EP2914786A1

EP2914786A1 - Composite wood panel

Info

Publication number: EP2914786A1
Application number: EP13788929.1A
Authority: EP
Inventors: Hans-Peter Leitinger; Sebastian Leitinger
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-05
Filing date: 2013-10-31
Publication date: 2015-09-09
Also published as: WO2014068039A1; AT13575U1

Abstract

A multilayered composite wood panel (1, 11) comprising two cover panels (2), wherein the cover panels (2) are each provided with movement grooves (6) on their inner surfaces (4), which are located on the inside of the composite assembly. The cover panels (2) here are produced from lateral boards (20), lateral longitudinal connecting profiles (22) being arranged on each of the longitudinal narrow sides thereof. Also specified are multilayered composite wood panels (11) comprising at least one central-layer panel (12), which is arranged between the cover panels (2), and variants for producing the same.

Description

Wood composite board

The invention relates to a multilayer wood composite panel with the features of

Preamble of claim 1.

Different embodiments of wood composite panels have long been known from the prior art. For example, composite panels made of cross-laminated timber, or BSP for short, are used as the wood material. Such BSP plates usually consist of at least three, usually perpendicularly bonded together layers of board or lumber, the individual boards along their narrow sides are arranged without or with scheduled lateral distance from each other. Cross laminated timber is currently exclusively made

Softwood made. Individual layers may also be replaced by other wood-based materials such as chipboard (OSB boards) or laminated veneer lumber or by gypsum building materials. Cross laminated timber is occasionally also sold under the name Cross Laminated Timber, CLT for short.

Due to the crosswise offset structure of adjacent layers to each other

Cross laminated timber elements are very dimensionally stable and loads can be transmitted both longitudinally and transversely to the main direction of support. Furthermore, such BSP panels offer the advantage that, due to the crosswise construction of the multiple layers with intermediate barrier layers arranged at an angular offset, the wood composite swells or shrinks less than is the case with solid wood structural components of comparable wall thickness. This is particularly advantageous in wooden components with a large wall thickness, for example, when wooden beams are arranged in block house parallel construction side by side. In contrast to

Solid wood parts are BSP plates with CNC milling machined dimensionally stable, which represents an additional advantage of such composite panels. Thus, in the

Structural timber construction, for example, wall or ceiling panels made of BSP panels with machining steps corresponding prefabricated and installed at construction sites in place without deviations.

However, cracks due to insufficiently dried raw materials frequently occur in BSP boards. The raw wood used for the production of BSP boards is usually dried to a moisture content of 15 to 18 weight and processed with this moisture to the BSP boards. By subsequent further drying of BSP plates arise often later cracks, which can lead to construction defects in the installed state of the BSP plates.

A disadvantage is thus not economically obtainable at currently available on the market BSP plates with a greater total thickness of the composite plate low initial moisture. Furthermore, it is usually not possible to dry conventional BSP plates without cracking.

From the documents EP 0 921 249 A2 and DE 196 04 433 AI laminated wood panels are known, each consisting of several layers of wood, wherein the boards of a wood layer are glued together along abutting surfaces each to a wooden plate. These wood panels each have in the longitudinal direction of the board extending cracking points or grooves, which glue the cracking of the crosswise with each other in several layers

To reduce wood panels. A disadvantage of these embodiments, however, is at least that the grooves are arranged only in the already pre-dried state of the boards and that it comes in moisture fluctuations to arching or bowls of glued to wood panels boards. For example, document EP 0 921 249 A2 mentions that predetermined crack sites between the juxtaposed boards of a wood ply are also deliberately achieved in that the abutting surfaces of the glue joints between the boards are glued together only in sections. Thus, it is accepted in this embodiment that the glue joints even at voltages or

Humidity fluctuations break, which reduces the strength of the plywood boards.

It is therefore the object of the present invention to provide a multi-layer wood composite board, which avoids the disadvantages of the prior art and which remains largely stable even with moisture fluctuations and crack-free.

This object is achieved with a multilayer wood composite panel according to the preamble of claim 1 with the features of the characterizing part of claim 1. The subclaims relate to further particularly advantageous embodiments of the invention.

In a multilayer composite wood panel according to the invention, which comprises two cover plates, the cover plates are each provided with movement grooves on their inner surfaces, which are located inside the composite, and the cover plates are made of side boards

Longitudinal narrow sides each side longitudinal connection profiles are arranged prepared.

Due to the movement of grooves on the inner surfaces of the cover plates stresses in the plates due to temperature fluctuations or during drying clearly reduces and unwanted cracking is thus prevented. Wood composite boards according to the invention can thus be dried particularly economically to a low target moisture content, for example of around 10% moisture. Humidity fluctuations between an average humidity of about 13% during the summer months and of about 7% humidity in the winter can thus without deformations or without cracking the

Be compensated wood composite plate.

Particularly advantageous are the cover plates made of side boards, on whose

Longitudinal sides each side longitudinal connection profiles are arranged. Due to the longitudinal connection profiles on the longitudinal narrow sides of the side boards, the

juxtaposed side boards are glued together particularly precisely and dimensionally stable in each case to cover plates. A warping of the cover plates due to

Moisture fluctuations alone is reduced by arranging the longitudinal connection profiles on the glued together longitudinal narrow sides of the side boards.

Furthermore, by the Bewegungsnuten on the inner surfaces of the cover plates the

Warping or swelling of the cover plates due to moisture fluctuations significantly reduced. A further advantage of the wood composite board according to the invention, since in comparison to a conventional BSP plate in the same total thickness without grooves, an increased drying rate can be achieved. Due to the grooves and the inside composite inner surfaces of the cover plates are increased and thereby created air cushion within the wood composite panel, whereby the thermal insulation improves or the thermal conductivity of the wood composite panel is reduced. In addition, in the manufacture of the wood composite panel fire retardants, paints or impregnants due to the enlarged by the movement of the inner surfaces can be made more efficient and deeper into the cover plates and thus the wood composite panels are particularly high quality preserved or coated.

