EP2050514B1 - Method and device for manufacturing a structured surface of a varnished material plate - Google Patents

Method and device for manufacturing a structured surface of a varnished material plate Download PDF

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Publication number
EP2050514B1
EP2050514B1 EP08017694A EP08017694A EP2050514B1 EP 2050514 B1 EP2050514 B1 EP 2050514B1 EP 08017694 A EP08017694 A EP 08017694A EP 08017694 A EP08017694 A EP 08017694A EP 2050514 B1 EP2050514 B1 EP 2050514B1
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EP
European Patent Office
Prior art keywords
lacquer
natural
indentations
applicator roller
wood surface
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Application number
EP08017694A
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German (de)
French (fr)
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EP2050514A2 (en
EP2050514A3 (en
Inventor
Tobias Schreck
Sascha Lämmle
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Robert Buerkle GmbH
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Robert Buerkle GmbH
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Application filed by Robert Buerkle GmbH filed Critical Robert Buerkle GmbH
Priority to PL08017694T priority Critical patent/PL2050514T3/en
Publication of EP2050514A2 publication Critical patent/EP2050514A2/en
Publication of EP2050514A3 publication Critical patent/EP2050514A3/en
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    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0808—Details thereof, e.g. surface characteristics
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/086—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith
    • B05C1/0865—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith the cooperating element being a roller, e.g. a coating roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/02—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a matt or rough 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints
    • 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
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/02—Rollers ; Hand tools comprising coating rollers or coating endless belts
    • B05C17/0207—Rollers ; Hand tools comprising coating rollers or coating endless belts characterised by the cover, e.g. cover material or structure, special surface for producing patterns
    • 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
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers

Definitions

  • the invention relates to a method for producing a structured surface of a lacquered material plate according to the preamble of claim 1 and to an apparatus for producing such a structured surface according to the preamble of claim 12.
  • a uniform, non-structured topcoat layer is first applied to a material plate. Even before the final curing of this topcoat layer, a paint structure is applied to the topcoat layer in a continuous process by means of an applicator roll.
  • the corresponding device comprises a painting device for applying a uniform, non-structured topcoat layer to the material plate, an applicator roll for applying a lacquer structure to the topcoat layer, a metering device for metering lacquer on the applicator roll, and a transport device for transporting the material plate from the lacquering device to the applicator roll.
  • the visual appearance of wood-based panels to replace real wood panels, panels or planks usually produced by means of a multi-color printing, which is printed either directly on the corresponding receptive material plate surface or on a paper or film web
  • a Wooden surface simulates.
  • one or more transparent topcoat layers are then usually applied and cured.
  • the problem here is that the replica of the natural product surface, even if it looks optically deceptively true, immediately recognizable as a replica when the surface is viewed or touched in the back light.
  • the difference between this and the natural product is evident because of the optical reflections that emerge in the backlight or because of the very smooth surface of the paint.
  • An improvement of these optical and in particular haptic properties of material plates of the present type and a better approximation to the natural material surfaces to be simulated can therefore only be achieved if the topcoat layer is patterned, ideally congruent with the printed optical structure.
  • the first procedure uses an embossing roller, on the entire surface of which is applied paint and accordingly applies corresponding to the elevations and depressions of the roll surface over the material plate surface across varying amounts of paint, so that there is a surface structure.
  • the alternative second approach exploits the inability of the human eye and the human sense of touch to distinguish pits from pits with small structures on the order of 100 microns, which are structurally visible and palpable. Accordingly, it is proposed, in particular wood surface structures in such a way that the existing in the natural wood surface pores, so wells are formed in the finished paint structure as elevations.
  • the lacquer structure which is applied to the topcoat layer thus inversely reflects the natural wood surface structure.
  • the present invention is therefore based on the object to improve a method and an apparatus of the type mentioned in that in particular the feel of a correspondingly structured surface is improved, that is, the structure of the surface is clearly noticeable.
  • the present invention improves a method for producing a structured surface of a lacquered material plate, in which a uniform, non-structured topcoat layer is applied to the material plate and a lacquer structure is applied to the topcoat layer by means of an applicator roll prior to curing of the topcoat lacquer layer a rubberized applicator roll is used for applying the lacquer structure, the rubber coating of which is provided with depressions corresponding to the structure to be applied for transferring lacquer from a metering device to the topcoat layer of the material plate.
  • the device according to the invention accordingly comprises a painting device for applying a uniform, non-structured topcoat layer to the material plate, an applicator roll for applying a lacquer structure to the topcoat layer, a metering device for metering lacquer onto the applicator roll and a transport device for transporting the material plate from the coating device to the applicator roll wherein the applicator roll has a rubberized surface with, corresponding to the applied lacquer structure, wells for transferring paint from the metering device to the topcoat layer of the material plate.
  • the present invention employs a direct gravure printing process.
  • a direct gravure printing process This is not, as is common in direct gravure, a rigid, usually made of steel pressure cylinder used, but a rubberized applicator roll, in the gumming of the wells for transferring the paint are placed on the surface of the material.
  • it has hitherto been avoided as far as possible to carry out a direct gravure printing process for example by means of a rubberized roller, since the soft rubber coating produces a sharp printed image impossible.
  • the present invention is based on the finding that a sharp printed image is not at all necessary in the production of structured lacquer surfaces of the present type.
  • the certain blurring that inevitably results from the softness of the rubber coating on the applicator roll leads to a particularly natural one; because of the irregular appearance of the surface of a natural product imitating surface of the painted material plate.
  • For this blurred image contributes not only that the edges of the recesses in the rubber give off when rolling on the material plate surface and occupy a defined position, but also that the recesses in the rubber coating the paint is not completely on the uncured topcoat layer Release material plate surface.
  • recesses in the rubberized applicator roll which preferably have a depth of about 200 to about 250 microns, ultimately lead to coating structures of a haptic perceptible height of about 100 to 120 microns.
  • the rubberized applicator roll can be configured as a steel cylinder with a rubber coating, wherein the recesses in the rubber jacket can be introduced by means of a laser or by other known techniques.
  • the present invention is preferably used to simulate a structure of a natural or quasi-natural wood surface, whereby a quasi-natural wood surface is to be understood as meaning a surface which is modeled on a natural surface but does not have a natural model in the narrower sense - for example using numerical methods and algorithms.
  • a quasi-natural wood surface is to be understood as meaning a surface which is modeled on a natural surface but does not have a natural model in the narrower sense - for example using numerical methods and algorithms.
  • this does not exclude that imitations of other natural material surfaces, such as stone or leather, can be improved within the scope of the invention.
  • the structure of the natural or quasi-natural wood surface is inversely modeled such that the elevations on the topcoat layer formed by the paint structure correspond to the depressions of the natural or quasi-natural wood surface.
  • the structure of the natural or quasi-natural wood surface is not replicated inverse, so that the raised areas formed by the paint structure on the topcoat also correspond to the elevations of the natural or quasi-natural wood surface.
  • a blurred resist structure is applied in relation to the optical contrasts of the structure of the natural or quasi-natural wood surface, in particular by the fact that the recesses in the rubberized surface of the applicator roll are formed wider than the recesses of the natural or quasi-natural wood surface, results an additional blur in the printed image, which is advantageously suitable to enhance the visual and haptic impression of a natural surface.
  • a doctor blade or a metering roll rolling on the applicator roll can be used as a metering device to coat the lacquer in the depressions of the applicator roll. Since the applicator roll according to the invention is provided with a rubberized surface, it is sometimes difficult to clean the paint into the recesses of the applicator roll. However, due to the above-described effects of an improved appearance of naturalness due to a certain blurring of the pressure, it is not detrimental if the application of the lacquer in the depressions can not be done with the greatest possible cleanliness. A particularly simple dosing of the paint for the paint structure so the present invention also allows.
  • a curing device for example, with UV lamps or the like, in which the topcoat layer is only cured to such an extent that it receives a gel-like texture.
  • the lacquer structure is then applied to the thus-lacquered topcoat.
  • this ensures that the lacquer structure adheres to and bonds to the topcoat layer and, on the other hand, prevents the applied lacquer structure, especially if it is the same lacquer as is used for the topcoat lacquer layer, on the not yet cured topcoat layer dissolves and rises in this.
  • a mechanically particularly abrasion-resistant surface of the material board painted according to the invention is required, for example in floorboards, it may be provided in the context of the invention to cure the topcoat layer and the resist structure applied thereto and then to coat it with an additional resistant protective layer.
  • a pressure gap for the material plates are formed on the applicator roll by assigning the applicator roll a counter-pressure device, for example a roller or a table.
  • the metering roller 4 forms with the applicator roll 1 together a metering 7, in which the paint is kept, and from which the applicator roll 1 so far paint takes to a material plate 8, as in the rubber sheath 3 recesses 9 are introduced. Since the entirety of the depressions 9 form a structure, a paint structure 10 is transferred from the dosing gap 7 onto the surface of the material plate 8 in total by the depressions 9.
  • This paint structure 10 is applied to a topcoat layer 11, which has been previously applied by the painting device 5 shown schematically as a blanket cylinder and gelated by means of the curing device 6.
  • An impression cylinder 12, which is opposite to the applicator roll 1, ensures the continuous transport of the material plate 8 through the printing gap formed thereby.
  • FIGS. 2 to 4 are the same elements with identical reference numerals as in FIG. 1 provided, so that reference is made essentially to the description there.
  • FIG. 2 illustrates that in the rubber coating 3 of the applicator roll 1 irregular recesses 9 are introduced to apply the paint structure 10 on the material plate 8.
  • irregular recesses 9 are introduced to apply the paint structure 10 on the material plate 8.
  • FIG. 3 shows a detail FIG. 1 namely, the applicator roll 1 with its steel core 2 and its rubber coating 3, as it rolls on the material plate 8.
  • the recesses 9 in the surface of the rubber sheath 3 are not regularly formed, but designed varying both in their width and in their depth. This results in a particularly natural feel through the irregular lacquer structure 10 formed thereby. Since the rubber sheath 3 unrolls softly and elastically on the surface of the material plate 8, the depressions 9 deform during the dispensing of the lacquer to form the lacquer structure 10, so that this also results in a additional blurring and irregularity of the paint structure 10 results, which further improves the natural feel.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen einer strukturierten Oberfläche einer lackierten Werkstoffplatte nach dem Oberbegriff des Anspruchs 1 sowie eine Vorrichtung zum Herstellen einer solchen strukturierten Oberfläche nach dem Oberbegriff des Anspruchs 12.The invention relates to a method for producing a structured surface of a lacquered material plate according to the preamble of claim 1 and to an apparatus for producing such a structured surface according to the preamble of claim 12.

