EP4005757A1 - Method and system for the production of material panels - Google Patents
Method and system for the production of material panels Download PDFInfo
- Publication number
- EP4005757A1 EP4005757A1 EP21203626.3A EP21203626A EP4005757A1 EP 4005757 A1 EP4005757 A1 EP 4005757A1 EP 21203626 A EP21203626 A EP 21203626A EP 4005757 A1 EP4005757 A1 EP 4005757A1
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- EP
- European Patent Office
- Prior art keywords
- composite strand
- profiling
- continuous press
- material panels
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
- B27N3/183—Forming the mat-edges, e.g. by cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C5/00—Machines designed for producing special profiles or shaped work, e.g. by rotary cutters; Equipment therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C5/00—Machines designed for producing special profiles or shaped work, e.g. by rotary cutters; Equipment therefor
- B27C5/08—Rounding machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D3/00—Veneer presses; Press plates; Plywood presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D3/00—Veneer presses; Press plates; Plywood presses
- B27D3/04—Veneer presses; Press plates; Plywood presses with endless arrangement of moving press plates, belts, or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
- B27D5/003—Other working of veneer or plywood specially adapted to veneer or plywood securing a veneer strip to a panel edge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N5/00—Manufacture of non-flat articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
- B27N7/005—Coating boards, e.g. with a finishing or decorating layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/08—Accessory tools, e.g. knives; Mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/32—Discharging presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/34—Heating or cooling presses or parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
- B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
- B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
Definitions
- the invention relates to a process for the production of material panels, in which particles are pressed in a continuous press between two circulating belts with the supply of heat to form a composite strand and the composite strand emerging from the continuous press is then cut into material panels of the desired size and with a profiling process to achieve a non-rectangular material plate cross-section.
- the invention also relates to a system for producing material panels with a heatable continuous press, a cutting device for producing material panels from a composite strand of pressed particles emerging from the continuous press, and a profiling device for achieving a non-rectangular material panel cross-section.
- Material boards are primarily understood to mean wood material boards that have already been produced in a preferably continuous press and subsequently cut with saws.
- Chipboard, MDF or OSB boards come into consideration here, with the particles mentioned in the introduction then essentially being wood fibers or wood chips that have been provided with a binding agent.
- other lignocellulosic materials for example the fibers of annual plants (e.g. from rice straw) have also been used for pressing material boards.
- material boards can also be insulating boards, gypsum boards, plastic boards or other material boards, the particles of which have been pressed by means of circulating belts in a continuous press with the application of heat. Such a press is at the Applicant marketed with the name ContiRoll.
- Binding agents are usually added to the particles before the continuous press, so that the material panels have a high level of stability.
- the composite strand of the possible particles mentioned which is produced in this way in the continuous press and emerges from the continuous press can, of course, be described as clearly flat in cross-section in the context of the production of material panels by subsequent cutting processes. As a rule, the height of the composite strand emerging from the press is not even a hundredth of its width.
- the profiling process mentioned in the preamble is primarily a contouring, in particular at the edge of a material panel, which can be reached by cutting or milling tools. However, within the scope of the invention, the profiling should not be limited to the edge.
- coatings are also known for chipboard or MDF boards. Coatings made of (resin-soaked) paper, linoleum or plastic foils are mentioned here as examples.
- the finished panels often have similar edge shapes. Such panels are found, for example, in the furniture industry, where, depending on customer requirements, such edge shapes are incorporated into the material panels using cutting or milling tools.
- the object of the invention is to simplify the process for producing profiled material panels.
- the object is achieved by the features of the first claim and in particular by the fact that the profiling process takes place before the material panels have cooled to ambient temperature.
- the profiling can already be carried out on the edges of the composite strand, which is later cut into material panels, as long as this has not yet cooled down.
- the material panels at least do not have to be reprofiled on the side that was previously the longitudinal side of the composite strand.
- the trimming device and the profiling device can be combined into one processing unit.
- One - as is customary today - later-acting assembly group for profiling can be omitted completely or at least made significantly smaller.
- the profiling process takes place before the material panels have cooled to the mean temperature between the temperature of the composite strand at the outlet of the continuous press and the ambient temperature.
- the profiling of the composite strand can also be carried out without difficulty at temperatures above the temperature between the outlet temperature of the composite strand from the continuous press and the ambient temperature, without undesirable stresses subsequently occurring in the material panels.
