EP4448291A1 - Verfahren zum bedrucken eines werkstücks, druckeinrichtung sowie computerprogramm - Google Patents
Verfahren zum bedrucken eines werkstücks, druckeinrichtung sowie computerprogrammInfo
- Publication number
- EP4448291A1 EP4448291A1 EP22838666.0A EP22838666A EP4448291A1 EP 4448291 A1 EP4448291 A1 EP 4448291A1 EP 22838666 A EP22838666 A EP 22838666A EP 4448291 A1 EP4448291 A1 EP 4448291A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- workpiece
- printed
- print template
- 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.)
- Withdrawn
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
- B41M5/0082—Digital printing on bodies of particular shapes
- B41M5/0088—Digital printing on bodies of particular shapes by ink-jet printing
-
- 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/21—Ink jet for multi-colour printing
-
- 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
- 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
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/021—Adaptations for printing on specific media
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
- H04N1/3871—Composing, repositioning or otherwise geometrically modifying originals the composed originals being of different kinds, e.g. low- and high-resolution originals
-
- 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
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
- G06T2207/30164—Workpiece; Machine component
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30168—Image quality inspection
Definitions
- the invention relates to a method for printing a surface of a workpiece, a printing device for printing a surface of a workpiece, and a computer program.
- a decoration for visual reasons, e.g. B. an imitation of a wood grain or the like.
- a decoration is printed onto the surface of the workpieces by a printing device, for example in the form of a multi-color printing process.
- a surface to be printed, e.g. B. a narrow surface of the workpiece can have different geometries, e.g. B. inclined, concave, convex or otherwise configured surface areas such as chamfers or radii. Color deviations or optical distortions can occur in these areas of the printed image, which can lead to an impairment of the print result.
- the invention is based on the object of proposing a method for printing surfaces of workpieces, by means of which a high-quality printing result can be achieved.
- the invention is based on the object Computer program for an optimized adjustment and
- a method of printing a surface of a workpiece is defined in claim 1 .
- a printing device for printing on a surface of a workpiece is defined in claim 11 .
- a computer program for adapting and providing a print template is defined in claim 12 .
- Subclaims relate to specific embodiments.
- Such a method allows a print template to be printed on a surface of the workpiece to be individually adapted to surfaces to be printed that have different geometric features.
- the print template for example a surface decoration, can be matched to the respective surface in order to achieve a high-quality optical print image.
- the surface to be printed a
- the artwork can be adapted only in a region that corresponds to the at least one geometric feature.
- An advantageous embodiment of the method can also provide that the print template is adapted to the at least one geometric feature in such a way that a printed image of the adapted print template printed on the surface of the workpiece is matched to the provided print template in the area of the at least one geometric feature.
- optical impairments in the printed image are avoided in this way, so that an image of the provided print template that is true to the original can be printed on the respective surface.
- a development of the method can provide that the artwork is adapted to the at least one geometric feature by changing at least one color feature, changing an image format, changing an image resolution, an image stretching, excluding an image area and/or the like.
- the at least one geometric feature can be particularly advantageous as a design of an edge region, a contour, an inclination, a recess, a bore, a fitting, a seal, an insert, a connection, a display and/or the like of the surface to be printed to be provided .
- the print template By adapting the print template according to the at least one geometric feature, such as in particular also the contour, it can be individually adapted to a design of the surface. This means that surfaces of any design can be printed with a high-quality print image.
- the at least one geometric feature can be designed as an at least partially inclined, convex, concave and/or recessed surface area of the surface of the workpiece to be printed. Areas not to be printed , e.g. B. Recesses, bores, grooves and the like can be left out when printing the surface. In this way, on the one hand, the printing process can be provided as one of the last processing steps within a manufacturing process and, on the other hand, printing ink can be saved.
- the surface information comprising the at least one geometric feature is provided from a workpiece data set or by manual input.
- the surface information can be provided in advance as a workpiece data set, for example by a data set of a Workpiece manufacturer or by a processing device of a previous processing step.
- a further advantageous refinement of the method can provide for the surface information comprising the at least one geometric feature to be recorded by a recording device. In this way, workpiece tolerances can also be taken into account and balance .
- the detection device can preferably be configured as an optical system, e.g. B. as a camera system, laser system and/or spectrophotometer. Electromagnetic systems (such as radar) are also possible. In this way, in addition to a particularly effective workpiece tolerance compensation, the printing process can also be automated.
