DE102008022805A1 - Wavy veneer board for use with lightweight board, in e.g. furniture construction, has laminar wood veneers stuck with each other, where veneer board exhibits waveform e.g. zigzag waveform, viewed in longitudinal section - Google Patents

Abstract

The veneer board (20) has laminar wood veneers (10) stuck with each other in parallel oriented fiber direction, where the veneer board exhibits waveform e.g. sinusoidal waveform, zigzag waveform and trapezoid waveform, viewed in longitudinal section. The fiber direction of the veneers is aligned in longitudinal direction of the veneer board. A waveform intermediate layer of a lightweight board is designed such that the veneer board lies on both the sides over a wave crest (14) and a wave trough (16). Compression areas (12) are produced with a roller, which is moved transverse to the veneers. An independent claim is also included for a method for manufacturing a lightweight board.

Description

The The invention relates to a corrugated board and a lightweight board. Moreover, the invention relates to a process for the preparation a corrugated board and a method for producing a lightweight board.

Such a lightweight board and a process for their preparation are for example from CH 204572 known. Here, a corrugated wood, which consists of a laid in waves wood veneer, laminated on both sides with paper, metal foil or other materials and then expanded by gluing the corrugated heads of laminated corrugated wood with flat lanes to a lightweight board.

Often but are the costs of laminating the corrugated wood, which to avoid splintering, cracking or even Breaking the wood veneer is applied, due to the cost of the laminating material is not negligible. The used Laminating materials have moreover because of their Texture and their small thickness no significant own Load capacity.

Such or similar in construction similar lightweight panels can be used in a variety of applications: So wood panels are used with an intermediate layer, for example in furniture or in a more massive form in house building. In furniture and house construction are often used as an intermediate paper honeycomb. There are then also different types, inserted between the outermost layers of wood and glued liners applied, which, such as from the DE 10 2005 014 276 A1 known to have a honeycomb structure made of aluminum. In the course of the increase of ecological aspects in house and furniture construction the mixture of different materials with the plate production (for example outer layers of wood and intermediate layer of aluminum honeycombs) seems questionable at least against the background of the biological degradability.

Become multilayer wood panels with an intermediate layer, for example provided for the furniture manufacturing market, so the manufacturer is generally on a variety of different Instructed plate thicknesses. He then needs this through an optional to provide elaborate planning and to provide it in a warehouse.

The The invention therefore has the task of a self-stable Wellfurnierplatte and to provide lightweight board, by their properties a simpler, more economical and more ecological Allow use. The object of the invention is also a Process for producing such a corrugated fiberboard and such to provide a lightweight board.

With regard to the corrugated veneer board itself, the object is achieved in that at least two wood veneers glued together in a planar manner form a corrugated fiberboard, the corrugated fiberboard having a wavy shape seen in longitudinal section. Such a corrugated fiberboard thus sometimes has the following advantages:
The corrugated fiberboard according to the invention prevents splintering or cracking or unwanted breaking of the corrugated wood veneer by blocking by at least one second wood veneer layer. Shut-off provides the same advantages as lamination, with the added benefit of increasing the stability of the corrugated veneer through its own load capacity of the second wood veneer. At the same time the economically more economical material wood is used as shut-off material. It is also possible to further increase the number of wood veneers of the corrugated board and thus more selectively influence the strength of the corrugated board.

is the waveform is sinusoidal in longitudinal section, zigzag or trapezoidal, this brings with it the advantage of great variability yourself. Including in the context of the invention, the possibility understood, the carrying capacity of the corrugated veneer over to influence the different design of the corrugated board. Is the corrugated board by continuous zigzag or trapezoidal folds formed or as a continuous sinusoidal Shaft shaped, then, for example, the amplitude and / or wavelength be varied. This can also affect the thickness of the corrugated board be like their stiffness.

Become at least two wood veneers with differently oriented Fiber direction glued together, so increase the design options Farther. Depending on the purpose of use are thereby Wellfurnierplatten with bending torsional couplings of different characteristics built up. In the bending torsional coupling, for example, the component responds to a bending load with torsion, which may be may be desired. Preferably, however, adjacent ones become Wood veneers with mutually orthogonal orientation of the fiber flow glued together. Own the two or more namely glued together wood veneers over it In addition, a symmetrical structure with respect to their common Center plane, this has the advantage of isotropic material behavior such a Wellfurnierplatte. Shrinkage and swelling behavior are then the same for example in the longitudinal and transverse directions big and a bending of the corrugated sheet solves no simultaneous torsion.

