EP1596002A1 - Papermaking machine - Google Patents

Papermaking machine Download PDF

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Publication number
EP1596002A1
EP1596002A1 EP05101128A EP05101128A EP1596002A1 EP 1596002 A1 EP1596002 A1 EP 1596002A1 EP 05101128 A EP05101128 A EP 05101128A EP 05101128 A EP05101128 A EP 05101128A EP 1596002 A1 EP1596002 A1 EP 1596002A1
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EP
European Patent Office
Prior art keywords
fibrous web
machine
measuring
web
machine according
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.)
Granted
Application number
EP05101128A
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German (de)
French (fr)
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EP1596002B1 (en
Inventor
Rudolf Münch
Egon Bild
Siegfried Daum
Joerg Maurer
Tobias Wanke
Werner Reichert
Wolfgang Klotzbuecher
Josef Wigand
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Voith Patent GmbH
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Voith Paper Patent GmbH
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Publication of EP1596002A1 publication Critical patent/EP1596002A1/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper

Definitions

  • the invention relates to a machine for producing a paper, cardboard, Tissue or another fibrous web from a pulp suspension or to Refining or further processing of the fibrous web.
  • this object is achieved in that in the machine at least one arrangement for applying at least two in the longitudinal direction spaced apart markings on the fibrous web and an in Web running direction of the fibrous web of the arrangement downstream, in particular Non-contact measuring device for measuring the distance of the markings is appropriate.
  • the measured with the measuring device distance between the, for example, each other following markings will be followed by the known distance at the Setting the markers compared, reducing the elongation of the fibrous web is determined.
  • further measurements such as For example, the speed of the fibrous web, the train at certain points or the like. Be considered.
  • the mark is not limited to stroke marks is, but that the mark can include one code, the other Information such as absolute values of the fibrous web length at the marking, paper type, etc.
  • the code can be used as numeric code, for example or be designed as a bar code.
  • the measuring system integrate in different places in one machine and for different Use process steps, so that the stretching of the web in the Process chain that goes through this, even in the machine for the production of Fibrous web offline subordinate aggregates as in a winding machine to follow up.
  • This then also allows the wrapped tensile stress determine.
  • Depending on measured strains and through this caused "stress" for the pulp, especially the paper, can then be make a statement about what residual extensibility the pulp material still until demolished. This dependence can be in a stress-strain diagram put up.
  • train measurements can be Make statements about the elastic modulus of the pulp. Leave these measurements itself with a softsensor for measuring strength properties in correlation with further data determined in a laboratory.
  • a soft-sensor is a software-based sensor for raw measurement data in the form of quality or process data during the manufacturing process or refining process, with measurements in the raw measurement data of quality parameters in the laboratory are included, and where the raw measurement data can be summarized to records, each determined simultaneously where certain laboratory or quality measurements are selectable as target data are by means of at least one in a computer-based operation and Linking unit running softsensor algorithm from the as input data serving other data are calculable, and wherein each record is measured data contains approximately the same control volume of raw material, in particular paper or paper raw material.
  • the origin of Wicket when winding the Analyze fibrous web to a winding roll.
  • a yardstick for the find "true length" of wound in a winding roll web including Markings on the fibrous web, in particular on its outer edge, can be used.
  • the arrangement in a Siebformer or in a press section of the machine for producing the Fiber web is arranged. This could cause stretching of the fibrous web the inventive method in the Formierpartie or the press section be determined.
  • At least one other measuring means for measuring the length of a section of the fibrous web in the machine available is at least one other measuring means for measuring the length of a section of the fibrous web in the machine available.
  • a mark applied by the arrangement can be applied the fibrous web nacheichen to a correlation of the marker with others To achieve length measuring devices.
  • a further measuring means are in particular a means for non-contact Measurement, a rotary encoder, a trigger device, one mounted on a roller Measuring device, in particular an encoder, or a device for measuring a drive signal.
  • the invention also provides the use of a comparison means for Compare the of the measuring device and the other measuring means measured values, in particular a control computer, provided.
  • a comparison means for Compare the of the measuring device and the other measuring means measured values in particular a control computer, provided.
  • the through the non-contact measurement, the measurement of the track length via encoders, Trigger, etc. on rollers and the measurement of the drive signals at various Make data obtained in the production process of the fibrous web can be in this way compare with the original marking information.
  • an evaluation unit for evaluating the of the Comparative means in particular the control computer, obtained measured values about the elongation during the production of the fibrous web and for storage or archiving the data obtained.
  • the evaluation unit with a further control computer connected in an additional, especially offline to the machine working process unit is arranged.
  • the tensile and elongation of the fibrous web become independent captured from each other, so that the strain over a long process is traceable.
  • a machine for producing or treating a fibrous web 1 comprises an array of cylinders 2 to 8, over or between them through the fibrous web 1 is guided. Between the cylinder 2 and the Cylinder pair 3, 4 is an arrangement 9 for applying web edge markings on the fibrous web 1 available. Between the cylinder pair 3, 4 and one out The cylinders 5 to 8 existing cylinder group is a device 10 for Non-contact speed measurement of the fibrous web 1 is arranged.
  • a roller 11 On a roller 11 is an aggregate 12 for measuring the on the fibrous web. 1 exercised train attached. At a further roller 13 is a rotary encoder 14th Installed.
  • the arrangement 9 and the measuring devices 10, 12 and 14 indicate their data a control computer 15 on, which evaluates them. Also an offline of the Machine arranged process unit 16 is connected to measuring units 17, 18, 19 for Determining the distance of the markings on the fibrous web 1 and / or to Calculation of the rotational speed of rollers or cylinders equipped, the forward their data to a control computer 20.
  • This one is like that Control computer 15 connected to an evaluation unit 21, in which the strain the fibrous web 1 in different process steps and at different Traced and archived in the process of their manufacture.
  • a likewise equipped with means for strain measurement paper machine becomes from a headbox 22 a pulp suspension a gap fed between two wires 23 and 24 of a twin wire former 25.
  • a twin wire former 25 On the Radius of a forming roller 26 run the wires 23, 24 in a wedge shape toward each other and trap the pulp suspension between them.
  • This is a first Dewatering of the pulp suspension, and it forms a fiber mat, from the a paper web 27 is created.
  • the twin-wire former 25 is followed by a press section 29.
  • the press section 29 comprises three pressing stations 30, 31, 32.
  • the first two pressing points 7, 8 form a tandem Nipco Flex press section, in each one roller 33, 34 cooperates with a shoe press roll 35, 36.
  • a guide rollers 38 and drying cylinder 39 closes having drying section 40, in which also the elongation of the paper web 27th By means of a measuring device 41 is determined.
  • the paper web 27 between a shoe roll 42nd and a roller 43 of a shoe calender 44 used as a calender passed.
  • the paper web 27 enters a two Film rollers 45, 46 having film press.
  • the paper web 27 is operated by an air pressure Deflection element 52 forwarded to a floating dryer 53 through which the Paper web 27 is dried on both sides by means of heat radiation or hot air and behind the preferably also a measuring device 54 for measuring the Elongation of the paper web 27 is installed.
  • the now re-dried paper web 27 is closed a nozzle moisturizer 57 continued through which they again up to a moisture level and moisture gradient is rewetted.
  • the web 27 is smoothed in a calender 58.
  • the calender 58 leaving paper web 27 is then in a winding machine 59 to a Paper roll wound up.
  • the winding machine 59 for winding the paper web 27th can also offline from the machine for making the paper web 27 out of the Be arranged pulp suspension.
  • Also behind the nozzle moistener 57 and / or behind the calender 58 are measuring devices 60 and 61 for strain measurement arranged.
  • Rotary encoder for measuring the circumferential speed of the associated rollers or cylinder to the correlation between the peripheral speed and to be able to determine the elongation and the slippage of the paper web 27. All from the encoders, the measuring devices 37, 41, 51, 60, 61 as well as others Means for measuring the speeds of the paper web 27 and the Rolling or cylinder measured data are a control computer (see. Fig. 1).

