EP4536484A1 - Procédé d'application de motifs sur une pièce à travailler - Google Patents

Procédé d'application de motifs sur une pièce à travailler

Info

Publication number
EP4536484A1
EP4536484A1 EP23732006.4A EP23732006A EP4536484A1 EP 4536484 A1 EP4536484 A1 EP 4536484A1 EP 23732006 A EP23732006 A EP 23732006A EP 4536484 A1 EP4536484 A1 EP 4536484A1
Authority
EP
European Patent Office
Prior art keywords
printing
workpiece
unit
coating material
printing material
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
EP23732006.4A
Other languages
German (de)
English (en)
Inventor
Philipp HENRY
Ludwig Albrecht
Peter Wulzinger
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.)
Homag GmbH
Original Assignee
Homag 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 Homag GmbH filed Critical Homag GmbH
Publication of EP4536484A1 publication Critical patent/EP4536484A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
    • 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.
    • 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
    • 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
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
    • B27D5/003—Other working of veneer or plywood specially adapted to veneer or plywood securing a veneer strip to a panel edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/02—Staining or dyeing wood; Bleaching wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0064—Digital printing on surfaces other than ordinary paper on plastics, horn, rubber, or other organic polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0076—Digital printing on surfaces other than ordinary paper on wooden surfaces, leather, linoleum, skin, or flowers
    • 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
    • B05D2201/00—Polymeric substrate or laminate
    • B05D2201/04—Laminate
    • 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
    • B05D2203/00—Other substrates
    • B05D2203/20—Wood or similar material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0486—Operating the coating or treatment in a controlled atmosphere
    • 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
    • B05D7/06—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 to wood
    • 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
    • B05D7/53—Base coat plus clear coat type
    • B05D7/532—Base coat plus clear coat type the two layers being cured or baked together, i.e. wet on wet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams

