ES2616902T3 - Procedure and device for the manufacture of a board-shaped material containing lignocellulose - Google Patents

Abstract

Procedure for manufacturing a board-shaped material containing lignocellulose (1), in which the following steps are carried out: - producing a pressed board-shaped body (2) with a main surface on the upper side (2.1) , a main surface on the lower side (2.2) and at least one narrow lateral surface (2.3) by compression of lignocellulose containing material provided with binders (3) at elevated pressure and elevated temperature, - facilitating a strip of material in a thickness (d) of a maximum of 3 mm as a edge strip (4) containing one or more layers (4.1) of paper impregnated with resin, ABS, PP, PVC and / or melamine, the roughness of the edge strip being (4 ) at least on a side smaller than that of the narrow surface (2.3) on which the edge strip (4) is applied, - apply the edge strip (4), which can be printed with a resolution of at least 60 dpi , on at least a part of the at least one narrow surface (2.3) e-impri I saw in the edge strip (4) an optical code (5) after application on the at least one narrow surface (2, 3), the code (5) being printed on the edge strip (4) in a resolution of at minus 60 dpi and corresponding to data deposited in a data processing system (7) that refer to the board-shaped material containing lignocellulose (1).

Description

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description

Procedure and device for the manufacture of a board-shaped material containing lignocellulose

The present invention relates to a process for the manufacture of a board-shaped material containing lignocellulose, for example a board of wood-derived material, in which a pressed board-shaped body with a main surface is produced in the upper side, a main surface on the lower side and at least one narrow lateral surface by compression of material containing lignocellulose provided with binders at elevated pressure and elevated temperature.

In addition, the invention relates to a device for the manufacture of a board-shaped material containing lignocellulose, for example a board of material derived from wood, with a pressure device, which is configured to compress material from small pieces, in Particular of particles glued with a binder such as wood chips, threads and / or fibers, at elevated pressure and elevated temperature and to produce a chipboard with a main surface on the upper side, a main surface on the lower side and at least a narrow lateral surface.

In addition, the invention relates to a board-shaped material, which contains lignocellulose, for example a board of wood-derived material, which is manufactured by a corresponding procedure.

Finally, the invention relates to a use of a board-shaped material containing lignocellulose, for example a board of material derived from wood, which has a pressed board-shaped body with a main surface on the upper side, a surface main on the lower side and at least one narrow side surface.

A board-shaped material, which contains lignocellulose, means a construction element that mainly contains particles of wood and / or lignified plant material (eg straw). The wood particles can be among others, wood chips, wood threads (long rolled chips), wood fibers and wood flour. By adding a binder, by means of compression of materials containing lignocellulose, in particular of the wood particles, board materials (construction elements in the form of a board) are manufactured.

During or after production, the construction elements in the form of a board, for example boards of a material derived from wood, come with a marking, which has an identifying character. The marking will give information on what properties the building element has in the form of a board, what nature it presents, where, when and who has manufactured it and for what intended use it is intended.

Different procedures are known for the state of the art to provide a panel-shaped construction element with a marking.

For example, it is possible to apply an adhesive label on a part of the construction element in the form of a board.

An adhesive label consists of a top paper material and an adhesive layer applied on the bottom side. The adhesive label can be printed with the desired data. To apply the adhesive label, all surfaces, that is to say the front side (main surface on the upper side), rear side (main surface on the lower side) and the lateral edge (narrow surface), of a construction element are considered fundamentally in the form of a board. However, different disadvantages are inherent to this type of marking. The facilitation of an adhesive label as additional data support is very expensive. In addition, the application of adhesive labels on the corresponding section of the construction element is linked to a high cost of time. It is possible that the adhesive labels, for example, will peel off again in the case of an insufficient adhesive effect or by external influence, whereby the marking would be lost. If the adhesive labels are applied on the front or back side of a building element in the form of a board, they must be removed if necessary before using the construction element in the form of a board to avoid a reduction in aesthetics. from the front or rear side. This, for example, in the case of laminate coated panels is disadvantageous since a certain, impeccable, preferably aesthetic ornament is usually seen on its front side.

In addition, the stacking capacity of building elements in the form of a board, which have an adhesive label on the front or rear side, is limited. On the one hand, by means of the adhesive label, an elevated area is formed which, in the case of several construction elements in the form of a board arranged in a flat support with respect to each other through the diminished support surface in this way, can lead to stack instabilities. On the other hand, the dead zone creates a dead volume that increases the demand for pile space beyond the sum of the thicknesses of the construction elements in the form of a board. On the contrary, the application of an adhesive label on a narrow surface of a building element in the form of a board is not convenient, since only a small edge is available

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application surface. In addition, the application of an adhesive label on a lateral edge, if necessary, is further complicated when the lateral edge has a profile.

It is also known to print on the front or back side of a building element in the form of a board a marking. However, an impression must also be removed again before the use of the construction element in the form of a board to avoid a decrease in aesthetics. In addition to an ink impression, it must first be dried, for example, before stacking of the printed board construction elements is carried out, since, if not, there is a danger that the ink will run and therefore the marking does not it can be distinguished and / or adjacent sections of the front or rear side become dirty.

Procedures, with which durable markings can be provided, that is to say that they cannot be removed, on the front or rear side, for example by drying by means of a laser, are not preferred since they require a lot of time and are only suitable when the aesthetic design The front or rear side is not relevant for the use of the building element in the form of a board.