- the profiling process is carried out between the exit of the composite strand from the continuous press and a saw for dividing the composite strand into individual sections.
- the individual sections which often already correspond to the later material plate size, then already have two profiled edges and no longer have to wait for the cooling process, for example in a star turner, before they are profiled.
- the time saving allows for either faster production or fewer post-processing machines.
- the profiling process preferably includes a partial round milling of the side edge of the composite strand.
- Partial round milling in particular is much more complex afterwards than if it is carried out directly behind the continuous press or a trimming device.
- the composite strand is coated on at least one side between the profiling process and the division of the composite strand into individual sections.
- coating can also take place before the composite strand is divided into individual sections, in a manner that simplifies the process.
- the coating preferably takes place with a paper or film lamination, the paper or film being connected, in particular glued, to at least one side of the composite strand.
- One side means the top or bottom of the flat composite strand.
- the coating material paper or film
- the coating material can, for example, be unwound from a roll and pressed onto the respective side.
- it is sprayed with an adhesive, for example.
- the new arrangement of the processing steps has the particular advantage that the bonded strand is still warm, which can have a very beneficial effect on the gluing process.
- the object is finally achieved in terms of system by the features of claim 8 and in particular by the fact that the profiling process is carried out by a profiling device which is arranged a maximum of 20 m behind the exit point of the composite strand from the continuous press.
- the expense for a separate profiling device after the composite strand has been divided into individual sections is eliminated or greatly reduced as a result.
- the profiling device can be combined with the trimming device after the press.
- the profiling device is located between the exit point of the composite strand from the continuous press and a saw for dividing the composite strand into individual sections.
- the profiling device already includes a rounding cutter.
- a coating device to be arranged between the profiling device and the saw.
- the coating device comprises a one-sided or two-sided unwind for papers or foils which can be connected to the composite strand as a coating.
- FIG. 1 shows a plant for the production of a material panel 1 in a top view, wherein for reasons of clarity, both the representation of a composite strand and the representation of the cut material panel are omitted.
- the deflection arrows indicate that the installation in the top row continues in the bottom row.
- a composite strand is created between two circulating press belts by a mat of scattered particles that are in the Usually wetted with a binder, it is compacted under pressure and heat. In many cases, the particles are lignocellulosic fibers or wood chips, but should not be restricted to these within the scope of the invention.
- the mat emerges compacted as a composite strand at the outlet of the continuous press 2a with a temperature T2 and is brought to a trimming device 4 via only one conveyor track 3 (shown here as a roller carpet), where unclean edges or the desired width are cut with a trimming cutting tool 5.
- the composite strand retains its rectangular, flat cross-section.
- the profiling device 6 follows, in which, according to the invention, the composite strand is profiled, in particular at the edges, so that the composite strand no longer has a rectangular cross section.
- a partial round milling cutter 7 is provided for the edge 20 for this purpose.
- this profiling takes place well before the composite strand, which exits the press at a temperature T2, has reached the ambient temperature T1.
- the distance between the press outlet 2a and the profiling device is at least 20 m away and is in any case in front of a dividing saw, here in the form of a diagonal saw 11.
- the composite strand can even be so warm that it is even above that of the averaged Temperature is between the temperature at the outlet T2 from the continuous press 2a and the ambient temperature T1.
- the profiled composite strand is transported to a coating device 9 via a bridging conveyor 8 .
- a coating device 9 For the embodiment can be seen in particular considering the 2 at least one unwinding roll 12a with an upper coating material 18a, and alternatively or jointly at least one unwinding roll 12b for the lower one Coating Material 18b.
- Foils or (resin-impregnated) paper are customary and can be used as coating material.
- an upper paper web (upper coating material 18a) and a lower paper web (lower coating material 18b) is pulled off the unwinding rolls 12a, 12b, coated with adhesive by an adhesive supply 13 in each case and finally via pressable and possibly heatable pressure rollers 14 with the upper and lower side of the bonded strand.
- a finishing device for the coating 10 in which, for example, a wider upper coating web 18a is deflected around a rounded edge of the composite strand, for example, and the end is glued to the underside of the composite strand, for example overlapping with the lower coating material 18b.
- a wider upper coating web 18a is deflected around a rounded edge of the composite strand, for example, and the end is glued to the underside of the composite strand, for example overlapping with the lower coating material 18b.
- Such a (usually circular) saw runs at an angle over the continuous composite strand in order to thereby achieve a right-angled cut to the feed direction.
