EP2507063A2 - Method and device for generating a three dimensional surface structure on a work piece - Google Patents

Method and device for generating a three dimensional surface structure on a work piece

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Publication number
EP2507063A2
EP2507063A2 EP10771793A EP10771793A EP2507063A2 EP 2507063 A2 EP2507063 A2 EP 2507063A2 EP 10771793 A EP10771793 A EP 10771793A EP 10771793 A EP10771793 A EP 10771793A EP 2507063 A2 EP2507063 A2 EP 2507063A2
Authority
EP
European Patent Office
Prior art keywords
workpiece
characterized
paint
preferably
radiation
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.)
Granted
Application number
EP10771793A
Other languages
German (de)
French (fr)
Other versions
EP2507063B1 (en
Inventor
René Pankoke
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.)
Theodor Hymmen KG
Original Assignee
Theodor Hymmen KG
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
Priority to DE102009044710 priority Critical
Priority to DE102009044802.0A priority patent/DE102009044802B4/en
Application filed by Theodor Hymmen KG filed Critical Theodor Hymmen KG
Priority to PCT/EP2010/066827 priority patent/WO2011064075A2/en
Publication of EP2507063A2 publication Critical patent/EP2507063A2/en
Application granted granted Critical
Publication of EP2507063B1 publication Critical patent/EP2507063B1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0029Formation of a transparent pattern using a liquid marking fluid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers, 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
    • B41J11/002Heating or irradiating, e.g. by UV or IR, or drying of copy material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/06Veined printings; Fluorescent printings; Stereoscopic images; Imitated patterns, e.g. tissues, textiles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041Digital printing on surfaces other than ordinary paper
    • B41M5/0047Digital printing on surfaces other than ordinary paper by ink-jet printing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041Digital printing on surfaces other than ordinary paper
    • B41M5/0064Digital printing on surfaces other than ordinary paper on plastics, horn, rubber, or other organic polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0045After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by mechanical wave energy, e.g. ultrasonics, cured by electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams, or cured by magnetic or electric fields, e.g. electric discharge, plasma
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081After-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

Abstract

The invention relates to a method and device for generating a three dimensional surface structure on a work piece comprising the following steps: feeding a work piece printed with a décor pattern to a processing station; spraying a transparent, radiation-curing varnish through a plurality of nozzle openings onto the surface of the work piece in the form of varnish droplets, wherein the individual varnish droplets have a volume of 0.5 - 300 pl, preferably 3 - 80 pl, particularly preferably 10 - 50 pl, and the number of varnish droplets per surface unit and/or the volume of varnish droplets occurs by means of computer control according to a digital template; and curing of the transparent varnish by means of radiation, preferably by means of UV radiation.

Description

 Method and device for producing a three-dimensional surface structure on a workpiece The present invention relates to a method and a device for producing a three-dimensional surface structure on a workpiece, in particular on a web-shaped or plate-shaped workpiece.

For the production of decorative surfaces in the field of indoor and outdoor applications, e.g. For furniture surfaces such as cabinets, table tops, floorboards, such as laminate flooring or real wood parquet floor) or for wall or Deckenpaneeie, there are according to the current state of the art, various methods both for decorative printing of these surfaces and for applying a haptic three-dimensional surface structure ,

In the field of laminate flooring production, for example, according to the current state of the art, a printed decorative paper, white, is printed in a gravure printing machine with a décor (for example an oak, beech or maple replica). In a further step, this so-printed paper is coated with a thermosetting resin system, e.g. an amino resin, such as a urea-melamine mixture or the like, impregnated and dried back to a defined residual moisture. This so treated, printed and impregnated decor paper is placed in a third cut in a hot press, e.g. a short-cycle press or a double-belt press, pressed onto a wood-based panel, at the same time the resin with which the paper has been impregnated, is cured.

Through the use of a structured press plate, which has ridges and depressions by an etching process, a structured surface is created during the curing process, which is often designed to match the wood grain of the printed wood decor.

