Cladding panel

Abstract

The invention relates to a cladding panel (1) with two flat sides (2,3) facing away from each other, wherein grooves (4,5) are formed on both flat sides (2,3), and wherein the grooves (4) on one flat side (2) have smaller groove depths than the grooves (5) on the other flat side (3).

Description

[0001] The invention relates to a cladding panel with two flat sides facing away from each other. Such cladding panels are used, for example, for cladding ceilings, walls and / or columns in order to give the surfaces of these structures a desired appearance or to influence the acoustic properties of the surfaces.

[0002] The German patent application DE 20 2018 106479 U1 discloses a panel- or plate-shaped acoustic element with a visible surface facing the room in its operating position, which is connected to an absorber layer on its flat side facing away from the room, characterized in that the absorber layer has a plurality of groove-shaped recesses on both its flat side connected to the visible surface and its flat side facing away from the room, which are oriented in approximately the same direction in their longitudinal extension, and in that slots are incorporated into the visible surface from the visible side of the acoustic element, which are arranged transversely to the recesses provided in the absorber layer and whose slot depth extends beyond the recesses provided in the flat side of the absorber layer connected to the visible surface to the recesses arranged on the flat side of the absorber layer facing away from the room, such thatthat these depressions and slots intersect at through-openings.

[0003] Publication FR 400 517 A discloses boards for floors, ceilings and cladding which have alternating incisions on both sides in the direction of the grain in order to make the boards elastic in one direction perpendicular to the grain.

[0004] Publication WO 2014 / 185795 A1 discloses a composite panel used as a building element for walkways, platforms, terraces, floors, and footbridges, and is particularly intended for outdoor use outside of buildings. This invention is a supplementary invention to the invention of application no. PL 401233.The composite material made of plastic and organic material with a fibrous structure is a foamed mixture whose density is at least 10%, preferably at least 20%, lower than the density of a solid organic-plastic composite made of the same components, wherein the layer of this foamed mixture is permanently and inseparably bonded to a solid plastic layer at least on the side opposite the homogeneous rubber-polyurethane composite, wherein the plastic preferably forms the uppermost layer and the thickness of the solid plastic layer is less than that of the organic plastic layer, preferably at least five times less and most preferably at least fifteen times less, and it is at least fifteen times less than the thickness of the rubber-polyurethane layer, most preferably at least twenty-five times less.The solid plastic layer can have a grooved or embossed structure, and the concavity is directed towards the interior of the solid plastic layer. The solid plastic layer is preferably bonded to the organic-plastic layer by a co-extrusion process. Publication CN 105 697 975 A discloses a novel wood-based composite material and belongs to the field of composite materials. The novel wood-based composite material uses solid lumber as a base. Artificial cavities, used to inhibit tree growth, are incorporated into the solid lumber, and the solid lumber with the artificial cavities serves as the base material of the wood-based composite. Add-on components are arranged on the base material, and the add-on components with different properties and the base material are combined to form the wood-based composite.The composite material alters the structural form and manufacturing process of existing wood, changes or enhances some of the properties of the wood, provides a novel concept and process for the efficient use of wood panels, and the novel wood-based composite material is revolutionary enough in the field of wood panels.

[0005] Document WO 2020 / 180237 A1 discloses a method for forming grooves in a plate element. The method comprises arranging the plate element in contact with a support element and forming at least one groove in a rear side of the plate element by removing material, such as chips, from the plate element using a rotating cutting device comprising a plurality of tooth elements configured to rotate about an axis of rotation. The method further comprises counteracting, such as preventing, displacement of the plate element away from the support element during the formation of the at least one groove, wherein the counteracting, such as preventing, includes arranging at least a portion of the plate element between a barrier element and the support element.The disclosure relates generally to methods and systems for forming grooves in a plate element, as well as to various plates that have at least one groove.

[0006] Publication CH 719 125 A1 discloses a room cladding element, in particular a parquet plank element, which has a carrier board and a top layer attached to a top surface of the carrier board. A plurality of parallel, regularly spaced first slots are arranged on the top surface of the carrier board. On a bottom surface of the carrier board facing away from the top surface, a plurality of regularly spaced second slots are arranged parallel to the first slots, with each second slot located between two first slots when viewed from the surface of the carrier board.

[0007] German patent application DE 28 15 714 A1 discloses plastic-coated panels, in particular particleboard, which are bent or curved by creating two or more parallel grooves on the side of the panel facing away from the intended convex curves; the grooves are filled with an adhesive; the panel is bent so sharply that the grooves (located on the concave side of the bend) are closed, i.e., the opposite edges of each groove are closed to each other, and the adhesive is allowed to set. The panel is particleboard coated on both sides with flexible plastic. Alternatively, the particleboard can also be coated or veneered with plastic on only one side. Instead of an adhesive, the grooves can also be filled with a self-adhesive polyurethane foam that hardens.

[0008] The object of the invention is to provide a cladding panel with improved performance characteristics.

[0009] To solve the problem, a cladding panel with the features of the independent claim directed to such a cladding panel is proposed. In particular, a cladding panel with two flat sides facing away from each other is proposed, wherein grooves are formed on both flat sides, and wherein the grooves on one flat side have shallower depths than the grooves on the other flat side. The grooves on the two flat sides of the cladding panel can give the cladding panel a specific appearance and / or specific acoustic properties, as well as a certain degree of flexibility, so that the cladding panel can also be used to clad curved surfaces.

