WO2022248393A1 - Vorrichtung und verfahren zum veredeln eines werkstücks - Google Patents
Vorrichtung und verfahren zum veredeln eines werkstücks Download PDFInfo
- Publication number
- WO2022248393A1 WO2022248393A1 PCT/EP2022/063868 EP2022063868W WO2022248393A1 WO 2022248393 A1 WO2022248393 A1 WO 2022248393A1 EP 2022063868 W EP2022063868 W EP 2022063868W WO 2022248393 A1 WO2022248393 A1 WO 2022248393A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- unit
- workpiece
- sampling
- patterning
- conveyor
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 58
- 238000007639 printing Methods 0.000 claims abstract description 14
- 238000003754 machining Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000002023 wood Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims description 29
- 238000000059 patterning Methods 0.000 claims description 15
- 238000012795 verification Methods 0.000 claims description 14
- 238000007493 shaping process Methods 0.000 claims 2
- 230000001939 inductive effect Effects 0.000 abstract 1
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007730 finishing process Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010972 statistical evaluation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
- B41F19/001—Apparatus or machines for carrying out printing operations combined with other operations with means for coating or laminating
-
- 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
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0009—Central control units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
-
- 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
- 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
- B41J2/2121—Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter
- B41J2/2128—Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter by means of energy modulation
-
- 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
- B05D2252/00—Sheets
- B05D2252/04—Sheets of definite length in a continuous process
-
- 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
- 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
- B41J2/205—Ink jet for printing a discrete number of tones
- B41J2/2054—Ink jet for printing a discrete number of tones by the variation of dot disposition or characteristics, e.g. dot number density, dot shape
Definitions
- the invention relates to a device for finishing a workpiece, which preferably consists at least in sections of wood, wood-based materials, plastic or the like, according to the preamble of claim 1, and a corresponding method.
- workpieces are often first made of a wood-based material and then their surface is finished.
- Various coating materials are used in the finishing process, which can be sampled before the coating process or can only be sampled after the coating process.
- EP 1 935 657 A1 discloses a generic device and a method for coating workpieces, in which the workpieces are first machined and then treated by means of an ink jet
- this object is achieved by a device for finishing a workpiece according to claim 1 and a method for finishing a workpiece according to claim 12 .
- Particularly preferred developments of the invention are specified in the dependent claims.
- the invention is based on the knowledge that in known devices the operating parameters and the working speed of the individual machine components are not sufficiently matched to one another.
- the invention proposes that a control unit be provided in a generic device, which is connected to the processing unit, the conveyor unit and the sampling unit and set up to control the processing unit, the conveyor unit and the sampling unit.
- This control-technical integration makes it possible for the operating parameters, the working speed and other properties of the machine components to be optimally coordinated with one another depending on the current requirements (such as workpiece dimensions, material properties, finishing requirements, etc.) in order, among other things, to optimize the performance and in particular the to increase workpiece throughput.
- the integration of the control technology also enables other advantages, such as the possibility of improved optical and haptic properties, since the processing and finishing company of the Processing unit and the sampling unit can be optimally coordinated.
- the sampling unit was often a limiting factor for the performance of the overall process, so that a possibly higher performance, for example of a processing unit, could not be fully exploited.
- the integration of control technology now makes it possible, for example by optimally adjusting the operating parameters of the sampling unit, to increase the individual performance of the sampling unit and thus the overall performance of the device or the overall process.
- the conveyor unit is set up to bring about a relative movement speed of at least 10 m/min, preferably at least 30 m/min, particularly preferably at least 50 m/min, during the processing unit and the sampling unit.
- the device according to the invention advances into performance areas that could not previously be achieved.
- productivity can be increased enormously, and on the other hand, the device according to the invention is also suitable for workpieces that are produced in extremely large numbers and at correspondingly high speeds, such as floor or wall panels.
- the conveyor unit is set up to bring about the relative movement between the workpiece and the machining unit and the sampling unit in one setting.
- multiple alignment and clamping of the workpieces and possible intermediate stacking can be dispensed with.
- particularly high Finishing speeds made possible, which makes a further contribution to increasing productivity.
- the control unit is preferably set up to set at least one operating parameter of the sampling unit, taking into account a setpoint conveying speed of the conveying unit.
