Press tool and manufacturing method of press plate

Abstract

To provide a press tool having a press surface, and to provide a manufacturing method of the press tool.SOLUTION: The invention relates to a press tool for manufacturing a workpiece, which includes a press surface (2). The press tool includes: a base structure (10); and at least two ceramic layers (11, 12) which are disposed on a surface (31) to form the press surface (2). The first ceramic layer (11) of the ceramic layers (11, 12) has a first gloss level. The second ceramic layer (12) has a second gross level different from the first gloss level of the first ceramic layer (11).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a press tool having a press surface and a method for manufacturing a press tool. [Background technology]

[0002] Press tools in the form of press plates, endless belts, embossing rollers, etc. are used, in particular in the woodworking industry, for example for the production of furniture, material boards such as laminates or panels, i.e. workpieces in general, which are pressed against the press surface of the press tool to give the workpiece a surface corresponding to the press surface.

[0003] Material boards, such as wood-based material boards, are required in the furniture industry and for interior finishing, such as laminate flooring, and have a core made of MDF (medium density fiberboard) or HDF (high density fiberboard), on at least one side of which various material layers, such as (visual) decorative layers or protective layers (overlay layers), are formed.

[0004] To prevent warping of the manufactured boards, such boards usually have the same number of layers on both sides. To bond the individual layers (core, layers, etc.) of the board, they are pressed together in a press using special press tools, in particular press plates or endless belts. This also involves imprinting the boards' surfaces. Typically, a hot press is used to bond the various layers of thermosetting resin, e.g., melamine resin, to the surface of the boards' core by fusing the plastic material under the action of heat.

[0005] In this case, the decorative layer determines the pattern and color of the material board, while the desired surface structure can be achieved by using appropriate press tools. For example, wood or tile decorations can be printed on the decorative layer (decorative paper), or the decorative layer can be artistically designed with patterns and colors depending on the intended use. In this case, an overlay layer printed on the top or bottom surface can also be used.

[0006] To improve the lifelike reproduction, the press tool is provided with a surface structure that is designed to perfectly match the decorative layer, particularly in the case of material boards with wood, tile or natural stone decoration, and that forms a negative image of the desired surface structure. Thus, the press tool can be provided with a 3D profile (depth structure) that imitates, for example, the veins of a wooden surface, to give, for example, the appearance of a wooden surface to the decorative layer of the material board.

[0007] To achieve a consistent surface imprinting of the material board or laminate, i.e., the exact match required between the structure of the decorative layer and the press surface of the laminate, high quality standards are required in the production of the press tool. In particular, press plates or endless belts are used as upper and lower dies in short-cycle presses covered with press plates and, preferably, press pads, or, in the case of endless belts, in double-belt presses, to simultaneously imprint and heat the material board. As a result, the thermosetting resin of the decorative layer and / or overlay layer of the material board is first melted, introducing a surface structure corresponding to the structure of the press surface of the press tool into the outer material layer, and subsequent hardening bonds the structured material layer to the core of the material board.

[0008] Patent Document 1 discloses a method for processing a structured press surface for an embossing mold. A first chrome layer is applied over the entire surface, and at least one additional chrome layer is applied in predetermined areas. The two chrome layers have different gloss levels. This press surface allows the production of workpieces formed as blanks with structured surfaces with different gloss levels. The production of this press tool is relatively environmentally harmful due to the use of chrome layers and multiple masking and cleaning steps.

[0009] Patent Document 2 discloses a method for producing a flat press surface for producing decorative laminates from resin-impregnated paper. For this purpose, the flat press surface is given a desired finish, impurities are removed from the flat surface, and the flat surface is coated with hafnium diboride, molybdenum diboride, tantalum diboride, titanium diboride, tungsten diboride, vanadium diboride, zirconium diboride, or a mixture of these substances to a Vickers hardness of at least 2000 HV using a surface magnetron sputtering coating device, by moving the flat surface and the sputtering head of the surface magnetron sputtering coating device relative to each other at a scanning speed sufficient to generate a thermal gradient of 27.78°C or less in the flat press surface. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] International Publication No. 2009 / 062488(A2) [Patent Document 2] U.S. Patent No. 6,190,514(B1) Summary of the Invention [Problem to be solved by the invention]

[0011] SUMMARY OF THE INVENTION It is an object of the present invention to provide a press tool having a press surface with different gloss levels in specific areas, which is relatively environmentally friendly to manufacture. Furthermore, a method for manufacturing press tools is presented that ensures easier reproducibility at lower cost.

[0012] Furthermore, a press tool is provided for producing workpieces, in particular material boards, with different surface structures, for example coarse and fine structures, and with any degree of detail and quality.

[0013] Other objects of the present invention will become apparent from the disclosure of this application. [Means for solving the problem]

[0014] The above problem is solved by a press tool for manufacturing a workpiece, which has a press surface, a base structure, and at least two ceramic layers arranged on top of each other to form the press surface, one of which is a full ceramic layer having a certain glossiness, and the other of which is a partial ceramic layer having another glossiness different from the glossiness of the full ceramic layer.