[0010] Due to the different groove depths on the two flat sides of the cladding panel, the groove width of the grooves with the smaller groove depth on this flat side can be largely independent of the chosen bending radius around which the cladding panel is bent, and, unlike the groove width on the other flat side, can remain almost constant.

[0011] Since the grooves on the flat side acting as the visible side of the cladding panel have smaller groove depths than the grooves on the flat side acting as the back side of the cladding panel, curved surfaces can be clad with the cladding panel without the groove width on the visible side changing significantly due to the bending of the cladding panel.

[0012] The visible side of the cladding panel can be the flat side that faces away from the surface being clad when the panel is installed in its used position. The reverse side can be the flat side of the cladding panel that faces away from the visible side.

[0013] In relation to grooves on cladding panels that are adjacent to the curved or bent cladding panel and are themselves not curved or bent, the groove widths of the grooves on the curved cladding panel do not deviate significantly from the groove widths of the grooves on the adjacent, uncurved or less curved cladding panels.

[0014] According to the invention, the grooves on the flat side serving as the visible side of the cladding panel have groove depths that are less than half the panel thickness or at most as large as half the panel thickness of the cladding panel.

[0015] It is particularly advantageous if the grooves on the flat side of the cladding panel, which serves as the visible side, have groove depths that are less than half the thickness of the cladding panel. In this case, any bending of the cladding panel to cover curved surfaces has a particularly minimal effect on the groove widths on the flat side of the cladding panel that serves as the visible side.

[0016] In this way, the cladding panel according to the invention enables the cladding of curved, bent and also flat surfaces, with a uniform groove pattern across the entire cladding surface.

[0017] According to the invention, the cladding panel is flexible due to the grooves on its flat sides, namely about a bending axis oriented parallel to the grooves. Preferably, the grooves on the respective flat sides are aligned parallel to each other. According to the invention, the grooves on one flat side are aligned parallel to the grooves on the other flat side.

[0018] For ease of handling and performance of the cladding panel, it is further advantageous if the grooves on each flat side connect two opposing edges of that side. This ensures that the grooves extend along the entire length of the flat side as measured along the grooves. This allows the cladding panel to be easily bent into shape, enabling it to cover curved surfaces.

[0019] In one embodiment of the cladding panel, the grooves on one flat side are offset from the grooves on the other flat side when viewed in cross-section. In another embodiment of the cladding panel, the grooves on one flat side are arranged coaxially, i.e., without offset, from the grooves on the other flat side.

[0020] The grooves on the two flat sides can overlap in the cross-section of the cladding panel. In this case, there is a cross-sectional plane that runs through the cladding panel and intersects grooves, preferably all grooves, on both the flat sides.

[0021] In another embodiment of the cladding panel, the grooves on both flat sides are arranged with their respective groove bases in a common cross-sectional plane of the cladding panel. This common cross-sectional plane is preferably spaced apart from a parallel longitudinal center plane of the cladding panel in the direction of the groove depths. In this case, the sum of the groove depths on one flat side and the groove depths on the other flat side corresponds to the thickness of the cladding panel, with the groove depths on one flat side differing from those on the other, as previously described.

[0022] In one embodiment of the cladding panel, the grooves on each flat side have a uniform groove depth. The sum of these uniform groove depths—that is, the groove depth on one flat side and the groove depth on the other flat side—can be greater than, equal to, or less than the thickness of the cladding panel as measured along the groove depths.

[0023] If the sum of the groove thicknesses equals the panel thickness, the groove bases meet in a common cross-sectional plane of the cladding panel. In this case, the grooves on one flat side should be offset from the grooves on the other flat side.

[0024] If the sum is less than the plate thickness, the grooves of one flat side are arranged with their respective groove bases in a cross-sectional plane that is spaced apart in the direction of the groove depths from a cross-sectional plane in which the grooves of the other flat side are arranged with their respective groove bases. The grooves on one flat side can be offset or coaxial with the grooves on the other flat side.

[0025] If the sum is greater than the panel thickness, the grooves on the two flat sides will overlap in the cross-section of the cladding panel, as previously mentioned. In this case, the grooves on one flat side should be offset from the grooves on the other flat side.

[0026] In one embodiment of the cladding panel, the grooves on one of the two flat sides can have a groove depth that is greater than, less than, or equal to half the thickness of the cladding panel, while the grooves on the other flat side can have a groove depth that is greater than, or less than, half the thickness of the cladding panel. Depending on the chosen groove depth on the two flat sides, a different groove pattern results in the cross-section.

[0027] Particularly when the cladding panel is to be bent around small radii, i.e., strongly, it can be advantageous to design the grooves on the flat side, which forms the back of the cladding panel, with a groove depth that is at least equal to or greater than half the thickness of the cladding panel.

[0028] In one embodiment of the cladding panel, the grooves on one flat side alternate with the grooves on the other flat side, viewed in cross-section. Between two grooves on one flat side, a groove is formed on the other flat side. The grooves on one flat side are offset from the grooves on the other flat side.

[0029] In another embodiment of the cladding panel, it can be provided that between two adjacent grooves on one flat side, more than one groove is formed on the other flat side, in particular two or three or more grooves. Specifically, it can be provided that between two grooves on the flat side of the cladding panel that serves as the visible side of the cladding panel, at least two or more grooves are formed on the flat side that serves as the back of the cladding panel.