- the method can provide for the surface information to be provided, the print template to be adapted and/or the printing process to be carried out in immediate succession and/or simultaneously, preferably in real time.
- a particularly advantageous embodiment of the method can provide that a droplet size and/or droplet quantity applied by the printing unit is adapted to an angle of inclination of the at least one geometric feature in relation to a printing plane.
- an increasing droplet size and/or droplet quantity can preferably be discharged. In this way, an increased distance between the drops when printing on an inclined surface area can be compensated for. As a result, distortion and/or color deviations in the printed image can be prevented.
- the print image of the adapted print template printed on the surface is recorded after the printing process, and the adapted print template is matched to the print template provided to the print controller as a function of the recorded print image and/or the surface information.
- a control of the print result can be provided and, depending on the captured print image, a feedback fine adjustment of the adapted print template can take place.
- the task is also accomplished by a printing device for printing at least one surface of a workpiece at least one printing unit for executing a printing process and with a printing controller for controlling the at least one printing unit, wherein a method according to one of the previously described embodiments can be carried out by the printing unit.
- the printing device is preferably embodied as a digital printing device, by means of which in particular a multi-color printing process can be carried out.
- the digital printing device can be, for example, an inkjet printing device that works, for example, according to the drop-on-demand principle.
- the printing unit and/or the workpiece can be provided so as to be movable relative to one another.
- Such a printing device can be used to print a print template, for example a surface decoration, with a high-quality optical print image on individual surfaces of workpieces.
- Such a computer program can enable an optimized adaptation and provision of a print template in order to form an image of a print template that is true to the original on individual surfaces of workpieces.
- Fig. 1 shows a schematic view of a printing device for printing on a surface of a workpiece
- Fig. 2 shows a schematic representation of embodiments of workpiece surfaces to be printed
- Fig. 3 shows a schematic illustration which illustrates an underlying problem when printing a surface of a workpiece
- Fig. 4 shows a flow chart of a method for printing a surface of a workpiece
- Fig. 5 shows a graphic representation of the method according to the flowchart in FIG. 4 based on a print template and a surface of a workpiece to be printed;
- Fig. 6 shows an exemplary representation of an adapted print template for printing on a surface of a workpiece
- FIG. 1 shows a highly schematic view of a printing device 10 for printing workpieces 11 .
- workpieces 11 which are at least partially made of wood, a wood material, plastic, composite material or the like.
- the workpieces 11 can be formed from a stone material, mineral material, metal material or the like.
- the workpieces 11 can preferably be designed as plate-shaped workpieces 11, for example as Solid wood board, particle board, fiber board or the like. Such workpieces 11 can be provided, for example, for the production of furniture or components.
- Wide surfaces 13 and/or narrow surfaces 14 of the workpiece 11 can be provided with a coating material, which can advantageously consist entirely or partially of plastic.
- the surfaces 12 of the workpiece 11 preferably the narrow surfaces 14 of the workpiece 11 , can be printed by the printing device 10 .
- the printing device 10 comprises a printing unit 16 for carrying out the printing process and a printing controller 17 for controlling the printing unit 16 .
- the printing unit 16 includes one or more print heads for applying printing ink 18 .
- the printing inks can be UV and/or water-based and/or solvent-based inks, lacquers, primers and/or paints.
- the one or more printheads can be configured to eject a variable droplet size.
- the printing device 10 can have a detection device 19 by which surface information of the workpiece 11 can be detected.
- the detection device 19 can be an optical device, e.g. B. a camera device, laser device and/or a spectrophotometer.
- the recorded surface information is transmitted to the print controller 17 .
- the surface information includes at least one geometric feature 21 of the surface 12 to be printed.
- the geometric feature 21 is formed by a rounded edge area of the narrow surface 14 of the workpiece 11 .
- This configuration of the geometric feature 21 is only an exemplary embodiment, as shown in FIG. 2 clarifies .
- the geometric feature 21 can also be formed by an inclined surface 12, by one or more inclined surface areas on the surface 12, for example a chamfer, by a completely rounded surface 12, by a surface 12 that is at least partially concave and/or convex in shape, or by a flat surface 12 on which at least one geometric feature 12 is provided.
- the geometric feature 21 can also be formed by a contour of the surface 12 to be printed and/or as a recess, a bore, a fitting, a seal, an insert, for example a threaded insert, a connection, a display and/or the like on the surface 12 be .
