EP4093612A1 - Procédé d'impression sur une pièce et dispositif d'impression - Google Patents

Procédé d'impression sur une pièce et dispositif d'impression

Info

Publication number
EP4093612A1
EP4093612A1 EP21700768.1A EP21700768A EP4093612A1 EP 4093612 A1 EP4093612 A1 EP 4093612A1 EP 21700768 A EP21700768 A EP 21700768A EP 4093612 A1 EP4093612 A1 EP 4093612A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
printing
narrow
information
decor
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
EP21700768.1A
Other languages
German (de)
English (en)
Inventor
Ludwig Albrecht
Achim Homeier
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 EP4093612A1 publication Critical patent/EP4093612A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B41J11/0095—Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end
    • 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
    • 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
    • B41J11/007—Conveyor belts or like feeding devices
    • 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
    • B41J2203/00—Embodiments of or processes related to the control of the printing process
    • B41J2203/01—Inspecting a printed medium or a medium to be printed using a sensing device

Definitions

  • the invention relates to a method for printing a surface of a workpiece and a printing device for printing a surface of a workpiece.
  • workpieces made of a wood material are often used, for example chipboard or fibreboard.
  • a coating material for example in the form of a reproduced wood grain, a stone reproduction or the like, which can be reproduced on the narrow surfaces by a subsequent printing process with a printing device.
  • the decoration on the wide surface can be captured by image capture so that it can be printed on the narrow surface.
  • the invention is based on the object of proposing a method for printing a surface of a workpiece, by means of which a high-quality optical impression of the workpiece can be formed.
  • a method for printing at least one narrow surface of a workpiece is defined in claim 1.
  • a printing device for printing at least one narrow surface of a workpiece is defined in claim 9. Subclaims relate to specific embodiments.
  • the method for printing at least one narrow surface of a workpiece in particular a workpiece that is at least partially made of wood, a wood material, plastic, composite material or the like and is provided with a coating material at least in some areas, has the steps of providing surface information at least in some areas through a sensor device are optically detected by at least one workpiece surface adjoining the narrow surface to be printed, the detected surface information is transmitted to a print controller and the print controller determines print information for controlling a printing unit as a function of the detected surface information, the printing information controlling a printing process by that a narrow surface decoration is printed on the at least one narrow surface, which is adapted to a decor course of the optically detected workpiece surface.
  • a high-quality visual impression of the workpiece can be achieved through the coordinated decor course between the workpiece surface and the narrow surface.
  • a coating material can be, for example, a wood veneer, a surface paper, a coating varnish or the like.
  • the coating material provided on the wide surfaces of the workpiece can have a decoration, for example in the form of a reproduced wood grain, a stone replica, a graphic pattern or an image, with a narrow surface decoration adapted to it being able to be printed on the at least one narrow surface by the printing process.
  • the decors between adjacent workpiece surfaces can be coordinated with one another so that no visual impairment of the decor course occurs at the transition from one workpiece surface to an adjacent workpiece surface, for example a grain course on the broad surface matches the grain course on the narrow surface. If the surface information of the workpiece surface is only recorded in certain areas, only a small amount of data is created, so that rapid data processing by the print control is made possible in order to control the printing process. As a result, the process times can be shortened so that the workpieces can be printed in a continuous process.
  • An advantageous development of the method can provide that the print control determines a corresponding decor template from a decor data record based on the detected surface information and the print information for controlling the printing process is determined or derived from the decor template.
  • the decorative template serving as a print template can be identified from the data record on the basis of the recorded surface information.
  • a Narrow surface decor can be reproduced, the decor course of which is matched to the decor course of the workpiece surface.
  • a further advantageous embodiment of the method can provide that the optically recorded workpiece surface has a workpiece decoration which corresponds to a decoration section from the determined decoration template, the corresponding decoration section being determined in a positionally precise manner from the decoration template by means of the pressure control based on the recorded surface information and / or the workpiece dimensions the print information for printing the narrow-surface decoration can be determined from at least one decoration area of the decoration template.