In the state of the art known today, this method can be modified in many variants. For example, other impregnated papers are applied above or below the printed decor paper. The plate-shaped workpieces used can be, for example, chipboard, MDF boards or HDF boards, which are produced according to the known state of the art. Similarly, a so-called decorative laminate, such as a "high pressure laminate", a so-called HPL, or a "continuous pressure laminate", a so-called CPL, of a plurality of impregnated papers, at least one of which is a decorative printed paper, in a pressing process compressed to a usually between 0.2 and 1, 2 mm thick laminate. This thus obtained abrasion-resistant and very resistant laminate (often as a web) is then glued, for example, to a 16- or 20 mm thick chipboard to give as a final product a kitchen countertop.

In a similar manner, furniture panels can be produced which are coated and embossed on one or both sides.

In an alternative known method, the print is produced directly on a precoated plate at the location of a printed and then impregnated paper. For this purpose, with the aid of an indirect gravure printing method in which rotogravure cylinder prints via an intermediate, rubberized transfer cylinder on the plate passing below, are generated. In an alternative method, the decor is printed directly over a multi-pass or single-pass digital printer on the precoated plate or pre-coated sheet material.

In the case of digital printing, the prior art very often uses a UV-curable digital ink containing as its main base an acrylate which has been added with special photoinitiators and thereby irradiated, e.g. cured with UV rays or electron beams. To give such a decorative coated plate a scratch-resistant surface and to provide this surface accordingly with a textured haptic appearance, so that the structure has a relation to the decorative image printed underneath, is usually also provided as the top layer, a transparent, radiation-curing acrylate lacquer application.

As the decorative printed surface underneath can show a variety of other decorative surfaces as well as woody appearances, such as stone impressions, tiles or even a fantasy pattern, the overlying structure was to be adapted to the décor printing in a multitude of different cases be: The joints of a tile replica should be, for example, recessed compared to the tile surface shown.

In the prior art, this structure is e.g. applied over a grooved or with the help of a laser structured, rubberized applicator roll (DE 10 2007 019 871 A1).

In a direct printed, plate-shaped workpiece, which is to be structured with a radiation-curing paint system in the surface, i. To obtain a structured surface, there are according to the current state of the art (DE 10 2007 019 87 A1) significant restrictions on the fineness of the structure. According to the current state of the art, with the structured roller a structure width of <1 mm can be printed only with difficulty. A preferred structural width of <0.2 mm is not possible according to the prior art.

Likewise, it is not possible to use any structures, e.g. also transversely to the passage direction distinct characteristics have (see, for example, tile joints longitudinal and transverse!) To produce. With the current state of the art are particularly wood grains, which run mostly in the direction of production, generated.

Likewise, it is only with great limitations and with great technical effort possible to create a structure that adapts synchronously to the underlying printed image. In particular, if the printed image changes quickly and only small lot sizes are produced, the expense is e.g. to use a new structured roller in the production machine, very large. A quick change of structures is only possible with a correspondingly great effort.

Likewise, it is not possible according to the prior art to produce the structure from transparent paints which have different properties, such as gloss levels. The variant which is feasible according to the prior art in short-cycle presses with Melaminverpressung, namely in a recess ("pore") to produce a low gloss level and above the pores in the normal range, a high gloss level, or vice versa in the pore high gloss - Grad and above the pore a matte structure, is not possible with the acrylate surface according to the prior art. It is the object of the method according to the invention and of the device according to the invention to provide a structured surface which avoids the abovementioned disadvantages. This object is achieved by a method having the features of claim 1 or 15, as well as a device having the features of claim 18. Advantageous embodiments are described in the subclaims.

By means of the invention, a workpiece is to be coated with a radiation-curing lacquer, it being possible to produce the lacquer layer synchronously with the underlying printed decoration with little technical effort. The lacquer layer can be quickly changed from one printed section to the next printed section, and which can produce defined matt and defined glossy spots in the surface structure while at the same time providing at least partial transparency.

