EP3075923B1 - Composite wood board with tongue and groove, and use of the same - Google Patents

Description

The present invention relates to a wood-based panel according to the preamble of claim 1, the use of such a wood-based panel according to claim 13 and a method for joining such panels of wood according to claim 14.

description

Tongue and groove panels have been known for a long time and are used to cover walls and ceilings or as floor panels. In particular, tongue and groove panels on the basis of wood materials represent a frequently used material variant in interior design.

While it used to be almost exclusively chipboard for the production of tongue and groove plates, coarse particle board, also known as Oriented Strand Board (OSB) plates are increasingly used today. OSB boards are wood-based panels made of long strands. These OSB boards have weight advantages (they are lighter) than the chipboards originally used and furthermore have improved technological properties (such as improved flexural strength) for the same thickness.

The wood-based panels used in various areas of interior work, such as OSB panels, must be fixed together during installation. A fixation is effected, for example, by the formation of a groove provided along a longitudinal and / or transverse edge and a spring formed on the opposite longitudinal and / or transverse edge, wherein the spring engages in the groove.

In addition, it is necessary to avoid divergence of so interconnected plates and an associated gap formation at the junction, the individual wood-based panels either additionally glued to each other or to fix by screws on beams or wooden frame structures. This is especially necessary in vertical applications or in floating laying of floor panels.

When processing or laying wood-based panels, if additional glue or glue is used, it must be inserted into the groove, for example with the help of a Application nozzle, to be introduced. For this purpose, the glue manufacturers and / or tongue and groove plate manufacturers indicate the amount of glue to be used per linear meter for a good quality bond. However, the amount of glue or adhesive to be applied can not be controlled by the processor, such as a handyman, or only with problems, so that often the entire slot volume is filled with glue. Accordingly, the glue swells out of the groove during the assembly of tongue and groove and must be removed later. Glue coming out of the surface must be carefully removed immediately, as the glue can no longer be completely removed after the glue has hardened. In addition, this approach unnecessarily wastes glue, resulting in higher costs and negatively impacting material efficiency. If, however, an underdosing of the required amount of glue in the tongue and groove connection, this compound can break under a mechanical stress.

To address this problem, various approaches have been followed in the past. So will in the DE 19821938 A1 proposed to insert a tube filled with glue in the groove, which is to be destroyed when joining the plates by the applied pressure of the spring. This method has some disadvantages. Tongue and groove plates are usually produced in a format of approx. 1,700 x 600 mm. This means that on the longitudinal side of the first plate with the groove through the second plate with the spring of the glue hose over the entire plate length must be crushed with uniform pressure. However, since the glue hose behaves like a pressure pad, uniform pressure is difficult to realize. Because if you attach and insert the second plate at the end or at the beginning of the first plate, the glue in the glue tube is pushed out of the groove of the first material plate as a result of this movement. In addition, it must also be taken into account that glue hoses of the required length must satisfy requirements in terms of their mechanical strength, which in turn can be counterproductive when assembling the boards and destroying the glue hose. Another problem arises when cutting the tongue and groove plates, as a partial or complete leakage of the entire glue hose may occur. This leads to a considerable contamination of the substrate and to a qualitatively not perfect bonding.

In the DE 10131248 A1 a system of tongue and groove plates is also described, wherein also here a glue hose is positioned in the groove. This is to be destroyed by a sharp-edged spring or a tip on the spring during insertion of the spring into the groove. The disadvantage of this system on the one hand that in a sharp-edged spring or a spring with a tip in the laying of the wood-based panels a risk of injury of Processor consists. On the other hand, it is also provided that the glue hoses can be mounted directly on the spring, which always involves the risk of damage to the glue hose during manufacture, storage and processing.

Next is in the DE 69720289 describes a complicated groove and spring system for wood-based panels, in which also glue hoses are used. However, these glue cords or glue tubes are not in the groove, but partially open on the profile of the tongue and groove system. Accordingly, there is a risk of damage to the cords during transport and processing.

In the EP 1229181 In turn, a system is described in which adhesive-filled capsules are embedded in a matrix, wherein this matrix is arranged at least in sections on a joining surface (ie in sections on the spring and / or the groove). The adhesive contained in the capsules is at least partially released during assembly of the wood-based panels and the force of pressure and friction and the resulting opening of the capsules. In addition, the capsules under the influence of external energy, in particular high-frequency energy, ultrasonic energy, thermal energy, light energy or UV energy, at least partially release the adhesive. Such a system thus places relatively high demands on the processor with regard to the equipment. This is usually not possible in the normal processing, eg on a construction site. Other generic wood-based panels are made US 2010/0236171 A1 and WO 03/093686 A1 known.