  • the decor course of the narrow-surface decor can be adapted particularly precisely to the decor course of the workpiece decor.
  • the print information for printing the narrow surface decoration can be determined from a decorative area of the decorative template that adjoins the decorative section of the workpiece decoration in the decorative template, this decorative area being printed on the narrow surface in such a way that a coordinated decor course between the workpiece decor of the workpiece surface and the narrow surface decor of the narrow surface is formed.
  • a decorative strip is determined from the decorative template, which adjoins the decorative cutout of the workpiece surface.
  • the decorative strip has a width that corresponds to a thickness of the workpiece.
  • the print information is determined from this decorative strip and an image of the decorative strip is printed on the narrow surface of the workpiece in a precisely positioned manner.
  • An advantageous embodiment of the method can provide that the printing unit is positioned by a positioning device relative to the narrow surface, the printing unit being arranged in a defined position relative to the narrow surface as a function of the detected surface information and the printing process being controlled in accordance with the pattern of the workpiece decoration on the workpiece surface.
  • an exact positioning of the printing unit in relation to the workpiece can be determined, provided and monitored. This can take place in particular before the start of the printing process, so that the position of the printing unit can be precisely aligned and adjusted. In particular, if the printing unit and the workpiece are moved relative to one another during the printing process, the positioning of the printing unit can also be monitored.
  • a further preferred embodiment of the method can provide that a continuous or discontinuous conveying movement of the workpiece or a continuous or discontinuous movement of the printing unit is carried out while the surface information is being recorded and / or while the printing process is being carried out.
  • the workpieces can perform the conveying movement during the printing process.
  • An interruption of the conveying movement can also be provided to carry out the printing process.
  • the surface information of an edge region of the workpiece surface which adjoins the narrow surface to be printed can be recorded optically, and the print information for printing the narrow surface decoration can be determined or derived from the recorded surface information of the edge area.
  • the narrow surface decoration is printed on the narrow surface by the printing process in such a way that a coordinated decor course is formed between the workpiece surface and the narrow surface.
  • the edge region of the workpiece surface is detected by a movement of the sensor device and the printing information is determined or derived and the printing process is carried out essentially simultaneously on the at least one narrow surface.
  • An advantageous embodiment of the method can also provide that the recording of the surface information and the execution of the printing process for printing the narrow surface decoration are carried out in real time, preferably in immediate succession.
  • the surface information can be acquired and the printing process can be carried out essentially at the same time. In this way, very short process times for printing the at least one narrow surface of the workpiece can be achieved.
  • the printing device for printing at least one narrow surface of a workpiece comprises at least one printing unit for printing on the at least one narrow surface of the Workpiece, the printing unit and / or the workpiece being provided to be movable relative to one another for carrying out the printing process, a sensor device being provided through which at least one surface information is transmitted to the narrow surface to be printed at least in regions adjacent workpiece surface can be detected optically, as well as a pressure control, by means of which a method according to one of the embodiments described above can be carried out to control the at least one pressure unit.
  • At least one narrow surface of the workpiece can be printed with a narrow surface decor that is matched to a decor course of the adjoining workpiece surface.
  • the workpiece can be provided with a decoration that conveys a high-quality visual impression, for example in the form of a reproduced wood grain, a stone reproduction or another graphic pattern or image.
  • the surfaces of the workpiece are in particular provided with a coating material, for example a wood veneer, surface paper and / or coating lacquer or the like.
  • a conveying device for receiving several workpieces, through which the workpieces can be conveyed in a continuous or discontinuous conveying movement, the narrow surfaces being printable by the printing unit during the continuous or discontinuous conveying movement.