In the present invention, a surface texture or a structured surface means a tangible unevenness on a plate or a sheet-like workpiece which has a height difference of between 3 μm and 3 mm between the lowest and the highest point and which is at least partially transparent.

The method according to the invention can also be used to produce a so-called synchronous pore. Thus, for the present invention, it is meant that the generated dret-dimensional surface texture matches the underlying printed decorative image. For example, in an exemplary embodiment with a printed wood decor having a longitudinal grain and a printed knothole at one location, the generated surface structure would also have a three-dimensional haptic tangible, longitudinal grain corresponding to the underlying printed one Grain and a round or oval textured depression at the location of the printed branch hole.

In this context, a synchronous pore is to be used in the present invention if a section of a length I and a width b which is optically recognizable in the decorative element is in the form of a three-dimensional, tangible, structured surface section lying above it. it is correct that the section of the structured surface lies suitably on the section visible in the printed decorative image and deviates in length and width by a maximum of 3 mm; in a preferred embodiment max. 1 mm; in a particularly preferred embodiment max. 0.5 mm deviates. In this particularly preferred embodiment, therefore, the section present in the three-dimensional surface structure would have a length of max. I +/- 0.5 mm and a width of b +/- 0.5 mm, and the starting point as a 0-point of a coordinate system thought in the X and Y direction each also a maximum of 0.5 mm from the starting point of the diverge from the underlying printed decorative image.

In one embodiment of the method according to the invention, it is provided that on a pretreated workpiece, for. As a wood-based panel such as particle board or MDF board, in a first step, a surface structure by a transparent or monochrome, z. B. white radiation-curing paint is applied. The application of this transparent or monochrome z. B. white radiation-curing paint is done as described above for the inventive method, by one or more printheads or printing modules with or without intermediate drying and with another printhead or print module. In this embodiment, therefore, the surface structure is applied before the printing decor of the decorative image. In a subsequent method step, the decorative image is then printed on the workpiece via a printing station. In this case, in a preferred embodiment, this subsequent printing of the decorative image can likewise be effected by means of an inkjet printing. Alternatively, a rotary printing process, for. B, an indirect gravure printing process, by means of an intermediate, rubberized applicator roll done. This intermediate, rubberized applicator roll can bring the applied color into the structure and the protrusions and depressions formed thereby. However, preference is given to an ink-jet printing method in which there is clearly greater certainty that the ink also penetrates into the elevations and depressions ("mountains and valleys"), thus producing a visually appealing, closed printed surface.

The invention will be explained in more detail below with reference to the attached figures. Show it: 1 shows a schematic representation of a device according to the invention with the workpiece (1.1) to be structured, a feed device (1.2), a printing device (1 .3) shown only as a box, a further feed device (1 .4) and a first print head for a first transparent lacquer (1 .5), alternatively one

Series of printheads (1.5), one drying unit (1 .7) or (1.8) and one second printhead (1 .6) for another transparent or the same transparent lacquer as (1.6), alternatively a row of printheads (1.6) ; the underlying conveyor system (1 .9).

Fig. 2a: In Fig. 2, the already decorative printed workpiece (2.1) to be structured is covered with individual droplets, with an example of a large droplet at the upper end of the volume, for example 300 pl (2.2) is shown, as well as a smaller Droplets, for example 10 pl (2.3). The resulting surface structure is the envelope of the deposited droplets (2.4); the maximum height of the structure ("structure height") is denoted by H (2.5).

Fig. 2b In Fig. 2b is the undesirable flow of an applied

 Droplet before curing by the droplet immediately after the

Application (2.6) and after a time t until hardening by (2.6a) shown. The height after the application of the droplet is represented by h, the height after the flow after the time t with h '.

Figure 3 is a schematic representation of a printed workpiece according to another embodiment.

Figure 4 is a schematic representation of a method according to the invention.