Landscapes

  • Paper (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

The machine for the production or finishing of paper, tissue or cardboard. from a pulp, has at least one marking unit (9) to apply at least two marks to the web (1), with a longitudinal gap between them in the direction of web travel. A monitor (10) is after the marking unit, to measure the space between the marks by scanning without contact. The marking unit is at the fourdrinier or the press section. A further monitor is at a roller (13), as a rotary transmitter (14) or trigger, which measures moving web lengths especially as an encoder or a drive signal meter. A control (15) compares the signals from the two monitors, linked to an evaluation unit (21) which is connected to a further control (20) with an off-line processor (16).

Description

Die Erfindung bezieht sich auf eine Maschine zum Herstellen einer Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn aus einer Faserstoffsuspension oder zum Veredeln oder Weiterverarbeiten der Faserstoffbahn.The invention relates to a machine for producing a paper, cardboard, Tissue or another fibrous web from a pulp suspension or to Refining or further processing of the fibrous web.

Aus der WO 99/22067 ist beispielsweise eine Papiermaschine zur Herstellung einer Papierbahn aus einer Faserstoffsuspension bekannt.From WO 99/22067, for example, a paper machine for producing a Paper web known from a pulp suspension.

Bei der Herstellung von Faserstoffbahnen und auch bei ihrer Weiterverarbeitung, Veredlung oder Weiterbehandlung, beispielsweise während eines Druckprozesses, entsteht das Problem der Längenveränderung durch Bahnzug oder durch Dehnung der Bahn, die aufgrund der Druckbehandlung, der thermischen Behandlung oder infolge eines sich ändernden Feuchtigkeitsgehalts eintritt.In the production of fibrous webs and also in their further processing, Finishing or further processing, for example during a printing process, the problem of length changes due to web tension or stretching arises the web, due to the pressure treatment, the thermal treatment or due to a changing moisture content occurs.

