AT520241A2 - Process for the production of relief plates - Google Patents

Abstract

A method with which a surface-structured relief plate for interior work or furniture or the like is produced, comprises the following method steps: a) Provide a. a press with a punch, b. a plate-shaped, surface-structured front tool (5), the structured front tool having as a structure a surface structure of a non-planar structured wood plate to be simulated by the surface appearance and structure, and c. a rear tool, in particular a structured rear tool (6) or an unstructured rear tool; b) providing d. a first exterior veneer, e. a single or multi-layer support plate, f. and preferably a reverse veneer. c) printing the first outer veneer before step d) with an image of the wood panel to be replicated by a printing process, and d) compressing a layered stack consisting of the outer veneer (2), the support panel (3) and preferably the inner veneer (4) between the structured front tool and the flat or structured rear tool with the press to the relief plate.

Description

Process for the production of relief plates

The invention relates to a method with which a surface-structured relief plate for interior construction or furniture construction or the like is produced.

From EP 2 801 456 A1 by the same applicant, a method of structuring the surface of panels, furniture panels or the like is known, in which a veneer provided with recesses is pressed with a solid-colored plate. With this method it is possible to give panels or furniture panels an appearance of wooden structures with an authentic, three-dimensional surface, which corresponds to the old or antique wooden structures. Like a wood grain, the surface structure runs essentially parallel to the direction of growth of the wood.

There is a general need to produce relief panels with a wood look and structure that differ from the look of the outer veneer used, but that comes very close to that of another piece of wood, especially that of a wood panel, especially that of a natural wood panel. There are some special cases, the manufacture of which is particularly difficult or was not feasible according to the state of the art.

There is a need to produce relief panels with a wood look and structure that correspond to a tree bark look and surface structure, but that are not made from natural bark material. A tree bark look is a look that arises when a surface section of an outer circumference of a tree is viewed with a bark. A surface structure of a tree bark is the corresponding surface structure of this section of the bark on the outer circumference of the tree. In this way, individual tree species are protected so that their bark is not available. With the method according to the invention, the barks of such trees can be simulated in a simple manner.

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There is also a need to produce relief panels with a wood look and structure that correspond to the appearance and structure of a wood panel (also called “burned wood”) that has burn marks at least in sections or entirely on the outer visible surface, but that is not made of such wood are made.

A end grain optic in the sense of this application is an optic that corresponds to an optic that arises when one cuts a log through the main direction of extent. Then segments of the annual rings or even complete ones

Annual rings can be seen as circles. On the one hand, the ring structure should be three-dimensional - in the form of ring-like depressions and elevations that correspond to the annual rings - and on the other hand, it should also be clearly visible.

The object of the present invention is therefore to create a method with which a relief plate with an at least one-sided and at least sections on this side surface structure is produced, which has a structure and an appearance that that of another wood, in particular one Tree bark or a piece of wood, at least on the outer surface, showing traces of burns.

This object is achieved with a method with which a surface-structured relief panel for interior construction or furniture panels or the like is produced, with the following method steps:

a) Provide

a.

b.

a press with a stamp, a plate-shaped, surface-structured front tool, the structured front tool having as a structure a surface structure of a non-planar structured wooden plate to be reproduced by the surface optics and structure, and and / 17

c. a back tool, in particular a structured back tool or a non-structured back tool;

b) Provide

d. a first outer veneer,

e. a single or multi-layer core board,

f. and preferably a back veneer.

c) printing the first outer veneer before step d) with an image of the wooden plate to be reproduced using a printing process, and

d) pressing a layered stack consisting of the outer veneer, the carrier plate and preferably the inner veneer between the structured front tool and the flat or structured rear tool with the press to the relief plate.

With the method according to the invention, it is advantageously possible to emboss an embossed relief plate, e.g. can be used as a panel or furniture panel, with a look and

To produce a structure that comes surprisingly close to that of a piece of natural wood with a structure other than the structure of the veneer. Because by printing the photo in interaction with the surface structuring, the natural wood impression is easily strengthened compared to a pure surface structuring.

