Device and method for mechanically mattifying chamfers on decorative panel edges and decorative panel with a mechanically mattified chamfer

Abstract

The present invention relates to a device and a method for mechanically matting bevels on a decorative panel edge. In particular, the invention relates to a device and a method for inline matting of bevels on a profile edge of a decorative panel. Furthermore, the present invention relates to a mechanically matted bevel on a decorative panel and to a decorative panel with a mechanically matted bevel.A device (100) for mechanically matting a bevel (111) on the edge (112) of a decorative panel (110) is disclosed, comprising an embossing roller (200), an angle straightening unit (300), a pressure straightening unit (500), and a conveying device (600) for conveying the decorative panel (110) in a conveying direction (800), wherein the embossing roller (200) has an embossed structure (201) on its surface, wherein the embossing roller (200) can be aligned by means of the angle straightening unit (300) with regard to its relative angle α to the bevel to be matted and wherein the pressure of the embossing roller (200) on the bevel to be matted can be adjusted by means of the pressure straightening unit (500).

Description

[0001] The present invention relates to a device and a method for mechanically matting bevels on a decorative panel edge. In particular, the invention relates to a device and a method for inline matting of bevels on a profile edge of a decorative panel. Furthermore, the present invention relates to a mechanically matted bevel on a decorative panel and to a decorative panel with a mechanically matted bevel.

[0002] For the purposes of the invention, the term "decorative panel" refers to wall, ceiling, door, or floor panels that feature a decorative pattern applied to a carrier plate. Decorative panels are used in a variety of ways, both in the interior design of rooms and for the decorative cladding of buildings, for example, in trade fair construction. One of the most common uses for decorative panels is as floor coverings or for cladding ceilings, walls, or doors. These decorative panels often feature a pattern and surface structure intended to imitate a natural material.

[0003] Decorative panels usually consist of a carrier or core made of a solid material, for example a wood-based material such as a medium-density fiberboard (MDF) or high-density fiberboard (HDF), a wood-plastic composite material (WPC) or a mineral-plastic composite material (MPC), which is provided on at least one side with a decorative layer and a cover layer and optionally with further layers, for example a wear layer arranged between the decorative and cover layers. In the case of MDF or HDF carriers, the decorative layer is usually applied to a printing substrate arranged on the carrier, which can be formed, for example, from a paper layer.It is known to print the decorative layer onto the paper layer before applying the paper layer to the substrate, or to apply an initially unprinted paper layer to the substrate and then apply the decorative layer to the paper layer using a so-called direct printing process. In the case of substrates based on plastic composite materials, it is known to apply a decoration to them using a direct printing process after applying a printing substrate, if necessary.

[0004] Decorative panels are typically profiled at their edges. The resulting profiles are suitable for connecting decorative panels to one another, thus creating a mechanically connected surface that corresponds to a multiple of a single decorative panel. The corresponding connecting profiles can be designed as a single piece or to accommodate a separate connecting element.

[0005] Chamfers are often incorporated into the upper edge of the connecting profile closest to the decorative layer to create a more pleasing visual appearance and, in particular, to visually minimize any height offset that may occur at the connection point between adjacent decorative panels. This chamfer can encompass a wear-resistant layer applied to the decorative panel, the decorative layer, and / or the carrier.

[0006] Appropriate bevels can be introduced into the decorative panel edge, for example, by milling, cutting, pressing or compacting the corresponding area.

[0007] WO 2012 / 004701 discloses using a thermoplastic layer, such as PVC, as the wear layer. This document also discloses removing part of the cover layer at the edge of the panel to create a depressed edge area in the form of a bevel that extends below the printing level. Such a bevel can then be provided with a separate decorative coating. Such a bevel can create the impression of inauthenticity and detract from an otherwise well-executed replica on the top side of the panel.

[0008] From WO 2006 / 066776, it is known to create a bevel by deforming the substrate, wherein the print and the wear layer, in this case, for example, a thermosetting wear layer, extend continuously from the central upper side of the panels above the aforementioned bevel. The production of such a bevel is complex. The present invention is primarily directed to cutting tools that make it possible to obtain an alternative coated panel that, according to various preferred embodiments, offers a solution to the problems encountered with the cutting tools and / or coated panels of the prior art.