Es ist daher notwendig, die Dehnung zu messen. Nach dem Stand der Technik erfolgen derartige Messungen nur indirekt über einen Vergleich der Antriebsgeschwindigkeiten innerhalb einer Maschine oder über eine Analyse der Wickelhärte eines aus der Faserstoffbahn in einer Wickelmaschine erzeugten Bahnwickels. Ein derartiges Verfahren hat den Nachteil, dass sich keine Informationen über Dehnungen innerhalb des Herstellungsprozesses gewinnen lassen, insbesondere auch nicht beim Wechsel aus der einen Maschine zu einer anderen Maschine, in der die Faserstoffbahn "offline" weiterverarbeitet wird. Ein derartiger Wechsel tritt beispielsweise ein, wenn die Faserstoffbahn bei ihrer Herstellung aus der Faserstoffsuspension zunächst auf einen Wickel aufgewickelt wird, der zwischengespeichert wird und in einem späteren Arbeitsschritt mittels Längsschneideinrichtungen in mehrere Rollen einer gewünschten Breite geschnitten wird oder wenn die auf einem Wickel gespeicherte Faserstoffbahn zu einem späteren Zeitpunkt in einer Streichmaschine mit einem Medium bestrichen wird. It is therefore necessary to measure the elongation. According to the state of the art such measurements are made only indirectly via a comparison of Drive speeds within a machine or via an analysis of the Winding hardness of a produced from the fibrous web in a winding machine Web roll. Such a method has the disadvantage that no Gain information about strains within the manufacturing process especially when changing from one machine to another another machine in which the fibrous web is processed "offline". One Such change occurs, for example, when the fibrous web at their Production from the pulp suspension initially wound on a winding is cached and in a later step by means of Slitting cut into several rolls of a desired width or if the fibrous web stored on a roll becomes a later Time is coated in a coating machine with a medium.

Bei den herkömmlich gemessenen Dehnungen verfälscht Schlupf der Faserstoffbahn gegenüber den Oberflächen der antreibenden Walzen die Aussagen der Antriebssignale. Wenn man die Dehnung einer Materialbahn aus der Wickelhärte ermitteln möchte, sind hierbei zusätzliche, das Ergebnis verfälschende Faktoren zu berücksichtigen, die nicht nur die "eingewickelte Zugspannung" wiedergeben, sondern die infolge von eingewickelter Luft, Profilschwankungen, etc. entstehen, so dass auch die Wickelhärte kein hinreichend genaues Maß für die Dehnung einer Faserstoffbahn ist.At the conventionally measured strains, slippage of the fibrous web is distorted towards the surfaces of the driving rollers the statements of Drive signals. If one considers the stretching of a material web from the winding hardness In this case, additional factors distorting the result are to be determined that not only reflect the "wrapped tension", but which arise as a result of wound air, profile fluctuations, etc., so that the winding hardness is not a sufficiently accurate measure of the elongation of a Fibrous web is.

Es ist die Aufgabe der Erfindung, eine Maschine zu schaffen, in der sich die Dehnung der Materialbahn genau bestimmen lässt.It is the object of the invention to provide a machine in which the elongation the material web can be determined exactly.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass in der Maschine mindestens eine Anordnung zum Aufbringen von mindestens zwei in Längsrichtung voneinander beabstandeten Markierungen auf die Faserstoffbahn und eine in Bahnlaufrichtung der Faserstoffbahn der Anordnung nachgeordnete, insbesondere berührungslose, Messeinrichtung zum Messen des Abstands der Markierungen angebracht ist.According to the invention, this object is achieved in that in the machine at least one arrangement for applying at least two in the longitudinal direction spaced apart markings on the fibrous web and an in Web running direction of the fibrous web of the arrangement downstream, in particular Non-contact measuring device for measuring the distance of the markings is appropriate.

Der mit der Messeinrichtung gemessene Abstand zwischen den, bspw. aufeinander folgenden Markierungen wird anschließend mit dem bekannten Abstand bei der Setzung der Markierungen verglichen, wodurch die Dehnung der Faserstoffbahn ermittelt wird. Optional können bei dem Vergleich noch weitere Messungen, wie bspw. die Geschwindigkeit der Faserstoffbahn, der Bahnzug an bestimmten Stellen oder dgl. berücksichtigt werden.The measured with the measuring device distance between the, for example, each other following markings will be followed by the known distance at the Setting the markers compared, reducing the elongation of the fibrous web is determined. Optionally, in the comparison, further measurements, such as For example, the speed of the fibrous web, the train at certain points or the like. Be considered.

Des weiteren ist anzumerken, dass die Markierung nicht auf Strichzeichen beschränkt ist, sondern, dass die Markierung einen Code beinhalten kann, der weitere Informationen wie bspw. Absolutwerte der Faserstoffbahnlänge an der Markierung, der Papierart usw. umfasst. Der Code kann hierbei beispielsweise als Zahlencode oder als Bar-Code ausgebildet sein. It should also be noted that the mark is not limited to stroke marks is, but that the mark can include one code, the other Information such as absolute values of the fibrous web length at the marking, paper type, etc. The code can be used as numeric code, for example or be designed as a bar code.