Definitions

  • the invention relates to a method for sampling a workpiece, which preferably consists at least in sections of wood, wood material or plastic, and to a device for carrying out the method.
  • workpieces which are usually made of wood, wood-based materials, plastic or various composite materials, are usually coated and patterned on their surface.
  • the pattern can either be present on the coating material in advance or can only be applied to the coating material after or in the course of the coating process.
  • EP 1 867 488 A discloses a device for patterning the surface of workpieces, in which a printing unit prints a coating material while it is fed to a workpiece to be coated.
  • the device includes a large number of conveyor and pressure rollers.
  • the workpieces are often decorated with natural patterns that imitate a wood or stone look. There is a desire for such sampled workpieces to have an appearance that is as realistic as possible.
  • EP 1 990 204 A discloses a method and a device for influencing the degree of gloss of the patterned surface.
  • methods and devices involve a comparatively high level of effort, for example through additional components or additional process steps.
  • a matt and therefore particularly natural appearance of the sampled workpiece can be achieved in a particularly simple and direct manner.
  • common printing processes that work according to the drop-on-demand printing principle have not yet enabled matt printing materials and therefore require complex additional measures that can be dispensed with thanks to the invention.
  • the result is a procedure for Sampling of a workpiece, which in itself enables a matt and therefore natural appearance of the sampled workpiece and reduces the process effort.
  • the degree of mattness of the printing material can be suitably selected by the person skilled in the art within the scope of the invention. However, a particularly natural appearance of the sampled workpiece results if, according to a further development of the invention, the printing material, at least in the hardened or dried state with a substantially uniform layer thickness, has a gloss level according to ISO 2813 of at most 70 GU, preferably at most 50 GU, particularly preferably at most 30 GU has.
  • a first workpiece is irradiated with a first wavelength spectrum and / or intensity and a subsequent second workpiece is irradiated with a second wavelength spectrum and / or intensity, so that the printed area of the first workpiece has a different level of gloss than the printed area of the second workpiece.
  • excimer radiation is at least partially used during curing, which preferably has a wavelength in the range of 150 - 190 nm.
  • the (matt) degree of gloss of the patterned surface can be additionally influenced in a targeted manner, which further increases the variability of the method according to the invention and allows the desired degree of gloss to be set particularly precisely.
  • the hardening of the printing material after printing takes place at least partially in an inert environment, in particular in a nitrogen environment.
  • curing can be carried out particularly quickly and homogeneously, especially when using excimer radiation. Thanks to the homogeneous curing, a particularly uniform appearance with a homogeneous matting results.
  • the surface of the printing material after printing and/or is provided with a topography during printing.
  • a topography By taking this measure, among other things, I... create particularly matt surfaces.
  • the surface can also have haptic properties.
  • the topography is carried out by irradiation and/or mechanical processing of the surface of the printing material.
  • a device for carrying out the method according to the invention is the subject of independent patent claim 11. By using this device, the advantages described above can be achieved particularly effectively.
  • the device has a joining device for attaching the coating material to the workpiece.
  • a joining device for attaching the coating material to the workpiece.
  • the device has a detection unit which is set up to detect at least the degree of gloss of the printed and preferably at least partially cured coating material. This makes it possible Reliably check the sampling result, for example with regard to the actual level of gloss achieved, so that appropriate measures can be taken on this basis if necessary.
  • Fig. 1 shows schematically a top view of a device for sampling a workpiece according to an embodiment of the invention.
  • FIG. 1 schematically illustrates a device 1 for sampling a workpiece 2 in a top view.
  • the device 1 comprises a conveyor unit 6, which conveys the workpiece 2 and possibly subsequent workpieces 2' along the print heads 10, 20 in a flow direction (from right to left in FIG. 1).
  • the conveyor device 6 can have, for example, conveyor troughs, conveyor chains and various other conveyor elements.
  • the conveyor device 6 can also serve to guide the printing units 10, 20 and possibly other units along a stationary workpiece 2.
  • the printing units 10, 20 and optionally further units can be arranged on a carrier which can be moved in the plane of the workpiece 2 and rotated about an axis running perpendicular to the plane of the workpiece.
  • Mixed forms of both concepts are also possible within the scope of the invention.
  • the printing units 10, 20 each have a print head 12, 22. These work according to the drop-on-demand printing principle, in which individual drops of printing material can be ejected as required.
  • piezo print heads, thermal print heads or other suitable print heads can be used.
  • the matt printing material in the cured or dried state with a substantially uniform layer thickness, has a gloss level according to ISO 2813 of at most 70 GU, although, depending on the application, significantly lower gloss levels of, for example, at most 50 GU up to values of below 30 GU can be useful.
  • the uniform layer thickness to determine the level of gloss inherent in the printing material can be achieved, for example, by applying the printing material to a substrate using a squeegee is applied, then fully or partially cured or dried and the gloss level is determined according to ISO 2813.
  • the uniform layer thickness can also be achieved by setting the printing process to be as uniform as possible and then carrying out a measurement according to ISO 2813 and determining the level of gloss.
  • the matt printing material is therefore a material that has a low gloss level of, for example, a maximum of 70 GU according to ISO 2813, even without additional measures - such as roughening, targeted topography or the like.
  • the printing material applied by the printing units 10, 20 can be hardened by simple irradiation with UV radiation.
  • the curing unit 30 can also be used with different wavelengths or Wavelength spectra and, if necessary, also operated with different intensities, so that the degree of gloss of the printed area of successive workpieces 2, 2 'can be specifically influenced by different operating parameters of the curing unit 30.
  • the curing unit 30 can also be set up to allow various other radiations to act on the printing material.
  • excimer radiation can also be used, which can have a wavelength of 172 nm, for example.
  • the excimer radiation can be used to harden a surface layer of the applied printing material and, in the subsequent step, to harden the entire printing material using UV light. This measure results in a different deformation behavior in the surface layer than in the underlying layers, which leads to a topography in the top layer and thus to a reduced level of gloss. In this way, the (matt) gloss level of the applied printing material can be further reduced and influenced in a targeted manner.
  • the joining device 40 can also have an adhesive application roller 46, by means of which an adhesive such as hot melt can be applied to the side of the coating material 4 facing the workpiece 2 '.
  • the energy source 44 can then either be passive or can be used to keep the applied adhesive activated or to further activate it.
  • the pressure roller then serves to press the coating material 4 supplied with an activated adhesive onto the workpiece 2 'and thus attach it.
  • the device 1 in the present embodiment also includes a detection unit 50 for detecting the degree of gloss of the printed and at least partially cured coating material 4.
  • the detection unit 50 can be, for example, a camera or a sensor that is suitable for determining parameters such as the level of gloss, the color spectrum, etc. of the printed coating material 4.
  • the detection unit 50 is connected to a control device 60, for example a machine control, which in turn is also connected to the conveyor unit 6, the printing units 10, 20 and the curing unit 30 can be connected.
  • the control device 60 is enabled to control the printing units 10 , 20 based on a detection result of the detection unit 50 .
  • This makes it possible not only to record the actual gloss levels or color spectra of the sampled coating material 4, but also to act on at least one of the printing units 10, 20 and/or the curing unit 20 in the event of target/actual deviations. If necessary, other machine parameters can also be corrected, such as the conveying speed of the conveying unit 6.
  • a workpiece 2 can therefore be conveyed into the device according to the invention by means of the conveyor unit 6 and provided with a coating material 4 in the area of the joining unit 40.
  • the workpiece 2 then reaches the printing units 10, 20 and is patterned there in the area of the coating material 4 with one or more printing materials, with at least the second (last) printing unit 20 outputting a matt and preferably transparent printing material.
  • the applied printing material is then cured or cured in the area of the curing unit 30. dried, whereupon, for example, the level of gloss of the applied printing material is recorded by means of the detection unit 50.
  • the detection result of the detection unit 50 is passed on to the control unit 60, which controls the further operation of the device 1 on this basis.
  • Curing unit works with different operating parameters in order to achieve different properties such as, in particular, gloss levels for different workpieces and, if necessary, within individual workpieces.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé d'application de motifs sur une pièce à travailler (2) de préférence constituée au moins en partie de bois, d'un matériau à base de bois, ou de plastique, comprenant les étapes suivantes : fournir une pièce à travailler (2) et un matériau de revêtement (4), appliquer le matériau de revêtement (4) sur la pièce à travailler (2), en particulier dans la région d'une surface étroite (2') de la pièce à travailler (2), et imprimer le matériau de revêtement (4) avec un matériau d'impression au moyen d'au moins une unité d'impression (10, 20) qui fonctionne selon le principe d'impression par goutte à la demande, le matériau d'impression ayant des propriétés mattes.
EP23732006.4A 2022-06-07 2023-06-06 Procédé d'application de motifs sur une pièce à travailler Pending EP4536484A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022114231.0A DE102022114231A1 (de) 2022-06-07 2022-06-07 Verfahren zum Bemustern eines Werkstücks
PCT/EP2023/065065 WO2023237522A1 (fr) 2022-06-07 2023-06-06 Procédé d'application de motifs sur une pièce à travailler