The outer surfaces of the cover plates which are external in the composite and the inner surfaces can be made, for example, sawn or smoothed by means of machining processes. Similarly, cover plates can be made of different qualities of wood in different wall thicknesses. For example, cover plates can be produced from flat wood glued to one another, the so-called side product. Individual cover plates are made, for example, in any width from each other bonded to each other on the narrow side Brettholzware, the plate length of individual cover plate sections may for example be several meters in length. The individual cover plate sections become in their manufacture together along their total width for example, connected to a general wedge connection to a cover plate of any length. Accordingly prepared cover plates can therefore a

General wedge tine connection between two interconnected

Having cover plate sections.

The design of the movement grooves can also be made variable according to different aspects. By setting narrow, farther apart

spaced movement grooves especially the elasticity of the cover plates is increased and it will be largely guaranteed crack-free surfaces of the wood composite board. By setting numerous movement grooves with only small distances between adjacent movement grooves, for example, with distances between adjacent movement grooves substantially the same order of magnitude as the groove width, in addition to the increase in the elasticity of the surfaces in addition also a composite located within the composite wood panel air cushion is generated and thus the Heat insulating effect of

Wood composite panel further improved.

In a wood composite panel according to the invention, the movement grooves are particularly advantageously arranged in each case parallel to one another at least on a section of the inner surface, preferably in each case over the entire inner surface. Thus, the advantages of the cover plates provided with movement grooves, in particular the reduced stresses due to temperature or humidity fluctuations, are achieved over the entire cover plate surface.

Appropriately, in a wood composite panel according to the invention, the cover plates are glued to each other with a crosswise offset motion grooves to form a wood composite. The arrangement of the two cover plates with crosswise staggered movement grooves arranged a wood composite panel is obtained, which is particularly reduced stress and lead in the humidity or temperature fluctuations to no or only a slight swelling or buckling of the wood composite panel.

Of advantage for certain applications are in a composite wood panel according to the invention, the cover plates also provided on their outer surfaces in the composite outer surfaces each with movement grooves. In this embodiment variant, the movement grooves are arranged, for example, as double grooves both on the inner surfaces and on the outer surfaces of the cover plates. Thus, stresses are reduced particularly advantageous both on the inner surfaces, as well as on the outer surfaces of the cover plates. Advantageously, in a wood composite panel according to the invention, the movement grooves have a movement groove width of less than 2 mm, preferably between 1 mm and 1.9 mm, particularly preferably between 1.4 mm and 1.8 mm.

Suitably, in a wood composite panel according to the invention, a movement groove spacing between adjacent movement grooves is less than or equal to 12 mm, preferably less than or equal to 10 mm.

In a further advantageous embodiment of the invention in a

Wood composite plate movement grooves a Bewegungsnuttiefe of less than 50%, preferably less than 40% of a wall thickness of a cover plate. In this version it is ensured that the remaining wall thickness of at least 50% of the

original wall thickness of the cover plates is sufficient to form a stable

Get wood composite panel with the required strength characteristics. The selected movement depths ensure particularly low-tension cover plates which compensate for moisture and temperature fluctuations quickly.

In a preferred embodiment of the invention, in a wood composite panel, the movement grooves are incorporated in cover plates having a target moisture content of not more than 15% moisture, preferably from 7% to 13% moisture. Appropriately, the

Movement grooves in already dried cover plates, which have a maximum of 15% moisture, arranged.

In a further development of the invention, at least one center-layer plate is arranged between the cover plates in a multilayer composite wood panel. As a middle layer plates, a wide variety of wood qualities can be used. For example, middle layer plates can be made from side or middle boards with about the same board thickness as the

Be made cover plates. Likewise, middle layer plates can be made of glued-together square timber planks, crosswood planks or center beams. Likewise, it is conceivable within the scope of the invention to use substantially halved squared timbers in a natural state for the production of a middle layer plate. Furthermore, within the scope of the invention, a plurality of middle layer plates of the same or different plate thickness and / or the same or different wood qualities can be used adjacent to one another and together with the outer cover plates form a wood composite plate according to the invention.

Appropriately, in a wood composite panel according to the invention, the at least one

Center plate provided on both its outer surfaces each with drying grooves. By the arrangement of drying grooves respectively on both outer surfaces of the center plate plates and the center plate plates are advantageously voltage reduced and it will be

Drying rate increased. Furthermore, by means of the drying grooves enlarged surface of the middle layer plates within the drying grooves

enclosed air cushion further increased and thus further improves the thermal insulation properties of the wood composite panel according to the invention.

In a further variant according to the invention, an odd number of center ply plates are provided in a wood composite plate, wherein adjacent center ply plates are glued to each other with each other crosswise offset drying grooves.

In a further preferred embodiment are in an inventive

Wood composite plate adjacent middle layer plates each glued to each other crosswise offset wood fiber directions.

Due to the arrangement of the drying grooves in each other in a crosswise offset manner

adjacent center plates or their orientation with staggered

Wood fiber directions of each center plate is the strength of the

Overall wood composite plate significantly increased and unwollendes warping or swelling further reduced. Tensions in the individual layers are particularly evened out or completely reduced.

Are advantageous in a wood composite panel according to the invention adjacent

Center plates to each other with an angular offset, preferably with a

rectangular angle offset, arranged and thereby form barrier layers against the cover plates. Wood composite panels according to this embodiment have a particularly high dimensional stability and can transfer loads particularly homogeneous in all directions.

Suitably, in a wood composite panel according to the invention, the at least one center panel made of long wood parts, for example, side boards, center boards, center planks, square timber planks, crosswood planks and / or center planks formed.

Advantageously, in a wood composite panel according to the invention, each log portion has at least one drying groove on its opposite outer surfaces. In a particularly advantageous variant of the invention, in the case of a wood composite panel, the at least one drying groove is in each case designed as a double-sided double groove on the opposite outer surfaces of each longwood part.