An additional possibility of marking the construction element in the form of a board consists in applying the desired data in graphic characters (letters, figures, etc.), that is to say in uncoded text, in a lateral edge of a construction element in the form of board. The direction of reading the uncoded text runs in this case along the extension direction of the side edge, on which the uncoded text is applied. This procedure, however, is only feasible, when the construction element in the form of a board has a sufficient thickness for the application of text without coding in readable size. This means on the one hand that the height of the graphic characters must be less than the thickness of the building element in the form of a board, and on the other hand that the graphic characters must be arranged centered transversely to the direction of extension of the lateral edge to avoid Calligraphy damage.

In particular when construction elements in the form of a wooden board or a material derived from wood have a smaller thickness, it is barely possible, due to the surface nature (surface roughness, also called roughness) to apply a succession of fine graphic characters of readable way on the side edge.

From DE 10 2007 058 029 A1 it is known the arrangement of several building elements in the form of a board that are less than 5 mm thick, flat to form a stack in which the main surfaces of adjacent building elements are they touch each other and the narrow lateral surfaces of the construction elements together form a lateral surface of the stack. This side surface of the stack is provided in conjunction with a marking, for example printed. Each of the narrow side surfaces will in this case obtain a part of the marking. Individual narrow surfaces are so thin that they cannot be printed individually. Therefore it is also not possible to provide, that is, to identify the construction elements in the form of a board with individual markings, which only affect one board. The markings form a bar code, which runs along all narrow surfaces, which form a narrow side of the stack.

However, said bar code has the disadvantage that it is relatively large compared to the amount of data encoded therewith. An additional problem is that due to the unavoidable absorbent power of the wood particles on the narrow side surfaces, it is no longer possible to distinguish, at least not completely, an applied marking, printed on the narrow side of the stack on some of the narrow surfaces. In addition, it can be achieved that marks can be unsatisfactoryly distinguished, when these are applied too thin due to the surface structure (topography) below. Also parts of the marking may disappear completely over time, for example when wood material breaks at the edges in case of loading. In addition, all the battery panels have the same marking, so that no individual marking is possible. Finally, marking is only possible when a stack is formed of several boards.

From DE 10 2010 053 081 A1 it is also known to provide a building element in the form of a board with an RFID transponder in which data is stored (which identifies the particular construction element) that refer to the construction element in question. The use of said RFID transponder is complicated and very expensive. Otherwise this is not suitable for any type of board, each board thickness and each purpose of using the board.

It is an objective of the present invention to manufacture a board-shaped material containing lignocellulose, which in a simple manner allows the integration of data referring to the board-shaped material, which contains lignocellulose with the respective board-shaped material, containing lignocellulose.

The objective previously deduced and set forth is achieved according to a first teaching of the present invention by a process for the manufacture of a board-shaped material containing lignocellulose, according to revindication 1.

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When the present description refers to an elevated temperature and an elevated pressure, it is meant that the pressure (compression force, clamping pressure) is higher than the ambient pressure or the temperature is higher than the ambient temperature.

In other words, the edge strip is configured so that it can be printed with a resolution of at least 60 dpi (dots per inch, dots per inch), preferably at least l2o dpi, especially preferably at least 180 dpi, is say the optical code in this resolution is printed or reproduced on the edge of the song. The roughness (according to Bendtsen, Parker Print Surf and / or Bekk) of the edge strip at least on one side, in particular on the printed side, in particular on both sides is less than that of the narrow surface on which it is applied The singing strip. When applied on the narrow lateral surface or on one of the narrow lateral surfaces, that is to say a surface that joins the main surfaces of the pressed body in the form of a board (the agglomerate board) a edge strip that can be printed with the resolution defined above and / or having a roughness on at least the printed side that is smaller than that of the narrow surface creates a surface with narrow sides that can be printed better than the narrow surface of the uneven and porous pressed body. So to speak, the roughness at least on one side of the edge strip is less than that of the narrow surface of the pressed body. This side is the side that is printed with the code and then departs from the pressed body. In this way it is no longer necessary to print the desired data that are referred to and in particular identify the board-shaped material, which contains lignocellulose, for example data on the properties, nature, the machining steps carried out and / or that remain by perform, machining place, treatment time, manager, intended use, identification required by law as CE mark or mark of the wood certification or der certification of the wood or origin of the wood (PEFC, FSC) etc., on labels adhesives and glue them on the respective construction element or the board-shaped material containing lignocellulose; if, according to the state of the art, an adhesive label is glued on one of the main surfaces, if so to speak this represents a decrease in the aesthetics of the main surface, the adhesive label is glued on a narrow surface, then no adhesion is given enough. According to the invention, on the contrary, a edge strip is glued with the narrow surface or the edge strip is configured so that it can permanently cover the narrow surface of the pressed body and thereby the roughness of the narrow surface. According to one configuration, it is conceivable that the adhesive, for example synthetic resin or a glue penetrates the pores (that is to say the intermediate spaces between the fibers and particles of material filling the material) of the pressed body and / or fills the unevenness in the surface of the pressed body and level them for it, whereby an optimal union is reached between the edge of the edge and the narrow surface of the pressed body. In particular, the edge strip can be pressed under high pressure (pressure of clamping) and high temperature on the narrow surface.