Become at least two wood veneers with parallel grain direction glued together, creates an anisotropic Wellfurnierplatte, the For example, more swells transversely to the wood fiber direction or disappears as being longitudinal to the wood fiber direction. This attribute may be desired depending on the purpose and therefore useful be.

is the fiber direction of the veneers in the longitudinal direction of the Wellfurnierplatte aligned, that is perpendicular to the wavefronts the wave crests and troughs, this increases the strength of the corrugated board compared to a structure, where the fiber direction is parallel to the wavefronts.

In terms of the lightweight board, the invention task is solved by that the corrugated veneer invention over the wave crests and wave troughs of the waveform on top layers abuts and over the wave crests and wave troughs is glued to the cover layers.

The Advantages of simple construction and economical construction thereby on the lightweight board according to the invention. In addition, the rigidity and strength increases the lightweight board by gluing with the two outer layers, for example, their use in different areas of the House building (use for the construction of interior doors, Use as a non-load-bearing wall in the interior or for formwork purposes in concreting tasks), but also in furniture making possible.

About that In addition, the lightweight board has the wave crests and wave troughs Other advantages. The cavities caused by the gluing The Wellfurnierplatte arise with the cover layers, make the Lightweight panel in the first place easily, which is a relief whose transport means, be it on a building site as a formwork panel, during further processing in a workshop or elsewhere. Due to the effective transport of such invention Lightweight panels are compared with massive wood panels costs saved. In addition, the structure of the lightweight board according to the invention brings a very enclosed by the air trapped in the cavities good thermal insulation effect with it. The inventive Lightweight panel has the advantages of low weight and the good thermal insulation effect still the advantage the low cost of exclusive use of the material wood for the corrugated board.

are the cover layers for gluing with the inventive Lightweight board used, also made of wood, so the lightweight board is consistently made of the same material built up. This is the aspect of environmental sustainability maintained the corrugated board. Such a lightweight board is ecological harmless, as long as the adhesive or glue used biological is degradable.

are the outer layers moreover built up in several layers, so On the one hand, the outer layers can be finished improve the visual appearance of the lightweight panel and / or on the other hand the Strength properties of the lightweight panel further influenced become.

If as cover layers or outer layers all common Wooden boards such as chipboard, plywood boards, etc. can be used advantageously industrial production be made of very different plates. Another Simplification also constitutes exclusive use of wood veneer, that is a construction of the lightweight board from a corrugated veneer board and top layers of wood veneer tapes. Then the manufacturer is only dependent on wood veneer and can through the above variability a variety on different lightweight panels for a variety of Create applications.

The Cover layers and the corrugated fiberboard glued therewith can have a curved surface. The corrugated veneer board can be given a certain flexibility by being built in one direction and therefore in a curved molding press with the two Cover layers are glued. So in one direction curved shaped wood panels or molded wood parts are produced, fulfilling the requirements of modern (interior) architecture become. It should be noted that a relatively large flexibility only in one direction is possible and perpendicular to it very much is limited, what the design spherical Curved shaped wood panels only conditionally possible power.

In terms of of the process for producing a corrugated fiberboard is the Problem solved by providing a method becomes, with the at least two wood veneers flat with each other to one, seen in longitudinal section, wavy Corrugated veneer be glued. The surface bonding or gluing should be enough large areas Contain the contact surfaces and ideally over the entire surface respectively. To further increase the stability can also be a gluing or gluing of more than two wood veneers are made.

Of the Advantage of this method is that by gluing at least two wood veneers on a lamination by paper, aluminum foil or other non-woods can be waived and for that to shut off a sustainable, biodegradable and relatively cheap material is used.