- FIG. 3 shows a typical embodiment of a gypsum plasterboard in section, with the figure focusing on the design of the edge 20, ie the profiling. In addition, it is indicated how an upper coating paper 18a and a lower coating paper 18b on the
- Composite strand 16 is bonded.
- the upper coating paper 18a is guided around the milled edge 20 in the finishing device for coatings 10 down to the underside of the composite strand 16 and on the underside overlaps with the lower coating paper 18b.
- the edge 20 itself was created beforehand in the profiling device 6 with a milling cutter 7 which is suitable for producing the desired curves 17 and bevels.
Abstract
Die Erfindung betrifft ein Verfahren und eine Anlage zur Herstellung von Werkstoffplatten, bei dem Partikel in einer kontinuierlichen Presse zwischen zwei umlaufenden Bändern unter Wärmezufuhr zu einem Verbundstrang verpresst werden und der nachfolgend der aus der kontinuierlichen Presse (2) austretende Verbundstrang zu Werkstoffplatten gewünschter Größe geschnitten und mit einem Profilierungsvorgang zur Erzielung eines nichtrechteckigen Werkstoffplattenquerschnittsversehen wird. Um den Herstellprozess zu beschleunigen, ist vorgesehen, dass der Profiliervorgang in einer Profilierungseinrichtung (6) erfolgt, bevor die Werkstoffplatten auf Umgebungstemperatur abgekühlt sind.The invention relates to a method and a plant for the production of material panels, in which particles are pressed in a continuous press between two circulating belts with the supply of heat to form a composite strand and the composite strand emerging from the continuous press (2) is then cut into material panels of the desired size and is provided with a profiling operation to obtain a non-rectangular material panel cross-section. In order to speed up the production process, it is provided that the profiling process takes place in a profiling device (6) before the material panels have cooled to ambient temperature.
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von Werkstoffplatten, bei dem Partikel in einer kontinuierlichen Presse zwischen zwei umlaufenden Bändern unter Wärmezufuhr zu einem Verbundstrang verpresst werden und der nachfolgend der aus der kontinuierlichen Presse austretende Verbundstrang zu Werkstoffplatten gewünschter Größe geschnitten und mit einem Profilierungsvorgang zur Erzielung eines nichtrechteckigen Werkstoffplattenquerschnittsversehen wird.The invention relates to a process for the production of material panels, in which particles are pressed in a continuous press between two circulating belts with the supply of heat to form a composite strand and the composite strand emerging from the continuous press is then cut into material panels of the desired size and with a profiling process to achieve a non-rectangular material plate cross-section.
Die Erfindung betrifft außerdem eine Anlage zur Herstellung von Werkstoffplatten mit einer beheizbaren kontinuierlichen Presse, einer Schneideinrichtung zur Erzeugung von Werkstoffplatten aus einem aus der kontinuierlichen Presse austretenden Verbundstrang von gepressten Partikeln und einer Profilierungseinrichtung zur Erzielung eines nichtrechteckigen Werkstoffplattenquerschnitts.The invention also relates to a system for producing material panels with a heatable continuous press, a cutting device for producing material panels from a composite strand of pressed particles emerging from the continuous press, and a profiling device for achieving a non-rectangular material panel cross-section.
