AT13575U1 - Wood composite board - Google Patents

Abstract

The invention relates to a multilayer composite wood panel (1, 11) comprising two cover plates (2), wherein the cover plates (2) are each provided with movement grooves (6) on their inner surfaces (4) lying in the composite. Furthermore, multilayer wood composite panels (11) comprising at least one center ply (12), which is arranged between the cover plates (2), as well as variants for their preparation are given.

Description

Austrian ;! jjäteüEawi AT13 575U1 2014-04-15

description

WOOD COMPOSITE PANEL

The invention relates to a multilayer wood composite panel with the features of the 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 made exclusively of softwood. 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.

By cross-staggered construction 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 bearing direction. 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 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, BSP plates can be processed in a dimensionally stable manner with CNC milling machines, which represents an additional advantage of such composite panels. Thus, in structural timber, for example, wall or ceiling panels made of BSP panels prefabricated with machining steps and installed at construction sites in place without deviations.

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

The 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.

It is therefore the object of the present invention to provide a multilayer wood composite board, which avoids the disadvantages of the prior art.

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 provided at their inner surfaces in the composite in each case with movement grooves.

By the Bewegungsnuten on the inner surfaces of the cover plates stresses in the plates due to temperature fluctuations or during drying are significantly reduced and undesirable 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 about 7% humidity in winter can thus be excluded without deformation or cracking of the wood composite panel

AT13 575U1 2014-04-15.

Furthermore, the Ver-vaulting or swelling of the cover plates due to moisture fluctuations is significantly reduced by the movement of the inner surfaces of the cover plates. 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 outside in the composite outer surfaces of the cover plates and the inner surfaces can be made smooth, for example, sawn or smoothed by machining methods. 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 are connected to each other in their production along their entire width, for example, with a general wedge teeth connection to a cover plate of any length. Accordingly produced cover plates may therefore have a general wedge tine connection between two interconnected cover plate sections.

The design of the Bewegungsnuten can also be made variable according to different aspects. By setting narrow, further 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 panel. 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 the wood composite panel further improved.

Particularly advantageous in a wood composite panel according to the invention in each cover plate, the movement grooves in each case parallel to each other at least at a portion of the inner surface, preferably each over the entire inner surface arranged. 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.

Suitably, in a wood composite panel according to the invention, the cover plates are glued to each other with a crosswise offset motion grooves to 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.

Advantageous for certain uses are provided in a composite composite panel according to the invention, the cover plates also at 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. 2.26

MerrecNsche ;; 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. on.

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

In a further advantageous embodiment of the invention, the movement grooves have a Bewegungsnuttiefe of less than 50%, preferably less than 40% of a wall thickness of a cover plate in a wood composite panel. 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 obtain a dimensionally stable composite wood panel with the required strength indexes. 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, the Bewegungsnuten in a wood composite plate in cover plates with a target moisture content of a maximum of 15% moisture, preferably from 7% to 13% moisture, incorporated. The movement grooves are expediently arranged in already dried cover plates which have a maximum of 15% moisture.

In one embodiment of the invention, at least one center-layer plate between the cover plates is arranged in a multilayer wood composite panel. As a middle layer plates, a wide variety of wood qualities can be used. For example, center plies can be made from side or center boards with about the same board thickness as the 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, in the context of the invention, a plurality of center position plates of the same or different plate thickness and / or same or different wood qualities adjacent to each other can be used and together with the outer cover plates form a composite wood panel according to the invention.

Suitably, in a wood composite panel according to the invention, the at least one central ply plate provided at both outer surfaces thereof each with drying grooves. The arrangement of drying grooves in each case on both outer surfaces of the middle layer plates and the center layer plates are advantageously reduced voltage and it is their drying speed increased. Furthermore, the air cushion enclosed within the drying grooves is further increased by the surface of the middle layer plates which is enlarged by means of drying grooves, and the heat insulation properties of the wood composite board according to the invention are thus further improved.