[0015] The press tool according to the invention is, for example, an endless belt or an embossing roller. Preferably, the press tool according to the invention is a press plate.

[0016] The pressing surface may be smooth, for example, but may also be designed as a structured pressing surface. In particular, the pressing surface may have a structure consisting of bumps and depressions, the base structure may have a structured surface corresponding to the structure of the pressing surface, or the pressing surface may deviate from its three-dimensional shape by applying further layers, in particular ceramic layers.

[0017] Another aspect of the present invention is a method for manufacturing a press tool according to the present invention, comprising the steps of: providing a support structure for the base structure; applying at least two base structure layers to a support structure to form a base structure; creating a structured surface on a support structure; applying a first ceramic layer to a surface of the base structure; applying a second ceramic layer onto the structured surface and / or the applied first ceramic layer.

[0018] Thus, according to a variant, the press tool according to the invention can comprise a base structure having a correspondingly structured surface, which is optionally formed as a structured press surface, as is known, for example, from DE 199 02 14 200 A1, which comprises a number of partial metal layers arranged one on top of the other and which create the surface of the base structure, as is known, for example, from DE 199 02 14 200 A1, cited above as an example.

[0019] However, in order to obtain a relatively hard pressing surface, according to the present invention, this surface is coated with a ceramic layer rather than a chromium layer. The ceramic can likewise be designed to be relatively hard, for example, having a Vickers hardness of at least 2000 HV. Suitable ceramic materials for the ceramic layer are, for example, hafnium diboride, molybdenum diboride, tantalum diboride, titanium diboride, tungsten diboride, vanadium diboride, zirconium diboride, or mixtures of these ceramic materials. The application or coating of a ceramic layer is significantly more environmentally friendly than the application or coating of a chromium layer.

[0020] Furthermore, the press tool according to the present invention can include at least two ceramic layers arranged on top of one another, preferably exactly two ceramic layers arranged on top of one another. One ceramic layer can be a partial ceramic layer, and the other ceramic layer can be a full ceramic layer. According to the present invention, the glossiness of the full ceramic layer can be different from that of the partial ceramic layer, so that the press surface has different glossiness in different areas, and thus the surface of the workpiece produced by the press plate can also have different glossiness corresponding to each area. As a result, the quality of the workpiece produced by pressing with the press surface can be improved. The workpiece can be, for example, a material board, particularly a laminate or panel.

[0021] In particular, it is also possible to relatively easily remove a worn or damaged ceramic layer from the base structure in order to apply a new ceramic layer to the base structure, thereby allowing for relatively cost-effective repair of worn or damaged press tools.

[0022] The application of the ceramic layer can be carried out, for example, using a surface magnetron sputtering coating device.

[0023] The thickness of both ceramic layers is preferably in the range of 1 μm to 2 μm.

[0024] To achieve different gloss levels for the full ceramic layer and the partial ceramic layer, the thickness of the full ceramic layer is preferably different from the thickness of the partial ceramic layer. That is, the gloss level of each ceramic layer can be adjusted by their thickness. In this case, both ceramic layers preferably consist of the same ceramic material, which can have a positive effect on the manufacturing costs of the press tool according to the present invention. When manufacturing a press plate, the required thickness of the ceramic layer can be achieved, for example, by appropriately controlling a surface magnetron sputtering coating device.

[0025] The glossiness of the two ceramic layers can also be adjusted by using different ceramic materials for the partial and full ceramic layers. Therefore, in a variant of the press plate according to the invention, the ceramic materials of the two ceramic layers can be different in order to obtain different glossinesses for the full ceramic layer and the partial ceramic layer. In this case, the thickness of the full ceramic layer is, in particular, equal to the thickness of the partial ceramic layer.

[0026] Preferably, the partial ceramic layer is arranged between the full ceramic layer and the surface of the base structure. Applying a partial mask to the surface of the base structure; applying a ceramic layer to the masked surface in areas not covered by the mask; removing the mask so that the partial ceramic layer is disposed on the structured surface; It can be produced by applying a complete ceramic layer to a partial ceramic layer.

[0027] However, partial ceramic layers can also be produced, for example, by appropriately controlling a surface magnetron sputtering coating device.

[0028] This modification of the press tool allows for a relatively smooth press surface to be produced relatively easily, since a full ceramic layer is applied over the partial ceramic layer. However, the full ceramic layer must be such that it does not completely cover the glossiness of the underlying partial ceramic layer. In particular, the full ceramic layer is thinner than the partial ceramic layer. That is, the thickness of the full ceramic layer is less than the thickness of the partial ceramic layer.

[0029] However, the press tool according to the invention can also be designed so that a full ceramic layer is arranged between the partial ceramic layer and the structured surface of the base structure, i.e. so that the partial ceramic layer is applied onto the full ceramic layer. A ceramic layer is applied to the entire surface of the base structure, A partial mask is applied to the entire ceramic layer, applying a ceramic layer to the masked full ceramic layer in the areas not covered by the mask; The mask can be removed to leave a partial ceramic layer disposed on the full ceramic layer.