[0030] In one embodiment of the cladding panel, the panel is single-layered. However, the cladding panel can also be constructed with at least two layers, comprising at least a visible layer and a backing layer. Constructing the cladding panel as a multi-layered panel can be advantageous in order to impart specific properties to the panel. For example, a multi-layered structure makes it possible to assign specific acoustic properties to the cladding panel, particularly damping and / or insulating properties.

[0031] In one embodiment of the cladding panel, it has at least one transverse layer positioned between the previously mentioned visible layer and the previously mentioned back layer. This transverse layer allows the cladding panel to acquire certain acoustic properties, such as the previously mentioned acoustic damping and / or sound-insulating effect.

[0032] The backing can be optimized for attaching the cladding panel to a surface. For this purpose, transverse grooves, which will be explained in more detail below, can be formed on the rear flat side of the cladding panel. These transverse grooves also allow the cladding panel to be bent around a bending axis oriented transversely to the grooves, particularly to the grooves on the front or visible flat side. The transverse grooves thus enable the cladding panel to be bent around at least one further bending axis on both flat sides, oriented transversely, preferably perpendicularly, to the aforementioned grooves. This makes the cladding panel suitable for cladding surfaces that may be curved in two or more directions.

[0033] The visible surface of the cladding panel can be designed with regard to desired optical properties and, if necessary, also with regard to acoustic properties.

[0034] The visible surface of the cladding panel can, for example, have a strip-like appearance. This strip-like appearance can be achieved through grooves on the flat side of the cladding panel, which forms the visible surface. The visible surface can be made of solid layers and / or, for example, wood-based materials, solid wood, veneer, medium-density fiberboard (MDF), and / or high-density fiberboard (HDF). Furthermore, the visible surface can have, for example, a sanded, brushed, planed, sawn, lacquered, and / or oiled finish.

[0035] In a particularly preferred embodiment of the cladding panel, the visible layer can, for example, consist of a combination of solid wood or wood-based material and veneer.

[0036] In one embodiment of the cladding panel, the backing layer can be made of solid layers and / or, for example, of wood-based material, solid wood, veneer, MDF, HDF, and / or absorber material, such as wood fiber, hemp, jute, mineral wool, poly-fleece, and / or wool. The backing layer can also have a surface finish such as sanded, brushed, planed, sawn, lacquered, and / or oiled.

[0037] The cross layer of the cladding panel can consist of, for example, wood-based material, solid wood, veneer, MDF, HDF and / or absorber material, in particular wood fiber, hemp, jute, mineral wool, poly-fleece and / or wool. The cross layer can, for example, be a single layer or at least comprise two or more layers of different types of material, in particular different types of the aforementioned materials, and / or with different layer thicknesses.

[0038] The cross layer can be heterogeneous or homogeneous. With a homogeneous structure, the cross layer can consist of only a single material in the direction of its surface area. With a heterogeneous structure, it is possible, for example, to incorporate a sequence of different materials in the direction of the cross layer's surface area. These different materials can be present in varying widths. For instance, a sequence in which the cross layer alternates between wood and absorber material is conceivable.

[0039] This method creates a cladding panel that, due to its transverse orientation and wood components, exhibits high stability and load-bearing capacity, and—due to its absorber material content—good acoustic properties. The absorber material can have an acoustically damping and / or insulating effect, thus influencing the acoustic properties of the cladding panel.

[0040] In one embodiment of the cladding panel, at least one flat side, preferably the flat side that forms the visible side of the cladding panel in the installed operating position, is flat in cross-section except for the grooves. This creates a visible side that is unprofiled except for the grooves. In another embodiment of the cladding panel, the cladding panel has a profiled flat side as the visible side. Viewed in cross-section, the visible side of the cladding panel is then profiled, meaning it does not have a uniform height. Thus, a vertically offset profile can be formed on one flat side of the cladding panel, particularly on the flat side of the cladding panel that serves as the visible side of the cladding panel in the installed operating position.

[0041] The installation of the cladding panel can be simplified if the flat side serving as the back is flat, i.e., unprofiled, except for the grooves and / or transverse grooves.

[0042] In one embodiment of the cladding panel, strips arranged between two grooves on the flat side, in particular the flat side that forms the visible side of the cladding panel, are provided with a chamfer and / or a rounding on the groove side.

[0043] The cladding panel can have a transverse joint on at least one narrow side oriented perpendicular to the flat sides. This transverse joint can be, for example, a butt joint, a tongue-and-groove joint, or a groove for a spline. The transverse joint can be used to connect the cladding panel to another cladding panel or another component.

[0044] The cladding panel can have a longitudinal joint on at least one narrow side oriented perpendicular to the flat sides. This longitudinal joint can be, for example, a butt joint, a tongue-and-groove joint, or a groove for a spline. The longitudinal joint can also be used to connect the cladding panel to another cladding panel or another component. The narrow side of the cladding panel can be the narrow side of the cladding panel that is oriented in the direction of the grooves on at least one of the two flat sides.

[0045] The cladding panel can have transverse grooves on at least one flat side, particularly on its flat side acting as the back, preferably oriented at right angles to the grooves. As already explained above, these transverse grooves can facilitate bending of the cladding panel about at least one further bending axis oriented transversely, preferably at right angles, to the grooves on the flat sides.

[0046] At least one groove in the cladding panel can have a rectangular, polygonal, or trapezoidal cross-section that tapers towards the groove base, and / or a curved, flat, or inclined groove base that slopes downwards on both sides of a longitudinal center axis of the groove in the direction of a groove depth. Furthermore, at least one groove can have a groove base with chamfers or rounded edges.

