WO2008065243A1

WO2008065243A1 - Process for producing a longitudinal wood composite product and a longitudinal wood composite product

Info

Publication number: WO2008065243A1
Application number: PCT/FI2007/050621
Authority: WO
Inventors: Johan Tore KARLSTRÖM; Johan Mikael KARLSTRÖM
Original assignee: Karlstroem Johan Tore; Karlstroem Johan Mikael
Priority date: 2006-11-27
Filing date: 2007-11-20
Publication date: 2008-06-05
Also published as: FI20061039A0; EP2086732A1; EP2086732A4

Abstract

The invention relates to a process for producing a wood composite product comprising a first and a second board (1, 2). One takes such a first board (1), which is sawn out of a round log (8) so that the first side edge (6) is a wane edge (9) and so that the first even face (4) has a larger area than the second even face (5), and one takes such a second board (2), which is sawn out of a round log (8) so that the third side edge (14) is a wane edge (9) and so that the third even face (12) has a larger area than the fourth even face (13). One machines the first side edge (6) in order to achieve a first longitudinal bevelled side edge fraction (11) and one machines the third side edge (14) in order to achieve a second longitudinal bevelled side edge fraction (17) for interaction with the first longitudinal bevelled side edge fraction (11). The invention also relates to a wood composite product.

Description

Process for producing a longitudinal wood composite product and a longitudinal wood composite product

Background

The invention relates to a process according to the preamble of claim 1 for producing a wood composite product, preferably a longitudinal wood composite product, consisting of a first board and a second board.

The invention also relates to a wood composite product according to the preamble of claim 19, preferably a longitudinal wood composite product, comprising a first board and a second board.

With a board is henceforth referred to a board, a longitudinal piece of wood or the equivalent.

With a wood composite product is henceforth especially, but not exclusively, referred to other equivalent wood composite products, a stud or a joist.

Traditionally round logs have been sawn into studs or joists in such a way that the round log is first sawn in the longitudinal direction of the round log in order to first obtain studs or joists with the desired thickness and in which at least one side edge is a wane edge. Thereafter the wane edge or wane edges have been sawn away in order to obtain the desired breadth of the stud or the joists.

The problem with this traditional method is that it is possible to recover a relatively small amount of fully edged studs or fully edged joists, as .for instance such studs or joists, the cross section of which measures 50 mm x 50 mm (also called "two-by-two") or 50 mm x 75 mm or 50 mm x 100 mm (also called "two-by-four") or 50 mm x 150 mm (also called "two-by-six), of a normal log using this method. This is because a round log, as known, has a round cross-section, which does not allow sawing the round log into several fully edged studs or joists. Processes have thus been developed in order to produce studs and joists more efficiently out of round logs and to achieve a better utilization rate of a round log as the round log is sawn in order to produce studs or joists.

In the publication US 781,376 there is shown a process, in which boards are jointed into a wood composite product. In the procedure a round log is first sawn into equally thick boards, showing parallel side surfaces and wane edges between the parallel side surfaces. Thereafter bark and unevenness are removed from the wane edges between the parallel edge surfaces so that the boards get the same kind of bevelled edges as the original natural inclination of the side edge. Thereafter the bevelled edges of the boards are jointed together in such a way that a larger surface of a board is turned to the same side as a smaller side surface on an adjacent board.

In the publication US 5,870,876 there is shown a process, in which boards are jointed into a wood composite product. In the procedure, longitudinal step formations are formed on the side edges of the boards and the boards are linked parallel-wise in such a way that the step formations in the board edges are jointed. In this way, a wood composite product is obtained, the cross section area of which is the sum of the cross sections of the jointed boards.

In the publication US 2006/0078704 there is shown a wood composite product comprising several profiled boards of the same thickness, which are jointed side by side in such a way that the edge surfaces of the boards are parallel. The boards are manufactured of wane timber in such a way that the wane edge has been prepared into a profiled edge, showing at least one projection and one groove.

In the publication US 2004/0074189 there is shown boards made of wooden sheets, the side edges of which are jointed. The side edges of the boards may be inclined and the inclined side edges may be equipped with tongue and groove. Short Description of the Invention The object of the present invention is to achieve a method for the production of a wood composite product and a wood composite product, which gives a high utilization of a round log.

According to the invention, the purpose is achieved using a process, which is characterised by what is expressed in independent claim 1.

Preferred embodiments of the method are presented in dependent claims 2 to 18.

The wood composite product in according to the invention is characterised by that which is presented in independent claim 19.

Preferred embodiments of the wood composite product are presented in dependent claims 20 to 33.

The invention is based upon that the side edges of the boards, which are linked together as the boards are jointed into a composite product, are wane edges, which are machined in such a way that they can be jointed.

As round logs are sawn into boards in the longitudinal direction of the round log, the result is, except for fully edged boards, also boards or only boards, which, if desired, have at least one rounded side edge, in other words a wane edge, which is a part of the originally rounded envelope surface of the round log. Since a board of this kind has a rounded side edge or two rounded side edges, a board of this kind has a first face (an upper or under face) on one side of the board, which has a larger area than the other face (the upper or under face) of the board on the opposite side of the board. By jointing two such boards according to the procedure indicated in the invention, of boards of this kind a wood composite product may be obtained, the breath of which exceeds the breath obtained by first sawing the wane edges off both boards so that, in both boards, a side edge is obtained, which is orthogonal in relation to the flat upper and under face of the board, and by then jointing the straight side edges of the boards together. In the invention, the bent wane edge in a first board, which shall be jointed to a second board, is machined to a first side edge, showing a first longitudinal contact surface and a first longitudinal bevelled side edge fraction. The bent wane edge in a second board, which shall be linked to the first board, is machined to a second side edge, showing a second longitudinal contact surface for interaction with the first longitudinal contact surface of the first board and a second longitudinal bevelled side edge fraction for interaction with the first longitudinal side edge fraction of the first board. Since in the invention a longitudinal bevelled side edge fraction is formed in the side edge of the boards, the side edges of the boards get an at least partially askew cross section. The askew cross section results in that the preferred embodiment, which the board originally had before machining of the side edge, can be substantially preserved. With this preferred embodiment design is meant that the board because of the bent wane edge originally had an under face, which had a larger area than its upper face or vice-versa. I the same way, the board, the side edge of which has been machined, has an under face, which had a larger area than its upper face or vice-versa.

As a first board and a second board are to be jointed in the procedure according to the invention, the boards are laid out alongside so that the bigger face of the first board is evenly parallel to the smaller face of the second board and in such a way that the smaller face of the first board becomes evenly parallel to the bigger face of the second board and in such a way that the interacting bevelled side edge fractions and the interacting longitudinal contact surfaces in the first and the second board are turned to face each other. Thereafter, the first side edge of the first board and the third side edge of the second board are connected in such a way that the first even face of the first board and the fourth even face of the second board together form a first even surface, which is substantially parallel to the second even surface, which is formed- by the second even face of the first board and the third even face of the second board together, and the first side edge of the first board and the third side edge of the second board are glued together in such a way that the first board and the second board form a substantially monolithic entity.