[0030] However, partial ceramic layers can also be produced, for example, by suitable control of a surface magnetron sputtering coating device.

[0031] To obtain a predetermined gloss level for each ceramic layer, the gloss level of the partial and full ceramic layers can also be achieved by post-treatment of the corresponding applied ceramic layers, which can include, for example, polishing or laser treatment of the corresponding ceramic layers.

[0032] According to an embodiment of the press tool according to the invention, the surface of the base structure can have different gloss levels in different regions, in particular different gloss levels between the full ceramic layer and the partial ceramic layer. The adjustment of different gloss levels on the surface of the base structure can be achieved, for example, by using a laser or, in the case of a base structure consisting of several layers arranged on top of one another, is known from WO 2009 / 062488 A2.

[0033] According to the invention, a press tool can be used to produce workpieces, in particular blanks or laminate flooring panels for the furniture industry, with the press tool having a pressing surface that is in direct contact with and faces the blank to be pressed when the blank is pressed in a press.

[0034] The press tool has a support structure with a surface. This surface may be flat or three-dimensional. The surface may be made of a metal, such as chromium, copper, stainless steel, nickel, tin, or a metal alloy. A ceramic layer forming the press surface is disposed on the surface. The first ceramic layer has a first glossiness, and the second ceramic layer has a second glossiness. In this case, the glossiness can be determined by the material properties of the press surface, the layer structure, the surface structure of one or both ceramic layers, or the surface of the underlying base structure. The first glossiness of the first ceramic layer is different from the second glossiness. This allows for the creation of a particularly durable surface, which can nevertheless be designed to realistically mimic the appearance of real objects, particularly wood.

[0035] Preferably, the press tool is a press plate for producing material boards, which are used in the furniture industry or laminate flooring panels. The advantage of using a press plate is that it can be used with existing press equipment in the furniture or flooring industry.

[0036] In another embodiment, the basic structure of the press tool can have a support structure made of metal, in particular stainless steel, which ensures an even distribution of the pressing pressure on the material board being pressed and is wear-resistant.

[0037] Preferably, the press surface has a structure consisting of ridges and valleys, and the base structure can have a structured surface provided on a support structure, with at least two base structure layers, particularly made of metal, arranged at least partially on top of each other, creating the structured surface of the base structure. These base structure layers can be applied flatly or in a three-dimensional form by additive manufacturing methods. Additive manufacturing methods can be, for example, inkjet printing, 3D printing, sintering, lithography, lacquering, UV-curable ink, or acrylate printing. A particular advantage here is that cheaper materials and faster, less precise application methods can be used for the intermediate layers of the base structure layers. This allows for a more cost-effective production of press surfaces with high surface quality.

[0038] Furthermore, it may be useful to apply the first or second ceramic layer only partially to the structured surface of the base structure to form a relief layer structure of the structured surface, which allows for an even finer structuring of the relief layer structure while at the same time increasing the durability of the ceramic layer and / or achieving special visual effects.

[0039] Furthermore, the first and second ceramic layers can each be applied only partially to the structured surface of the base structure, which allows for an even finer structuring of the relief layer structure while increasing the durability of the ceramic layer and / or achieving special visual effects, such as different gloss or mattness in the partially applied areas.

[0040] In a further development, a second ceramic layer can be at least partially disposed on the first ceramic layer, resulting in regions with different surface properties and structures, which can also contribute to the formation of a relief layer structure.

[0041] Preferably, the first ceramic layer or the second ceramic layer can be processed using a laser at least in the laser processing area, which can cause changes in gloss, matteness, and structure, or cuts in the layer located on the pressing surface.

[0042] An opening can be provided in the second ceramic layer that extends down to the first ceramic layer when viewed in the direction of the base structure, so that when the pressing surface is observed, at least two areas with different appearances or different structures are produced.

[0043] Preferably, the openings are cuts made by subsequent processing of the applied second ceramic layer. Possible processing steps here include milling, laser irradiation, masking, masking with UV-curable paint, removal or etching or cracking with alkali or acid. For example, a sodium hydroxide solution containing hydrogen peroxide can be used for removal. These cuts allow for full-surface coating, making the underlying layer visible or creating a visual effect.

[0044] It may further be useful if the subsequent processing is laser processing, the advantage of which is that laser processing allows very precise and fine processing even deep in layers.

[0045] In another possible embodiment of the present invention, at least one of the metal layers arranged on the press side of the base structure can be a nickel layer or a nickel-containing metal layer. A first ceramic layer and / or a second ceramic layer can be arranged on the press side. An additional metal layer, nickel layer, or nickel-containing metal layer can be arranged between the first and second ceramic layers. These metal layers can provide another layer that functions as a bonding layer.

[0046] In another possible embodiment, the structured surface of the base structure is at least partially produced with a three-dimensional relief layer structure by additive manufacturing methods. Additive manufacturing methods can be, for example, inkjet printing, 3D printing, sintering, lithography, lacquering, printing with UV-curable inks or acrylates. Such manufacturing methods make it possible to realize small batch sizes and individual structure requirements in the furniture industry.