A plate-shaped or web-shaped workpiece 1 .1 is fed via a feed device 1 .2 to a printing machine 1.3, wherein the printing machine can be designed as a conventional printing machine, eg gravure printing machine or flexographic printing press or Roilen-off-set printing press. In an alternative embodiment, this can also be designed as a digital printing machine. After the plate-shaped or web-shaped workpiece has been decorative printed, it is fed via a further feed device 1.4 a first digital printhead 1.5. This first digital printhead 1.5 can also be designed as a printing module, wherein a printing module contains a number of individual printheads, which are each connected individually or together to a paint supply system. This printhead or these number of printheads in the print module are designed as inkjet printheads, preferably as piezo-controlled inkjet printheads. In a particularly preferred embodiment, the print heads 1.5 are designed as print heads with variable grayscale, ie they can apply different droplet sizes to the workpiece 1.1. The transparent lacquer, which is applied to the workpiece 1.1 by these print heads 1.5, is provided in a particular embodiment as a radiation-curing lacquer, wherein the radiation curing can be carried out by a UV radiation source 1.7. In a particular embodiment, this radiation source 1.7 can also be designed as an electron beam source. The inkjet printheads (1.5) deliver individual paint droplets onto the workpiece 1.1, wherein a single paint droplet has a volume of 0.5-300 pl, preferably a volume of 3-80 pi, more preferably a volume of 10-50 pl. The resolution, ie the amount of individual paint droplets per square centimeter surface of the workpiece is in the feed direction (arrow in Fig. 1) by the speed of the workpiece 1.1 and the frequency at which the paint droplets are discharged from the print heads 1.5 controlled. In the direction transverse to the feed direction, the resolution is controlled by the number of nozzles of the digital printheads 1.5, which are present per unit length.

In a preferred embodiment, the cross-directional resolution is between 10 to 500 dpi (dots per inch, i.e., droplets per 2.54 cm), more preferably 50-400 dpi. In the feed direction (arrow direction in FIG. 1), the resolution is in the same range at a value given by the speed and the frequency with which the droplets are introduced onto the surface. The frequency at which the droplets are discharged is therefore chosen so that at a feed rate of 5 - 100 m / min., Preferably 10 - 50 m / min., A resolution within the range specified above can be achieved.

After passing through the first application station of the transparent, radiation-curing paint with the print head 1.5 or the print module 1.5 with a variety of printheads, the applied paint is cured by the radiation source 1.7 In another embodiment, the radiation source 1.7 is tuned to the chemical properties of the paint, that it is not completely cured, ie not fully crosslinked, but only partially crosslinked.

Thereafter, the plate-shaped or web-shaped workpiece under a second printhead 1.6 or a second printing module with a plurality of print heads 1.6 ago. The order quantities and droplet sizes are selected here identical to the one or more heads 1.5. The second printhead 1.6 is used to achieve either a larger application amount and texture depth in the structured surface. In an alternative embodiment, the transparent lacquer that is printed in the print heads 1.6 may also have a different gloss level than that used in the print heads 1.5. Thus, for example, the varnish printed in the printheads 1.6 after hardening can give a very matt surface, while the varnish printed in the printheads 1.5 gives a high-gloss surface after hardening.

In an alternative embodiment, the glossy and the matt lacquer can also be reversed. After passing through the second print head or the second print head module with a plurality of print heads 1.6, the paint applied to the surface of the work piece 1.1 is cured in a second radiation source 1.8. In an alternative embodiment, it can only be hardened here and completely cured in a following radiation source.

