EP3384086B1 - Device and method for transferring a web within a papermaking machine - Google Patents

Device and method for transferring a web within a papermaking machine Download PDF

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Publication number
EP3384086B1
EP3384086B1 EP16791035.5A EP16791035A EP3384086B1 EP 3384086 B1 EP3384086 B1 EP 3384086B1 EP 16791035 A EP16791035 A EP 16791035A EP 3384086 B1 EP3384086 B1 EP 3384086B1
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EP
European Patent Office
Prior art keywords
web
clothing
paper
treatment unit
running path
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EP16791035.5A
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German (de)
French (fr)
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EP3384086A1 (en
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Frank-Jochen Ott
Richard Horn
Valentin Sofka
Bernd-Uwe Stellner
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP3384086A1 publication Critical patent/EP3384086A1/en
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    • 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
    • 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

Definitions

  • the invention relates to a paper or board machine for producing a web with a first treatment unit and a second treatment unit, the web being transferred from the first treatment unit to the second treatment unit with a circumferential first covering, against which the web lies within a first web travel path which has a circumferential second covering, to which the web is transferred and guided within a second web running path, wherein a deflection roller designed as a suction roller is provided, which is suitable for lifting the web (2) from the first covering and deflecting it in the direction of the second covering, and a web separating element is arranged in the web running direction behind the deflection roller designed as a suction roller.
  • the invention further relates to a method for transferring a web within a paper or board machine from a first treatment unit with a circumferential first clothing, against which the web lies within a first web travel path, to a second treatment unit with a circumferential second clothing, to which the web is handed over and within a second path is guided, wherein a deflection roller designed as a suction roller lifts the web from the first covering and deflects it in the direction of the second covering.
  • Such transfer points in a paper or board machine are known to the person skilled in the art. They can be present both in the wet area and in the dry area, for example in the press, the wire or the dryer section.
  • Deflection rollers designed as suction rollers have been state of the art for many years.
  • the term covering is to be understood to mean dewatering, felt or dryer fabrics: in addition, all paper machine fabrics, referred to in English as fabric, and also be assigned to all types of support bands.
  • the document DE10 2007 024 322 A1 describes a method and a system for transferring a paper or cardboard web into the reject system for concepts with closed web guidance.
  • the web is transferred from a transfer belt to a transfer screen by means of a suction roller and then removed from the transfer screen by a smooth, position-adjustable roller during the transfer process and passed into the pulper.
  • a separating element designed as a tip cutter for producing a longitudinal cut in the web is also disclosed.
  • a press section is designated as a whole by the number 10.
  • a paper web 64 is removed from a wire 14 of an upstream wire section 12, which is guided over wire guide rollers 16, 18, by a deflection roller or pick-up roller 32 with suction support and reaches a press nip 34 on an upper felt 30.
  • the upper felt 30 is guided upwards by a felt guide roller 40.
  • a bottom felt 42 is also passed through the press nip 34 and is guided over felt guide rollers 44, 46 and 48.
  • the paper web 64 is transferred to a drying wire 58 by means of a suction roller 60 and transferred in the direction of arrow 62 to a downstream drying section.
  • a plurality of press nips can also be provided in succession. Seen in the web running direction behind the press nip 34 and behind the Suction roller 60, with which the paper web 64 is transferred to the dryer fabric 58, a device is provided on the inside of the bottom felt 42, which is designated as a whole by the number 20.
  • the device 20 comprises a blowing device in the form of a blow box 22, which is arranged in front of the subsequent felt guide roller 46 and has a slot-like blow-out opening 24, through which compressed air can be blown through the bottom felt 42, to remove paper web residues when the paper machine starts up or in the event of a web break stand out from underfelt 42 and in the direction of arrows 28 into one below arranged pulper 54 to discharge, as indicated by the web mark denoted by the number 56.
  • a blowing device in the form of a blow box 22, which is arranged in front of the subsequent felt guide roller 46 and has a slot-like blow-out opening 24, through which compressed air can be blown through the bottom felt 42, to remove paper web residues when the paper machine starts up or in the event of a web break stand out from underfelt 42 and in the direction of arrows 28 into one below arranged pulper 54 to discharge, as indicated by the web mark denoted by the number 56.
  • the suction roller 60 can be pivoted and can thus be pivoted up to the bottom felt 42 in order to then transfer the paper web onto the drying wire 58 with suction support.
  • the suction roller 60 is thus in a position pivoted to the bottom felt 42, so that the paper web is transferred directly to the dryer fabric 58.
  • the object is achieved in that the web separating element is arranged between 200 and 600 mm in the web running direction of the first web running path behind the deflection roller designed as a suction roller and that the web separating element is formed by a blade with a cutting edge facing the first covering is.
  • this web separating element causes the web which has been torn up again and which is already on the first web path, for example, in the direction Pulper had found, is separated and is not taken on the second path. It has been found that the web can be moved when changing from the first to the second web running path in such a way that the web run is guided over the web separating element and the web is forcibly separated there. The result of this is that only a very short end of the new web start, if folded, is diverted to the second web path. This very short twist has no negative impact on the forwarding function.
  • the web separating element is arranged between 200 and 600 mm behind the suction roll in the web running direction of the first web running path.
  • the web separating element is formed by a blade with a cutting edge facing the first covering.
  • a blade takes up the least space here and is a particularly inexpensive component. When placed in the right place, the blade doesn't even require movement when cutting the web. It can be permanently installed because the web is guided and cut over it during the deflection process.
  • the blade can have a smooth or serrated edge. It has often been shown that a curved or oblique cutting edge can also be useful, because the deflected path, which can be up to 10 m wide, can be used in this way Web comes into contact with a web separating element and is shared by this.
  • the web running on the first web running path is therefore diverted to the second web running path with the aid of the deflection roller designed as a suction roller.
  • the web section that has already advanced on the first web running path, for example in the direction of the pulper, is pulled up again and experiences a cut through its contact with the web separating element, preferably over the entire web width.
  • the web is preferably guided on the first web path if it has to be diverted down into the pulper. This is the case if the web only has to be listed and cut wide or if the web has torn in front of the transfer point. As a result, the web trailing at a speed of up to 2000 m / min does not collect in the paper machine unit and does not have to be removed in a complicated manner.
  • the web is usually deflected upwards and continued on the second web travel path.
  • Figure 1 , Figure 2a and Figure 2b use the same reference numerals for the same components.
  • Figure 1 The representation of the transfer device according to the invention can, however, be explained more easily if one first of all uses the status quo of such a transfer device without the presence of the features essential to the invention Figures 2a and 2b clarifies.
  • a first covering 8 guided through two guide rollers 21 can be seen.
  • it is, for example, a felt that rotates around the felt guide rollers 21.
  • the web 2 lying on the covering 8 moves on the first web path 15 from a first treatment unit 13, e.g. B. the press section, coming and is delivered below to the pulper, not shown.
  • This web travel path 15 is provided for the web 2 if, for example, faults have occurred in the first treatment unit 13 or if the web 2 is newly listed and must first be cut wide before being forwarded.
  • a deflection roller 7 designed as a suction roller is provided.
  • Figure 2b now shows how the deflection roller 7, which is designed as a suction roller, can be pivoted at web speed in rotation onto the web 2 supported by the first covering.
  • the deflection roller 7 which is designed as a suction roller, can be pivoted at web speed in rotation onto the web 2 supported by the first covering.
  • the web 2 is deflected in the direction of the second covering 9. It is planned that the web breaks at this moment, so that a new start of the web takes up the path of the second web path 17. But that doesn't always work properly. Rather is in Figure 2b shown what it looks like when the web does not tear completely and pulls up the part of the web that was already traveling in the direction of Pulper and takes it along on the second web running path in the direction of the second treatment unit, for example the dryer section. This can lead to significant disruptions.
  • a web separating element 4 is provided shortly behind the deflection roller 7 designed as a suction roller.
  • the deflection roller 7 designed as a suction roller.
  • it is a web-wide blade 4 'with a cutting edge facing the first covering 8.
  • the blade 4 ' is arranged perpendicular to it at a distance of 15-40 mm from the covering.
  • a distance of 200 to 600 mm behind the deflection roller 7 designed as a suction roller has proven to be advantageous for the web separating element 4.
  • the web 2 runs behind the blade after a short support by the covering 8 in the pulper 19.