He follows for the production of the zigzag or trapezoidal corrugated fiberboard before bonding one rectilinear compaction of the wood veneer across or along the wood veneers at predetermined intervals, so receives the user the possibility of the wood veneers before the Process step of folding as possible to save space to store. The compression can, for example, over small Rolls running transversely or longitudinally to the wood veneer take place. The distances between two compaction depend which shape the corrugated board has after folding should. On the one hand, this can be a pure zigzag shape. In this Case, the distances are to be chosen so that the Distance between two compressions at a desired wavelength also leads to the desired height of the plate. On the other hand, a trapezoidal shape may be desired, which, depending on the required plate height or width the contact surfaces for possible cover layers, an irregular spacing of the densities required.

He follows in the case of the zigzag or trapezoidal Corrugated board before bonding a straight-line material removal the wood veneer across or along the wood veneer at predetermined intervals, so is a process alternative with in principle the same Possibilities as in a compression of the wood veneers provided. The material removal can, for example by means of Grinding or milling machines are done and enabled It also, relatively thick wood veneers for further processing too To provide corrugated veneer boards.

happens the compaction or material removal of the wood veneer across or along the wood grain course of the wood veneers in predetermined Distances, so this allows zigzag or trapezoidal corrugated veneer panels made of adjacent wood veneers build up mutually changing fiber flow directions. there is the compaction or material removal on a wood veneer along and at its neighboring wood veneer across to Fiber course direction exercised. It should be noted that one Compaction or material removal parallel to the grain direction be very careful because of the risk of tearing and splintering is high on thin veneers.

Subsequently be the wood veneers at the compacted areas or at the Places where material has been removed, folded or kinked, so that a kind of pleated ribbon is created. The kinking or folding poses a very simple and effective form of further processing dar. It should also be ensured that by bending or wrinkles the fibers are not severed.

Become the wood veneers in the compacted areas, or in the places where material has been removed from the wood veneers, folded, this is done in a simple and effective way.

Become the wood veneers folded so that seen in longitudinal section a zigzag or trapezoidal shape is created, so are the manufacture the veneer panel needed wood veneer directly, in a simple and effectively provided for further processing.

He follows the deformation of the for the production of the Wellfurnierplatte required wood veneers over two opposite ones Press tables on their opposite sides the matching positive and negative forms of education have the desired waveform, so the production a Wellfurnierplatte with sinusoidal waveform allows. The concrete sinusoidal shape of the waves can be chosen as desired vary. It is only about the positive and negative Forms of press tables determined. A press table is preferably Positionally positioned and the second press table is preferably divided into several single stamps.

Become the single punch so independent of each other in the counter-forms of the stationary press table inserted, so will the desired number of wood veneers, first with Glue must be occupied, first between one brought first single punch and its corresponding counter-mold and thereby deformed and glued. Following this first single punch movement moves the adjacent Einzelpressstempel in its corresponding Counter-shape of the fixed press table and then the adjacent stamp of the second single punch, etc. On this Way is a slipping of the wood veneer material by the deformation is additionally required allows. Without this sequence of single stamp movements would the wood veneer suffer from great tensions and at one simultaneous retraction of the ram tearing. The necessary sequence of single punch movements for gluing is in principle possible in two different ways: One is the first single punch in the middle of the press table lie and thus after the first single punch both adjacent Single punch and then their neighboring punch a movement begin, etc., so that the sequence finally from the middle of Pressing down to its two lateral edges running. On the other hand, the first single punch on lie one edge of the press table and the sequence of movements of the adjacent Single stamp goes all the way to the opposite Edge of the press table.

In principle, for bonding or Verlei It should be noted that, from the point where gluing is desired, the glue or adhesive must be introduced between the veneers by means of an adhesive coating device. This can be done by brushing, spraying or the like and must be done at least on one of two veneer surfaces to be glued. Depending on what glue or glue is used, it may be necessary to allow shorter or longer deformation and bonding times. Since the contact pressure during the gluing / gluing also plays a role, this can in principle be adjusted by two different methods. On the one hand, it is conceivable that the desired contact pressure is selected via an adjustment of the path or a gap distance between individual press dies and corresponding countershapes, on the other hand, a force control lead the individual dies in the corresponding counter-mold and apply force until a certain contact pressure is reached. A heat effect on the pressing elements can be done electrically or otherwise and accelerate the time course of the bond, for example. After bonding and, where appropriate, curing of the adhesive, the resulting corrugated board can be separated from the non-glued, residual veneers in the feeding area to the press tables by a cutting or separating device from the rest of the wood veneer. It may be that the device for adhesive occupation must be carried along according to the single punch movement in order to prevent too large sags of the wood veneer and the associated unintentional course of adhesive.