Bei einem Verfahren der vorliegenden Art wird auf eine Werkstoffplatte zunächst eine gleichförmige, nicht strukturierte Decklackschicht aufgetragen. Noch vor dem endgültigen Aushärten dieser Decklackschicht wird im Durchlaufverfahren mittels einer Auftragswalze eine Lackstruktur auf die Decklackschicht aufgebracht.In a method of the present type, a uniform, non-structured topcoat layer is first applied to a material plate. Even before the final curing of this topcoat layer, a paint structure is applied to the topcoat layer in a continuous process by means of an applicator roll.

Die entsprechende Vorrichtung umfasst eine Lackiereinrichtung zum Auftragen einer gleichförmigen, nicht strukturierten Decklackschicht auf die Werkstoffplatte, eine Auftragswalze zum Aufbringen einer Lackstruktur auf die Decklackschicht, eine Dosiereinrichtung zum Dosieren von Lack auf die Auftragswalze sowie eine Transporteinrichtung zum Transportieren der Werkstoffplatte von der Lackiereinrichtung zur Auftragswalze.The corresponding device comprises a painting device for applying a uniform, non-structured topcoat layer to the material plate, an applicator roll for applying a lacquer structure to the topcoat layer, a metering device for metering lacquer on the applicator roll, and a transport device for transporting the material plate from the lacquering device to the applicator roll.

Überall dort, wo Naturmaterialien mit strukturierten Oberflächen, wie insbesondere Holz oder Stein, durch leichter verarbeitbare und mit geringem Aufwand in gleichbleibender Qualität herstellbare Werkstoffplatten, wie insbesondere Faserplatten oder Laminate, ersetzt werden, ist man bestrebt, die sicht- und fühlbaren Oberflächen dieser Ersatzprodukte so zu strukturieren, dass sie das Aussehen und möglichst auch die Haptik der ersetzten Naturprodukte erhalten.Wherever natural materials with structured surfaces, such as in particular wood or stone, are replaced by material plates that can be processed more easily and with consistent production quality, such as, in particular, fibreboards or laminates, the aim is to improve the visible and tactile surfaces of these replacement products To structure that they get the look and, if possible, the feel of the replaced natural products.