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

Description

Die Erfindung betrifft eine Papier- oder Kartonmaschine zur Herstellung einer Bahn mit einer ersten Behandlungseinheit und einer zweiten Behandlungseinheit, wobei die Bahn von der ersten Behandlungseinheit mit einer umlaufenden ersten Bespannung, an der die Bahn innerhalb eines ersten Bahnlaufpfades anliegt, zu der zweiten Behandlungseinheit übergeben wird, welche eine umlaufende zweiten Bespannung aufweist, an die die Bahn übergeben wird und innerhalb eines zweiten Bahnlaufpfades geführt wird,
wobei eine als Saugwalze ausgebildete Umlenkwalze vorgesehen ist, die geeignet ist, die Bahn (2) von der ersten Bespannung abzuheben und in Richtung der zweiten Bespannung umzulenken und in Bahnlaufrichtung hinter der als Saugwalze ausgebildeten Umlenkwalze ein Bahntrennelement angeordnet ist.The invention relates to a paper or board machine for producing a web with a first treatment unit and a second treatment unit, the web being transferred from the first treatment unit to the second treatment unit with a circumferential first covering, against which the web lies within a first web travel path which has a circumferential second covering, to which the web is transferred and guided within a second web running path,
wherein a deflection roller designed as a suction roller is provided, which is suitable for lifting the web (2) from the first covering and deflecting it in the direction of the second covering, and a web separating element is arranged in the web running direction behind the deflection roller designed as a suction roller.