[0047] The grooves can be grouped in one or at least two groups on at least one flat side. Two groups of grooves can be spaced apart on a flat side by a distance greater than the groove spacing within one of the groups. It is also possible for at least one group of grooves to be spaced further from an edge of the cladding panel by a distance greater than the groove spacing within the group. Such a cladding panel can thus have areas on at least one of its flat sides that are free of grooves. These areas can be located between groups of grooves. The arrangement of grooves in groups can influence the appearance of the cladding panel. Furthermore, the arrangement of grooves in one or more groups allows for the definition of one or more bending regions in which the cladding panel can be preferentially bent.

[0048] In this context, it is advantageous if the groups of grooves are opposite each other on the two flat sides of the cladding panel, i.e., arranged in the same cross-sectional areas of the cladding panel.

[0049] In another embodiment of the cladding panel, the grooves are evenly distributed along at least one flat side. This allows for free selection of the area where the cladding panel is bent to cover a curved surface.

[0050] The invention is described in more detail below with reference to exemplary embodiments, but is not limited to these. Further exemplary embodiments result from combining the features of one or more claims with one another and / or from combining one or more features of the exemplary embodiments. The following are shown: Fig. 1: A side view of a single-layer cladding panel, wherein grooves are visible on a visible flat side of the cladding panel, which are evenly distributed across the visible side of the cladding panel and whose groove depth is less than the groove depth of grooves on the rear flat side of the cladding panel; Fig. 2: A side view of a single-layer cladding panel, wherein some of the grooves on the visible flat side are grouped in pairs; Fig. 3: One of the in Figure 2A three-layer cladding panel similar to the one shown, but here with a visible side profiled by strips of different heights arranged between the grooves, Fig. 4: an end-face detail view of a strip of a cladding panel arranged between two grooves, wherein the strip is chamfered on both sides, i.e., on the groove side, Fig. 5: an end-face detail view of a strip of a cladding panel arranged between two grooves, wherein the strip is rounded on both sides, i.e., on the groove side, Fig. 6: a side view of another cladding panel, wherein two groups of grooves are arranged on each of the flat sides of the cladding panel, the grooves being spaced apart from each other at a distance greater than the groove spacing within the groups, Fig. 7: a comparison with the illustrations of the Figures 1 to 6Fig. 8: Side view of a cladding panel rotated by 90 degrees to illustrate transverse grooves oriented perpendicular to the grooves on the back of the cladding panel, Fig. 9: Side view of a three-layer cladding panel having overlapping grooves in cross-section on its rear flat side and its visible flat side, wherein a groove is formed on the other flat side between two grooves on one flat side, Fig. 10: Side view of a three-layer cladding panel with grooves arranged coaxially in cross-section on both flat sides, Fig. 11: Side view of a three-layer cladding panel, wherein two grooves are formed on the rear flat side of the cladding panel between two grooves on the visible flat side, Fig. 11: Side view of a three-layer cladding panel, wherein two grooves are formed on the rear flat side of the cladding panel between two grooves on the visible flat side, Fig. 11: Side view of a three-layer cladding panel, wherein two grooves are formed on the rear flat side of the cladding panel between two grooves on the visible flat side, Fig. 11: Side view of a three-layer cladding panel, wherein two grooves are formed on the rear flat side of the cladding panel between two grooves on the visible flat side, Fig. 11: Side view of a three-layer cladding panel, rotating 90 degrees to illustrate transverse grooves oriented perpendicular to the grooves on the rear flat side of the cladding panel ... rotating 90 degrees to illustrate transverse grooves oriented on the rear flat side of the cladding panel.Fig. 11: A side view of a three-layer cladding panel, wherein the cladding panel has a homogeneous transverse layer between a visible layer and a back layer; Fig. 12: A side view of a three-layer cladding panel, wherein the cladding panel has a heterogeneous transverse layer between a visible layer and a back layer; Fig. 13: A side view of three interconnected cladding panels to illustrate the groove pattern on the visible sides of the cladding panels at different bending radii; Fig. 14: A detail view of a cladding panel with a convexly curved visible side; Fig. 15: A detail view of a cladding panel with a flat visible side; Fig. 16: A detail view of a cladding panel with a concavely curved visible side; Fig. 17: A perspective view of a single-layer cladding panel with a profiled visible side, looking at the flat rear side of the cladding panel.18: a perspective view of a three-layer cladding panel with an unprofiled, visible flat side of the cladding panel, Fig. 19: a perspective view of the in . Figure 17 single-layer cladding panel shown with a view of the profiled flat side, Fig. 20: a perspective view of the three-layer cladding panel made of Figure 18 Looking at the unprofiled, i.e., flat, visible side with respect to the strips between the grooves, Fig. 21: a top view of the rear flat side of the Figure 20 shown cladding panel, where the arrows in the illustration refer to parts of the transverse layer visible through the grooves in the rear flat side, which consist of wood, for example solid wood, and Fig. 22: a top view of the visible flat side of the in Figure 20The cladding panel shown, with the arrows in the illustration referring to parts of the transverse layer visible through the grooves in the visible flat side, which consist of absorber material and give acoustic insulating and / or damping properties to the transverse layer and thus to the entire cladding panel.

[0051] All figures show at least parts of cladding panels, each designated by the letter 1. Unless otherwise stated, the following description refers to all cladding panels shown in the figures. 1.