The photo of the section of the wooden plate to be reproduced is preferably printed in its original size, which was also the template for the surface structuring of the front tool. Then the photo and the relief or the structure of the relief plate overlap very precisely and the look of the relief plate with printing comes particularly close to that of the original wood.

As the veneer to which the picture, in particular photo, is applied and which is structured on the surface, oak real wood veneer is preferably used, in particular in various versions such as smoked or bleached and reconstructed veneers such as e.g. Alpilignum (Alpi) veneers.

The photo can be the photo of a bark section of the outer circumference of a tree, for example a birch or an oak. The surface structure is then the structure of a tree bark, in particular the piece of tree bark. The wood of the process to be imitated for this bark look is preferably - but not exclusively - wood of the types oak, beech, birch, larch or spruce, since particularly good imitation results can be achieved in this respect.

Alternatively, however, it is also possible, for example, to produce a relief panel with a wood look and structure that matches the look and structure of a piece of wood (also “burned

Wood ”). Then the photo is the photo of a section of wood with traces of burns. The surface structure is then the structure of this wood. The wood to be imitated for this "burned wood" variant of the process is preferably - but not exclusively - wood of the oak, beech, birch, larch or spruce type, since there are particularly good ones

Let imitation results be achieved.

End grain optics can also be achieved with the invention. Then a picture of end grain is printed on the veneer and an embossing of end grain is introduced into the veneer. The wood of the process to be imitated for this "end grain look" is preferably - but not exclusively - wood of the types oak, beech, birch, larch or spruce, since particularly good imitation results can be achieved in this respect.

The interplay between the printing and the structuring gives the embossed relief plate a three-dimensional and therefore authentic appearance of another piece of wood, for example a piece of tree bark or a wood that looks burned, without having to accept the disadvantages of the corresponding natural product. Pieces of bark could detach from a piece of wood with natural bark - for example a birch bark or oak bark / 17 and fall off, or soot or ash could detach from the burned piece of wood or the wooden panel. These disadvantages do not occur on the relief plate created.

According to a variant, a further method step can follow the method of claim 1, in which at least one crack is milled out of the embossed relief plate. This results in an even more authentic, three-dimensional look of the wood to be reproduced on the embossed relief plate.

In a preferred embodiment of the invention, the first outer veneer is a real wood veneer, the wood grain of which does not correspond to the surface structure of the wood to be reproduced. As a result, a commercially available veneer which is therefore easy to obtain is advantageously used, but which, after having gone through the process according to the invention, has an appearance which is particularly close to that of a wooden plate with a different appearance and structure. The actual grain parallel to the tree trunk is still present after the surface structuring. By printing the photo - e.g. with the bark optics - but it is no longer recognizable or strongly disappears into the background. The same applies analogously to the manufacture of a panel with the structure and appearance of a wooden panel which has sections of burn marks on the surface.

The first outer veneer can be a wood veneer with knots. This creates a view that comes even closer to that of real wood.

In a further preferred embodiment variant of the invention, the carrier board is a board made of a wood-based material, preferably a wood fiber board, particularly preferably a medium-density fiber board (MDF).

It is also advantageous if the digital printing process is an inkjet printing process with UV-curable ink. As a result, a photo-realistic image of the piece of wood to be reproduced, in particular a bark image of a tree trunk, can be printed simply, quickly and advantageously on the veneer to be embossed and embossed.

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In a further preferred embodiment of the invention, in the area of a drying crack, the outer veneer is completely removed by milling, so that at least one layer underneath is visible.

A roughness of more than 1-2 mm is preferably achieved when pressing. For this purpose, the press ram pressure is preferably more than 300 kg / cm ² . The press ram further preferably has an area of more than 2 m ² .

The single or multi-layer carrier plate is preferably more than 5 mm thick.