Die Erfindung betrifft ferner ein Verfahren zur Übergabe einer Bahn innerhalb einer Papier- oder Kartonmaschine von einer ersten Behandlungseinheit mit einer umlaufenden ersten Bespannung, an der die Bahn innerhalb eines ersten Bahnlaufpfades anliegt, zu einer zweiten Behandlungseinheit mit einer umlaufenden zweiten Bespannung, an die die Bahn übergeben wird und innerhalb eines zweiten Bahnlaufpfades geführt wird, wobei eine als Saugwalze ausgebildete Umlenkwalze die Bahn von der ersten Bespannung abhebt und in Richtung der zweiten Bespannung umlenkt.The invention further relates to a method for transferring a web within a paper or board machine from a first treatment unit with a circumferential first clothing, against which the web lies within a first web travel path, to a second treatment unit with a circumferential second clothing, to which the web is handed over and within a second path is guided, wherein a deflection roller designed as a suction roller lifts the web from the first covering and deflects it in the direction of the second covering.

Derartige Übergabestellen in einer Papier- oder Kartonmaschine sind dem Fachmann bekannt. Sie können sowohl im Nassbereich als auch im Trockenbereich vorhanden sein, also beispielsweise in der Pressen-, der Sieb- oder der Trockenpartie. Als Saugwalze ausgebildete Umlenkwalzen sind seit vielen Jahren Stand der Technik. Unter dem Begriff Bespannung sind Entwässerungs-, Filz- oder Trockensiebe zu verstehen: Außerdem sollen ihm im Rahmen dieser Anmeldung alle Papiermaschinengewebe, im Englischen als fabric bezeichnet, und auch alle Arten von Stützbändern zugeordnet sein.Such transfer points in a paper or board machine are known to the person skilled in the art. They can be present both in the wet area and in the dry area, for example in the press, the wire or the dryer section. Deflection rollers designed as suction rollers have been state of the art for many years. The term covering is to be understood to mean dewatering, felt or dryer fabrics: in addition, all paper machine fabrics, referred to in English as fabric, and also be assigned to all types of support bands.

Das Dokument DE10 2007 024 322 A1 beschreibt ein Verfahren und eine Anlage zum Überführen einer Papier- oder Kartonbahn ins Ausschusssystem bei Konzepten mit geschlossener Bahnführung. Beispielsweise wird die Bahn von einem Transferband auf ein Transfersieb mittels einer Saugwalze übergeben und anschließend während des Überführvorganges durch eine glatte, positionsverstellbare Walze vom Transfersieb abgenommen und in den Pulper geleitet. Ebenso ist ein als Spitzenschneider ausgeführtes Trennelement zur Erzeugung eines Längsschnittes in der Bahn offenbart.The document DE10 2007 024 322 A1 describes a method and a system for transferring a paper or cardboard web into the reject system for concepts with closed web guidance. For example, the web is transferred from a transfer belt to a transfer screen by means of a suction roller and then removed from the transfer screen by a smooth, position-adjustable roller during the transfer process and passed into the pulper. A separating element designed as a tip cutter for producing a longitudinal cut in the web is also disclosed.

