EP1798177B1 - Method and system for the position control of webs and corrugated cardboard with unfinished edges - Google Patents

Method and system for the position control of webs and corrugated cardboard with unfinished edges Download PDF

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Publication number
EP1798177B1
EP1798177B1 EP06023445A EP06023445A EP1798177B1 EP 1798177 B1 EP1798177 B1 EP 1798177B1 EP 06023445 A EP06023445 A EP 06023445A EP 06023445 A EP06023445 A EP 06023445A EP 1798177 B1 EP1798177 B1 EP 1798177B1
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EP
European Patent Office
Prior art keywords
web
webs
control according
position control
detection means
Prior art date
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Application number
EP06023445A
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German (de)
French (fr)
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EP1798177A2 (en
EP1798177A3 (en
Inventor
Thomas Ernst
Harald LÖFFLER
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Texmag GmbH Vertriebsgesellschaft
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Texmag GmbH Vertriebsgesellschaft
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Publication of EP1798177A3 publication Critical patent/EP1798177A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/0204—Sensing transverse register of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2831—Control
    • B31F1/2836—Guiding, e.g. edge alignment; Tensioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/032—Controlling transverse register of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/1882—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web

Definitions

  • the invention relates to a method and a system for position control of one or more webs, in particular paper-like or paperboard-like webs, which is preferably used in the production of corrugated board and corrugated board having a natural edge.
  • Fig. 1 From the prior art plants for the production of corrugated cardboard are known, the basic structure in Fig. 1 is shown.
  • Such a system comprises one or more unilateral groups in which a smooth and a corrugated web are joined together.
  • the so assembled webs are called one-sided webs.
  • the web When merging and laminating the one-sided webs and a cover sheet are merged into a single web and laminated. After lamination, the web passes through a heating and traction area. Here, the web is dried by the introduction of heat.
  • the corrugated board web is trimmed at the edges and further cut into desired formats as required and transported to a warehouse.
  • a device for detecting and / or controlling the edge position of paper webs in corrugator machines is known from DE 34 19 524 A1 known.
  • Other devices are out US 4,288,273 and US 4,392,910 known.
  • the present invention is therefore based on the object to improve the manufacturing accuracy.
  • this object is achieved by a method, a system and a corrugated cardboard according to the independent claims of the invention.
  • Advantageous embodiments are described in the dependent claims.
  • a method for position control of one or more webs is provided, in particular paper-like or paperboard-like webs.
  • Webs may preferably be understood here as paper or paperboard webs but may also be used, for example. Fabric panels, sheets of plastic and sheets of metal.
  • a web may consist of one or more layers of the same or different materials.
  • the method or the system according to the invention can be adapted for those types of webs which occur in the production of corrugated board.
  • the term unilateral web refers to a web consisting of two layers of material, one smooth and the other wavy.
  • the invention in one aspect, is concerned with optimizing the control of webs. Both in the production of a one-sided path, as well as in the merging of several one-sided tracks with a cover sheet, the best possible position control is desirable. The more accurately the webs can be positioned during assembly, especially relative to each other, the less scrap is generated.
  • the invention detects first position information for one or more webs downstream of one or more position-influencing devices by first position-detecting means. Then, control of the web layer (s) is performed by using the downstream detected first attitude information by the attitude control device.
  • the position of a web is used as a reference for controlling the other webs and a respective predetermined size indicates the desired relative position of the respective other web to the one web.
  • the web center and / or one or both web edges can serve in the determination of the web layer.
  • the web center is used to determine the web position and this aligned relative to the machine center.
  • second position information for one or more tracks in the area of the position-influencing devices can be detected by second position detection means. This allows even more precise position control, as there is information about the location where regulation takes place and the location that can be influenced by the regulation. The dynamics of the web can thus be taken into account for its position control.
  • the second position information in particular its change, can be used to control the position-influencing devices of one or more of the remaining tracks, in particular in order to reduce positional shifts of the tracks relative to each other.
  • This allows not only a web to be controlled to a desired position without regard to the other webs, but also webs to be aligned with each other.
  • the incorporation of the data obtained downstream can be dispensed with, as a result of which it is possible to realize a more cost-effective, albeit perhaps somewhat inaccurate regulation of the reference trajectory.
  • the relative position of the webs to each other of outstanding importance.
  • the second position information relates to the cover sheet to which the layers of the one or more other webs are regulated.
  • the control can take into account the web speed and the distance that the web to be controlled has to cover between the position-influencing device and the position-determining device.
  • the dead time can be incorporated into the control, whereby the control can be significantly improved in their accuracy.
  • the detection of the first position information by first position detection means can be carried out in the region before the lamination, but behind a bridge, in particular in the region of the preheater or of the gluing unit or directly before the lamination.
  • the position detection thus takes place behind the bridge on which the position-influencing means are arranged.
  • position information downstream is detected only for one lane or for several lanes. The same applies to the regulation of the one or more position-influencing devices.
  • a lane may be controlled either, or optionally, by information obtained downstream thereof, or information from one or more other lanes.
  • the detection of the first position information by first position detection means in the region of the preheater and the detection of third position information by third position detection means in the region of the gluing unit can be undertaken.
  • This information is available on at least two positions of one or more tracks, so that the dynamics of the system can be better taken into account. Consequently, both the first position information and the third position information can be used to control the position-influencing devices.
  • the position-influencing devices are arranged upstream of the region of the preheater, in particular on the bridge.
  • first position detection means are arranged in the region of the merger of two material layers, in particular in the region of a corrugating roller. Then, the position-influencing means or are preferably arranged upstream of a material layer heating and / or material layer moistening.
  • the position of the two layers of material can be optimized for one another, in particular, that they are located centrally above one another or that the edges of one side lie one above the other. This in turn is important for working with natural edge.
  • the control of the web layers preferably controls the position-influencing devices in such a way that the web layers lie flush over one another on one side, in particular in such a way that this side no longer has to be trimmed.
  • optical sensors For position sensing means, optical sensors, cameras, CCD cameras, ultrasonic devices, or piezoelectric elements that work with ultrasound may be used.
  • the invention is used in a corrugated papermaking plant, e.g. in corrugated cardboard plants with one to five one-sided groups.
  • the web width of at least one web is measured at a plurality of positions in the course of the corrugated board production.
  • a position detection means or a separate width measuring device can be used, depending on the respective measuring arrangement.
  • the moisture of the web can be measured.
  • the information obtained Width and humidity are used, for example, to determine a shrinkage factor, ie the ratio of one width to another width, for a specific production section or for the overall process. This information can be used to control humidification for greater process stability.
  • conclusions can be drawn about the determined shrinkage factors on the quality of the base material used.
  • a first web width and / or a first web moisture are measured after unwinding from a supply roll. At this point, the material still has its original width and moisture, it has not been moistened or connected to another track. Thus, the value determined here is used as a reference for the determination of a total shrinkage factor. Since it is possible to measure for each supply roll at such a location, it is advantageous to use the mean value of the widths or moistures thus measured.
  • a second web width and / or a second web moisture can be measured, and in particular the first web widths and second web widths can be used to assess the accuracy of the joining.
  • a web width and / or a web moisture can be measured prior to laminating and / or directly after laminating in front of the heating and drawing section and / or before the first trimming of the web. From this it is possible to determine, in sections, factors which can be used for the control of respective individual processes, such as wetting, drying or heating. From the measurement before the first trimming in combination with the measurements after unwinding, it is possible to calculate factors for the entire process, such as the shrinkage factor of the entire system.
  • the web widths prior to lamination and the web width prior to the first trimming of the web are used to assess the accuracy of the assembly and / or overlay.
  • Another aspect of the invention relates to a Georgia-to-vehicle system having a system shown above, inventive system.
  • the plant for the production of corrugated board may further comprise one or more unilateral groups and / or a heating and traction area and / or a finishing.
  • inventive principles can not only be used for the position control, but they can be used in an analogous manner for the web tension control. All aspects disclosed for attitude control in this specification or claims may be applied to web tension control.
  • the position detection means are replaced by tension detecting means, in particular measuring rollers, or adjusted so that they can detect a web tension.
  • the attitude control devices are replaced or adjusted to affect web tension.
  • the invention detects first web tension information for one or more webs downstream of one or more web tension influencing devices by first web tension detection means. Then, control of the web tension (s) using the downstream detected first web tension information is made by the web tension influencing device.
  • FIG. 2 shows a schematic representation of a one-sided group.
  • a corrugated board manufacturing plant there may be one or more such unilateral groups. They are the same from their function and their basic structure.
  • the paper or paper-like starting material is located on supply rolls 1.
  • the supply rolls 1 are always arranged in pairs, wherein the material is unwound from one roll while the other roll is kept in reserve. If the material of a roll is exhausted, it is spliced at the point 2 on the other role, so that the supply of material does not break off. From there, the paper is passed into a first material store 3. Paper is stored here to compensate for the paper feed delay that occurs when splicing to a new roll. To regulate the memory contents in the memory 3, the deflection rollers on the right and left in the memory can be moved towards each other or removed from each other.
  • the paper is guided past a width and / or moisture detection means 10 to the position-influencing device 4.
  • the width and / or humidity detection means 10 detects the values of the paper web in its original state.
  • the paper is passed after the attitude control device 4 over rollers, where it is heated, in particular with rollers, which are fed from the inside with hot water vapor.
  • the paper is moistened on the way, so that it is more malleable and can be easier to connect two layers of paper later.
  • a position detection means 7 and a width and / or moisture detection means 11 are arranged.
  • the position detection means 7 detects the position of the two webs and / or their relative position to each other. This information can be used in various ways for the control of the Lübeein Wegungsvornchtungen 4. So she can e.g.
  • a web is controlled to a predetermined position, wherein the other web is aligned relative to this first web.
  • the web layers are regulated so that the edges of the two tracks on one side are exactly on top of each other.
  • a width and / or moisture detection means 11 is also arranged in the region of the corrugating roller 5.
  • the moistening of the respective web can be readjusted so that constant and controlled conditions prevail during gluing.
  • the generated unilateral web is conveyed to the bridge 8.
  • the so-called bridge stock 9 is arranged. He serves as a reserve for further production.
  • the bridge supply 9 serves as a reserve, so that the manufacturing process can continue at a speed of about 100 to 400 meters per minute.
  • the speed when producing the single-sided sheet is raised to an above-average value in order to replenish the bridge supply 9.
  • a position detection means and / or width and / or moisture detection means 12 is arranged.
  • further data for process monitoring and optimization are gained.
  • information about the bridge supply can be obtained at the same time here.
  • FIG. 3 shows a schematic representation of a merge, laminating and a heating and traction area.
  • the position-influencing devices 15, 16 regulate the position of the single-sided webs as well as the required web tension.
  • the cover layer is passed to the position control device 14 via a storage device.
  • a width and / or moisture detection means can be arranged in front of the position-influencing device 14 in order to also detect the width of the cover sheet or its moisture.
  • the webs are passed via a preheater 17 and a gluing unit 19 to the lamination 21, where the webs are joined together.
  • the most accurate positioning of the webs to each other is desirable. Only when the webs are all glued together flush on one side, you can work with natural edge. Alternatively, all tracks can be aligned centrally with each other. critical is, however, that the position of the webs at the location of the lamination 21 is of the utmost importance, with the last position-influencing devices 14, 15, 16 still being placed in front of the pre-heater 17. For structural reasons, these can not be brought closer to the lamination. The last position control option is thus a whole distance from the lamination 21.
  • the invention provides position detection means 18, 20, can be obtained by the information about the web layers in places that are much closer to the crucial laminating. It can be installed as needed only one of the position detection means 18, 20. Thus, e.g. only be measured after Glimtechnik 19 and not all tracks must be measured. The information obtained by the position detection means 18, 20 is used to control the attitude control devices 14, 15, 16.
  • Each lane may be viewed separately and controlled to a particular position, with the deviation from this value, as measured by a position sensing means 18, 20, being used as the target value for the control of the attitude controllers 14, 15, 16.
  • a web in particular the cover sheet, serve as a reference. Then the layers of the other webs are controlled relative to this.
  • the information obtained for the reference trajectory can be used to control the other trajectories to track them or to compensate for the dynamics of the reference trajectory.
  • position-influencing devices 4, 14, 15, 16 can themselves be equipped with position detection means.
  • the distance the track has to travel between attitude control device 4, 14, 15, 16 and measurement location and the web speed is taken into account.
  • damping can be set.
  • width and / or moisture detection means can be used for the position detection devices 18, 20 additionally or alternatively. In this way, the desired moisture of the webs can be ensured in the lamination 21. In addition, all widths before the lamination 21 can be measured.
  • the web After lamination 21, the web is dried in the heating and drawing area. Circulating belts pull the web through this area, while it is guided past heating elements. By introducing heat, the cardboard is deprived of moisture and dried.
  • FIG. 4 is a schematic representation of a final processing. Behind the heating and traction region 22, a further width and / or moisture detection means 23 is arranged. The measured moisture is used to control the heat energy to be applied in the heating and drawing area 22. The measured width is used to determine a shrinkage factor along with the width values measured after unwinding for the entire manufacturing process. This gives information about the quality of the raw material used. In addition, the value measured here can also be used to evaluate, and possibly improve, the positioning of the liner 21. Thus, the cardboard web should not be significantly wider than the single webs at the point of measurement after the heating and traction region 22 the lamination 21. Furthermore, the shrinkage factor of the heating and traction region 22 can be determined.
  • the web is forwarded to the first cropping 24.
  • the edges of the web are trimmed or trimmed.
  • the invention allows working with natural edge, in this case, the corrugated board must be trimmed only on one side.
  • the system according to the invention does not have to be operated with a natural edge.
  • the web is cut longitudinally and transversely to desired dimensions and passed into a warehouse, which on the right side of the FIG. 4 is shown schematically.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Making Paper Articles (AREA)