Since the bent wane edges are in the invention machined into side edges with a longitudinal contact surface and a longitudinal bevelled side edge fraction, i.e. into side edges, which at least partially have an incline in relation to the even upper and under face of the board, in the invention less of the area of the face of the first board and the face of the second board is lost, which has the larger area, and at the same time less of the cross section area of the first board and the second board in comparison to if the wane edge of the first and the second board would, for instance, be sawn straight off in order to get a side edge in the first and the second board, which is orthogonal in relation to the even upper and under face of the board. In other words, when sawing the side edges straight off, area is lost both on the under face of the first board and area on the upper face of the second board. At the same time such cross section area is unnecessarily lost in both boards, which could add to the total cross section area of the wood composite product.

Also other advantages are achieved with the invention. It is generally known to a person skilled in the art that a stud or a joist consisting of a piece, which is sawn as fully edged timber from a round log has a tendency to bend around the original heart or core of the round log. Since in the procedure according to the invention a first board is picked, which is sawn out of a round log in such a way that the first edge is a wane edge and in such a way that the first even face has a larger area than the second even face and since a second board is picked, which is sawn out of a round log in such a manner that the third side edge is a wane edge and in such a way that the third even face has a larger area than the fourth even face, this also means that the first even face of the first board has been situated closer to the heartwood of the round log than the second even face of the first board and that the third even face of the second board has been situated closer to the heartwood of the round log than the fourth even face of the second board. Since in the procedure according to the invention the first board and the second board are jointed together in such a way that the first even face of the first board and the fourth even face of the second board together form a first even surface, which is substantially parallel to the second even surface, which the second even face of the first board and the third even face of the second board form together, this accomplishes that the bending of the wood composite product at least partially is counteracted, since the bending of the first board counteracts the bending of the second board and vice-versa. In other words, in the wood composite product the face of the first board, which originally before sawing the round log was situated closer to the core or heartwood of the round log on the same side as the face of the second board, which originally before sawing the round log was farther away from the core or heartwood of the round log and since a board bends around the original core or heartwood, bending of the wood composite product can at least partially be counteracted by the invention, since the first board bends at least partially counter-clockwise around its original heartwood and since the second board bends at least partially clockwise around its original heartwood or vice-versa. The bending may be even further reduced, if the wood composite product is manufactured of boards, sawn from different trees.

In one preferred embodiment, the first longitudinal contact surface of the first side edge of the first board shows a first tongue and a first groove, and the second longitudinal contact surface of the third side edge of the second board shows a second tongue for interacting with the first groove of the first longitudinal contact surface and a second groove for interacting with the first tongue of the first longitudinal contact surface. Such an execution of the first side edge of the first board and the third side edge of the second board counteract efficiently bending of the first board and bending of the second board and bending of the first board in relation to the second board and vice- versa, since the tongues and grooves efficiently inhibit bending of the first board in relation to the second board and vice- versa. The result is a stable wood composite product that maintains its forms and dimensions. In addition, at least two tongue-and-groove combinations enable that the first board locks itself in relation to the second board in the jointing even before the glue has dried at least partially.

In another preferred embodiment_s the first longitudinal contact surface of the first side edge of the first board shows a first tongue and a second tongue and the second longitudinal contact surface of the third side edge of the second board show a first groove for interacting with the first tongue of the first longitudinal contact surface and a second groove for interacting with the second tongue of the first longitudinal contact surface.

hi one preferred embodiment, the first longitudinal contact surface of the first side edge of the first board shows a first tongue and a first groove and the second longitudinal contact surface of the third side edge of the second board shows a second tongue, which together with the first groove of the first longitudinal contact surface forms a formatting joint, and a second groove, which also, together with the first tongue of the first longitudinal contact surface, forms a formatting joint. It is extremely advantageous to use formatting tongue- and-groove combinations of this kind in such an embodiment of the procedure according to the invention, in which the first side edge of the first board and the third side edge of the second board are glued together by using a two-component glue in such a way that one of the glue components (the glue or the hardener) is applied on one of the first side edges of the first board and the third side edge of the second board and in such a way that the other glue component (the glue or the hardener) is applied on the other of the first side edges of the first board and the third side edge of the second board before jointing the first longitudinal contact surface of the first board and the second longitudinal contact surface of the second board, wherewith the glue components come into contact with each other as the first longitudinal contact surface of the first board and the second longitudinal contact surface of the other board come into contact with each other. When two-component glue is used in this way, the formatting tongue-and-groove combinations prevent the first board from moving in relation to the second board until the glue has sufficiently dried.

In another preferred embodiment, the first longitudinal contact surface in the first side edge in the first board shows a first tongue and a second tongue, and the second longitudinal contact surface in the third side edge of the second board show a first groove, which together with the first tongue of the first longitudinal contact surface forms a formatting joint, and a second groove, which together with the second tongue of the first longitudinal contact surface forms a formatting joint.

In another preferred embodiment, the first side edge of the first board and the third side edge of the second board show substantially the same dimensions and substantially the same form. In the wood composite product, the first board and the second board in this preferred embodiment have been turned in relation to each other in such a way that the first longitudinal bevelled side edge fraction of the first board lies alongside the second longitudinal bevelled side edge fraction of the second board. Since the first side edge of the first board and the third side edge of the second board are substantially of the same dimensions and substantially the same form, the wane edge of the first board and the wane edge of the second board can be machined with the same cutting tool so that the first side edge of the first board and the third side edge of the second board are substantially of the same dimensions and substantially of the same form. The invention also enables that cuneiform boards, i.e. boards with a cross section, which is larger in one end of the board than in the opposite end of the board, are jointed into a wood composite product with a uniform cross section along the entire wood composite product. A uniform cross section can also be achieved by machining the wood composite product after the jointing.

When two cuneiform boards are jointed, the two cuneiform boards are preferably, but not necessarily, turned in relation to each other in such a way that the end that has the smaller cross section of the first board gets into the same end of the wood composite product as the end that has the larger cross section area of the second board and vice versa.

List of Figures

The inventions is now described in more detail by referral to the attached figures, showing examples of preferred embodiments, and in which

Figure 1 shows an end view of how a round log can be sawn into boards and how the wane edges of the boards can be machined in order to produce for instance the longitudinal wood composite product, which is shown in Figure 6,

Figure 2 shows an end view of the round log of Figure 1 after it has been sawn into boards, showing a wane edge, which is a part of the original envelope surface of the round log,

Figure 3 shows an end view of a first board, which has a first side edge, which is a wane edge,

Figure 4 shows an end view of a second board, which has a third side edge, which is a wane edge,

Figure 5 shows and end view of a first board, which has a first side edge, which has been a wane edge, Figure 6 shows an end view of a second board, which has a third side edge, which has been a wane edge,

Figure 7 shows a first longitudinal wood composite product as an end view,

Figure 8 shows an end view of a second board, which has two wane edges,

Figure 9 shows an end view of the board in Figure 8 after machining,

Figure 10 shows an end view of a third board, which has a fifth side edge, which is a wane edge,

Figure 11 shows an end view of the third board in Figure 10 after machining,

Figure 12 shows how a round log can be sawn in order to achieve the longitudinal wood composite products shown in Figures 13, 14 and 15,

Figure 13 shows an end view of a second longitudinal wood composite product,

Figure 14 shows an end view of a third longitudinal wood composite product,

Figure 15 shows an end view of a fourth longitudinal wood composite product,

Figure 16 shows how a round log can be sawn in order to achieve the longitudinal wood composite products shown in Figures 17, 18 and 19,

Figure 17 shows an end view of a fifth longitudinal wood composite product,

Figure 18 shows an end view of a sixth longitudinal wood composite product, and

Figure 19 shows an end view of a seventh longitudinal wood composite product. Detailed Description of the Invention

The present invention relates to a process for producing a longitudinal wood composite product (not referred to by a reference number), comprising a first board 1, a piece of wood or equivalent and a second board 2, a piece of wood or equivalent. The wood composite product can also comprise a third board 3 as shown in Figures 15 to 17 or more than three boards as for instance in a laminated wood panel, comprising several boards.