[0052] Each distribution plate 1 has two flat sides 2 and 3 facing away from each other, with grooves 4 and 5 formed on both flat sides 2, 3. The grooves 4 on one flat side 2 have smaller groove depths than the grooves 5 on the other flat side 3.

[0053] In the embodiments shown in the figures, the grooves 4 on the flat side 2, which serves as the visible side of the cladding panel 1, have smaller groove depths than the grooves 5 on the flat side 3, which serves as the rear side, of the respective cladding panel 1. The groove depths of the grooves 4 on the flat side 2, which serves as the visible side, are at most half the thickness of the cladding panel 1 and preferably even less than half the thickness of the cladding panel. 1.

[0054] The grooves 4 and 5 on the two flat sides 2 and 3 make each cladding panel 1 flexible and allow it to be bent around a bending axis oriented parallel to the grooves 4, 5 in order to adapt the cladding panel 1 to a curved surface that is to be covered with the cladding panel 1, if required.

[0055] The grooves 4 and 5 are aligned parallel to each other on the respective flat sides 2 and 3. Furthermore, the grooves 4 on flat side 2 are also aligned parallel to the grooves 5 on flat side 3 of the respective cladding panel 1.

[0056] The figures illustrate that the grooves 4 and 5 on the respective flat sides 2 and 3 connect opposing edges 6 and 7 of the cladding panel 1. The grooves 4 and 5 thus extend over the entire dimension of the respective flat sides 2 and 3 oriented in the direction of the grooves 4 and 5.

[0057] At the in Figure 9 In the cladding panel 1 shown, the grooves 4 on one flat side 2, viewed in cross-section of the cladding panel 1, are aligned coaxially with the grooves 5 on the other flat side 3 of the cladding panel 1 and thus have no lateral offset to the grooves 5 on the flat side 3.

[0058] In all other cladding panels shown in the figures, the grooves 4 on one flat side 2, viewed in cross-section of the respective cladding panel 1, are arranged offset from the grooves 5 on the other flat side 3.

[0059] The coaxial grooves 4 and 5 on the two flat sides 2 and 3 of the cladding plate 1, which are in Figure 9 As shown, the grooves 4 and 5 are separated from each other by the material of the cladding panel 1. Therefore, grooves 4 and 5 do not overlap in the cross-section of the cladding panel 1. This means that a cross-sectional plane can be defined for this cladding panel 1 that runs between the grooves 4 of one flat side 2 and the grooves 5 of the other flat side 3 of the cladding panel, without intersecting either groove 4 or 5.

[0060] In all other embodiments of the cladding panels 1 shown in the figures, the grooves 4 and 5 of the two flat sides 2 and 3 overlap when viewed in cross-section of the cladding panel 1. This means that in these embodiments of the cladding panel 1, a cross-sectional plane can be defined within the cladding panel 1 that intersects both the grooves 4 of one flat side 2 and the grooves 5 of the other flat side 3 of the respective cladding panel 1.

[0061] In an embodiment of the cladding panel not shown in the figures, the grooves 4 and 5 on the two flat sides 2 and 3, with their respective groove bases 8 and 9, can also be arranged in a common cross-sectional plane of the cladding panel 1. This common cross-sectional plane can be spaced apart from a parallel longitudinal center plane of the cladding panel 1 in the direction of the groove depths. This arrangement of the common cross-sectional plane is caused by the different groove depths that the grooves 4 on one flat side 2 and the grooves 5 on the other flat side 3 of the cladding panel 1 have.

[0062] The cladding panels 1 shown in the figures, which are flat on their flat side 2 that functions as the visible side in the service position, i.e., they do not have a profile, as is the case with the cladding panels 1 according to the Figures 3 , 17or if 19 is the case, the grooves 4 and 5 on the respective flat side 2, 3 each have a uniform groove depth.

[0063] Depending on the design of the cladding panel 1, the sum of the uniform groove depths can be greater, equal to or less than the thickness of the cladding panel 1 as measured in the direction of the groove depths.

[0064] In the case of a cladding panel 1, such as that found in Figure 1 or also in Figure 2 As shown, and where the grooves 4 on one flat side 2 overlap with the grooves 5 on the other flat side 3 in the cross-section of the cladding panel 1, the sum of the uniform groove depths is greater than the thickness of the cladding panel 1 measurable in the direction of the groove depths.

[0065] In all the cladding panels 1 shown in the figures, the grooves 5 on the flat side 3, which acts as the back, have a groove depth greater than half the thickness of the cladding panel 1. The grooves 4 on the other flat side 2 have a groove depth less than half the thickness of the cladding panel 1. Thus, the grooves 4 can overlap with the grooves 5, but have a shallower groove depth than the grooves 5 on the flat side 3 of the cladding panel 1, which acts as the back.

[0066] The in Figure 10 The cladding panel 1 shown has the special feature that between two grooves 4 arranged on the visible flat side 2, two grooves 5 are arranged on the rear flat side 3.

[0067] In all other embodiments of cladding panels 1 shown in the figures, at least one groove 5 or 4 is formed on the other flat side 3 or 2 between two adjacent grooves 4 or 5 on one flat side 2 or 3.

[0068] The in the Figures 1, 2 , 6, 7 The cladding panels 1 shown in Figures 13-16 are single-layered. The remaining cladding panels 1 shown in the figures are multi-layered, namely three-layered, and have a visible layer 21, a back layer 22, and a transverse layer 10 between the visible layer 21 and the back layer 22.