Abstract

The method involves detecting of position information for one or multiple webs downstream one or multiple position influence device (4) by a position detecting medium (7). The web position is controlled by using the position information downstream detected by the position influence device. Independent claims are also included for the following: (1) a cardboard is manufactured by using of a method (2) a system for the position control of webs, particularly of paper or cardboard webs (3) a plant for manufacturing of cardboard.

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft ein Verfahren und ein System zur Lageregelung einer oder mehrerer Bahnen, insbesondere von papierartigen oder pappeartigen Bahnen, das bevorzugt bei der Herstellung von Wellpappe verwendet wird und Wellpappe, die eine Naturkante aufweist.The invention relates to a method and a system for position control of one or more webs, in particular paper-like or paperboard-like webs, which is preferably used in the production of corrugated board and corrugated board having a natural edge.

Stand der TechnikState of the art

Aus dem Stand der Technik sind Anlagen zur Herstellung von Wellpappe bekannt, deren prinzipieller Aufbau in Fig. 1 dargestellt ist. Eine solche Anlage umfasst eine oder mehrere einseitige Gruppen, bei denen jeweils eine glatte und eine geriffelte Bahn zusammengefügt werden. Die so zusammengefügten Bahnen werden einseitige Bahnen genannt. Bei der Zusammenführung und Kaschierung werden die einseitigen Bahnen und eine Deckbahn zu einer einzigen Bahn zusammengeführt und kaschiert. Nach der Kaschierung durchläuft die Bahn einen Heiz- und Zugbereich. Hier wird die Bahn durch Einbringung von Hitze getrocknet. In der abschließenden Endverarbeitung wird die Wellpappenbahn an den Rändern beschnitten und je nach Bedarf weiter in gewünschte Formate geschnitten und in ein Lager transportiert.From the prior art plants for the production of corrugated cardboard are known, the basic structure in Fig. 1 is shown. Such a system comprises one or more unilateral groups in which a smooth and a corrugated web are joined together. The so assembled webs are called one-sided webs. When merging and laminating the one-sided webs and a cover sheet are merged into a single web and laminated. After lamination, the web passes through a heating and traction area. Here, the web is dried by the introduction of heat. In the final finishing process, the corrugated board web is trimmed at the edges and further cut into desired formats as required and transported to a warehouse.

Eine Vorrichtung zur Erfassung und/oder Steuerung der Kantenlage von Papierbahnen in Wellpappenmaschinen ist aus der DE 34 19 524 A1 bekannt. Weitere Vorrichtungen sind aus US 4,288,273 und US 4,392,910 bekannt.A device for detecting and / or controlling the edge position of paper webs in corrugator machines is known from DE 34 19 524 A1 known. Other devices are out US 4,288,273 and US 4,392,910 known.