Beispielsweise wird das optische Erscheinungsbild von Holzwerkstoffplatten, die Echtholz-Platten, Paneele oder Dielen ersetzen sollen, üblicherweise mittels eines Mehrfarbdrucks hergestellt, der entweder direkt auf die entsprechend aufnahmefähige Werkstoffplatten-Oberfläche oder auf eine auf diese Oberfläche aufzulaminierende Papier- oder Folienbahn aufgedruckt wird und eine Holzoberfläche nachbildet. Um den Druck abriebfest zu machen, werden dann üblicherweise noch eine oder mehrere transparente Decklackschichten aufgetragen und ausgehärtet.For example, the visual appearance of wood-based panels to replace real wood panels, panels or planks, usually produced by means of a multi-color printing, which is printed either directly on the corresponding receptive material plate surface or on a paper or film web aufzulaminierende on this surface and a Wooden surface simulates. In order to make the print abrasion resistant, one or more transparent topcoat layers are then usually applied and cured.

Das Problem hierbei besteht darin, dass die Nachbildung der Naturprodukt-Oberfläche auch dann, wenn sie optisch täuschend echt ausfällt, unmittelbar als Nachbildung zu erkennen ist, wenn die Oberfläche im Gegenlicht betrachtet oder angefasst wird. Denn durch die im Gegenlicht entstehenden optischen Reflexe bzw. durch die sich sehr glatt anfühlende Lackoberfläche wird der Unterschied zum Naturprodukt evident. Eine Verbesserung dieser optischen und insbesondere haptischen Eigenschaften von Werkstoffplatten der vorliegenden Art und eine bessere Angleichung an die nachzubildenden Naturwerkstoff-Oberflächen kann demnach nur erzielt werden, wenn die Decklackschicht strukturiert wird, idealerweise deckungsgleich mit der aufgedruckten optischen Struktur. Funktioniert dies beispielsweise bei Holzwerkstoffplatten, auf die eine bedruckte Folie aufkaschiert wird, noch recht gut mittels herkömmlicher Prägewalzen, die in die relativ dicke und weiche Kaschierfolie eine Struktur einprägen, ist ein solches Einprägen bei Werkstoffplatten mit einer Decklackschicht im Durchlaufverfahren bislang nicht möglich.The problem here is that the replica of the natural product surface, even if it looks optically deceptively true, immediately recognizable as a replica when the surface is viewed or touched in the back light. The difference between this and the natural product is evident because of the optical reflections that emerge in the backlight or because of the very smooth surface of the paint. An improvement of these optical and in particular haptic properties of material plates of the present type and a better approximation to the natural material surfaces to be simulated can therefore only be achieved if the topcoat layer is patterned, ideally congruent with the printed optical structure. If this works, for example, in the case of wood-based panels to which a printed film is laminated, still quite well by means of conventional embossing rollers, which impress a structure in the relatively thick and soft laminating foil, then such embossing is not possible in the case of material panels with a topcoat in a continuous process.

In der EP 1 645 339 A1 ist zur Lösung dieser Problematik vorgeschlagen worden, eine Werkstoffplatte, die mit einem Dekor bedruckt und anschließend mit einer transparenten Decklackschicht versehen wird, dadurch mit einer strukturierten Oberfläche zu versehen, dass noch vor dem Aushärten der Decklackschicht eine Lackstruktur aus vorzugsweise demselben Lack auf die Decklackschicht aufgebracht wird. Da die glatte Decklackschicht noch nicht ausgehärtet ist, verbindet sich die im zweiten Arbeitsschritt aufgebrachte Lackstruktur mit der Decklackschicht zu einer mehr oder weniger einheitlichen Schicht.In the EP 1 645 339 A1 has been proposed to solve this problem, a material plate, which is printed with a decor and then provided with a transparent topcoat, thereby providing a structured surface that even before curing of the topcoat layer applied a paint structure of preferably the same paint on the topcoat becomes. Since the smooth topcoat layer has not yet cured, the coating structure applied in the second step combines with the topcoat layer to form a more or less uniform layer.

In dieser Schrift zum Stand der Technik werden zwei grundsätzlich verschiedene Arten des Aufbringens einer Lackstruktur vorgeschlagen. Die erste Verfahrensweise verwendet eine Prägewalze, auf die ganzflächig Lack aufgebracht wird und die dementsprechend entsprechend den Erhöhungen und Vertiefungen der Walzenoberfläche über die Werkstoffplatten-Oberfläche hinweg variierende Mengen an Lack aufbringt, so dass sich eine Oberflächenstruktur ergibt. Die hierzu alternative zweite Vorgehensweise nutzt das Unvermögen des menschlichen Auges und des menschlichen Tastsinns aus, bei kleinen Strukturen in der Größenordnung von 100 µm, die als Struktur sicht- und fühlbar sind, Erhöhungen von Vertiefungen zu unterscheiden. Dementsprechend wird vorgeschlagen, insbesondere Holzoberflächen-Strukturen so auszugestalten, dass die in der Naturholz-Oberfläche vorhandenen Poren, also Vertiefungen, in der fertigen Lackstruktur als Erhöhungen ausgebildet werden. Die Lackstruktur, die auf die Decklackschicht aufgebracht wird, bildet die Naturholz-Oberflächenstruktur also invers ab.In this prior art document two fundamentally different ways of applying a lacquer structure are proposed. The first procedure uses an embossing roller, on the entire surface of which is applied paint and accordingly applies corresponding to the elevations and depressions of the roll surface over the material plate surface across varying amounts of paint, so that there is a surface structure. The alternative second approach exploits the inability of the human eye and the human sense of touch to distinguish pits from pits with small structures on the order of 100 microns, which are structurally visible and palpable. Accordingly, it is proposed, in particular wood surface structures in such a way that the existing in the natural wood surface pores, so wells are formed in the finished paint structure as elevations. The lacquer structure which is applied to the topcoat layer thus inversely reflects the natural wood surface structure.