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

In a further preferred embodiment, in a wood composite panel according to the invention, adjacent center panel sheets are glued to each other with cross-staggered wood fiber directions.

By cross-offset arrangement of the drying grooves in adjacent center-layer plates and their orientation with staggered wood fiber directions of the individual center plates, the strength of the wood composite plate is significantly increased overall and an unwanted Verwölben or sources further reduced. Tensions in the individual layers are particularly evened out or completely reduced.

Advantageously, in a wood composite panel according to the invention adjacent center layer plates to each other with an angular offset, preferably with a right 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 on 3/26 ssterreiätischis pitentäist AT13 575U1 2014-04-15 and can transfer loads particularly homogeneous in all directions.

Suitably, in a wood composite panel according to the invention, the at least one central ply made of long wood parts, such as side boards, center boards, center planks, square timber, cross-wood planks and / or center planks formed.

Advantageously, in a wood composite panel according to the invention, each long wood part on its opposite outer surfaces at least one drying groove.

In a particularly advantageous variant of the invention, the at least one drying groove is in each case designed as a double-sided double groove on the opposite outer surfaces of each Langholzteils in a wood composite panel.

Particularly economical is a wood composite board according to the invention, are arranged in the square timber planks in each case by opposite juxtaposition to a central platen, each alternately a trimmed sharp edge of a first timber screed next to a forest edge of an adjacent second timber screed comes to rest. 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 to use even inferior log wood with incipient core damage as the middle layer 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 composite wood panel, the drying grooves on the at least one central ply plate each have a drying groove depth, which is at least a quarter, preferably at least one third, a wall thickness of the center platen. Drying grooves with groove depths of this order of magnitude offer the advantage that a sufficient increase in elasticity and / or stress reduction as well as significantly improved drying properties are achieved even for center-layer plates with a large wall thickness, which are produced, for example, from center planks or square planks.

Particularly expedient in a wood composite board according to the invention, the drying grooves on the at least one center-plate plate are each designed 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 is at least 30% moisture. The drying grooves are arranged on the long wood parts in Sägeaßen state, whereby their drying behavior significantly improved and their 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 further development of the invention, a method for producing a cover plate in a multilayer composite wood panel can be indicated 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.) Attaching a drying groove in each case on a side surface of each selected

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; [0037] c.) Drying the side boards to a target moisture content of at most 15% moisture, preferably from 7 to 13% moisture; D.) Leveling the dried side boards and optionally reducing the board strength; E.) Optionally measuring, preferably optical measurement, the dried and leveled side boards and 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, compared to the drying groove also widened guide by means of a cutting or milling device; H.) Trimming each side board at its longitudinal edges, wherein each lateral longitudinal connection profiles are obtained; I.) Parts of the edged 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 seitli Ches juxtaposition of the board parts as joining partners; K.) Applications of an adhesive layer on the lateral longitudinal connection profiles of

Side board parts and / or on the straight dividing surfaces; I.) 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.) Optionally cutting the dried cover plate to length, and n.) Arranging parallel movement grooves by means of a cutting or Fräsvor direction on at least a portion of a side surface of the dried cover plate.

Especially with damp sides boards with board thicknesses of at least 15 mm, the arrangement of drying grooves for faster drying has been found to be particularly advantageous. For side boards with lower board thickness attaching a drying groove is usually not required. Depending on the course of the drying groove after drying the side board, it may be necessary for the drying groove to be reworked in order to be used as a particularly straight, possibly somewhat broadened guide groove for the following processing steps of trimming and exact splitting.

Of course, the arrangement of several drying grooves for and subsequent drying can be omitted in already dry side boards with a maximum moisture of 15% moisture. 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 to two halved side boards are placed against each other, that the straight dividing surfaces each come to rest on the outside of the two Seitenbretthälften and form the obliquely edged edges complementary to each other, the adjacent inner edges of the adjacent Seitenbretthälften.