[0047] Alternatively, the structured surface of the base structure can be produced at least partially in three dimensions using electrochemical, mechanical, or laser processing methods. For example, masking and etching processes known from the prior art or electrochemical chromium plating processes can be used. Here, proven methods can be used in press tools with the improvements according to the invention, thereby increasing the versatility of applications.

[0048] The second ceramic layer can optionally cover the entire structured surface of the base structure (10) and preferably has a thickness of 0.001 mm to 2 mm, while the first ceramic layer preferably has a different thickness, preferably in the range of 0.001 mm to 2 mm. As a result of the different layer thicknesses, the first and second ceramic layers have different structures and thus different gloss levels; in particular, both ceramic layers can be made of the same ceramic material. Different layer thicknesses can be used to achieve visual effects.

[0049] Alternatively, the ceramic materials of the first and second ceramic layers can also be different, in particular the thickness of the second ceramic layer can be equal to the thickness of the first ceramic layer, in order to obtain different gloss levels for the first and second ceramic layers. The use of different ceramic layers further increases the visual and combination possibilities for realistically imitating natural materials.

[0050] The ceramic material of the ceramic layer may be, for example, hafnium diboride, molybdenum diboride, tantalum diboride, titanium diboride, tungsten diboride, vanadium diboride, zirconium diboride, or a mixture of these ceramic materials. The advantages of these materials are their durability and hardness, which lead to improved pressing properties of the press tool.

[0051] An embodiment of the press tool according to the invention may be, for example: providing a support structure for the base structure; applying at least two base structure layers to a support structure to form a base structure; creating a structured surface on a support structure; applying a first ceramic layer to a surface of the base structure; It can be produced by applying a second ceramic layer onto a structured surface and / or an applied first ceramic layer.

[0052] This allows for the creation of particularly durable surfaces which can nevertheless be shaped to realistically mimic the appearance of real objects, in particular the appearance of wood.

[0053] In another advantageous development, the method further comprises the steps of: applying a partial mask to the structured surface of the base structure; applying a first ceramic layer to the masked structured surface; removing the mask so that the first ceramic layer is only partially disposed on the structured surface; and applying a second ceramic layer over the partially applied first ceramic layer and the structured surface of the base structure.

[0054] The advantage here is that individual areas on the press tool can have different visual properties, for example gloss, yet the production is simple and the masking method has proven effective.

[0055] In an alternative embodiment, the method comprises: blanket applying a first ceramic layer to the structured surface of the base structure; applying a partial mask to the first ceramic layer; applying a second ceramic layer onto the masked first ceramic layer.

[0056] An advantage in this case is that individual areas on the press tool can have different visual properties, for example glossiness, and also contribute to the overall relief structure of the press tool.

[0057] Optionally, the mask can be removed so that the first ceramic layer is only partially disposed on the structured surface.

[0058] In another optional method embodiment, a metal layer, a chromium layer, a nickel layer or a nickel-containing metal layer can be applied as the mask.

[0059] In this case, the mask can advantageously remain on the press tool as a functional layer.

[0060] The method according to the invention can be complemented by a post-treatment step, whereby the applied ceramic layer or mask, respectively, can be treated to give the corresponding ceramic layer or mask a predetermined degree of gloss.

[0061] In one embodiment, the application of the ceramic layer can be performed by a surface magnetron sputtering coating apparatus, and the ceramic layer is partially fabricated by appropriately controlling the surface magnetron sputtering coating apparatus, thereby ensuring a consistent application of the ceramic layer with a precisely controlled or adjustable layer thickness.

[0062] The method according to the invention can be further developed to additionally carry out the following steps: transporting the press plate on a transport device; opening a first lock leading to the processing chamber; Loading the press plate into a processing chamber of a surface magnetron sputtering coating apparatus; closing the first lock; creating a vacuum in the processing chamber with a vacuum pump; applying one or more ceramic layers by magnetron; opening a first lock leading to the processing chamber; The step of removing the press plate from the processing chamber of the surface magnetron sputtering coating apparatus through a first lock.

[0063] This advantageous development allows for a cost-effective production of the press tool.

[0064] The method according to the invention comprises the following additional steps: The press plate can be transported through a vacuum pre-chamber equipped with a pre-chamber lock, which is located upstream of the processing chamber in the transport direction, and which is brought by a vacuum pump to a pressure level between atmospheric pressure and the processing pressure when applying the ceramic layer in the processing chamber, which processing pressure is in particular less than or equal to 10-5 mbar, preferably 10-8 mbar.

[0065] This advantageous process improvement results in more energy-efficient coatings.