By means of the surface that can be printed in a higher resolution compared to original wood surface or with narrower narrow sides, which obtains the board-shaped material containing lignocellulose, by means of the edge strip, more data than code can also be applied essentially on the narrow surface than in the case that the narrow surface is not provided with a edge strip. In this way the code can be printed in a higher resolution and also much smaller than on the surface than is possible in the case of the state of the art. Also by means of the created possibility of being able to print in a particularly high resolution, types of modern codes can be used, for example matrix codes that allow a high information density. This in turn creates the possibility of applying even more data to machining stages, intended uses etc., also consecutively with each other. Finally, each board-shaped material containing lignocellulose with individual data can also be integrated or printed in an inventive manner, which greatly simplifies the manipulation of the board-shaped materials, which contain lignocellulose during and after fabrication with respect to manufacturing. state of the art According to a configuration of the method according to the invention, the edge strip is provided or manufactured in a thickness of a maximum of 2 mm, especially preferably a maximum of 1 mm. Said thickness is sufficient to fill and therefore level the inequalities that are conditioned by the roughness on the narrow side of the pressed body and create a smooth surface that can be printed optimally. It should be noted that the thickness of the edge strip after the application of the edge strip on the narrow surface of the pressed body, at least by sections is lower than before and therefore lower than the levels may be precedents, which is conditioned by the fact that the strip material is pressed into the pores or depressions that form the roughness or inequality.

The edge strip can be provided according to a further configuration of the process according to the invention also as rolled products, which in particular in the case of the previously described thickness values of the edge strip can be implemented in a simple manner. A rolled product, that is to say a rolled edge strip, can be transported particularly easily and fed to the narrow side surface of the pressed body (after unwinding).

In the process according to the invention as a edge strip, a strip of material containing one or more layers of resin impregnated paper can be provided. Particularly in the case of the one or several layers in the strip of material it is kraft paper, a kind of paper with the highest possible strength. Kraft paper is composed of almost 00% cellulose fibers, adding only fecula, alum and glue to achieve surface effects and increases in resistance. Especially suitable are coniferous wood with long fibers, for example spruce or pine (source:
http://de.wikipedia.org/wiki/kraftpapier). As material

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ABS (acrylonitrile-butadiene-styrene), PP (polypropylene), PVC (polyvinyl chloride) and / or melamine can also be used for the edge strip. It is also conceivable to facilitate or manufacture the edge strip of several of the materials described above. A edge strip of said material can be attached especially well, in particular at elevated pressure (tightening) and / or elevated temperature with the narrow surface of the pressed body and is also relatively insensitive against additional machining steps of the material in the form of boards that It contains lignocellulose, particularly in the area of edges. In other words, a material in the form of boards containing lignocellulose can also be fed without further machining edge, without the risk of the edge strip and therefore the support becoming useless for the code optical.

The edge strip may also be provided with selective laser additives (particles), in particular selective laser pigments. Selective laser means that the additive or pigments, when the laser beam (the laser light) affects them, transforms the laser light into heat, whereby the temperature of the additive or pigments rises suddenly. The consequence is that the color of the immediate environment of the particles of the additive or of the pigments varies constantly (source:

http://magazin.merck.de/de/life and quality / funktionellepigmente / lazerflairl.html). A corresponding additive of

Selective laser can be provided as a pigment or granulate or loaded into the material of the edge strip.

Fundamentally, it is also possible that the selective laser additive, as soon as the additive particles are detected by the laser light, even the color; in this case the material (the matrix), in which particles of the additive are embedded, cannot even be held by laser light. Such a configuration of the edge strip is particularly advantageous then when, according to a configuration of the method according to the invention, the optical code is printed by means of a laser printing procedure, as will be mentioned below. By selecting the particles, which form the selective laser additive, the inscription time (pressure time) and the color of the printed code can also be adjusted.

As already mentioned, the edge strip according to the invention has a roughness that is less than that of the narrow lateral surface of the pressed body. In this case, according to a further configuration of the procedure, it is expected that the roughness according to Bendtsen will amount to a maximum of 450 ml / min, preferably a maximum of 200 ml / min, especially preferably a maximum of 100 ml / min, and / or the roughness according to Parker Print Surf (PPS) at a maximum of 10 | jm, preferably at most 5 | jm, especially preferably at a maximum of 2 mm, and / or the roughness according to Bekk at least 10 s, preferably at least 50 s, of especially preferably at least 100 s.

Roughness (roughness) is a concept of surface physics that indicates uneven surface height (the depressions that form the inequality are filled and leveled by the material of the strip and edges, particularly when the edge strip is compresses at high pressure on the narrow surface). Different measurement procedures are known for the determination of roughness. The so-called roughness according to Bendtsen indicates the value for the circulation of air current that passes between a measuring ring of a measuring head and the sample surface and that originates in the case of an established overpressure. As a result, the volume of air that leaves per minute is obtained. The so-called roughness according to Parker Print Surf (PPS roughness) is also determined by an air current measurement procedure in which specifically between a ring-shaped measuring body and the sample that is located on a hard rubber plate is ascertained A stream of air. In the case of the measurement method according to Bekk the sample is pressed with a rubber punch on a glass ring and the elapsed time required by a defined volume of air to pass through the gap between the sample surface and the plate is measured. glass. The space below the glass ring is requested with a vacuum. The value found in this way is called roughness according to Bekk. All methods provide a measure for the smoothness or roughness of the surface of a machined part, for example of a singing strip (sources: M. Lechthaler, W. Bauer, "Rauigkeit und Topografie - Ein Vergleich unterschiedlicher Messverfahren",
http://de.wikipedia.org/wiki/rauheit).

With the previously defined values for the roughness of the surface of the edge strip, an especially good quality of the printing is achieved, that is to say of the printed optical code. This can be printed at a particularly high resolution, which makes it possible to perform a high data density per unit area.