Solche recht dünnen, die Poren einer Naturholz-Oberfläche invers nachbildenden Lackstrukturen können allerdings nicht mit einer Prägewalze aufgebracht werden. Hierzu wird vielmehr vorgeschlagen, die Lackstruktur im indirekten Tiefdruck-Verfahren aufzubringen, also mit einem entsprechend gravierten Stahlzylinder das gewollte Druckbild auf eine Gummituch-Auftragswalze zu übertragen, die dann die Lackstruktur auf die Werkstoffplatten-Oberfläche abträgt. Allerdings können hierbei nur Lackstrukturen mit Erhöhungen von um die 5 µm erzeugt werden, da die Auftragswalze die Lackstruktur beim Abrollen auf der Werkstoffplatte flachdrückt. Solch geringe Erhöhungen können zwar mit dem Auge wahrgenommen werden, was den optischen Oberflächeneindruck einer strukturierten Oberfläche ergibt, jedoch kann der menschliche Tastsinn solch geringe Erhöhungen nicht erspüren, so dass haptisch der Eindruck einer glatten und damit nicht natürlichen Oberfläche bestehen bleibt.However, such quite thin paint structures that inversely replicate the pores of a natural wood surface can not be applied with an embossing roll. For this purpose, it is rather proposed to apply the paint structure in the indirect gravure printing process, ie to transfer the desired printed image onto a blanket applicator roll with a correspondingly engraved steel cylinder, which then removes the lacquer structure onto the material plate surface. However, in this case only lacquer structures with elevations of around 5 μm can be produced, since the applicator roll flattens the lacquer structure when rolling on the material plate. Although such small elevations can be perceived by the eye, resulting in the optical surface impression of a structured surface, the human sense of touch can not feel such small elevations, leaving the impression of a smooth and thus not natural surface haptically.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs genannten Art dahingehend zu verbessern, dass insbesondere die Haptik einer entsprechend strukturierten Oberfläche verbessert wird, d.h. die Struktur der Oberfläche deutlich spürbar ist.The present invention is therefore based on the object to improve a method and an apparatus of the type mentioned in that in particular the feel of a correspondingly structured surface is improved, that is, the structure of the surface is clearly noticeable.

Gelöst ist diese Aufgabe durch ein Verfahren mit den Merkmalen des Anspruchs 1 sowie durch eine Vorrichtung mit den Merkmalen des Anspruchs 12.This object is achieved by a method having the features of claim 1 and by an apparatus having the features of claim 12.

Vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens ergeben sich aus den Ansprüchen 2 bis 11, bevorzugte Ausgestaltungen der erfindungsgemäßen Vorrichtung sind in den Ansprüchen 13 bis 22 niedergelegt.Advantageous developments of the method according to the invention will become apparent from the claims 2 to 11, preferred embodiments of the device according to the invention are set forth in claims 13 to 22.

Die vorliegende Erfindung verbessert ein Verfahren zum Herstellen einer strukturierten Oberfläche einer lackierten Werkstoffplatte, bei dem eine gleichförmige, nicht strukturierte Decklackschicht auf die Werkstoffplatte aufgetragen und vor dem Aushärten der Decklackschicht im Durchlaufverfahren mittels einer Auftragswalze eine Lackstruktur auf die Decklackschicht aufgebracht wird, also dadurch, dass zum Aufbringen der Lackstruktur eine gummierte Auftragswalze verwendet wird, deren Gummierung mit, der aufzubringenden Struktur entsprechenden, Vertiefungen zum Übertragen von Lack aus einer Dosiereinrichtung auf die Decklackschicht der Werkstoffplatte versehen ist.The present invention improves a method for producing a structured surface of a lacquered material plate, in which a uniform, non-structured topcoat layer is applied to the material plate and a lacquer structure is applied to the topcoat layer by means of an applicator roll prior to curing of the topcoat lacquer layer a rubberized applicator roll is used for applying the lacquer structure, the rubber coating of which is provided with depressions corresponding to the structure to be applied for transferring lacquer from a metering device to the topcoat layer of the material plate.

Die erfindungsgemäße Vorrichtung umfasst demnach eine Lackiereinrichtung zum Auftragen einer gleichförmigen, nicht strukturierten Decklackschicht auf die Werkstoffplatte, eine Auftragswalze zum Aufbringen einer Lackstruktur auf die Decklackschicht, eine Dosiereinrichtung zum Dosieren von Lack auf die Auftragswalze sowie eine Transporteinrichtung zum Transport der Werkstoffplatte von der Lackiereinrichtung zur Auftragswalze, wobei die Auftragswalze eine gummierte Oberfläche mit, der aufzubringenden Lackstruktur entsprechenden, Vertiefungen zum Übertragen von Lack aus der Dosiereinrichtung auf die Decklackschicht der Werkstoffplatte aufweist.The device according to the invention accordingly comprises a painting device for applying a uniform, non-structured topcoat layer to the material plate, an applicator roll for applying a lacquer structure to the topcoat layer, a metering device for metering lacquer onto the applicator roll and a transport device for transporting the material plate from the coating device to the applicator roll wherein the applicator roll has a rubberized surface with, corresponding to the applied lacquer structure, wells for transferring paint from the metering device to the topcoat layer of the material plate.

Die vorliegende Erfindung wendet also ein direktes Tiefdruckverfahren an. Hierbei wird nicht, wie im direkten Tiefdruck üblich, ein starrer, meist aus Stahl bestehender Druckzylinder verwendet, sondern eine gummierte Auftragswalze, in deren Gummierung die Vertiefungen zur Übertragung des Lacks auf die Werkstoffoberfläche eingebracht sind. Im Stand der Technik hat man bislang tunlichst vermieden, ein direktes Tiefdruckverfahren etwa mittels einer gummierten Walze durchzuführen, da die weiche Gummierung ein scharfes Druckbild unmöglich macht. Harte zu bedruckende Werkstoffe, die sich wie vorliegend nicht einem Tiefdruck-Stahlzylinder anpassen können, sind bislang daher immer im indirekten Tiefdruckverfahren bedruckt worden.Thus, the present invention employs a direct gravure printing process. This is not, as is common in direct gravure, a rigid, usually made of steel pressure cylinder used, but a rubberized applicator roll, in the gumming of the wells for transferring the paint are placed on the surface of the material. In the prior art, it has hitherto been avoided as far as possible to carry out a direct gravure printing process, for example by means of a rubberized roller, since the soft rubber coating produces a sharp printed image impossible. Hard-to-print materials that can not adapt to a rotogravure steel cylinder, as has been the case in the past, have thus far always been printed by indirect gravure printing.