Unter Werkstoffplatten werden in erster Linie Holzwerkstoffplatten verstanden, die bereits in einer vorzugsweise kontinuierlichen Presse hergestellt und im Folgenden mit Sägen geschnitten wurden. Hier kommen beispielsweise Span-, MDF- oder OSB-Platten in Frage, wobei die in der Einleitung genannten Partikel dann im Wesentlichen Holzfasern oder Holzspäne sind, die mit einem Bindemittel versehen wurden. In neuerer Zeit werden auch andere lignocellulosische Materialien, beispielsweise die Fasern von Einjahrespflanzen (z. B. aus Reisstroh) zum Verpressen von Werkstoffplatten genutzt. Werkstoffplatten können im Sinne der Erfindung aber auch Dämmplatten, Gipsplatten, Kunststoffplatten oder andere Werkstoffplatten sein, deren Partikel mittels umlaufender Bänder in einer kontinuierlichen Presse mit Wärmebeaufschlagung gepresst wurden. Eine solche Presse wird bei der Anmelderin mit dem Namen ContiRoll vermarktet. Dabei werden den Partikeln in der Regel vor der kontinuierlichen Presse Bindemittel beigefügt, damit die Werkstoffplatten eine hohe Stabilität erhalten. Der in der kontinuierlichen Presse auf diese Weise hergestellte und aus der kontinuierlichen Presse austretende Verbundstrang der genannten möglichen Partikel ist im Rahmen der Herstellung von Werkstoffplatten durch anschließende Schneidvorgänge selbstverständlich im Querschnitt als deutlich flach zu bezeichnen. In der Regel ist die Höhe des aus der Presse austretenden Verbundstrangs nicht einmal ein Hundertstel seiner Breite.Material boards are primarily understood to mean wood material boards that have already been produced in a preferably continuous press and subsequently cut with saws. Chipboard, MDF or OSB boards, for example, come into consideration here, with the particles mentioned in the introduction then essentially being wood fibers or wood chips that have been provided with a binding agent. More recently, other lignocellulosic materials, for example the fibers of annual plants (e.g. from rice straw) have also been used for pressing material boards. In the sense of the invention, material boards can also be insulating boards, gypsum boards, plastic boards or other material boards, the particles of which have been pressed by means of circulating belts in a continuous press with the application of heat. Such a press is at the Applicant marketed with the name ContiRoll. Binding agents are usually added to the particles before the continuous press, so that the material panels have a high level of stability. The composite strand of the possible particles mentioned which is produced in this way in the continuous press and emerges from the continuous press can, of course, be described as clearly flat in cross-section in the context of the production of material panels by subsequent cutting processes. As a rule, the height of the composite strand emerging from the press is not even a hundredth of its width.
Bei dem im Oberbegriff genannten Profilierungsvorgang handelt es sich in erster Linie um eine Konturgebung, insbesondere am Rand einer Werkstoffplatte, die durch Schneid- oder Fräswerkzeuge erreichbar ist. Die Profilierung soll im Rahmen der Erfindung aber nicht auf den Rand beschränkt sein.The profiling process mentioned in the preamble is primarily a contouring, in particular at the edge of a material panel, which can be reached by cutting or milling tools. However, within the scope of the invention, the profiling should not be limited to the edge.
Diese Profilierung ist beispielsweise sinnvoll, wenn bei dem Verbundstrang, der aus der kontinuierlichen Presse austritt, sich die Partikel am Rand wieder aufrichten, so dass die Kante dicker ist als die Mitte des Verbundstranges. Das führt zu Problemen bei einem möglicherweise folgenden Anstrich oder einer Beschichtung durch Papiere oder Folien. Es sind zur Veranschaulichung auch verschiedene genormte Kantenformen bei Gipskartonplatten bekannt, bei denen die Kanten abgeschrägt und/oder abgerundet sind (DIN EN 520).This profiling makes sense, for example, if the particles on the edge of the composite strand that emerges from the continuous press straighten up again, so that the edge is thicker than the middle of the composite strand. This leads to problems with a possible subsequent painting or coating with paper or foils. Various standardized edge shapes for gypsum plasterboard are also known for illustration purposes, in which the edges are beveled and/or rounded (DIN EN 520).
Aber auch bei Span- oder MDF-Platten sind Beschichtungen bekannt. Beispielhaft seien hier Beschichtungen aus (harzgetränkten) Papieren, Linoleum oder Kunststofffolien genannt. Oft haben die fertigen Werkstoffplatten ähnliche Kantenformen. Man findet solche Platten beispielsweise in der Möbelindustrie, wo je nach Kundenwunsch derartige Kantenformen in die Werkstoffplatten über Schneid- oder Fräswerkzeuge eingebracht werden.However, coatings are also known for chipboard or MDF boards. Coatings made of (resin-soaked) paper, linoleum or plastic foils are mentioned here as examples. The finished panels often have similar edge shapes. Such panels are found, for example, in the furniture industry, where, depending on customer requirements, such edge shapes are incorporated into the material panels using cutting or milling tools.
Dies geschieht heutzutage jedoch immer nach der Fertigstellung der Werkstoffplatten, nachdem sie weitgehend ausgekühlt sind. Das heißt, dass der in einzelne Abschnitte geschnittene Verbundstrang zunächst in großen Sternwendern, wie sie beispielsweise aus der
Die Erfindung setzt sich zur Aufgabe, den Prozess zur Herstellung von profilierten Werkstoffplatten zu vereinfachen.The object of the invention is to simplify the process for producing profiled material panels.