According to another additional configuration of the method according to the invention, the edge strip is applied only on a part of the narrow side surface. Thus it is also conceivable that the edge strip does not cover the entire narrow lateral surface of the pressed body. It is also conceivable that the edge strip is provided only in one area, which at a subsequent machining stage does not undergo any machining or at least any machining that influences the edge strip and / or the optical code. Fundamentally, however, it would also be conceivable to arrange the edge strip just in an area that is machined at a final machining stage, in particular so that the edge strip or at least the optical code is removed or coated; In this case, the optical code in particular serves to visualize data that refers / or identifies the material in the form of a board containing lignocellulose until the machining stage and, by means of which the optical code is removed or coated. The optical code in the latter case would no longer be visible later, which may be desired among others, for optical reasons, for example when the board-shaped material containing lignocellulose must reach the customer

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end as part of a piece of furniture.

A edge strip, as can be provided according to the invention, can preferably be placed on both longitudinal edges of the pressed board-shaped body and printed with said optical code. By longitudinal edges in the case of a pressed body, whose main surfaces are rectangular, the two longest narrow surfaces are understood. If an optical code, in particular the same optical code, is found in both longitudinal edges of the pressed body, it is guaranteed that a stack of multi-panel boards (board-shaped materials) manufactured by the method according to the invention or a Single board (board-shaped material) manufactured by the method according to the invention can always be distinguished on the one hand by which the stack of boards or the board is housed or placed with a wheelbarrow. The optical code may be provided in a place of the edge strip or of the longitudinal edges that can be detected by the position of the driver of the truck by means of a manually operated reading device or by a reading device automatically fixed on the truck. In this way, merchandise flows can be detected very easily within a company.

According to a further configuration of the method according to the invention, the edge strip is applied with a length corresponding to a maximum of 150%, preferably a maximum of 125%, especially preferably a maximum of 110%, of the code length. optical. Additionally or alternatively it is also conceivable that the edge strip is applied with a width that corresponds to a maximum of 150%, preferably a maximum of 125%, especially preferably a maximum of 110%, of the width of the optical code. The length or width of the optical code is defined in this case as the distance between the places (points) furthest from each other in the respective dimension (length, width) that are still part of the code. In this way the surface for the application of the optical code can be reduced to a minirno. In this case it is preferable when there is still an edge between the external places (points) of the optical code and the edge of the edge strip, whereby a possible damage to the edge of the edge strip cannot lead to an illegibility of the code .

In particular, the optical code can be completed once or several times in each case after a period of time, in particular in each case after a machining stage of the pressed body, in an additional code section. Thus, it is conceivable that after the production of the pressed body, that is to say after compression, a first section of code is printed on the edge of the strip that contains data for the subsequent machining stages or intended use. After a machining stage, an additional code section can then be completed on the edge strip that contains data regarding the machining stage that has just been performed or a subsequent machining stage. Each section of code preferably already forms a complete optical code by itself according to the preceding and following description.

In the procedure according to the invention the optical code corresponds to data or data sets deposited in a data processing system that refer and in particular identify the board-shaped material containing lignocellulose. In other words, for each code and / or section of code a corresponding set of data is deposited or stored in a memory, in particular stationary (storage medium). This set of data or this data can / can also be completed with each section of code, that is, additional data is deposited in the memory.

However, it is also conceivable that a stored data set corresponding to an optical code or code section printed in time slots is also extended without complementation (printing) of an additional code section; Thus, for example, after a machining stage of the board-shaped material containing lignocellulose, instead of the application of an additional code section, only the data set in the memory can be expanded, for example in data that refers to or identifies the machining stage that has just been performed or a following of the board-shaped material containing lignocellulose.

It should be noted again that the data corresponding to the code does not necessarily have to be provided in a memory. Depending on the realization of the code or of the code sections in the edge of the board, the data can at least partially also be included directly in the code, which makes it possible for the post-processing device an automatic material identification. It is also conceivable to provide a specific customer code on the edge of the board that provides the customer with the necessary information in an encrypted form. That is, standardized data such as product data is provided in a code in a storage medium (stationary). The specific data of each client (such as the client's material number) for automatic identification before the subsequent processing process can be provided if the client so wishes, in an additional code.

According to a further configuration of the method according to the invention, the optical code is applied to the edge strip by means of a contactless printing procedure, in particular by means of an ink or laser printing procedure. In the case of a laser printing process, the material or a component of the material of the edge strip is taken, in particular the particles of a selective laser additive, by contact with the laser light or laser beam. In particular, a CO2 laser is used for the laser printing process and in particular for the ink printing procedure an inkjet printer (ink jet printer). During a printing operation, in particular ink printing operation, or afterwards it may be

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It is also planned to dry the area of the edge strip, which has just been printed to prevent the optical code from running or being disfigured. This can be done by a corresponding drying device. Fundamentally, it is also conceivable to apply the optical code by means of a printing element that touches the edge of the edge, in particular by means of a seal, for example a rolling tool.

According to a further configuration of the method according to the invention as an optical code, a code containing at least one two-dimensional (2D) and / or three-dimensional (3D) code, in particular at least one matrix code, preferably data matrix code, is printed. They can also code sections of the entire optical code can form different types of code (1D, 2D, 3D); a code section is for example a two-dimensional and another code section for example a three-dimensional code.