In an alternative embodiment of the method according to the invention and the device according to the invention, in addition to the printheads or printhead rows 1.5 and 1.6, a plurality of further printhead rows with or without intermediate drying 1.7 and 1.8 can be attached. In this case, the desired structure of the surface, which is shown in FIG. 2 as a complete application of radiation-curing lacquer 2.5, can be combined from a plurality of layers, each with a multiplicity of droplets of different sizes. As an example, here in Fig. 2 (a) a large drop with the largest possible volume 2.2 is shown as well as a smaller drop with a correspondingly smaller amount 2.3. Placement of the droplet sizes results in the enveloping surface structure 2.4. The radiation-curing lacquer used is adjusted with its chemical properties such that bleeding into a flatter shape until radiation hardening of the lacquer within a period of less than 10 seconds, preferably less than 5 seconds, after the application of the lacquer by the print heads 1.5 or 1.6 does not affect the desired structure. This means that the height h of an applied drop on the workpiece 2.1 within the period of less than 10 seconds, preferably less than 5 seconds, between application and drying by the radiation source 1.7 is less than 30%, preferably less than 10%. , reduced by flowing. This is controlled by the viscosity and the tixotropy of the radiation-curing lacquer used (cf., FIGS. 2 (a) and (b), height h and h ', respectively).

In an alternative embodiment, the decorative printing of the workpiece 1.1 in the printing machine 1.3 may also be part of a preceding process which has already been completed, i. temporally and spatially separated from the inventive method to be used here. In this case, the method according to the invention begins with the application of the first droplets of the transparent, radiation-curing lacquer in the print head 1.5 or the row of print heads 1.5. The remainder of the process is then identical to that described above.

In a further alternative embodiment, the method may also provide that the print heads 1.5 and 1.6 and further print heads are arranged to be movable, ie either transversely to the feed direction or in the feed direction or both. In the case of this alternative embodiment, the workpiece progressively moves, then comes to rest as the printhead (s) 1.5 and 1.6, respectively, move across the workpiece in the longitudinal and transverse directions and release the corresponding print with transparent, radiation-curing paint, and thereafter advanced. The advantages of this method are the lower system costs, since it is also possible to work with a smaller number of printheads. The disadvantage is that the capacity of this alternative embodiment in produced surface per unit time is significantly lower. By fleeting the paint structure is meant in the present inventive method that the height of a droplet h in Fig. 2b is reduced to the height of the past droplet h 'in Fig. 2b. FIG. 3 shows a workpiece 3.1 with a structured and decorative printed surface. The workpiece 3.1 has one or more coatings 3.2 and 3.3 which are optional pre-coatings or primers. The reference numeral 3.4 shows an enveloping surface of droplets printed by the method according to the invention, which has a total of max. Height of H have. In this case, a drop 3.5 with a larger volume, z. B. 50 pl, and a droplet 3.6 with a smaller volume, z. B. 80pl be provided on the coating 3.3. Furthermore, a decor print image 3.7, ie the mixture of different colors, eg. B. two, three or four colors printed in this alternative embodiment on the previously sprayed paint as the top layer. On the decor print image 3.7, a further, transparent protective layer 3.8 is applied. This protective layer 3.8 can optionally be applied additionally. However, it is also possible to carry out the method according to the invention without the protective layer 3.8.

FIG. 4 schematically shows an embodiment of the method according to the invention. A workpiece 4.1 is precoated in a roller coater 4.31 with paint in a paint template 4.32. The thus applied gunding is completely or partially dried in a dryer 4.41, which can be designed either as a hot-air or circulating-air dryer or else with a radiation source 4.42.