[0009] Decorative panels according to the invention preferably comprise a substrate or carrier and a decorative cover layer, wherein the aforementioned decorative cover layer comprises a decorative print and a transparent wear layer and / or wear protection layer provided thereon. The bevel is formed by a recessed edge region on at least one edge, wherein both the aforementioned decorative print and the aforementioned wear layer and / or wear protection layer extend continuously from a central surface of the decorative panel across the bevel.

[0010] The present invention is based on the problem that in many decorative panels the bevels often shine, which can make the visual impression of the connection point between two adjacent panels appear less pleasing. Many attempts are made to achieve a more pleasing visual appearance of the bevels by coating or varnishing them with a separate coating agent and / or varnish. However, this solution is costly and time-consuming due to the use of an additional material. Furthermore, such coating and / or varnishing can result in what is known as overspray, whereby the coating agent and / or varnish not only gets onto the area of ​​the bevel to be treated, but also onto the rest of the decorative panel.This in turn can lead to optical disadvantages, which can ultimately result in the rejection of corresponding panels, which in turn results in increased production costs.

[0011] It is therefore the object of the present invention to provide a device and a method with which the visual appearance of bevels on decorative panels can be improved without applying additional coatings and / or varnishes. Furthermore, the object of the present invention is to provide a corresponding bevel for a decorative panel and a decorative panel equipped with a corresponding bevel.

[0012] This object is achieved by a device according to claim 1 and a method according to claim 9, furthermore by a chamfer according to claim 11 and a decorative panel according to claim 13.

[0013] The invention proposes a device for mechanically matting a bevel on the edge of a decorative panel, comprising an embossing roller, an angle straightening unit, a pressure straightening unit, and a conveying device for conveying the decorative panel in a conveying direction, wherein the embossing roller has an embossed structure on its surface, wherein the embossing roller can be aligned by means of the first position straightening units with regard to its relative angle α to the bevel to be matted and wherein the pressure of the embossing roller on the bevel to be matted can be adjusted by means of the pressure straightening unit.

[0014] It has surprisingly been found that bevels introduced into the edge of a decorative panel, in particular where they essentially comprise the wear layer and / or wear-resistant layer, can be modified in their surface by mechanical means in such a way that gloss is avoided. In particular, the device according to the invention can be used to mechanically structure the surface of the bevel with a fine structure, which allows a reduction of the degree of gloss (expressed as reflectometer value R`) to a value ≥40, preferably ≥30, more preferably ≥20, in particular ≥15. This can significantly improve the visual impression of the bevel, and the edge area of ​​a decorative panel takes on a more natural visual appearance overall.

[0015] In principle, it can be provided according to the invention that the embossing roller has an embossing structure of knurling type RAA (knurling with axially parallel grooves), RBL (left-hand knurling), RBR (right-hand knurling), RGE (left-right knurling, raised tips (fishing skin)), RGV (left-right knurling, recessed tips), RKE (cross knurling, raised tips), RKV (cross knurling, recessed tips), or RTR (circular knurling (continuous)).

[0016] According to a preferred embodiment of the invention, the embossing roller can have a cross knurling, left-hand knurling, right-hand knurling, or left-right knurling as the embossing structure. In particular, the knurling can have a pitch T in a range of 0.8 mm ≥ T ≥ 0.05 mm, in particular in a range of 0.6 mm ≥ T ≥ 0.1 mm, such as 0.5 mm.

[0017] According to one embodiment of the invention, it can be provided that the device has a plurality of embossing rollers arranged one behind the other in the conveying direction. In particular, it can be provided that the embossing rollers have different or identical embossing structures. If the embossing rollers have identical or largely identical structures, it can preferably be provided that the embossing rollers are aligned with one another in such a way that they produce an embossed pattern arranged offset from one another in the chamfer or on the surface of the chamfer. Of course, a correspondingly offset arrangement of the embossing rollers with respect to one another is also possible in the case in which the embossing rollers have different structures.

[0018] According to a further embodiment of the invention, the number N of embossing rollers arranged one behind the other in the conveying direction can be in a range of 8 ≥ N ≥ 2, preferably in a range of 6 ≥ N ≥ 4.

[0019] According to one embodiment of the invention, the device can be provided with angle straightening units separately assigned to the respective embossing rollers. This makes it possible to align the embossing rollers in such a way that the embossing patterns generated by them in the bevel or on the surface of the bevel appear offset from one another. The offset arrangement allows for greater variance in the embossing patterns generated by the embossing rollers while maintaining the same embossing structures. This, in turn, makes it possible to adapt the gloss level of the bevel to a desired or predetermined value.