A 2D code can be a stacked bar code (a single bar code would be a 1D code), that is, a chain of additional bar codes that are arranged vertically one below the other. A check digit for the entire code provision guarantees the data security of the 2D code. In term 2D code can be derived through the representation of two-dimensional information. Therefore, the standardized bar code would be a 1D bar code, since the code information is represented only on the X axis. In the case of stacked code, a second background of information is also added in the form of the Y axis. type of compression, ie stacked the surface for a 2D code can be kept relatively small. The use of the reading technique compared to standardized bar codes is only linked to low supplementary costs, which in practice has proven to be positive as long as the standardized barcode code structures are maintained. In parallel to this, a series of codes have been developed that can no longer be called bar codes, but are called matrix codes. Especially for the tasks of classifying omnidirectional packages, the max code was initially developed to be able to classify quickly and safely ("omnidirectional code": code that can be detected from all directions). An autoconnection error correction algorithm guarantees data security. As a basis for the reading side, however, rapid image processing systems in the form of linear cameras or matrix cameras are necessary. Another path is taken with the matrix data code, which in the present invention is preferred. This code mainly reflects within the area of the demand for small space. The code allows omnidirectional readability in analogy with the maxi-code. The matrix data code is very compact, secure and allows a large number of signs and typographic compositions in the encryption. A two-dimensional code is called the QR code. In the case of a 3D code, it is finally a code that, for example, also includes different colors; for example a 2D matrix code with different colors is a 3D code. The more flat (dimensions) the code has, the more data can be integrated with it and the smaller the code with the same information content can be.

The codes described above can be read easily with cameras suitable for industrial use and reading devices in the production process, which also gives the device for the subsequent treatment of the material manufactured in the form of a board, which contains lignocelluloses the possibility of identify the raw material used, that is, the board-shaped material containing lignocellulose manufactured by the method according to the invention, or the pressed body based thereon, automatically at the beginning of the production process of the post-treatment device.

According to a further configuration of the method according to the invention the optical code, that is also the respective code section in the case where several sections of code are provided, is detected by a reading device, for example by a reading device integrated in a smart phone or other device with internet connection and transferred to the data processing system. In this case, it is conceivable that, after and / or before each machining stage of the board-shaped material containing lignocellulose, a reading device that registers the previously printed code is installed and transferred to the data processing system that then again by means of the data deposited in the memory (ie stored) corresponding to the code, carry out a check of the device or of the machining stations of the device to perform the respective additional machining stages. The reading device can transfer the corresponding data set to the optical code or the stored data corresponding to a visualization device, which can also be integrated in a smart phone or other device with internet connection, which in turn visualizes or reproduces the data received for example as uncoded text, graphic (image) or video. The reading device or other reading device that has detected the optical code can also transfer the recorded data to a device to check the print quality that may be part of the data processing system, the device being configured so as to compare the data received by the reader on the nature of printing with theoretical values stored for print quality and / or with a set of data stored for an optical code and in the case of a deviation from the theoretical values for print quality or upon verifying a mismatch (deviation) with the stored data set for the optical code, it causes a display apparatus, in particular the previously defined display apparatus, to display information on insufficient print quality. In other words, a reading device can be used to inform service personnel about deviations of optimum print quality.

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According to a further configuration of the process according to the invention as a pressed body by compression, a board-shaped body with a thickness (distance between upper and lower main surface) of at least 5 mm, preferably at least 8 mm, is produced. especially preferably at least 10 mm. It has been shown that an agglomerate board with said thickness on one side can be printed especially on the sides, since the narrow surface and with it the subsequent printing surface formed by the edge strip is especially flat. On the other hand, an agglomerate board of said thickness can be provided with an optical code with relatively large dimensions and correspondingly, many data. Finally, an agglomerate board with said thickness can also be provided in a particularly suitable and durable manner with the aforementioned edge strip.

According to a further configuration of the process according to the invention in compression as lignocellulose containing material, wood chips, wood strands and / or wood fibers that are provided with a binder are mainly or exclusively used. In particular, therefore, the compression or production stage of the pressed body is carried out in such a way that the percentage of the lignocellulose containing material has the previously defined values. The percentage of lignocellulose-containing materials in the pressed body in particular amounts to at least 50% by volume, preferably at least 75% by volume, especially preferably at least 90% by volume.

According to a further configuration of the method according to the invention, it is foreseen that the application of the edge strip on the pressed body is carried out before or after a coating on at least one of the main surfaces of the pressed body. In other words, the pressed body may also be provided or provided with a lining, which, however, has no influence on the placement of a edge strip to house an optical code.

Finally again according to an additional configuration of the method according to the invention it is provided that after the application of the edge strip on the pressed body a part of the pressed body provided with the edge strip is separated at a point of separation, so which the pressed body in a separation place obtains a new narrow surface, the new narrow surface of the pressed body in particular being coated. In other words, the edge strip by means of the separation operation is removed at least partially, preferably completely, and the narrow surface (cutting surface) originated again in the pressed body in the form of a board is then provided with a coating, for example with a lacquer or a plastic such as ABS, PP, PVC or melamine. In this way, in particular, it is conceivable that the edge strip or the printed optical code be used for a pressed body in the form of a board with a "raw format", that is to say for the board before, for example, it separates to form parts of individual furniture, panels or in general individual machined parts (which then form the respective board-shaped material, which contains lignocellulose). In this case, it may be provided that the edge strip or the impression after the division of the pressed body in the form of a board with a raw format as a cutout is suppressed.