Der vorliegenden Erfindung liegt dementsprechend die Erkenntnis zugrunde, dass ein scharfes Druckbild bei der Herstellung von strukturierten Lackoberflächen der vorliegenden Art gar nicht notwendig ist. Im Gegenteil: die gewisse Unschärfe, die sich durch die Weichheit der Gummierung der Auftragswalze im Druck zwangsläufig ergibt, führt zu einem besonders natürlichen; da unregelmäßigen Erscheinungsbild der die Oberfläche eines Naturprodukts nachahmenden Oberfläche der lackierten Werkstoffplatte. Zu diesem unscharfen Druckbild trägt nicht nur bei, dass die Ränder der Vertiefungen in der Gummierung beim Abrollen auf der Werkstoffplatten-Oberfläche nachgeben und keine definierte Stellung einnehmen, sondern auch dass die Vertiefungen in der Gummierung den Lack nicht vollständig an die noch nicht ausgehärtete Decklackschicht der Werkstoffplatten-Oberfläche abgeben. So führen Vertiefungen in der gummierten Auftragswalze, die vorzugsweise eine Tiefe von etwa 200 bis etwa 250 µm aufweisen, zu letztendlich aufgetragenen Lackstrukturen einer haptisch wahrnehmbaren Höhe von etwa 100 bis 120 µm.Accordingly, the present invention is based on the finding that a sharp printed image is not at all necessary in the production of structured lacquer surfaces of the present type. On the contrary: the certain blurring that inevitably results from the softness of the rubber coating on the applicator roll leads to a particularly natural one; because of the irregular appearance of the surface of a natural product imitating surface of the painted material plate. For this blurred image contributes not only that the edges of the recesses in the rubber give off when rolling on the material plate surface and occupy a defined position, but also that the recesses in the rubber coating the paint is not completely on the uncured topcoat layer Release material plate surface. Thus, recesses in the rubberized applicator roll, which preferably have a depth of about 200 to about 250 microns, ultimately lead to coating structures of a haptic perceptible height of about 100 to 120 microns.

Die gummierte Auftragswalze kann als Stahlzylinder mit Gummiummantelung ausgestaltet sein, wobei die Vertiefungen in der Gummiummantelung mittels eines Lasers oder mit sonstigen bekannten Techniken eingebracht werden können.The rubberized applicator roll can be configured as a steel cylinder with a rubber coating, wherein the recesses in the rubber jacket can be introduced by means of a laser or by other known techniques.

Bevorzugt wird die vorliegende Erfindung zur Nachbildung einer Struktur einer natürlichen oder quasi-natürlichen Holzoberfläche eingesetzt, wobei unter einer quasi-natürlichen Holzoberfläche eine solche Oberfläche zu verstehen ist, die einer natürlichen Oberfläche nachempfunden ist, jedoch kein natürliches Vorbild im engeren Sinne hat - also beispielsweise mittels numerischer Methoden und Algorithmen hergestellt wurde. Dies schließt natürlich nicht aus, dass im Rahmen der Erfindung auch Nachbildungen anderer natürlicher Werkstoffoberflächen, wie beispielsweise Stein oder Leder, verbessert werden können.The present invention is preferably used to simulate a structure of a natural or quasi-natural wood surface, whereby a quasi-natural wood surface is to be understood as meaning a surface which is modeled on a natural surface but does not have a natural model in the narrower sense - for example using numerical methods and algorithms. Of course, this does not exclude that imitations of other natural material surfaces, such as stone or leather, can be improved within the scope of the invention.

Hierbei ist es bevorzugt, dass die Struktur der natürlichen oder quasi-natürlichen Holzoberfläche solcherart invers nachgebildet wird, dass die durch die Lackstruktur gebildeten Erhöhungen auf der Decklackschicht den Vertiefungen der natürlichen oder quasi-natürlichen Holzoberfläche entsprechen. Es liegt jedoch selbstverständlich auch im Rahmen der vorliegenden Erfindung, wenn die Struktur der natürlichen oder quasi-natürlichen Holzoberfläche nicht invers nachgebildet wird, so dass die durch die Lackstruktur gebildeten Erhöhungen auf der Decklackschicht auch den Erhöhungen der natürlichen oder quasi-natürlichen Holzoberfläche entsprechen.In this case, it is preferred that the structure of the natural or quasi-natural wood surface is inversely modeled such that the elevations on the topcoat layer formed by the paint structure correspond to the depressions of the natural or quasi-natural wood surface. However, it is of course also in the context of the present invention, if the structure of the natural or quasi-natural wood surface is not replicated inverse, so that the raised areas formed by the paint structure on the topcoat also correspond to the elevations of the natural or quasi-natural wood surface.

Je nach der Holzoberflächen-Struktur, die nachgebildet werden soll, kann es im Rahmen einer weiterhin bevorzugten Ausgestaltung der vorliegenden Erfindung vorteilhaft sein, nur einen Teil der Struktur invers nachzubilden, während ein anderer Teil der Struktur nicht-invers nachgebildet wird. Beispielsweise kann es sinnvoll sein, großflächige Strukturen, wie Asteinschlüsse, nicht-invers nachzubilden, während Poren in der Holzoberfläche invers nachgebildet werden.Depending on the wood surface structure that is to be simulated, in the context of a further preferred embodiment of the present invention, it may be advantageous to inversely model only a part of the structure, while another part of the structure is non-inversely modeled. For example, it may be useful to non-inversely model large-area structures such as Asteinschlies, while pores are imitated inversely in the wood surface.

Zweckmäßig ist es hierbei, wenn ein optisches Abbild der Holzoberfläche, der die Lackstruktur nachgebildet ist, vor dem Aufbringen der Decklackschicht auf die Werkstoffplatte aufgedruckt wird, entweder direkt oder auf eine Papierbahn oder Folie, die auf die Werkstoffplatte aufgebracht wird und insofern Teil der Werkstoffplatten-Oberfläche wird. Hier ist es dann zweckmäßig, jedoch wegen der kleinen, von der menschlichen Hand nicht unterscheidbaren Strukturen keinesfalls notwendig, wenn die Lackstruktur mit dem aufgedruckten optischen Abbild der Holzoberfläche in Deckung gebracht wird.It is expedient in this case if an optical image of the wood surface, which is modeled on the paint structure, is printed on the material plate before the application of the topcoat layer, either directly or on a paper web or film, which is applied to the material plate and insofar part of the material plate Surface becomes. Here it is expedient, however, because of the small, indistinguishable from the human hand structures by no means necessary when the paint structure is brought into line with the printed optical image of the wood surface.

Wenn eine im Verhältnis zu den optischen Kontrasten der Struktur der natürlichen oder quasi-natürlichen Holzoberfläche unscharfe Lackstruktur aufgebracht wird, insbesondere dadurch, dass die Vertiefungen in der gummierten Oberfläche der Auftragswalze breiter ausgebildet werden als die Vertiefungen der natürlichen oder quasi-natürlichen Holzoberfläche, ergibt sich eine zusätzliche Unschärfe im Druckbild, die vorteilhafterweise dazu geeignet ist, den optischen und haptischen Eindruck einer natürlichen Oberfläche zu verstärken.If a blurred resist structure is applied in relation to the optical contrasts of the structure of the natural or quasi-natural wood surface, in particular by the fact that the recesses in the rubberized surface of the applicator roll are formed wider than the recesses of the natural or quasi-natural wood surface, results an additional blur in the printed image, which is advantageously suitable to enhance the visual and haptic impression of a natural surface.