Particularly economical is a wood composite board according to the invention, in which

Square timber planks are arranged in each case by opposite juxtaposition to a central ply plate, wherein in each case alternately a trimmed sharp edge of a first timber screed comes to rest next to a forest edge of an adjacent second timber screed. Thus, wood composite panels can be produced particularly cost-effective also with great overall strength, which are suitable for use in structural timber construction with high load transfer. In this particularly economical embodiment of the invention can advantageously only partially trimmed round wood with at least partially still existing forest edge, so be recycled together with the still unprocessed edge of the tree. It is also conceivable, even inferior trunk wood with incipient

To use core damage as a center material.

Expediently, in a wood composite panel according to the invention, the drying grooves on the at least one center panel each have a drying groove width of at least 2 mm, preferably of at least 3 mm.

In a further preferred embodiment of the invention, in a wood composite panel, the drying grooves on the at least one center panel each have one

Drying groove depth, which is at least a quarter, preferably at least one-third, of a wall thickness of the center platen. Drying grooves with groove depths of this order of magnitude offer the advantage that even for middle-layer plates with a large

Wall thickness, which are made for example of center planks or square timber planks, a sufficient elasticity increase or stress reduction and significantly improved drying properties can be achieved.

Particularly useful are in a wood composite board according to the invention the

Drying grooves on the at least one center-plate plate in each case as a double-sided double groove on the opposite outer surfaces.

Expediently, in the case of an intermediate product for producing a wood composite panel according to the invention, a moisture content of the long wood parts of the center panel when arranging the drying grooves amounts to at least 30% moisture. The drying grooves are arranged on the lumber pieces in Säägenaßen state, whereby their drying behavior significantly improved and the drying rate is greatly increased. Provided with drying grooves moist long wood parts can thus be dried quickly to a required target moisture of, for example, 10% or 13% and thus are cost and quickly available for further processing to a wood composite board according to the invention.

In a development of the invention, a method for producing a cover plate in a multilayer composite wood panel can be specified by a sequence of the following production steps:

a. ) Optional selection of side boards with a board thickness of at least 15 mm, preferably of at least 20 mm;

b. ) Attach a drying groove on each side surface of each selected one

Side boards with a cutting or milling device, wherein the drying groove is set substantially in the longitudinal direction and preferably in the middle of the width of the side surface of the side board;

c. ) Drying of the side boards up to a target moisture content of at most 15% moisture, preferably from 7 to 13% moisture;

d. Leveling of the dried side boards and, if necessary, reducing the

Board thickness;

e. If appropriate, measuring, preferably optical measurement, of the dried and equalized side boards as well as the position of the drying groove;

f. Setting up each side board along its drying groove;

G. If necessary, rework the drying groove as straight, if necessary in

Compared to the drying groove also widened guide groove by means of a cutting or milling device;

H. ) Trimming each side board at its longitudinal edges, with each lateral

Longitudinal connection profiles are obtained;

i. ) Dividing the trimmed side board along its drying groove or guide groove by means of a cutting or milling device;

j.) If necessary, turning and / or hitting the split side boards and lateral

Placing the board parts together as a joining partner;

k.) applying an adhesive layer on the lateral longitudinal connection profiles of

Side board parts and / or on the straight dividing surfaces;

1.) Side juxtaposition and bonding of the side board parts to a cover plate

preferably under the action of a surface pressure and lateral

Pressing force application;

m.) If necessary, cutting to length of the dried cover plate as well n.) arranging parallel motion grooves using a sipe or

Milling device on at least a portion of a side surface of the dried cover plate.

Especially with wet side boards with board thicknesses of at least 15 mm, the arrangement of drying grooves for faster drying has proven to be particularly advantageous. For side boards with lower board thickness is attaching a

Drying groove usually not required. Depending on the course of the drying groove after drying the side board, it may be necessary that the drying groove must be reworked again in order to be particularly straight, at best somewhat widened

Guide groove for the following processing steps of trimming and exact sharing can be used.

Of course, the arrangement of several drying grooves for and

subsequent drying on already dry side boards with a maximum moisture of 15% moisture is eliminated. However, it is advantageous in such a case, if at least one guide groove is milled into a board side, to ensure an exact trimming and accurate parts of the side board along the guide groove.

Advantageously, the split side boards by turning, ie by rotation about its longitudinal axis by about 180 ° and by hitting, ie by folding or falling of one of the two side boards transverse to the longitudinal direction of the side board and by subsequent lateral juxtaposition of the two joining partners such halved to two

Side boards are placed against each other, that the straight dividing surfaces each come to rest on the outside of the two Seitenbretthälften and the obliquely edged edges complementary to each other, the adjacent inner edges of the adjacent

Form side halves.

Advantageously, the movement grooves are only attached to the finished in their dimensions, dried cover plate.

In a further advantageous embodiment of the invention, a method for

Production of a multilayer wood composite panel a sequence of the following

Manufacturing steps are given:

a.) Producing two provided with movement grooves dried cover plates according to a manufacturing variant according to the invention; b. If appropriate, applying an adhesive layer to the movement provided with grooves

Side surface of at least one cover plate;

c. ) Assemble two provided with motion grooves cover plates, wherein the

Movement grooves are preferably arranged on the inner surfaces lying in the composite preferably crosswise offset from each other and

d. ) Joining to a first wood composite panel preferably under the action of a surface pressure.

In this embodiment, two provided with Bewegungsnuten dried cover plates are used according to the method described above for producing a cover plate in a multilayer composite wood panel, for example, by applying an adhesive layer at their two provided with moving grooves insides, then stacking and final compression to a first

Wood composite panel are made.