- the operation of the sampling unit can be optimally adapted to the target conveying speed of the conveying unit, the target conveying speed resulting, for example, from the maximum processing speed of the processing unit.
- the conveying speed of the device according to the invention can be maximized, as a result of which productivity can be significantly increased.
- various operating parameters of the sampling unit can be set to the desired performance, such as clock frequency, material throughput, etc.
- control unit is set up to change, in particular to reduce, the target conveying speed of the conveying unit if the control unit cannot determine any suitable operating parameters of the sampling unit for the previous target conveying speed. In this way, it is ensured that, despite the maximum conveying speed, the required quality of the sampling can still be achieved, while the maximum speed potential of the sampling unit is exploited.
- the sampling unit can be designed in different ways. With regard to a high sampling quality, variable sampling options and a high sampling speed, it is provided according to a further development of the invention that the sampling unit has a drop on-demand printing unit. It is particularly preferred that the drop-on-demand printing unit is set up to variably set the droplet size and/or droplet ejection frequency. By setting these operating parameters, the operation of the sampling unit can be adapted particularly effectively to different conveying speeds without impairing the quality of the sampling result. At the same time, further advantageous effects can also be achieved by adjusting the droplet size and/or the droplet ejection frequency, such as haptic effects of the patterned surface or the setting of different “grey levels” (ink quantity-dependent intensity levels).
- grey levels ink quantity-dependent intensity levels
- the droplet size can be set to values of less than 200 pl, preferably less than 100 pl, particularly preferably less than 20 pl (picoliter), according to a development of the invention.
- the droplet ejection frequency can be set to values of at least 16,000 Hz, preferably 20,000 Hz, particularly preferably 100,000 Hz.
- the device has a checking unit for preferably optical checking of the surface of the workpiece patterned by the patterning unit. This makes it possible to effectively check whether the patterning unit actually provides the patterned surface with the desired patterning quality, which is particularly advantageous given the desired high conveying speeds and generally enables the process to be optimized. It is particularly preferred that the verification unit is connected to the control unit, so that the results of the verification unit directly Optimizing the operation of the sampling unit can be used.
- the inspection unit has a camera, in particular a multispectral camera or hyperspectral camera. Hyperspectral cameras in particular have proven to be extremely effective.
- one development of the invention provides that the control unit is set up to correct at least one operating parameter of the sampling unit based on the verification result of the verification unit, preferably during operation of the device.
- the quality of sampling can be optimized particularly effectively and waste can also be minimized, since the test results can be fed back "in-line” if necessary and used directly to optimize the operating parameters of the sampling unit.
- Fig. 1 shows a schematic side view of a device according to an embodiment of the invention
- a device 1 for finishing a workpiece 2 is shown schematically in FIG. 1 in a side view.
- the workpiece can be, for example, a furniture panel, a floor/wall panel or a structural element such as a door, where the starting material of the workpiece can be, for example, wood, various wood materials, plastic and various combinations thereof.
- the workpiece is to be finished in the area of a surface 2 ′, which can be a narrow surface of the workpiece 2 , for example.
- the device 1 initially comprises a processing unit 10, which in the present embodiment is a milling unit which is used to bring the narrow surface 2' of the workpiece 2 to be finished into the desired geometry .
- the processing unit 10 has a milling tool 12 in the present embodiment.
- the processing unit 10 can also be designed for other processing operations, such as for example for the application of a coating material or the flush milling of an applied coating material.
- the device 1 includes a patterning unit 20 for patterning the surface 2′ of the workpiece, which in the present embodiment is a printing unit that is described in more detail below.
- a conveyor unit 30 is provided, which in the present embodiment is designed as a continuous conveyor unit and is used to move the respective workpiece 2 along the processing unit 10 and the sampling unit 20 .
- conveying concepts can also be used within the scope of the invention, such as so-called stationary technology, in which the workpiece and the respective units of the device are stationary be moved. Mixed forms of both concepts are also possible within the scope of the invention.
- the conveyor unit 30 comprises a conveyor belt or a conveyor chain 32 on which the respective workpiece 2 is placed, with the upper strand moving from right to left in FIG.
- the conveyor unit 30 has a so-called top pressure 34 which, in the present embodiment, is formed by a large number of rollers which press the respective workpiece 2 onto the conveyor belt or the conveyor chain 32 .