Beispielhaft sei hier als Stand der Technik die DE 196 36 791 A1 genannt, deren Figur 1 zur besseren Darstellung des Standes der Technik innerhalb dieser Anmeldung in Fig. 3 erneut aufgenommen worden ist. In dieser Fig. 3 ist eine Pressenpartie insgesamt mit der Ziffer 10 bezeichnet. Eine Papierbahn 64 wird von einem Sieb 14 einer vorgeordneten Siebpartie 12, das über Siebleitwalzen 16, 18 geführt ist, durch eine Umlenkwalze oder Pickup-Walze 32 mit Saugunterstützung abgenommen und gelangt auf einem Oberfilz 30 zu einem Pressspalt 34.
Der Oberfilz 30 wird nach Austritt aus dem Pressspalt 34 von einer Filzleitwalze 40 nach oben weggeführt.
Durch den Pressspalt 34 ist ferner ein Unterfilz 42 geführt, der über Filzleitwalzen 44, 46 und 48 geführt ist. Nach dem Pressspalt 34 wird die Papierbahn 64 auf ein Trockensieb 58 mittels einer Saugwalze 60 übernommen und in Richtung des Pfeiles 62 in eine nachgeordnete Trockenpartie überführt.
Es versteht sich, dass je nach Auslegung der Papiermaschine auch mehrere Pressspalte hintereinander vorgesehen sein können.
In Bahnlaufrichtung gesehen hinter dem Pressspalt 34 und hinter der Saugwalze 60, mit der die Papierbahn 64 auf das Trockensieb 58 überführt wird, ist an der Innenseite des Unterfilzes 42 eine Vorrichtung vorgesehen, die insgesamt mit der Ziffer 20 bezeichnet ist. Die Vorrichtung 20 umfasst eine Blaseinrichtung in Form eines Blaskastens 22, der vor der nachfolgenden Filzleitwalze 46 angeordnet ist und eine schlitzartige Ausblasöffnung 24 aufweist, über die Druckluft durch den Unterfilz 42 geblasen werden kann, um Papierbahnreste bei einem Anfahren der Papiermaschine oder im Falle eines Bahnabrisses vom Unterfilz 42 abzuheben und in Richtung der Pfeile 28 in einen darunter angeordneten Pulper 54 abzuführen, wie durch den mit der Ziffer 56 bezeichneten Bahnabschlag angedeutet ist.The state of the art is exemplary here DE 196 36 791 A1 called whose Figure 1 to better illustrate the state of the art within this application in Fig. 3 has been resumed. In this Fig. 3 a press section is designated as a whole by the number 10. A paper web 64 is removed from a wire 14 of an upstream wire section 12, which is guided over wire guide rollers 16, 18, by a deflection roller or pick-up roller 32 with suction support and reaches a press nip 34 on an upper felt 30.
After leaving the press nip 34, the upper felt 30 is guided upwards by a felt guide roller 40.
A bottom felt 42 is also passed through the press nip 34 and is guided over felt guide rollers 44, 46 and 48. After the press nip 34, the paper web 64 is transferred to a drying wire 58 by means of a suction roller 60 and transferred in the direction of arrow 62 to a downstream drying section.
It goes without saying that, depending on the design of the paper machine, a plurality of press nips can also be provided in succession.
Seen in the web running direction behind the press nip 34 and behind the Suction roller 60, with which the paper web 64 is transferred to the dryer fabric 58, a device is provided on the inside of the bottom felt 42, which is designated as a whole by the number 20. The device 20 comprises a blowing device in the form of a blow box 22, which is arranged in front of the subsequent felt guide roller 46 and has a slot-like blow-out opening 24, through which compressed air can be blown through the bottom felt 42, to remove paper web residues when the paper machine starts up or in the event of a web break stand out from underfelt 42 and in the direction of arrows 28 into one below arranged pulper 54 to discharge, as indicated by the web mark denoted by the number 56.

Die Saugwalze 60 ist verschwenkbar, und kann somit bis an den Unterfilz 42 herangeschwenkt werden, um dann mit Saugunterstützung die Papierbahn auf das Trockensieb 58 überzuleiten.The suction roller 60 can be pivoted and can thus be pivoted up to the bottom felt 42 in order to then transfer the paper web onto the drying wire 58 with suction support.

Während des Produktionsbetriebes befindet sich also die Saugwalze 60 in einer an dem Unterfilz 42 angeschwenkten Position, so dass die Papierbahn unmittelbar auf das Trockensieb 58 übergeben wird.During the production operation, the suction roller 60 is thus in a position pivoted to the bottom felt 42, so that the paper web is transferred directly to the dryer fabric 58.

Es hat sich jedoch herausgestellt, dass die Vorrichtung der DE 196 36 791 A1 zwar gut funktioniert, dass es bisweilen aber dazu kommt, dass die Bahn bei der Umleitung auf das Trockensieb - in dieser Anmeldung "zweite Bespannung" genannt - nicht immer ordnungsgemäß abreißt oder durch die Blaseinrichtung getrennt wird. Das bedeutet, dass der vorgesehene Bahnabschlag, der eigentlich auf dem ersten Bahnlaufpfad in den Pulper abwandern sollte, wieder mit nach oben in den zweiten Bahnlaufpfad gezogen wird, und dabei zu Problemen führt. Es können sich Papierfetzen oder größere Verdickungen bilden, die zu einem Abriss der Bahn führen.However, it has been found that the device of DE 196 36 791 A1 works well, but sometimes it happens that the web does not always tear off properly or is separated by the blowing device when it is diverted to the dryer fabric - referred to in this application as "second clothing". This means that the intended web discount, which should actually migrate into the pulper on the first web running path, is again pulled upwards into the second web running path, and this leads to problems. Scraps of paper or larger thickening can form, which can tear the web.

Es ist die Aufgabe der Erfindung, den Übergang der Bahn von dem ersten Bahnlaufpfad auf den zweiten Bahnlaufpfad funktionssicherer zu machen.It is the object of the invention to make the transition of the web from the first web running path to the second web running path more reliable.

In Hinblick auf die genannte Vorrichtung wird die Aufgabe nach Anspruch 1dadurch gelöst, dass das Bahntrennelement zwischen 200 und 600 mm in Bahnlaufrichtung des ersten Bahnlaufpfades hinter der als Saugwalze ausgebildeten Umlenkwalze angeordnet ist und dass das Bahntrennelement durch eine Klinge mit einer der ersten Bespannung zugewandten Schneide gebildet ist.With regard to the device mentioned, the object is achieved in that the web separating element is arranged between 200 and 600 mm in the web running direction of the first web running path behind the deflection roller designed as a suction roller and that the web separating element is formed by a blade with a cutting edge facing the first covering is.