[0020] According to one embodiment of the invention, it can therefore be provided that the device has position-aligning units separately assigned to the respective embossing rollers, and the embossing rollers can be aligned with respect to their offset (V) by means of the position-aligning units. According to a preferred embodiment of the invention, the offset of the embossing rollers relative to one another can be in a range of 0.15 mm ≥ V ≥ 0.05 mm.

[0021] According to one embodiment of the invention, it can be provided that consecutive embossing rollers in the conveying direction have, in the case of parallel knurling, opposing parallel knurls as the embossing structure, so that the overall embossing pattern ultimately created on the surface of the bevel essentially corresponds to the pattern of a cross knurl.

[0022] According to a further embodiment of the invention, it can be provided that the device has pressure straightening units separately assigned to the respective embossing rollers, and the embossing rollers can be separately adjusted by means of the pressure straightening units with regard to their pressure on the bevel to be matted. This advantageously makes it possible, in particular, to change the structural depth of the embossed patterns produced in the bevel by the embossed structures of the embossing rollers. It has been shown that the structural depth of the produced embossed patterns has at least an indirect influence on the gloss level of the bevel and thus offers a further adjustment option for adapting the gloss level of the bevel to a desired or predetermined value.

[0023] As already mentioned above, according to a further embodiment of the invention, the embossing rollers can have different embossed structures. The difference in the embossed structures can be due to a different surface geometry or structure depth (roughness) of the embossed structures. For example, if there are multiple embossing rollers arranged one behind the other in the conveying direction of the decorative panel, a first embossing roller can have a coarser structure than a subsequent second embossing roller.

[0024] According to a preferred embodiment of the invention, the embossing rollers themselves are made of a corrosion-resistant metal, in particular a hard metal or stainless steel, and have fine structures applied to their surface by etching techniques or laser structuring. Examples of suitable stainless steel materials are AISI No. 630, AISI 410, or AISI 304. Alternatively, an embossing roller can be constructed in several parts and consist of a roller support and an embossing tire placed thereon. The embossing tire can be made of a thin-layer sheet metal with a correspondingly structured outer surface. The roller support can preferably have a clamping device with which the embossing tire is fixed to the roller support. Such a configuration advantageously allows for a change in the embossing structure to require the replacement of not the entire embossing roller, but only the embossing tire.

[0025] According to a further embodiment of the invention, it can be provided that the first and / or position straightening unit and / or the pressure straightening unit has a servomotor which is connected to a central control unit for signaling purposes. In this case, it can be provided, in particular, that the control device is connected to an optical sensor which is designed to detect the value R` of the matting of the bevel before and / or after the mechanical matting of the bevel, and the control device is designed to output control signals to the servomotors of the position straightening units and / or pressure straightening units as a function of the R` value of the matting determined via the optical sensor, with the proviso that by changing the position of the embossing rollers relative to one another and / or to the bevel to be matted and / or by changing the pressure on the bevel to be matted, the matting produced corresponds to a predeterminable R` value.

[0026] According to a further embodiment of the invention, the embossing roller can be heated. In particular, the embossing roller can be heated using thermal oil, an induction heater, and / or a resistance heater. By heating or tempering the embossing roller, an improved embossing pattern can be achieved in the bevel.

[0027] According to a further embodiment of the invention, the embossing rollers can be connected to a drive, meaning that they are not only moved by the movement of the decorative panel in the conveying direction, but are actively driven. If a plurality of embossing rollers is provided, they can be driven via a common drive. Alternatively, the embossing rollers can each be connected to individual drives or their rotation speed can be individually adjusted.

[0028] According to a further embodiment of the invention, it can be provided that when providing several embossing rollers arranged consecutively in the conveying direction of the decorative panel, not all of the embossing rollers have an embossed structure, but instead a smooth surface. In particular, in such an embodiment, it can be provided that the first or the first embossing rollers with which an edge of a decorative panel comes into contact do not have an embossed structure. Thus, it can be provided that the decorative panels fed to the device do not have a bevel previously introduced by milling or other measures on their edge, but rather the bevel is first pressed in by the embossing rollers without an embossed structure. This advantageously allows bevel forming and mechanical bevel matting to take place in a single operation.