Crude format means the chipboard board as it comes from the pressing device, if necessary after edge machining or edging with saw (which however does not modify the format resengably) or after a separation cut, to create a crude format that can be handled well (also called "semiformat"). To said special raw format, that is to say said semiformat, the agglomerate boards are usually carried after the coating. Here is an example of a format: board after exiting the pressing device 5.60 x 2.07 m -> coating -> separation cut -> 2.80 x 2.07 m (coated semiformat).

Preferably, each agglomerate board after the pressing device is provided with two of the optical codes described, each part having a code in the semiformats. Alternatively, also only after coating and division, each semiformat can be supplied separately with a edge strip and optical code. Or a song strip is applied in the center, it is provided twice with an optical code and then separated in the area of the song strip between the two printed codes.

The objective is also achieved according to a second teaching of the present invention by means of a device according to revindication 13.

As a pressing device, for example, a press is used which operates continuously or in cycles in which one or several loose layers (ie not yet compressed) of lignocellulose material, in particular wood material, are introduced, the material being provided lignocellulose with a binder. By compression under high temperature and high pressure, the pressed body already described in the form of a board is therefore caused.

The edging device can be provided with a feed of rolled products (so to speak the edge strip can be provided as rolled products) be provided and / or with one or several clamping cylinders for tightening the edge strip with the surface narrow side of the pressed body. A heating device that heats the edge strip and / or activates or liquefies an adhesive applied thereon may also be provided.

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The printing device is connected in particular with the aforementioned data processing system or a separate one that transfers the printed optical code to the printing device. The printing device can in this case have several printheads that can be arranged in different places of the device for the manufacture of the board-shaped material containing lignocellulose. In this way, before or after certain machining stages, an optical code or corresponding code section can be printed on the edge strip. The printing device is connected in particular downstream of the edging device. Additionally, the device according to the invention can present a reading device, which is configured to detect the optical code and transfer the optical code to the data processing system, and / or a display device, which is configured to display received data that is refer or identify the board-shaped material containing lignocellulose

Therefore, the device may also have a drying device that is configured so that the ink or color previously printed on the edge strip is dried.

Finally, the objective according to a third teaching of the present invention is achieved by using a board-shaped material containing lignocellulose according to claim 15.

The data that refer to the board-shaped material and identify it in particular means other individual data or several data that are selected from a group comprising data on the properties of the pressed body and / or board-shaped material, data on the nature of the pressed body in the form of a board and / or material, data on the machining stages carried out and / or what remains to be done of the pressed body in the form of a board and / or material, data on the place of machining of the body pressed in the form of a board and / or material, data on the treatment time (date and / or time and / or duration) of the pressed body in the form of a board and / or material, data on the person in charge of the pressed body in the form of a board and / or material, data on the intended use of the pressed body in the form of a board and / or material, data on identification required by law of the pressed body in the form of a board and / or material, for example the CE mark or mark of l a certification of the wood or origin of the wood (PEFC, FSC).

The method according to the invention, the device according to the invention and the use according to the invention of a board-shaped material containing lignocellulose are characterized among other aspects by the following.

1. Traceability

Once the agglomerate board has left the press it can no longer be understood without more than what production parameters have been presented on the agglomerate board. This also applies to the machining stages connected downstream of compression such as profiling, grinding and coating. In the state of the art, data describing the production parameters and the machining stages mentioned are transmitted, with the help of the so-called package notes. However, if a package of boards (stacks of several individual boards arranged on top of each other in a flat manner) is subsequently treated for example by coating the individual boards this package must be removed and individualized and the data on this package is lost, in particular when processed chipboard panels are associated with different orders and stored individually. The invention allows, by means of the code that can be detected optically existing in each board-shaped material containing lignocellulose, to read the corresponding data at any time on the respective board on the data processing system or to be able to read directly from the edge strip so that at any time it can be distinguished which production parameters and machining stages have been presented or have been carried out so far.

2. Control of the logistics chain

The optical code applied on the edge of the strip can also correspond to the stored data / data sets that can be used to control the internal logistics chain of the preparation of orders for individual boards, comments on production, consumption accounting , packing until the final product is loaded.

3. Information for the manager

Board materials are used for a large number of the most diverse applications and therefore satisfy a large number of the most diverse requirements. The manufacturer is also obliged to test many features. Also this data, that is to say dashboard characteristics, indications on the processing of exam certificates, etc., can be stored and consulted at any time through the optical code by the person in charge.

4. Quality control

In addition, the applied optical code offers the possibility of a simple quality control in the case of claims, in particular through an especially rapid assessment of the process data of the coating process

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including secondary processes.

5. Advertising surface

Due to the poor printability hitherto the narrow surfaces of pressed bodies in the form of a board according to the state of the art cannot be used for advertising action prints. The song strip provided according to the invention is created at the same time so that graphic, conventional characters but also logos and other advertising messages can be printed. By means of the optical code, the target audience can be informed in a still more efficient way, essentially about the preferences of the product in question, specifically the material in the form of boards containing lignocellulose, for example also through images, internet pages, advertising videos, etc. stored and that can be consulted in memory.

There are now a large number of possibilities for configuring and perfecting the procedure according to the invention, the device according to the invention, the board-shaped material, which contains lignocellulose according to the invention and the use according to the invention. of a board-shaped material containing lignocellulose. For this, reference must be made on the one hand to the claims subordinate to revindication 1, on the other hand to the description of examples of realization in connection with the drawing. In the drawing they show:

Figure 1a) and b) a schematic representation of the procedure according to the invention,

Figure 2 a plan view of a printed edge strip with an optical code and

Figure 3 a device for performing the procedure according to the invention.