Die Herstellung mit bekannten Anlagen bedingt, dass auf Grund von Ungenauigkeiten im Herstellungsprozess das eingesetzte Material nicht optimal ausgenutzt werden kann.The production with known systems requires that due to inaccuracies in the manufacturing process, the material used can not be optimally utilized.

Zusammenfassung der ErfindungSummary of the invention

Der vorliegenden Erfindung liegt folglich die Aufgabe zu Grunde, die Herstellungsgenauigkeit zu verbessern.The present invention is therefore based on the object to improve the manufacturing accuracy.

Erfindungsgemäß wird diese Aufgabe durch ein Verfahren, ein System und eine Wellpappe gemäß den unabhängigen Ansprüchen der Erfindung gelöst. Vorteilhafte Ausführungsformen werden in den abhängigen Ansprüchen beschrieben.According to the invention, this object is achieved by a method, a system and a corrugated cardboard according to the independent claims of the invention. Advantageous embodiments are described in the dependent claims.

Erfindungsgemäß wird ein Verfahren zur Lageregelung einer oder mehrerer Bahnen bereitgestellt, insbesondere von papierartigen oder pappeartigen Bahnen. Unter Bahnen können hier vorzugsweise Papier- oder Pappbahnen verstanden werden aber auch z.B. Stoffbahnen, Bahnen aus Kunststoff und Bahnen aus Metall. Eine Bahn kann aus einer oder mehreren Schichten der gleichen oder unterschiedlichen Materialien bestehen. Insbesondere kann das erfindungsgemäße Verfahren oder das erfindungsgemäße System für solche Arten von Bahnen angepasst werden, die bei der Herstellung von Wellpappe vorkommen. In diesem Zusammenhang bezeichnet der Begriff einseitige Bahn eine Bahn, die aus zwei Materialschichten besteht, wobei eine glatt und die andere gewellt ist.According to the invention, a method for position control of one or more webs is provided, in particular paper-like or paperboard-like webs. Webs may preferably be understood here as paper or paperboard webs but may also be used, for example. Fabric panels, sheets of plastic and sheets of metal. A web may consist of one or more layers of the same or different materials. In particular, the method or the system according to the invention can be adapted for those types of webs which occur in the production of corrugated board. In this context, the term unilateral web refers to a web consisting of two layers of material, one smooth and the other wavy.

Die Erfindung beschäftigt sich gemäß eines Aspekts mit der Optimierung der Regelung von Bahnen. Sowohl bei der Herstellung einer einseitigen Bahn, wie auch bei dem Zusammenführen mehrer einseitiger Bahnen mit einer Deckbahn, ist eine möglichst optimale Lageregelung wünschenswert. Je genauer die Bahnen beim Zusammenfügen positioniert werden können, insbesondere relativ zueinander, desto weniger Ausschuss wird erzeugt. Die Erfindung erfasst zu diesem Zweck erste Lageinformationen für eine oder mehrere Bahnen stromabwärts einer oder mehreren Lagebeeinflussungsvorrichtungen durch erste Lageerfassungsmittel. Dann wird eine Steuerung der Bahnlage(n) unter Verwendung der stromabwärts erfassten ersten Lageinformationen durch die Lagebeeinflussungsvorrichtung vorgenommen.The invention, in one aspect, is concerned with optimizing the control of webs. Both in the production of a one-sided path, as well as in the merging of several one-sided tracks with a cover sheet, the best possible position control is desirable. The more accurately the webs can be positioned during assembly, especially relative to each other, the less scrap is generated. For this purpose, the invention detects first position information for one or more webs downstream of one or more position-influencing devices by first position-detecting means. Then, control of the web layer (s) is performed by using the downstream detected first attitude information by the attitude control device.

Vorteilhafterweise wird die Lage einer Bahn als Bezugsgröße zur Regelung der anderen Bahnen verwendet und eine jeweils vorgegebene Größe gibt die gewünschte relative Lage der jeweiligen anderen Bahn zu der einen Bahn an. Bei der Bestimmung der Bahnlage kann die Bahnmitte und/oder eine oder beide Bahnkanten dienen. Bei vielen Anlagen wird zur Bestimmung der Bahnlage die Bahnmitte verwendet und diese relativ zur Maschinenmitte ausgerichtet.Advantageously, the position of a web is used as a reference for controlling the other webs and a respective predetermined size indicates the desired relative position of the respective other web to the one web. The web center and / or one or both web edges can serve in the determination of the web layer. In many systems, the web center is used to determine the web position and this aligned relative to the machine center.

Es können weiterhin zweite Lageinformationen für eine oder mehrere Bahnen im Bereich der Lagebeeinflussungsvorrichtungen durch zweite Lageerfassungsmittel erfasst werden. Hierdurch ist eine noch genauere Lageregelung möglich, da Informationen über den Ort vorliegen, an dem geregelt wird, und dem Ort, der durch die Regelung beeinflusst werden kann. Die Dynamik der Bahn kann somit für ihre Lageregelung berücksichtigt werden.Furthermore, second position information for one or more tracks in the area of the position-influencing devices can be detected by second position detection means. This allows even more precise position control, as there is information about the location where regulation takes place and the location that can be influenced by the regulation. The dynamics of the web can thus be taken into account for its position control.

Zudem kann die zweite Lageinformation, insbesondere ihre Änderung, zur Steuerung der Lagebeeinflussungsvorrichtungen einer oder mehrerer der übrigen Bahnen verwendet werden, insbesondere um Lageverschiebungen der Bahnen zueinander zu reduzieren. Dies ermöglicht, dass nicht nur eine Bahn ohne Berücksichtigung der anderen Bahnen auf eine gewünschte Position geregelt wird, sondern dass Bahnen zueinander ausgerichtet werden. Hieraus ergibt sich eine Reihe von Vorteilen. So kann z.B. bei einer Bahn, nämlich bei der Referenzbahn, auf die Einbeziehung der stromabwärts gewonnenen Daten verzichtet werden, wodurch eine kostengünstigere, wenn auch vielleicht etwas ungenauere Regelung der Referenzbahn realisiert werden kann. Weiterhin ist z.B. beim Kaschieren von mehreren Bahnen die relative Lage der Bahnen zueinander von herausragender Bedeutung. Wenn alle Bahnen so kaschiert werden, dass sie auf einer Seite bündig übereinander liegen, braucht diese Seite später nicht mehr beschnitten oder getrimmt zu werden, und Material kann eingespart werden. Eine solche Herstellung, die erst durch die vorliegende Erfindung realisiert werden kann, wird als Naturkante bezeichnet. Für die Herstellung ist eine überschaubare Positionsschwankung aller Bahnen verträglich, solange die Bahnen nicht zueinander schwanken. In Abwesenheit einer nennenswerten relativen Schwankung kann weiter mit Naturkante gearbeitet werden. Bevorzugt bezieht sich die zweite Lageinformation auf die Deckbahn, zu der die Lagen der einen oder mehreren anderen Bahnen geregelt werden.In addition, the second position information, in particular its change, can be used to control the position-influencing devices of one or more of the remaining tracks, in particular in order to reduce positional shifts of the tracks relative to each other. This allows not only a web to be controlled to a desired position without regard to the other webs, but also webs to be aligned with each other. This results in a number of advantages. Thus, for example, in the case of a trajectory, namely the reference trajectory, the incorporation of the data obtained downstream can be dispensed with, as a result of which it is possible to realize a more cost-effective, albeit perhaps somewhat inaccurate regulation of the reference trajectory. Furthermore, for example, when laminating several webs, the relative position of the webs to each other of outstanding importance. If all the webs are laminated in such a way that they lie flush on one side, then this page no longer needs to be trimmed or trimmed, and material can be saved. Such a production, which can be realized only by the present invention, is referred to as natural edge. For the production is a manageable positional fluctuation of all Tracks compatible, as long as the tracks do not fluctuate. In the absence of a significant relative fluctuation can continue to work with natural edge. Preferably, the second position information relates to the cover sheet to which the layers of the one or more other webs are regulated.