Become the surfaces of the wood veneers intended for bonding through a facility until entry into the positive and negative Forms of single punch held at a distance, so can one premature and unwanted bonding of the press tables supplied Wood veneers are prevented. The device can be considered a comb-like Separator be formed. During a mission In the press table, this separator is preferably as well the adhesive applicator simultaneously with the single punch movement of the center of the press table towards the edges or from one edge to the other.

The Deformation of the wood veneers for the production of the corrugated veneer board can also use two press rollers on their lateral surfaces be made in accordance with trained negative forms. there will the desired number of wood veneers first introduced between such rolls. The distance between the two roller rotation axes must it may be possible to change it as appropriate how many wood veneers are to be glued together. Thereby a gap between the two negative forms can be adjusted. This also allows varying the deformation pressure, the learn the wood veneers during the bonding. Following the Inserting the wood veneers between the rollers can be done with the deformation and the gluing or gluing are started. This must be from the Point from which gluing is desired, the glue or glue is inserted between the veneers. This can be over Spreading equipment, spraying equipment, or the like take place and must be glued on at least one of two Wood veneers happen. By turning the wood veneers through the gap between the intermeshing negative forms of Rolling is the wood veneers under pressure and heat the appropriate waveform impressed under bonding. Depending on, What kind of glue can be used? be required, shorter or longer deformation and allow bonding times. This can be about the rotation speed the rollers are affected. As the contact pressure during the gluing / gluing also plays a role, this can already over the mentioned adjustment of the gap distance (about Rotational axis distance of the rolls) also taken into account and adapted become. The effect of heat can be electrical or otherwise and accelerate the time course of the bond, for example. After bonding and, if necessary, hardening of the adhesive, the resulting Wellfurnierplatte of the not glued wood veneers by a corresponding cutting edge or separating device to be separated. A process with rollers allows it, with a relatively manageable dimension the required equipment (rollers, adhesive application system etc.) to produce corrugated veneer boards of great length. This length is in principle only by the wood veneers determined and can at the expense of a small discontinuity in the veneer by an overlap / stint of the Wood veneers theoretically continue indefinitely.

Become the wood veneers glued together so flat that the fiber directions of at least two adjacent wood veneers oblique to each other, so increase the possibilities the design of the corrugated veneer continue. Preferably become Wellfurnierplatten with an alternately mutually perpendicular Alignment of the grain of several wood veneers and one to their Center-plane symmetrical structure glued or glued, as this has the advantage of isotropic material behavior. The source and Shrinkage behavior is then for example in longitudinal or Transverse direction pronounced and strong by blocking reduced. This applies to both the zigzag, the trapezoidal as well as the sinusoidal waveform the corrugated veneer boards.

Become the wood veneers glued together so flat that the fiber directions of at least two adjacent wood veneers in parallel to each other, an anisotropic Wellfurnierplatte, which swells more strongly, for example, across the wood fiber or disappears as lengthwise to the wood fiber. This property can depending on the intended use and then of use be. This also applies to the zigzag, the trapezoidal as well as the sinusoidal waveform the corrugated veneer boards.

In terms of the method for producing a lightweight board, the a Wellfurnierplatte invention as an intermediate layer, the task is solved by that a method with the features of claim 24 is provided becomes. This process increases the rigidity and strength of the Lightweight panel compared to the corrugated board.

It It is understood that the glue or glue also on the wave crests and troughs can be applied to the plant come with the topcoats. If this is the case, so must the outer layers for gluing or gluing not mandatory even be covered with glue or glue.

Becomes the gluing of the corrugated board with the cover layers in one made curved die, so can do so simply curved and to some extent also spherical curved shaped wood panels are produced.

in principle is to all bonds according to the invention too Notice that these are over all common adhesives can be done. For the processing of wooden materials For example, very often used adhesives are different Glues.