Dieses Bahntrennelement bewirkt bei der Aktivierung der als Saugwalze ausgebildeten Umlenkwalze, dass die wieder hochgerissene Bahn, die sich auf dem ersten Bahnlaufpfad beispielsweise bereits in Richtung Pulper befunden hatte, abgetrennt wird und nicht auf den zweiten Bahnlaufpfad mitgenommen wird. Es hat sich herausgestellt, dass die Bahn beim Wechsel vom ersten auf den zweiten Bahnlaufpfad so bewegt werden kann, dass der Bahnablauf über das Bahntrennelement geführt wird und die Bahn dort zwangsweise getrennt wird. Dies hat zur Folge, dass nur ein sehr kurzes Ende des neuen Bahnanfangs gegebenenfalls gefaltet auf den zweiten Bahnlaufpfad umgeleitetet wird. Diese sehr kurze Umknickung hat aber keinen negativen Einfluss auf die Funktion der Weiterleitung.When the deflection roller designed as a suction roller is activated, this web separating element causes the web which has been torn up again and which is already on the first web path, for example, in the direction Pulper had found, is separated and is not taken on the second path. It has been found that the web can be moved when changing from the first to the second web running path in such a way that the web run is guided over the web separating element and the web is forcibly separated there. The result of this is that only a very short end of the new web start, if folded, is diverted to the second web path. This very short twist has no negative impact on the forwarding function.

Um die maximale Bahnumknicklänge möglichst gering zu halten wird das Bahntrennelement zwischen 200 und 600 mm in Bahnlaufrichtung des ersten Bahnlaufpfades hinter der Saugwalze angeordnet.In order to keep the maximum web bending length as small as possible, the web separating element is arranged between 200 and 600 mm behind the suction roll in the web running direction of the first web running path.

Damit ist ein Kompromiss gefunden worden, der einerseits ausreichend Raum zum Verschwenken der Saugwalze gibt und andererseits das getrennte Bahnende, bzw. den neuen Bahnanfang für den zweiten Bahnlaufpfad so kurz wie möglich hält.A compromise has thus been found which, on the one hand, gives sufficient space for pivoting the suction roll and, on the other hand, keeps the separated web end or the new web start for the second web path as short as possible.

Das Bahntrennelement wird durch eine Klinge mit einer der ersten Bespannung zugewandten Schneide gebildet.The web separating element is formed by a blade with a cutting edge facing the first covering.

Eine Klinge nimmt hier den geringsten Raum ein und ist ein besonders kostengünstiges Bauteil. An der richtigen Stelle angebracht, erfordert die Klinge nicht einmal eine Bewegung beim Schnitt der Bahn. Sie kann fest montiert sein, weil die Bahn während des Umlenkprozesses darüber geführt und geschnitten wird. Dabei kann die Klinge eine glatte oder auch gezackte Schneide besitzen. Vielfach hat sich gezeigt, dass auch eine gekrümmte oder schräge Schneide sinnvoll sein kann, weil die umgelenkte Bahn, die bis zu 10 m Breite breit sein kann, auf diese Weise Bahn mit einem Bahntrennelement in Kontakt kommt und von diesem geteilt wird.A blade takes up the least space here and is a particularly inexpensive component. When placed in the right place, the blade doesn't even require movement when cutting the web. It can be permanently installed because the web is guided and cut over it during the deflection process. The blade can have a smooth or serrated edge. It has often been shown that a curved or oblique cutting edge can also be useful, because the deflected path, which can be up to 10 m wide, can be used in this way Web comes into contact with a web separating element and is shared by this.

Man leitet also die auf dem ersten Bahnlaufpfad laufende Bahn mit Hilfe der als Saugwalze ausgebildeten Umlenkwalze auf den zweiten Bahnlaufpfad um. Der bereits auf dem ersten Bahnlaufpfad beispielsweise in Richtung Pulper vorgeeilte Bahnabschnitt wird wieder hochgezogen und erfährt durch seinen Kontakt mit dem Bahntrennelement einen Schnitt, vorzugsweise über die ganze Bahnbreite. Diese erfinderische Vorgehensweise ist überraschend einfach.The web running on the first web running path is therefore diverted to the second web running path with the aid of the deflection roller designed as a suction roller. The web section that has already advanced on the first web running path, for example in the direction of the pulper, is pulled up again and experiences a cut through its contact with the web separating element, preferably over the entire web width. This inventive procedure is surprisingly simple.

Wie bereits bei den Vorrichtungsansprüchen erläutert reicht es, bei diesem Verfahren das Bahntrennelement vorzugsweise durch eine einfache, bevorzugt feststehende Klinge auszubilden.As already explained in the device claims, it is sufficient in this method to form the web separating element preferably by means of a simple, preferably fixed blade.