Vorteile der erfindungsgemäßen Lösung bestehen darin, dass sich das Messsystem an verschiedenen Stellen in einer Maschine integrieren und für verschiedene Prozessschritte einsetzen lässt, so dass sich die Dehnung der Materialbahn in der Prozesskette, die diese durchläuft, auch in der Maschine zur Herstellung der Faserstoffbahn offline nachgeordneten Aggregaten wie in einer Wickelmaschine weiterverfolgen lässt. Daraus lässt sich dann auch die eingewickelte Zugspannung ermitteln. In Abhängigkeit von gemessenen Dehnungen und dem durch diese verursachten "Stress" für den Faserstoff, insbesondere das Papier, lässt sich dann eine Aussage darüber treffen, welche Restdehnbarkeit das Faserstoffmaterial noch bis zum Abriss aufweist. Diese Abhängigkeit lässt sich in einem Spannungs-Dehnungs-Diagramm aufstellen. In Verbindung mit Zugmessungen lassen sich Aussagen zum Elastizitätsmodul des Faserstoffs treffen. Diese Messungen lassen sich mit einem Softsensor zur Messung von Festigkeitseigenschaften in Korrelation mit weiteren, in einem Labor ermittelten Daten verifizieren.Advantages of the solution according to the invention are that the measuring system integrate in different places in one machine and for different Use process steps, so that the stretching of the web in the Process chain that goes through this, even in the machine for the production of Fibrous web offline subordinate aggregates as in a winding machine to follow up. This then also allows the wrapped tensile stress determine. Depending on measured strains and through this caused "stress" for the pulp, especially the paper, can then be make a statement about what residual extensibility the pulp material still until demolished. This dependence can be in a stress-strain diagram put up. In conjunction with train measurements can be Make statements about the elastic modulus of the pulp. Leave these measurements itself with a softsensor for measuring strength properties in correlation with further data determined in a laboratory.

Unter einem Softsensor ist ein Software basierter Sensor zu verstehen, bei dem Roh-Messdaten in Form von Qualitäts- bzw. Prozessdaten während des Herstellungs- bzw. Veredelungsprozesses vorliegen, wobei in die Roh-Messdaten auch Messungen von Qualitätsparametem im Labor mit einbeziehbar sind, und wobei die Roh-Messdaten zu Datensätzen zusammenfassbar sind, die jeweils gleichzeitig ermittelt wurden, wobei bestimmte Labor- oder Qualitätsmessungen als Zieldaten auswählbar sind, die mittels wenigstens einem in einer computerbasierten Operations- und Verknüpfungseinheit ablaufenden Softsensor-Algorithmus aus den als Eingangsdaten dienenden anderen Daten berechenbar sind, und wobei jeder Datensatz Messdaten enthält, die sich in etwa auf dasselbe Kontrollvolumen Bahn- bzw. Rohmaterial, insbesondere Papier bzw. Papierrohstoff, beziehen.A soft-sensor is a software-based sensor for raw measurement data in the form of quality or process data during the manufacturing process or refining process, with measurements in the raw measurement data of quality parameters in the laboratory are included, and where the raw measurement data can be summarized to records, each determined simultaneously where certain laboratory or quality measurements are selectable as target data are by means of at least one in a computer-based operation and Linking unit running softsensor algorithm from the as input data serving other data are calculable, and wherein each record is measured data contains approximately the same control volume of raw material, in particular paper or paper raw material.

Durch die Erfindung lässt sich die Herkunft von Wicketfehlern beim Aufwickeln der Faserstoffbahn zu einer Wickelrolle analysieren. Ebenso lässt sich mittels Dehnungsmessungen in Verbindung mit Längenmessungen ein Maßstab für die "wahre Länge" der in einer Wickelrolle aufgewickelten Bahn finden, wozu auch Markierungen auf der Faserstoffbahn, insbesondere an deren äußerem Rand, herangezogen werden können.By the invention, the origin of Wicketfehlern when winding the Analyze fibrous web to a winding roll. Likewise can be by means of Strain measurements in conjunction with length measurements a yardstick for the find "true length" of wound in a winding roll web, including Markings on the fibrous web, in particular on its outer edge, can be used.

Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen, der Beschreibung und den Zeichnungen.Advantageous developments of the invention will become apparent from the dependent claims, the description and the drawings.

In einer Ausgestaltung der Erfindung ist vorgesehen, dass die Anordnung in einem Siebformer oder in einer Pressenpartie der Maschine zum Herstellen der Faserstoffbahn angeordnet ist. Dadurch könnten Dehnungen der Faserstoffbahn mit dem erfindungsgemäßen Verfahren in der Formierpartie oder der Pressenpartie ermittelt werden.In one embodiment of the invention, it is provided that the arrangement in a Siebformer or in a press section of the machine for producing the Fiber web is arranged. This could cause stretching of the fibrous web the inventive method in the Formierpartie or the press section be determined.

In einer vorteilhaften Ausbildung der Erfindung ist mindestens ein weiteres Messmittel zum Messen der Länge eines Abschnitts der Faserstoffbahn in der Maschine vorhanden. Dadurch lässt sich eine durch die Anordnung aufgebrachte Markierung an der Faserstoffbahn nacheichen, um eine Korrelation der Markierung mit weiteren Längenmesseinrichtungen zu erzielen.In an advantageous embodiment of the invention is at least one other measuring means for measuring the length of a section of the fibrous web in the machine available. As a result, a mark applied by the arrangement can be applied the fibrous web nacheichen to a correlation of the marker with others To achieve length measuring devices.