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 producing a multilayer wood composite panel may be given a sequence of the following manufacturing steps: a.) Producing two with movement grooves provided dried cover plates according to a manufacturing variant of the invention; B.) Optionally applying an adhesive layer on the verse with Bewegungsnuten Henen side surface of at least one cover plate; C) Aufeinanderlegen two provided with movement grooves cover plates, wherein the

Movement grooves are preferably arranged offset to one another on the inner surfaces lying in the composite preferably crosswise to each other, as well as. 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 wood composite plate, for example, by applying an adhesive layer on both of them provided with Bewegungsnuten insides, then stacking and final compression to a first composite wood panel to be made.

A further variant of the method according to the invention for producing a middle ply plate in a multi-ply wood composite plate is expediently defined by a sequence of the following production steps: a.) B.) C.) [0063] d. 0064] e.) F.) G.) H.) I.) [0068] i.

Selecting and sorting saw-sawed longwood parts such as side boards, center boards, center boards, square timber planks, crosswood planks and / or center planks;

Arranging in each case at least one drying groove on opposite outer surfaces of the saw-sawed long wood parts;

Drying the long wood parts up to a target moisture content of not more than 15% moisture, preferably from 7% to 13% moisture;

Optionally, leveling the dried lumber pieces;

Optionally trimming 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;

Lateral juxtaposition of the dried Langholzteile, which are optionally 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

Lining side by side and at least partially superimposed dried Langholzteilen, which are optionally spent in a mutually rotated and / or fallen position, into a multilayer composite panel, said provided with drying grooves outer surfaces of the dried Langholzteile are respectively oriented to the outer surfaces of the multilayer composite panel;

Applying adhesive between adjacent juxtaposed logs;

Bonding the areas of the longwood parts under pressure with adhesive and 6/26

§ & md > i $ chebtesiitaat AT13 575U1 2014-04-15 j.) Connecting the long wood pieces to a glued center panel.

For the production of middle layer plates 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 poor quality. The long wood parts are glued to one or more middle layer plates after the aforementioned manufacturing steps, which form the core of the multilayer wood composite board.

In a further development of the invention, a method for producing a multilayer composite wood panel by a sequence of the following manufacturing steps is given: a.) Producing two provided with Bewegungsnuten dried cover plates according to a manufacturing variant of the invention for such cover plates; B.) Producing at least one Dried Mittella geplatte provided with drying grooves according to a manufacturing variant according to the invention for such middle layer plates; C.) Applications of 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) Aufeinanderlegen the cover plates and the at least one center plate to a plate composite, so that the cover plates delimiting the at least one central plate plate from the outside and each having the moving grooves side surfaces of the cover plates in the interior of the plate composite, wherein the movement grooves or drying grooves adjacent Layers of the cover plates and the at least one center-plate plate are each arranged crosswise offset from one another; E.) Optionally at several center plate plates arranging adjacent center position plates each with each other crosswise staggered wood fiber directions and / or with an angular offset, whereby locking layers of individual center layer plates relative to the outer cover plates are formed; and f.) joining the cover plates and the at least one middle layer plate to a second composite wood plate, preferably under the action of a surface pressure.

In this embodiment variant, in the case of a plurality of center-plate plates, the adjacent center-plate plates are each offset in a cross-wise manner relative to one another. The joint directions or Längsverbindungsprofilrichtungen between adjacent side boards, center boards or planks within a central layer plate are also crossed by the crosswise arrangement of the plurality of center plate plates, which is why locking layers of individual center plates against the outer cover plates form. 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. 1 shows an isometric view, obliquely from the front, of a first exemplary embodiment of a wood composite panel according to the invention with two cover panels glued to one another; [0080] FIG. [0081] FIGS. 2 and 3 each in isometric views obliquely from the front, a second and third embodiment of a wood composite panel according to the invention, each having a plurality of center panel plates; Fig. 4 is a sectional view in profile arranging drying grooves in one