It is also advantageously possible to implement a method in which a surface-structured relief plate for interior construction or furniture construction or the like is produced, with the following method steps: a) providing a. a press with a stamp, b. a plate-shaped, surface-structured

Front tool, wherein the structured front tool has as a structure a surface structure of a non-planar structured wooden plate to be reproduced by the surface optics and structure, and c. a back tool, in particular a structured back tool or a non-structured back tool;

b) Providing d. a first outer veneer, e. a single or multi-layer carrier board, f. and preferably a back veneer; c) pressing a layered stack consisting of the outer veneer, the carrier plate and preferably the inner veneer (4) between the structured front tool and the flat or structured back tool with the press to form the relief plate, d) printing the first outer veneer or the relief plate from step c) with a

Image of the wooden board to be reproduced using a printing process.

Printing before pressing leads to particularly advantageous results with the burned wood or bark look variants. The variants of the subclaims can also be combined with this method. In the case of brainhole optics, the above-mentioned types of wood are used with particular advantage in this method.

Further advantageous embodiments of the invention can be found in the subclaims.

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The inventive method is explained in more detail below with reference to the accompanying drawings. It shows:

Figure 1 is a schematic representation of an intermediate step of a variant of a method according to the invention; and

Figure 2: a photo of a piece of tree bark.

In a first method step of the variant of the method according to the invention to be explained below, a press (not shown here) is provided with a press die, provided or equipped with a structured plate-like front tool 5 and a rear tool, preferably a structured or plate-like rear tool 6.

Furthermore, a first outer veneer 2, at least one single-layer or multi-layer carrier plate 3 and preferably at least back veneer 4 are provided and arranged between the press die with the front tool 1 and the back tool (press table).

The plate-shaped front tool 5 has, for example, the structure of a relief structure in the manner of a piece of bark relief 7 (see FIG. 2). The structuring of the front tool 5 points to the outer veneer 2. The front tool 5 is preferably made of a metal.

The front tool 5 may - but need not - have an overall convex curvature, so that the finished plate is correspondingly curved on the surface as a whole and concave on the structured surface. The actual structure of the bark is then incorporated into this concave geometry. The curvature is preferably chosen such that it corresponds to the curvature of the outer circumference of a tree with the bark. This plate can be used for cladding columns or the like, but also in other ways.

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A wood veneer, in particular a real wood veneer, is preferably used as the first outer veneer 2, the wood grain of which lies parallel to the growth direction of the tree. The first outer veneer 2 can be a wood veneer, for example an oak veneer - with knots or an appealing visual one

To achieve basic impression on the embossed relief plate to be produced, which can be used as a panel or furniture plate. Alternatively, veneers made from other types of wood can also be used. A wood veneer can also be selected as an at least first blind veneer.

A plate made of a wood material, preferably a wood fiber board, particularly preferably a medium density fiber board (MDF), is provided as the carrier board 4. This can have a dark, particularly preferably a dark brown or black surface. The carrier plate can also be provided with blind veneers on one or both outer sides.

The plate-shaped rear tool 6 can also be structured and can also be curved (then preferably concave) or also smooth or flat. The back tool 6 and the front tool 5 are preferably made of a metal.

In this state, preferably, a photo or another image of a piece of wood - for example a piece of tree bark, in particular birch or oak bark - is printed on the first outer veneer 2.

In a next process step, a layered stack shown in FIG. 1, consisting of the first outer veneer 2, the single-layer or multi-layer carrier plate 3, the back veneer 4 is placed between the front tool 5 and the back tool 6 of the press.

The outer veneer with the photo and the surface-structured front tool 5 are then brought into alignment before the pressing, so that the structures recognizable in the photo are brought into alignment with the corresponding corresponding structures of the tool.

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The pressing process is then carried out. This creates an embossed relief plate with a relief provided at least in sections as a one- or two-sided structural embossing.

The combination of relief and photo with preferably matching structures leads to a relief plate with a changed look, for example a tree bark look and structure, which is excellently suitable for interior fittings or furniture construction. For example, pillars or the like can be clad with the wooden panels in bark look. The board produced looks essentially like the natural wood to be reproduced (Fig. 2).