Die Aufgabe wird verfahrenssmäßig durch die Merkmale des ersten Anspruchs und insbesondere dadurch gelöst, dass der Profiliervorgang erfolgt, bevor die Werkstoffplatten auf Umgebungstemperatur abgekühlt sind.In terms of the method, the object is achieved by the features of the first claim and in particular by the fact that the profiling process takes place before the material panels have cooled to ambient temperature.
Dadurch wird eine enorme Zeitersparnis im Herstellvorgang der Werkstoffplatten erzielt. Überraschend wurde erkannt, dass man die Profilierung an den Kanten des Verbundstranges, der später in Werkstoffplatten geschnitten wird, bereits vornehmen kann, solange dieser noch nicht abgekühlt ist. Somit muss man die Werkstoffplatten nach dem Aufteilungsschnitt zumindest nicht an der Seite neu profilieren, die vorher die Längsseite des Verbundstranges war. Zwischen dem Austrittspunkt aus der kontinuierlichen Presse und der Profilierung liegt gegebenenfalls lediglich eine Besäumungsvorrichtung, um die gewünschte Plattenbreite herzustellen. In diesem Fall kann die Besäumungseinrichtung und die Profilierungseinrichtung zu einer Bearbeitungseinheit vereint werden. Eine - wie heute üblich - später wirkende Baugruppe zur Profilierung kann vollständig entfallen oder zumindest deutlich kleiner ausgeführt werden.This saves an enormous amount of time in the manufacturing process of the material panels. Surprisingly, it was found that the profiling can already be carried out on the edges of the composite strand, which is later cut into material panels, as long as this has not yet cooled down. Thus, after the splitting cut, the material panels at least do not have to be reprofiled on the side that was previously the longitudinal side of the composite strand. If necessary, there is only a trimming device between the exit point from the continuous press and the profiling in order to produce the desired panel width. In this case, the trimming device and the profiling device can be combined into one processing unit. One - as is customary today - later-acting assembly group for profiling can be omitted completely or at least made significantly smaller.
Es ist von Vorteil, wenn der Profiliervorgang erfolgt, bevor die Werkstoffplatten auf die gemittelte Temperatur zwischen der Temperatur des Verbundstranges am Austritt der kontinuierlichen Presse und der Umgebungstemperatur abgekühlt ist.It is advantageous if the profiling process takes place before the material panels have cooled to the mean temperature between the temperature of the composite strand at the outlet of the continuous press and the ambient temperature.
Das verkürzt die Größe der Anlage zur Herstellung einer Werkstoffplatte besonders stark. Es hat sich herausgestellt, dass auch die Profilierung des Verbundstranges auch bei Temperaturen oberhalb der Temperatur zwischen der Austrittstemperatur des Verbundstranges aus der kontinuierlichen Presse und der Umgebungstemperatur ohne Schwierigkeiten durchführbar ist, ohne dass sich später unerwünschte Spannungen in den Werkstoffplatten einstellen.This reduces the size of the plant for the production of a material panel particularly greatly. It has been found that the profiling of the composite strand can also be carried out without difficulty at temperatures above the temperature between the outlet temperature of the composite strand from the continuous press and the ambient temperature, without undesirable stresses subsequently occurring in the material panels.
Es ist bevorzugt, wenn der Profiliervorgang zwischen dem Austritt des Verbundstranges aus der kontinuierlichen Presse und einer Säge zur Aufteilung des Verbundstranges in einzelne Abschnitte durchgeführt wird.It is preferred if the profiling process is carried out between the exit of the composite strand from the continuous press and a saw for dividing the composite strand into individual sections.
Die einzelnen Abschnitte, die oftmals bereits der späteren Werkstoffplattengröße entspricht, haben dann bereits zwei profilierte Kanten und müssen nicht mehr den Abkühlvorgang, beispielsweise in einem Sternwender abwarten, bevor sie profiliert werden. Die Zeiteinsparung ermöglicht entweder eine schnellere Produktion oder weniger Nachbearbeitungsmaschinen.The individual sections, which often already correspond to the later material plate size, then already have two profiled edges and no longer have to wait for the cooling process, for example in a star turner, before they are profiled. The time saving allows for either faster production or fewer post-processing machines.
Bevorzugterweise umfasst der Profiliervorgang eine Teilrundfräsung der Seitenkante des Verbundstranges.The profiling process preferably includes a partial round milling of the side edge of the composite strand.