[0029] According to a further embodiment of the invention, it can be provided that in a production line in which a device according to the invention is provided, at least one holding roller is provided in the direction of the narrow edge of the panel, thus in the direction of the panel width, opposite the device, which holding roller is configured to generate counterpressure to the pressure exerted by the device according to the invention on the edge of the decorative panel or the bevel, in order to ensure proper guidance of the decorative panel in the production line. Alternatively or additionally, it can be provided that a counterpressure roller is provided above the device according to the invention.

[0030] The invention further relates to a method for mechanically matting a bevel on an edge of a decorative panel, comprising the method steps: a) feeding a decorative panel to a device according to one of claims 1 to 8; b) contacting the bevel with a first embossing roller, wherein the embossing roller is alignable with respect to its relative angle α to the bevel to be matted and wherein the pressure of the embossing roller on the bevel to be matted is adjustable by means of the pressure straightening unit; c) optionally contacting the bevel with at least one second embossing roller; wherein the relative angle α and / or the pressure is adjusted with the proviso that the matting obtained corresponds to a predetermined matting value.

[0031] Surprisingly, it has been shown that by means of such a process, a bevel of a decorative panel can be matted or its gloss level adjusted in such a way that its visual appearance appears significantly more natural, without the need for the application of an additional coating agent and / or varnish.

[0032] According to one embodiment of the method according to the invention, it can be provided that the adjustment of the relative angle α and / or the pressure is carried out by means of a servomotor, wherein the servomotor is connected in terms of signal technology to a central control device, wherein the control device is in turn connected to an optical sensor which is designed to detect the intensity of the matting of the mechanically matted bevels and wherein the control device outputs control signals to the servomotors of the position straightening units and / or pressure straightening units as a function of the intensity of the matting determined via the optical sensor, with the proviso that by changing the position of the embossing rollers relative to one another and / or to the bevel to be matted and / or by changing the pressure on the bevel to be matted, the matting produced corresponds to a predetermined intensity.

[0033] According to a preferred embodiment of the invention, the relative angle α of the embossing roller to the bevel to be matted can be in a range between + / - ≤15° and ≥0°, in particular between + / - ≤10° and ≥0°. It has been shown that by varying the relative angle α, a change or adjustment of the matting effect achieved by the embossing roller can be achieved. In particular, the pressure of the embossing roller can be varied across the width of the bevel by means of the relative angle α, so that there is a higher or lower pressure across the width of the phase area. In this way, in particular, the matting effect can be varied across the width of the bevel.

[0034] Preferably, the angle of the bevel relative to the surface of the decorative panel, hence the bevel angle β, is in a range between ≤25° and ≥5°, in particular in a range between ≤20° and ≥7.5°.

[0035] According to a further embodiment of the invention, the absolute angle A between the embossing roller and the central surface of the decorative panel is set in a range between ≤40° and ≥0°, in particular ≤30° and ≥5°.

[0036] Furthermore, the present invention relates to a mechanically matted chamfer, which has a fine structuring on its surface introduced by embossing. Fine structuring within the meaning of the present invention is understood to mean structuring with a structure depth in a range of ≥ 5 µm to ≤ 70 µm, preferably ≥ 10 µm to ≤ 50 µm. Accordingly, the mechanically matted chamfer has a structure depth in the aforementioned range.

[0037] The chamfer according to the invention can be used in particular for coated panels that are provided with coupling means on at least two opposite edges, allowing two such panels to be coupled together at the respective edges, thereby achieving locking in both the vertical and horizontal directions. With such panels, there is a risk that gaps may form between the connected edges after installation due to changes in the ambient atmosphere, for example, changes in temperature or humidity. A chamfer can be used to mask such gaps.

[0038] According to a preferred embodiment of the invention, the mechanically matted bevel has a reflectometer value R` according to DIN EN 67530 at a measuring angle of 85° of ≥30, preferably ≥20, more preferably ≥15, in particular ≥10. It has been shown that matting is achieved in this area that supports the natural optical appearance of the bevel. For this purpose, the above-mentioned wear layer and / or wear protection layer can have a lower gloss level or reflectometer value at the location of the bevel than on the central surface of the decorative panel or at least have a gloss level that is lower than that of the immediately adjacent part of the surface of the decorative panel and / or the aforementioned wear layer / wear protection layer.A lower gloss level of the surface of the recessed edge area can create an additional depth effect, making the recessed edge area appear deeper than it actually is. Preferably, the above-mentioned lower gloss level is present over at least 50% of the length of the respective edge compared to the central area or a directly adjacent part of the area, and even better, over essentially the entire length or the entire length of the respective edge.