In the process, a first board 1 is taken, showing a first even face 4 on one side of the first board 1 and another even face 5 on the opposite side of the first board 1 in such a way that the first even face 4 and the other even face 5 are substantially parallel, and which show a first side edge 6 between the first even face 4 and the other even face 5 and which shows a second side edge 7 on the opposite side of the first board 1 between the first even face 4 and the second even face 5.

In the process, such a first board 1 is taken, which is sawn out of a round log in such a way that the first side edge 6 is a wane edge 9 and in such a way that the first even face 4 has a larger area than the other even face 5.

In the process, the first side edge 6, i.e. the wane edge 9 of the first board 1 is machined in order to achieve a first longitudinal contact surface 10 in the first side edge 6.

In the process, the first side edge 6, i.e. the wane edge 9 of the first board 1 is also machined in order to achieve a first longitudinal bevelled side edge fraction 11 in the first side edge 6 in such a way that the first even face 4 of the first board 1 has a larger area than the other even face 5 of the first board 1.

In Figure 5 the wane edge 9 has been machined in such a way that there has been formed such a first side edge 6, which shows such a first longitudinal bevelled side edge fraction 11, which stretches only partly between the first even face 4 of the first board 1 and the other even face 5 of the first board 1. The wane edge 9 can alternatively be machined in such a way that there is formed such a first longitudinal bevelled side edge fraction 11, which stretches completely between the first even face 4 of the first board 1 and the other even face 5 of the first board 1.

In the process, a second board 2 is taken, which shows a third even face 12 on one side of the second board 2 and a fourth even face 13 on the opposite side of the second board 2, wherein the third even face 12 and the fourth even face 13 are substantially parallel and wherein the distance between the third even face 12 and the fourth even face 13 of the second board 2 substantially corresponds to the distance between the first even face 4 and the second even face 5 of the first board 1, and which shows a third side edge 14 between the third even face 12 and the fourth even face 13, and which shows a fourth side edge 15 on the opposite side of the second board 2 between the third even face 12 and the fourth even face 13.

In the process, such a second board 2 is taken, which is sawn out of a round log 8 in such a way that the third side edge 14 is a wane edge 9 and in such a way that the third even face 12 has a larger area than the fourth even face 13.

In the process, the third side edge 14, i.e. the wane edge 9 of the second board 2 is machined in order to achieve a second longitudinal contact surface 16 in the third side edge 14 for interaction with the first longitudinal contact surface 10 in the first side edge 6 of the first board 1.

More accurately, in the process the third side edge 14, i.e. the wane edge 9 of the second board 2, is machined in order to achieve a second longitudinal bevelled side edge fraction 17 in the third side edge 14 for interaction with the ^"first longitudinal bevelled side edge fraction 11 of the first board 1, wherein the third even face 12 of the second board 2 has a larger area than the fourth even face 13 of the second board 2.

In figure 6, the wane edge 9 has been machined in such a way that it forms such a third side edge 14, which shows such a second longitudinal bevelled side edge fraction 17, which stretches only partly between the third even face 12 of the second board 2 and the fourth even face of the second board 2. The wane edge 9 can alternatively be machined in such a way that such a second longitudinal bevelled side edge fraction 17 is formed, which stretches all the way between the third even face 12 of the second board 2 and the fourth even face 13 of the second board 2.

In the process, the first longitudinal contact surface 10 of the first board 1 and the second longitudinal contact surface 16 of the second board 2 are jointed in such a way that the first even face 4 of the first board 1 and the fourth even face 13 of the second board 2 together form a first even surface 18, which is substantially parallel to the second even surface 19, which the second even face 5 of the first board 1 and the third even face 12 of the second board 2 form together and in the process the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 are glued together, and in such a way that the first board 1 and the second board 2 form a substantially monolithic entity.

In the process, the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 are preferably, but not necessarily, glued together with a two-component glue (not shown in the figures) in such a way that one of the glue components (not shown in the figures) is applied on one of the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 and in such a way that the other glue component (not shown in the figures) is applied on the other of the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 before jointing the first longitudinal contact surface 10 of the first board 1 and the second longitudinal contact surface 16 of the second board 2, wherein the first glue component and the second glue component come into contact with each other as they are jointed.

In the process, the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 are preferably, but not necessarily, machined so that substantially the same form and substantially the same dimensions are achieved in the first longitudinal bevelled side edge fraction 11 of the first board 1 and the second longitudinal side edge fraction 17 of the second board 2. In the figures, the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 have been machined so that the first longitudinal side edge fraction 11 and the second longitudinal side edge fraction 17 have the same inclination and the same dimensions. In the process, the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 are preferably, but not necessarily, machined so that substantially the same form and substantially the same dimensions are achieved in the first longitudinal contact surface 10 of the first board 1 and the second longitudinal contact surface 16 of the second board 2.

In the process, the first side edge 6 of the first board 1 is preferably, but not necessarily, machined so that a first longitudinal contact surface 10, showing a first tongue 20 and a first groove 21, is achieved, and the third side edge 6 of the second board 2 so that a second longitudinal contact surface 16 is achieved, which shows a second tongue 22 for interaction with the first groove 21 of the first longitudinal contact surface 10 and a second groove 23 for interacting with the first tongue 20 of the first longitudinal contact surface 10.

In the process, the first side edge 6 of the first board 1 may be alternatively machined so that a first longitudinal contact surface 10 is achieved, showing a first tongue 20 and a second tongue 22, and the third side edge 6 of the second board 2 may be machined so that a second contact surface 16 is achieved, showing a first groove 21 for interaction with the first tongue 20 of the first longitudinal contact surface 10 and a second groove 23 for interaction with the second tongue 22 of the first longitudinal contact surface 10.

In the process, the first side edge 6 of the first board 1 is preferably, but not necessarily, machined in such a way that one achieves two first longitudinal contact surfaces 10 so that a first longitudinal contact surface 10 showing a first tongue 20 is achieved, and so that a first longitudinal contact surface 10 showing a first groove 21 is achieved and so that the first longitudinal bevelled side edge fraction 11 between the first tongue 20 and the first groove 21 is achieved. In the process, also the third side edge 14 of the second board 2 is preferably, but not necessarily, machined in such a way that one achieves two other longitudinal contact surfaces 16 in such a way that a second longitudinal contact surface 16, showing a second tongue 22, and a second longitudinal contact surface 16, showing a second groove 23, are achieved, and so that the other longitudinal bevelled side edge fraction 17 between the second tongue 22 and the second groove 23 is achieved. In the process, the first side edge 6 of the first board 1 may alternatively be machined in such a way that two first longitudinal contact surfaces 10 are achieved in such a way that a first longitudinal contact surface 10, which shows a first tongue 20, and a first longitudinal contact surface 10, which shows a second tongue 22, are achieved, and so that the first longitudinal bevelled side edge fraction 11 between the first tongue 20 and the second tongue 22 is achieved. In this alternative, also the third side edge 14 of the second board 2 is machined in such a way that two other longitudinal contact surfaces 16 are achieved in such a way that a second longitudinal contact surface 16, which shows a first groove 21, and a second longitudinal contact surface 16, which shows a second grove 23, are achieved, and so that the second longitudinal bevelled side edge fraction 17 is achieved between the first groove 21 and the second groove 23.