Um den Lack auf die Auftragswalze aufzubringen, kann als Dosiereinrichtung eine Rakel oder eine auf der Auftragswalze abrollende Dosierwalze zum Einstreichen des Lacks in die Vertiefungen der Auftragswalze verwendet werden. Da die Auftragswalze erfindungsgemäß mit einer gummierten Oberfläche versehen ist, ist es mitunter schwierig, den Lack sauber in die Vertiefungen der Auftragswalze einzustreichen. Aufgrund der oben beschriebenen Effekte eines verbesserten Anscheins an Natürlichkeit durch eine gewisse Unschärfe des Drucks, ist es jedoch nicht schädlich, wenn das Einstreichen des Lacks in die Vertiefungen nicht mit größtmöglicher Sauberkeit erfolgen kann. Ein besonders einfaches Dosieren des Lacks für die Lackstruktur ermöglicht die vorliegende Erfindung also außerdem.In order to apply the lacquer to the applicator roll, a doctor blade or a metering roll rolling on the applicator roll can be used as a metering device to coat the lacquer in the depressions of the applicator roll. Since the applicator roll according to the invention is provided with a rubberized surface, it is sometimes difficult to clean the paint into the recesses of the applicator roll. However, due to the above-described effects of an improved appearance of naturalness due to a certain blurring of the pressure, it is not detrimental if the application of the lacquer in the depressions can not be done with the greatest possible cleanliness. A particularly simple dosing of the paint for the paint structure so the present invention also allows.

Nach einer bevorzugten Verfahrensweise der vorliegenden Erfindung wird nach dem Auftragen der Decklackschicht eine Aushärtevorrichtung, beispielsweise mit UV-Strahlern oder dergleichen durchlaufen, in der die Decklackschicht lediglich so weit ausgehärtet wird, dass sie eine gelartige Beschaffenheit erhält. Auf die so angelierte Decklackschicht wird dann die Lackstruktur aufgebracht. Dies stellt auf der einen Seite sicher, dass die Lackstruktur auf der Decklackschicht haftet und sich mit dieser verbindet, und verhindert auf der anderen Seite, dass die aufgebrachte Lackstruktur - insbesondere wenn es sich um denselben Lack handelt, wie er für die Decklackschicht verwendet wird - auf der noch nicht ausgehärteten Decklackschicht zerfließt und in dieser aufgeht.According to a preferred method of the present invention, after the application of the topcoat layer, a curing device, for example, with UV lamps or the like, in which the topcoat layer is only cured to such an extent that it receives a gel-like texture. The lacquer structure is then applied to the thus-lacquered topcoat. On the one hand, this ensures that the lacquer structure adheres to and bonds to the topcoat layer and, on the other hand, prevents the applied lacquer structure, especially if it is the same lacquer as is used for the topcoat lacquer layer, on the not yet cured topcoat layer dissolves and rises in this.

Wenn eine mechanisch besonders abriebfeste Oberfläche der erfindungsgemäß lackierten Werkstoffplatte erforderlich ist, beispielsweise bei Fußbodendielen, kann es im Rahmen der Erfindung vorgesehen sein, die Decklackschicht und die darauf aufgebrachte Lackstruktur auszuhärten und anschließend mit einer zusätzlichen widerstandsfähigen Schutzschicht zu überziehen.If a mechanically particularly abrasion-resistant surface of the material board painted according to the invention is required, for example in floorboards, it may be provided in the context of the invention to cure the topcoat layer and the resist structure applied thereto and then to coat it with an additional resistant protective layer.

Bei der erfindungsgemäßen Vorrichtung kann, wie an sich bekannt, an der Auftragswalze ein Druckspalt für die Werkstoffplatten gebildet werden, indem der Auftragswalze eine Gegendruckeinrichtung, beispielsweise eine Walze oder ein Tisch zugeordnet wird.In the apparatus according to the invention, as is known per se, a pressure gap for the material plates are formed on the applicator roll by assigning the applicator roll a counter-pressure device, for example a roller or a table.

Zur Illustration des erfindungsgemäßen Verfahrens wird im Folgenden ein Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung anhand der beigefügten Zeichnungen näher beschrieben und erläutert. Es zeigen:

Figur 1
eine schematische Schnittdarstellung einer erfindungsgemäßen Vorrichtung;
Figur 2
eine Draufsicht auf die Vorrichtung aus Figur 1;
Figur 3
ein Detail aus Figur 1;
Figur 4
ein Ausschnitt aus einer Oberfläche einer Auftragswalze einer erfindungsgemäßen Vorrichtung.
To illustrate the method according to the invention, an embodiment of a device according to the invention will be described and explained in more detail below with reference to the accompanying drawings. Show it:
FIG. 1
a schematic sectional view of a device according to the invention;
FIG. 2
a plan view of the device FIG. 1 ;
FIG. 3
a detail from FIG. 1 ;
FIG. 4
a section of a surface of an applicator roll of a device according to the invention.

Die in Figur 1 schematisch dargestellte Vorrichtung umfasst eine Auftragswalze 1 mit einem Stahlkern 2 und einer Gummiummantelung 3, eine auf der Gummiummantelung 3 der Auftragswalze 1 abrollende Dosierwalze 4, eine hier nur schematisch dargestellte Lackiereinrichtung 5 zum Auftragen einer Decklackschicht und eine Aushärtevorrichtung 6, die im Wesentlichen aus einer UV-Lampe besteht. Die Dosierwalze 4 bildet mit der Auftragswalze 1 zusammen einen Dosierspalt 7, in dem der Lack vorgehalten wird, und aus dem die Auftragswalze 1 insoweit Lack zu einer Werkstoffplatte 8 mitnimmt, als in die Gummiummantelung 3 Vertiefungen 9 eingebracht sind. Da die Gesamtheit der Vertiefungen 9 eine Struktur bilden, wird insgesamt von den Vertiefungen 9 eine Lackstruktur 10 aus dem Dosierspalt 7 auf die Oberfläche der Werkstoffplatte 8 übertragen. Diese Lackstruktur 10 wird auf eine Decklackschicht 11 aufgebracht, die von der schematisch als Gummituchzylinder dargestellten Lackiereinrichtung 5 zuvor aufgebracht und mittels der Aushärtevorrichtung 6 angeliert worden ist. Ein Gegendruckzylinder 12, der der Auftragswalze 1 gegenüberliegt, sorgt für den kontinuierlichen Transport der Werkstoffplatte 8 durch den hierdurch gebildeten Druckspalt.In the FIG. 1 schematically illustrated apparatus comprises an applicator roll 1 with a steel core 2 and a rubber jacket 3, a rolling on the rubber jacket 3 of the applicator roll 1 metering roller 4, a painting device 5 shown here only schematically for applying a topcoat layer and a curing device 6, which consists essentially of a UV Lamp exists. The metering roller 4 forms with the applicator roll 1 together a metering 7, in which the paint is kept, and from which the applicator roll 1 so far paint takes to a material plate 8, as in the rubber sheath 3 recesses 9 are introduced. Since the entirety of the depressions 9 form a structure, a paint structure 10 is transferred from the dosing gap 7 onto the surface of the material plate 8 in total by the depressions 9. This paint structure 10 is applied to a topcoat layer 11, which has been previously applied by the painting device 5 shown schematically as a blanket cylinder and gelated by means of the curing device 6. An impression cylinder 12, which is opposite to the applicator roll 1, ensures the continuous transport of the material plate 8 through the printing gap formed thereby.