Gerade eine Teilrundfräsung ist im Nachhinein viel aufwändiger als wenn sie direkt hinter der kontinuierlichen Presse oder einer Besäumungsvorrichtung erfolgt.Partial round milling in particular is much more complex afterwards than if it is carried out directly behind the continuous press or a trimming device.
Es ist von besonderem Vorteil, wenn zwischen dem Profiliervorgang und der Aufteilung des Verbundstranges in einzelne Abschnitte eine wenigstens einseitige Beschichtung des Verbundstranges stattfindet.It is of particular advantage if the composite strand is coated on at least one side between the profiling process and the division of the composite strand into individual sections.
Dadurch dass die Profilierung bereits vor der Aufteilung des Verbundstranges in einzelne Abschnitte, beispielsweise an einer Diagonal-Kreissäge erfolgt, kann auch eine Beschichtung in einer den Prozess vereinfachenden Weise bereits vor der Aufteilung des Verbundstranges in einzelne Abschnitte erfolgen.Due to the fact that the profiling takes place before the composite strand is divided into individual sections, for example on a diagonal circular saw, coating can also take place before the composite strand is divided into individual sections, in a manner that simplifies the process.
Es ist sogar möglich, dass zwischen dem Profiliervorgang und der Aufteilung des Verbundstranges in einzelne Abschnitte eine beidseitige Beschichtung des Verbundstranges stattfindet.It is even possible for the composite strand to be coated on both sides between the profiling process and the division of the composite strand into individual sections.
Bevorzugt erfolgt die Beschichtung mit einer Papier- oder Folienkaschierung, wobei das Papier bzw. die Folie mit wenigstens einer Seite des Verbundstranges verbunden, insbesondere verklebt wird.The coating preferably takes place with a paper or film lamination, the paper or film being connected, in particular glued, to at least one side of the composite strand.
Mit einer Seite ist die Ober- oder Unterseite des flachen Verbundstranges gemeint. Dabei kann das Beschichtungsmaterial (Papier oder Folie) beispielsweise von einer Rolle abgewickelt und an die jeweilige Seite angedrückt werden. Zusätzlich wird es beispielsweise mit einem Klebstoff eingesprüht. Die neue Anordnung der Bearbeitungsschritte hat dabei den besonderen Vorteil, dass der Verbundstrang immer noch warm ist, was sich sehr vorteilhaft auf den Klebevorgang auswirken kann.One side means the top or bottom of the flat composite strand. The coating material (paper or film) can, for example, be unwound from a roll and pressed onto the respective side. In addition, it is sprayed with an adhesive, for example. The new arrangement of the processing steps has the particular advantage that the bonded strand is still warm, which can have a very beneficial effect on the gluing process.
Die Aufgabe wird schließlich anlagenmäßig durch die Merkmale des Anspruchs 8 und insbesondere dadurch gelöst, dass der Profiliervorgang durch eine Profiliereinrichtung erfolgt, die maximal 20 m hinter dem Austrittspunkt des Verbundstranges aus der kontinuierlichen Presse angeordnet ist.The object is finally achieved in terms of system by the features of
Die Vorteile ergeben sich analog zu den bereits beschriebenen Vorteilen des erfindungsgemäßen Verfahrens. Es wird also sichergestellt, dass die Profilierung sehr rasch in einem noch warmen Zustand des Verbundstranges erfolgen kann.The advantages result analogously to the advantages of the method according to the invention that have already been described. It is thus ensured that the profiling can take place very quickly while the composite strand is still warm.
Es ist von Vorteil, wenn zwischen dem Austrittspunkt des Verbundstranges aus der kontinuierlichen Presse und der Profiliereinrichtung lediglich eine Förderbahn angeordnet ist.It is advantageous if only one conveyor track is arranged between the exit point of the composite strand from the continuous press and the profiling device.
Der Aufwand für eine separate Profilierungsvorrichtung nach einer Aufteilung des Verbundstranges in einzelne Abschnitte entfällt dadurch oder wird stark verringert. Die Profilierungsvorrichtung kann mit der Besäumungsvorrichtung nach der Presse kombiniert sein.The expense for a separate profiling device after the composite strand has been divided into individual sections is eliminated or greatly reduced as a result. The profiling device can be combined with the trimming device after the press.