In the process, the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 are preferably, but not necessarily, machined so that a first tongue 20 is achieved, which together with the second groove 23 forms a formatting joint.

In the process, the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 are preferably, but not necessarily, machined so that a first groove 21 is achieved, which together with the second tongue 22 forms a formatting joint.

In the process, the first side edge 6 of the first board 1 is preferably, but not necessarily, machined in such a way that, on both sides of the first tongue 20, a first even edge area 32 is achieved, which is orthogonal in relation to the first even face 4 and the second even face 5.

In the process, the first side edge 6 of the first board 1 is preferably, but not necessarily, machined in such a way that, on both sides of the first groove 21, a second even edge area 33 is achieved, which is orthogonal in relation to the first even face 4 and the second even face 5.

In the process, the second side edge 14 of the second board 2 is preferably, but not necessarily, machined in such a way that, one on both sides of the second tongue 22, a third even edge area 34 is achieved, which is orthogonal in relation to the third even face 12 and the fourth even face 13.

In the process, the second side edge 14 of the second board 2 is preferably, but not necessarily, machined in such a way that, one on both sides of the second groove 23, a second even edge area 35 is achieved, which is orthogonal in relation to the third even face 12 and the fourth even face 13.

In the process, the first side edge 6 and the second side edge 14 of the second board 2 are preferably, but not necessarily, machined in such a way that the edge (not referred to with any reference number) between the first even face 4 of the first board 1 and the first side edge 6 of the first board 1 and the edge (not referred to by any reference number) between the fourth even face 13 of the second board 2 and third side edge 14 of the second board 2 touch.

In the process, the first side edge 6 of the first board 1 and the second side edge 14 of the second board 2 are preferably, but not necessarily, machined in such a way that the edge (not referred to by any reference number) between the second even face 5 of the first board 1 and the first side edge 6 of the first board 1 and the edge (not referred to by any reference number) between the third even face 12 of the second board 2 and the third side edge 14 of the second board 2 touch.

In the process, the first side edge 6 of the first board 2 is preferably, but not necessarily, machined and the third side edge 14 of the second board 2 is machined so that substantially the same form and substantially the same dimensions are achieved in the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2.

In the process, the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 are preferably, but not necessarily, machined with the same cutting tool (not shown in the figures). In the process, and preferably, but not necessarily, such a first board 1 is taken, which shows such a second side edge 7, which is substantially orthogonal in relation to the first even face 4 and the second even face 5.

In the process, and preferably, but not necessarily, such a second board 2 is taken, which shows such a fourth side edge 15, which is substantially orthogonal in relation to the third even face 12 and the fourth even face 13.

In the process, the first side edge 6 of the first board 1 and/or the second side edge 14 of the second board 2 are preferably, but not necessarily, machined so that when the first board 1 and the second board 2 are jointed, a space for glue (not shown in the figures) is formed between the first longitudinal bevelled side edge fraction 11 of the first board 1 and the second longitudinal bevelled side edge fraction 17 of the second board 2.

In the process, the first board 1 and the second board 2 are preferably, but not necessarily, machined after the jointing in order to achieve the preferred form and/or dimension of the wood composite product.

In the process, the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 are preferably, but not necessarily, glued together with a 2-component glue

(not shown in the figures) in such a way that one of the glue components (the glue or the hardener, not shown in the figures) is applied on one of the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 and in such a way that the other glue component (the glue or the hardener, not shown in the figures) is applied on the other of the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 before joining together the first longitudinal contact surface 10 of the first board 1 and the second longitudinal contact surface 16 of the second board 2, whereby the glue components come in contact with each other as the first longitudinal contact surface 10 of the first board 1 and the second longitudinal contact surface of the second board 2 are jointed.

With the process, more than two boards can alternatively be jointed, which has been shown in Figures 13, 14 and 15. In that case such a second board 2 is taken, which is sawn out of a round log 8 in such a way that the fourth wane edge 15, too, is a wane edge as shown in Figure 15.

Also the fourth side edge 15 of the second board 2 is machined in order to achieve a third longitudinal bevelled side edge fraction 24 in the fourth side edge 15 in such a way that the third even face 12 of the second board 2 has a larger area than the fourth even face 13 of the second board 2.

Also the fourth side edge 15 of the second board 2 is machined in order to achieve a third longitudinal contact surface 25.

A third board 3 is taken, which is sawn out of a round log in such a way that it shows a fifth even face 26 on one side of the third board 3, a sixth even face 27 on the opposite side of the third board 3, wherein the fifth even face 26 and the sixth even face 27 are substantially parallel and wherein the distance between the fifth even face 26 and the sixth even face 27 substantially correspond to the distance between the third even face 12 and the fourth even face 13 in the second board 2, and in such a way that the third board 3 shows a fifth side edge 28 between the fifth even face 26 and the sixth even face 27 and a sixth side edge 29 on the opposite side of the third board 3 between the fifth even face 26 and the sixth even face 27, wherein the fifth side edge 28 is a wane edge 9 in such a way that the fifth even face 26 has a larger area than the sixth even face 27.

The fifth side edge 28 of the third board 3 is machined in order to achieve a fourth longitudinal bevelled side edge fraction 30 for interaction with the third bevelled side edge of the second board 2, wherein the fifth even face 26 of the third board 3 has a larger area than the sixth even face 27 of the third board 3.

The fifth side edge 28 of the third board 3 is machined in order to achieve a fourth longitudinal contact surface 31 for interaction with the third longitudinal contact surface 25.

The third longitudinal contact surface 25 of the second board 2 and the fourth longitudinal contact surface 31 of the third board 3 are jointed in such a way that the third even face 12 of the second board 2 and the fifth even face 26 of the third board 3 together form a first even surface 18, which is substantially parallel to the second even surface 19, which the fourth even face 13 of the second board 2 and the sixth even face 27 of the third board 3 form together, and the fourth side edge 13 of the second board 2 and the fifth side edge 28 of the third board 3 are glued together in such a way that the first board 1 and the second board 2 and the third board 3 form a substantially monolithic entity.

In the corresponding way, than three boards may be jointed together, as for instance a first board 1 , a second board 2, a third board 3 and a fourth board (not shown) etc.

The invention also relates to a wood composite product, which comprises a first board 1 and a second board 2.

The first board 1 shows a first even face 4 on one side of the first board 1, and a second even face 5 on the opposite side of the first board 1.

The first even face 4 and the second even face 5 are substantially parallel.

The first board 1 also shows a first side edge 6 between the first even face 4 and the second even face 5.

The first board 1 also shows a second side edge 7 on the opposite side of the first board 1 between the first even face 4 and the second even face 5.

The second board 2 shows a third even face 12 on one side of the second board 2 and a fourth even face 13 on the opposite side of the second board 2.

The third even face 12 and the fourth even face 13 are substantially parallel and the distance between the third even face 12 and the fourth even face 13 substantially equals the distance between the first even face 4 and the second even face 5 of the first board 1.