Accordingly, there are disadvantages, since none of the systems described allows a simple and cost-effective safe installation of wood-based panels. Thus, the application of glue requires time, a manual job is typically uneven and the technical systems are difficult to handle.

The present invention is therefore based on the technical object to overcome the disadvantages of the known system, and to provide a simple but efficient method that allows the processor easy processing and installation of the wood-based panels without additional costs. It should be dispensed solvent-based adhesive systems or harmful substances and also the production of the system, the transport, storage and handling should not create any additional technical problems.

The stated object is achieved by a wood-based panel with the features of claim 1.

Accordingly, a wood-based panel with two longitudinal edges and two transverse edges is provided, wherein at least one of the longitudinal and / or transverse edges at least one groove is formed, and at least one of the opposite longitudinal and / or transverse edges at least one spring is formed. In this case, at least two such wood-based panels can be joined together by inserting the at least one spring of a wood-based panel in at least one corresponding groove of the second wood-based panel.

According to the invention, the surface of the at least one groove of the present wood-based panel along at least one longitudinal edge on alternate symmetrical elevations. In addition, at least one container which contains at least one adhesive is introduced into the at least one groove. This adhesive container is opened by means of the symmetrical elevations when inserting the spring (the one wood-based panel) in the groove (the other wood-based panel), i. due to the pressure applied or exerted in the groove when inserting the spring in combination with the symmetrical elevations in the groove, the adhesive container is defined to burst.

Accordingly, a wood-based panel is provided which can be connected to a second wood-based panel by inserting at least one spring of a first panel of wood material into at least one corresponding slot of a second further panel of wood-based panel. That is, several wood-based panels are by joining the spring of a wood-based panel in a corresponding groove of another wood-based panel connected together to form a sheet, such as in the connection of individual floor panels to floor laminate floors.

The invention according to the invention in the groove along at least one longitudinal edge alternating symmetrical elevations cause upon insertion of the spring into the groove due to the applied forces or the applied pressure opening or destruction of the adhesive container provided in the groove. The adhesive is released and spreads in the region of the groove. Correspondingly, a quantity of linen predetermined in the production of the plate is released, so that a glue outlet at the connection point of tongue and groove is excluded. Also excluded is that too little glue is used and the compound is not durable. Since the person laying the material plates only the person Wood board has to fit into each other, the present wood-based panels for the processor are very easy to handle.

In one embodiment of the present wood-based panel, the groove has a depth between 5 and 15 mm, preferably 10 to 12 mm and a thickness (or width) between 5 and 15 mm, preferably 10 mm. The thickness (or thickness) of the groove cheeks is 3 to 10 mm, preferably 5 to 7 mm, particularly preferably 6 mm. The spring may have a length between 5 and 15 mm, preferably 5 to 9 mm and a thickness between 5 and 15 mm, preferably between 7 and 8 mm.

In one embodiment, an arrangement of the alternating symmetrical elevations in addition to the inventive arrangement n of the groove on or on the spring is possible, although the sole arrangement in the groove is preferred. The alternating symmetrical elevations in the groove are provided in particular along at least one longitudinal edge.

The symmetrical elevations in the groove and / or on the spring are repeated according to an embodiment at a regular distance, that is, these are continuous regularly repeating elevations or elevations.

The elevations provided in the groove can also be considered as regularly provided elevations at which the adhesive container provided in the groove is destroyed by the pressure of the spring.

In a preferred embodiment, the elevations or elevations in the groove and optionally on the spring each have a point-like tapered geometry pointing away from the wood-based panel. The sides of each survey are preferably the same length. The height and angular dimensions between the sides of the preferably pointed to running surveys can be varied depending on the plate thickness and groove geometry or spring geometry. Thus, the angular dimensions of the inner angle of the pointed-to-current survey vary, with a small inner angle means a more pointed survey. The angular size should be dependent on the material used for the adhesive container and the force or pressure to be applied to the opening of the adhesive container when inserting the spring into the groove. For example, if a firmer material for the adhesive container is used, the survey should be relatively acute-angled to open the adhesive container enable. In the reverse case, when using a softer material for the adhesive container, a less pointed elevation may be sufficient to open the adhesive container. The elevations may have a height of 1 to 5 mm, preferably 2 to 4 mm.

