polymerization of the first component is based on a chain growth reaction, in particular a free-radical polymerization, as reaction mechanism.
  • the polymerization of the first component leads to a first three-dimensional polymer network during the pre-curing step.
  • the first component comprises acrylate and/or methacrylate monomer system.
  • the first component comprises a vinyl ether monomer system.
  • an initiator which has an absorption maximum in the wavelength range from 365 nm to 405 nm. It has been shown that this allows UV curing to be carried out with lower radiation intensity and duration.
  • the polymerization of the second component is initiated by the supply of heat as a trigger specific to the second component.
  • the polymerization of the second component is based on a step growth reaction, in particular a polyaddition reaction, as reaction mechanism.
  • the polymerization of the second component leads to a second three-dimensional polymer network.
  • the second component is based on an epoxy-amine monomer system, preferably forming an epoxy resin, when being cured. When the first and the second component are fully cured, the first polymer network and the second polymer network form a three-dimensional interpenetrating network.
  • the term "monomer system” includes pure monomers, oligomers, high viscosity pre-polymerized polymers and mixtures thereof.
  • the monomer system may also include additives such as hardeners and/or initiators.
  • the sealant includes additives with which certain properties of the sealant can be influenced advantageously.
  • the additives include cross-linking agents, tackifiers, mineral fillers, in particular chalk or tallow, impact modifiers, in particular core-shell particles, functionalized fillers, in particular salinized fillers, glass fibers, glass flakes, Kevlar fibers, carbon fibers or mixtures thereof.
  • the sealant is continuously applied to the hole and to an edge area of the body element bordering the hole by means of a robot-assisted applicator while the applicator passes over the hole and the bordering edge area of the body element, so that the sealant completely covers the hole and the bordering edge area.
  • the sealant forms a film, preferably a self-supporting film in the area of the hole.
  • the hole is already covered by the end of the pre-curing process, so that no more impurities can penetrate into the cavity behind it.
  • the sealant is already firmly bonded to the body element. The body element can therefore be subjected to further process steps without the risk of the sealant coming loose.
  • sealant is continuously applied to an edge area of the body element bordering the hole, so that as a result the sealant covers the bordering edge area.
  • edge area includes the edge itself and a surface section of the body element adjoining the edge.
  • the surface section is the section to which sealant is applied.
  • the size of the surface section is selected so that it is sufficient for fluid-tight and mechanically stable attachment of the sealant. This also includes an embodiment in which the sealant, after application, is in contact only with the edge itself, but not with the surface section.
  • the term includes only a single continuous edge if the hole is formed with a round contour in the body element or a plurality of interconnected edges if the hole is formed with an angular contour in the body element.
  • a circular hole would have an edge area with a single edge, a triangular hole, an edge area with three edges, a square hole, an edge area with four edges, etc.
  • Complex edge geometries that deviate from the aforementioned basic shapes are also conceivable.
  • the invention is also suitable for such geometries as long as the hole can be sealed with the sealant via a bordering edge area.
  • the process according to the invention is part of a higher-level painting process comprising a step of coating the body element with a corrosion protection paint, preferably based on electrophoretic deposition, in particular cathodic dip painting, prior to applying the sealant to the body element.
  • the body element is first electrophoretically coated in an immersion bath.
  • said body element may be pretreated, in which the metallic body element is sprayed or dipped with at least a phosphate salt solution. This forms a crystalline metal-phosphate layer, which improves the adhesion between the metallic base material of the body element and the corrosion protection paint layer.
  • the body element has a cavity and a hole through which the reactive suspension in the immersion bath can flow into the cavity in such a way that the inner walls of the cavity are coated.
  • the body element is then removed from the immersion bath, preferably automatically, and placed into a first oven, in which the corrosion protection paint is being thermally cured, in particular completely cured.
  • the corrosion protection paint is based on or consist of an epoxy resin.
  • the body element is then removed from the first oven, preferably automatically, and fed to the robot-assisted sealing process according to the invention. In this case, when applying the sealant to the edge area of the body element bordering the hole, the sealant is directly applied to the previously cured coating layer of corrosion protection paint covering the edge area of the body element.
  • the body element comprising the coating of the previously cured corrosion protection paint and the pre-cured sealant is first coated with a colored base paint.
  • a colored base paint also includes the achromatic colors "white” and “black”.
  • a clear paint coat may preferably be disposed directly onto the layer of the colored base paint, in order to provide further protection against physical, mechanical and chemical influences.
  • the body element is then brought into a second oven, i.e. the paint oven and is being subjected to heat, so that the sealant as well as the painting layers are completely cured.
  • the integration of the sealing method according to the invention into the painting method has several favorable synergetic effects.
  • First of all thanks to the automated hole sealing according to the invention, it is now possible for the first time to completely automate the entire painting process.