[0039] It is not excluded that the central surface itself may have multiple gloss levels. In such a case, it is important that the gloss level of the recessed edge area is lower than the gloss level of a directly adjacent section of the top surface of the floor panel, preferably over most of the length of the respective edge.

[0040] Furthermore, the present invention relates to a decorative panel having a mechanically matted bevel, wherein the bevel has a fine structure on its surface introduced by means of embossing.

[0041] According to one embodiment of the decorative panel according to the invention, the chamfer can extend exclusively across the thickness of the wear-resistant layer / wear layer. In such an embodiment, the fine structure of the chamfer is incorporated exclusively into the wear-resistant layer / wear layer.

[0042] According to a preferred embodiment of the invention, the decorative panel has a core made of a polymer-containing material. In a further embodiment, it can be provided, in particular, that the bevel is at least partially incorporated into the core. In such an embodiment, the fine structure at least partially also encompasses the part of the core visible in the edge region.

[0043] According to the most preferred embodiment, a lowered edge region with a lower gloss level is provided on at least two opposite edges of the decorative panel. In the case of a rectangular elongated coated panel, this preferably concerns the pair of long edges. Of course, it is not excluded that such a lowered edge region, hence a bevel, could be used on all edges of a rectangular panel. In the case of an elongated rectangular panel, the gloss level of the bevel on the pair of long edges is preferably lower than the gloss level of the bevel on the pair of short edges, so that the lowered edge region on the bevel of the short edge pair gives the impression of being deeper than on the bevel of the long edges.It is also possible to use an area with mechanically matted bevels according to the invention on one pair of edges, for example the long edge pair, while on the other pair of edges, for example the short edge pair, a bevel is used that has not been mechanically matted.

[0044] The difference in gloss level between the bevel and the central covering surface or a part of the covering surface directly adjacent to the lowered edge area is preferably at least 10 points, determined according to DIN 67530.

[0045] According to a preferred embodiment of the decorative panel according to the invention, it has a core made of a mineral-plastic composite material. The plastic component of the core can be polypropylene, polyethylene, polyethylene terephthalate, and / or polyurethane, and the mineral component of the core can be phyllosilicate, chalk, calcium carbonate, calcium sulfate, magnesium oxide, and / or quartz. The decorative panel particularly preferably has a core made of talc-polypropylene, talc-polyethylene, or talc-polypropylene-polyethylene. In particular, according to one embodiment of the invention, the core of the decorative panel can be PVC-free.

[0046] According to a further embodiment of the decorative panel according to the invention, it has a plastic film, in particular a polypropylene, polyethylene, polypropylene / polyethylene, polyurethane or polyethylene terephthalate-based film, as a wear-resistant layer / wear layer. Fig. 1 shows a plan view of an embodiment of a device 100 according to the invention; Fig. 2 shows a perspective view of the Fig.1 shown device 100; Fig. 3 shows a section in AA direction of the Fig. 1 device shown; Fig. 4 shows a section in BB direction of the Fig. 1 device shown; Fig. 5 shows an embodiment of an embossing roller 200; Fig. 6 shows various embossing structures 201, 211, 221, 231, 241 for embossing rollers 200, 210, 220, 230, 240 that can be provided according to the invention; Fig. 7 shows an example of a decorative panel 110; and Fig. 8 shows an example of a section through a decorative panel 110.

[0047] Fig. 1 shows an embodiment of a device 100 according to the invention for mechanically matting a bevel on the edge of a decorative panel, comprising an embossing roller 200, an angle straightening unit 300, and a pressure straightening unit 500. In the embodiment of the invention shown, the device 100 has a plurality of embossing rollers 210, 220, 230. The decorative panel is moved in a conveying direction over the device 100 by means of a conveyor device. The embossing roller 200 has an embossed structure on its surface. In the embodiment of the device 100 shown, the embossing rollers (200, 210, 220, 230) arranged consecutively in the conveying direction of the decorative panel can have identical or different embossed structures. By means of the angle straightening unit 300, the embossing rollers 200, 210, 220, 230 can be aligned with respect to their relative angle α to the bevel to be matted.In the shown embodiment of the device 100, the angle straightening unit 300 is formed by a static angle element which positions a bearing block 280 which accommodates the embossing rollers (200, 210, 220, 230) at a corresponding angle to the vertical, so that the resulting angle relative to the surface to be matted.