Bei dem Verfahren wird die Bahn vorzugsweise auf dem ersten Bahnlaufpfad geführt, wenn sie nach unten in den Pulper abgeleitet werden muss. Dies ist der Fall, wenn die Bahn nur aufgeführt und breit geschnitten werden muss oder wenn die Bahn vor der Übergabestelle gerissen ist. Dadurch sammelt sich nicht die mit einer Geschwindigkeit von bis zu 2000 m/min nachlaufende Bahn in der Papiermaschineneinheit und muss nicht auf umständliche Weise wieder entfernt werden.In the method, the web is preferably guided on the first web path if it has to be diverted down into the pulper. This is the case if the web only has to be listed and cut wide or if the web has torn in front of the transfer point. As a result, the web trailing at a speed of up to 2000 m / min does not collect in the paper machine unit and does not have to be removed in a complicated manner.

Während eines Produktionsprozesses der Papiermaschineneinheit wird die Bahn in der Regel nach oben umgelenkt und über den zweiten Bahnlaufpfad weiter geführt.During a production process of the paper machine unit, the web is usually deflected upwards and continued on the second web travel path.

Die Erfindung wird im Folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen näher erläutert. In diesen zeigt

  • Figur 1 eine schematische Seitenansicht einer erfindungsgemäßen Papier- oder Kartonmaschine mit einer Vorrichtung zur Übergabe einer Bahn,
  • Figur 2 a und 2b zwei schematische Seitenansichten einer Papier- oder Kartonmaschine mit einer Vorrichtung zur Übergabe einer Bahn zum Zweck der Darstellung dessen, was passieren würde, wenn die erfindungsgemäßen kennzeichnenden Merkmale nicht vorhanden wären,
  • Figur 3 eine Darstellung des Standes der Technik für den beschreibenden Teil des Standes der Technik.
The invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawings. In these shows
  • Figure 1 2 shows a schematic side view of a paper or board machine according to the invention with a device for transferring a web,
  • Figure 2 a and 2b are two schematic side views of a paper or board machine with a device for transferring a web for the purpose of illustrating what would happen if the characteristic features according to the invention were not present,
  • Figure 3 a representation of the prior art for the descriptive part of the prior art.

Figur 1, Figur 2a und Figur 2b verwenden die gleichen Bezugszeichen für die gleichen Bauteile. Figur 1, die Darstellung der erfindungsgemäßen Übergabevorrichtung, lässt sich allerdings leichter erklären, wenn man zunächst den Status Quo einer solchen Übergabevorrichtung ohne das Vorhandensein der erfindungswesentlichen Merkmale anhand der Figuren 2a und 2b verdeutlicht. Figure 1 , Figure 2a and Figure 2b use the same reference numerals for the same components. Figure 1 The representation of the transfer device according to the invention can, however, be explained more easily if one first of all uses the status quo of such a transfer device without the presence of the features essential to the invention Figures 2a and 2b clarifies.

In Figur 2a erkennt man auf der rechten Seite eine durch zwei Leitwalzen 21 geführte erste Bespannung 8. In diesem Fall handelt es sich beispielsweise um einen Filz, der Filzleitwalzen 21 umläuft. Die auf der Bespannung 8 liegende Bahn 2 bewegt sich auf dem ersten Bahnlaufpfad 15 von einer ersten Behandlungseinheit 13, z. B. der Pressenpartie, kommend und wird unten an den nicht dargestellten Pulper abgegeben. Dieser Bahnlaufpfad 15 ist für die Bahn 2 vorgesehen, wenn es beispielsweise zu Störungen in der ersten Behandlungseinheit 13 gekommen ist oder wenn die Bahn 2 neu aufgeführt wird und vor der Weiterleitung zunächst breit geschnitten werden muss.In Figure 2a On the right-hand side, a first covering 8 guided through two guide rollers 21 can be seen. In this case, it is, for example, a felt that rotates around the felt guide rollers 21. The web 2 lying on the covering 8 moves on the first web path 15 from a first treatment unit 13, e.g. B. the press section, coming and is delivered below to the pulper, not shown. This web travel path 15 is provided for the web 2 if, for example, faults have occurred in the first treatment unit 13 or if the web 2 is newly listed and must first be cut wide before being forwarded.

Um die Bahn an eine Bespannung 9, beispielsweise ein Trockensieb, umzulenken und abzugeben, ist eine als Saugwalze ausgebildete Umlenkwalze 7 vorgesehen.In order to deflect and deliver the web to a fabric 9, for example a dryer fabric, a deflection roller 7 designed as a suction roller is provided.

