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EP0989235B1 - Web guiding system - Google Patents

Web guiding system Download PDF

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Publication number
EP0989235B1
EP0989235B1 EP99111840A EP99111840A EP0989235B1 EP 0989235 B1 EP0989235 B1 EP 0989235B1 EP 99111840 A EP99111840 A EP 99111840A EP 99111840 A EP99111840 A EP 99111840A EP 0989235 B1 EP0989235 B1 EP 0989235B1
Authority
EP
European Patent Office
Prior art keywords
fibrous web
course
guiding means
elements
transfer area
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.)
Expired - Lifetime
Application number
EP99111840A
Other languages
German (de)
French (fr)
Other versions
EP0989235A1 (en
Inventor
Jürgen Mittag
Albrecht Bauder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0989235A1 publication Critical patent/EP0989235A1/en
Application granted granted Critical
Publication of EP0989235B1 publication Critical patent/EP0989235B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections
    • 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
    • D21F7/04—Paper-break control devices

Definitions

  • the invention relates to a method and the associated device for web guiding, especially in machines for the production and / or finishing of fibrous webs such as Paper, cardboard or tissue webs are used, the fibrous web in one Transfer area between two moving, each on a different side of the Fibrous web arranged elements is passed.
  • a stretcher is for example see document US-A-5 289 007.
  • the controlled web guide at the Passing between two elements is becoming increasingly difficult. This is especially true when if the surfaces of the elements are different, for example if that adopting element has less liability.
  • suction devices are used, which are behind the receiving element are arranged, which of course the air permeability of this Requires element.
  • Another disadvantage is that the energy for generating the Vacuum is not insignificant.
  • the object of the invention is therefore a simple method and the associated one Develop device for web guidance.
  • the object was achieved in that the course of the fibrous web after the transfer area is monitored and an incorrect course is corrected.
  • This means for the Device that at least one sensor, preferably detecting optical signals, the course the fibrous web is detected after the transfer area, the sensor via a Control unit with at least one mechanical positive guidance that it can activate connected is.
  • the mechanical positive control is preferably only after Detection of a wrong course of the fibrous web activated. This not only saves energy, depending on the type of positive control, it also protects the transferring element.
  • the elements have the form of moving belts, felts, sieves or rotating rollers, the device in particular during the transfer between various elements is used.
  • the surface of the belts and rollers can be smooth, perforated, blind drilled or structured.
  • the mechanical positive guidance can be applied to the surface of the transferring Elementally controlled scraper depending on the course of the fibrous web and / or brush and / or compressed air nozzle.
  • the positive guides generally extend across the fibrous web.
  • Each element 3, 4 is assigned at least one optical sensor 6, which is connected to at least one positive control 5 via a control unit 7.
  • FIG. 1 shows the transfer of the fibrous web 1 from the element 3 in the form of a Metal tape to the element 4 in the form of a felt. If sensors 6 detect activated that the fibrous web 1 does not run along with the felt after the transfer area 2 the control unit 7 the mechanical positive guides 5. These positive guides 5 are here as directed towards the transferring surface of the element 3 compressed air nozzle and as behind the absorbing device arranged to take over, permeable to air.
  • FIG. 3 shows the transfer of an element 3 in the form of a Roller on an element 4 in the form of a felt.
  • the activatable positive control 5 is here as Scraper, which is pressed against the surface of the roller if necessary.
  • the sensors 6 and the mechanical positive guides 5 generally extend across the entire width of the fibrous web 1, although it is of course also possible to only an element 3, 4, preferably the receiving element 4 sensors.
  • the various positive guides 5 as required and Surface quality of the elements 3, 4 can be combined with one another. This one too described elements 3, 4 involved in the transfer represent only a selection of many Opportunities.

Landscapes

  • Paper (AREA)
  • Replacement Of Web Rolls (AREA)
  • Advancing Webs (AREA)

Description

Die Erfindung betrifft ein Verfahren sowie die dazugehörige Vorrichtung zur Bahnführung, insbesondere in Maschinen zur Herstellung und/oder Veredelung von Faserstoffbahnen wie Papier-, Karton- oder Tissuebahnen angewendet, wobei die Faserstoffbahn in einem Übergabebereich zwischen zwei mitlaufenden, auf jeweils einer anderen Seite der Faserstoffbahn angeordneten Elementen übergeben wird. Eine derartige Bahrführung ist beispielsweise dem Dokument US-A-5 289 007 zu entnehmen.The invention relates to a method and the associated device for web guiding, especially in machines for the production and / or finishing of fibrous webs such as Paper, cardboard or tissue webs are used, the fibrous web in one Transfer area between two moving, each on a different side of the Fibrous web arranged elements is passed. Such a stretcher is for example see document US-A-5 289 007.