Further Features and advantages of the invention will become apparent from the following Description of embodiments of the invention, based on Figures of the drawing which show details essential to the invention, and from the claims. The individual features can each individually or in any combination be realized in a variant of the invention.

preferred Embodiments of the invention are in the drawing shown schematically and are described below with reference to the Figures of the drawing explained in more detail. It shows:

1A to 1C Intermediate steps in the production of zigzag or trapezoidal corrugated veneer boards;

2A . 2 B Intermediate steps of producing a lightweight board;

3A to 3D an overview of various forms of corrugated board;

4A . 4B an overview of the structure and shape of lightweight panels of the invention;

5A . 5B the main process steps in the production of a corrugated veneer plate by means of press tables;

6 a perspective view of a press with Einzelpressstempeln and intervening wood veneers.

In the 1A is with 10 In sections, a wood veneer shown in longitudinal section, which has several compaction sites 12 having. These compaction sites 12 are produced in a first process step, for example with a roller, which is transverse to the wood veneer 10 moved and this at the compression points 12 compresses without breaking it up.

In a second process step, by the 1B is hinted at, becomes the wood veneer 10 at the compression points 12 kinked or folded, so that, as in the 1B shown in longitudinal section, a zigzag shape with wave crests 14 and troughs 16 arises as a wavy wood veneer 10 can be used.

In a further process step, by the 1C indicated are two wavy wood veneers 10 flat with each other to a Wellfurnierplatte 20 glued.

In the 2A becomes the first process step for gluing or bonding the corrugated board 20 with an upper cover layer 32 explained in a longitudinal section shown in sections. The corrugated veneer board 20 is doing in a molded press side 22 a press 26 inlaid, so the wave crests 14 and troughs 16 of the zigzag pattern into their corresponding counterforms of the molded press side 22 protrude. Then either the top cover layer 32 in the places where they are on the crests of the corrugated board 20 comes to rest, covered with adhesive, or the Wellfurnierplatte 20 is covered with glue on her wave mountains. Subsequently, the upper cover layer 32 on the corrugated board 20 placed and positioned so that in the next step, the flat pressing side 24 the press 26 under bonding pressure and, where appropriate, heat the bonding performs. It is in principle conceivable that one of the two pressing sides 22 . 24 is moved to the other, or both are mobile. Likewise, both, only one or possibly none of the press pages on a device for Wär Depending on what is desired for a temporal gluing process.

In the 2 B the part of the process is indicated, in which the bonding of the corrugated board 20 with already applied on one side topcoat 32 with the second, lower cover layer 34 is made. For this purpose, for example, another flat pressing side 24 required, which also performs a gluing or gluing under pressure and optional heat exposure.

In the 3A to 3D are different embodiments of the corrugated board 20 shown how they can be made by pressing tables. In the 3A is for example a corrugated veneer board 20 shown, consisting of three wood veneers 10 is constructed and has a relatively short wavelength. In the 3B however, the corrugated veneer board is 20 only from two wood veneers 10 constructed and has a longer wavelength. In the 3C is a slightly rounder shape of the waves to see and finally in 3D a trapezoidal shape. The 3A to 3D show the variety of possible corrugated boards 20 , which can be realized with the method according to the invention.

In the 4A is a finished lightweight board 30 shown, from a Wellfurnierplatte 20 with wave crests 14 and troughs 16 and a multi-layer upper cover layer 32 and a multi-layered lower cover layer 34 is constructed. The upper cover layer 32 is the same as the lower cover layer 34 made of wood veneers 10 built, which were additionally glued together. This lightweight board 30 is an example of the construction of only a single similar element, namely the wood veneer 10 ,

In the 4B is another application of the corrugated board 20 shown. Will the corrugated veneer 20 namely in a molding press with the two cover layers 36 . 38 glued, so curved shaped wood panels or molded wood parts can be produced. The gluing of the flexible corrugated board will be done 20 with the molded upper cover layer 36 as well as with the formed lower cover layer 38 analogous to the preparation of the plate used in the 2 shown, only that the press sides 22 . 24 the molding press have the desired curved or curved shape. For the gluing process of the first cover layer 31 In addition, it is also required that one of the curved press sides the corresponding waveform of the desired Wellfurnierplatte 20 has.