  • the invention also relates to a robot-assisted applicator for applying a sealant, preferably in the form of a liquid, a pasty mass or a film, over a hole in a body element of a vehicle, comprising an application unit and a radiation unit, wherein the application unit comprises a flat die for spreading the sealant over the width of the hole and the adjacent edge sections opposite to each other in the width direction and wherein the radiation unit comprises a UV and/or IR radiation source, the radiation unit being arranged relative to the flat die such that the radiation unit is directed with respect to the direction of radiation towards the die and/or towards an area immediately adjacent to the die outlet.
  • a sealant preferably in the form of a liquid, a pasty mass or a film
  • the robot-assisted applicator according to the invention basically permits two advantageous process designs.
  • the sealant can be applied in liquid form or as a pasty mass.
  • the radiation unit is directed with respect to the direction of radiation to an area immediately adjacent to the die outlet, so that the sealant continuously conveyed from the die outlet is applied in such a way that it is deposited in suspension above the hole and precured to form a film immediately after exiting the die outlet.
  • This embodiment has the advantage that the sealant can wet the edge area bordering the hole while it is still at least partially liquid before pre-curing is complete. It has been shown that with this embodiment, the bond between the sealant film and the edge area is stronger after pre-curing and complete curing of the sealant.
  • the robot-assisted applicator permits processing in which the sealant is already pre-cured inside the die.
  • the radiation unit is directed towards the die with respect to the direction of the emitted radiation.
  • the die may be advantageous for the die to have, on the radiation side, a wall section with a material that is permeable to the emitted radiation.
  • the pressing means can preferably be formed at the die outlet as a lip, profile or roll arranged transversely, in particular at right angles, to the conveying direction of the sealant.
  • the pressing means is formed as a transverse strip made of plastic or metal, as a rubber lip, a roll and/or as an element formed in the manner of a doctor blade.
  • This embodiment has the advantage that, on the one hand, overhead application of the already precured sealant film is possible. On the other hand, it is also advantageous that the film cannot collapse into the hole during application, even at low traversing speeds of the applicator.
  • the radiation unit is configured to change the radiation angle of the radiation to be emitted.
  • the radiation unit or a part of the radiation unit, in particular the radiation source can be configured to be pivotable.
  • the angle of the radiation is set. In this case, different applicators having radiation angles adapted to the specific processing can be provided.
  • the radiation source comprises a plurality of UV-LEDs.
  • LEDs provide the necessary intensity of UV-radiation at a comparably low energy consumption and a longer life span.
  • the plurality of UV-LEDs is provided in the form of a circular, semi-circular or linear LED bar.
  • the LED bar further comprises cooling means, in particular a cooling profile made of metal at the back of the bar.
  • the LED bar is pivotably supported by the radiation unit, so that the die itself and a region immediately adjacent to the die outlet can be targeted by the emitted radiation in order to promote applicating the sealant in different states, i.e. liquid, pasty or as a film.
  • the UV-LEDs are adapted to emit UV-radiation in the wavelength range from 365 nm to 405 nm, in order to provide the necessary trigger radiation for the preferred initiators of the first component of the sealant.
  • the radiation unit is attached to the application unit and arranged at a distance from the flat die.
  • the distance is set so that the emitted radiation has to cover a path of 2 cm to 10 cm in order to interact with the sealant.
  • the radiation unit is attached to the application unit and arranged at a distance from the flat die by means of an elongated spacer.
  • the elongated spacer may preferably be formed as a metal profile.
  • the robot-assisted applicator is preferably adapted to be mounted onto and be operated by a jointed-arm robot.
  • the invention further relates to a robot comprising a robot-assisted applicator according to the invention and two robot-arms, each of which is movably linked to the other at one end, wherein the applicator is movably attached to one of the arms at the other end of said arm.
  • the robot is a jointed-arm robot, in particular a six-axis jointed-arm robot.
  • the robot in particular the six-axis jointed-arm robot, provides means, in particular conduits, for conducting the sealant in liquid or paste form from a sealant tank to the applicator according to the invention.
  • the conduit system of the robot is fluidically connected to the sealant conduits of the applicator.
  • Figure 1 shows a robot-assisted applicator 1, comprising an application unit 2 and a radiation unit 3, on its way passing over a hole 7 to be sealed.
  • the application unit 2 has a flat die 4 for applying sealant 5.
  • the radiation unit 3 has a radiation source not shown in the form of a linear UV LED bar.
  • the radiation unit 3 is connected to the application unit 2 via an elongated spacer 6.
  • the radiation unit 3 is arranged at a distance from the flat die via the spacer 6.
  • the radiation unit 3 is arranged at a fixed angle to the flat die 4, so that the emitted radiation irradiates an area which directly adjoins the outlet of the flat die 4 in the conveying direction of the sealant 5.