So wird es von Nutzen, wenn die Profiliereinrichtung zwischen dem Austrittspunkt des Verbundstranges aus der kontinuierlichen Presse und einer Säge zur Aufteilung des Verbundstranges in einzelne Abschnitte angeordnet ist.Thus, it is useful if the profiling device is located between the exit point of the composite strand from the continuous press and a saw for dividing the composite strand into individual sections.
Es ist bevorzugt, wenn die Profiliereinrichtung bereits einen Abrundfräser umfasst.It is preferred if the profiling device already includes a rounding cutter.
Nimmt man beispielsweise die genormte Kante einer Gipskartonplatte als Grundlage, so ist diese bereits vor der Säge herstellbar.For example, if you take the standardized edge of a plasterboard as a basis, it can be produced before the saw.
Und so wird es in vorteilhafter Weise möglich, dass zwischen der Profiliereinrichtung und der Säge eine Beschichtungseinrichtung angeordnet ist.And so it is advantageously possible for a coating device to be arranged between the profiling device and the saw.
Dabei ist bevorzugt, wenn die Beschichtungseinrichtung eine ein- oder beidseitige Abrollung für Papiere oder Folien umfasst, die als Beschichtung mit dem Verbundstrang verbindbar sind.It is preferred here if the coating device comprises a one-sided or two-sided unwind for papers or foils which can be connected to the composite strand as a coating.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels darstellender Zeichnungen näher erläutert. Es zeigen
-
Fig. 1 eine Anlage zur Herstellung einer Werkstoffplatte im Sinne der Erfindung in einer Draufsicht (aus Übersichtsgründen wird ein gerader Transportweg in zwei Reihen dargestellt), -
Fig. 2 eine Seitenansicht der Beschichtungseinrichtung ausFig. 1 und -
Fig. 3 eine Beispielausführung einer beschichteten Kantenprofilierung -
Fig. 4 eine Beispielausführung einer Profilierung im mittleren Bereichs des Verbundstrangs.
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1 a plant for the production of a material panel according to the invention in a top view (for reasons of clarity, a straight transport path is shown in two rows), -
2 a side view of thecoating device 1 and -
3 an example of a coated edge profile -
4 an example of a profiling in the central area of the composite strand.
Auf der linken Seite der oberen Reihe erkennt man das Ende einer kontinuierlichen Presse 2. Eine solche Presse, die von der Anmelderin unter dem Namen ContiRoll vermarktet wird, ist hinlänglich bekannt und muss nicht näher dargestellt werden. Zwischen zwei umlaufenden Pressbändern wird ein Verbundstrang erzeugt, indem eine Matte von gestreuten Partikeln, die in der Regel mit einem Bindemittel benetzt sind, unter Druck und Wärmezufuhr verdichtet wird. Vielfach handelt es sich bei den Partikeln um lignocellulosische Fasern oder Holzspäne, soll aber im Rahmen der Erfindung nicht darauf beschränkt sein. Die Matte tritt verdichtet als Verbundstrang am Austritt der kontinuierlichen Presse 2a mit einer Temperatur T2 aus und wird über lediglich eine Förderbahn 3 (hier als Rollenteppich dargestellt) zu einer Besäumungseinrichtung 4 gebracht, wo mit einem Besäumungsschneidwerkzeug 5 unsaubere Ränder oder die gewünschte Breite geschnitten werden. Der Verbundstrang behält bis hier hin seinen rechteckigen flachen Querschnitt. In einer Baueinheit mit der Besäumungseinrichtung 4, folgt die Profiliereinrichtung 6, in der erfindungsgemäß der Verbundstrang insbesondere an den Kanten profiliert wird, so dass der Verbundstrang keinen rechteckigen Querschnitt mehr aufweist. In dem Ausführungsbeispiel ist dazu ein Teilrundfräser 7 für die Kante 20 vorgesehen. Diese Profilierung erfolgt erfindungsgemäß deutlich bevor der Verbundstrang, der mit einer Temperatur T2 aus der Presse austritt, die Umgebungstemperatur T1 erreicht hat. Räumlich gesehen ist der Abstand zwischen Pressenaustritt 2a und Profiliereinrichtung zumindest unter 20 m entfernt und liegt in jedem Fall vor einer Aufteilungssäge, hier in Form einer Diagonalsäge 11. Während der Profilierung kann der Verbundstrang sogar noch so warm sein, dass er sogar oberhalb der der gemittelten Temperatur zwischen der Temperatur am Austritt T2 aus der kontinuierlichen Presse 2a und der Umgebungstemperatur T1 liegt.The end of a