[0069] The visible layer 21 has a strip-like appearance due to the grooves 4 on the visible flat side 2. The visible layers 21 shown in the figures are also solid. The visible layer 21 can be made of wood-based material, solid wood, veneer, MDF and / or HDF and / or have a sanded, brushed, planed, sawn, lacquered and / or oiled surface. Of course, it is also possible to manufacture the visible layer 21 from a mixture of the aforementioned materials.

[0070] The backing layer 22 of the cladding panel 1 shown in the figures is also made of solid layers. The backing layer 22 can consist of wood-based material, solid wood, veneer, MDF, HDF and / or absorber material, for example, wood fiber, hemp, jute, mineral wool, poly-fleece and / or wool. The backing layer 22 can also have a sanded, brushed, planed, sawn, lacquered and / or oiled surface.

[0071] The transverse layer 10 between the visible layer 21 and the back layer 22 can consist of a wood-based material, solid wood, MDF, HDF and / or absorber material, in particular wood fiber, hemp, jute, mineral wool, poly-fleece and / or wool.

[0072] At the in Figure 11 The cladding panel 1 shown has a transverse layer made of a single material or a mixture of materials, but with a homogeneous structure. In the case of the Figure 12 The cladding panel 1 shown has a heterogeneous cross-layer 10. This means that the cross-layer 10 comprises sections and / or elements made of different types of material. This is indicated by the different hatching patterns of the cross-layer 10 in Figure 12 hinted at.

[0073] In the case of a multi-layered structure of the transverse layer 10, i.e. a layered structure which comprises two or more layers in the direction of the plate thickness, the transverse layer 10 can have two or more layers made of different types of material, in particular of different types of material mentioned above, and / or with different layer thicknesses.

[0074] As mentioned previously, the ones in the Figures 3 , 17 and 19 The cladding panels 1 shown are profiled on the flat side 2, which serves as the visible side, in addition to the grooves 4. The other cladding panels 1 shown in the figures are flat on the flat side 2, which serves as the visible side, except for the grooves 4, either in cross-section or when viewed from the side.

[0075] The detailed representations of the Figures 4 and 5 two different strips of a flat side 2 show each of their longitudinal sides facing the grooves 4 with a chamfer 11 - see Figure 4 - or rounded to 12 - see Figure 5 - are provided.

[0076] The in the Figures 3 , 17 and 19 The cladding panels 1 shown have a vertically offset strip profile 13 on their flat side 2, which serves as the visible side. The strip profile 13 is formed by strips of different thicknesses and constitutes the visible layer 21 of the cladding panel. 1.

[0077] All cladding panels 1 can have a transverse joint 15 on their narrow sides 14, which are oriented transversely to the flat sides 2 and 3. The transverse joint 15 serves to connect the cladding panel 1 to another cladding panel 1 or to another component. The transverse joint 15 can, for example, be designed as a butt joint, a tongue-and-groove joint, or as a groove for a spline.

[0078] The cladding panels 1 have a longitudinal joint 17 on at least one longitudinal narrow side 16, which is oriented transversely to the flat sides 2 and 3 and also transversely to the previously mentioned narrow side 14. The longitudinal joint 17 serves to connect the cladding panel 1 to another cladding panel 1 or another component via its longitudinal narrow side 16. The longitudinal joint 17 can be designed, for example, as a butt joint, a tongue-and-groove joint, or as a groove for a spline.

[0079] The narrow side 14 can be a narrow side of the respective cladding panel 1, which is oriented transversely or perpendicularly to an orientation of the grooves 4 and 5 of the cladding panel 1.

[0080] The longitudinal narrow side 16 can be a narrow side of the cladding panel 1, which is oriented parallel to the course of the grooves 4 and 5 on the flat sides 2 and 3 of the cladding panel 1.

[0081] The in Figure 7The cladding panel 1 shown has transverse grooves 18 on its rear flat side 3, oriented transversely, namely perpendicularly to the grooves 4 and 5. These transverse grooves 18 facilitate bending of the cladding panel 1 about at least one further bending axis, oriented transversely, here perpendicularly, to the grooves 4 and 5 on the flat sides 2 and 3.

[0082] The grooves 4 and 5 shown in the figures have a rectangular cross-section when the cladding panel 1 is undeformed. In other embodiments of the cladding panel 1, the grooves 4 and 5 can also have other cross-sectional shapes, for example, a rectangular or polygonal cross-section, a cross-section that tapers towards the base of the groove 8, 9, or a trapezoidal cross-section.

[0083] The grooves 4 and 5 of the cladding panels 1 shown in the figures each have a groove base 8 or 9, respectively, which is flat. In embodiments of the cladding panel 1 not shown in the figures, the respective groove base 8, 9 can be curved, inclined, or slope downwards on both sides of a longitudinal center axis of the respective groove 4, 5 in the direction of a groove depth. The respective groove base 8, 9 can also be connected to the groove flanks of the groove 4, 5 by chamfers and / or radii.

[0084] Figure 6Figure 1 shows an embodiment of a cladding panel 1 in which the grooves 4 on one flat side 2 and the grooves 5 on the other flat side 3 are each grouped into two groups 19 and 20. The two groups 19 and 20 of grooves 4 and 5, respectively, are spaced apart from each other by a distance greater than the groove spacing between the grooves 4 and 5 within one of the groups 19 and 20. The groups 19 and 20 can define areas in which the cladding panel 1 can be bent to cover a curved surface. In this context, it is advantageous if the groups 19 and 20 of grooves 4 and 5 on the two flat sides 2 and 3 are opposite each other, as shown in Figure 1. Figure 6 shown, are arranged in the same cross-sectional areas of the cladding panel 1.