In a further embodiment of the present wood-based panel is provided that the elevations are formed in the groove and optionally on the spring by means of milling. Accordingly, the elevations during milling of the groove and optionally the spring can be milled, preferably by using a further milling cutter, that is, in this case, the elevations are formed integrally with the wood material board.

In a further variant of the present wood-based panel, it is also possible to use the elevations separately in the groove and optionally put on the spring. In this case, the surveys would consist of plastic, wood and / or wood materials that may be the same or different from the material of the wood-based panel. In such a case, for example, the bumps may be provided on a separate band that is correspondingly inserted in the groove along the same or mounted on the spring along the same. That is, surveys can be used or glued in accordance with this variant in the passage in the groove. The use of plastic as a material for the separately formed surveys allows the generation of particularly effective geometries.

In a further variant of the present wood-based panel are on the outside of the spring (that is on the spring side, which has no elevations) additionally receptacles or recesses provided which can absorb the outflowing glue / adhesive and an additional toothing or compound after curing of the glue / Adhesive is effected in the junction of tongue and groove.

In a further variant of the present wood-based panel, the at least one adhesive container runs along the entire length of the groove, that is along the total length of at least one longitudinal and / or transverse edge of the wood-based panel.

It is particularly preferred if the at least one adhesive container is designed in the form of a hose. In such a case, it is a continuous tube, for example in the form of an extruded tube containing the adhesive.

In a particularly preferred embodiment of the present wood-based panel, the at least one adhesive container is formed in the form of a tube, which is divided along its length into individual segments or chambers. The segments or chambers are preferably of the same size, that is, have equal volumes for receiving an equal amount of adhesive. The segments or chambers may be formed by welds or so-called sealing sites, e.g. be formed with a width between 1 and 3 mm, preferably 2 mm. It is also possible to divide the tube into segments using perforation lines.

In one embodiment, the adhesive container, in particular in the form of a tube, has a diameter between 3 and 10 mm, preferably 5 and 9 mm. The length of a single segment of the adhesive container, preferably in the form of a tube, can be between 100 and 200 mm, preferably between 130 and 180 mm, particularly preferably between 150 and 170 mm.

The use of an adhesive container in the form of a tube by sealing sites of separate segments has several advantages. Thus, in case of damage to the adhesive container (here glue tube) during transport, storage or processing in a segmentation only the adhesive or glue from the damaged segment and accordingly emptying of the entire adhesive container or glue hose is prevented. Furthermore, a segmentation of the adhesive container also allows the processing of different formats of wood-based panels, as these must correspond in format only a multiple of the single segment length of the glue hose segments (a separation of the glue tube in the seal is easily possible).

In a further embodiment of the present wood-based panel, the adhesive container used is made of a plastic material. The plastic material should be selected so that it has a certain strength, so that a tearing of the plastic container is avoided during the manufacture and transport of the wood-based panel, however, when pressing the spring into the groove, for example by tearing the material through the pointed Surveys can be opened. Particularly preferred plastic material used here is polyethylene terephthalate (PET), polyamide (PA) and / or polyethylene (PE) or a mixture thereof. However, it is also possible to use any other films or composite films for producing the adhesive container. In the case of using a polyamide film as Tubing has this thickness or thickness between 50 and 100 .mu.m, preferably between 70 and 80 .mu.m.

The presently used adhesive is selected from the group comprising polyvinyls and acrylates. Particularly advantageous is the use of aqueous adhesive formulations such as polyvinyl acetate (PVAc) or ethylene vinyl acetate (EVA). Of course, other glues can be used with water as a solvent. In one embodiment, a PVAc glue having a solids content of between 50 and 80% by weight, preferably between 60 and 79% by weight, particularly preferably of 65% by weight, may be used as the adhesive.

The wood-based panel is preferably a medium density fiber (MDF), high density fiber (HDF) or coarse span (USB) panel, a plywood panel, a cement fiber panel, a gypsum fiberboard, a wood plastic panel and / or a plastic panel. In particular, the wood-based panel represents an OSB board, which are preferably used for stiffening due to the special mechanical properties.

The present wood-based panel is used in particular for the production of laminate flooring, wall and / or ceiling paneling.