In an applicator 4.51 droplets of a colored or transparent radiation-curing paint are applied in several printheads or several printhead rows, schematically indicated here at 4.52, 4.54 and 4.56, in several rows on the workpiece passing underneath. The paint is indicated here in tank stocks 4.58. Between the respective Tintenstrahi- printheads or rows of inkjet printheads existing radiation sources for partial or complete drying of the respectively applied paint droplets 4.53, 4.55 and 4.57 are mounted in an alternative embodiment. In an alternative embodiment, the workpiece thus treated can be completely dried through the drying unit 4.61. The following application unit, shown here as Walzenauftragsmaschäne 4.71, can apply a thin additional radiation-curing paint film on the thus pretreated workpiece. Between 4.71 and 4.81 would in this case yet another drying, not shown in the drawing, can be used. Subsequently, the decorative image is applied with at least two colors, ie a two-, three- or four-color print, possibly also more colors, in this case schematically a digital printing device with four colors, with respective print heads or print head rows 4.82, 4.84 , 4.86 and 4.88 as well as respectively alternatively possible intermediate drying as radiation sources 4.83, 4.85 and 4.87 shown. Subsequently, the thus coated and printed workpiece can be completely cured in a drying unit 4.91. Finally, in an alternative embodiment, a wear protection or protective layer can still be applied by the roller coating machine 4.92. In this case, another drying unit, not shown in the drawing, would join. In another alternative embodiment, not shown, the method of providing particularly large capacities of surfaces per unit of time with a high-quality three-dimensional surface may be provided with a plurality of successive rows of printheads, each of which emits only a volume size of droplets. But to achieve a well-structured surface, the first row of printheads, z. 1.5, a volume size of droplets in an exemplary embodiment is 50 pl. These are then dried between, the workpiece continues to move, passes under the second row 1.6 of printheads, which also give a constant size of droplet volume, which, however, compared to the first row 1.5 is significantly reduced. In a particularly preferred embodiment, this second droplet size is reduced to 50% or less of the volume of the first droplet size. It is also possible for a third row of printheads to deliver a further reduced, constant droplet volume size. With this alternative embodiment, the workpiece to be structured with a constant, high speed of z. B. 25 m / min. or 50 m / min. under printheads 1.5 and 1.6 to further print heads. As a result of the decreasing droplet size, both a flat structure and a flat, very sharply bent structure can be produced ("construction of a pyramid")