  • the flat die 4 is used to continuously apply sealant 5 over the hole 7 formed in a body element of a vehicle as well as the edge area 8 laterally delimiting the hole 7.
  • the robot-assisted applicator 1, together with the application unit 2 and the radiation unit 3, travels over the entire hole 7 and the edge area 8 at a predefinable speed.
  • sealant 5 is continuously conveyed out of the outlet 9 of the flat die 4 as a liquid and immediately afterwards continuously pre-cured by means of UV radiation to a self-supporting film, adhesively attached to edge area 8.
  • a first component of the sealant is polymerized in a radical polymerization process initiated by UV radiation to form a first three-dimensional network.
  • the first component comprises an acrylate and/or methacrylate monomer system.
  • Figure 2 shows a robot-assisted applicator 1, comprising an application unit 2 and a radiation unit 3, on its way passing over a hole 7 to be sealed.
  • the application unit 2 has a flat die 4 for applying sealant 5.
  • the radiation unit 3 has a radiation source not shown in the form of a linear UV LED bar.
  • the radiation unit 3 is connected to the application unit 2 via an elongated spacer 6.
  • the radiation unit 3 is arranged at a distance from the flat die via the spacer 6.
  • the radiation unit 3 is arranged at a fixed angle to the flat die 4, so that the emitted radiation irradiates a region of the flat die 4 which is located upstream of the outlet 9 of the flat die 4 in the conveying direction of the sealant 5.
  • the sealant 5 is already pre-cured in the flat die 4 and leaves the outlet 9 of the flat die 4 in the form of a self-supporting film.
  • the flat die 4 has a window on the radiation unit side, which is not shown and is formed from a material that is permeable to UV radiation.
  • the outlet 9 of the flat die 4 has a rubber lip which is not shown.
  • the rubber lip is arranged at right angles to the direction of flow of the sealant 5 at the outlet 9. The rubber lip is used to press and bond the sealant 5 in the form of the self-supporting film to the edge area 8
  • the flat die 4 is used to continuously apply sealant 5 over the hole 7 formed in a body element of a vehicle as well as the edge area 8 laterally delimiting the hole 7.
  • the robot-assisted applicator 1, together with the application unit 2 and the radiation unit 3, travels over the entire hole 7 and the edge area 8 at a predefinable speed.
  • a first component of the sealant is polymerized in a radical polymerization process initiated by UV radiation to form a first three-dimensional network.
  • the first component comprises an acrylate and/or methacrylate monomer system.
  • the body element which comprises the hole 7 delimited by the edge area 8 is further treated in the same way after the sealant application and pre-curing have been completed.
  • the further treatment serves to completely cure the pre-cured sealant film 5, whereby the hole 7 is sealed fluid-tight and the mechanical properties of the sealant film are improved.
  • the body element is placed in an oven and heated to a predeterminable temperature for a predeterminable period of time.
  • the second component of the sealant 5 is then polymerized by heat to form a second three-dimensional network.
  • the polymerization reaction of the second component is based on a heat-initiated polyaddition mechanism.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP22185013.4A 2022-07-14 2022-07-14 Verfahren und vorrichtung zur automatisierten fluiddichten abdichtung eines lochs in einem karosserieelement eines fahrzeuges Pending EP4306222A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22185013.4A EP4306222A1 (de) 2022-07-14 2022-07-14 Verfahren und vorrichtung zur automatisierten fluiddichten abdichtung eines lochs in einem karosserieelement eines fahrzeuges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22185013.4A EP4306222A1 (de) 2022-07-14 2022-07-14 Verfahren und vorrichtung zur automatisierten fluiddichten abdichtung eines lochs in einem karosserieelement eines fahrzeuges

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EP4306222A1 true EP4306222A1 (de) 2024-01-17

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0820491A1 (de) * 1995-04-12 1998-01-28 Minnesota Mining And Manufacturing Company Schmelzflüssige materialien und verfahren zur flächenversiegelung
US20070036982A1 (en) * 2005-08-11 2007-02-15 3M Innovative Properties Company Interpenetrating polymer network as coating for metal substrate and method therefor
US20130092324A1 (en) * 2011-03-04 2013-04-18 Siegfried Dietz Joining Surface Treatment Device and Method
DE202014103202U1 (de) * 2014-07-11 2015-10-13 Kds Holding Gmbh Applikator zum Auftragen eines lichtaushärtenden Verbundmaterials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0820491A1 (de) * 1995-04-12 1998-01-28 Minnesota Mining And Manufacturing Company Schmelzflüssige materialien und verfahren zur flächenversiegelung
US20070036982A1 (en) * 2005-08-11 2007-02-15 3M Innovative Properties Company Interpenetrating polymer network as coating for metal substrate and method therefor
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