Als weitere Messmittel eignen sich insbesondere ein Mittel zur berührungslosen Messung, ein Drehgeber, eine Triggereinrichtung, eine an einer Walze angebrachte Messeinrichtung, insbesondere ein Encoder, oder eine Einrichtung zur Messung eines Antriebssignals.As a further measuring means are in particular a means for non-contact Measurement, a rotary encoder, a trigger device, one mounted on a roller Measuring device, in particular an encoder, or a device for measuring a drive signal.

Mit Vorteil ist erfindungsgemäß auch der Einsatz eines Vergleichsmittels zum Vergleichen der von der Messeinrichtung und von dem weiteren Messmittel gemessenen Messwerte, insbesondere eines Steuerungsrechners, vorgesehen. Die durch die berührungslose Messung, die Messung der Bahnlänge über Drehgeber, Trigger, etc. an Walzen und die Messung der Antriebssignale an verschiedenen Stellen im Herstellungsprozess der Faserstoffbahn gewonnenen Daten lassen sich auf diese Weise mit den ursprünglichen Markierungsinformationen vergleichen. Advantageously, the invention also provides the use of a comparison means for Compare the of the measuring device and the other measuring means measured values, in particular a control computer, provided. The through the non-contact measurement, the measurement of the track length via encoders, Trigger, etc. on rollers and the measurement of the drive signals at various Make data obtained in the production process of the fibrous web can be in this way compare with the original marking information.

Zusätzlich kann mit Vorteil eine Auswerteeinheit zum Auswerten der von dem Vergleichsmittel, insbesondere dem Steuerungsrechner, gewonnenen Messwerte über die Dehnung während der Herstellung der Faserstoffbahn und zur Speicherung oder Archivierung der gewonnenen Daten eingesetzt werden.In addition, an evaluation unit for evaluating the of the Comparative means, in particular the control computer, obtained measured values about the elongation during the production of the fibrous web and for storage or archiving the data obtained.

Vorteilhaft wird die Auswerteeinheit mit einem weiteren Steuerungsrechner verbunden, der in einer zusätzlichen, insbesondere auch offline zu der Maschine arbeitenden Prozesseinheit angeordnet ist.Advantageously, the evaluation unit with a further control computer connected in an additional, especially offline to the machine working process unit is arranged.

Gemäß der Erfindung werden Zug und Dehnung der Faserstoffbahn unabhängig voneinander erfasst, so dass die Dehnung über einen weiten Prozessverlauf nachvollziehbar ist.According to the invention, the tensile and elongation of the fibrous web become independent captured from each other, so that the strain over a long process is traceable.

Anhand der Zeichnungen wird die Erfindung nachfolgend in zwei Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1
ein Schema zur Dehnungsbestimmung anhand eines Abschnitts aus einer Maschine zur Herstellung einer Faserstoffbahn und
Fig. 2
eine Papiermaschine mit Einrichtungen zur Bestimmung der Dehnung der Papierbahn.
Reference to the drawings, the invention will be explained in more detail below in two embodiments. Show it:
Fig. 1
a scheme for determining strain on the basis of a section of a machine for producing a fibrous web and
Fig. 2
a paper machine with means for determining the elongation of the paper web.

Eine Maschine zur Herstellung oder Behandlung einer Faserstoffbahn 1 (Fig. 1) umfasst eine Anordnung von Zylindern 2 bis 8, über die oder zwischen denen hindurch die Faserstoffbahn 1 geführt wird. Zwischen dem Zylinder 2 und dem Zylinderpaar 3, 4 ist eine Anordnung 9 zum Aufbringen von Bahnrandmarkierungen auf die Faserstoffbahn 1 vorhanden. Zwischen dem Zylinderpaar 3, 4 und einer aus den Zylindern 5 bis 8 bestehenden Zylindergruppe ist eine Einrichtung 10 zur berührungslosen Geschwindigkeitsmessung der Faserstoffbahn 1 angeordnet.A machine for producing or treating a fibrous web 1 (FIG. 1) comprises an array of cylinders 2 to 8, over or between them through the fibrous web 1 is guided. Between the cylinder 2 and the Cylinder pair 3, 4 is an arrangement 9 for applying web edge markings on the fibrous web 1 available. Between the cylinder pair 3, 4 and one out The cylinders 5 to 8 existing cylinder group is a device 10 for Non-contact speed measurement of the fibrous web 1 is arranged.

An einer Walze 11 ist ein Aggregat 12 zur Messung des auf die Faserstoffbahn 1 ausgeübten Zugs angebracht. An einer weiteren Walze 13 ist ein Drehgeber 14 installiert.On a roller 11 is an aggregate 12 for measuring the on the fibrous web. 1 exercised train attached. At a further roller 13 is a rotary encoder 14th Installed.

Die Anordnung 9 und die Messeinrichtungen 10, 12 und 14 geben ihre Daten an einen Steuerungsrechner 15 weiter, der diese auswertet. Auch eine offline von der Maschine angeordnete Prozesseinheit 16 ist mit Messeinheiten 17, 18, 19 zur Bestimmung des Abstands der Markierungen auf der Faserstoffbahn 1 und/oder zur Berechnung der Drehgeschwindigkeit von Walzen oder Zylindern ausgestattet, die ihre Daten an einen Steuerungsrechner 20 weiterleiten. Dieser ist wie der Steuerungsrechner 15 mit einer Auswerteeinheit 21 verbunden, in der die Dehnung der Faserstoffbahn 1 in verschiedenen Verfahrensschritten und an unterschiedlichen Stellen im Prozess ihrer Herstellung zurückverfolgt und archiviert wird.The arrangement 9 and the measuring devices 10, 12 and 14 indicate their data a control computer 15 on, which evaluates them. Also an offline of the Machine arranged process unit 16 is connected to measuring units 17, 18, 19 for Determining the distance of the markings on the fibrous web 1 and / or to Calculation of the rotational speed of rollers or cylinders equipped, the forward their data to a control computer 20. This one is like that Control computer 15 connected to an evaluation unit 21, in which the strain the fibrous web 1 in different process steps and at different Traced and archived in the process of their manufacture.