The present wood-based panel is also used in a method of joining two or more wood-based panels having the following features. In this method, a first wood-based panel having the above features is bonded to another (second) wood-based panel having the above features, wherein the spring of one panel of wood material is inserted into the groove of the other panel board containing the adhesive box. By introducing the spring of a (first) wood-based panel in the groove of the other wood-based panel, the adhesive container that is in the groove of this wood-based panel, opened due to the arranged in the groove of a wood-based panel and optionally on the spring of the other wood-based panel symmetrical elevations and the adhesive is released from the adhesive container into the groove.

Accordingly, the adhesive ratio is destroyed when meshing the tongue and groove elements and thereby releases the adhesive.

According to the present method, the adhesive container consists in particular of a hose containing the at least one adhesive, which is divided into individual segments. The use of a segmented adhesive contained hose allows easy laying and inserting the spring in the wood-based panels. Thus, depending on the progress of the insertion step of the spring into the groove, the individual segments of the tube containing the adhesive are opened in succession or burst in succession, so that no leakage of the entire glue tube must be feared. Also located in particular in the arrangement of the elevations in the groove on the groove bottom, an area in which the exiting adhesive or glue can run, without the adhesive can be pressed completely by the pressure of the spring in the direction of assembly. Accordingly, an overflow of the adhesive from the joint is thereby avoided, since excess adhesive can be absorbed by the bottom of the groove.

Accordingly, the processor or publisher need not make any specific information about the amount of adhesive to be used in the processing of the present tongue and groove plates. Also eliminates the need for the publisher to select the suitable adhesive for the present wood material board, since the plate manufacturer has already selected the appropriate adhesives by preliminary tests. In addition, the exact adaptation of the tube content to the groove / spring geometry ensures optimal gluing, which is further supported by an optimized spacing of the elevations. Even when cutting the material plates can maximally idle a single segment of the segmented adhesive contained hose, which is not a problem for the contamination of the substrate and the quality of the bond.

Overall, the provision of the present wood-based panel and the method for bonding such wood panels results in a number of advantages: time savings in processing, a higher quality bonding, a material savings in the adhesive or glue used, better and easier processability, especially for a private home improvement and a simpler format change in the production of the material plates.

Figur 1

eine schematische Draufsicht auf eine Holzwerkstoffplatte gemäß einer Ausführungsform der vorliegenden Erfindung;

Figur 2

einen vergrößerten Ausschnitt aus der in Figur 1 gezeigten Ansicht einer Holzwerkstattplatte, und

Figur 3

eine Querschnittsansicht von zwei identisch ausgebildeten Holzwerkstoffplatten nach Figur 1 an deren Verbindungsstelle.

The invention will be explained in more detail with reference to the figures of the drawings of an embodiment. Show it:

FIG. 1

a schematic plan view of a wood-based panel according to an embodiment of the present invention;

FIG. 2

an enlarged section of the in FIG. 1 shown view of a wood workshop panel, and

FIG. 3

a cross-sectional view of two identically formed wood-based panels after FIG. 1 at the junction.

FIG. 1 shows a plan view of a wood-based panel 1 a, b of a wood material, such as MDF, HDF, preferably OSB.

In the present embodiment of the FIG. 1 In each case a groove 2 is milled in the longitudinal edges and transverse edges. At the respective opposite longitudinal edge and transverse edge a spring 3 is formed in the form of a rectangular projection. The dimensions or shapes of the groove 2 and the spring 3 are each designed so that the spring 3 of a first wood-based panel can engage in the groove 2 of a second wood-based panel.

In the present embodiment, the groove bottom is provided with pointed symmetrical elevations 4, which repeat continuously along the groove (see FIG. 2 ).

On the groove base with the pointed elevations 4, a glue tube or glue thread 5 is arranged, which is divided into several segments. This glue thread or glue hose 5 escapes along the entire length of the groove 2. The amount of glue present in the segments of the glue hose 5 is matched to the size of the volume in the joint when the spring of a wood-based panel 1 b in the groove of the other wood-based panel 1 a engages (see also FIG. 3 ).

Upon insertion of the spring 3 of a wood-based panel 1 b in the groove 3 of the other wood-based panel 1 a of the glue hose is due to the force acting in conjunction with the pointed elevations 4, which are arranged on the groove bottom of a wood-based panel 1 a, destroyed and the Adhesive is released into the corresponding volume space between spring and groove bottom. The segments of the adhesive tube burst one after the other with progressive insertion.

