DE202009002788U1 - Building board with cover layers and a core layer of wood - Google Patents

Abstract

Building board with two mutually spaced, mutually parallel cover layers (1, 2), which are fixedly connected to a single-layer or multi-layer core layer (3) made of wood, wherein the core layer by mutually parallel saw cuts (4) contains cavities formed, characterized in that the core layer (3) is formed of wood fiber direction (P) oriented side by side sections (5) of two glued or glued board layers (6, 7), the board layers on the glued or glued together sides at an angle of 30 ° up to 85 ° to the wood fiber direction parallel saw cuts (4) of lesser depth than the board layer thickness, and wherein the orientation of the glued together board layers facing each other Sägeschnitte (4) in one Brettlage and in the other Brettlage substantially symmetrical to the wood fiber direction (P ), and finally the glue joints (8) in the nebeneinande r laid board layer sections (5) perpendicular to the planes of the cover layers (1, 2) are oriented.

Description

The Innovation concerns a building board with two at a distance from each other lying, parallel to each other cover layers, with a single layer or multilayer core layer of wood, wherein the core layer by parallel saw cuts contains formed cavities.

Building panels of this type are known, for example, from the published international patent application WO 2007/048149 A1 known. Also possessed Holzbauelemente after the German utility model G 94 08 382.7 multilayer core layers in which cavities formed by mutually parallel saw cuts are produced.

The The present innovation has the goal of a building board with the features the preamble of the appended protection claim 1 in such a way that the core layer comparatively simple and with a comparatively low mechanical complexity can be produced, the Building panel due to the design of the core layer a very uniform has mechanical behavior. A weight reduction should with satisfactory mechanical strength within wide limits be enabled.

This Target is renewal by a building board achieved with the features of the appended claim 1.

significant is in such a building board, that despite a different Orientation of the course of the cavities in the core layer this uniformly an orientation of the wood fibers their individual Has components that are always in a direction parallel to the main plane of the building board or to the layers of the outer layers is.

The Choice of the orientation of the saw cuts at an angle to each other symmetrical to the wood fiber direction in a board situation and in the other board position can be used to adjust the flexural strength of the building board be used with reference to certain bending axes.

advantageous Refinements and developments of the building board according to claim 1 are the subject of this claim subordinate claims, their contents are hereby expressly part of the Description is made without the wording at this point to repeat.

A Embodiment of the structural panel proposed here is in the following with reference to the drawings explained. In this represent:

1 a perspective view of a single board layer for producing the core layer of a building board according to an embodiment of the invention;

2 a perspective view of two mutually glued board layers according to 1 , wherein it is indicated, in which way sections for producing the core layer are to be separated from the mutually glued board layers; and

3 an exploded perspective view of a construction board according to the invention.

1 shows a longitudinal section of a wooden board, the wood fiber profile is indicated by the double arrow P. In the wooden board are mutually parallel saw cuts 4 formed, which end at a depth less than the dimension of the board thickness and which have a longitudinal course, which forms an angle of, for example, about 45 ° degrees to the wood fiber direction P.

In the manufacture of a building board of the type proposed here, two boards are the in 1 shown, with the saw cuts 4 provided form as board layers 6 and 7 with facing openings of the saw cuts 4 glued together like this 2 is apparent. From this drawing figure it can be seen that the wood fiber direction P in both board layers 6 and 7 is the same, but that the orientation of the saw cuts 4 in the upper board position 6 deviates from the latter to one side relative to the wood fiber direction P and deviates symmetrically toward the other side in the other board layer relative to the wood fiber direction. In the chosen example of a deviation of 45 ° degrees of the orientation of the saw cuts relative to the wood fiber direction P then form after the glued or glued together board layers 7 the saw cuts 4 in the lower board position 7 an angle of 90 degrees with respect to the course of the saw cuts 4 in the upper board position 6 ,

Is the manufacturing state according to 2 achieved, so are from the glued together board layers 6 and 7 in wood fiber direction oriented sections 5 separated, as at S in 2 is indicated. These sections 5 serve in the finished building board as the core layer or core layer layer, wherein the adhesive joints or glue joints 8th as part of the glue joint or glue joint between the board layers 6 and 7 finally in the finished building board perpendicular to the plane of the building board or perpendicular to the planes of the outer layers 1 and 2 are oriented, like this 3 evident.

3 shows in perspective exploded Illustration of a construction board according to the invention in the cutout in the region of a single section piece, which with 5 is designated, with practically a building board after 3 in a single-layer design, a plurality of juxtaposed sections 5 and in multilayer design a variety of juxtaposed and superimposed sections 5 contains. Anyway, in all sections 5 the wood fiber direction P is consistent within the core layer of a building board.

An advantage of a core layer 3 with the structure described above is that on the surfaces of the core layer 3 at which these with the cover layers 1 and 2 is to be glued or glued, which is parallel to the plane of the cover layers wood fiber direction available, which also presents itself on two side edges of the building board. In the area of these surfaces, a very simple and secure gluing can be made to the conditions in which end grain or obliquely to the glue line ausspründende wood fibers.

It should be noted that in the production of saw cuts 4 due to the course of the saw cuts at an angle to the wood fiber direction and not parallel to the wood fiber direction a lower tool stress is given for the construction board according to the innovation, so that the production of the building board is simplified and cheaper.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - WO 2007/048149 A1 [0002]
• DE 9408382 U [0002]

Claims (5)

Building board with two spaced-apart, mutually parallel outer layers ( 1 . 2 ) with a single-layer or multi-layer core layer ( 3 ) are made of wood, wherein the core layer by parallel guided Sägeschnitte ( 4 ) formed cavities, characterized in that the core layer ( 3 ) of wood fiber direction (P) oriented juxtaposed sections ( 5 ) of two glued or glued board layers ( 6 . 7 ), wherein the board layers on the zusammengeleimten or glued together sides at an angle of 30 ° to 85 ° to the wood grain direction parallel saw cuts ( 4 ) of lesser depth than the board layer thickness, and wherein the orientation of the in the glued board layers facing each other Sägeschnitte ( 4 ) in one board layer and in the other board layer is substantially symmetrical to the wood fiber direction (P), and finally the glue joints ( 8th ) in the adjacent board layer sections ( 5 ) perpendicular to the planes of the cover layers ( 1 . 2 ) are oriented. Building board according to claim 1, characterized in that the core layer ( 3 ) of several, glued together layers of adjacent board layer sections ( 5 ) whose glue joints ( 8th ) all perpendicular to the planes of the outer layers ( 1 . 2 ) are oriented. Building panel according to claim 1 or 2, characterized in that the cover layers ( 1 . 2 ) are made of plywood. Building panel according to claim 1 or 2, characterized in that the cover layers ( 1 . 2 ) are made of laminated boards. Building board according to one of claims 1 to 4, characterized in that the orientation of the saw cuts ( 4 ) is set relative to the wood fiber direction (P) according to predetermined bending strength values of the building panel.