In einer ebenfalls mit Mitteln zur Dehnungsmessung ausgestatteten Papiermaschine (Fig. 2) wird aus einem Stoffauflauf 22 eine Faserstoffsuspension einem Spalt zwischen zwei Sieben 23 und 24 eines Doppelsiebformers 25 zugeführt. Auf dem Radius einer Formierwalze 26 laufen die Siebe 23, 24 keilförmig aufeinander zu und schließen die Faserstoffsuspension zwischen sich ein. Dabei erfolgt eine erste Entwässerung der Faserstoffsuspension, und es bildet sich eine Fasermatte, aus der eine Papierbahn 27 entsteht. Bereits in dem Doppelsiebformer 25 ist eine Anordnung 28 zum Aufbringen von Markierungen auf die Papierbahn 27, insbesondere auf deren Bahnrand, vorhanden.In a likewise equipped with means for strain measurement paper machine (Fig. 2) becomes from a headbox 22 a pulp suspension a gap fed between two wires 23 and 24 of a twin wire former 25. On the Radius of a forming roller 26 run the wires 23, 24 in a wedge shape toward each other and trap the pulp suspension between them. This is a first Dewatering of the pulp suspension, and it forms a fiber mat, from the a paper web 27 is created. Already in the twin-wire former 25 is an arrangement 28 for applying marks on the paper web 27, in particular on the Railway edge, available.

An den Doppelsiebformer 25 schließt sich eine Pressenpartie 29 an. Die Pressenpartie 29 umfasst beispielsweise, wie dargestellt, drei Pressstellen 30, 31, 32. Die ersten beiden Pressstellen 7, 8 bilden eine Tandem-Nipco-Flex-Pressenpartie, in der jeweils eine Walze 33, 34 mit einer Schuhpresswalze 35, 36 zusammenwirkt. Im Bereich der Pressenpartie 29 ist beispielsweise eine erste Messeinrichtung 37 zur Messung des Abstands der von der Anordnung 28 auf die Papierbahn 27 aufgebrachten Markierungen vorhanden. The twin-wire former 25 is followed by a press section 29. The For example, as shown, the press section 29 comprises three pressing stations 30, 31, 32. The first two pressing points 7, 8 form a tandem Nipco Flex press section, in each one roller 33, 34 cooperates with a shoe press roll 35, 36. in the Area of the press section 29, for example, a first measuring device 37 for Measurement of the distance of the arrangement 28 on the paper web 27th applied marks available.

An die Pressenpartie 29 schließt sich eine Umlenkwalzen 38 und Trockenzylinder 39 aufweisende Trockenpartie 40 an, in der ebenfalls die Dehnung der Papierbahn 27 mittels einer Messeinrichtung 41 bestimmt wird.At the press section 29, a guide rollers 38 and drying cylinder 39 closes having drying section 40, in which also the elongation of the paper web 27th By means of a measuring device 41 is determined.

Nach der Trockenpartie 40 wird die Papierbahn 27 zwischen einer Schuhwalze 42 und einer Walze 43 eines als Glättwerk eingesetzten Schuhkalanders 44 hindurchgeführt. Über Umlenkwalzen gelangt die Papierbahn 27 in eine zwei Filmwalzen 45, 46 aufweisende Filmpresse.After the drying section 40, the paper web 27 between a shoe roll 42nd and a roller 43 of a shoe calender 44 used as a calender passed. About guide rollers, the paper web 27 enters a two Film rollers 45, 46 having film press.

Auf jede der beiden Filmwalzen 45, 46 bringt eine Auftragdüse 47 bzw. 48 einen Film einer Streichfarbe im Überschuss auf, der jeweils durch einen Rakelstab 49, 50 abgerakelt wird. Durch die Befeuchtung der Papierbahn 27 ändert sich deren Festigkeit, und die Papierbahn 27 wird gedehnt. Daher kann vorzugsweise auch im Bereich hinter der Filmpresse 47 eine Messeinrichtung 51 vorhanden sein.On each of the two film rollers 45, 46 brings a Auftragsüse 47 and 48 a film a coating color in excess, each by a metering rod 49, 50th is doctored off. By moistening the paper web 27 changes their Strength, and the paper web 27 is stretched. Therefore, preferably also in Area behind the film press 47 a measuring device 51 may be present.