The second board 2 also shows a third side edge 14 between the third even face 12 and the fourth even face 13. The second board 2 also shows a fourth side edge 15 on the opposite side of the second board 2 between the third even face 12 and the fourth even face 13.

The first side edge 6 shows a first longitudinal contact surface 10 and the third side edge 14 shows a second longitudinal contact surface 16 for interaction with the first longitudinal contact surface 10.

The first longitudinal contact surface 10 of the first board 1 and the second longitudinal contact surface 16 of the second board 2 are jointed and the first side edge 6 of the first board 1 and the third side edge 14 of the second board 2 are glued together in order to form a substantially monolithic entity of the first board 1 and the second board 2 in such a way that the first even face 4 of the first board 1 and the fourth even face 13 of the second board 2 together form a first even surface 18, which is substantially parallel to the even surface 19, which is formed by the second even face 5 of the first board 1 and the third even face 12 of the second board together.

The first board 1 is sawn out of a round log 8 in such a way that the first even face 4 of the first board 1 has a larger area than the other even face 5 of the first board 1 and in such a way that the first side edge 6 originally has been a wane edge 9.

The first side edge 6 of the first board 1 has been machined in such a way that the first side edge 6 shows a first longitudinal bevelled side edge fraction 11 between the first even face 5 and the second even face 5 in such a way that the first even face 4 of the first board 1 has a larger area than the second even face 5 of the first board 1.

In the figures the wane edge 9 has been machined, so that there has been formed such a first side edge 6, which shows such a first longitudinal bevelled side edge fraction 11, which only partly stretches between the first even face 4 of the first board 1 and the second even face 5 of the first board 1.

The wane edge 9 may alternatively be machined so that there is formed such a first longitudinal bevelled side edge fraction 11 , which stretches all the way between the first even face 4 of the first board 1 and the second even face 5 of the first board 1. The second board 2 is sawn out of a round log 8 in such a way that the third even face 12 of the second board 2 has a larger area than the fourth even face 13 of the second board 2 and in such a way that the third side edge 14 originally was a wane edge 9.

The third side edge 14 has been machined in such a way that the third side edge 14 shows a second longitudinal bevelled side edge fraction 17 between the third even face 12 and the fourth even face 13 for interaction with the first longitudinal bevelled side edge fraction 11 of the first board 1 in such a way that the third even face 12 of the second board 12 has a larger area than the fourth even face 13 of the second board 2.

In the figures the wane edge 9 has been machined so that there is formed such a second longitudinal bevelled side edge fraction 14, which shows such a second longitudinal bevelled side edge fraction 17, which stretches only partly between the third even face 12 of the second board 2 and the fourth even face 13 of the second board 2.

The wane edge 9 may alternatively be machined so that there is formed such a second longitudinal bevelled side edge fraction 17, which stretches all the way between the third even face 12 of the second board 2 and the fourth even face 13 of the second board 2.

The first longitudinal bevelled side edge fraction 11 and the second longitudinal bevelled side edge fraction 17 show preferably, but not necessarily, substantially the same dimensions and substantially the same cross section form as shown in the figures.

The first longitudinal contact surface 10 and the second longitudinal contact surface 16 show preferably, but not necessarily, substantially the same dimensions and substantially the same cross section form.

In the figures, the first longitudinal contact surface 10 shows a first tongue 20 and a first groove 21 and the second longitudinal contact surface 16 shows a second tongue 22 for interaction with the first groove 21 of the first longitudinal contact surface 10 and a second groove 23 for interaction with the first tongue 20 of the first longitudinal contact surface 10. The first tongue 20 and the first groove 21 form preferably, but not necessarily, a formatting joint. The second tongue 22 and the second groove 23 form preferably, but not necessarily, a formatting joint.

Alternatively, the first longitudinal contact surface 10 can be provided with a first tongue and a second tongue 22 and the second longitudinal contact surface 16 can be provided with a first groove 21 for interaction with the first tongue 20 of the first contact surface 10 and a second groove 23 for interaction with the second tongue 22 of the first longitudinal contact surface 10.

In the figures, the first board 1 shows two first longitudinal contact surfaces 10 in such a way that a first longitudinal contact surface 10 shows a first tongue 20 and a first longitudinal contact surface 10 shows a first groove 21 in such a way that the first longitudinal bevelled side edge fraction 11 is situated between the first tongue 20 and the first groove 21. In the figures the second board 2 shows two other longitudinal contact surfaces in such a way that a second longitudinal contact surface 16 shows a second tongue 22 and a second longitudinal contact surface 16 shows a second groove 23 in such a way that the second longitudinal side edge fraction 17 is situated between the second tongue 22 and the second groove 23.

Alternatively, the first board 1 may show two first longitudinal contact surfaces in such a way that a first longitudinal contact surface 10 shows a first tongue 20 and a first longitudinal contact surface 10 shows a second tongue 22 in such a way that the first longitudinal bevelled side edge fraction 11 is situated between the first tongue 20 and the second tongue 22 and the second board 2 can show two other longitudinal contact surfaces 16 in such a way that a second longitudinal contact surface 16 shows a first groove 21 and a second longitudinal contact surface 16 shows a second groove 23 in such a way that the second longitudinal bevelled side edge fraction 17 is situated between the first groove 21 and the second groove 23.

The first side edge 6 of the first board 1 shows preferably, but not necessarily, on both sides of the first tongue 20 a first even edge area 32, which is orthogonal in relation to the first even face 4 and the second even face 5. The first side edge 6 of the first board 1 shows preferably, but not necessarily, on both sides of the first groove 21 a second even edge area 33, which is orthogonal in relation to the first even face 4 and the second face 5.

The second side edge 14 of the second board 2 shows preferably, but not necessarily, on both sides of the second tongue 22 a third even edge area 34, which is orthogonal in relation to the first even face 4 and the second even face 5.

The other side edge 14 of the second board 2 shows preferably, but necessarily, on both sides of the second groove 23 a fourth even edge area 35, which is orthogonal in relation to the first even face 4 and the other even face 5.

In Figure 2 the second side edge 7 of the first board 1 is substantially even and stretches substantially perpendicularly in relation to the first even face 4 and the second even face 5.

In Figure 3 the fourth side edge 15 of the second board 2 is substantially even and stretches substantially perpendicularly in relation to the third even face 12 and the fourth even face 13.

In the figures the edge between the first even face 4 of the first board 1 and the first side edge 6 of the first board 1 and the edge between the third even face 12 of the second board 2 and the third side edge 14 of the second board 2 touch. In the figures the edge between the second even face 5 of the first board 1 and the first side edge 6 of the first board 1 and the edge between the fourth even face 13 of the second board 2 and the third side edge 14 of the second board 2 also touch.

The first longitudinal bevelled side edge fraction 11 of the first board 1 and/or the second longitudinal bevelled side edge fraction 17 of the second board 2 are preferably, but not necessarily, formed and dimensioned in such a way that when the first board 1 and the second board 2 are jointed, there has been formed a space for glue between the first longitudinal bevelled side edge fraction 11 of board 1 and the second longitudinal bevelled side edge fraction 17 of the second board 2. The figures 15 and 16 show a wood composite product comprising a first board 1, a second board 2 and a third board 3.

In the figures, the second board 2 is sawn out of a round log 8 in such a way that even the fourth side edge 15 originally has been a wane edge 9.