  • a conveying device can make it possible to print workpieces in a continuous process.
  • the workpieces can perform the conveying movement during the printing process or the conveying movement can be interrupted for the printing process.
  • the process times can be reduced considerably in this way, so that a large number of workpieces can be printed one after the other.
  • the acquisition of the surface information and the execution of the printing process can take place in real time, ie essentially at the same time, so that the process times can also be shortened.
  • FIG. 1 shows a schematic view of a printing device for printing a narrow surface of a workpiece
  • FIG. 2 shows a schematic view of a decorative template and a workpiece with a workpiece decoration
  • FIG. 3 shows a flow chart of a printing method for printing narrow surfaces of a workpiece
  • FIG. 1 shows a schematic view of a printing device 10 for printing a workpiece 11.
  • the printing device 10 comprises a printing unit 12 for carrying out a printing process and a sensor device 13, by means of which surface information 14 of the workpiece 11 can be detected optically.
  • the printing device 10 is designed in particular as a throughfeed device in which the workpieces 11 for the printing process are conveyed in a throughput direction relative to the printing unit 12.
  • the printing device 10 has a transport device 14 by which the workpieces 12 are conveyed to the printing unit 12 one after the other, i.e. in a continuous process.
  • the workpieces 12 can be conveyed with a continuous or with a discontinuous conveying movement F.
  • the printing unit 12 can be provided so that it can move in multiple axes in order to position it relative to the workpiece 12 to be printed.
  • the printing unit 12 can also be arranged in several side regions of the workpiece 11.
  • a plurality of printing units 12 can also be provided, each of which is assigned to a side area of the workpiece 11.
  • the printing unit 12 has a positioning device 15 by means of which a position of the printing unit 12 relative to the workpiece 11 can be determined and monitored.
  • the position can be determined, for example, by laser detection.
  • the printing device 10 can alternatively also be designed as a stationary printing device 10 in which the workpieces 11 are received in a stationary manner and the printing unit 12 is moved to the workpiece 11 in order to carry out the printing process.
  • the workpieces 11 to be printed are preferably workpieces 11 which are at least partially made of wood, wood-based materials, plastic, a composite material or the like.
  • the workpieces 11 are preferably designed in the form of a plate, for example as a solid wood panel, chipboard, fiberboard or the like. These can be provided for both furniture and component manufacturing.
  • a coating material is provided on the workpiece surfaces of the workpiece 11.
  • the coating material is provided both on the broad surfaces 16 and on the narrow surfaces 17 of the workpiece 11.
  • the coating material provided on the broad surfaces 16 has a workpiece decoration 19. According to FIGS. 1 and 2, this workpiece decoration 19 is designed, for example, as a simulated wood grain. In an alternative embodiment, the workpiece decoration 19 can also be a stone replica, a graphic pattern or an image.
  • the coating material on the wide surface 16 can either be provided with the workpiece decoration 19 before it is attached to the workpiece 11 or after it is attached to the workpiece 11.
  • the workpiece decoration 19 can be printed onto the coating material.
  • the workpiece decor 19 is a decor cutout 21 from a decor template 22.
  • FIG. 2 shows such a decor template 22 using the example of the wood grain as an example.
  • This decorative cutout 21 corresponds to the dimensions of the broad surface 16 and is provided on the broad surface 16 of the workpiece 11 in the form of a veneer or coating material in order to form the workpiece decoration 19.
  • a coating material is also provided on the narrow surfaces 17 of the workpiece 11, for example a surface paper or a coating lacquer, which, however, is printed with a narrow surface decoration 27 adapted to the workpiece decoration 19 by a printing process with the printing device 10.
  • the method for printing the narrow surface 17 is shown in the flow chart according to FIG. 3 and is explained below. The method is explained below with reference to the printing of a narrow surface 17. However, the method is also carried out in order to print the further narrow surfaces 17 of the workpiece 11 with the narrow surface decoration 27.
  • the workpiece 11 is first positioned in relation to the sensor device 13. This is done in particular by the conveying device 14, which conveys the workpiece 11 in the continuous or discontinuous conveying movement F to the printing device 10.
  • the sensor device 13 detects surface information 23 in a partial area of the wide area 16.
  • the surface information 23 can be detected in a very small partial area in relation to the wide area 16, so that the detected surface information 23 only forms a small amount of data.