Anschließend wird die Papierbahn 27 durch ein mit Luftdruck arbeitendes Umlenkelement 52 weitergeleitet zu einem Schwebetrockner 53, durch den die Papierbahn 27 beidseitig mittels Wärmestrahlung oder Heißluft getrocknet wird und hinter dem vorzugsweise ebenfalls eine Messeinrichtung 54 zum Messen der Dehnung der Papierbahn 27 installiert ist.Subsequently, the paper web 27 is operated by an air pressure Deflection element 52 forwarded to a floating dryer 53 through which the Paper web 27 is dried on both sides by means of heat radiation or hot air and behind the preferably also a measuring device 54 for measuring the Elongation of the paper web 27 is installed.

Über weitere Umlenkwalzen 55, 56 wird die nun wieder getrocknete Papierbahn 27 zu einem Düsenfeuchter 57 weitergeführt, durch den sie wieder bis zu einem vorgegebenen Feuchtegrad und Feuchtegradienten rückgefeuchtet wird. Nach dem Düsenfeuchter 57 wird die Bahn 27 in einem Kalander 58 geglättet. Die den Kalander 58 verlassende Papierbahn 27 wird dann in einer Wickelmaschine 59 zu einer Papierrolle aufgewickelt. Die Wickelmaschine 59 zum Wickeln der Papierbahn 27 kann auch offline von der Maschine zur Herstellung der Papierbahn 27 aus der Faserstoffsuspension angeordnet sein. Auch hinter dem Düsenfeuchter 57 und/oder hinter dem Kalander 58 sind Messeinrichtungen 60 bzw. 61 zur Dehnungsmessung angeordnet. About further guide rollers 55, 56, the now re-dried paper web 27 is closed a nozzle moisturizer 57 continued through which they again up to a moisture level and moisture gradient is rewetted. After this Nozzle moisturizer 57, the web 27 is smoothed in a calender 58. The calender 58 leaving paper web 27 is then in a winding machine 59 to a Paper roll wound up. The winding machine 59 for winding the paper web 27th can also offline from the machine for making the paper web 27 out of the Be arranged pulp suspension. Also behind the nozzle moistener 57 and / or behind the calender 58 are measuring devices 60 and 61 for strain measurement arranged.

Ebenso lassen sich beispielsweise in Walzen der Filmpresse 47 oder des Kalanders 58 Drehgeber zur Messung der Umfangsgeschwindigkeit der zugehörigen Walzen oder Zylinder einbauen, um die Korrelation zwischen der Umfangsgeschwindigkeit und der Dehnung sowie den Schlupf der Papierbahn 27 feststellen zu können. Alle von den Drehgebern, den Messeinrichtungen 37, 41, 51, 60, 61 sowie von anderen Einrichtungen zur Messung der Geschwindigkeiten der Papierbahn 27 und der Walzen oder Zylinder gemessenen Daten werden einem Steuerungsrechner (vgl. Fig. 1) zugeführt.Likewise, for example, in rolls of the film press 47 or the calender 58 Rotary encoder for measuring the circumferential speed of the associated rollers or cylinder to the correlation between the peripheral speed and to be able to determine the elongation and the slippage of the paper web 27. All from the encoders, the measuring devices 37, 41, 51, 60, 61 as well as others Means for measuring the speeds of the paper web 27 and the Rolling or cylinder measured data are a control computer (see. Fig. 1).

Claims (8)