Suitably, a further variant of the method according to the invention for producing a middle layer plate in a multi-layer wood composite plate by a sequence of the following manufacturing steps is defined:

a. Select and sort sawing pieces of long wood such as

Side boards, center boards, center planks, square timber planks, crosswood planks and / or center planks;

b. ) Arranging each of at least one drying groove on opposite

Outer surfaces of saw-sawed longwood parts;

c. ) Drying the long wood parts up to a target moisture content of a maximum of 15% moisture, preferably from 7% to 13% moisture;

d. ) If necessary, equalize the dried long wood parts;

e. Optional trimming of the dried lumber pieces optionally with attachment of a guide groove on one side of each log portion, wherein with the aid of the guide groove profiling of the log portion takes place symmetrically to its full cross-section;

f. ) Lateral juxtaposition of the dried Langholzteile, which may be spent in a mutually rotated and / or fallen position, allied to a single-layer plates, said provided with drying grooves outer surfaces of the dried Langholzteile each form the outer surfaces of the plate composite, or g. ) Side juxtaposition as well as at least partial overlapping of

dried Langholzteilen, which are optionally spent in a mutually rotated and / or fallen position, to a multilayer panel composite, wherein the outer surfaces of the dried lumber pieces provided with drying grooves are respectively oriented to the outer surfaces of the multi-layer sheet composite;

H. ) Applying adhesive between adjacent juxtaposed logs; i. ) Gluing the adhesive surfaces of the long wood parts under pressure and j.) Connecting the long wood parts to a glued center plate.

For the production of center plies different long wood parts, such as side boards, center boards, center planks, square timber planks, crosswood planks and / or center planks can also be used in low quality. The long wood parts are doing after the aforementioned production steps to one or more

Glued center plate, which form the core of the multilayer composite wood panel.

In a further development of the invention, a method for producing a multilayer composite wood panel can be specified by a sequence of the following production steps:

a. ) Producing two motion-equipped dried cover plates according to a manufacturing variant according to the invention for such cover plates;

b. ) Producing at least one provided with drying grooves dried

Central plate according to a production variant according to the invention for such middle layer plates;

c. ) Applying an adhesive layer at least on the outer surfaces of the at least one

Center-plate and / or on the provided with motion inner surfaces of the cover plates;

d. ) Placing the cover plates and the at least one central plate plate to one another

Plate assembly, so that the cover plates delimiting the at least one center-plate plate from the outside and the motion-grooved side surfaces of the cover plates in the interior of the plate assembly, wherein the movement grooves or

Drying grooves adjacent layers of the cover plates and the at least one

Center plate each arranged crosswise offset from each other;

e. ) If necessary, with several center plate plates arranging adjacent

Center plates each arranged offset with each other crosswise

Wood fiber directions and / or with an angular offset, whereby locking layers of individual center layer plates are formed relative to the outer cover plates; as well as f. ) Joining the cover plates and the at least one central-layer plate to a second composite wood panel preferably under the action of a surface pressure.

In this embodiment, in the case of a plurality of center-plate plates, the adjacent center-plate plates are each offset crosswise relative to one another. The joint directions or Längsverbindungsprofilrichtungen between adjacent side boards, center boards or planks within a central plate plate are also crossed by the crosswise arrangement of the plurality of center plate plates, which is why locking layers of individual

Make center plate against the outer cover plates. Due to the crosswise arrangement of the middle layer plates, a wood composite board produced in this way is characterized by particularly high dimensional stability and torsional rigidity and is particularly well suited for receiving or uniform discharge and distribution of high loads.

Further details, features and advantages of the invention will become apparent from the following explanations of schematically illustrated in the drawings

Embodiments. In the drawings show:

- Fig. 1 in an isometric view obliquely from the front a first embodiment of a wood composite board according to the invention with two glued together

Cover plates;

- Fig. 2 and Fig. 3 respectively in isometric views obliquely from the front, a second and third embodiment of a fiction, contemporary wood composite board, each having a plurality of center plates;

- Fig. 4 in a sectional view in profile, the arrangement of drying grooves in one

Long piece of wood;

FIGS. 5A to 5C respectively in sectional views in profile Details of individual cover plates;

FIGS. 6A to 6C show sectional views of details of long wood parts for producing a middle layer plate;

- Fig. 7 and Fig. 8 respectively in isometric views obliquely from the front another

Embodiments of wood composite panels according to the invention with several

Center plates;

- Fig. 9 and Fig. 10 respectively in frontal views in cross-section variants of a

wood composite board according to the invention with a central layer plate, which is made of halved and partially edged and re-bonded square timber planks in natural state; and FIG. 9 shows an example of the exploitation of wood with incipient nuclear rot;

11 is an isometric sectional view from the front of a further embodiment of a wood composite panel according to the invention comprising two center panel panels which are made of halved and partially trimmed round wood and another center panel as a barrier layer;

- Figure 12 in a sectional view in profile a fiction, contemporary wood composite board with a center platen of crosswood planks. 13 in a sectional view in profile from the front center panel of a wood composite panel according to the invention without cover plates;

- Figure 14 in a sectional view in profile a fiction, contemporary wood composite board with two thinner cover plates and three center plates each made of crosswood planks.

FIG. 15 shows a schematic sketch of side board goods with trunk-parallel and halved with trapezoidal division and a shorter profile bevel of the second, wider half to increase the yield; FIG.

16 is a sectional view of a section of the cross section of a tree trunk for comparison of different efficient utilization solutions of a tree edge length with profile slope of axially parallel round wood division;

FIG. 17 shows, in a simplified sectional sketch, the utilization difference of in. FIG

continuous board length parallel and trapezoid profiled side goods;

FIG. 18 shows in a simplified sectional sketch in cross-section a detail of FIG

Rundholzprofils a tree trunk in comparison of different Besäumungsprofile with the slopes of braid, middle and floor side of profiled sidewalls, the drying grooves in the middle of the board already on the square timber before separating the

Side boards are incorporated.

Fig. 1 shows an isometric view obliquely from the front a first embodiment of a wood composite panel 1 according to the invention with two glued together

Cover plates 2. The two cover plates 2 each have continuous outer surfaces 3, which are executed here sawn, for example. At their inner surfaces 4 which are located in the composite, the two cover plates 2 each have a wall thickness 5 of mutually parallel movement grooves 6. The Bewegungsnuten 6 are each distributed uniformly over the entire inner surfaces 4 here. Each movement groove 6 has a Bewegungsnutbreite 7 and a Bewegungsnuttiefe 8, wherein adjacent movement grooves 6 are spaced apart in a groove spacing 9. The two cover plates 2 are glued together with a commercially available adhesive 10.