The following is based on the 5A and 5B the method explained in which by means of two press tables 44 . 45 the production of a corrugated veneer board 20 is made. These are cross sections through a fixed press table 44 and a movable press table 45 with single stamps 43 shown drawn to illustrate the different single punch movements at successive times. In the 5A the time is shown after the first single punch 41 in the middle of the press table 45 into its corresponding fixed counterform 46 was proceeded and the two wood veneers 10 deformed by it. The adjacent second single stamps 42 stay unmoved. Only in the subsequent process step, which in the 5B is shown, the second single punch 42 in their corresponding counterform proceed to the wood veneers 10 to deform further. During this process, the wood veneers slip 10 from the sides to the middle. During this process, the first single punch remains 41 in his in the fixed counterform 46 moved situation. All single stamps 41 . 42 . 43 drive according to the invention as far as the corresponding countershapes 46 until a desired contact pressure between the wood veneers for the gluing or bonding is achieved.

In the 6 are the for the inventive production of Wellfurnierplatte 20 necessary press tables 44 . 45 shown in a perspective view. The press tables 44 . 45 are shown in a separated position. To recognize are the single punch 43 as well as two wood veneers 10 , which are each spaced apart via separating comb-like means.

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• - CH 204572 [0002]
• DE 102005014276 A1 [0004]

Claims (25)