The thereby released adhesive pours into the groove bottom, on which there is an area in which this can run, without the adhesive can be completely pushed out of the groove by the pressure of the spring.

embodiment

A 22 mm OSB board (format: 1690 x 634 x 22 mm) is profiled in a tongue and groove system. The groove cheeks have a thickness of 6 mm and the groove has a thickness of 10 mm and a depth of 12 mm. In the groove base a wave-shaped milling is attached, which has a height of 2 mm. A glue hose with a diameter of 9 mm, consisting of divided individual segments with a length of approx. 169 mm, is inserted in the groove. The polyamide film used for the glue hose has a thickness of 70-80 μm. The glue hose is filled with a PVAc glue with a solids content of 65% by weight. Between the segments there is a seal with a width of about 2 mm. The spring of the N + F plate has a length of 9 mm and a thickness of 8 mm. It is rounded in the front area.

Claims (15)

1. Composite wood board (1a, 1b)

   having two longitudinal edges and two transverse edges,

   having at least one groove (2) formed in at least one of the longitudinal and/or transverse edges, and

   at least one tongue (3) formed on at least one of the opposite longitudinal and/or transverse edges,

   wherein at least two composite wood boards (la, 1b) can be joined to each other by inserting the at least one tongue (3) of one composite wood board (1b) into at least one corresponding groove (2) of a second composite wood board (la),

   and at least one container (5) containing at least one adhesive is introduced into the at least one groove (2),

   characterized in that

   the surface of the at least one groove (2) has alternating symmetrical elevations (4) along at least one longitudinal edge,

   wherein the container (5) is opened by means of the symmetrical elevations (4) as the tongue (3) is inserted into the groove (2).
2. Composite wood board according to Claim 1, characterized in that the symmetrical elevations (4) are additionally provided on the tongue.
3. Composite wood board according to Claim 1 or 2, characterized in that the symmetrical elevations (4) in the groove (2) and optionally on the tongue (3) repeat at a regular spacing.
4. Composite wood board according to one of the preceding claims, characterized in that the elevations (4) have a geometry pointing away from the composite wood board (la, 1b) and tapering in the shape of a point.
5. Composite wood board according to one of the preceding claims, characterized in that the elevations (4) in the groove (2) and optionally on the tongue (3) are formed by means of milling.
6. Composite wood board according to one of Claims 1 to 5, characterized in that the elevations (4) are inserted separately into the groove (2) and optionally placed on the tongue (3).
7. Composite wood board according to one of the preceding claims, characterized in that the at least one adhesive container (5) is arranged along the whole length of the groove (2).
8. Composite wood board according to one of the preceding claims, characterized in that the at least one adhesive container (5) is formed in the shape of a hose.
9. Composite wood board according to one of the preceding claims, characterized in that the at least one adhesive container (5) is formed in the shape of a hose which is subdivided into individual segments along its length.
10. Composite wood board according to one of the preceding claims, characterized in that the adhesive container (5) consists of a plastic material.
11. Composite wood board according to one of the preceding claims, characterized in that the adhesive is chosen from the group containing polyvinyls and acrylates.
12. Composite wood board according to one of the preceding claims, characterized in that the composite wood board is a medium density fibre (MDF), high density fibre (HDF) or coarse chip (OSB) board, plywoodboard, a cement fibreboard, a gypsum fibreboard, a wood/plastic board and/or a plastic board.
13. Use of a composite wood board according to one of the preceding claims during the production of laminate floors, walls and/or ceiling linings.
14. Method for joining a composite wood board according to one of Claims 1 to 12 to a further composite wood board according to one of Claims 1 to 12, characterized in that the tongue (3) of the one composite wood board (1b) is inserted into the groove (2) of the other composite wood board (la), said groove containing the adhesive container (5), wherein, as a result of the insertion of the tongue (3) of the one composite wood board (1b) into the groove (2) of the other composite wood board (1a), the adhesive container in the groove (2) of this composite wood board (1a) is opened on account of the symmetrical elevations (4) arranged in the groove (2) of the one composite wood board (1a), and the adhesive is liberated from the adhesive container (5).
15. Method according to Claim 14, characterized in that the adhesive container (5) consists of a hose which contains the at least one adhesive and which is subdivided into individual segments.

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