In Figure 1a), as in a process for the manufacture of a board-shaped material containing lignocellulose 1, which in this case is a board of material derived from wood 1, is represented, initially a pressed body 2 is produced in board shape having a main surface on the upper side 2.1, a main surface on the lower side 2.2 and at least one narrow lateral surface 2.3, which joins the main surfaces together. The pressed body 2 is manufactured by compressing material containing lignocellulose 3 provided with binder, for example wood chips, wood strands and / or wood fibers, at elevated pressure and elevated temperature. The manufacturing process will be further explained later by figure 3.

In figure 1a) it is also represented as a edge strip 4, which in this case by way of example is composed of two layers 4.1 of kraft paper, on which at least one narrow surface 2.3 of the pressed body is applied as board 2. The edge strip 4 has, as can be clearly seen in Figure 1a) a roughness that is smaller than that of the narrow surface 2.3 on which the edge strip 4 is applied.

Figure 1a) also shows that the pressed body 2 already before the application of the edge strip 4 has been provided with a coating 2.4, for example with a lacquer or a sheet.

Figure 1 b) shows the board-shaped material, which contains lignocellulose 1 after the application of the edge strip 4 on the narrow surface 2.3, the edge strip 4 having been printed on the representation already with an optical code 5 The code 5 has been printed either before or after the application of the edge strip 4 on the narrow surface 2.3, for example by means of an inkjet or laser printer (not shown). Optical code 5 will be described below in more detail.

The edge strip 4 has a thickness d of less than 1 mm, in this case by way of example less than 0.5 mm. In the sense of the invention it is meant the thickness d that the edge strip 4 has before the application on the narrow surface 2.3. This relatively low thickness d is nevertheless sufficient to fill and therefore level the pores and inequalities of the narrow lateral surface 2.3.

As shown in Figure 1b) the edge strip 4 is applied on the entire narrow side surface 2.3, although it is also fundamentally possible to apply the edge strip 4 also only on a part of the narrow surface 2.3.

Therefore the edge strip 4 is provided with an optical code 5. In the case of the optical code 5, in the example shown in Figure 1b) it is an essentially square two-dimensional code, in this case a matrix data code. Figure 2 shows a edge strip 4, which has been printed with several sections of code 5.1,

5.2 and 5.3 essentially square, each code section also forming alone (for itself) a complete optical code 5 in the sense of the present invention. In the case of each section of code 5.1, 5.2 and 5.3 it is also in this case a matrix data code. Each of these codes 5 or sections of code 5.1, 5.2 and

5.3 includes in encrypted form data that refers and / or to the board-shaped material, which contains lignocellulose and / or identifies it for example data on machining stages carried out and / or that remain to be made, intended uses etc.

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As shown in Figure 2, the edge strip 4 has a length l that is selected so that it corresponds to a maximum of 150% of the length of the optical code 5, which is composed in this case of several sections of code 5.1, 5.2 and 5.3. As Figure 2 also shows, the edge strip 4 also has a width b that is selected so that it corresponds to a maximum of 150% of the width of the optical code 5.

The individual code sections 5.1, 5.2 and 5.3 represented in Figure 2 include in each case coded data on a special machining stage, that is the code sections 5.1, 5.2 and 5.3 are configured (formed) different from each other. the others. The individual code sections 5.1, 5.2 and 5.3 were applied at consecutive intervals on the edge strip 4 always after a certain machining stage in the machining of board-shaped material containing lignocellulose, 1, has been completed.

Figure 3 shows by means of a device 9 a process for the manufacture of a board-shaped material containing lignocellulose 1, as already described above.

Initially, material containing lignocelluloses 3 is spread, in this case, for example, wood chips, wood strands and / or wood fibers provided with binder on a conveyor belt 15 in one or more layers. The spread material 3 is then fed to a continuous pressing device 10 which is configured so that it compresses material 3 of small pieces, in this case chips, strands and / or wood fibers 3 glued with a binder, at elevated pressure and high temperature to form a pressed body in the form of a board 2 with a main surface on the upper side 2.1, a main surface on the lower side 2.2 and at least one narrow lateral surface 2.3.

The agglomerate board 2 produced in this way is then fed to a edging device 11 that is configured so that a edge strip 4, which in this case is provided as a rolled product 6, is applied on the at least one narrow surface 2.3. In the case of the edge strip 4 it is one with a roughness that is smaller than that of the narrow surface 2.3 of the pressed body in the form of a board 2.

The board-shaped material containing lignocellulose 1 edged in this way is then fed to a printing device 12 that is configured so that it can print on the edge strip 4 an optical code 5 as described above. Fundamentally, it is also conceivable that the printing device 12 has several print heads spaced apart from each other that print on the edge strip 4 at time intervals and in different places an optical code 5 or a section of code 5.1, 5.2 or 5.3 in each case.

The device 9 also has a data processing system 7 that contains a memory (a storage medium) 13 that is configured so that it can store data referring to the board-shaped material, which contains lignocellulose 1.

In addition, the device 9 has a reading device 8 that is configured so that it can detect the optical code 5 and transfer it to the data processing system 7. In the data processing system 7 the optical code or the signals transferred by the The reading apparatus 8 is associated with a data set deposited in the memory 13, the data in the data set can then be transferred to additional machining stations (not shown) of the device 9, to perform corresponding machining stages in these places.