Corrugated veneer board ( 20 ), characterized in that at least two surface-bonded wood veneers ( 10 ) the corrugated veneer board ( 20 ), wherein the Wellfurnierplatte ( 20 ) seen in longitudinal section has a waveform. Corrugated veneer board ( 20 ) according to claim 1, characterized in that a sinusoidal waveform is provided. Corrugated veneer board ( 20 ) according to claim 1, characterized in that a zigzag-shaped waveform is provided. Corrugated veneer board ( 20 ) according to claim 1, characterized in that a trapezoidal waveform is provided. Corrugated veneer board ( 20 ) according to one of the preceding claims, characterized in that at least two wood veneers ( 10 ) are glued together with differently oriented fiber direction. Corrugated veneer board ( 20 ) according to one of claims 1 to 4, characterized in that at least two wood veneers ( 10 ) are glued together with parallel aligned fiber direction. Corrugated veneer board ( 20 ) according to claim 6, characterized in that the fiber direction of the wood veneers ( 10 ) in the longitudinal direction of the corrugated veneer plate ( 20 ) is aligned. Lightweight board ( 30 ) with a wavy intermediate layer, wherein the intermediate layer in each case on both sides of the wave crests ( 14 ) and troughs ( 16 ) of the waveform on cover layers ( 32 . 34 ) and over the wave mountains ( 14 ) and troughs ( 16 ) with the cover layers ( 32 . 34 ) is glued, characterized in that the intermediate layer as Wellfurnierplatte ( 20 ) is designed according to one of the preceding claims. Lightweight board ( 30 ) according to claim 8, characterized in that the cover layers ( 32 . 34 ) are constructed of wood. Lightweight board ( 30 ) according to claim 8 or 9, characterized in that the cover layers ( 32 . 34 ) are constructed in multiple layers. Lightweight board ( 30 ) according to claim 9 or 10, characterized in that the cover layers ( 32 . 34 ) of wood at least one wood veneer ( 10 ) or at least one chipboard or at least one plywood board. Lightweight board ( 30 ) according to one of claims 8 to 11, characterized in that the cover layers ( 32 . 34 ) and the corrugated fiberboard ( 20 ) have a curved surface. Method for producing a corrugated veneer board ( 20 ), in particular a corrugated veneer board ( 20 ) according to one of claims 1 to 7, characterized by the surface bonding of at least two wood veneers ( 10 ) to a corrugated veneer plate seen in longitudinal section ( 10 ). A method according to claim 13, characterized in that a deformation via a straight-line compression of the wood veneers ( 10 ) at predetermined intervals across or along the wood veneers ( 10 ) takes place before the bonding. A method according to claim 13, characterized in that a processing on a straight material removal of the wood veneers ( 10 ) at predetermined intervals across or along the wood veneers ( 10 ) takes place before the bonding. A method according to claim 14 or 15, characterized in that the compaction or material removal of the wood veneers ( 10 ) transversely or longitudinally to the wood fiber course of the wood veneers ( 10 ) takes place at predetermined intervals. Method according to one of claims 14 to 16, characterized in that the wood veneers ( 10 ) at the densified areas ( 12 ), or where material from the wood veneers ( 10 ) has been removed, kinked or folded. Method according to claim 17, characterized in that the wood veneers ( 10 ) are folded so that when viewed in longitudinal section, a zigzag or trapezoidal shape is formed. Method according to one of claims 13 to 18, characterized in that the deformation of the wood veneers ( 10 ) for the production of the corrugated veneer board ( 20 ) over two opposing press tables ( 44 . 45 ), which have on their opposite sides the mating positive and negative shapes for forming the desired waveform, wherein a first press table ( 44 ) is stationary and a second press table ( 45 ) in several individual stamps ( 43 ), which are divided into the corresponding counterforms ( 46 ) of the fixed press table ( 44 ) are insertable, and that at least two wood veneers coated with adhesive on at least one of their opposite wood veneer surfaces ( 10 ) are glued together under deformation. A method according to claim 19, characterized ge indicates that the single punch ( 43 ) so independently of each other in the counter-forms ( 46 ) of the fixed press table ( 44 ) that the increased demand for wood veneer ( 10 ) for deforming the wood veneer ( 10 ) by tracking the wood veneer ( 10 ) is compensated. Method according to one of claims 19 or 20, characterized in that the intended surfaces for bonding the wood veneers ( 10 ) by a device until entry into the positive and negative forms of the single punch ( 43 ) are kept at a distance. Method according to one of claims 13 to 21, characterized in that the wood veneers ( 10 ) are glued together so flat that the fiber directions of at least two adjacent wood veneers are oblique to each other. Method according to one of claims 13 to 21, characterized in that the wood veneers ( 10 ) are glued together so flat that the fiber directions are parallel to each other. Method for producing a lightweight building board ( 30 ), in particular a lightweight board ( 30 ) according to one of claims 8 to 12, characterized in that first a corrugated veneer board ( 20 ) according to any one of claims 1 to 7 according to the method of any one of claims 13 to 23 and this corrugated veneer board ( 20 ) then then according to the following process steps with outer layers ( 32 . 34 ) is glued: a) inserting the corrugated veneer plate ( 20 ) in such a molded press side ( 22 ) a press ( 26 ), that the wave mountains ( 14 ) and troughs ( 16 ) of the corrugated veneer board ( 20 ) by corresponding counter-forms in the molded press side ( 22 ) are recorded; b) covering the first of the two outer layers ( 32 . 34 ) with adhesive at the points where the wave crests of the corrugated veneer board ( 20 ) on the outer layers ( 32 . 34 ) come to rest; c) application of the adhesive layer ( 32 ) on the corrugated veneer plate ( 20 ), so that the splices of the top layer ( 32 ) on the wave mountains ( 14 ) of the corrugated veneer board ( 20 ) lie; d) bonding the first cover layer ( 32 ) with the corrugated veneer plate ( 20 ) in the press ( 26 ) under contact pressure and heat; e) covering the second cover layer ( 34 ) with adhesive at the points where the troughs ( 16 ) of the corrugated veneer board ( 20 ) on the second cover layer ( 34 ) come to rest; f) placing the previously glued wooden parts in a press ( 26 ) with flat pressed sides on both sides ( 24 ); g) application of the second adhesive layer ( 34 ) on the uncovered side of the corrugated veneer board ( 20 ), so that the splices of the top layer ( 34 ) on the troughs ( 16 ) of the corrugated veneer board ( 20 ) lie; h) bonding the second cover layer ( 34 ) with the corrugated veneer plate ( 20 ) in the press ( 26 ) under contact pressure and heat; i) curing of the adhesive bonds. Method according to claim 24, characterized in that the press side (a) used in 22 ) or the counterforms of the press ( 26 ) into which the corrugated veneer board ( 20 ) for bonding with first a cover layer ( 32 ) is inserted, has a curved shape and the under f) for performing the bonding with the second cover layer ( 34 ) used second pressing side ( 24 ) also has a corresponding curved shape.