Insbesondere bei hohen Geschwindigkeiten bereitet die kontrollierte Bahnführung bei der Übergabe zwischen zwei Elementen zunehmend Schwierigkeiten. Dies gilt insbesondere dann, wenn die Oberflächen der Elemente verschieden ausgebildet sind, beispielsweise wenn das übernehmende Element eine geringere Haftung aufweist.The controlled web guide at the Passing between two elements is becoming increasingly difficult. This is especially true when if the surfaces of the elements are different, for example if that adopting element has less liability.

Zu diesem Zweck werden verstärkt Saugvorrichtungen eingesetzt, die hinter dem übernehmenden Element angeordnet sind, was natürlich die Luftdurchlässigkeit dieses Elementes voraussetzt. Von Nachteil ist dabei außerdem, daß die Energie zur Erzeugung des Vakuums nicht unerheblich ist.For this purpose, suction devices are used, which are behind the receiving element are arranged, which of course the air permeability of this Requires element. Another disadvantage is that the energy for generating the Vacuum is not insignificant.

Die Aufgabe der Erfindung ist es daher ein einfaches Verfahren sowie die dazugehörige Vorrichtung zur Bahnführung zu entwickeln.The object of the invention is therefore a simple method and the associated one Develop device for web guidance.

Erfindungsgemäß wurde die Aufgabe dadurch gelöst, daß der Verlauf der Faserstoffbahn nach dem Übergabebereich überwacht und ein falscher Verlauf korrigiert wird. Dies bedeutet für die Vorrichtung, daß zumindest ein vorzugsweise optische Signale erfassender Sensor den Verlauf der Faserstoffbahn nach dem Übergabebereich erfaßt, wobei der Sensor über eine Steuereinheit mit zumindest einer, von ihm aktivierbaren mechanischen Zwangsführung verbunden ist. Die mechanische Zwangsführung wird allerdings vorzugsweise nur nach dem Erkennen eines falschen Verlaufs der Faserstoffbahn aktiviert. Dies spart nicht nur Energie, sondern schont je nach Art der Zwangsführung auch das übergebende Element.According to the invention the object was achieved in that the course of the fibrous web after the transfer area is monitored and an incorrect course is corrected. This means for the Device that at least one sensor, preferably detecting optical signals, the course the fibrous web is detected after the transfer area, the sensor via a Control unit with at least one mechanical positive guidance that it can activate connected is. The mechanical positive control is preferably only after Detection of a wrong course of the fibrous web activated. This not only saves energy, depending on the type of positive control, it also protects the transferring element.

Die Elemente haben dabei die Form von mitlaufenden Bändern, Filzen, Sieben oder von rotierenden Walzen, wobei die Vorrichtung insbesondere bei der Übergabe zwischen verschiedenen Elementen eingesetzt wird. Die Oberfläche der Bänder und Walzen kann glatt, perforiert, blindgebohrt oder strukturiert sein. The elements have the form of moving belts, felts, sieves or rotating rollers, the device in particular during the transfer between various elements is used. The surface of the belts and rollers can be smooth, perforated, blind drilled or structured.

Die mechanische Zwangsführung kann dabei als auf die Oberfläche des übergebenden Elementes in Abhängigkeit vom Verlauf der Faserstoffbahn steuerbar einwirkender Schaber und/oder Bürste und/oder Druckluftdüse ausgebildet sein.The mechanical positive guidance can be applied to the surface of the transferring Elementally controlled scraper depending on the course of the fibrous web and / or brush and / or compressed air nozzle.

Es ist für sich allein oder in Kombination auch möglich, daß die mechanische Zwangsführung als auf die Oberfläche des übernehmenden, luftdurchlässigen Elementes steuerbar einwirkende Saugvorrichtung ausgebildet ist. Dies setzt jedoch insbesondere bei Bändern und Walzenmänteln eine Perforation voraus.On its own or in combination, it is also possible for the mechanical positive guidance as acting controllably on the surface of the receiving, air-permeable element Suction device is formed. However, this particularly applies to tapes and Perforation ahead of roller coats.

Die Zwangsführungen erstrecken sich im allgemeinen quer zur Faserstoffbahn.The positive guides generally extend across the fibrous web.