Die Regelung kann die Bahngeschwindigkeit und die Strecke, die die zu regelnde Bahn zwischen Lagebeeinflussungsvorrichtung und Lageerfassungsmittel zurückzulegen hat, berücksichtigen. Somit kann die Totzeit mit in die Regelung einfließen, wodurch die Regelung wesentlich in ihrer Genauigkeit verbessert werden kann.The control can take into account the web speed and the distance that the web to be controlled has to cover between the position-influencing device and the position-determining device. Thus, the dead time can be incorporated into the control, whereby the control can be significantly improved in their accuracy.

Das Erfassen von den ersten Lageinformationen durch erste Lageerfassungsmittel kann im Bereich vor der Kaschierung, jedoch hinter einer Brücke, insbesondere im Bereich des Vorheizers oder des Leimwerks oder direkt vor der Kaschierung, vorgenommen werden. Die Lageerfassung findet also hinter der Brücke statt, auf der die Lagebeeinflussungsmittel angeordnet sind. Je nach Bedarf wird nur für eine Bahn Lageinformation stromabwärts erfasst oder für mehrere Bahnen. Selbiges gilt für die Regelung der einen oder mehreren Lagebeeinflussungsvorrichtungen. Eine Bahn kann entweder oder wahlweise von einer über sie stromabwärts gewonnenen Information geregelt werden oder von einer Information von einer oder mehreren anderen Bahnen.The detection of the first position information by first position detection means can be carried out in the region before the lamination, but behind a bridge, in particular in the region of the preheater or of the gluing unit or directly before the lamination. The position detection thus takes place behind the bridge on which the position-influencing means are arranged. Depending on requirements, position information downstream is detected only for one lane or for several lanes. The same applies to the regulation of the one or more position-influencing devices. A lane may be controlled either, or optionally, by information obtained downstream thereof, or information from one or more other lanes.

Alternativ kann das Erfassen von den ersten Lageinformationen durch erste Lageerfassungsmittel im Bereich des Vorheizers und das Erfassen von dritten Lageinformationen durch dritte Lageerfassungsmittel im Bereich des Leimwerks vorgenommen werden. Hiermit liegen Informationen über mindestens zwei Positionen einer oder mehrer Bahnen vor, so dass die Dynamik des Systems besser berücksichtigt werden kann. Es können folglich sowohl die ersten Lageinformationen als auch die dritten Lageinformationen zur Regelung der Lagebeeinflussungsvorrichtungen verwendet werden.Alternatively, the detection of the first position information by first position detection means in the region of the preheater and the detection of third position information by third position detection means in the region of the gluing unit can be undertaken. This information is available on at least two positions of one or more tracks, so that the dynamics of the system can be better taken into account. Consequently, both the first position information and the third position information can be used to control the position-influencing devices.

Die Lagebeeinflussungsvorrichtungen sind stromaufwärts des Bereichs des Vorheizers, insbesondere auf der Brücke, angeordnet.The position-influencing devices are arranged upstream of the region of the preheater, in particular on the bridge.

Alternativ oder zusätzlich sind erste Lageerfassungsmittel im Bereich der Zusammenleitung von zwei Materiallagen angeordnet, insbesondere im Bereich einer Riffelwalze. Dann sind bevorzugt das oder die Lagebeeinflussungsmittel stromaufwärts einer Materiallagenheizung und/oder Materiallagenbefeuchtung angeordnet.Alternatively or additionally, first position detection means are arranged in the region of the merger of two material layers, in particular in the region of a corrugating roller. Then, the position-influencing means or are preferably arranged upstream of a material layer heating and / or material layer moistening.

Durch Steuerung einer Materiallage in Abhängigkeit von der ersten Lageinformation kann die Lage der beiden Materiallagen zueinander optimiert werden, insbesondere, dass sie mittig übereinander liegen oder die Kanten einer Seite übereinander liegen. Dies ist wiederum für das Arbeiten mit Naturkante von Bedeutung.By controlling a material layer as a function of the first position information, the position of the two layers of material can be optimized for one another, in particular, that they are located centrally above one another or that the edges of one side lie one above the other. This in turn is important for working with natural edge.

Bevorzugt steuert die Steuerung der Bahnlagen die Lagebeeinflussungsvorrichtungen so, dass die Bahnlagen an einer Seite bündig übereinander liegen, insbesondere so, dass diese Seite nicht mehr beschnitten werden muss.The control of the web layers preferably controls the position-influencing devices in such a way that the web layers lie flush over one another on one side, in particular in such a way that this side no longer has to be trimmed.

Für Lageerfassungsmittel können optische Sensoren, Kameras, CCD-Kameras, Ultraschallgeräte oder piezoelektrische Elemente, die mit Ultraschall arbeiten, verwendet werden. Insbesondere wird die Erfindung bei einer Anlage zur Wellpappenherstellung eingesetzt, z.B. bei Wellpappenanlagen mit ein bis fünf einseitigen Gruppen.For position sensing means, optical sensors, cameras, CCD cameras, ultrasonic devices, or piezoelectric elements that work with ultrasound may be used. In particular, the invention is used in a corrugated papermaking plant, e.g. in corrugated cardboard plants with one to five one-sided groups.

Gemäß eines zweiten Aspekts der Erfindung wird an einer Mehrzahl von Positionen im Verlauf der Wellpappenherstellung die Bahnbreite mindestens einer Bahn gemessen. Für die Messung der Bahnbreite kann in Abhängigkeit von der jeweiligen Messanordnung ein Lageerfassungsmittel oder eine gesonderte Breitenmessvorrichtung verwendet werden. Alternativ oder zusätzlich zur Breitenmessung kann die Feuchtigkeit der Bahn gemessen werden. Die gewonnenen Informationen über Breite und Feuchtigkeit dienen z.B. zur Bestimmung eines Schrumpffaktors, also dem Verhältnis von einer Breite zu einer anderen Breite, für einen bestimmten Herstellungsabschnitt oder für den Gesamtprozess. Diese Informationen können für die Regelung der Befeuchtung verwendet werden, um eine höhere Prozessstabilität zu erzielen. Weiterhin kann über die ermittelten Schrumpfungsfaktoren zurückgeschlossen werden auf die Qualität des verwendeten Grundmaterials.According to a second aspect of the invention, the web width of at least one web is measured at a plurality of positions in the course of the corrugated board production. For the measurement of the web width, a position detection means or a separate width measuring device can be used, depending on the respective measuring arrangement. Alternatively or in addition to the width measurement, the moisture of the web can be measured. The information obtained Width and humidity are used, for example, to determine a shrinkage factor, ie the ratio of one width to another width, for a specific production section or for the overall process. This information can be used to control humidification for greater process stability. Furthermore, conclusions can be drawn about the determined shrinkage factors on the quality of the base material used.

Bevorzugt werden eine erste Bahnbreite und/oder eine erste Bahnfeuchtigkeit nach dem Abwickeln von einer Vorratsrolle gemessen. An dieser Stelle weist das Material noch seine ursprüngliche Breite und Feuchtigkeit auf, es wurde noch nicht befeuchtet oder mit einer anderen Bahn verbunden. Somit wird der hier ermittelte Wert als Bezugswert für die Ermittlung eines Gesamtschrumpffaktors verwendet. Da für jede Vorratsrolle an einer solchen Stelle gemessen werden kann, ist es vorteilhaft, den Mittelwert der so gemessenen Breiten bzw. Feuchten zu verwenden.Preferably, a first web width and / or a first web moisture are measured after unwinding from a supply roll. At this point, the material still has its original width and moisture, it has not been moistened or connected to another track. Thus, the value determined here is used as a reference for the determination of a total shrinkage factor. Since it is possible to measure for each supply roll at such a location, it is advantageous to use the mean value of the widths or moistures thus measured.

Weiterhin kann nach Erzeugung einer einseitigen Wellpappe eine zweite Bahnbreite und/oder eine zweite Bahnfeuchtigkeit gemessen werden und insbesondere die ersten Bahnbreiten und zweite Bahnbereite zur Beurteilung der Genauigkeit des Zusammenfügens verwendet werden.Furthermore, after producing a single-faced corrugated cardboard, a second web width and / or a second web moisture can be measured, and in particular the first web widths and second web widths can be used to assess the accuracy of the joining.