[0048] The pressure of the embossing roller (200) on the bevel to be matted can be adjusted using the pressure straightening unit (500).

[0049] Fig. 2 a perspective view of the Fig.1 The device 100 shown in FIG. 1 is shown in FIG. The device 100 can be easily integrated into existing profiling systems for decorative panels. After profiling the edge of the decorative panel 100, by means of which, for example, connecting profiles are milled into the edge of the decorative panel, the decorative panel is fed to the device 100. As it passes through the device 100, the bevel on the edge of the decorative panel comes into contact successively with the embossing rollers 200, 210, 220, 230, which leave embossed patterns in the bevel of the edge by means of the embossed structures provided on their surface. The angle at which the embossing rollers 200, 210, 220, 230 are aligned to the edge of the decorative panel and ultimately to the bevel can be adjusted by the angle element 300, by means of which the bearing block 280, which accommodates the embossing rollers 200, 210, 220, 230, can be erected relative to the vertical and thus also to the edge of the decorative panel and the bevel.

[0050] Fig. 3 shows a section in AA direction of the Fig. 1 The device 100 shown here. The angle adjustment unit 300 can be seen, with which the bearing block 280, which accommodates the embossing roller 200, can be aligned relative to the vertical. This allows the angle at which the embossing roller 200 strikes the bevel of the edge of the decorative panel to be adjusted. The pressure with which the embossing roller 200 presses onto the bevel of the edge of the decorative panel can be adjusted using the pressure adjustment unit 500.

[0051] Fig. 4 shows a section in BB direction of the Fig. 1 The device 100 shown is shown. The angle straightening unit 300 can be seen, with which the bearing block 280, which accommodates the embossing roller 200, can be aligned relative to the vertical. This allows the angle at which the embossing roller 200 strikes the bevel of the edge of the decorative panel to be adjusted. The position of the embossing roller 200 relative to other embossing rollers arranged upstream or downstream of the embossing roller 200 shown in the conveying direction can be adjusted using the position straightening unit 400. This makes it possible to offset the individual embossing rollers relative to one another, so that the embossing structures of the embossing rollers leave embossed patterns in the bevel that are offset from one another, whereby the degree of matting can be adjusted over a wide range.

[0052] Fig. 5 shows an embodiment of an embossing roller 200, as may be provided in the device 100 according to the invention. The embossing roller 200 has an embossed structure 201 on its surface, which, when pressed with appropriate pressure onto the bevel of the edge of the decorative panel, leaves a corresponding embossed pattern in the surface of the bevel.

[0053] Fig. 6 shows various embossed structures 201, 211, 221, 231, 241 for embossed rollers 200, 210, 220, 230, 240 which can be provided according to the invention. The embossed structure can, for example, have a knurl type RAA (knurl with axially parallel grooves) 201, RBL (left-hand knurl) 211, RBR (right-hand knurl) 221, RGE (left-right knurl, raised tips (fish skin)) 231, or RKE (cross knurl, raised tips) 241.

[0054] Fig. 7 shows, by way of example, a decorative panel 110. The decorative panel 110 may have a bevel on its long edge 112 and / or its short edge 112a. To enhance the natural appearance of this bevel, the invention provides for the bevel to be mechanically matte by introducing a structure. The introduced structure diffusely refracts the light in the area of ​​the bevel, creating a more matte impression compared to the unstructured area.

[0055] Fig. 8 shows an example of a section through a decorative panel 110. A chamfer 111 is provided on the edge 112 / 112 a. In the area of ​​the chamfer 111, the surface is matt by mechanically introducing an embossed pattern 114. List of reference symbols

[0056] 100Device 110Decorative panel 111Bevel 112Long edge 112Short edge 113Core 114Embossing pattern 200Embossing roller 201Embossing structure 210Embossing roller 211Embossing structure 220Embossing roller 221Embossing structure 230Embossing roller 231Embossing structure 240Embossing roller 241Embossing structure 280Bearing block 300Angle straightening unit 400Position straightening unit 500Pressure straightening unit

Claims

1. Device (100) for mechanically matting a bevel (111) on the edge (112) of a decorative panel (110), comprising an embossing roller (200), an angle straightening unit (300), a pressure straightening unit (500), and a conveying device (600) for conveying the decorative panel (110) in a conveying direction (800), wherein the embossing roller (200) has an embossed structure (201) on its surface, wherein the embossing roller (200) can be aligned by means of the angle straightening unit (300) with regard to its relative angle α to the bevel to be matted and wherein the pressure of the embossing roller (200) on the bevel to be matted can be adjusted by means of the pressure straightening unit (500).