Long piece of wood; 7.26

SsferocbiKfcts pitenterct AT13 575U1 2014-04-15 - [0083] FIGS. 5A to 5C each in sectional views in profile Details of individual cover plates; [0084] FIGS. 6A to 6C show sectional views of details of lumber pieces for the production of a middle ply plate; Figures 7 and 8 respectively in isometric views obliquely from the front further Ausfüh approximately examples of wood composite panels according to the invention with a plurality of central layer plates. 9 and 10 respectively in frontal views in cross-section Variants of an inventions to the invention wood composite board with a center platen, which is made of halved and partially edged and re-glued 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 middle layer panels which are made of halved and partially trimmed round wood and another center panel as a barrier layer; FIG. 12 is a sectional view in profile of a wood composite panel according to the invention with a center panel of crosswood planks; FIG. 13 in a sectional view in profile from the front center panel of a fiction, contemporary wood composite panel without cover plates. 14 shows a sectional view in profile of a wood composite panel according to the invention with two thinner cover panels and three center panel panels, each made of crosswood planks; FIG. 15 shows a schematic sketch of side board goods with trunk-parallel as well as halved with trapezoidal division and a shorter profile bevel of the second, wider half for increasing the yield; FIG. 16 is a sectional sketch of a detail of the cross section of a tree trunk for comparison of different efficient utilization solutions of a tree edge length with a profile slope of axially parallel roundwood division; FIG. 17 shows, in a simplified sectional sketch, the utilization difference of sidewalls profiled in parallel through continuous board length and trapezoidal; FIG. FIG. 18 shows, in a simplified sectional sketch in cross-section, a detail of FIG

Round timber profile of a tree trunk in comparison of different Besäumungsprofi-le with the slopes of the braid, middle and floor side of profiled sidewalls, the drying grooves in the middle of the board are already incorporated on the square timber before separating the side boards.

Fig. 1 shows in an isometric view obliquely from the front a first embodiment of a wood composite panel 1 according to the invention with two cover plates 2 glued together. The two cover plates 2 each have continuous outer surfaces 3, which are embodied here, for example, sawn. 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 made of several juxtaposed each with essentially the same wood fiber direction 40 side panels 20, wherein the side boards 20 are provided with a board thickness 21 each at their narrow sides with a longitudinal connection profile 22 and bonded together on the narrow sides to a flat cover plate 2 are. The side boards 20 are here aligned in each case with the same length, whereby in each case after 8/26 a side board length, a continuous cross-connection profile 23 transversely to the longitudinal direction of the side boards 20 occurs. The cross-connection profile 23 is embodied here as a general wedge-tooth connection that extends across the width and offers the advantage that the strength of each individual cross-connection profile 23 can be checked by a tensile test in the longitudinal direction of the cover plate 2. 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 the upper cover plate 2 in FIG. 1 with respect to the lower cover plate 2, as well as their longitudinal connection profiles 22 and cross connection profiles 23 are each arranged crosswise to each other. The profile shows the annual ring layers 41 of the side boards at the front cutting edge. In the composite of the glued together cover plates 2 thus a particularly high-quality, torsion-resistant wood composite panel 1 is provided with a total thickness 24. 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 wood composite board 11 according to the invention each with a plurality of center plate plates 12. In Fig. 2 are three center plate plates 12 between the two cover plates 2. The three center plate 12 have here at their Outside surfaces 13 each have drying grooves 16 on both sides 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 layer plates 12, individual layers of the center layer plates 12 form barrier layers 15, which are arranged at right angles to the cover plates 2 from their wood fiber direction 40 or from the direction of the longitudinal connection profiles 22 or the division surfaces 29 between adjacent center boards 20 , Such inventive 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 adjacent to the central 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 middle center plate 12 at both 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 middle layer plates 12 are glued together and with the outer cover plates 2 by means of intermediate adhesive layers 10 each with each other flat. The cover plates 2 used here are provided with movement grooves 6 only on their inner surfaces 4.