Zudem kann vor dem Kaschieren und/oder direkt nach dem Kaschieren vor der Heiz- und Zugpartie und/oder vor dem ersten Beschneiden der Bahn eine Bahnbreite und/oder eine Bahnfeuchtigkeit gemessen werden. Hieraus lassen sich abschnittsweise Faktoren bestimmen, die für die Steuerung von jeweiligen Einzelprozessen, wie Befeuchten, Trocknen oder Erhitzen verwendet werden können. Aus der Messung vor dem ersten Beschneiden in Kombination mit den Messungen nach dem Abwickeln lassen sich Faktoren für den Gesamtprozess berechnen, so z.B. der Schrumpffaktor der gesamten Anlage.In addition, a web width and / or a web moisture can be measured prior to laminating and / or directly after laminating in front of the heating and drawing section and / or before the first trimming of the web. From this it is possible to determine, in sections, factors which can be used for the control of respective individual processes, such as wetting, drying or heating. From the measurement before the first trimming in combination with the measurements after unwinding, it is possible to calculate factors for the entire process, such as the shrinkage factor of the entire system.

Weiterhin werden die Bahnbreiten vor dem Kaschieren und die Bahnbreite vor dem ersten Beschneiden der Bahn zur Beurteilung der Genauigkeit des Zusammenfügens und/oder der Überdeckung verwendet.Furthermore, the web widths prior to lamination and the web width prior to the first trimming of the web are used to assess the accuracy of the assembly and / or overlay.

Ein weiterer Aspekt der Erfindung betrifft eine Zusammenführungs- und Kaschierstelle einer Wellpappenanlage, die ein oben dargestelltes, erfindungsgemäßes System aufweist. Die Anlage zur Herstellung von Wellpappe kann weiter eine oder mehrere einseitige Gruppen und/oder einen Heiz- und Zugbereich und/oder eine Endverarbeitung aufweisen.Another aspect of the invention relates to a Zusammenführungs- and laminating a corrugator system having a system shown above, inventive system. The plant for the production of corrugated board may further comprise one or more unilateral groups and / or a heating and traction area and / or a finishing.

Die erfindungsgemäßen Prinzipien können nicht nur für die Lageregelung verwendet werden, sondern sie können in analoger Weise auch für die Bahnspannungsregelung verwendet werden. Alle Aspekte, die zur Lageregelung in dieser Beschreibung oder den Ansprüchen offenbart sind, können auf die Bahnspannungsregelung übertragen werden.The inventive principles can not only be used for the position control, but they can be used in an analogous manner for the web tension control. All aspects disclosed for attitude control in this specification or claims may be applied to web tension control.

Für die Bahnspannungsregelung werden die Lageerfassungsmittel durch Spannungserfassungsmittel, insbesondere Messwalzen, ersetzt oder so angepasst, dass sie eine Bahnspannung erfassen können. Die Lagebeeinflussungsvorrichtungen werden ersetzt oder so angepasst, dass sie Bahnspannungen beeinflussen können.For the web tension control, the position detection means are replaced by tension detecting means, in particular measuring rollers, or adjusted so that they can detect a web tension. The attitude control devices are replaced or adjusted to affect web tension.

Sowohl bei der Herstellung einer einseitigen Bahn, wie auch bei dem Zusammenführen mehrer einseitiger Bahnen mit einer Deckbahn, ist eine möglichst optimale Bahnspannungsregelung wünschenswert. Die Erfindung erfasst zu diesem Zweck erste Bahnspannungsinformationen für eine oder mehrere Bahnen stromabwärts einer oder mehreren Bahnspannungsbeeinflussungsvorrichtungen durch erste Bahnspannungserfassungsmittel. Dann wird eine Steuerung der Bahnspannung(en) unter Verwendung der stromabwärts erfassten ersten Bahnspannungsinformationen durch die Bahnspannungsbeeinflussungsvorrichtung vorgenommen.Both in the production of a single-sided web, as well as in the merging of several one-sided webs with a cover sheet, the best possible web tension control is desirable. For this purpose, the invention detects first web tension information for one or more webs downstream of one or more web tension influencing devices by first web tension detection means. Then, control of the web tension (s) using the downstream detected first web tension information is made by the web tension influencing device.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere Aspekte und Vorteile der vorliegenden Erfindung werden aus der detaillierten Beschreibung der beigefügten Zeichnungen deutlich werden.

Fig. 1
ist eine schematische Übersichtsdarstellung einer Anlage zur Herstellung von Wellpappe;
Fig. 2
ist eine schematische Darstellung einer einseitigen Gruppe einer Anlage zur Herstellung von Wellpappe gemäß der vorliegenden Erfindung;
Fig. 3
ist eine schematische Darstellung einer Zusammenführung, Kaschierstelle und eines Heiz- und Zugbereichs gemäß der vorliegenden Erfindung; und
Fig. 4
ist eine schematische Darstellung einer Endverarbeitung gemäß der vorliegenden Erfindung.
Other aspects and advantages of the present invention will become apparent from the detailed description of the accompanying drawings.
Fig. 1
is a schematic overview of a plant for the production of corrugated board;
Fig. 2
is a schematic representation of a one-sided group of a plant for the production of corrugated board according to the present invention;
Fig. 3
is a schematic representation of a merging, laminating and a heating and traction area according to the present invention; and
Fig. 4
is a schematic representation of a finishing according to the present invention.

Detaillierte Beschreibung der ZeichnungenDetailed description of the drawings

Figur 2 zeigt eine schematische Darstellung einer einseitigen Gruppe. In einer Anlage zur Herstellung von Wellpappe kann es eine oder mehrere derartige einseitige Gruppen geben. Sie sind von ihrer Funktion und ihrem prinzipiellen Aufbau gleich. FIG. 2 shows a schematic representation of a one-sided group. In a corrugated board manufacturing plant there may be one or more such unilateral groups. They are the same from their function and their basic structure.

Das Papier oder papierartige Ausgangsmaterial befindet sich auf Vorratsrollen 1. Die Vorratsrollen 1 sind stets paarweise angeordnet, wobei das Material von einer Rolle abgewickelt wird, während die andere Rolle als Ersatz bereitgehalten wird. Ist das Material einer Rolle erschöpft, so wird an der Stelle 2 auf die andere Rolle gespleißt, so dass die Materialzufuhr nicht abreißt. Von da aus wird das Papier in einen ersten Materialspeicher 3 geleitet. Hier wird Papier gespeichert, um die Verzögerung der Papierzufuhr, die beim Spleißen auf eine neue Rolle entsteht, zu kompensieren. Zur Regelung des Speicherinhalts im Speicher 3 können die Umlenkrollen rechts und links im Speicher aufeinander zu bewegt oder voneinander entfernt werden.The paper or paper-like starting material is located on supply rolls 1. The supply rolls 1 are always arranged in pairs, wherein the material is unwound from one roll while the other roll is kept in reserve. If the material of a roll is exhausted, it is spliced at the point 2 on the other role, so that the supply of material does not break off. From there, the paper is passed into a first material store 3. Paper is stored here to compensate for the paper feed delay that occurs when splicing to a new roll. To regulate the memory contents in the memory 3, the deflection rollers on the right and left in the memory can be moved towards each other or removed from each other.

Vom ersten Speicher 3 wird das Papier an einem Breiten- und/oder Feuchtigkeitserfassungsmittel 10 vorbei zu der Lagebeeinflussungsvorrichtung 4 geleitet. Das Breiten- und/oder Feuchtigkeitserfassungsmittel 10 erfasst die Werte der Papierbahn in ihrem ursprünglichen Zustand. Das Papier wird nach der Lagebeeinflussungsvorrichtung 4 über Walzen geleitet, wo es erhitzt wird, insbesondere mit Walzen, die von innen mit heißem Wasserdampf gespeist werden. Zudem wird das Papier auf dem Weg angefeuchtet, damit es besser verformbar ist und sich zwei Papierlagen später leichter verbinden lassen.From the first memory 3, the paper is guided past a width and / or moisture detection means 10 to the position-influencing device 4. The width and / or humidity detection means 10 detects the values of the paper web in its original state. The paper is passed after the attitude control device 4 over rollers, where it is heated, in particular with rollers, which are fed from the inside with hot water vapor. In addition, the paper is moistened on the way, so that it is more malleable and can be easier to connect two layers of paper later.