[0066] Alternatively, the method according to the invention may include the additional step: transporting the press plate through a vacuum pre-chamber equipped with a pre-chamber lock, which is located upstream of the processing chamber in the direction of transport and which is brought by a vacuum pump to a pressure level lying between atmospheric pressure and the processing pressure during application of the ceramic layer in the processing chamber, said processing pressure being in particular below 10 mbar, preferably 10 mbar; and conveying the press plate through a vacuum post-chamber equipped with a post-chamber lock, the vacuum post-chamber being located downstream of the processing chamber in the conveying direction, the vacuum post-chamber being brought to a pressure level between atmospheric pressure and the processing pressure by a vacuum pump. Advantageously, optimized processing is thus possible using a small amount of energy for vacuum generation.

[0067] Another aspect of the invention is the use of a press tool according to the invention for producing blanks, in particular blanks for the furniture industry or laminate flooring panels. Advantageously, with the press tool according to the invention, blanks, in particular blanks for the furniture industry or laminate flooring panels, can be produced in large quantities with low wear.

[0068] Embodiments of the present invention are illustrated by way of example in the accompanying schematic drawings. [Brief explanation of the drawings]

[0069] [Figure 1] FIG. 1 is a perspective view of a press plate having a press surface. [Figure 2] FIG. 2 is a side cross-sectional view of the press plate portion. [Figure 3A-3C] 3A-3C show intermediate stages of the press plate during manufacture. [Figure 4] FIG. 4 is a side cross-sectional view of a press plate portion of an alternative embodiment. [Figure 5] FIG. 5 is a side cross-sectional view of a press plate portion of another alternative embodiment. [Figure 6] FIG. 6 is a side cross-sectional view of the press plate and laminate during the pressing process in a closed press. [Figure 7] FIG. 7 is a side cross-sectional view of a surface magnetron sputtering coating apparatus. DETAILED DESCRIPTION OF THE INVENTION

[0070] 1 is a perspective view of a press tool, in this example designed as a press plate 1. The press plate 1 comprises a press surface 2. The press side 3 is the side of the press plate 1 that faces the laminate during the pressing process in the press.

[0071] FIG. 2 is a side cross-sectional view of the press plate portion.

[0072] The press surface 2 may be formed smooth, but in this embodiment, it includes a structure consisting of raised portions 4 and recessed portions 3 .

[0073] The structure of the pressing surface 2 is adapted in particular to natural materials, in this case wood.

[0074] The press surface 2 is disposed on a plurality of base structure layers 15 of the base structure 10. In addition to the base structure layers 15, the base structure 10 also includes a support structure.

[0075] In this embodiment, the first ceramic layer 11 is partially disposed on the base structure 10 , and the second ceramic layer 12 completely covers the surface 31 of the base structure 10 and the first ceramic layer 11 .

[0076] The press plate 1 allows workpieces, for example material boards, for example laminates, to be produced by pressing. After pressing, the workpiece has a structured surface corresponding to the structure of the press surface 2.

[0077] The press plate 1 comprises a base structure 10 with a structured surface 31 corresponding to the structure of the press surface 2, in this example shown in FIG. 3A.

[0078] The press plate 1 comprises, in this embodiment, a partial ceramic layer 11 arranged on the structured surface 31 of the base structure 10 and a full ceramic layer 12 arranged on this partial ceramic layer 11 and forming the press surface 2.

[0079] In this embodiment, the base structure 10 is made of metal.

[0080] In this example, the press plate 1 comprises a base support, in particular a support structure 14, for example made of metal, on which the base structure 10 is arranged.

[0081] In this embodiment, the base structure 10 comprises a plurality of base structure layers 15 positioned one above the other, preferably made of nickel, at least some of which are partially designed to form a relief layer structure 16 together with the ceramic layers 11, 12.

[0082] To produce the base structure 10, a mask (not shown in detail) is applied at least once to the base structure layer 15 to cover areas, for example in accordance with image data corresponding to the structure of the structured pressing surface 2, and then another base structure layer 15 is applied to the areas not covered by this mask. This is repeated until the base structure 10 is produced. The base structure 10 is produced in particular in accordance with the structure of the pressing surface 2, i.e. in accordance with image data corresponding to the protrusions 4 and depressions 5, for which purpose a mask and a base structure layer 15 are applied successively in accordance with these image data, for example by electroplating or chemical methods.

[0083] Next, in this embodiment, a mask 32 shown in FIG. 3B is applied to the structured surface 31 of the base structure 10 to partially cover the structured surface 31 of the base structure 10 .

[0084] Next, in this embodiment, a surface magnetron sputtering coating device 33 is used to apply a ceramic layer to the regions of the structured surface 31 of the base structure 10 that are not covered by the mask 32. The mask 32 is then removed, and only the regions of the structured surface 31 of the base structure 10 that are not covered by the mask 32 are covered with the ceramic layer, resulting in a partial ceramic layer 11. See Figure 3C. By appropriately controlling the surface magnetron sputtering coating device 33, the partial ceramic layer 11 can be given a predetermined thickness, thereby achieving a predetermined glossiness.

[0085] Next, in this embodiment, a full ceramic layer 12 is applied onto the partial ceramic layer 11 using a surface magnetron sputtering coating device 33. In order to adjust the glossiness of the full ceramic layer 12, the full ceramic layer 12 is controlled by the surface magnetron sputtering coating device 33 to obtain a predetermined thickness.