The data can also be transferred to a display device 14 that is configured so that it can display the received data referring to the board-shaped material containing lignocellulose 1. The display device can also be a smart phone or other device with Internet connection.

Claims (15)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 claims 1. Procedure for manufacturing a board-shaped material containing lignocellulose (1), in which the following steps are carried out: - produce a pressed board-shaped body (2) with a main surface on the upper side (2.1), a main surface on the lower side (2.2) and at least one narrow side surface (2.3) by compression of material containing lignocellulose provided with binders (3) at elevated pressure and elevated temperature, - provide a strip of material in a thickness (d) of a maximum of 3 mm as a edge strip (4) containing one or more layers (4.1) of resin impregnated paper, ABS, PP, PVC and / or melamine, being the roughness of the edge strip (4) at least on a smaller side than that of the narrow surface (2.3) on which the edge strip (4) is applied, - apply the edge strip (4), which can be printed with a resolution of at least 60 dpi, on at least a part of the at least one narrow surface (2.3) and - print on the edge strip (4) an optical code (5) after application on the at least one narrow surface (2, 3), the code (5) being printed on the edge strip (4) in a resolution of at least 60 dpi and corresponding to data deposited in a data processing system (7) that refer to the board-shaped material containing lignocellulose (1). 2. Procedure according to revindication 1, characterized in that the edge strip (4) is provided in a thickness (d) of a maximum of 2 mm, preferably of a maximum of 1 mm. 3. Method according to one of the preceding claims, characterized in that as a edge strip (4) a strip of material containing a selective laser additive, in particular selective laser pigments, is provided. 4. Method according to one of the preceding claims, characterized in that the roughness according to Bendtsen amounts to a maximum of 450 ml / min, preferably a maximum of 200 ml / min, especially preferably a maximum of 100 ml / min, and / or the roughness according to Parker Print Surf at a maximum of 10 | jm, preferably at a maximum of 5 jm, especially preferably a maximum of 2 jm, and / or the roughness according to Bekk at least 10 s, preferably at least 50 s, of especially preferably at least 100 s. 5. Method according to one of the preceding claims characterized in that the optical code (5) is complemented with an additional code section (5.2) (5.3) once or several times in each case after a time interval, in particular in each case after a machining stage of the pressed body (2). Method according to one of the preceding claims, characterized in that the optical code (5) is applied to the edge strip (4) by means of a contactless printing process, in particular by means of an ink printing process. or by laser, and / or is detected by a reading device (8) and transferred to the data processing system (7). Method according to one of the preceding claims, characterized in that as an optical code a code is printed containing at least one two-dimensional and / or three-dimensional code, in particular at least one matrix code, preferably a matrix data code. Method according to one of the preceding claims, characterized in that as a pressed body (2) by compression, a board-shaped body (2) with a thickness (D) of at least 5 mm, preferably at least 8, is produced mm, especially preferably at least 10 mm. 9. Method according to one of the preceding claims, characterized in that wood chips, wood strands and / or wood fibers are used in the compression as a material containing lignocellulose (3). Method according to one of the preceding claims, characterized in that the percentage of the material containing lignocellulose (3) in the pressed body (2) amounts to at least 50% by volume, preferably to at least 75% by volume, especially preferably at least 90% by volume. Method according to one of the preceding claims, characterized in that the application of the edge strip (4) on the pressed body (2) is carried out before or after a coating on at least one of the main surfaces (2.1,2.2 ) of the pressed body (2). Method according to one of the preceding claims, characterized in that, after the application of the edge strip (4) on the pressed body (2), a part of the pressed body (2) provided with the edge strip (4) it separates at a place of separation, whereby the pressed body (2) at the place of separation obtains a new narrow surface, in particular the new narrow surface of the pressed body (2). 13. Device (9) for the manufacture of a board-shaped material containing lignocellulose (1), in particular to carry out a method according to one of the preceding claims, - with a pressure device (10), which is configured to compress small piece material at elevated pressure and elevated temperature and to produce a chipboard (2) with a main surface on the upper side (2.1), a main surface on the lower side (2.2) and at least one narrow side surface 5 (2.3), - with a device for edging (11), which is configured to apply a edge strip (4), which can be printed with a resolution of at least 60 dpi, of a thickness (d) of a maximum of 3 mm over the at least a narrow surface (2.3), which is formed with a strip of material containing one or several layers (4.1) of paper impregnated in resin, ABS, PP, PVC and / or melamine, the roughness of the edge strip (4 ) at least in 10 a side smaller than that of the narrow surface (2.3) on which the edge strip (4) is applied, - with a printing device (12), which is configured to print on the edge strip (4) applied an optical code (5) in a resolution of at least 60 dpi, and - with a data processing system (7), which has a memory (13) that is configured for data storage that refers to the board-shaped material containing lignocellulose (1). fifteen 14. Device (9) according to claim 13, characterized in that the device (9) has a reading device (8), which is configured to detect the optical code (5) and transfer the optical code (5) to the system data processing (7), and / or a display device (14), which is configured to display received data that refers to the board-shaped material containing lignocellulose (1). twenty 15. Use of a board-shaped material containing lignocellulose (1), manufactured by a method according to one of claims 1 to 12, which has a pressed body (2) in the form of a board with a main surface on the upper side (2.1), a main surface on the lower side (2.2) and at least one narrow lateral surface (2.3) as well as a edge strip (4) applied on the at least one narrow surface (2.3) and 25 printed with an optical code (5) in a resolution of at least 60 dpi, for the processing of data referring to the board-shaped material containing lignocellulose (1).