The fourth side edge 15 in the second board 2 has been machined in such a way that the fourth side edge 15 shows a third longitudinal bevelled side edge fraction 24 and in such a way that the fourth side edge 15 shows a third longitudinal contact surface 25.

The third board 3 shows a fifth even face 26 on one side of the third board 3 and a sixth even face 27 on the opposite side of the third board 3. The fifth even face 26 and the sixth even face 27 are substantially parallel.

The third board 3 shows also a fifth side edge 28 between the fifth even face 26 and the sixth even face 27 and a sixth side edge 29 on the opposite side of the third board 3 between the fifth even face 26 and the sixth even face 27.

The third board 3 is sawn out of a round log 8 in such a way that the fifth even face 26 of the third board 3 originally has had a larger area than the sixth even face 27 of the third board 3 and in such a way that the fifth side edge 28 originally is a wane edge 9.

The fifth side edge 28 has been machined is such a way that the fifth side edge 28 shows a fourth longitudinal bevelled side edge fraction 30 for interaction with the third longitudinal bevelled side edge fraction 24 of the second board 2 and in such a way that the fifth even face 26 of the third board 3 has a larger area than the sixth even face 27 of the third board 3 and in such a way that the fifth side edge 28 shows a fourth longitudinal contact surface 31 for interaction with the third longitudinal contact surface 25 of the second board 2.

The third longitudinal contact surface 25 of the second board 2 and the fourth longitudinal contact surface 31 of the third board 3 are jointed and the fourth side edge 13 of the second board 2 and the fifth side edge 28 of the third board 3 are glued together in order to form a substantially monolithic entity of the first board 1, the second board 2 and the third board 3 in such a way that the first even face 4 of the first board 1, the fourth even face 13 of the second board 2 and the fifth even face 26 of the third board 3 together form an even surface, which is substantially parallel to the even surface that the even face 5 of the first board 1, the third even face 12 of the second board 2 and the sixth even face 27 of the third board 3 form together.

The wood composite product may be machined after jointing in order to obtain its final form.

For a person skilled in the art, it is clear that the invention can be implemented in many different ways along with the technical development. The invention and its embodiments are therefore not limited to the examples described above, but the invention and its embodiments may vary within the scope of the claims.

Claims

1. An process for producing a wood composite product, preferably a longitudinal wood composite product comprising a first board (1) and a second board (2), in which process

a first board (1) is taken, showing a first even face (4) on one side of the first board (1), a second even face (5) on the opposite side of the first board (1), wherein the first even face (4) and the second even face (5) are substantially parallel, a first side edge (6) between the first even face (4) and the second even face (5), and a second side edge (7) on the opposite side of the first board (1) between the first even face (4) and the second even face (5),

a second board (2) is taken, showing a third even face (12) on one side of the second board (2) and a fourth even face (13) on the opposite side of the other board (2), wherein the third even face (12) and the fourth even face (13) are substantially parallel and wherein the distance between the third even face (12) and the fourth even face (13) substantially corresponds to the distance between the first even face (4) and the second even face (5) of the first board (1), a third side edge (14) between the third even face (12) and the fourth even face (13), and a fourth side edge (15) on the opposite side of the second board (2) between the third even face (12) and the fourth even face (13),

the first side edge (6) of the first board (1) is machined in order to achieve a first longitudinal contact surface (10) in the first side edge (6),

the third side edge (14) of the second board (2) is machined in order to achieve a second longitudinal contact surface (16) in the third side edge (14) for interacting with the first longitudinal contact surface (10),

the first longitudinal contact surface (10) of the first board (1) and the second longitudinal contact surface (16) of the second board (2) are jointed in such a way that the first even face (4) of the first board (1) and the fourth even face (13) of the second board (2) together form a first even surface (18), which is substantially parallel to the second even surface (19), which the second even face (5) of the first board (1) and the third even face (12) of the second board (2) form together, and the first side edge (6) of the first board (1) and the third side edge (14) of the second board (2) are glued together in such a way that the first board (1) and the second board (2) form a substantially monolithic entity,

characterised by the following steps:

such a first board (1) is taken, which is sawn out of a round log (8) in such a way that the first side edge (6) is a wane edge (9) and in such a way that the first even face (4) has a larger area than the second even face (5),

such a second board (2) is taken, which is sawn out of a round log (8) in such a way that the third side edge (14) is a wane edge (9) and in such a way that the third even face (12) has a larger area than the fourth even face (13),

the first side edge (6) of the first board (1) is machined in order to achieve a first longitudinal bevelled side edge fraction (11) in the first side edge (6) between the first even face (4) and the second even face (5) of the first board (1) in such a way that the first even face (4) of the first board (1) has a larger area than the second even face (5) of the first board (1), and

the third side edge (14) of the second board (2) is machined in order to achieve a second longitudinal bevelled side edge fraction (17) in the third side edge (14) between the third even face (12) and the fourth even face (13) of the second board (2) for interaction with the first longitudinal bevelled side edge fraction (11) of the first board (1), wherein the third even face (12) of the second board (2) has a larger area than the fourth even face (13) of the second board (2).

2. A process according to claim 1, characterised in that the first side edge (6) of the first board (1) is machined and that the third side edge (14) of the second board (2) is machined so that substantially the same form and substantially the same dimensions are achieved in the first longitudinal bevelled side edge fraction (11) of the first board (1) and the second longitudinal side edge fraction ( 17) of the second board (2).

3. A process according to claim 1 or 2, characterised in that the first side edge (6) of the first board (1) is machined and that the third side edge (14) of the second board (2) is machined so that substantially the same form and substantially the same dimensions are achieved in the first longitudinal contact surface (10) of the first board (1) and the second longitudinal contact surface (16) of the second board (2).

4. A process according to any one of claims 1 to 3, characterised in

the first side edge (6) of the first board (1) is machined so that a first longitudinal contact surface (10) showing a first tongue (20) and a first groove (21) is achieved, and

that the third side edge (14) of the second board (2) is machined so that a second longitudinal contact surface (16) showing a second tongue (22) for interacting with the first groove (21) of the first contact surface and a second groove (23) for interacting with the first tongue (20) of the first longitudinal contact surface (10) are achieved.

5. A process according to claim 4, characterised in

that the first side edge (6) of the first board (1) is machined so that two first longitudinal contact surfaces (10) are achieved in such a way that a first longitudinal contact surface

(10) showing a first tongue (20) and a first longitudinal contact surface (10) showing a first groove (21) are achieved and so that the first longitudinal bevelled side edge fraction

(11) is achieved between the first tongue (20) and the first groove (21), and

that the third side edge (14) of the second board (2) is machined in such a way that two second longitudinal contact surfaces (16) are achieved in such a way that a second longitudinal contact surface (16) showing a second tongue (22) and a second longitudinal contact surface (16) showing a second groove (23) are achieved and so that the second longitudinal bevelled side edge fraction (17) between the second tongue (22) and the second groove (23) is achieved.

6. A process according to claim 4 or 5, characterised in that the first side edge (6) of the first board (1) is machined in such a way that, on both sides of the first tongue (20), a first even edge area (32) is achieved, which is orthogonal in relation to the first even face (4) and the second even face (5),

that the first side edge (6) of the first board (1) is machined in such a way that one, on both sides of the first groove (21), a second even edge area (33) is achieved, which is orthogonal in relation to the first even face (4) and the second even face (5),

that the second side edge (14) of the second board (2) is machined in such a way that, on both sides of the second tongue (22), a third even edge area (34) is achieved, which is orthogonal in relation to the third even face (12) and the fourth even face (13), and

that the second side edge (14) of the second board (2) is machined in such a way that on both sides of the second groove (23) a second even edge area (35) is achieved, which is orthogonal in relation to the third even face (12) and the fourth even face (13).