Figur 2b zeigt nun, wie die als Saugwalze ausgebildete Umlenkwalze 7 mit Bahngeschwindigkeit rotierend auf die von der ersten Bespannung abgestützte Bahn 2 anschwenkbar ist. Sobald der Unterdruck aktiviert ist, wird die Bahn 2 in Richtung der zweiten Bespannung 9 umgelenkt. Dabei ist es geplant, dass die Bahn in diesem Moment reißt, so dass ein neuer Bahnanfang den Weg des zweiten Bahnlaufpfades 17 aufnimmt. Das funktioniert aber nicht immer ordnungsgemäß. Vielmehr ist in Figur 2b dargestellt, wie es aussieht, wenn die Bahn nicht vollständig reißt und den Teil der Bahn, der bereits in Richtung Pulper unterwegs war, wieder hochzieht und mit auf den zweiten Bahnlaufpfad in Richtung zweiter Behandlungseinheit, beispielsweise der Trockenpartie, mitnimmt. Dies kann zu erheblichen Störungen führen. Figure 2b now shows how the deflection roller 7, which is designed as a suction roller, can be pivoted at web speed in rotation onto the web 2 supported by the first covering. As soon as the negative pressure is activated, the web 2 is deflected in the direction of the second covering 9. It is planned that the web breaks at this moment, so that a new start of the web takes up the path of the second web path 17. But that doesn't always work properly. Rather is in Figure 2b shown what it looks like when the web does not tear completely and pulls up the part of the web that was already traveling in the direction of Pulper and takes it along on the second web running path in the direction of the second treatment unit, for example the dryer section. This can lead to significant disruptions.

Deshalb ist die erfindungsgemäße Lösung, dargestellt in Figur 1, vorgesehen. In Bahnlaufrichtung des ersten Bahnlaufpfades 15 ist kurz hinter der als Saugwalze ausgebildeten Umlenkwalze 7 ein Bahntrennelement 4 vorgesehen. In diesem Ausführungsbeispiel handelt es sich um eine bahnbreite Klinge 4' mit einer der ersten Bespannung 8 zugewandten Schneide. Die Klinge 4' ist in einem Abstand von 15 - 40 mm von der Bespannung senkrecht dazu angeordnet. Ein Abstand von 200 bis 600 mm hinter der als Saugwalze ausgebildeten Umlenkwalze 7 hat sich für das Bahntrennelement 4 als vorteilhaft erwiesen. Hinter der Klinge läuft die Bahn 2 nach noch kurzer Unterstützung durch die Bespannung 8 in den Pulper 19.Therefore, the solution according to the invention is shown in Figure 1 , intended. In the web running direction of the first web running path 15, a web separating element 4 is provided shortly behind the deflection roller 7 designed as a suction roller. In this exemplary embodiment, it is a web-wide blade 4 'with a cutting edge facing the first covering 8. The blade 4 'is arranged perpendicular to it at a distance of 15-40 mm from the covering. A distance of 200 to 600 mm behind the deflection roller 7 designed as a suction roller has proven to be advantageous for the web separating element 4. The web 2 runs behind the blade after a short support by the covering 8 in the pulper 19.

Wird die Bahn 2 nun, wie bereits bei der Beschreibung der Figuren 2a und 2b erläutert mit Hilfe der als Saugwalze ausgebildeten Umlenkwalze 7 auf den zweiten Bahnlaufpfad 17 umdirigiert, so kommt die Bahn unmittelbar mit der Klinge 4' in Kontakt und wird getrennt.If the web 2 now, as already in the description of Figures 2a and 2b explained with the aid of the deflection roller 7 designed as a suction roller, redirected to the second web travel path 17, the web comes into direct contact with the blade 4 'and is separated.

BezugszeichenlisteReference symbol list

  • 1 Papier- oder Kartonmaschine mit einer Vorrichtung zur Übergabe einer Bahn1 paper or board machine with a device for transferring a web
  • 2 Bahn2 lanes
  • 3 zurückgeführte Bahn3 returned path
  • 4 Bahntrennelement4 web separating element
  • 4' Klinge4 'blade
  • 5 Bahnabschlag5 tees
  • 6 Halterung6 bracket
  • 6' Spritzwand6 'bulkhead
  • 7 als Saugwalze ausgebildeten Umlenkwalze7 deflection roller designed as a suction roller
  • 8 erste Bespannung, Filz8 first covering, felt
  • 9 zweite Bespannung, Trockensieb9 second covering, dryer fabric
  • 11 erste Behandlungseinheit (z. B. Pressenpartie)11 first treatment unit (e.g. press section)
  • 13 zweite Behandlungseinheit (z. B. Trockenpartie)13 second treatment unit (e.g. dryer section)
  • 15 erster Bahnlaufpfad15 first web running path
  • 17 zweiter Bahnlaufpfad17 second path
  • 19 Pulper19 pulper
  • 21 Leitwalze
    Stand der Technik in Fig. 3 gemäß DE 196 36 791 A1     21 guide roller
    State of the art in Fig. 3 according to DE 196 36 791 A1
  • 10 Papiermaschineneinheit, z. B. Pressenpartie10 paper machine unit, e.g. B. press section
  • 12 Siebpartie12 screen section
  • 14 Sieb14 sieve
  • 16 Siebleitwalze16 wire guide roller
  • 18 Siebleitwalze18 wire guide roller
  • 20 Vorrichtung20 device
  • 22 Blaskasten22 blow box
  • 24 Ausblasöffnung24 outlet opening
  • 30 Oberfilz30 top felt