Each cover plate 2 is here of several each with substantially the same

Wood fiber direction 40 adjacent side boards 20 made, the

Side boards 20 with a board thickness 21 each on their narrow sides with a

Longitudinal profile 22 provided and glued to each other at the narrow sides to a flat cover plate 2. The side boards 20 are adjusted here in each case with the same length, which in each case after a Seitenbrettlänge a continuous

Cross connection profile 23 transversely to the longitudinal direction of the side boards 20 occurs. The

Cross connection profile 23 is here as across the width continuous

General wedge tine compound executed and offers the advantage that by a tensile test in the longitudinal direction of the cover plate 2, the strength of each individual cross-connection profile 23 can be checked. The two cover plates 2 are arranged here crosswise to each other. The movement of grooves 6 on the inner surfaces 4 of the two cover plates 2 are thus arranged crosswise to each other. Furthermore, both the wood fiber directions 40 of FIG. 1 upper cover plate 2 with respect to the lower cover plate 2, as well as their

Longitudinal connection profiles 22 and cross connection profiles 23 each arranged crosswise to each other. In the profile are at the front cutting edge of the annual ring layers 41 of

Recognize side boards. In the composite of the glued together cover plates 2 thus a particularly high-quality, torsion-resistant wood composite panel 1 with a

Total strength 24 created. The total thickness 24 essentially corresponds to the sum of the wall thicknesses 5 of the individual cover plates 2.

Fig. 2 and Fig. 3 show a second and third embodiment of a

In FIG. 2, there are three center ply plates 12 between the two cover plates 2. The three center ply plates 12 each have their outer surfaces 13 on both sides

Drying grooves 16 and are made approximately in the same wall thickness 14 as the wall thickness 5 of the cover plates 2. Adjacent center layer plates 12 are glued together with mutually crosswise offset drying grooves 16. Due to the substantially rectangular angular offset between adjacent center plate plates 12 form individual layers of the center plate plates 12 locking layers 15, which of their

Wood fiber direction 40 or from the direction of the longitudinal connection profiles 22 and the division surfaces 29 between adjacent center boards 20 with respect to the cover plates 2 are arranged substantially at right angles. Such inventive fiction

Wood composite panels 11 are characterized by particularly high dimensional stability and

Torsional rigidity.

In Fig. 3, three center plate plates 12 are shown, wherein the centrally arranged, central center plate plate 12 is made of glued together long wood parts 25. The long wood parts 25 are glued together at their narrow sides along their longitudinal connection profile 29. The two adjoining the middle center plate plate 12 outwardly adjacent center plate plates 12 which form barrier layers 15 with respect to the cover plates 2, as well as the central center plate 12 at their two outer surfaces 13 each have drying grooves 16. The middle layer plates 12 have a wall thickness 14. The drying grooves 16 on the center plate plates 12 have a drying groove width 17 and a drying groove depth 18 and are arranged at intervals 19 spaced from each other in parallel. The center plate plates 12 are together and with the outer cover plates 2 glued together by means of intermediate adhesive layers 10 each surface. The cover plates 2 used here are only on their

Inner surfaces 4 provided with movement grooves 6.

In the wood composite panel 11 shown in Fig. 2, the wall thicknesses 14 of

The overall thickness 24 of the wood composite panel 11 is thus substantially five times the wall thickness of the individual glued together cover plates 2 and center plates 12. In contrast, in Fig. 3 are as middle center plate 12 long wood parts 25 with larger Wall thickness 14 glued together. As a middle center plate 12 are here

For example, center planks 28 each with their straight dividing surfaces 29 with

Adhesive layers 10 glued together. On the outer sides 30 of the center planks 28 each drying grooves 16 are milled. The outwardly adjacent

Center plate 12 are each arranged as a blocking positions 15 relative to the central, central center plate plate 12 is rotated crosswise.

FIG. 4 shows, in a sectional view in profile, the arrangement of drying grooves 16 in a long wood part 25. Milling tools 34 with a different cutting profile here engage in the long wood part 25 to form drying grooves 16. On the left in the picture, a drying groove 16 with a substantially round groove bottom 33 is shown.

Right in the image of Fig. 4 is a drying groove 16 with a polygonal profile as

Groove bottom 33 shown. The distance 19 between the drying grooves 16 is here, for example, 20 mm and the drying groove width 17, for example, each 3 mm.

FIGS. 5A to 5C each show in detail views a single cover plate 2 as part of a wood composite panel according to the invention. Individual side boards 20 are each provided with a longitudinal connection profile 22 along its narrow sides and to the

Narrow sides glued together to form a plate-shaped component 2. Movement grooves 6 are here in each case only on one surface, which comes to lie in conjunction with other cover plates 2 or center plate plates as the inner inner surface 4 of the cover plate 2, respectively.

The movement grooves 6 in FIG. 5A have a larger groove depth 8 and a smaller groove width 7 than is the case with the movement grooves 6 illustrated in FIGS. 5B and 5C. In FIGS. 5B and 5C, the groove width 7 of the movement grooves 6 corresponds approximately to their groove depths 8. The movement grooves 6 shown in FIG. 5A serve primarily to make the cover plate 2 free of cracks or stress-free. The in Fig. 5B and 5C shown movement grooves 6 further offer the advantage that the heat-insulating effect of such cover plates 2 is improved by the trapped in the grooves 6 air cushion.

FIGS. 6A to 6C respectively relate to details of a log portion 25, for example a section of a center beam 28. In FIG

Drying groove 16 arranged as opposed double groove on the center plank 28 with a straight core layer. The center plank 28 has a wall thickness 14. Here, in the profile of FIG. 6A, the center groove 28 has a uniform course of the annual ring ply 41 and a central core ply, for which reason a respective drying groove 16, which is substantially is arranged centrally each side of the long wood part 25, sufficient.