Maschine zum Herstellen einer Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn aus einer Faserstoffsuspension oder zum Veredeln oder Weiterverarbeiten der Faserstoffbahn (1, 27)
dadurch gekennzeichnet, dass in der Maschine mindestens eine Anordnung (9, 28) zum Aufbringen von mindestens zwei in Längsrichtung voneinander beabstandeten Markierungen auf die Faserstoffbahn (1, 27) und eine in Bahnlaufrichtung der Faserstoffbahn (1, 27) der Anordnung (9, 28) nachgeordnete, insbesondere berührungslose, Messeinrichtung (10; 37, 41, 51, 54, 60, 61) zum Messen des Abstands der Markierungen angebracht ist.Machine for producing a paper, board, tissue or another fibrous web from a pulp suspension or for refining or further processing the fibrous web (1, 27)
characterized in that in the machine at least one arrangement (9, 28) for applying at least two longitudinally spaced apart markings on the fibrous web (1, 27) and in the web running direction of the fibrous web (1, 27) of the arrangement (9, 28 ) downstream, in particular non-contact, measuring device (10; 37, 41, 51, 54, 60, 61) is mounted for measuring the distance of the markings. Maschine nach Anspruch 1,
dadurch gekennzeichnet, dass die Anordnung (28) in einem Siebformer (25) oder in einer Pressenpartie (29) der Maschine zum Herstellen der Faserstoffbahn (27) angeordnet ist.Machine according to claim 1,
characterized in that the arrangement (28) in a Siebformer (25) or in a press section (29) of the machine for producing the fibrous web (27) is arranged. Maschine nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass mindestens ein weiteres Messmittel (12, 14, 17, 18, 19) zum Messen der Länge eines Abschnitts der Faserstoffbahn in der Maschine vorhanden ist.Machine according to claim 1 or 2,
characterized in that at least one further measuring means (12, 14, 17, 18, 19) for measuring the length of a portion of the fibrous web is present in the machine. Maschine nach Anspruch 3,
dadurch gekennzeichnet, dass das weitere Messmittel ein Mittel zur berührungslosen Messung, ein Drehgeber (14), eine Triggereinrichtung, eine an einer Walze angebrachte Messeinrichtung, insbesondere ein Encoder, oder eine Einrichtung zur Messung eines Antriebssignals ist. Machine according to claim 3,
characterized in that the further measuring means is a means for non-contact measurement, a rotary encoder (14), a trigger device, a mounted on a roller measuring device, in particular an encoder, or means for measuring a drive signal. Maschine nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass ein Vergleichsmittel zum Vergleichen der von der Messeinrichtung (10; 37, 41, 51, 54, 60, 61) und von dem weiteren Messmittel (12, 14, 17, 18, 19) gemessenen Messwerte, insbesondere ein Steuerungsrechner (15, 20), vorhanden ist.Machine according to one of claims 1 to 4,
characterized in that a comparison means for comparing the measured values measured by the measuring device (10, 37, 41, 51, 54, 60, 61) and by the further measuring means (12, 14, 17, 18, 19), in particular a control computer ( 15, 20) is present. Maschine nach Anspruch 5,
dadurch gekennzeichnet, dass sie eine Auswerteeinheit (21) zum Auswerten der von dem Vergleichsmittel, insbesondere dem Steuerungsrechner (15, 20), gewonnenen Messwerte über die Dehnung während der Herstellung der Faserstoffbahn (1, 27) und zur Speicherung der gewonnenen Daten umfasst.Machine according to claim 5,
characterized in that it comprises an evaluation unit (21) for evaluating the measured values obtained by the comparison means, in particular the control computer (15, 20), on the strain during the production of the fibrous web (1, 27) and for the storage of the data obtained. Maschine nach Anspruch 6,
dadurch gekennzeichnet, dass die Auswerteeinheit (21) mit einem weiteren Steuerungsrechner (20) verbunden ist, der in einer weiteren, insbesondere auch offline zu der Maschine arbeitenden Prozesseinheit (16) angeordnet oder dieser zugeordnet ist.Machine according to claim 6,
characterized in that the evaluation unit (21) is connected to a further control computer (20) which is arranged in a further, in particular also working offline to the machine processing unit (16) or associated therewith. Maschine nach Anspruch 7,
dadurch gekennzeichnet, dass die Messwerte über die Dehnung bei der Weiterverarbeitung der Faserstoffbahn (1, 27) in zumindest einem nachfolgenden offline Prozessschritt, wie bspw. Kalandrierung und / oder Coaten und / oder Wickeln Berücksichtigung finden.Machine according to claim 7,
characterized in that the measured values on the stretching in the further processing of the fibrous web (1, 27) in at least one subsequent offline process step, such as calendering and / or coating and / or winding are taken into account.
EP05101128A 2004-04-14 2005-02-15 Papermaking machine Not-in-force EP1596002B1 (en)

Applications Claiming Priority (2)

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DE102004018522 2004-04-14
DE102004018522A DE102004018522A1 (en) 2004-04-14 2004-04-14 paper machine

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EP1596002B1 EP1596002B1 (en) 2008-05-07

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Publication number Priority date Publication date Assignee Title
JP5163092B2 (en) * 2007-02-14 2013-03-13 セイコーエプソン株式会社 Linear encoder recording method for ink jet printer
DE102007033394A1 (en) 2007-07-18 2009-01-22 Voith Patent Gmbh Method and system for online determination of at least one elongation property of a running paper or board web
DE102008030340B4 (en) * 2008-06-26 2017-06-08 Siemens Aktiengesellschaft Determination of speed relations between drive groups of a paper machine

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DE4008282A1 (en) * 1990-03-15 1991-09-19 Voith Gmbh J M Web shrinkage of strength measurement - uses equidistant parallel and lateral marks for measurement after process station to show distortion
DE10020143A1 (en) * 1999-04-23 2000-11-09 Valmet Corp Measurement of the movement speed of a longitudinal papermaking/cardboard prodn machine component has spaced trigger/trip units registered by sensor(s) for the actual speed to be computed
US20010020523A1 (en) * 2000-03-07 2001-09-13 Ulrich Begemann Method for manufacturing and converting of paper

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Publication number Priority date Publication date Assignee Title
US6200422B1 (en) * 1999-06-24 2001-03-13 Neles Paper Automation Oy Method and apparatus for controlling a moving paper web
US6909106B2 (en) * 2002-09-17 2005-06-21 Kimberly-Clark Worldwide, Inc. Web velocity-based registration control system

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Publication number Priority date Publication date Assignee Title
DE4008282A1 (en) * 1990-03-15 1991-09-19 Voith Gmbh J M Web shrinkage of strength measurement - uses equidistant parallel and lateral marks for measurement after process station to show distortion
DE10020143A1 (en) * 1999-04-23 2000-11-09 Valmet Corp Measurement of the movement speed of a longitudinal papermaking/cardboard prodn machine component has spaced trigger/trip units registered by sensor(s) for the actual speed to be computed
US20010020523A1 (en) * 2000-03-07 2001-09-13 Ulrich Begemann Method for manufacturing and converting of paper

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US20050274474A1 (en) 2005-12-15
DE502005003946D1 (en) 2008-06-19
EP1596002B1 (en) 2008-05-07
ATE394545T1 (en) 2008-05-15

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