[0085] In another embodiment of the cladding panel 1, not shown in the figures, at least one group of grooves may be provided which has a distance to an edge of the cladding panel 1 that is greater than a groove spacing of the grooves within the respective group.

[0086] In the remaining cladding panels 1 shown in the figures, the grooves 4 and 5 are evenly distributed on the two flat sides 2 and 3. The grooves 4 and 5 of these cladding panels 1 thus form a single group of grooves 4 or 5 on the respective flat side 2 or 3. These cladding panels 1 can therefore be used particularly easily for cladding strongly curved surfaces, for example, surfaces that are at least partially cylindrical.

[0087] The effect of the different groove depths of the grooves 4 on the visible flat side 2 and the grooves 5 on the rear flat side 3 of the cladding panels 1 is shown in the illustrations in the Figures 13-16 evident.

[0088] Figure 13 shows three cladding panels 1 which are connected to each other via their longitudinal narrow sides 17. Figure 14 shows the one with the topmost rectangle in Figure 13 Highlighted detail shown in enlarged view. In Figure 14 Is the cladding panel 1 compared to the illustration from Figure 13 Shown with a more pronounced curve. Figure 14 This is intended to illustrate the effect of the different groove depths of grooves 4 and 5 on the two flat sides 2 and 3 of the cladding panel 1 with regard to constant or at least nearly constant groove widths even when the cladding panel 1 is strongly bent.

[0089] Figure 14This illustrates that the grooves 4 on the flat side 2 of the cladding panel 1, which serves as the visible side, have a groove width that is different from that of a flat cladding panel 1, despite the convex curvature of the cladding panel 1 in relation to the flat side 2. Figure 15 The result shown hardly changes. This is because the grooves 5 on the flat side 3 have a greater groove depth than the grooves 4 on the flat side 2, which serves as the visible side. Furthermore, this effect is favored by the fact that the grooves 4 on the flat side 2 have a groove depth that is less than half the thickness of the cladding panel 1.

[0090] Figure 15 shows a section of a cladding panel 1, which is flat. A comparison of the Figures 14 and 15 shows that the groove width of the grooves 4 on the flat side 2 of the cladding panel 1, which serves as the visible side, is determined by the convex curvature according to Figure 14is virtually unchanged compared to the uncurved cladding panel 1.

[0091] Figure 16 Figure 1 shows a section of a cladding panel 1 with a concave curve relative to the flat side 2, which serves as the visible side. Here, too, it is clearly visible that the groove width of the visible grooves 4 hardly changes, while the groove width of the rear grooves 5 on the flat side 3 of the cladding panel 1 changes due to the curvature of the cladding panel 1 compared to the one shown in Figure 2. Figure 15 The flat initial position shown has been significantly enlarged. The grooves 4 formed on the visible flat side 2 have a size that is significantly larger compared to Figure 15 Due to their shallower groove depth, the groove width remains almost unchanged. Reference symbol list

[0092] 1. Cladding panel 2. Flat side, visible side 3. Flat side, back 4. Groove at 2 5. Groove at 3 6. Edge 7. Edge 8. Groove base of 4 9. Groove base of 5 10. Transverse layer 11. Chamfer 12. Rounding 13. Strip profile 14. Narrow side 15. Transverse joint 16. Longitudinal narrow side 17. Longitudinal joint 18. Transverse groove 19. Group of grooves 20. Group of grooves 21. Visible layer 22. Back layer

Claims

1. Cladding panel (1) having two flat sides (2, 3) facing away from each other, wherein grooves (4, 5) are formed on both flat sides (2, 3), and wherein the grooves (4) on one flat side (2) have smaller groove depths than the grooves (5) on the other flat side (3), wherein the grooves (4, 5) on one flat side (2, 3) are aligned parallel to the grooves (5, 4) on the other flat side (3, 2), and wherein the cladding panel (1) is flexible by means of the grooves (4, 5) on the flat sides (2, 3) about a bending axis oriented parallel to the grooves (4, 5), characterized in that the grooves (4) on the flat side (2) acting as the visible side of the cladding panel (1) have smaller groove depths than the grooves (5) on the flat side (3) acting as the rear side of the cladding panel (1), and in that the grooves (4) on the flat side (2) acting as the visible side of the cladding panel (1) have groove depths that are less than half the panel thickness or at most as large as half the panel thickness of the cladding panel (1).

2. Cladding panel (1) according to the preceding claim, wherein the grooves (4, 5) on the respective flat sides (2, 3) are aligned parallel to each other.

3. Cladding panel (1) according to one of the preceding claims, wherein the grooves (4, 5) on the respective flat side (2, 3) extend over the entire dimension of the flat side (2, 3) oriented in the direction of the grooves (4, 5) and / or connect two opposite edges (6, 7) of the cladding panel (1) to each other.

4. Cladding panel (1) according to one of the preceding claims, wherein the grooves (4, 5) on the one flat side (2, 3) are arranged in the cross-section of the cladding panel (1) offset from the grooves (5, 4) on the other flat side (3, 2), or wherein the grooves (4, 5) on the one flat side (2, 3) in the cross-section of the cladding panel (1) are coaxial, i.e. without offset, to the grooves (5, 4) on the other flat side (3, 2).