Dann wird die Bahn, die von einer Seite kommt, über eine Riffelwalze 5 geführt, wo sie in eine wellige Form gezwungen wird. Die Leimvorrichtung 6 trägt Leim auf diese Bahn auf. Von der anderen Seite kommt eine zweite Bahn, die dann mit der gewellten Bahn zu einer einseitigen Bahn verleimt wird. Im Bereich der Verleimung der beiden Bahnen ist ein Lageerfassungsmittel 7 sowie ein Breiten- und/oder Feuchtigkeitserfassungsmittel 11 angeordnet. Das Lageerfassungsmittel 7 erfasst die Lage der beiden Bahnen und/oder deren relative Lage zueinander. Diese Information kann auf verschiedene Weisen für die Regelung der Lagebeeinflussungsvornchtungen 4 verwendet werden. So kann sie z.B. verwendet werden, um eine oder beide Bahnen auf eine genaue Lage bei der Zusammenführung zu regeln, oder um eine Bahn so zu regeln, dass sie genau an der anderen ausgerichtet wird. Bevorzugt wird eine Bahn auf eine vorgegebene Lage geregelt, wobei die andere Bahn relativ zu dieser ersten Bahn ausgerichtet wird. Zum Arbeiten mit Naturkante, dass heißt, eine Seite muss nicht beschnitten oder getrimmt werden, werden die Bahnlagen so geregelt, dass die Kanten der beiden Bahnen auf einer Seite genau übereinander liegen.Then, the web coming from one side is passed over a corrugating roll 5 where it is forced into a wavy shape. The sizing device 6 applies glue to this web. From the other side comes a second track, which is then glued with the corrugated web to a one-sided path. In the region of the gluing of the two webs, a position detection means 7 and a width and / or moisture detection means 11 are arranged. The position detection means 7 detects the position of the two webs and / or their relative position to each other. This information can be used in various ways for the control of the Lagebeeinflussungsvornchtungen 4. So she can e.g. can be used to regulate one or both tracks to an exact location at the merge, or to control one track to be precisely aligned with the other. Preferably, a web is controlled to a predetermined position, wherein the other web is aligned relative to this first web. To work with natural edge, that is, a page does not have to be trimmed or trimmed, the web layers are regulated so that the edges of the two tracks on one side are exactly on top of each other.

Für die Feuchtigkeitsregelung ist im Bereich der Riffelwalze 5 ebenfalls ein Breiten- und/oder Feuchtigkeitserfassungsmittel 11 angeordnet. Hierdurch lässt sich die Befeuchtung der jeweiligen Bahn so nachregeln, dass beim Verleimen konstante und kontrollierte Bedingungen herrschen.For moisture control, a width and / or moisture detection means 11 is also arranged in the region of the corrugating roller 5. As a result, the moistening of the respective web can be readjusted so that constant and controlled conditions prevail during gluing.

Die erzeugte einseitige Bahn wird auf die Brücke 8 befördert. Hier ist ein zweiter Vorrat, der so genannte Brückenvorrat 9 angeordnet. Er dient als Reserve für die weitere Herstellung. Beim Umspleißen von einer Vorratsrolle 1 auf eine andere wird üblicherweise die Herstellung der einseitigen Bahn verlangsamt, um ein sicheres und somit langsameres Anspleißen zu erlauben. Für diesen Zeitraum dient der Brückenvorrat 9 als Reserve, damit der Herstellungsprozess mit einer Geschwindigkeit von ca. 100 bis 400 Metern pro Minute weiterlaufen kann. Nach dem Wechsel auf eine neue Vorratsrolle 1 wird die Geschwindigkeit beim Erzeugen der einseitigen Bahn auf einen überdurchschnittlichen Wert angehoben, um den Brückenvorrat 9 wieder aufzufüllen.The generated unilateral web is conveyed to the bridge 8. Here is a second supply, the so-called bridge stock 9 is arranged. He serves as a reserve for further production. When splicing from one supply roll 1 to another, usually the production of the single-sided web is slowed down to allow a secure and thus slower splicing. For this period, the bridge supply 9 serves as a reserve, so that the manufacturing process can continue at a speed of about 100 to 400 meters per minute. After changing to a new supply roll 1, the speed when producing the single-sided sheet is raised to an above-average value in order to replenish the bridge supply 9.

Am Ende des Brückenvorrats 9 ist ein Lageerfassungsmittel und/oder Breiten- und/oder Feuchtigkeitserfassungsmittel 12 angeordnet. Hier werden weitere Daten für die Prozessüberwachung und Optimierung gewonnen. Insbesondere kann hier gleichzeitig Information über den Brückenvorrat gewonnen werden.At the end of the bridge supply 9, a position detection means and / or width and / or moisture detection means 12 is arranged. Here, further data for process monitoring and optimization are gained. In particular, information about the bridge supply can be obtained at the same time here.

Figur 3 zeigt eine schematische Darstellung einer Zusammenführung, Kaschierstelle und eines Heiz- und Zugbereichs. Hierhin werden die eine oder mehrere einseitige Bahnen geleitet. Die Lagebeeinflussungsvorrichtungen 15, 16 regeln die Lage der einseitigen Bahnen sowie die benötigten Bahnspannungen. Von einer Decklagenvorratsrolle 13 wird die Decklage über einen Vorratsspeicher zur Lagebeeinflussungsvorrichtung 14 geleitet. Vor der Lagebeeinflussungsvorrichtung 14 kann wiederum ein Breiten- und/oder Feuchtigkeitserfassungsmittel angeordnet werden, um auch die Breite der Deckbahn oder ihre Feuchtigkeit zu erfassen. FIG. 3 shows a schematic representation of a merge, laminating and a heating and traction area. Here are the one or more one-sided paths passed. The position-influencing devices 15, 16 regulate the position of the single-sided webs as well as the required web tension. From a cover layer supply roll 13, the cover layer is passed to the position control device 14 via a storage device. In turn, a width and / or moisture detection means can be arranged in front of the position-influencing device 14 in order to also detect the width of the cover sheet or its moisture.

Nach den Lagebeeinflussungsvorrichtungen 14, 15, 16 werden die Bahnen über einen Vorheizer 17 und ein Leimwerk 19 zur Kaschierung 21 geleitet, wo die Bahnen zusammengefügt werden. Hier ist eine möglichst genaue Positionierung der Bahnen zueinander wünschenswert. Nur wenn die Bahnen auf einer Seite alle bündig zueinander verleimt werden, kann mit Naturkante gearbeitet werden. Alternativ können auch alle Bahnen mittig zueinander ausgerichtet werden. Entscheidend ist jedoch, dass die Position der Bahnen an der Stelle der Kaschierung 21 von höchster Bedeutung ist, wobei die letzten Lagebeeinflussungsvorrichtungen 14, 15, 16 noch vor dem Vorheizer 17 platziert sind. Aus baulichen Gründen können diese nicht näher an die Kaschierung herangebracht werden. Die letzte Lageregelungsmöglichkeit ist also ein ganzes Stück von der Kaschierung 21 entfernt.After the attitude control devices 14, 15, 16, the webs are passed via a preheater 17 and a gluing unit 19 to the lamination 21, where the webs are joined together. Here the most accurate positioning of the webs to each other is desirable. Only when the webs are all glued together flush on one side, you can work with natural edge. Alternatively, all tracks can be aligned centrally with each other. critical is, however, that the position of the webs at the location of the lamination 21 is of the utmost importance, with the last position-influencing devices 14, 15, 16 still being placed in front of the pre-heater 17. For structural reasons, these can not be brought closer to the lamination. The last position control option is thus a whole distance from the lamination 21.

Aus diesem Grund sieht die Erfindung Lageerfassungsmittel 18, 20 vor, durch die Informationen über die Bahnlagen an Stellen gewonnen werden können, die wesentlich näher an der entscheidenden Kaschierstellen sind. Es können je nach Bedarf nur einzelne der Lageerfassungsmittel 18, 20 eingebaut werden. So kann z.B. nur nach dem Leimwerk 19 gemessen werden und es müssen auch nicht alle Bahnen gemessen werden. Die Informationen, die durch die Lageerfassungsmittel 18, 20 gewonnen werden, werden zur Steuerung der Lagebeeinflussungsvorrichtungen 14, 15, 16 verwendet.For this reason, the invention provides position detection means 18, 20, can be obtained by the information about the web layers in places that are much closer to the crucial laminating. It can be installed as needed only one of the position detection means 18, 20. Thus, e.g. only be measured after Glimwerk 19 and not all tracks must be measured. The information obtained by the position detection means 18, 20 is used to control the attitude control devices 14, 15, 16.