In the wood composite panel 11 shown in FIG. 2, the wall thicknesses 14 of the center layer plates 12 are substantially equal to the wall thicknesses 5 of the cover plates 2. The total 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 plate 12th

In contrast, in Fig. 3, 12 long wood parts 25 are glued together with a larger wall thickness 14 as the middle center plate 12. As central center plate 12 here, for example, center planks 28 are glued together in each case at their straight dividing surfaces 29 with adhesive layers 10. On the outer sides 30 of the center planks 28 each drying grooves 16 are milled. The outwardly adjacent center plate plates 12 are each arranged as a locking layers 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 Langholzteil 25. Milling tools 34 with different cutting profile engage here in the Langholzteil 25 to form drying grooves 16 a. On the left is a picture

fetus «camouflages AT 13 575 U1 2014-04-15

Drying groove 16 shown with a substantially round groove bottom 33.

On the right in the image of Fig. 4, a drying groove 16 is shown with a polygonal profile as the groove bottom 33. 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 their narrow sides and glued together on the narrow sides 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 movement grooves 6 shown in FIGS. 5B and 5C furthermore offer the advantage that the heat-insulating effect of such cover plates 2 is improved by the air cushion enclosed in the grooves 6.

FIGS. 6A to 6C each relate to details of a log portion 25, for example a section of a center beam 28. In FIG. 6A, a drying groove 16 is arranged as an opposite double groove on the center core 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. In order to divide out two core boards after drying, therefore, three drying grooves 16 are provided on each outer side of the center pile 28 here.

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 can be prepared prepared in such a way faster through the drying steps and processed in the center platen.

In Fig. 7, a further variant of a wood composite panel 11 according to the invention with three inner central layer plates 12, which are bounded in each case 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 plate 11 with a centrally arranged center plate 12 from opposite pairs arranged one above the other, each wedge-shaped Langholzteilen 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. 10/26

FIG. 9 illustrates a first variant of a wood composite panel 11 according to the invention with a center panel 12, which is produced in a natural state from half-cut round timber sectioned in sections. For this purpose, halved square timber planks 26 are each provided at 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 beneficial with wood in the core area beginning 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 center ply plates 12 form the core of the wood composite plate 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 variant of a wood composite panel 11 according to the invention, in which a total of five layers, each in screed dimension, are connected to each other similar to log house planks. A centrally arranged, central central ply plate 12 and two outer cover plates 2 delimit two middle ply plates 12, which are arranged therebetween or in a staggered manner, from halved two-ply planks 26. The square timber planks 26 are each provided with drying grooves 16, which in double-groove design are respectively provided on both outer sides 30 of the long wood parts 25 are arranged and thus provide for a rapid drying of target moisture and low residual stresses in the composite adhesive bonded with 10 squared timber 26.

12 shows a wood composite panel 11 according to the invention with a center panel 12 made of crosswood planks 27. The crosswood planks 27 with an 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 according to the invention 11. Three center-layer plates 12 each have a wall thickness 14 are shown here without the otherwise still outside adjacent cover plates 2. 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 wood composite panel 11 according to the invention with two thinner cover plates 2 and three center plate plates 12 each made of cross-wood 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 plates 12 with respect 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 pitch-as shown in FIG. 15 above-or with a trapezoidal-profiled division-as shown in FIG. 15 below-to cover plates 2 or center-side plates 12. For this purpose, the center boards 17 are, for example, halved in length, placed against each other according to their different longitudinal connection profile 22, and joined together

jBtesiiKat AT13 575U1 2014-04-15 glued together.

Fig. 16 shows in a simplified sectional diagram in cross section comparatively 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 profiled in a continuous board length parallel to the side board 20, which is shown in section, and a trapezoidal profiled side board 20 'with a smaller wood waste, which is shown by dashed lines, and punctures a shorter profile slope 22 with higher yield of the second half board.