In FIG. 6B, three mutually spaced drying grooves 16 with a groove depth 18 are provided on each outer side of the center pile 28, each as a double groove. As indicated by dashed lines in the profile of the annual ring layer 41, this is, for example, a core deviation in a center pile 28 with a restless core layer. To after the

To divide drying out two core boards are therefore here three each

Drying grooves 16 provided on each outer side of the center pile 28.

In Fig. 6C, a center pile 28 is provided with numerous drying grooves 16 arranged parallel to each other. The drying grooves 16 are arranged in each case at a distance 19 adjacent to each other on both outer surfaces 13 of the center pile 28, which steps so prepared faster by the drying can be performed and processed in the center layer plates.

In Fig. 7, a further variant of a wood composite panel 11 according to the invention with three inner center panel plates 12, which are each bounded to the outside of two cover plates 2, shown. The centrally arranged central center plate 12 is made of bonded together with adhesive 10 sections of center planks 28 of parallel coat incision. The two adjacent, outwardly adjacent center plate plates 12 are arranged opposite the central center plate plate 12 at an angle offset and thus form barrier layers 15 with respect to the outer cover plates second

Fig. 8 relates to a wood composite panel 11 with a centrally disposed center plate 12 from opposite pairs arranged one above the other, each wedge-shaped Long wood parts 25, which are juxtaposed and glued together at their longitudinal profiles 29. The centrally arranged center-plate 12 and the adjoining center-layer plates 12, which form barrier layers 15, each have drying grooves 16 on both sides. Outside each cover plates 2 lesser wall thickness 5 are arranged with internal movement grooves 6.

Fig. 9 illustrates a first variant of a wood composite panel 11 according to the invention with a center plate 12, which is made of halved and partially trimmed round wood in natural state. For this purpose, halved square timber planks 26 are each provided on their opposite outer surfaces with drying grooves 16 and glued together after drying to a central platen 12 with large wall thickness 10. 10. For the center platen 12 can be used here also advantageously wood with beginning in the core area color and hard brown core damage as can be clearly seen in FIG. 9 by the darker grain in the core area of the square timber planks 26. In the square timber planks 26 of the center platen 12 each sections with a trimmed sharp edge 31 are arranged alternately with sections with an untreated, even with residual forest edge 25 in natural state. The cover plates 2 are arranged offset as cross-layers 15 to the longitudinal profiles 29 in sawing direction of the square timber 26. The cover plates 2 have movement grooves 6 on their inside in the wood composite inner surfaces 4 and on their outer surfaces 3.

Fig. 10 shows a further development of the variant shown in Fig. 9, in which now three central ply plates 12 form the core of the wood composite panel 11 and additionally each thinner cover plates 2 form the visible outer surfaces 3 of the wood composite panel 11. The centrally arranged middle central platen 12 is similar to FIG. 9 also made of square timber planks 26, so made of halved and partially trimmed round wood in natural position with or without incipient core damage.

Fig. 11 shows a further embodiment of a fiction, contemporary

Wood composite panel 11, in which a total of five layers each in screed dimension

comparable to log cabin planks connected to each other. A centrally arranged, central center-plate plate 12 and two outer cover plates 2 thereby delimit two intermediate plate plates 12 arranged in between and standing in a staggered manner in half

Square timber planks 26. The square timber planks 26 are each provided with drying grooves 16, which are arranged in double-groove design respectively on both outer sides 30 of the long wood parts 25 and thus for a rapid drying of target moisture and low

Residual stresses in the composite adhesive bonded with the 10 squared timber 26 provide. Fig. 12 illustrates a fiction, contemporary wood composite panel 11 with a center-plate 12 of cross-wood planks 27. Die Kreuzholzbohlen 27 with approximately square cross-section each have drying grooves 16. The cover plates 2 are provided with movement grooves 6 on the inner surfaces 4 in order to ensure crack-free cover or visible surfaces of the outer surfaces 3 of the wood composite panel 11.

FIG. 13 shows in a sectional view in profile a detail of a further embodiment of a wood composite panel 11 according to the invention. Three center panel panels 12 each one

Wall thickness 14 are shown here without the cover plates 2 otherwise still outside. The middle layer plates 12 are each made of cross-laminated wood planks 27 each having a substantially square cross-section.

Fig. 14 shows in a sectional view in profile a composite wood panel 11 according to the invention with two thinner cover plates 2 and three center plate plates 12 respectively

Crosswood planks 27. The adjacent layers of the center plate plates 12 are each arranged to each other with an angular offset, which is why the two outer

Center plate 12 relative to the central, central center plate 12 each form barrier layers 15. In this embodiment, a particularly strong wall element 11 is obtained with two outer cover plates 2 with a total thickness of the wood composite panel 11, for example, from 30 to 60 cm thickness.

Fig. 15 shows in a simplified sketch Seitenbrettware 20 with parallel or

trapezoidal profiling. Advantageously, lateral boards or center boards 20 can also be processed from a cantilevered recess with a parallel division - as shown in FIG. 15 above - or with a trapezoidal profiled division - as shown in FIG. 15 below - to cover plates 2 or center-plate plates 12. The middle boards 17 are, for example, halved, for example, in length, according to their different longitudinal connection sprofil 22 placed together and glued together.

Fig. 16 comparatively shows in a simplified sectional sketch in cross section

different longitudinal connection profiles 22 from axis-parallel pitch for trimming or profiling the longitudinal edges of the side boards or center boards 20. As can be seen, the lengths of the profile slopes of the longitudinal connection profile 22 are very different. Thus, particularly advantageous recycling solutions for wood division are possible. 17 shows in a sectional sketch the difference between a side board 20, which is profiled in a continuous board length, which is shown in section, and a trapezoidal profiled side board 20 'with a smaller wood waste, which is shown by dashed lines, and also punctures a shorter profile slope 22 with a higher yield the second half of the board.