Publications (1)

Publication Number Publication Date
EP4536484A1 true EP4536484A1 (fr) 2025-04-16

Family

ID=86861752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23732006.4A Pending EP4536484A1 (fr) 2022-06-07 2023-06-06 Procédé d'application de motifs sur une pièce à travailler

Country Status (3)

Country Link
EP (1) EP4536484A1 (fr)
DE (1) DE102022114231A1 (fr)
WO (1) WO2023237522A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040071978A1 (en) 2002-10-15 2004-04-15 Omnova Solutions Inc. Laminate and method of production
ES2384575T3 (es) 2006-06-12 2012-07-09 Homag Holzbearbeitungssysteme Ag Procedimiento para decorar la superficie de piezas de trabajo
DE102006042063B4 (de) * 2006-09-05 2022-04-07 Wilhelm Taubert GmbH Verfahren zur Einstellung des Glanzgrades und der Haptik von dekorativen und funktionellen Oberflächen
PL1990204T3 (pl) 2007-05-10 2016-04-29 Homag Holzbearbeitungssysteme Ag Sposób i urządzenie do powlekania powierzchni
US7934785B2 (en) * 2008-03-18 2011-05-03 Xerox Corporation Selectable gloss coating system
EP3378665B1 (fr) * 2017-03-20 2020-09-23 Canon Production Printing Holding B.V. Procédé d'application d'une image ayant un brillant prédéterminé utilisant une encre durcissable par rayonnement
PL3835079T3 (pl) 2019-12-12 2024-01-29 Akzenta Paneele + Profile Gmbh Ustrukturowana poprzez druk cyfrowy folia odporna na zużycie z regulowanym połyskiem

Also Published As

Publication number Publication date
DE102022114231A1 (de) 2023-12-07
WO2023237522A1 (fr) 2023-12-14

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