5. Cladding panel (1) according to one of the preceding claims, wherein the grooves (4, 5) on the two flat sides (2, 3) intersect in the cross-section of the cladding panel (1), or wherein the grooves (4, 5) on the two flat sides (2, 3) are arranged with their respective groove bases (8, 9) in a common cross-sectional plane of the cladding panel (1), preferably wherein the common cross-sectional plane is spaced apart from a longitudinal center plane of the cladding panel (1) parallel thereto in the direction of the groove depths.

6. Cladding panel (1) according to one of the preceding claims, wherein the grooves (4, 5) on the respective flat side (2, 3) have a uniform groove depth and the sum of the respective uniform groove depths is greater than, equal to, or less than a panel thickness of the cladding panel (1) measurable in the direction of the groove depths.

7. Cladding panel (1) according to one of the preceding claims, wherein the grooves (4, 5) on one flat side (2, 3) of the two flat sides (2, 3) have a groove depth that is greater than, less than or equal to half the panel thickness of the cladding panel (1), while the grooves (4, 5) on the other flat side (2, 3) have a groove depth that is greater than or less than half the panel thickness of the cladding panel (1).

8. Cladding panel (1) according to one of the preceding claims, wherein between two adjacent grooves (4, 5) on one flat side (2, 3) at least one groove (5, 4) is formed on the other flat side (3, 2), in particular two or three or more grooves (5, 4).

9. Cladding panel (1) according to one of the preceding claims, wherein the cladding panel (1) is single-layered or wherein the cladding panel (1) is at least structured in a double-layered manner and has at least one visible layer (21) and one rear layer (22).

10. Cladding panel (1) according to claim 9, wherein the cladding panel (1) has at least one cross layer (10) arranged between the visible layer (21) and the rear layer (22).

11. Cladding panel (1) according to claim 9 or 10, wherein the visible layer (21) has a strip appearance and / or is solid-layered and / or made of wood-based material, solid wood, veneer, medium-density fiberboard (MDF) and / or high-density fiberboard (HDF) and / or with a sanded, brushed, planed, rough-sawn, lacquered, and / or oiled surface.

12. Cladding panel (1) according to one of claims 9 to 11, wherein the rear layer (22) is solid-layered and / or made of wood-based material, solid wood, veneer, medium-density fiberboard (MDF), high-density fiberboard (HDF) and / or absorber material, for example made of soft wood fiber, hemp, jute, mineral wool, poly-fleece and / or wool, and / or with a sanded, brushed, planed, rough-sawn, lacquered and / or oiled surface.

13. Cladding panel (1) according to one of claims 10 to 12, wherein the cross layer (10) consists of wood-based material, solid wood, medium-density fiberboard (MDF), high-density fiberboard (HDF) and / or absorber material, in particular soft wood fiber, hemp, jute, mineral wool, poly-fleece and / or wool, and / or wherein the cross layer (10) is formed in a single layer or has at least two or more layers of different types of material, in particular of different types of the aforementioned materials, and / or with different layer thicknesses.

14. Cladding panel (1) according to one of claims 10 to 13, wherein the cross layer (10) has a heterogeneous or homogeneous structure.

15. Cladding panel (1) according to one of the preceding claims, wherein at least one flat side (2, 3), in particular the flat side (2) of the cladding panel (1) acting as the visible side, is flat in cross-section except for the grooves (4) or is profiled in addition to the grooves (4).

16. Cladding panel (1) according to one of the preceding claims, wherein strips of the flat side (2, 3) arranged between two grooves (4, 5) are provided with a chamfer (11) and / or a rounding (12) on the groove side, and / or wherein a height-offset strip profile (13) is formed on a flat side (2, 3), in particular on the visible side of the cladding panel (1).

17. Cladding panel (1) according to one of the preceding claims, wherein the cladding panel (1) has a transverse joint (15) on at least one narrow side (14) oriented transversely to the flat sides (2, 3), preferably wherein the transverse joint (15) is designed as a butt joint, as a tongue-and-groove connection, or as a groove for an external tongue, and / or wherein the cladding panel (1) has a longitudinal joint (17) on at least one longitudinal narrow side (16) oriented transversely to the flat sides (2, 3), preferably wherein the longitudinal joint (17) is designed as a butt joint, as a tongue-and-groove joint or as a groove for an external tongue.

18. Cladding panel (1) according to one of the preceding claims, wherein the cladding panel (1) has transverse grooves (18) oriented transversely, preferably at right angles, to the grooves (4, 5) on at least one flat side (2, 3), in particular on its rear side (3).

19. Cladding panel (1) according to one of the preceding claims, wherein at least one groove (4, 5) has a rectangular or polygonal or trapezoidal cross-section tapering towards the groove base (8, 9) and / or a curved or flat or inclined groove base (8, 9) or a groove base (8, 9) sloping down on both sides of a longitudinal central axis in the direction of a groove depth, and / or wherein at least one groove (2, 3) has a groove base (8, 9) provided with chamfers and / or rounded portions.

20. Cladding panel (1) according to one of the preceding claims, wherein the grooves (4, 5) are grouped on at least one flat side (2, 3) in one or at least two groups (19, 20), in particular wherein two groups (19, 20) are spaced apart from each other by a distance that is greater than a groove spacing within one of the groups (19, 20) and / or wherein at least one group (19, 20) is spaced apart from an edge of the cladding panel (1) by a distance that is greater than a groove spacing within the group (19, 20).

21. Cladding panel (1) according to one of the preceding claims, wherein the grooves (4, 5) are arranged on at least one flat side (2, 3) evenly distributed along the flat side (2, 3).

Images