- Fig. 3 illustrates an underlying problem of printing surfaces 12 with a geometric feature 21 using the example of a rounded edge area.
- FIG. 3 shows the workpiece 11 with the surface 12 to be printed, which has two geometric features 21 in the form of rounded edge regions.
- Fig. 3 shows a schematic print image of a decoration printed on the surface 12 by a standard printing process.
- This schematic print image uses the honeycomb structure W to illustrate an impairment of the print image due to distortion in the rounded edge areas of the surface 12 (upper and lower area R) due to the geometric features 21 compared to a print image reproduced true to the original on the flat surface area of the surface 12 (middle area M ) .
- FIG. 3 based on the color gradient F shown, an impairment of the printed image due to a color deviation in the edge areas (upper and lower area R) compared to the flat surface area (middle area M), which is due to the geometric
- FIG. 4 shows a flow chart of the method
- FIG. 5 shows a graphic representation of the method according to the flowchart in FIG. 4 based on a provided artwork 22 and an example of a workpiece 11 to be printed.
- the print template 22 provided forms a decorative template, for example with a wood grain, as shown in FIG. 5 shown according to step S 10 .
- a print controller 17 determines a print template 23 adapted to the surface 12 to be printed in the form of print information for activating the print unit 16 .
- the Provided print template 22 adapted by the print controller 17 based on the surface information, taking into account the geometric features 21 to the surface 12 to be printed.
- the adapted print template 23 forms a geometric image of the surface 12 to be printed, taking into account the geometric features 21.
- the geometric features 21 can be designed in different ways. Consequently, the print template 22 provided is adapted to the respective geometric feature 21 depending on the respective shape of the geometric feature 21 .
- the adaptation of the print template 22 provided to the respective geometric feature 21 can be done in different ways.
- the print template 22 provided is adapted to the respective geometric feature 21 by changing at least one color feature at least in some areas, such as an amount of ink and/or color density, an image format, an image resolution, an image stretching at least in some areas and/or removing one at least in some areas image area .
- the at least regionally changing of at least one color feature includes changing at least one hue, color saturation, color contrast, brightness and/or the like.
- the print template 22 that is provided is preferably only adjusted by the print controller 17 in areas that correspond to the geometric features 21 .
- a third step S30 the pressure information determined by the print controller 17, which of the adapted print template 23 correspond to control the printing unit 16 transmitted to this.
- a fourth step S40 the actual printing process is carried out and the adapted print template 23 is printed onto the surface 21 of the workpiece 11 .
- a fine adjustment or Optimization of the adapted print template 23 takes place by capturing the print image of the adapted print template 23 printed on the surface 12 .
- the print image can be captured by the capture device 19 or by another capture device and transmitted to the print controller 17 .
- the print controller 17 can then match the adapted print template 23 to the provided print template 22 as a function of the recorded print image and/or in conjunction with the surface information. optimize .
- the surface information is processed and the print template is adapted in the print controller 17 .
- the print control is to be understood in a broad sense and, for example, the adaptation of the print template can also take place spatially separately from the printing unit.
- suitable image processing systems can be used, for example, and the adapted print template can then be transmitted to the print controller in a suitable manner.
- Fig. 6 additionally shows a further exemplary representation of an adapted print template 23 for printing on a Surface 12 of a workpiece 11 .
- This once again clarifies the color adjustment and stretching of a print template 22 in the rounded edge areas (upper and lower area R) compared to the flat surface area (middle area M) due to the geometric features 21 .
- the provided print template 22 is consequently adapted by the print controller 17 in the manner already described above by stretching and color adjustment to the geometric features 21 of the surface 12 to be printed, so that a print image printed on the surface 12 of the workpiece 11 of the adapted print template 23 in the area of the geometric features 21 is matched to the print template 22 provided.
- the print template 22 that is provided is stretched as a function of a curvature of the edge regions of the surface 12 .
- the stretching of the print template 22 occurs the more strongly the more curved the corresponding area of the surface 12 is formed. Because of the stretching, the print template 22 provided must be larger in terms of area than the surface 12 to be printed.
- An elongation gradient of the print template 22 in the area of the geometric feature 21 is provided in the direction of an inclination gradient of the surface 12 to be printed.
- the stretching gradient can also be adapted to a viewing angle of the geometric feature 21 .