In den Figuren 2 bis 4 sind gleiche Elemente mit identischen Bezugszeichen wie in Figur 1 versehen, so dass im Wesentlichen auf die dortige Beschreibung Bezug genommen wird.In the FIGS. 2 to 4 are the same elements with identical reference numerals as in FIG. 1 provided, so that reference is made essentially to the description there.

In der Darstellung nach Figur 2 wird verdeutlicht, dass in die Gummierung 3 der Auftragswalze 1 unregelmäßige Vertiefungen 9 eingebracht sind, um die Lackstruktur 10 auf die Werkstoffplatte 8 aufzubringen. Hier wird auch deutlich, dass durch die Rotationsbewegungen der Auftragswalze 1 und der Dosierwalze 4 in den Dosierspalt 7 hinein ein Einstreichen des Lacks aus dem Dosierspalt 7 in die Vertiefungen 9 erzielt wird.In the illustration after FIG. 2 illustrates that in the rubber coating 3 of the applicator roll 1 irregular recesses 9 are introduced to apply the paint structure 10 on the material plate 8. Here, it is also clear that by the rotational movements of the applicator roller 1 and the metering roller 4 in the metering 7 in a coating of the paint from the metering 7 into the recesses 9 is achieved.

Figur 3 zeigt ein Detail aus Figur 1, nämlich die Auftragswalze 1 mit ihrem Stahlkern 2 und ihrer Gummierung 3, wie sie auf der Werkstoffplatte 8 abrollt. Wie in einer Detailvergrößerung in Figur 4 noch deutlicher dargestellt, sind die Vertiefungen 9 in der Oberfläche der Gummiummantelung 3 nicht etwa regelmäßig ausgebildet, sondern sowohl in ihrer Breite als auch in ihrer Tiefe variierend ausgestaltet. Dies ergibt eine besonders natürliche Haptik durch die hierdurch gebildete unregelmäßige Lackstruktur 10. Da die Gummiummantelung 3 weich und elastisch auf der Oberfläche der Werkstoffplatte 8 abrollt, verformen sich die Vertiefungen 9 beim Abgeben des Lacks zur Bildung der Lackstruktur 10, so dass sich auch hierdurch eine zusätzliche Unschärfe und Unregelmäßigkeit der Lackstruktur 10 ergibt, was die natürliche Haptik nochmals verbessert. FIG. 3 shows a detail FIG. 1 namely, the applicator roll 1 with its steel core 2 and its rubber coating 3, as it rolls on the material plate 8. As in a detail magnification in FIG. 4 even more clearly shown, the recesses 9 in the surface of the rubber sheath 3 are not regularly formed, but designed varying both in their width and in their depth. This results in a particularly natural feel through the irregular lacquer structure 10 formed thereby. Since the rubber sheath 3 unrolls softly and elastically on the surface of the material plate 8, the depressions 9 deform during the dispensing of the lacquer to form the lacquer structure 10, so that this also results in a additional blurring and irregularity of the paint structure 10 results, which further improves the natural feel.

Claims (22)