Fig. 18 illustrates in a simplified sectional sketch in cross-section a round timber cutout in comparison of different Besäumungsprofile profiled sidewalls. 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 the Spanenkantholz before separating the side boards 20, possibly also with a deviating to Kantholz axis Achsla-ge the drying groove 16, which results from the optical measurement and is set in the future Brettmitte or board axis. 12/26

AT13 575U1 2014-04-15 LIST OF POSITION NUMBERS: 1 wood 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 panel comprising at least a center plate 12 center plate 13 outer surface of the middle plate 14 wall thickness of the center plate 15 blocking position 16 drying groove 17 width of the drying groove 18 depth of the drying groove 19 distance between drying grooves 20 side board, center board 21 Board thickness of the side board or middle board 22 longitudinal connection profile between adjacent side boards or center boards 23 cross connection profile or Total wedge tine connection 24 Total thickness of the wood composite board 25 Long wood part of a middle layer plate 26 Timber board 27 Crosswood board 28 Center board 29 Division surface or longitudinal profile in sawing direction 30 Outside of one Long wood part 31 Sharp edge (trimmed) 32 Forest edge 33 Groove base 34 Milling tool 40 Wood fiber direction 41 Annual ring layer 13/26

Claims (25)

AT13 575U1 2014-04-15 Claims 1. Multilayer composite wood panel (1, 11), comprising two cover plates (2), characterized in that the cover plates (2) are each provided with movement grooves (6) on their inner surfaces (4) which are arranged in the composite are. 2. wood composite panel (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 in each case 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) with each other crosswise offset movement grooves (6) glued to a wood composite (10). 4. wood composite panel (1, 11) according to any one of claims 1 to 3, characterized in that the cover plates (2) are provided at their outside in the composite outer surfaces (3) each with movement grooves (6). 5. wood composite panel (1, 11) according to one of claims 1 to 4, characterized in that the movement grooves (6) has a Bewegungsnutbreite (7) 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 panel (1, 11) according to one of claims 1 to 5, 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 panel (1, 11) according to one of claims 1 to 6, characterized in that the movement grooves (6) has a Bewegungsnuttiefe (8) of less than 50%, preferably less than 40% of a wall thickness (5) of a cover plate (2) exhibit. 8. wood composite panel (1, 11) according to one of claims 1 to 7, characterized in that the movement grooves (6) in cover plates (2) with a target moisture content of 15% moisture, preferably from 7% to 13% moisture, incorporated , 9. Multi-layer wood composite board (11) according to any 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 any one of claims 1 to 10, characterized by an odd number of center plate plates (12), wherein adjacent center plate plates (12) each with crosswise offset drying grooves (16) are glued together. 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 in that the at least one central layer plate (12) made of long wood parts (25), for example, side boards (20), middle boards (20), center planks, square timber planks (26), Crosswood planks (27) and / or center planks (28) is formed. 14/26 (»TirrecisisAtiPs AT13 575U1 2014-04-15 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 in that square timber planks (26) are arranged in each case by opposite juxtaposition to a central platen (12), each alternately a trimmed sharp edge (31) of a first timber screed (26) next to a forest edge (32) of an adjacent second timber beam (26) comes to rest. 18. wood composite panel (11) according to any one of claims 9 to 17, 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 in that the drying grooves (16) on the at least one center plate (12) each have a Trocknungsnuttiefe (18) which at least a quarter, preferably at least one third, one Wall thickness (14) of the center plate (12). 