DE102012006451A1 - Process of surface structuring - Google Patents

Abstract

In a method of surface structuring of panels or the like by pressing, a surface texture of a roughness of more than 2 mm is achieved by pressing more than three layers of veneer or the like on a press table under a patterned press die.

Description

The invention relates to a method of surface structuring in panels, furniture panels or the like by pressing.

The methods of surface structuring in panels, furniture panels or the like are known in various embodiments.

In a variety of these known methods, only a surface refinement by grinding, painting, laminating or the like is more. In addition, methods are known, obtained by the surface of a panel or the like a spatial structure. So surfaces can be brushed, known for example from the WO2004 / 035263A2 in order to make the effect of a grain more pronounced, as in the case of real wood, even with wood substitute materials.

Also known is the embossing of laminates between two calender rolls to give these laminates a certain spatial pattern.

In the known methods of surface structuring surface roughnesses of about 1 mm can be achieved, through which a panel receives a regularly repeating, patterned pattern when embossing between calender rolls. However, these methods are not suitable for reproducing the naturalness of a rough bark, a wooden shingle arrangement or a comparable, natural structure.

Against this technical background, the object of the invention is to provide a method of surface structuring with which the reproduction of such pronounced, very rough and, in particular, natural structures is made possible in the case of panels, furniture panels or the like.

This technical problem is solved gem. of claim 1, by the measures that, by pressing more than three layers of veneer or the like on a press table under a structured press die, a surface texture having a roughness of more than 2 mm is achieved.

The method of the invention offers a number of advantages.

By pressing more than three layers, up to ten layers or more, preferably about eight layers, the panel is given a sufficient thickness, with three layers of about 4 mm and 8 or 9 layers of about 25 mm to the natural bumps of a bark or a comparable natural structure, down to an inch range, to reproduce.

The layers are pressed on a press table under a structured press die. This ensures that the back of the pressed, finished panel is flat, while a visible side is structured to a considerable extent. For use is preferably a hydraulic press that can easily apply the necessary pressure for a deformation in comparison to calender rolls.

For high-quality surfaces of the panels in question, furniture panels or the like is further provided that a top layer is a wood veneer and a second layer is color matched to the top layer.

In the uppermost layer is thought of a valuable real wood veneer, but also on, for example, reconstructed, multi-laminated real wood sliced veneer or the like as lakierfähige films, while the other layers are less valuable, for example. Soaked papers.

It has been shown that with a roughness of more than 2 mm, a top layer of a wood veneer can break. An arranged below it, color matched to the first layer second layer leaves such a crack close to invisible and thus not disturbing in the surface. It can further be provided that the second layer is selected darker than the first layer, which can further enhance the depth effect of the surface structure.

The method according to the invention is particularly well suited for a manual process with large panels of dimensions of about 2.50 m by 1.5 m, and therefore for panels of an area of more than 2 m ² , very well. It has proved to be useful if the layers are pre-sorted by a side table placed on the press table and while the layers are alternately provided without adhesive application and with double-sided adhesive application, to be then pressed. The ram pressure should be more than 250 kg / cm ² and be distributed as evenly as possible over several pressing cylinders of a hydraulic press on the ram.

In the mentioned size of the panels, furniture panels or the like is further preferably provided that the ram has a structure that corresponds to a natural, multiply mirrored and juxtaposed.

Such considerably simplifies the production, in particular, of a natural surface structure of the press ram, since these Surface structure in particular has no breaks, since, composed mirrored accordingly, the actually completed, natural structure continues mirror-inverted at the edges.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2004/035263 A2 [0003]

Claims (7)

Method of surface structuring of panels or the like by pressing, characterized in that by pressing more than three layers of veneer or the like on a press table under a structured press die, a surface texture of a roughness of more than 2 mm is achieved. A method according to claim 1, characterized in that a top layer is a wood veneer and that a second layer is color matched to the top layer. A method according to claim 2, characterized in that the second layer is darker than the uppermost layer. Method according to one or more of the preceding claims, characterized in that the layers are pressed alternately without adhesive application and with double-sided adhesive application. Method according to one or more of the preceding claims, characterized in that the press ram pressure is more than 250 kg / cm ² . Method according to one or more of the preceding claims, characterized in that the pressing die has a structure which corresponds to a natural, multiply mirrored and juxtaposed. Method according to one or more of the preceding claims, characterized in that the pressing punch has an area of more than 2 m ² .