Nachfolgend soll die Erfindung an drei Ausführungsbeispielen näher erläutert werden. In der beigefügten Zeichnung zeigt:

Figur 1:
eine Zwangsführung 5 mit Druckluftdüse und Saugvorrichtung
Figur 2:
eine Zwangsführung 5 mit Bürste und
Figur 3:
eine Zwangsführung 5 mit Schaber.
The invention will be explained in more detail below using three exemplary embodiments. The attached drawing shows:
Figure 1:
a positive control 5 with compressed air nozzle and suction device
Figure 2:
a positive control 5 with brush and
Figure 3:
a positive guidance 5 with scraper.

Allen Beispielen ist gemeinsam, daß der Verlauf der Faserstoffbahn 1 nach dem Übergabebereich 2 zwischen den beiden mitlaufenden Elementen 3 und 4 optisch überwacht und ein falscher Verlauf nach dessen Erkennen über eine mechanische Zwangsführung 5 korrigiert wird. Dabei wird jedem Element 3, 4 zumindest ein optischer Sensor 6 zugeordnet, der über eine Steuereinheit 7 mit wenigstens einer Zwangsführung 5 verbunden ist.All examples have in common that the course of the fibrous web 1 after Transfer area 2 between the two moving elements 3 and 4 is optically monitored and a wrong course after its detection via a mechanical positive guidance 5 is corrected. Each element 3, 4 is assigned at least one optical sensor 6, which is connected to at least one positive control 5 via a control unit 7.

Figur 1 zeigt hierzu die Übergabe der Faserstoffbahn 1 von dem Element 3 in Form eines Metallbandes an das Element 4 in Form eines Filzes. Sollten dabei die Sensoren 6 erkennen, daß die Faserstoffbahn 1 nach dem Übergabebereich 2 nicht mit dem Filz mitläuft, so aktiviert die Steuereinheit 7 die mechanischen Zwangsführungen 5. Diese Zwangsführungen 5 sind hier als auf die übergebende Oberfläche des Elementes 3 gerichtete Druckluftdüse und als hinter dem übemehmenden, luftdurchlässigen Filz angeordnete Saugvorrichtung ausgeführt. FIG. 1 shows the transfer of the fibrous web 1 from the element 3 in the form of a Metal tape to the element 4 in the form of a felt. If sensors 6 detect activated that the fibrous web 1 does not run along with the felt after the transfer area 2 the control unit 7 the mechanical positive guides 5. These positive guides 5 are here as directed towards the transferring surface of the element 3 compressed air nozzle and as behind the absorbing device arranged to take over, permeable to air.

In Figur 2 erfolgt die Übergabe der Faserstoffbahn vom Element 3 in Form eines Bandes an das Element 4 in Form eines Siebes. Falls die Faserstoffbahn 1 nach dem Übergabebereich 2 nicht dem Sieb folgt, erfolgt die Aktivierung der Zwangsführung 5, die hier als Bürste ausgebildet ist. Diese Bürste wird dabei gegen das Band gedrückt und entgegen dessen Laufrichtung angetrieben.In Figure 2, the transfer of the fibrous web from element 3 in the form of a tape to the Element 4 in the form of a sieve. If the fibrous web 1 is not after the transfer area 2 Following the sieve, the positive guidance 5 is activated, which is designed here as a brush. This brush is pressed against the belt and against its direction of travel driven.

Die in Figur 3 dargestellte Anordnung zeigt die Übergabe von einem Element 3 in Form einer Walze an ein Element 4 in Form eines Filzes. Die aktivierbare Zwangsführung 5 ist hier als Schaber ausgeführt, der bei Bedarf gegen die Oberfläche der Walze gedrückt wird.The arrangement shown in Figure 3 shows the transfer of an element 3 in the form of a Roller on an element 4 in the form of a felt. The activatable positive control 5 is here as Scraper, which is pressed against the surface of the roller if necessary.

Die Sensoren 6 sowie die mechanischen Zwangsführungen 5 erstrecken sich im allgemeinen quer über die gesamte Breite der Faserstoffbahn 1, wobei es natürlich auch möglich ist an nur einem Element 3, 4, vorzugsweise dem übernehmenden Element 4 Sensoren vorzusehen. Des weiteren können die verschiedenen Zwangsführungen 5 je nach Bedarf und Oberflächenbeschaffenheit der Elemente 3, 4 miteinander kombiniert werden. Auch die hier beschriebenen, an der Übergabe beteiligten Elemente 3, 4 stellen nur eine Auswahl von vielen Möglichkeiten dar.The sensors 6 and the mechanical positive guides 5 generally extend across the entire width of the fibrous web 1, although it is of course also possible to only an element 3, 4, preferably the receiving element 4 sensors. Of further, the various positive guides 5 as required and Surface quality of the elements 3, 4 can be combined with one another. This one too described elements 3, 4 involved in the transfer represent only a selection of many Opportunities.