- the conveying unit 30 can be operated with different conveying speeds, which can be in the range of up to 200 m/min and more.
- control can refer to pure control (without feedback) or also to regulation (with feedback), depending on requirements.
- the control unit can be, for example, a common machine computer, in which the essential data of the above-mentioned units converge and which controls the above-mentioned units, i. H. in particular adjusts its operating parameters.
- Embodiment first a target conveying speed of Conveyor unit 30, which is based on the processing speed of the processing unit 10 that can be achieved for the respective workpiece 2, taking into account, for example, the geometry and the material properties.
- the control unit 40 sets one or more operating parameters of the sampling unit 20 in such a way that the sampling unit 20 can also work appropriately at the given setpoint conveying speed, so that a desired sampling result can be achieved.
- control unit 40 lowers the target conveying speed of the conveying unit 30 to a value at which an appropriate operation of the sampling unit 20 can be achieved, but the highest possible conveying speed of the conveying unit 30 can still be achieved.
- the sampling unit 20 is a printing device which has a drop-on-demand printing unit 22, although other sampling units can of course also be used within the scope of the present invention.
- the drop-on-demand printing unit 22 can contain a piezo print head or a bubble jet print head, for example.
- the printing unit 22 is capable of variably adjusting the droplet size that is output, with the droplet size being able to reach values of up to 2 pl (picoliters) in the present embodiment. Depending on the application, however, larger values are also useful, which can advantageously be in the range of up to 200 pl without the invention is limited thereto. Adjusting the droplet size enables the patterning unit 20 to be adapted to different conveying speeds, but also allows haptic effects and various color effects such as "gray levels" (color-amount-dependent intensity levels) to be achieved.
- the printing unit 22 is also able to set, for example, the droplet ejection frequency to values in the order of, for example, 20,000 Hz or even 100,000 Hz or more, as well as other operating parameters.
- the droplet ejection frequency can be set, for example, by software, in particular by defining different pulse shapes, which are applied, for example, to piezo elements provided in the printing unit 22 .
- the device 1 Downstream of the sampling unit 20, the device 1 also includes a checking unit 50, which has a multispectral or hyperspectral camera 52 in the present embodiment.
- the camera 52 scans the patterned surface 2 ′ of the workpiece 2 .
- the verification unit 50 is also connected to the control unit 40 so that a verification result of the verification unit 50 can be transmitted to the control unit 40 .
- the control unit 40 corrects one or more operating parameters of the sampling unit 20 in order to further optimize the quality of the sampling result or to further approximate a desired target value.
- This correction can also take place, for example, on the basis of a statistical evaluation and can be carried out "in-line", ie during operation of the device.
- the operation of the device 1 takes place, for example, as follows. First, a workpiece 2 is fed to the device 1 in such a way that it is clamped between the conveyor belt or the conveyor chain 32 and the top pressure 34 (right in Fig. 1) and conveyed in a continuous conveying direction (from right to left in Fig. 1). Taking into account the properties of the workpiece and the desired finishing processes, the control unit 40 first determines a target conveying speed for the
- Processing unit 10 is suitable, and then sets the operating parameters of the sampling unit 20 in a suitable manner. If necessary, the conveying speed can also be reduced as described above. It should also be noted that the conveying speed does not necessarily have to be adjusted for each individual workpiece 2, and that the device 1 can also work for different workpieces 2 within a certain permissible bandwidth of the conveying speed and operating parameters.
- the workpiece 2 then reaches the machining unit 10 and is machined there by means of the machining tool 12 in the area of its narrow surface 2'.
- the machined narrow surface 2' is patterned using the patterning unit 20, and then the checking unit 50 carries out a check on the patterned surface 2'.