Claims (9)

  1. Paper or cardboard machine for producing a web, having a first treatment unit (11) and a second treatment unit (13), wherein the web from the first treatment unit (11) having a revolving first clothing (8) on which the web (2) bears within a first web running path (15) is transferred to the second treatment unit (13) which has a revolving second clothing (9) to which the web (2) is transferred and guided within a second web running path (17),
    wherein a deflection roller (7) which is configured as a suction roller and which is suitable for lifting the web (2) from the first clothing (8) and deflecting said web (2) in the direction of the second clothing (9) is provided, wherein a web separation element in the web running direction is disposed behind the deflection roller which is configured as a suction roller,
    characterized in that
    the web separation element (4) in the web running direction of the first web running path (15) is disposed between 200 and 600 mm behind the deflection roller (7) which is configured as a suction roller, and in that the web separation element (4) is formed by a blade (4') having a cutting edge which faces the first clothing (8).
  2. Paper or cardboard machine according to Claim 1,
    characterized in that the spacing of the blade (4') from the first clothing (8) is 15 to 40 mm.
  3. Paper or cardboard machine according to one of Claims 1 or 2, characterized in that the mounting (6) on which the blade is assembled comprises an anti-splash wall (6').
  4. Paper or cardboard machine according to Claim 3,
    characterized in that the blade (4') is assembled so as to be interchangeable on the mounting (6).
  5. Method for transferring a web (2) within a paper or cardboard machine from a first treatment unit (11) having a revolving first clothing (8) on which the web (2) bears within a first web running path (15) to a second treatment unit (13) having a revolving second clothing (9) to which the web (2) is transferred and guided within a second web running path (17),
    wherein a deflection roller (7) which is configured as a suction roller lifts the web (2) from the first clothing (8) and deflects said web (2) in the direction of the second clothing (9),
    characterized in that
    the web (2) on account of said deflection comes into contact with a web separation element (4) and is divided by the latter.
  6. Method according to Claim 5, characterized in that the web separation element (4) cuts the web (2) in two across the entire width.
  7. Method according to one of Claims 5 to 6,
    characterized in that the web separation element (4) is formed by a blade (4').
  8. Method according to one of Claims 5 to 7,
    characterized in that the web uses the first web running path (15) in particular during a start-up procedure of the paper machine unit or in the event of a torn web.
  9. Method according to one of Claims 5 to 8,
    characterized in that the web uses the second web running path (17) during a production process of the paper machine unit.
EP16791035.5A 2015-12-04 2016-11-07 Device and method for transferring a web within a papermaking machine Active EP3384086B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015224280.3A DE102015224280A1 (en) 2015-12-04 2015-12-04 Apparatus and method for transferring a web within a paper machine
PCT/EP2016/076771 WO2017092969A1 (en) 2015-12-04 2016-11-07 Device and method for transferring a web within a papermaking machine

Publications (2)

Publication Number Publication Date
EP3384086A1 EP3384086A1 (en) 2018-10-10
EP3384086B1 true EP3384086B1 (en) 2020-06-03

Family

ID=57233480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16791035.5A Active EP3384086B1 (en) 2015-12-04 2016-11-07 Device and method for transferring a web within a papermaking machine

Country Status (4)

Country Link
EP (1) EP3384086B1 (en)
CN (1) CN108368678B (en)
DE (1) DE102015224280A1 (en)
WO (1) WO2017092969A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9206341U1 (en) * 1991-07-25 1992-08-13 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Arrangement for transferring a paper web
DE19636791A1 (en) * 1996-09-11 1998-03-12 Voith Sulzer Papiermasch Gmbh Method and device for removing paper web remnants from a belt
DE102004042637A1 (en) * 2004-09-03 2006-03-09 Voith Paper Patent Gmbh Cutting station for wet web of paper, tissue paper or carton has sliding blade mounted on transverse retractable rail
FI118774B (en) * 2006-06-07 2008-03-14 Metso Paper Inc Method and apparatus for transferring paper or cardboard webs to a wreckage system in closed-web transfer concepts
DE102007014118A1 (en) * 2007-03-23 2008-09-25 Voith Patent Gmbh Device for guiding or transferring a paper, cardboard or other fibrous web
EP2722436A1 (en) * 2012-10-18 2014-04-23 Metso Paper Inc. Belt assembly in a machine for making and/or finishing a fibrous web and use of the belt assembly for moving a web to a dryer section of a paper- or board-making machine
CN103015273B (en) * 2012-12-19 2015-01-21 杭州欧亚环保工程有限公司 Vegetable fiber molded product full-automatic manufacturing method and molding and trimming integrated machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102015224280A1 (en) 2017-06-08
EP3384086A1 (en) 2018-10-10
CN108368678A (en) 2018-08-03
WO2017092969A1 (en) 2017-06-08
CN108368678B (en) 2020-03-27

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