7. A process according to any one of claims 4 to 6, characterised in that the first side edge (6) of the first board (1) and the third side edge (14) of the second board (2) are machined so that a first tongue (20) is achieved, which together with the second groove (23) forms a formatting joint.

8. A process according to any one of claims 4 to 7, characterised in that the first side edge (6) of the first board (1) and the third side edge (14) of the second board (2) are machined so that a first groove (21) is achieved, which together with the second tongue (22) forms a formatting joint.

9. A process according to any one of claims 1 to 8, characterised in that the first side edge (6) of the first board (1) is machined and that the second side edge (14) of the second board (2) is machined in such a way that the edge between the first even face (4) of the first board (1) and the first side edge (6) of the first board (1) and the edge between the fourth even face (13) of the second board (2) and the third side edge (14) of the second board (2) touch each other.

10. A process according to any one of claims 1 to 9, characterised in that the first side edge (6) of the first board (1) is machined and that the second side edge (14) of the second board (2) is machined in such a way that the edge between the second even face (5) of the first board (1) and the first side edge (6) of the first board (1) and the edge between the third even face (12) of the second board (2) and the third side edge (14) of the second board (2) touch each other.

11. A process according to any one of claims 1 to 10, characterised in that such a first board (1) is taken, which shows such a second side edge (7), which is substantially orthogonal to the first even face (4) and the second even face (5).

12. A process according to any one of claims 1 to 11, characterised in that such a second board (2) is taken, which shows such a fourth side edge (15), which is substantially orthogonal to the third even face (12) and the fourth even face (13).

13. A process according to any one of claims 1 to 12, characterised in that the first side edge (6) of the first board (1) is machined and/or that the third side edge (14) of the second board (2) is machined so that when the first board (1) and the second board (2) are jointed, a space for glue is formed between the first longitudinal bevelled side edge fraction (11) of the first board (1) and the second longitudinal bevelled side edge fraction (17) of the second board (2).

14. A process according to any one of claims 1 to 13, characterised in that the first side edge (6) of the first board (1) is machined and that the third side edge (14) of the second board (2) is machined so that substantially the same form and substantially the same dimensions in the first side edge (6) of the first board (1) and the third side edge (14) of the second board (2) are obtained.

15. A process according to any one of claims 1 to 14, characterised in that the first side edge (6) of the first board (1) and the third side edge (14) of the second board (2) are machined with the same cutting tool.

16. A process according to any one of claims 1 to 15, characterised in that the first side edge (6) of the first board (1) and the third side edge (14) of the second board (2) are glued together with a two-component glue in such a way that one of the glue components is applied on one of the first side edge (6) of the first board (1) and the third side edge (14) of the other board (2) and in such a way that the other glue component is applied on the other of the first side edge (6) of the first board (1) and the third side edge (14) of the second board (2) before the jointing of the first longitudinal contact surface (10) of the first board (1) and the second longitudinal contact surface (16) of the second board (2), wherein the glue components come in contact with each other as the first longitudinal contact surface (10) of the first board (1) and the second longitudinal contact surface of the second board (2) are jointed.

17. A process according to any one of claims 1 to 16, characterised in

that such a second board (2) is taken, which is sawn out of a round log (8) in such a way that the fourth side edge (15) also is a wane edge (9),

that the fourth side edge (15) of the second board (2) is machined in order to achieve a third longitudinal side edge fraction (24) in the fourth side edge (15) in such a way that the third even face (12) of the second board (2) has a larger area than the fourth even face (13) in the second board (2),

that the fourth side edge (15) of the second board (2) is machined in order to achieve a third longitudinal contact surface (25),

that a third board (3) is taken, which is sawn out of a round log (8) in such a way that it shows a fifth even face (26) on one side of the third board (3), a sixth even face (27) on the opposite side of the third board (3), wherein the fifth even face (26) and the sixth even face (27) are substantially parallel and wherein the distance between the fifth even face (26) and the sixth even face (27) substantially corresponds to the distance between the third even face (12) and the fourth even face (13) in the second board (2), a fifth side edge

(28) between the fifth even face (26) and the sixth even face (27), and a sixth side edge

(29) on the opposite side of the third board (3) between the fifth even face (26) and the sixth even face (27), wherein the fifth side edge (28) is a wane edge (9) in such a way that the fifth even face (26) has a larger area than the sixth even face (27),

the fifth side edge (28) of the third board (3) is machined in order to achieve a fourth longitudinal bevelled side edge fraction (30) for interacting with the third longitudinal bevelled side edge fraction (24) of the second board (2), wherein the fifth even face (26) of the third board (3) has a larger area than the sixth even face (27) of the third board (3),

the fifth side edge (28) of the third board (3) is machined in order to achieve a fourth longitudinal contact surface (31) for interaction with the third longitudinal contact surface (25) of the second board (2),

that the third longitudinal contact surface (25) of the second board (2) and the fourth longitudinal contact surface (31) of the third board (3) are jointed in such a way that the third even face (12) of the second board (2) and the fifth even face (26) of the third board

(3) together form a first even surface (18), which is substantially parallel to the second even surface (19), which the fourth even face (13) of the second board (2) and the sixth even face (27) of the third board (3) form together, and the fourth side edge (13) of the second board (2) and the fifth side edge (28) of the third board (3) are glued together in such a way that the first board (1) and the second board (2) and the third board (3) form a substantially monolithic entity.

18. A process according to any one of claims 1 to 17, characterised in that the wood composite product is machined after the jointing in order to achieve its final form.

19. A wood composite product, preferably a longitudinal wood composite product comprising a first board (1) and a second board (2),

wherein the first board (1) shows a first even face (4) on one side of the first board (1), a second even face (5) on the opposite side of the first board (1), wherein the first even face

(4) and the second even face (5) are substantially parallel, a first side edge (6) between the first even face (4) and the second even face (5), and a second side edge (6) on the opposite side of the first board (1) between the first even face (4) and the second even face (5), wherein the second board (2) shows a third even face (12) on one side of the second board (2) and a fourth even face (13) on the opposite side of the second board (2), wherein the third even face (12) and the fourth even face (13) are substantially parallel and wherein the distance between the third even face (12) and the fourth even face (13) in the second board (2) substantially corresponds to the distance between the first even face (4) and the second even face (5) in the first board (1), a third side edge (14) between the third even face (12) and the fourth even face (13) and a fourth side edge (15) on the opposite side of the second board (2) between the third even face (12) and the fourth even face (13),

wherein the first side edge (6) shows a first longitudinal contact surface (10),

wherein the third side edge (14) shows a second longitudinal contact surface (16) for interaction with the first longitudinal contact surface (10),

wherein the first longitudinal contact surface (10) of the first board (1) and the second longitudinal contact surface (16) of the second board (2) are jointed and the first side edge (6) of the first board (1) and the third side edge (14) of the second board are glued together in order to form a substantially monolithic entity of the first board (1) and the second board (2) in such a way that the first even face (4) of the first board (1) and the fourth even face (13) of the second board (2) together form a first even surface (18), which is substantially parallel to the second even surface (19), which the second even face (5) of the first board (1) and the third even face (12) of the second board (2) form together,

characterised in

that the first board (1) is sawn out of a round log (8) in such a way that the first even face (4) in the first board (1) has a larger area than the second even face (5) in the first board (1) and that the first side edge (6) originally is a wane edge (9),

that the first side edge (6) has been machined in such a way that the first side edge (6) shows a first longitudinal side edge fraction (11) between the first even face (4) and the second even face (5) in such a way that the first even face (4) in the first board (1) has a larger area than the second even face (5) in the first board (1), that the second board (2) is sawn out of a round log (8) in such a way that the third even face (12) in the second board (2) has a larger area than the fourth even face (13) in the second board (2) and that the third side edge (14) originally is a wane edge (9), and

that the third side edge (14) has been machined in such a way that the third side edge (14) shows a second longitudinal bevelled side edge fraction (17) between the third even face (12) and the fourth even face (13) for interaction with the first longitudinal bevelled side edge fraction of the first board (1) in such a way that the third even face (12) in the second board (2) has a larger area than the fourth even face (13) in the second board (2).