Hier sind wiederum verschiede Arten der Informationsverwendung möglich. Jede Bahn kann separat betrachtet werden und auf eine bestimmte Position geregelt werden, wobei die Abweichung von diesem Wert, die durch ein Lageerfassungsmittel 18, 20 gemessen wird, als Soll-Wert für die Steuerung des Lagebeeinflussungsvorrichtungen 14, 15, 16 verwendet wird.Here again different types of information use are possible. Each lane may be viewed separately and controlled to a particular position, with the deviation from this value, as measured by a position sensing means 18, 20, being used as the target value for the control of the attitude controllers 14, 15, 16.

Alternativ kann eine Bahn, insbesondere die Deckbahn, als Referenz dienen. Dann werden die Lagen der anderen Bahnen relativ zu dieser gesteuert. Zudem kann die Information, die für die Referenzbahn gewonnen wird, zur Steuerung der anderen Bahnen verwendet werden, um diese nachzuführen oder um die Dynamik der Referenzbahn zu kompensieren.Alternatively, a web, in particular the cover sheet, serve as a reference. Then the layers of the other webs are controlled relative to this. In addition, the information obtained for the reference trajectory can be used to control the other trajectories to track them or to compensate for the dynamics of the reference trajectory.

Eine Berücksichtigung der Dynamik ist insbesondere möglich, wenn zugleich im Bereich des Vorheizers 17 und im Bereich des Leimwerks 19 gemessen wird.A consideration of the dynamics is possible in particular if measured at the same time in the area of the preheater 17 and in the area of the gluing unit 19.

Weiterhin können die Lagebeeinflussungsvorrichtungen 4, 14, 15, 16 selber mit Lageerfassungsmitteln ausgestattet sein.Furthermore, the position-influencing devices 4, 14, 15, 16 can themselves be equipped with position detection means.

Bei der Verwendung der Informationen, die von den Lageerfassungsvorrichtungen 18, 20 gewonnen werden, wird die Strecke, die die Bahn zwischen Lagebeeinflussungsvorrichtung 4, 14, 15, 16 und Messort zurückzulegen hat, und die Bahngeschwindigkeit berücksichtigt. Zusätzlich zur Totzeit können Dämpfungen eingestellt werden.In using the information obtained from the attitude detection devices 18, 20, the distance the track has to travel between attitude control device 4, 14, 15, 16 and measurement location and the web speed is taken into account. In addition to the dead time, damping can be set.

Für die Lageerfassungsvorrichtungen 18, 20 können zusätzlich oder alternativ Breiten- und/oder Feuchtigkeitserfassungsmittel verwendet werden. Hierdurch kann die gewünschte Feuchtigkeit der Bahnen bei der Kaschierung 21 sichergestellt werden. Zudem können alle Breiten vor der Kaschierung 21 gemessen werden.For the position detection devices 18, 20 additionally or alternatively width and / or moisture detection means can be used. In this way, the desired moisture of the webs can be ensured in the lamination 21. In addition, all widths before the lamination 21 can be measured.

Nach der Kaschierung 21 wird die Bahn im Heiz- und Zugbereich getrocknet. Umlaufende Bänder ziehen die Bahn durch diesen Bereich, dabei wird sie an Heizelementen vorbeigeleitet. Durch Einbringung von Wärme wird der Pappe Feuchtigkeit entzogen und sie wird getrocknet.After lamination 21, the web is dried in the heating and drawing area. Circulating belts pull the web through this area, while it is guided past heating elements. By introducing heat, the cardboard is deprived of moisture and dried.

Figur 4 ist eine schematische Darstellung einer Endverarbeitung. Hinter dem Heiz- und Zugbereich 22 ist ein weiteres Breiten- und/oder Feuchtigkeitserfassungsmittel 23 angeordnet. Die gemessene Feuchtigkeit dient zur Regelung der einzubringenden Wärmeenergie im Heiz- und Zugbereich 22. Die gemessene Breite wird verwendet, um zusammen mit den Breitenwerten, die nach dem Abwickeln gemessen wurden, einen Schrumpffaktor für den gesamten Herstellungsprozess zu ermitteln. Dieser gibt Aufschluss über die Qualität des verwendeten Ausgangsmaterials. Zudem kann der hier gemessene Wert auch verwendet werden, um die Positionierung bei der Kaschierung 21 zu bewerten, und unter Umständen zu verbessern. So sollte die Pappbahn an der Stelle der Messung nach dem Heiz- und Zugbereich 22 nicht deutlich breiter sein als die Einzelbahnen vor der Kaschierung 21. Weiterhin kann der Schrumpffaktor des Heiz- und Zugbereichs 22 bestimmt werden. FIG. 4 is a schematic representation of a final processing. Behind the heating and traction region 22, a further width and / or moisture detection means 23 is arranged. The measured moisture is used to control the heat energy to be applied in the heating and drawing area 22. The measured width is used to determine a shrinkage factor along with the width values measured after unwinding for the entire manufacturing process. This gives information about the quality of the raw material used. In addition, the value measured here can also be used to evaluate, and possibly improve, the positioning of the liner 21. Thus, the cardboard web should not be significantly wider than the single webs at the point of measurement after the heating and traction region 22 the lamination 21. Furthermore, the shrinkage factor of the heating and traction region 22 can be determined.

Die Bahn wird zum ersten Beschneiden 24 weitergeleitet. Hier werden herkömmlicherweise die Ränder der Bahn beschnitten oder getrimmt. Die Erfindung ermöglicht das Arbeiten mit Naturkante, in diesem Fall muss die Wellpappe nur auf einer Seite getrimmt werden. Das erfindungsgemäße System muss jedoch nicht mit Naturkante betrieben werden. Im weiteren Verlauf wird die Bahn in Längs- und Querrichtung auf gewünschte Abmessungen geschnitten und in ein Lager geleitet, das auf der rechten Seite der Figur 4 schematisch dargestellt ist.The web is forwarded to the first cropping 24. Here conventionally the edges of the web are trimmed or trimmed. The invention allows working with natural edge, in this case, the corrugated board must be trimmed only on one side. However, the system according to the invention does not have to be operated with a natural edge. In the further course, the web is cut longitudinally and transversely to desired dimensions and passed into a warehouse, which on the right side of the FIG. 4 is shown schematically.

Claims (40)