The printing method is preferably a digital printing method, particularly preferably an inkjet printing method with UV-curable ink. The interplay between the printing and the first outer veneer 2 structured by the front tool 5 results in a three-dimensional and thus authentic appearance of another piece of wood on the embossed relief plate, for example a piece of tree bark or a burnt-looking wood, without accepting its disadvantages are the disadvantages that soot dust could fall off the burnt piece of wood or the wooden plate or that pieces of bark could come off and fall off like a piece of wood with natural bark.

The image of the wood to be reproduced (and / or the relief or the embossing stamp) can have at least one drying crack. In a further process step, the drying crack 1 is additionally milled out in the embossed relief plate printed with the image (see FIG. 5). This leads to a further improvement in appearance, especially if the drying crack is deepened by milling. The first outer veneer 2 is preferably completely removed in the area of the drying crack, so that the underlying first veneer and / or the

Carrier plate 3 is visible. Due to the preferably dark surface of the carrier plate 3, the printed and embossed relief plate 9 results in a three-dimensional and thus authentic appearance of the drying crack 11.

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The method according to the invention advantageously makes it possible to structure the surface of plate-shaped components, in particular an embossed relief plate 9, which, for example, can be used as a panel or furniture panel with an authentic, three-dimensional end grain look.

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LIST OF REFERENCE NUMBERS

front tool

exterior veneer

3 blind veneer

Carrier plate

blind veneer

exterior veneer

rear tool

8 end grain relief

Embossed relief plate

Grain wood image

Trocknungsriß

Claims (15)

1. Method with which a surface-structured relief plate for interior construction or furniture construction or the like is produced, with the following method steps: a) Provide a. a press with a stamp, b. a plate-shaped, surface-structured front tool (5), the structured front tool having as structure a surface structure of a non-planar structured wooden plate to be reproduced by the surface optics and structure, and c. a back tool, in particular a structured back tool (6) or a non-structured back tool; b) Provide d. a first outer veneer, e. a single or multi-layer core board, f. and preferably a back veneer. c) printing the first outer veneer before step d) with an image of the wooden plate to be reproduced using a printing process, and d) pressing a layered stack consisting of the outer veneer (2), the carrier plate (3) and preferably the inner veneer (4) between the structured front tool and the flat or structured rear tool with the press to the relief plate. 2. The method according to claim 1, characterized in that a digital printing process is used as the printing process. 30 3. The method according to claim 1 or 2, characterized in that the image and the structuring of the press stamp reflect the surface of the wooden plate to be reproduced on the same scale. 13/17 4. The method according to any one of the preceding claims, characterized in that the press stamp is brought into congruence with the printed image during pressing. 5. The method according to any one of the preceding claims, characterized in that the photo is the photo of a section of a tree bark of a tree and that the surface structure of the front tool (5) is the surface structure of this section of the tree bark. 10 6. The method according to any one of the preceding claims, characterized in that the photo is the photo of a wooden panel showing traces of burns in sections or entirely on at least one surface to be reproduced and that the surface structure of the front tool (5) is the surface structure of the wooden panel. 7. The method according to any one of the preceding claims, characterized in that the outer veneer with the photo and the surface-structured front tool (5) are made to coincide before the pressing. 20 8. The method according to any one of the preceding claims, characterized in that the bark image has at least one or more drying cracks. 9. The method according to any one of the preceding claims, characterized in that a drying crack is milled from the embossed relief plate. 10. The method according to any one of the preceding claims, characterized in that the single or multi-layer carrier plate has a dark, particularly preferably a dark brown or black surface. 30 11. The method according to any one of the preceding claims, characterized in that an oak real wood veneer is used as the veneer to which the image, in particular photo, is applied and which is surface-structured. 14/17 12. The method according to any one of the preceding claims, characterized in that the carrier plate (3) is a plate made of a wood material, preferably a wood fiber board, particularly preferably a medium density fiber board (MDF). 5 13. The method according to any one of the preceding claims, characterized in that an ink jet printing process with UV-curable ink is used as the digital printing process. 14. The method according to any one of the preceding claims, characterized in 10 that the press ram pressure is more than 300 kg / cm ² . 15. The method according to any one of the preceding claims, characterized in that the press ram has an area of 2 m ² or more.