  • This surface information 23 relates to the workpiece decoration 19 provided on the broad surface 16.
  • the surface information 23 is recorded optically by an image sensor and / or a camera, in particular a multispectral camera.
  • the surface information 23 can be recorded during the conveying movement F.
  • the acquired surface information 23 is transmitted to a pressure control 24.
  • This print control 24 determines, as a function of the detected surface information 23, print information by means of which the printing unit 12 is controlled to carry out the printing process, ie to print the narrow surface 17 with the narrow surface decoration 27.
  • the print controller 24 first uses the detected surface information 23 to determine the decor template 22, which represents the template for the workpiece decor 19 provided on the workpiece 11.
  • This decorative template 22 is stored in a data memory of the print controller 24. In this case, the decorative template 22 is determined on the basis of the surface information 23 from a large number of further decorative templates from a decor data set of the print controller 24.
  • the print information for controlling the printing process is determined or derived from the decor template 22 from a defined decor area 26.
  • the decorative cutout 21 provided as workpiece decoration 18 on the broad surface 16 is determined in a positionally precise manner in the decorative template 22 on the basis of the recorded surface information 23 and the dimensions of the workpiece 11.
  • the decorative area 26 adjoins this decorative cutout 21.
  • the decorative area 26 forms a strip-shaped section which is each formed adjacent to a side edge of the decorative cutout 21.
  • the width of the decorative area 26 corresponds to the thickness of the workpiece 11.
  • the narrow surface decoration 27 thus represents a copy of the decorative region 26.
  • the decorative region 26 in the decorative template 22 forms a type of extension of the decorative cutout 21, which is printed on the narrow surface 17.
  • a decor course that is exactly matched to one another is formed between the workpiece decor 19 on the broad surface 16 and the narrow surface decor 27 on the narrow surface 17.
  • the course of the decoration shown in FIG. 1 as the wood grain, thus transitions from the broad surface 16 into the narrow surface 17 in a precisely positioned manner. This creates an appearance of the workpiece 11 as if it is made of solid wood.
  • the print controller 24 controls the printing unit 12 to carry out the printing process.
  • the position of the printing unit 12 is determined by the positioning device 15 before the start of the printing process, and the printing unit 12 is correspondingly aligned with the narrow surface 17.
  • the positioning of the printing unit 12 takes place on the basis of the detected surface information 23 as a function of the course of the decoration of the workpiece decoration 19 on the wide surface 19.
  • the The actual printing process is started and the narrow surface decoration 27 is printed on the narrow surface 17, in particular on the coating material on the narrow surface 17.
  • the workpiece 11 is moved continuously or discontinuously by the conveying device 14 to the printing unit 12.
  • the acquisition of the surface information 23 and the execution of the printing process for printing the narrow surface decoration 27 can take place in particular in real time, ie immediately one after the other, so that the acquisition of the surface information and the execution of the printing process are provided essentially at the same time.
  • the method can also be designed so that the sensor device 13 detects the surface information 23 in an edge region of the wide surface 16 adjoining the narrow surface 17 to be printed during a movement towards the workpiece 11 and the printing information for controlling the printing unit 12, in particular in real time, through the Pressure control 24 can be determined from the detected surface information 23.
  • the pressure information is determined or derived from the detected surface information 23 of the edge area.
  • the printing unit 12 is controlled in order to carry out the printing process for printing the narrow surface decoration 27, the printing information being determined by the print controller 24 in such a way that the narrow surface decoration 27 forms a coordinated decoration course for the workpiece decoration 19 on the wide surface 19.
  • the acquisition of the surface information, the determination of the print information and the execution of the printing process take place essentially at the same time.
  • the surface information 23 already occurs during the production of the Workpiece 11 are detected, ie after the workpiece decoration 19 has been applied to the broad surface 19.
  • Surface information 23 is stored in the print controller 24 as workpiece-related data. If this workpiece 11 is subsequently fed to the printing device 10 in order to print the narrow surfaces 17, the workpiece-related data is retrieved, the corresponding printing information is determined by the printing controller 24 and the printing unit 12 is activated to carry out the corresponding printing process.