  1. Method for position control of one or more webs, particularly of paper-like or cardboard-like webs, which comprises the following steps:
    - detection of first position information for one or more webs downstream of one or more position manipulation apparatuses (4, 14, 15, 16) by first position detection means (18), the first position detection means (18) being arranged in the region of a pre-heater (17);
    - controlling the web position(s) by the position manipulation apparatuses (4, 14, 15, 16) using the first position information detected downstream,
    characterized in that
    a detection of third position information by third position detection means (20) is done in the region of a glue unit (19), and that the first position information as well as the third position information is used to control the position manipulation apparatuses (4, 14, 15, 16).
  2. Method for position control according to claim 1, wherein the position of a web is used as a reference value for controlling the other webs, and a respective predetermined value gives the desired relative position of the respective other web.
  3. Method for position control according to claim 1 or 2, wherein the web center and/or one or both web edges are used for determining the web position.
  4. Method for position control according to one of the previous claims, wherein further second position information for one or more webs in the region of the position manipulation apparatuses (4, 14, 15, 16) is detected by second position detection means.
  5. Method for position control according to one of the previous claims, wherein further the second position information, particularly its change, is used for controlling the position manipulation apparatuses (4, 14, 15, 16) of one or more of the other webs, particularly to reduce position displacements of the webs with respect to each other.
  6. Method for position control according to claim 5, wherein the second position information is related to the cover web to which the positions of the one or more other webs are controlled.
  7. Method for position control according to one of the previous claims, wherein the control takes the web speed and the distance into account, which the web to be controlled has to cover between the position manipulation apparatus (4, 14, 15, 16) and the position detection means (18).
  8. Method for position control according to one of the previous claims, wherein the position manipulation apparatuses (14, 15, 16) are arranged upstream of the region of the pre-heater, particularly on the bridge.
  9. Method for position control according to one of the claims 1 to 7, wherein the position manipulation means (4) is arranged upstream of a material layer heater and/or a material layer humidification.
  10. Method for position control according to one of the claims 1 to 7 or 9, wherein, by controlling one material layer depending on the first position information, the position of both material layers with respect to each other is optimized, particularly that they lie centered over each other or that the edges of one side lie over each other.
  11. Method for position control according to one of the previous claims, wherein the step of controlling the web positions controls the position manipulation apparatuses (4, 14, 15, 16), so that the web positions are flush with each other on one side, particularly so that this side does not need to be trimmed anymore.
  12. Method for position control according to one of the previous claims, wherein optical sensors, cameras, CCD cameras, ultrasonic devices or piezoelectric elements using ultrasound are used as position detection means (7, 18, 20).
  13. Method for position control according to one of the previous claims, wherein the method is employed within an installation for corrugated cardboard manufacturing, particularly for multi-layer corrugated cardboards.
  14. Method, particularly according to one of the previous claims, wherein the web width of at least one web is measured at a plurality of positions in the course of the corrugated cardboard manufacturing.
  15. Method according to claim 14, wherein a first web width and/or a first web moisture is measured after unwinding from a supply roller.
  16. Method according to claim 15, wherein, after the production of a single-face corrugated cardboard, a second web width and/or a second web moisture is measured, and particularly the first web widths and the second web width are used to judge the accuracy of joining.
  17. Method according to one of the claims 14 to 16, wherein a web width and/or a web moisture is measured before the lamination and/or directly after the lamination (21) in front of the heat and pull area (22) and/or before the first trimming (24) of the web.
  18. Method according to claim 17, wherein further a shrink factor is determined from the web widths and/or the web moistures before the first trimming (24) of the web and the first web widths and/or the first web moistures.
  19. Method according to claim 17, wherein the web widths before the lamination and the web width before the first trimming (24) of the web are used to judge the accuracy of the joining and/or the alignment.
  20. System for position control of one or more webs, particularly of paper-like or cardboard-like webs, which comprises at least one position manipulation apparatus (4, 14, 15, 16) and first position detection means (18), which are arranged downstream of the position manipulation apparatus (4, 14, 15, 16), wherein a detection of the first position information by the first position detection means (18) is done in the region of the pre-heater (17), and wherein at least one position manipulation apparatus (4, 14, 15, 16) is adapted to take into account position information data attained downstream by the first position detection means (18),
    characterized in that
    a detection of third position information by third position detection means (20) is done in the region of the glue unit (19), and that the system is adapted, so that the first position information as well as the third position information is used to control the position manipulation apparatuses (4, 14, 15, 16).
  21. System for position control according to claim 20, wherein the system is adapted, so that the position of a web is used as a reference value for controlling the other webs, and a respective predetermined value gives the desired relative position of the respective other web.
  22. System for position control according to claim 20 or 21, wherein the system is adapted, so that the web center and/or one or both web edges are used for determining the web position.
  23. System for position control according to one of the claims 20 to 22, wherein the system is adapted, so that further second position information for one or more webs in the region of the position manipulation apparatuses (4, 14, 15, 16) is detected by second position detection means.
  24. System for position control according to one of the claims 20 to 23, wherein the system is adapted, so that further the second position information, particularly its change, is used for controlling the position manipulation apparatuses (4, 14, 15, 16) of one or more of the other webs, particularly to reduce position displacements of the webs with respect to each other.
  25. System for position control according to claim 24, wherein the system is adapted, so that the second position information is related to the cover web to which the positions of the one or more other webs are controlled.
  26. System for position control according to one of the claims 20 to 25, wherein the system is adapted, so that the control takes the web speed and the distance into account, which the web to be controlled has to cover between the position manipulation apparatus (4, 14, 15, 16) and the position detection means (7, 18, 20).
  27. System for position control according to one of the claims 20 to 26, wherein the system is adapted, so that the position manipulation apparatuses (14, 15, 16) are arranged upstream of the region of the pre-heater, particularly on the bridge.
  28. System for position control according to one of the claims 20 to 26, wherein the system is adapted, so that the position manipulation means (4) is arranged upstream of a material layer heater and/or a material layer humidification.
  29. System for position control according to one of the claims 20 to 26 or 28, wherein the system is adapted, so that by controlling one material layer depending on the first position information, the position of both material layers with respect to each other is optimized, particularly that they lie centered over each other or that the edges of one side lie over each other.
  30. System for position control according to one of the claims 20 to 29, wherein the system is adapted, so that the control of the web positions controls the position manipulation apparatuses (4, 14, 15, 16), so that the web positions are flush with each other on one side, particularly that this side does not need to be trimmed anymore.
  31. System for position control according to one of the claims 20 to 30, wherein the system is adapted, so that optical sensors, cameras, CCD cameras, ultrasonic devices or piezoelectric elements using ultrasound are used as position detection means (7, 18, 20).
  32. System for position control according to one of the claims 20 to 31, wherein the system is adapted, so that the system can be used within an installation for corrugated cardboard manufacturing, particularly of multi-layer corrugated cardboard manufacturing.
  33. System, particularly according to one of the claims 20 to 32, wherein the system is adapted, so that the web width of at least one web is measured at a plurality of positions in the course of the corrugated cardboard manufacturing.
  34. System according to claim 33, wherein the system is adapted, so that the first web width and/or a first web moisture is measured after unwinding from a supply roller.
  35. System according to claim 34, wherein the system is adapted, so that, after the production of a single-face corrugated cardboard, a second web width and/or a second web moisture is measured, and particularly the first web widths and the second web width are used to judge the accuracy of joining.
  36. System according to one of the claims 33 to 35, wherein the system is adapted, so that a web width and/or a web moisture is measured before the lamination and/or directly after the lamination (21) in front of the heat and pull area (22) and/or before the first trimming (24) of the web.
  37. System according to claim 36, wherein the system is adapted, so that further a shrink factor is determined from the web widths and/or the web moistures before the first trimming (24) of the web and the first web widths and/or the first web moistures.
  38. System according to claim 36, wherein the system is adapted, so that the web widths before the lamination and the web width before the first trimming (24) of the web are used to judge the accuracy of the joining and/or the alignment.
  39. Installation for manufacturing of corrugated cardboard, wherein a merging and lamination station has a system according to one of the claims 20 to 38.
  40. Installation for manufacturing of corrugated cardboard according to claim 39, further having one or more single-face groups and/or a heat and pull area (22) and/or a final processing.
EP06023445A 2005-12-15 2006-11-10 Method and system for the position control of webs and corrugated cardboard with unfinished edges Active EP1798177B1 (en)

Applications Claiming Priority (1)

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DE102005059970A DE102005059970A1 (en) 2005-12-15 2005-12-15 Method and system for position control of webs and corrugated board with natural edge

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DE102008035639A1 (en) * 2008-07-31 2010-02-04 Robert Bosch Gmbh Method for modeling a control loop for a processing machine
DE102009019624A1 (en) 2009-04-30 2010-11-04 Robert Bosch Gmbh Method for determining at least one controller parameter of a control element in a web tension control loop for a processing machine
DE102009019642A1 (en) * 2009-04-30 2010-11-04 Volkswagen Ag Device for actuating a hydraulic clutch of a motor vehicle and assembly method thereto
CN102275338B (en) * 2011-08-11 2013-01-09 湖北京山轻工机械股份有限公司 Single-side machine with accurate synchronous transferring device
JP2013146913A (en) * 2012-01-19 2013-08-01 Phonic:Kk Method for producing corrugated cardboard sheet
CN102852027B (en) * 2012-08-12 2014-05-07 湖北京山轻工机械股份有限公司 Corrugated paper board production line with wet-stage full-automatic non-stop order change system
FI127490B (en) * 2014-02-28 2018-07-13 Metso Automation Oy Equipment and method for the control and production of corrugated fibreboard
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CN105775882B (en) * 2016-04-27 2018-11-13 昆山巨闳机械科技有限公司 Triple axle PP cuts stacker
CN105946292A (en) * 2016-07-04 2016-09-21 程度远 Multiple-type synchronous energy-saving corrugated line production equipment
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CA2568880A1 (en) 2007-06-15
CN1990368A (en) 2007-07-04
DE502006006774D1 (en) 2010-06-02
CN1990368B (en) 2011-01-19
JP2007160932A (en) 2007-06-28
EP1798177A2 (en) 2007-06-20
ATE465111T1 (en) 2010-05-15
EP1798177A3 (en) 2008-06-11
JP4568266B2 (en) 2010-10-27

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