- the print template 22 provided is adjusted in terms of color as a function of the curvature of the surface 12 in order to print a print image on the surface 12 that matches the print template 22 provided.
- a droplet size and/or droplet quantity of the printing inks applied by the print head or heads can also be adjusted.
- an increasing curvature (depending on the slope gradient) of the surface 12 an increasing droplet size and/or droplet quantity can be discharged. In this way, the problem of increased drop spacing when printing on a sloping surface 12 can be compensated for and the effect of distortion and color deviation can be compensated for.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- General Engineering & Computer Science (AREA)
- Printing Methods (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021133044.0A DE102021133044A1 (de) | 2021-12-14 | 2021-12-14 | Verfahren zum Bedrucken eines Werkstücks, Druckeinrichtung sowie Computerprogramm |
| PCT/EP2022/085544 WO2023110829A1 (de) | 2021-12-14 | 2022-12-13 | Verfahren zum bedrucken eines werkstücks, druckeinrichtung sowie computerprogramm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4448291A1 true EP4448291A1 (de) | 2024-10-23 |
Family
ID=84829755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22838666.0A Withdrawn EP4448291A1 (de) | 2021-12-14 | 2022-12-13 | Verfahren zum bedrucken eines werkstücks, druckeinrichtung sowie computerprogramm |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250058575A1 (de) |
| EP (1) | EP4448291A1 (de) |
| CN (1) | CN118541266A (de) |
| DE (1) | DE102021133044A1 (de) |
| WO (1) | WO2023110829A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024000998A1 (de) | 2024-03-20 | 2025-09-25 | Michael Weinig Aktiengesellschaft | Verfahren zum Aufbringen einer Grafik auf ein Endprodukt, vorzugsweise einen Holzstab, sowie Vorrichtung zur Durchführung eines solchen Verfahrens |
| DE102024128437B3 (de) | 2024-10-01 | 2026-04-16 | Koenig & Bauer Ag | Verfahren zum Herstellen eines bedruckten plattenförmigen Dekorobjekts |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7360853B2 (en) | 2004-03-04 | 2008-04-22 | Fujifilm Dimatix, Inc. | Morphology-corrected printing |
| JP5097566B2 (ja) * | 2008-01-25 | 2012-12-12 | パナソニック株式会社 | 建材の縁部処理方法 |
| DE102009007114C5 (de) | 2009-02-02 | 2014-03-13 | Guido Schulte | Verfahren zum Herstellen einer Oberfläche eines Bauteils, dessen Verwendung sowie Oberfläche eines Bauteils |
| AT509149A3 (de) * | 2009-11-27 | 2012-03-15 | Durst Phototechnik Digital Technology Gmbh | Verfahren zur adaptiven anpassung des volumenstroms der ausgestossenen tinte |
| DE102011086015A1 (de) | 2011-11-09 | 2013-05-16 | Krones Aktiengesellschaft | Verfahren und Vorrichtung für den Tintenstrahldruck auf gekrümmte Objektoberflächen |
| EP2708675A1 (de) * | 2012-09-17 | 2014-03-19 | Akzenta Paneele + Profile GmbH | Dekorpaneel |
| JP6287352B2 (ja) | 2014-03-04 | 2018-03-07 | 株式会社リコー | 画像処理装置、画像処理プログラム、画像処理方法、及び画像処理システム |
| DE102018121570A1 (de) * | 2018-09-04 | 2020-03-05 | ISP GmbH & Co. KG | Verzerrungsfreie Beschichtung von Fahrzeug Interieur-Oberflächen |
| WO2021245659A1 (en) * | 2020-06-01 | 2021-12-09 | Veev Group, Inc. | System, method and computer program product for side printing on solid surfaces |
-
2021
- 2021-12-14 DE DE102021133044.0A patent/DE102021133044A1/de active Pending
-
2022
- 2022-12-13 EP EP22838666.0A patent/EP4448291A1/de not_active Withdrawn
- 2022-12-13 CN CN202280082134.5A patent/CN118541266A/zh active Pending
- 2022-12-13 WO PCT/EP2022/085544 patent/WO2023110829A1/de not_active Ceased
- 2022-12-13 US US18/719,242 patent/US20250058575A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20250058575A1 (en) | 2025-02-20 |
| DE102021133044A1 (de) | 2023-06-15 |
| WO2023110829A1 (de) | 2023-06-22 |
| CN118541266A (zh) | 2024-08-23 |
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