Durch die Deaktivierung der Zwangsführungen 5 bei dem richtigen Verlauf der Faserstoffbahn 1 wird im Falle der Druckluftdüsen sowie Saugvorrichtungen erheblich Energie gespart und bezüglich der Bürsten und Schaber die Oberfläche des übergebenden Elementes 3 geschont. Zur Zwangsführung kann ergänzend oder für sich allein auch die elektrostatische Abstoßung bzw. Anziehung ausgenutzt werden.By deactivating the positive guides 5 when the fibrous web 1 runs correctly In the case of compressed air nozzles and suction devices, considerable energy is saved and with respect to the brushes and scrapers the surface of the transferring element 3 is protected. The electrostatic repulsion can also be used as a supplement or as a stand-alone feature or attraction can be exploited.

Claims (8)

  1. Method of guiding a fibrous web, used in particular in machines for the production and/or finishing of fibrous webs (1) such as paper, board or tissue webs, the fibrous web (1) being transferred in a transfer area (2) between two co-running elements (3, 4) in each case arranged on a different side of the fibrous web (1), characterized in that the course of the fibrous web (1) downstream of the transfer area (2) is monitored, and a wrong course is corrected.
  2. Method according to Claim 1, characterized in that the course of the fibrous web (1) is detected optically.
  3. Method according to Claim 1 or 2, characterized in that following the detection of a wrong course of the fibrous web (1), a mechanical forcible guiding means (5) is activated.
  4. Apparatus for implementing the method according to one of the preceding claims, characterized in that at least one sensor (6), preferably detecting optical signals, detects the course of the fibrous web (1) downstream of the transfer area (2), the sensor (6) being connected via a control unit (7) to at least one mechanical forcible guiding means (5) that can be activated by the said sensor.
  5. Apparatus according to Claim 4, characterized in that the mechanical forcible guiding means (5) is constructed as a scraper and/or brush and/or compressed-air nozzle acting in a manner which can be controlled on the surface of the transferring element (3).
  6. Apparatus according to Claim 4 or 5, characterized in that the mechanical forcible guiding means (5) is constructed as a suction device acting in a manner which can be controlled on the surface of the accepting, air-permeable element (4).
  7. Apparatus according to one of Claims 4 to 6, characterized in that the elements (3, 4) have the form of co-running belts, felts, fabrics or of rotating rolls.
  8. Apparatus according to one of Claims 4 to 7, characterized in that the transfer is made between different elements (3, 4).
EP99111840A 1998-09-11 1999-06-19 Web guiding system Expired - Lifetime EP0989235B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19841639A DE19841639A1 (en) 1998-09-11 1998-09-11 Web guide
DE19841639 1998-09-11

Publications (2)

Publication Number Publication Date
EP0989235A1 EP0989235A1 (en) 2000-03-29
EP0989235B1 true EP0989235B1 (en) 2003-04-16

Family

ID=7880652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111840A Expired - Lifetime EP0989235B1 (en) 1998-09-11 1999-06-19 Web guiding system

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EP (1) EP0989235B1 (en)
DE (2) DE19841639A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI119441B (en) * 2007-08-20 2008-11-14 Runtech Systems Oy Method for compensating deformation of a paper web
DE102019203744A1 (en) * 2019-02-07 2020-08-13 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Divider Cover Removal Device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1465284A (en) * 1966-01-25 1967-01-06 Kuesters Eduard Maschf Installation for pushing back torn paper webs in their drive on drums or cylinders as well as papermaking machine provided with said installation or the like
DE1800051C3 (en) * 1967-10-03 1978-05-03 Deutsche Semperit Gmbh, 8000 Muenchen Device for separating two webs of material adhering to one another
DE3744107A1 (en) * 1987-12-24 1989-07-06 Bielomatik Leuze & Co Device for producing transverse lines on webs
US5213653A (en) * 1990-09-05 1993-05-25 Yamaha Hatsudoki Kabushiki Kaisha Waste tape disposing means of tape feeder
DE9103056U1 (en) * 1991-03-14 1991-06-06 J.M. Voith Gmbh, 7920 Heidenheim Device for removing rejects
US5289007A (en) * 1992-05-26 1994-02-22 Beloit Technologies, Inc. Sheet break detector apparatus

Also Published As

Publication number Publication date
EP0989235A1 (en) 2000-03-29
DE19841639A1 (en) 2000-03-16
DE59905045D1 (en) 2003-05-22

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