- the result of the verification of the verification unit 50 is transmitted to the control unit 40, which adjusts the operating parameters of the sampling unit 20 if there are defined deviations in the verification result from the desired sampling. In certain cases, deviations may also require adjustment of the processing unit 10 (e.g. to a different speed of the tool) or of the conveyor unit 30 (e.g. to a different conveyor speed) if these parameters differ in the respective case can affect the quality of the sampling result.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quality & Reliability (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22731111.5A EP4347266A1 (de) | 2021-05-27 | 2022-05-23 | Vorrichtung und verfahren zum veredeln eines werkstücks |
CN202280037269.XA CN117355418A (zh) | 2021-05-27 | 2022-05-23 | 用于精加工工件的设备和方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021113681.4 | 2021-05-27 | ||
DE102021113681.4A DE102021113681A1 (de) | 2021-05-27 | 2021-05-27 | Vorrichtung und Verfahren zum Veredeln eines Werkstücks |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022248393A1 true WO2022248393A1 (de) | 2022-12-01 |
Family
ID=82100089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/063868 WO2022248393A1 (de) | 2021-05-27 | 2022-05-23 | Vorrichtung und verfahren zum veredeln eines werkstücks |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4347266A1 (de) |
CN (1) | CN117355418A (de) |
DE (1) | DE102021113681A1 (de) |
WO (1) | WO2022248393A1 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1832429A2 (de) * | 2006-03-08 | 2007-09-12 | Homag Holzbearbeitungssysteme AG | Vorrichtung zum Bemustern von Werkstücken |
EP1935657A1 (de) | 2006-12-20 | 2008-06-25 | Homag Holzbearbeitungssysteme AG | Vorrichtung und Verfahren zum Beschichten von Werkstücken |
US20080239042A1 (en) * | 2006-03-08 | 2008-10-02 | Homag Holzbearbeitungssysteme Ag | Process And Apparatus For The Printing Of Panel-Shaped Workpieces |
AT507848B1 (de) * | 2009-01-29 | 2011-06-15 | Durst Phototechnik Digital Technology Gmbh | Vorrichtung und verfahren zum aufbringen von fluidtropfen |
US20140199531A1 (en) * | 2013-01-11 | 2014-07-17 | Floor Iptech Ab | Dry ink for digital printing |
DE102019112868A1 (de) * | 2019-01-23 | 2020-07-23 | Homag Gmbh | Transportsystem sowie Transportverfahren |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006030624A1 (de) | 2006-07-04 | 2008-01-17 | Rehau Ag + Co | Verfahren zum Herstellen und Montieren einer bedruckten Kantenleiste |
DE102010024785A1 (de) | 2010-06-23 | 2011-12-29 | Baumer Innotec Ag | Verfahren und Vorrichtung zum Digitaldruck von Dekoren |
DE102019206431A1 (de) | 2019-05-03 | 2020-11-05 | Hymmen GmbH Maschinen- und Anlagenbau | Verfahren zum Herstellen einer Struktur auf einer Oberfläche |
-
2021
- 2021-05-27 DE DE102021113681.4A patent/DE102021113681A1/de active Pending
-
2022
- 2022-05-23 EP EP22731111.5A patent/EP4347266A1/de active Pending
- 2022-05-23 WO PCT/EP2022/063868 patent/WO2022248393A1/de active Application Filing
- 2022-05-23 CN CN202280037269.XA patent/CN117355418A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1832429A2 (de) * | 2006-03-08 | 2007-09-12 | Homag Holzbearbeitungssysteme AG | Vorrichtung zum Bemustern von Werkstücken |
US20080239042A1 (en) * | 2006-03-08 | 2008-10-02 | Homag Holzbearbeitungssysteme Ag | Process And Apparatus For The Printing Of Panel-Shaped Workpieces |
EP1935657A1 (de) | 2006-12-20 | 2008-06-25 | Homag Holzbearbeitungssysteme AG | Vorrichtung und Verfahren zum Beschichten von Werkstücken |
AT507848B1 (de) * | 2009-01-29 | 2011-06-15 | Durst Phototechnik Digital Technology Gmbh | Vorrichtung und verfahren zum aufbringen von fluidtropfen |
US20140199531A1 (en) * | 2013-01-11 | 2014-07-17 | Floor Iptech Ab | Dry ink for digital printing |
DE102019112868A1 (de) * | 2019-01-23 | 2020-07-23 | Homag Gmbh | Transportsystem sowie Transportverfahren |
Also Published As
Publication number | Publication date |
---|---|
CN117355418A (zh) | 2024-01-05 |
EP4347266A1 (de) | 2024-04-10 |
DE102021113681A1 (de) | 2022-12-01 |
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