Der profilierte Verbundstrang wird über einen Überbrückungsförderer 8 zu einer Beschichtungseinrichtung 9 transportiert. In dem Ausführungsbeispiel erkennt man insbesondere unter Betrachtung der
Als Beschichtungsmaterial sind Folien oder (harzgetränktes) Papier üblich und einsetzbar. In dem dargestellten Ausführungsbeispiel gemäß der
Es folgt eine Endbehandlungseinrichtung für die Beschichtung 10 in der beispielsweise eine breitere obere Beschichtungsbahn 18a um eine beispielsweise abgerundete Kante des Verbundstranges umgelenkt und das Ende auf der Unterseite des Verbundstranges angeklebt wird, und zwar beispielsweise überlappend mit dem unteren Beschichtungsmaterial 18b. Man sieht eine solche Ausführung häufig bei einfachen Büroschreibtischen, wo die vordere Kante auf diese Weise erzeugt wird. Dies geschieht gemäß der Erfindung jedoch zum ersten Mal in einem kontinuierlichen Verfahren vor dem Schnitt in einzelne Platten an der Diagonalsäge 11.This is followed by a finishing device for the
Eine solche (in der Regel Kreis-)Säge fährt unter einem Winkel über den fortlaufenden Verbundstrang, um dadurch einen zur Vorschubrichtung rechtwinkeligen Schnitt zu erzielen.Such a (usually circular) saw runs at an angle over the continuous composite strand in order to thereby achieve a right-angled cut to the feed direction.
Verbundstrang 16 verklebt wird. Dabei wird das obere Beschichtungspapier 18a in Endbehandlungseinrichtung für Beschichtungen 10 um die gefräste Kante 20 bis auf die Unterseite des Verbundstranges 16 herumgeführt und auf der Unterseite überlappend mit dem unteren Beschichtungspapier 18b. Die Kante 20 selbst wurde mit einem Fräser 7, der geeignet ist, die gewünschten Rundungen 17 und Abschrägungen zu erzeugen, zuvor in der Profilierungseinrichtung 6 erstellt.
Die Profilierung muss allerdings - wie
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DE2357051A1 (en) * | 1973-11-15 | 1975-05-28 | Klessmann Ima Norte Maschfab | Finishing laminated or veneered plywood sheets or chipboards - by rounding off edges with a milling tool and attaching laminate foil or veneer to edges |
WO2004089585A2 (en) * | 2003-04-07 | 2004-10-21 | Fritz Egger Gmbh & Co. | Chipboard and method for the production thereof |
DE102011015195A1 (en) * | 2011-03-25 | 2012-09-27 | Fritz Egger Gmbh & Co. Og | Method and device for edging wood-based panels and wood-based panels |
DE102015107376A1 (en) | 2015-05-11 | 2016-11-17 | Dieffenbacher Maschinenfabrik Gmbh, Zaisenhausen | Apparatus and method for cooling material plates |
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US3577936A (en) * | 1969-01-10 | 1971-05-11 | William M Emery | Stool or leg rest |
NZ524934A (en) * | 2000-10-06 | 2004-02-27 | Mitek Holdings Inc | System for forming timbers with rounded ends |
CN109500976B (en) * | 2018-11-30 | 2021-06-22 | 大亚木业(江苏)有限公司 | Production process of high-strength low-formaldehyde shaving board |
BE1026957B1 (en) * | 2019-01-09 | 2020-08-14 | Ivc Bvba | Method of manufacturing a floor or wall panel |
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DE2357051A1 (en) * | 1973-11-15 | 1975-05-28 | Klessmann Ima Norte Maschfab | Finishing laminated or veneered plywood sheets or chipboards - by rounding off edges with a milling tool and attaching laminate foil or veneer to edges |
WO2004089585A2 (en) * | 2003-04-07 | 2004-10-21 | Fritz Egger Gmbh & Co. | Chipboard and method for the production thereof |
DE102011015195A1 (en) * | 2011-03-25 | 2012-09-27 | Fritz Egger Gmbh & Co. Og | Method and device for edging wood-based panels and wood-based panels |
DE102015107376A1 (en) | 2015-05-11 | 2016-11-17 | Dieffenbacher Maschinenfabrik Gmbh, Zaisenhausen | Apparatus and method for cooling material plates |
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