Claims

 claims
Method for producing a three-dimensional surface structure on a workpiece with the following steps:
A) feeding a printed with a decorative image workpiece to a processing station
 B) spraying a transparent, radiation-curing paint through a plurality of nozzle orifices onto the surface of the workpiece in the form of paint droplets, the individual paint droplets having a volume of 0.5-300 pl, preferably 3-80 pl, particularly preferably 10-50 pl, and the number of paint droplets per unit area and / or the volume of the paint droplets is computer controlled according to a digital template;
C) curing of the transparent coating with radiation, preferably by means of UV radiation.
A method according to claim 1, characterized in that the method with the steps B) - C) is repeated once or several times.
A method according to claim 1 or 2, characterized in that the sprayed-on, transparent and radiation-curing lacquer within a time of <10 seconds, more preferably <5 seconds, until cured by a radiation source by less than 30%, more preferably less than 15 %, drops in droplet height.
Method according to one of the above claims, characterized in that the maximum structure height applied by the method is 2 - 200 μm, preferably 10 - 100 μm, particularly preferably 15 - 60 μm.
Method according to one of the above claims, characterized in that in a first pass of steps B) and C) the
Paint droplets have a fixed, non-variable volume and at least a second repetition of steps B) and C) the paint droplets have a smaller volume than in the first order, preferably a volume of 50% of that volume in the first order according to steps B) and C).
Method according to one of the preceding claims, characterized in that for each application in step B) a number of 200- 40,000 droplets per cm 2 are applied, preferably 5,000 - 30,000 droplets per cm 2 .
Method according to one of the preceding claims, characterized in that in a first printhead (.5) or a first row of printheads (1.5) a paint is applied, which has a higher or lower gloss after curing than the paint, which with the second print head or the second row of print heads (1.6) is applied.
Method according to one of the preceding claims, characterized in that the generated surface structure is adapted to the underlying printed Dekorbtld so that certain visible in the decorative printing structures and corresponding surface structures, which were produced by the inventive method by less than 3 mm, preferably by less than 1 mm, differ from each other.
A method according to claim 8, characterized in that a position detection of the decorative image takes place and then takes place an adaptation of the surface structure of the decorative image.
0. Method according to one of the preceding claims, characterized in that the surface structure generated by the method is generated from the same electronic data record as the actual printed, decorative image. Method according to one of the preceding claims, characterized in that the decorative, printed image on the surface of the workpiece and the structured surface produced by the method with the steps A) - C) in a continuous process in succession and in a common device without interruption becomes.
Method according to one of the preceding claims, characterized in that the workpiece is a plate-shaped workpiece on which the decorative image is printed or already glued in the form of a web-shaped workpiece.
Method according to one of the preceding claims, characterized in that the workpiece is a wood-based panel, e.g. Particle board, MDF board or HDF board is on which the decor image is printed.
Method according to one of the preceding claims, characterized in that the workpiece comprises a web-shaped workpiece, e.g. a pre-treated paper or a plastic or PVC film, which is already printed with the decorative image.
Method for producing a decorative, three-dimensional surface structure with the following steps:
Feeding a workpiece to a processing station
Spraying a colored, radiation-curing paint through a plurality of nozzle openings on the surface of the workpiece in the form of paint droplets, wherein the individual paint droplets have a volume of 0.5 - 300 pl, preferably 3-80 pl, more preferably 10-50 pl, and the number of paint droplets per unit area and / or the volume of the paint droplets is performed by computer control according to a digital template; partial or complete curing of the dyed lacquer with radiation, preferably by means of UV radiation; and
Printing a decorative image on the surface of the workpiece with at least two different colors.
A method according to claim 15, characterized in that after step C) and before step D), a full-surface intermediate coating of the workpiece with a radiation-curing paint, preferably by means of a roll coater, with an application amount of 0.5 - 20 g / m 2 , preferably 1 -. 10 g / m 2 takes place.
A method according to claim 15 or 16, characterized in that the steps B) and C) are repeated at least twice, wherein in the first repetition of a uniform volume size of paint droplets is sprayed, and in the second repetition of a uniform, but smaller volume size of paint droplets is sprayed, for example, less than 50% of the volume of the paint droplets of the first application step.
Device for producing a three-dimensional surface structure on a workpiece with a feeding device of the workpiece to a first digital print head (1.5) or a first row of a plurality of print heads (1.5), applied by a transparent or colored, radiation-curing paint on the surface of the workpiece be able to and a behind it arranged radiation source (1.7).
Apparatus according to claim 18, characterized in that a one to multiple repetition of the structure with a respective further individual print head (1.6) or a further series of print heads (1.6) and a radiation source arranged behind it is provided.
20. Device according to one of the preceding claims 18 or 19, characterized in that at least two print heads are used, both of which a transparent, radiation-curing paint on the workpiece on where at least one of the printheads or a series of printheads applies a bright, glossy finish after cure, while the other printheads or printheads used apply a post-cure transparent, matt finish to the surface of the workpiece.
EP10771793.6A 2009-11-30 2010-11-04 Method for generating a three-dimensional surface structure on a work piece Active EP2507063B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE102009044710 2009-11-30
DE102009044802.0A DE102009044802B4 (en) 2009-11-30 2009-12-07 Method and device for producing a three-dimensional surface structure on a workpiece
PCT/EP2010/066827 WO2011064075A2 (en) 2009-11-30 2010-11-04 Method and device for generating a three dimensional surface structure on a work piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL10771793T PL2507063T3 (en) 2009-11-30 2010-11-04 Method for generating a three-dimensional surface structure on a work piece

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EP2507063A2 true EP2507063A2 (en) 2012-10-10
EP2507063B1 EP2507063B1 (en) 2014-09-10

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EP (1) EP2507063B1 (en)
DE (1) DE102009044802B4 (en)
ES (1) ES2525744T3 (en)
PL (1) PL2507063T3 (en)
WO (1) WO2011064075A2 (en)

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Also Published As

Publication number Publication date
DE102009044802B4 (en) 2017-11-23
ES2525744T3 (en) 2014-12-29
EP2507063B1 (en) 2014-09-10
WO2011064075A3 (en) 2012-06-07
WO2011064075A2 (en) 2011-06-03
PL2507063T3 (en) 2015-03-31
DE102009044802A1 (en) 2011-12-15

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