  1. Method of producing a structured surface on a lacquered panel made of workpiece material, wherein a uniform, non-structured top lacquer layer is applied to the panel and, prior to the final hardening of the top lacquer layer, a lacquer structure is applied to the top lacquer layer by means of an applicator roller in a continuous process,
    characterised in that
    for the application of the lacquer structure there is used a rubber-coated applicator roller the rubber coating of which is provided with indentations for transferring lacquer from a metering device to the top lacquer layer of the panel, which indentations correspond to the structure to be applied.
  2. Method according to claim 1,
    characterised in that
    a lacquer structure which simulates the structure of a natural or quasi-natural wood surface is applied to the top lacquer layer.
  3. Method according to claim 2,
    characterised in that
    the structure of the natural or quasi-natural wood surface is simulated inversely in such a way that the raised portions formed by the lacquer structure on the top lacquer layer correspond to the indentations of the natural or quasi-natural wood surface.
  4. Method according to claim 2,
    characterised in that
    the structure of the natural or quasi-natural wood surface is only partly simulated inversely in such a way that the raised portions formed by the lacquer structure on the top lacquer layer correspond to the indentations of the natural or quasi-natural wood surface and is otherwise simulated non-inversely.
  5. Method according to at least one of claims 2 to 4,
    characterised in that
    a lacquer structure that is blurred in comparison with the optical contrasts of the structure of the natural or quasi-natural wood surface is applied.
  6. Method according to at least one of claims 2 to 5,
    characterised in that
    an optical image of the wood surface which the lacquer structure simulates is printed onto the panel prior to application of the top lacquer layer.
  7. Method according to claim 6,
    characterised in that
    the lacquer structure is brought into register with the printed optical image of the wood surface.
  8. Method according to at least one of claims 1 to 7,
    characterised in that
    as metering device there is used a doctor blade or a metering roller that rolls on the applicator roller for introducing the lacquer into the indentations in the applicator roller.
  9. Method according to at least one of claims 1 to 8,
    characterised in that
    the top lacquer layer is pre-gelled prior to application of the lacquer structure.
  10. Method according to at least one of claims 1 to 9,
    characterised in that
    lacquer structures having a height of from about 100 to about 120 µm are applied to the top lacquer layer.
  11. Method according to at least one of claims 1 to 10,
    characterised in that
    the top lacquer layer and the lacquer structure applied thereto are hardened and then covered with a protective layer.
  12. Device for producing a structured surface on a lacquered panel made of workpiece material, comprising a lacquering device (5) for applying a uniform, non-structured top lacquer layer (11) to the panel (8), an applicator roller (1) for applying a lacquer structure (10) to the top lacquer layer (11), a metering device (4) for metering lacquer onto the applicator roller (1), as well as a transport device (12) for transporting the panel (8) from the lacquering device (5) to the applicator roller (1),
    characterised in that
    the applicator roller (1) has indentations (9) for transferring lacquer from the metering device (4, 7) to the top lacquer layer (11) of the panel (8), which indentations correspond to the lacquer structure (10) to be applied.
  13. Device according to claim 12,
    characterised in that
    the indentations in the rubber-coated surface (3) of the applicator roller (1) simulate a natural or quasi-natural wood surface.
  14. Device according to claim 13,
    characterised in that
    the indentations (9) in the rubber-coated surface (3) of the applicator roller (1) correspond to the indentations of the natural or quasi-natural wood surface in order to simulate inversely the structure of the wood surface in the lacquer structure to be applied.
  15. Device according to claim 13,
    characterised in that
    only some of the indentations (9) in the rubber-coated surface (3) of the applicator roller (1) correspond to the indentations of the natural or quasi-natural wood surface in order to simulate partly inversely and partly non-inversely the structure of the wood surface in the lacquer structure to be applied.
  16. Device according to at least one of claims 13 to 15,
    characterised in that
    the indentations (9) in the rubber-coated surface (3) of the applicator roller (1) are broader than the indentations of the natural or quasi-natural wood surface.
  17. Device according to at least one of claims 13 to 16,
    characterised in that
    the indentations (9) in the rubber-coated surface (3) of the applicator roller (1) simulate a wood surface the optical image of which has been printed onto the panel (8).
  18. Device according to at least one of claims 12 to 17,
    characterised in that
    at least some of the indentations (9) in the rubber-coated surface (3) of the applicator roller (1) have a depth of from about 200 to about 250 µm.
  19. Device according to at least one of claims 12 to 18,
    characterised in that
    the metering device comprises a doctor blade or a metering roller (4) that rolls on the applicator roller (1) for introducing the lacquer into the indentations (9) in the applicator roller (1).
  20. Device according to at least one of claims 12 to 19,
    characterised in that
    between the lacquering device (5) and the applicator roller (1) there is arranged a hardening device (6) for pre-gelling the top lacquer layer (11).
  21. Device according to at least one of claims 12 to 20,
    characterised in that
    the transport device (12) comprises a counter-pressure device (12) located opposite the applicator roller (1) for forming a printing nip for the panel (8).
  22. Device according to at least one of claims 12 to 21,
    characterised in that
    downstream of the applicator roller (1) there are arranged a device for hardening the top lacquer layer (11) and the lacquer structure (10) as well as a device for covering the panel (8) with a protective layer.
EP08017694A 2007-10-19 2008-10-09 Method and device for manufacturing a structured surface of a varnished material plate Active EP2050514B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08017694T PL2050514T3 (en) 2007-10-19 2008-10-09 Method and device for manufacturing a structured surface of a varnished material plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202007014736U DE202007014736U1 (en) 2007-10-19 2007-10-19 Device for producing a structured surface of a painted material plate

Publications (3)

Publication Number Publication Date
EP2050514A2 EP2050514A2 (en) 2009-04-22
EP2050514A3 EP2050514A3 (en) 2009-12-23
EP2050514B1 true EP2050514B1 (en) 2010-12-15

Family

ID=38831260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08017694A Active EP2050514B1 (en) 2007-10-19 2008-10-09 Method and device for manufacturing a structured surface of a varnished material plate

Country Status (4)

Country Link
EP (1) EP2050514B1 (en)
DE (2) DE202007014736U1 (en)
ES (1) ES2358160T3 (en)
PL (1) PL2050514T3 (en)

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DE202016008350U1 (en) 2016-10-25 2017-08-17 Olbrich Gmbh Roller applicator for applying a coating composition on a structured substrate

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ES2350546B1 (en) * 2009-05-14 2011-09-22 Jesus Francisco Barberan Latorre SYSTEM FOR APPLYING VARNISHED WITH RELIEF.
DE102011088230A1 (en) * 2011-12-12 2013-06-13 Homag Holzbearbeitungssysteme Gmbh Method for planar application of coating material on e.g. lightweight building board in furniture industry, involves pressing coating material in workpiece so that adhesive agent enables connection between workpiece and coating material
DE102012103491A1 (en) 2012-04-20 2013-10-24 Fritz Egger Gmbh & Co. Og Method and device for producing a structured lacquer surface
KR20150042201A (en) * 2012-08-09 2015-04-20 디에스엠 아이피 어셋츠 비.브이. Roll coating process and apparatus
US20170087586A1 (en) * 2015-09-30 2017-03-30 Toto Ltd. Method for forming a coating film and a functional member comprising the same
ES2802801T3 (en) 2017-06-13 2021-01-21 Hymmen Gmbh Maschinen & Anlagenbau Procedure and device for the production of a structured surface
PL3415317T5 (en) 2017-06-13 2023-11-27 Hymmen GmbH Maschinen- und Anlagenbau Method and device for producing a decorative surface
DE102019206431A1 (en) 2019-05-03 2020-11-05 Hymmen GmbH Maschinen- und Anlagenbau Method for producing a structure on a surface

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DE3205911C2 (en) * 1982-02-19 1985-12-05 Küsters, Eduard, 4150 Krefeld Device for evenly applying small amounts of liquid to a moving textile web
EP1304236A1 (en) * 2001-10-19 2003-04-23 MZE Engineering GmbH Process for producing a structured varnish layer
ITMO20010257A1 (en) * 2001-12-21 2003-06-21 Sergio Sighinolfi APPARATUS AND METHOD FOR DECORATING OBJECTS
EP1598185A1 (en) * 2004-05-21 2005-11-23 DeMaxz Deutschland GmbH Device and process to print on wood or plastic substrate
ES2545665T3 (en) * 2004-10-05 2015-09-14 Fritz Egger Gmbh & Co. Og Procedure to produce a structured surface and a plate with a structured surface
DE102006004144B4 (en) * 2006-01-27 2022-12-29 Hymmen GmbH Maschinen- und Anlagenbau Apparatus and method for coating panels

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE202016008350U1 (en) 2016-10-25 2017-08-17 Olbrich Gmbh Roller applicator for applying a coating composition on a structured substrate

Also Published As

Publication number Publication date
PL2050514T3 (en) 2011-05-31
DE502008002022D1 (en) 2011-01-27
ES2358160T3 (en) 2011-05-06
EP2050514A2 (en) 2009-04-22
DE202007014736U1 (en) 2007-12-20
EP2050514A3 (en) 2009-12-23

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