[0086] In this embodiment, both ceramic layers 11, 12 are made of the same ceramic material, such as hafnium diboride, molybdenum diboride, tantalum diboride, titanium diboride, tungsten diboride, vanadium diboride, zirconium diboride, or a mixture of these ceramic materials.

[0087] Since the ceramic layers 11 and 12 have different gloss levels, in this embodiment the thicknesses of the two ceramic layers are different, in particular the full ceramic layer 12 is thinner than the partial ceramic layer 11, and in particular both ceramic layers 11 and 12 are made of the same ceramic material.

[0088] The thickness of both ceramic layers 11 and 12 is preferably in the range of 1 μm to 2 μm.

[0089] The ceramic layer preferably has a Vickers hardness of at least 2000 HV.

[0090] To adjust the different gloss levels of the ceramic layers 11, 12, they may also comprise different ceramic materials.

[0091] To adjust the glossiness of the ceramic layers 11 and 12, post-treatment such as polishing or laser treatment may be performed.

[0092] It is also possible to first apply the full ceramic layer 12 to the structured surface 31 of the base structure 10 and then apply the partial ceramic layer 11 thereon.

[0093] By properly controlling the surface magnetron sputtering coating device 33, it is also possible to produce a partial ceramic layer 11.

[0094] 4 shows a cross-sectional side view of an alternative embodiment of a press plate. The first ceramic layer 11 and the second ceramic layer 12 are each only partially applied to the structured surface 31 of the base structure 10. The base structure layer 15 can be made of a metal, in particular nickel, as in the other embodiments, but can also be made of other materials, such as plastic or ceramic. The base structure layer 15 can be produced using known additive or subtractive manufacturing methods.

[0095] In another advantageous development of this embodiment, a second ceramic layer 12 can be arranged at least partially on the first ceramic layer 11 .

[0096] The first ceramic layer 11 or the second ceramic layer 12 can also be laser processed, at least in the laser processing area 17. Laser processing can affect, among other things, the gloss, reflective properties, mattness or structure of the ceramic layer and can be used to positively transfer these structural properties to the laminate produced thereby.

[0097] 4, the second ceramic layer 12 can cover the entire structured surface 31 of the base structure 10 and have a second thickness 19, and the first ceramic layer 11 has a first thickness 18. In this case, the first thickness 18 and the second thickness 19 can have different layer thicknesses in order to obtain different gloss levels of the first and second ceramic layers 11, 12, and in particular both ceramic layers 11, 12 can consist of the same ceramic material.

[0098] The ceramic material of the ceramic layers 11, 12 in all embodiments of the present invention can be, for example, hafnium diboride, molybdenum diboride, tantalum diboride, titanium diboride, tungsten diboride, vanadium diboride, zirconium diboride, or a mixture of these ceramic materials.

[0099] In another embodiment according to FIG. 4, the ceramic materials of the two ceramic layers 11, 12 may be different in order to obtain different degrees of gloss of the first ceramic layer 11 and the second ceramic layer 12, in particular the thickness 19 of the second ceramic layer 12 being equal to the thickness 18 of the first ceramic layer 11.

[0100] The thickness of both ceramic layers 11, 12 is preferably in the range of 1 μm to 2 mm.

[0101] In the overlap region 13, both ceramic layers can be arranged at least partially overlapping each other.

[0102] 5 shows a cross-sectional side view of a press plate portion of another alternative embodiment, in which both ceramic layers 11, 12 are arranged at least partially on top of one another. The second ceramic layer 12, arranged on the press side 7 of the press tool, has at least one opening 5 through which the first ceramic layer is exposed or opens up like a window 6 towards the surface. This can be achieved by using a mask 32 when applying the ceramic layer 12 and subsequently removing the mask 32, or by removing part of the second ceramic layer 12 chemically, for example with a sodium hydroxide solution.

[0103] Otherwise, the base structure is based on the embodiment of FIGS. 2 and 3 or 4.

[0104] 6 shows a side cross-sectional view of a press plate and laminate during a pressing process in a closed press. In a press 20, such as a short-cycle press, a press tool, in particular a press plate 1, rests on a press pad 9. During the illustrated pressing process, with the press 20 part closed, a laminate 8, in particular a material board for the furniture industry or flooring panels, melts under the action of temperature and pressure, and the negative shape of the press surface 2 with its depressions 3 and ridges 4 is reproduced as a positive in the laminate 8.

[0105] FIG. 7 shows a side cross-sectional view of a surface magnetron sputtering coating apparatus 33.

[0106] In this embodiment, a surface magnetron sputtering coating apparatus 33 is shown as a multi-chamber apparatus, however, alternatively a single-chamber apparatus having only one processing chamber 24 and no other chambers is also possible.