20. wood composite panel (11) according to any one of claims 9 to 19, 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 panel (11) according to any one of claims 9 to 20, characterized in that a moisture content of the long wood parts (25) of the central layer 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 any one of claims 1 to 21, characterized by a sequence of the following manufacturing steps: a. ) Optional selection of side boards (20) with a board thickness (21) of at least 15 mm, preferably of at least 20 mm; b. ) Attaching a drying groove (16) respectively on a side surface of each selected side board (20) with a cutting or milling device (34), wherein the drying groove (16) is 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 target moisture content of at most 15% moisture, preferably from 7 to 13% moisture; d. ) Leveling the dried side boards (20) and, if necessary, reducing board thickness (21); e. If appropriate, 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 with means of a cutting or milling device (34); H. ) Trimming each side board (20) at its longitudinal edges, wherein in each case lateral longitudinal connection profiles (22) are obtained; i. ) Dividing the trimmed side board (20) along its drying groove (16) or Füh tion groove means of a cutting or milling device (34); j. If appropriate, turning and / or hitting the split side boards (20) and seitli ches juxtaposition of the board parts (20) as a joining partner; 15/26 AT 13 575 U1 2014-04-15 k. ) Orders of an adhesive layer (10) on the lateral longitudinal connection profiles (22) of the side board parts (20) and / or on the straight dividing surfaces (29); l. ) Side juxtaposition and bonding of the side board parts (20) to a 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 a cutting or Fräsvor direction on at least a portion of a side surface (4) of the dried cover plate (2). 23. A method for producing a multilayer composite wood panel (1) according to any one of claims 1 to 8, characterized by a sequence of the following manufacturing steps: a. ) Producing two dried cover plates (2) provided with movement grooves (6) according to a sequence of the production 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. ) Placing two cover plates (2) provided with movement grooves (6), wherein the movement grooves (6) are preferably arranged so as to be offset in a crosswise manner from each other on the inner surfaces (4) lying in the composite; d. ) Joining to a first composite wood panel (1) preferably under the action of a surface pressure. 24. A method for producing a central layer plate (12) in 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. Selecting and sorting saw-sawed longwood 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 in each case 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 target moisture content of not more than 15% moisture, preferably from 7% to 13% moisture; d. ) If necessary, equalize the dried longwood parts (25); e. ) Optionally trimming the dried Langholzteile (25) optionally under Anbrin gene a guide groove on one side of each Langholzteils (25), wherein with the aid of the guide groove profiling of the Langholzteils (25) is symmetrical to its solid cross-section; f. ) Side juxtaposition of the dried Langholzteile (25), which, if necessary, spent in a mutually rotated and / or fallen position, allied to a single-layer plates, wherein the drying grooves (16) provided with outer surfaces (30) of the dried Langholzteile (25) respectively form the outer surfaces (13) of the plate composite, or g. ) Side juxtaposition and at least partially superimposed ge dried long wood parts (25), which may be spent in a mutually rotated and / or fallen position, to a multilayer panel composite, wherein the drying grooves (16) provided with outer surfaces (30) of dried Langholzteile ( 25) are respectively oriented to the outer surfaces (13) of the multilayer plate composite; H. ) Divide jobs of adhesive (10) between adjacent juxtaposed long wood (25); i. ) Adhering 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). 16/26 fotweiebischis fet «disguises AT 13 575 U1 2014-04-15 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 dried cover plates (2) provided with movement grooves (6) according to a sequence of the production steps a.) To n.) Of method claim 22; b. ) Producing at least one with drying grooves (16) provided dried means position 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 the at least one central ply plate (12) and / or on the inner surfaces (4) of the cover plates (2) provided with movement grooves (6); d. ) Laying the cover plates (2) and the at least one center plate (12) to a plate composite, so that the cover plates (2) delimit the at least one central plate (12) from the outside and the movement surfaces (4) provided with movement grooves (4) of the cover plates (2) into the interior of the plate composite, wherein the movement grooves (6) or drying grooves (16) of adjacent layers of the cover plates (2) and the at least one center plate (12) are each arranged crosswise offset from each other; e. ) If necessary, with several center-plate plates (12) arranging adjacent with tellageplatten (12) each with crosswise staggered wood fiber directions (40) and / or with an angular offset, whereby locking layers (15) of individual center-plate (12) relative to the outer cover plates (2) be 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. For this 9 sheets drawings 17/26