Fig. 18 illustrates in a simplified sectional diagram in cross section a

Round wood cut compared with different edging profiles of profiled side fabric. Here, a so-called two-part incision is made to obtain from the round timber two square timber planks and the corresponding sidewalls. Depending on the selected slope of the angle of the longitudinal connection profile 22 different yields are achieved. As a trimming angle of the longitudinal connection profile 22, for example, angular positions with 25 °, 35 ° and 50 ° bevel are plotted on the braid, middle and floor. For exact alignment during the trimming or profiling serve drying grooves 16, which may be reworked as a guide and widened in its groove width 17. The drying grooves 16 are optionally already made on Spanenkantholz before separating the side boards 20, possibly also with a deviating to the square wood axis position of the drying groove 16, which results from the optical measurement and is set in the future board center or board axis.

List of item numbers:

1 wooden composite panel

2 cover plate

3 outer surface of the cover plate

4 inner surface of the cover plate

5 Wall thickness of the cover plate

6 movement groove

7 width of the movement groove

8 depth of the movement groove

9 Distance between movement grooves

10 adhesive or adhesive layer

11 wood composite plate comprising at least one center plate

12 center plate

13 outer surface of the center plate

14 Wall thickness of the center plate

15 locked position

16 drying groove

17 width of the drying groove

18 depth of the drying groove

19 Distance between drying grooves

20 side board, middle board

21 Board thickness of the side board or middle board

22 longitudinal connection profile between adjoining side boards or middle boards

23 Cross connection profile or key spline connection

24 Total thickness of the wood composite panel

25 long wood part of a middle layer plate

26 timber screed

27 crosswood plank

28 center screed

29 Division surface or longitudinal profile in sawing direction

30 outside of a long wood part

31 sharp edge (trimmed)

32 forest edge

33 groove bottom

34 milling tool

40 wood fiber direction

41 annual ring situation

Claims

Claims:

1. Multi-layer wood composite panel (1, 11), comprising two cover plates (2), wherein the cover plates (2) are provided at their inside in the composite inner surfaces (4) each with movement grooves (6), characterized in that the cover plates (2) from side boards (20), on the longitudinal narrow sides of each side

Longitudinal connection profiles (22) are arranged are made.

2. wood composite plate (1, 11) according to claim 1, characterized in that in each cover plate (2) the movement grooves (6) each parallel to each other at least at a portion of the inner surface (4), preferably over the entire

Inner surface (4) are arranged.

3. wood composite panel (1, 11) according to claim 1 or 2, characterized in that the cover plates (2) arranged offset with each other crosswise

Movement grooves (6) bonded to a wood composite (10) are.

4. wood composite panel (1, 11) according to one of claims 1 to 3, characterized

in that the cover plates (2) are each provided with movement grooves (6) on their outer surfaces (3) which are external in the composite.

5. wood composite panel (1, 11) according to one of claims 1 to 4, characterized

in that the movement grooves (6) have a movement groove width (7) of less than 2 mm, preferably between 1 mm and 1.9 mm, particularly preferably between 1.4 mm and 1.8 mm.

6. wood composite plate (1, 11) according to one of claims 1 to 5, characterized

characterized in that a Bewegungsnutabstand (9) between adjacent

Movement grooves (6) is less than or equal to 12 mm, preferably less than or equal to 10 mm.

7. wood composite plate (1, 11) according to one of claims 1 to 6, characterized

in that the movement grooves (6) have a movement groove depth (8) of less than 50%, preferably less than 40% of a wall thickness (5) of a

Cover plate (2) have.

8. wood composite panel (1, 11) according to one of claims 1 to 7, characterized

characterized in that the movement grooves (6) in cover plates (2) with a target moisture content of at most 15% moisture, preferably from 7% to 13% moisture, are incorporated.

9. Multilayer composite wood board (11) according to one of claims 1 to 8,

characterized by at least one center plate (12) which is arranged between the cover plates (2).

10. wood composite panel (11) according to claim 9, characterized in that the

at least one center-plate (12) is provided at both outer surfaces (13) each with drying grooves (16).

11. wood composite panel (11) according to one of claims 1 to 10, characterized by an odd number of center plate plates (12), wherein adjacent

Central ply plates (12) are each glued together with mutually crosswise offset drying grooves (16).

12. wood composite panel (11) according to claim 11, characterized in that

adjacent center-layer plates (12) are glued to each other with crosswise staggered arranged wood fiber directions (40).

13. wood composite panel (11) according to claim 11 or 12, characterized in that adjacent center layer plates (12) to each other with an angular offset, preferably with a right angle offset, are arranged and thereby form locking layers (15) relative to the cover plates (2).

14. wood composite panel (11) according to any one of claims 9 to 13, characterized

characterized in that the at least one center-plate (12)

Lumber parts (25), for example, from side boards (20), center boards (20), center planks, square timber planks (26), crosswood planks (27) and / or

Center planks (28) is formed.

15. wood composite panel (11) according to claim 14, characterized in that each Langholzteil (25) at its opposite outer surfaces (30) has at least one drying groove (16).

16. wood composite panel (11) according to claim 14 or 15, characterized in that the at least one drying groove (16) in each case as a double-sided double groove on the opposite outer surfaces (30) of each Langholzteils (25) is executed.

17. wood composite panel (11) according to any one of claims 14 to 16, characterized

characterized in that square timber planks (26) each by gegengleiches

Placed next to a central plate (12) are arranged, wherein in each case alternately a trimmed sharp edge (31) of a first timber screed (26) next to a forest edge (32) of an adjacent second timber screed (26) comes to rest.

18. wood composite panel (11) according to one of claims 9 to 17, characterized

characterized in that the drying grooves (16) on the at least one

Center plate (12) each have a Trocknungsnutbreite (17) of at least 2 mm, preferably of at least 3 mm.

19. wood composite panel (11) according to any one of claims 9 to 18, characterized

characterized in that the drying grooves (16) on the at least one

Center plate (12) each have a Trocknungsnuttiefe (18), which is at least a quarter, preferably at least one third, a wall thickness (14) of the center plate (12).

20. wood composite panel (11) according to any one of claims 9 to 19, characterized

characterized in that the drying grooves (16) on the at least one

Center plate (12) are each designed as a double-sided double groove on the opposite outer surfaces (13).