[0107] The press tool, in particular the press plate 1, is introduced into the vacuum pre-chamber 25 by the transfer device 21 when the pre-chamber lock 26 is opened. The pre-chamber lock 26 is closed, and the vacuum pump 30 reduces the pressure in the vacuum pre-chamber 25, for example, to below 10-2 mbar, preferably to 10-5 mbar. Meanwhile, lock 22 is closed, and the processing chamber is at processing pressure. Lock 22 then opens, and pressure equalization occurs between the processing chamber 24 and the vacuum pre-chamber 25. This allows for energy savings and cycle time gains compared to single-chamber systems. The press tool is then transferred into the processing chamber 24. Locks 22 and 23 are closed, and the vacuum pump 29 evacuates the processing chamber. The processing pressure is below 10-3 Pa (10-5 mbar), preferably 10-6 Pa (10-8 mbar). After the processing process is completed, the press tool is transferred through the open lock 23 into the vacuum chamber, which, before the post-chamber lock opens, is at a pressure level similar to that of the vacuum pre-chamber. The vacuum pre-chamber and vacuum post-chamber can be connected to each other via a valved vacuum line, which allows the vacuum to be exchanged between the vacuum pre-chamber and the vacuum post-chamber at cycle changes in the continuous operation of the surface magnetron sputtering coating apparatus 33, saving energy for the operation of the vacuum pump 30. For all embodiments of the present invention, other PVD coating apparatuses, PVD sputtering apparatuses, magnetron sputtering apparatuses or similar apparatuses can also be used instead of the surface magnetron sputtering coating apparatus. [Explanation of symbols]

[0108] 1 Press Plate 2 Press surface 3. Recessed part 4 Ridges 5 Opening 6 Cut 7 Press Side 8. Material Board 9 Press Pad 10 Base Structure 11 ceramic layer 12 ceramic layers 13 Overlap Area 14 Support structure 15 Base structural layer 16 Relief layer structure 17 Laser processing area 18 Thickness (first ceramic layer) 19 Thickness (second ceramic layer) 20 Press Machine 21 Conveyor equipment 22 Rock 23. Rock 24 processing chambers 25 Vacuum pre-chamber 26 Pre-chamber lock 27 Vacuum Post Chamber 28 Post Chamber Lock 29 Vacuum Pump 30 Vacuum Pump 31 surface (of base structure 10) 32 Mask 33 Surface magnetron sputtering coating equipment 34 Metal layer 3. 5 functional layers 36 Magnetron

Claims

1. A press tool for manufacturing a workpiece, comprising: a press surface (2); a base structure (10) having a surface (31); A press tool for manufacturing a workpiece, comprising at least two ceramic layers (11, 12) arranged on the surface (31) and forming the press surface (2), wherein a first ceramic layer (11) has a first glossiness and a second ceramic layer (12) has a second glossiness different from the first glossiness of the first ceramic layer (11).

2. 2. A press tool according to claim 1, wherein the press tool is a press plate (1) for producing material boards (8).

3. 3. A press tool according to claim 1 or 2, wherein the base structure (10) of the press tool comprises a support structure (14) made of metal, in particular stainless steel.

4. the press surface (2) has a structure of ridges (4) and recesses (3), and the base structure (10) has a structured surface (31) provided on a support structure (14); 4. A press tool according to claim 1, wherein at least two, in particular metallic, base structural layers (15) are provided on the support structure (14), the base structural layers (15) being arranged at least partially on top of one another and forming the structured surface (31) of the base structure (10).

5. 5. The press tool according to claim 1, wherein the first ceramic layer (11) or the second ceramic layer (12) is applied only partially to the structured surface (31) of the base structure (10) and forms a relief layer structure (16) of the structured surface (31).

6. 5. The press tool according to claim 1, wherein the first ceramic layer (11) and the second ceramic layer (12) are each only partially applied to the structured surface (31) of the base structure (10).

7. A press tool according to any one of the preceding claims, wherein the second ceramic layer (12) is at least partially arranged on the first ceramic layer (11).

8. 8. The press tool according to claim 1, wherein the first ceramic layer (11) or the second ceramic layer (12) is laser processed at least in a laser processing area (17).

9. 8. A press tool according to claim 7, wherein the second ceramic layer (12) is provided with openings (5) which, viewed in the direction of the base structure (10), reach the first ceramic layer (11).

10. 10. A press tool according to claim 9, wherein the openings (5) are incisions (6) made by subsequent processing of the applied second ceramic layer (12).

11. The press tool of claim 10, wherein the subsequent processing is laser processing.

12. 12. The press tool according to claim 1, wherein at least one of the metal layers (15) arranged on the press side (7) of the base structure (10) is a nickel layer or a nickel-containing metal layer.

13. 13. The press tool according to any one of the preceding claims, wherein the structured surface (31) of the base structure (10) is produced at least in part by additive manufacturing with a three-dimensional relief layer structure (16).

14. 13. The press tool according to any one of the preceding claims, wherein the structured surface (31) of the base structure (10) is at least partially produced in three-dimensional form by an electrochemical, mechanical or laser machining process.