2. Device (100) according to claim 1, wherein the device has a plurality of embossing rollers (200, 210, 220, 230, 240) arranged one behind the other in the conveying direction (800).

3. Device (100) according to claim 2, wherein the device has angle straightening units (300) separately assigned to the respective embossing rollers (200, 210, 220).

4. Device (100) according to claim 2 or 3, wherein the device has position-aligning units (400) separately assigned to the respective embossing rollers (200, 210, 220), and the embossing rollers (200, 210, 220, 230, 240) can be aligned with respect to one another with regard to their offset (V) by means of the position-aligning units (400).

5. Device (100) according to claims 2 to 4, wherein the device has pressure straightening units (500) separately assigned to the respective embossing rollers (200, 210, 220, 230, 240), and the embossing rollers (200, 210, 220, 230, 240) can be separately adjusted by means of the pressure straightening units (500, 510, 520) with regard to their pressure on the bevel (111) to be matted.

6. Device according to one of claims 2 to 5, wherein the embossing rollers (200, 210, 220, 230, 240) have different embossing structures (201, 211, 221, 231, 241).

7. Device according to one of the preceding claims, wherein the angle straightening unit (300) and / or the position straightening unit (400) and / or the pressure straightening unit (500) comprises a servo motor which is connected by signaling to a central control unit.

8. Device according to claim 7, wherein the control device is connected to an optical sensor which is set up to detect the value R` of the matting of the mechanically matted fiber and wherein the control device is set up to output control signals to the servomotors of the angle straightening unit (300) and / or the position straightening unit (400) and / or pressure straightening units (500) as a function of the strength of the matting determined via the optical sensor, with the proviso that by changing the position of the embossing rollers relative to one another and / or to the bevel (111) to be matted and / or by changing the pressure on the bevel (111) to be matted, the matting produced corresponds to a predeterminable R` value.

9. A method for mechanically matting a bevel (111) on the edge (112) of a decorative panel (110), comprising the method steps: a) feeding a decorative panel to a device (100) according to one of claims 1 to 8; b) contacting the bevel (111) with a first embossing roller (200), wherein the embossing roller (200) is alignable with respect to its relative angle α to the bevel to be matted and wherein the pressure of the embossing roller (200) on the bevel to be matted is adjustable by means of the pressure adjustment unit (500); c) optionally contacting the bevel (111) with at least one second embossing roller (210, 220, 230); wherein the relative angle α and / or the pressure and / or the offset V are adjusted with the proviso that the matting obtained corresponds to a predetermined matting value.

10. The method according to claim 9, wherein the adjustment of the relative angle α and / or the pressure is carried out by means of a servomotor, wherein the servomotor is connected by signal technology to a central control device, wherein the control device is in turn connected to an optical sensor which is designed to detect the intensity of the matting of the mechanically matted bevels (111) and wherein the control device outputs control signals to the servomotors of the angle straightening unit (300) and / or the position straightening unit (400) and / or pressure straightening units (500) as a function of the intensity of the matting determined via the optical sensor, with the proviso that by changing the position of the embossing rollers (200, 210, 220, 230) relative to one another and / or to the bevel (111) to be matted and / or by changing the pressure on the bevel (111) to be matted, the matting produced corresponds to a predetermined intensity.

11. Mechanically matted bevel, which has a fine structure on its surface introduced by means of embossing.

12. Mechanically matted bevel, which has a reflectometer value R` according to DIN EN 67530 at a measuring angle of 85° of ≥30, preferably ≥20, more preferably ≥15, in particular ≥10.

13. Decorative panel, having a mechanically matted bevel (111), wherein the bevel (111) has a fine structure on its surface introduced by means of embossing.

14. Decorative panel according to claim 13, wherein the fine structure introduced by embossing has a structure depth in a range of ≥ 5 µm to ≤ 70 µm, preferably ≥ 10 µm to ≤ 50 µm µm.

15. Decorative panel according to one of claims 13 or 14, wherein the decorative panel has a core made of a polymer-containing material and wherein the chamfer (111) is at least partially incorporated into the core.

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