Abstract

L'invention concerne un procédé d'impression sur une surface étroite (17) d'une pièce (11), selon lequel des informations de surface (23) relatives à au moins une surface de la pièce qui est adjacente à la surface étroite (17) sur laquelle l'impression doit être réalisée sont détectées optiquement au moins par endroits au moyen d'un dispositif de détection (13), les informations de surface (23) détectées sont transmises à une commande d'impression (24) qui, en fonction desdites informations de surface (23) détectées, détermine des informations d'impression pour commander une unité d'impression (12). Ces informations d'impression permettent de commander un processus d'impression au moyen duquel un décor de surface étroite (27) est imprimé sur la surface étroite (17), ce décor étant adapté à un profil de décor de la surface de la pièce détectée optiquement. L'invention concerne également un dispositif d'impression (10) pour réaliser une impression sur des surfaces étroites (17) d'une pièce (11).
EP21700768.1A 2020-01-21 2021-01-18 Procédé d'impression sur une pièce et dispositif d'impression Pending EP4093612A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020101308.6A DE102020101308A1 (de) 2020-01-21 2020-01-21 Verfahren zum Bedrucken eines Werkstücks und Druckeinrichtung
PCT/EP2021/050913 WO2021148340A1 (fr) 2020-01-21 2021-01-18 Procédé d'impression sur une pièce et dispositif d'impression

Publications (1)

Publication Number Publication Date
EP4093612A1 true EP4093612A1 (fr) 2022-11-30

Family

ID=74187317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21700768.1A Pending EP4093612A1 (fr) 2020-01-21 2021-01-18 Procédé d'impression sur une pièce et dispositif d'impression

Country Status (5)

Country Link
US (1) US20230038080A1 (fr)
EP (1) EP4093612A1 (fr)
CN (1) CN114981091A (fr)
DE (1) DE102020101308A1 (fr)
WO (1) WO2021148340A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021133045A1 (de) 2021-12-14 2023-06-15 Homag Gmbh Verfahren zum Erzeugen eines Druckdekors, Verfahren zum Bedrucken eines Werkstücks sowie System
WO2023118053A1 (fr) 2021-12-20 2023-06-29 Ikea Supply Ag Système et procédé d'impression d'un motif sur une surface tridimensionnelle
DE102022101538A1 (de) 2022-01-24 2023-07-27 Homag Gmbh Verfahren zum Auftragen oberflächenmanipulierender Fluide auf eine Oberfläche eines Werkstücks und Auftragseinrichtung
AT526342B1 (de) * 2022-09-27 2024-02-15 Inkatronic Gmbh Vorrichtung und Verfahren zum Bedrucken von Objekten

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1726443B1 (fr) * 2005-04-28 2007-06-13 Homag Holzbearbeitungssysteme AG Procédé et appareil pour marquer les côtés d'une pièce detacheée plane
BE1016846A3 (nl) 2005-11-09 2007-08-07 Flooring Ind Ltd Vloerbekleding, vloerpanelen en werkwijze voor het vervaardigen van vloerpanelen.
PL1839883T3 (pl) * 2006-03-08 2017-08-31 Homag Holzbearbeitungssysteme Ag Sposób i urządzenie do zadrukowywania półwyrobów w kształcie płyty
US7918062B2 (en) 2006-06-08 2011-04-05 Mannington Mills, Inc. Methods and systems for decorating bevel and other surfaces of laminated floorings
DE102007017503B3 (de) 2007-04-13 2008-11-06 Bauer, Jörg R. Verfahren zum Herstellen eines Bauteils mit einer bedruckten Echtholzoberfläche sowie nach dem Verfahren hergestelltes Bauteil
DE202011000732U1 (de) * 2011-03-30 2011-06-09 Stainer, Arno Holzelemente mit Altholzdekor und Vorrichtung zu deren Herstellung
EP3415329B1 (fr) 2016-02-12 2021-04-28 Jitboards, S.L. Système, procédé et programme de délignage de pièces au moyen de l'impression

Also Published As

Publication number Publication date
DE102020101308A1 (de) 2021-07-22
CN114981091A (zh) 2022-08-30
WO2021148340A1 (fr) 2021-07-29
US20230038080A1 (en) 2023-02-09

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