15. the second ceramic layer (12) completely covers the structured surface (31) of the base structure (10) and has a second thickness (19); the first ceramic layer (11) has a first thickness (18); 15. A press tool according to any one of claims 1 to 14, wherein the first thickness (18) and the second thickness (19) have different layer thicknesses in order to obtain different degrees of gloss of the first ceramic layer (11) and the second ceramic layer (12), in particular both ceramic layers (11, 12) being made of the same ceramic material.

16. 15. Press tool according to any one of claims 1 to 14, wherein the ceramic materials of both ceramic layers (11, 12) are different in order to obtain different degrees of gloss of the first ceramic layer (11) and the second ceramic layer (12), in particular the thickness (19) of the second ceramic layer (12) is equal to the thickness (18) of the first ceramic layer (11).

17. 17. Press tool according to any one of the preceding claims, wherein the ceramic material of the at least two ceramic layers (11, 12) is hafnium diboride, molybdenum diboride, tantalum diboride, titanium diboride, tungsten diboride, vanadium diboride, zirconium diboride, or a mixture of these ceramic materials.

18. A method for manufacturing a press tool according to any one of claims 1 to 17, comprising the following method steps: providing a support structure (14) for said base structure (10); applying at least two base structure layers (15) to said support structure (14) to form said base structure (10); creating a structured surface (31) on said support structure (14); applying the first ceramic layer (11) to the structured surface (31) of the base structure (10); and applying said second ceramic layer (12) onto the structured surface (10) and / or said applied first ceramic layer (11).

19. applying a partial mask (32) to the structured surface (31) of the base structure (10); applying the first ceramic layer (11) to the partially masked structured surface (31); removing the partial mask (32) so that the first ceramic layer (11) is only partially disposed on the structured surface (31); and applying the second ceramic layer (12) fully onto the partially applied first ceramic layer (11) and the structured surface (31) of the base structure (10).

20. applying the first ceramic layer (11) entirely onto the structured surface (31) of the base structure (10); applying a partial mask (32) to the first ceramic layer (11); and applying the second ceramic layer onto the first ceramic layer (11) that has been subjected to the partial mask (32).

21. 21. A method for manufacturing a press tool according to claim 20, comprising removing the partial mask (32) so that the first ceramic layer (11) is only partially disposed on the structured surface (31).

22. The method for manufacturing a press tool according to any one of claims 19 to 21, wherein a metal layer (34), a chromium layer, a nickel layer or a nickel-containing metal layer is applied as the partial mask (32).

23. 23. The method for manufacturing a press tool according to claim 22, wherein the partial mask (32) remains on the press tool as a functional layer (35).

24. 25. A method for manufacturing a press tool according to any one of claims 18 to 24, comprising a step of post-treating the corresponding applied ceramic layer (11, 12) or mask (32) in order to obtain a predetermined glossiness of the corresponding ceramic layer (11, 12) or mask (32).

25. applying the at least two ceramic layers (11, 12) by a surface magnetron sputtering coating device (33); 25. Method for manufacturing a press tool according to any one of claims 18 to 24, wherein the partial manufacturing of the at least two ceramic layers (11, 12) is performed by appropriately controlling the surface magnetron sputtering coating device (33).

26. Transporting the press plate (1) on a transport device (21); opening a first lock (22) leading to a processing chamber (24); Loading the press plate (1) into the processing chamber (24) of the surface magnetron sputtering coating device (33); closing the first lock (22); creating a vacuum in the processing chamber (24) by a vacuum pump (29); applying one or more ceramic layers (11, 12) by a magnetron (36); opening the first lock (22) leading to the processing chamber (24); and removing the press plate (1) from the processing chamber (24) of the surface magnetron sputtering coating device (33) through the first lock (22).

27. the additional step of transporting said press plate (1) through a vacuum pre-chamber (25) equipped with a pre-chamber lock (26), The vacuum pre-chamber (25) is located upstream of the processing chamber (24) in the conveying direction, 27. A method for producing a press tool according to claim 26, wherein the vacuum pre-chamber (25) is brought by a vacuum pump (30) to a pressure level lying between atmospheric pressure and the processing pressure when applying the ceramic layers (11, 12) in the processing chamber (25), said processing pressure being in particular below 10-3 Pa, preferably 10-6 Pa.

28. Additional steps, namely: The press plate (1) is conveyed through a vacuum pre-chamber (25) equipped with a pre-chamber lock (26), the vacuum pre-chamber (25) being located upstream of the processing chamber (24) in the conveying direction; the vacuum pre-chamber (25) is brought to a pressure level by a vacuum pump (30) between atmospheric pressure and the processing pressure during application of the ceramic layers (11, 12) in the processing chamber (25), this processing pressure being in particular less than or equal to 10 Pa, preferably 10 Pa; the press plate (1) is conveyed through a vacuum post-chamber (27) equipped with a post-chamber lock (28), the vacuum post-chamber (27) being located downstream of the processing chamber (24) in the conveying direction; and bringing the vacuum post-chamber (27) to a pressure level between atmospheric pressure and the working pressure by means of a vacuum pump (30).

29. Use of a press tool according to any one of claims 1 to 17 for the production of material boards.

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