21. Intermediate product for producing a wood composite board (11) according to one of

Claims 9 to 20, characterized in that a moisture content of

Langholzteile (25) of the center plate (12) when arranging the

Drying grooves (16) is at least 30% moisture.

22. A method for producing a cover plate (2) in a multilayer

Wood composite panel (1,11) according to one of claims 1 to 21, characterized by a sequence of the following production steps:

a. ) Optional selection of side boards (20) with a board thickness (21) of at least

15 mm, preferably at least 20 mm;

b. ) Attaching a drying groove (16) each on a side surface of each

selected side board (20) having a trimming or milling device (34), the drying groove (16) being set substantially in the longitudinal direction and preferably in the middle of the width of the side surface of the side board (20);

c. ) Drying the side boards (20) up to a maximum moisture content of 15%

Humidity, preferably from 7 to 13% humidity;

d. Leveling the dried side boards (20) and possibly reducing the

Board thickness (21);

e. If necessary, measuring, preferably optical measurement, of the dried

Side boards (20) and the position of the drying groove (16);

f. ) Establishing each side board (20) along its drying groove (16);

G. ) If necessary, rework the drying groove (16) as a straight guide groove by means of a cutting or milling device (34);

H. ) Trimming each side board (20) at its longitudinal edges, each side

Longitudinal connection profiles (22) are obtained;

i. Splitting the edged side board (20) along its drying groove (16) or

Guiding by means of a cutting or milling device (34);

j.) If necessary, turning and / or hitting the split side boards (20) and

lateral juxtaposition of the board parts (20) as a joining partner;

k.) applying an adhesive layer (10) on the lateral longitudinal connection sprofilen (22) of the side board parts (20) and / or on the straight dividing surfaces (29);

1.) Side juxtaposition and bonding of the side board parts (20) to one

Cover plate (2) preferably under the action of a surface pressure and lateral

Pressing force application;

m.) If appropriate, cutting to length the dried cover plate (2);

n.) arranging parallel movement grooves (6) by means of an incision or

Milling device on at least a portion of a side surface (4) of

dried cover plate (2).

23. A method for producing a multilayer wood composite panel (1) according to any one of claims 1 to 8, characterized by a sequence of the following

Manufacturing steps:

a. ) Producing two with movement grooves (6) provided dried

Cover plates (2) according to a sequence of manufacturing steps a.) To n.) Of

Method claim 22,

b. Optionally, applying an adhesive layer (10) to the side surface (4) provided with movement grooves (6) of at least one cover plate (2);

c. ) Laying two provided with movement grooves (6) cover plates (2), wherein the movement of grooves (6) respectively at the inside of the composite

Inner surfaces (4) are preferably arranged crosswise offset from each other; d. ) Joining to a first composite wood panel (1) preferably below

Effect of a surface pressure.

24. A method for producing a middle layer plate (12) in a multilayer

Wood composite panel (11) according to one of claims 9 to 21, characterized by a sequence of the following production steps:

a. Select and sort saw-sawed long wood parts (25) such as

Side boards (20), center boards (20), center boards, square timber planks (26),

Crosswood planks (27) and / or center planks (28);

b. ) Arranging each of at least one drying groove (16) on opposite

Outer surfaces (30) of saw-sawed long wood parts (25);

c. ) Drying the long wood parts (25) up to a maximum moisture content of 15%

Humidity, preferably from 7% to 13% humidity;

d. ) If necessary, equalize the dried longwood parts (25);

e. Optional trimming of the dried lumber pieces (25) optionally under

Attaching a guide groove on one side of each Langholzteils (25), wherein with the aid of the guide groove profiling of the Langholzteils (25) takes place symmetrically to its solid cross-section;

f. ) Side juxtaposition of the dried lumber pieces (25), which

optionally placed in a mutually rotated and / or fallen position, into a single ply composite, the outer surfaces (30) of dried longwood parts (25) provided with drying grooves (16) respectively forming the outer surfaces (13) of the composite plate, or

G. ) Side juxtaposition as well as at least partial overlapping of

dried Langholzteilen (25), which optionally rotated in a mutually and / or fallen position, into a multilayer panel composite, wherein the drying grooves (16) provided with outer surfaces (30) of the dried Langholzteile (25) respectively to the outer surfaces (13) of the multilayer

Plate composite oriented;

H. ) Applying adhesive (10) between adjacent juxtaposed

Long wood parts (25);

i. ) Bonding the surfaces of the long wood parts (25) provided with adhesive (10) under

Pressure and

j.) Connecting the long wood parts (25) to a glued center plate (12).

25. A method for producing a multilayer composite wood panel (11) according to any one of claims 9 to 21, characterized by a sequence of the following

Manufacturing steps:

a. ) Producing two with movement grooves (6) provided dried

Cover plates (2) according to a sequence of manufacturing steps a.) To n.) Of method claim 22;

b. ) Producing at least one provided with drying grooves (16) dried

Central plate (12) according to a sequence of manufacturing steps a.) To j.) Of method claim 24;

c. ) Applying an adhesive layer (10) at least on the outer surfaces (13) of

at least one middle-layer plate (12) and / or on the inner surfaces (4) of the cover plates (2) provided with movement grooves (6);

d. Placing the cover plates (2) and the at least one center plate (12) together to form a composite plate, so that the cover plates (2) at least one

The center plate (12) in each case bounding from the outside and provided with movement grooves (6) side surfaces (4) of the cover plates (2) in the interior of the plate composite, wherein the Bewegungsnuten (6) or drying grooves (16) adjacent layers of the cover plates (2) and the at least one central ply plate (12) are each arranged offset in a crosswise manner with respect to one another;

e. ) If necessary, with several center plate plates (12) arranging adjacent

Central ply plates (12) each with crosswise staggered arranged wood fiber directions (40) and / or with an angular offset, whereby

Locked layers (15) of individual middle layer plates (12) relative to the outer

Cover plates (2) are formed;

f. ) Joining the cover plates (2) and the at least one middle layer plate (12) to a second wood composite plate (11) preferably under the action of a surface pressure.