20. A wood composite product according to claim 19, characterised in that the first longitudinal bevelled side edge fraction (11) and the second longitudinal bevelled side edge fraction (17) show substantially the same dimensions and substantially the same form.

21. A wood composite product according to claim 19 or 20, characterised by that the first longitudinal contact surface (10) and the second longitudinal contact surface (16) show substantially the same dimensions and substantially the same form.

22. A wood composite product according to any one of claims 19 to 21, characterised in

that the first longitudinal contact surface (10) shows a first tongue (20) and a first groove

(21), and

that the second longitudinal contact surface (16)- shows a second tongue (22) for interacting with the first groove (21) of the first longitudinal contact surface (10) and a second groove (23) for interacting with the first tongue (20) of the first longitudinal contact surface (10).

23. A wood composite product according to claim 22, characterised in that the first board (1) shows two first longitudinal contact surfaces (10) in such a way that a first longitudinal contact surface (10) shows a first tongue (20) and a first longitudinal contact surface (10) shows a first groove (21) and that the first longitudinal bevelled side edge fraction (11) is situated between the first tongue (20) and the first groove (21), and

that the second board (2) shows two other longitudinal contact surfaces (16) in such a way that a second longitudinal contact surface (16) shows a second tongue (22) and a second longitudinal contact surface (16) shows a second groove (23) and that the second longitudinal bevelled side edge fraction (17) is situated between the second tongue (22) and the second groove (23).

24. A wood composite product according to claim 22 or 23, characterised in

that the first side edge (6) of the first board (1) on both sides of the first tongue (20) shows a first even edge area (32), which is orthogonal in relation to the first even face (4) and the second even face (5),

that the first side edge (6) of the first board (1) on both sides of the first groove (21) shows a second even edge area (33), which is orthogonal in relation to the first even face (4) and the second even face (5),

that the second side edge (14) in the second board (2) on both sides of the second tongue

(22) shows a third even edge area (34), which is orthogonal in relation to the third even face (12) and the fourth even face (13), and

that the second side edge (14) in the second board (2) on both sides of the second groove

(23) shows a second even edge area (35), which is orthogonal in relation to the third even face (12) and the fourth even face (13).

25. A wood composite product according to any one of claims 19 to 24, characterised in that the first tongue (20) together with the second groove (23) forms a formatting joint.

26. A wood composite product according to any one of claims 19 to 25, characterised in that the first groove (21) together with the second tongue (22) forms a formatting joint.

27. A wood composite product according to any one of claims 19 to 26, characterised in that the second side edge (7) in the first board (1) is substantially even and stretches substantially perpendicularly in relation to the first even face (4) and the second even face (5).

28. A wood composite product according to any one of claims 19 to 27, characterised in that the fourth side edge (15) of the second board (2) is substantially even and stretches substantially perpendicularly in relation to the third even surface (12) and the fourth even surface (13).

29. A wood composite product according to any one of claims 19 to 28, characterised in

that the edge between the first even face (4) of the first board (1) and the first side edge (6) of the first board (1) and the edge between the fourth even face (13) of the second board (2) and the third side edge (14) of the second board (2) touch, and

that the edge between the second even face (5) of the first board (1) and the first side edge (6) of the first board (1) and the edge between the third even face (12) of the second board (2) and the third side edge (14) of the second board (2) touch.

30. A wood composite product according to any one of claims 19 to 29, characterised in that the first longitudinal bevelled side edge fraction (11) of the first board (1) and the second longitudinal bevelled side edge fraction (17) of the second board (2) are formed and dimensioned so that when the first board (1) and the second board (2) are jointed, there is formed a space for glue between the first longitudinal bevelled side edge fraction (11) of the first board (1) and the second longitudinal bevelled side edge fraction (17) of the second board (2).

31. A wood composite product according to any one of claims 19 to 30, characterised in that the first side edge (6) in the first board (1) and the third side edge (14) in the second board (2) show substantially the same dimensions and substantially the same form.

32. A wood composite product according to any one of claims 19 to 31, characterised in

that the second board (2) is sawn out of a round log (8) in such a way that the fourth side edge (15) also originally has been a wane edge (9),

that the fourth side edge (15) has been machined in such a way that the fourth side edge (15) shows a third longitudinal bevelled side edge fraction (24),

that the fourth side edge (15) has been machined in such a way that the fourth side edge (15) shows a third longitudinal contact surface (25),

that it also comprises a third board (3), which shows a fifth even face (26) on one side of the third board (3), a sixth even face (27) on the opposite side of the third board (3), wherein the fifth even face (26) and the sixth even face (27) are substantially parallel and wherein the distance between the fifth even face (26) and the sixth even face (27) substantially correspond to the distance between the third even face (12) and the fourth even face (13) in the second board (2), a fifth side edge (28) between the fifth even face (26) and the sixth even face (27), and a sixth side edge (29) on the opposite side of the third board (3) between the fifth even face (26) and the sixth even face (27),

that the third board (3) is sawn out of a round log (8) in such a way that the fifth even face (26) in the third board (3) has a larger area than the sixth even face (27) in the third board (3) and that the fifth side edge (28) originally is a wane edge (9),

that the fifth side edge (28) has been machined in such a way that the fifth side edge (28) shows a fourth longitudinal bevelled side edge fraction (30) for interaction with the third longitudinal bevelled side edge fraction (24) of the second board (2) in such a way that the fifth even face (26) in the third board (3) has a larger area than the sixth even face (27) in the third board (3),

that the fifth side edge (28) has been machined in such a way that the fifth side edge (28) shows a fourth longitudinal contact surface (31) for interaction with the third longitudinal contact surface (24), and

that the third longitudinal contact surface (24) of the second board (2) and the fourth longitudinal contact surface (31) of the third board (3) are jointed and that the fourth side edge (13) of the second board (2) and the fifth side edge (28) of the third board (3) are glued together in order to form a substantially monolithic entity of the second board (2) and the third board (3) in such a way that the third even face (12) of the second board (2) and the fifth even face (26) of the third board (3) together form a first even surface (18), which is substantially parallel to the second even surface (19), which the fourth even face (13) of the second board (2) and the sixth even face (27) of the third board form together.

33. A wood composite product according to any one of claims 19 to 32, characterised in that that the wood composite product is machined after the jointing in order to achieve its form.