EP3384086B1 - Dispositif et procédé de transfert d'une bande dans une machine à papier - Google Patents

Dispositif et procédé de transfert d'une bande dans une machine à papier 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
Authority
EP
European Patent Office
Prior art keywords
web
clothing
paper
treatment unit
running path
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.)
Active
Application number
EP16791035.5A
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German (de)
English (en)
Other versions
EP3384086A1 (fr
Inventor
Frank-Jochen Ott
Richard Horn
Valentin Sofka
Bernd-Uwe Stellner
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
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Voith Patent GmbH
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Publication date
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Publication of EP3384086A1 publication Critical patent/EP3384086A1/fr
Application granted granted Critical
Publication of EP3384086B1 publication Critical patent/EP3384086B1/fr
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Classifications

    • 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.

Landscapes

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

Claims (9)

  1. Machine à papier ou à carton pour la fabrication d'une bande, comprenant une première unité de traitement (11) et une deuxième unité de traitement (13), la bande étant transférée de la première unité de traitement (11) comprenant une première toile (8) entraînée en circuit fermé sur laquelle s'applique la bande (2) à l'intérieur d'un premier chemin d'avance de bande (15), à la deuxième unité de traitement (13) qui présente une deuxième toile (9) entraînée en circuit fermé sur laquelle la bande (2) est transférée et est guidée à l'intérieur d'un deuxième chemin d'avance de bande (17),
    un rouleau de renvoi (7) réalisé sous forme de rouleau aspirant étant prévu, lequel est apte à soulever la bande (2) depuis la première toile (8) et à la renvoyer dans la direction de la deuxième toile (9), un élément de séparation de bande étant disposé dans la direction d'avance de la bande derrière le rouleau de renvoi réalisé sous forme de rouleau aspirant,
    caractérisée en ce que
    l'élément de séparation de bande (4) est disposé entre 200 et 600 mm dans la direction d'avance de la bande du premier chemin d'avance de bande (15) derrière le rouleau de renvoi (7) réalisé sous forme de rouleau aspirant et en ce que l'élément de séparation de bande (4) est formé par une lame (4') avec un tranchant tourné vers la première toile (8).
  2. Machine à papier ou à carton selon la revendication 1, caractérisée en ce que la distance de la lame (4') à la première toile (8) est de 15 à 40 mm.
  3. Machine à papier ou à carton selon l'une quelconque des revendications 1 et 2, caractérisée en ce que le support (6) sur lequel est montée la lame comprend une paroi de protection contre les éclaboussures (6').
  4. Machine à papier ou à carton selon la revendication 3, caractérisée en ce que la lame (4') est montée de manière remplaçable sur le support (6).
  5. Procédé de transfert d'une bande (2) à l'intérieur d'une machine à papier ou à carton d'une première unité de traitement (11) comprenant une première toile (8) entraînée en circuit fermé sur laquelle s'applique la bande (2) à l'intérieur d'un premier chemin d'avance de bande (15), à une deuxième unité de traitement (13) comprenant une deuxième toile (9) entraînée en circuit fermé sur laquelle la bande (2) est transférée et est guidée à l'intérieur d'un deuxième chemin d'avance de bande (17),
    un rouleau de renvoi (7) réalisé sous forme de rouleau aspirant soulevant la bande (2) depuis la première toile (8) et la renvoyant dans la direction de la deuxième toile (9),
    caractérisé en ce que
    la bande (2) vient en contact par le renvoi avec un élément de séparation de bande (4) et est séparée par celui-ci.
  6. Procédé selon la revendication 5, caractérisé en ce que l'élément de séparation de bande (4) sectionne la bande (2) sur toute la largeur.
  7. Procédé selon l'une quelconque des revendications 5 et 6, caractérisé en ce que l'élément de séparation de bande (4) est formé par une lame (4').
  8. Procédé selon l'une quelconque des revendications 5 à 7, caractérisé en ce que la bande, en particulier pendant une opération de démarrage de l'unité de machine à papier ou pendant une rupture de la bande, utilise le premier chemin d'avance de bande (15).
  9. Procédé selon l'une quelconque des revendications 5 à 8, caractérisé en ce que la bande, pendant un processus de production de l'unité de machine à papier, utilise le deuxième chemin d'avance de bande (17).
EP16791035.5A 2015-12-04 2016-11-07 Dispositif et procédé de transfert d'une bande dans une machine à papier Active EP3384086B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015224280.3A DE102015224280A1 (de) 2015-12-04 2015-12-04 Vorrichtung und Verfahren zur Übergabe einer Bahn innerhalb einer Papiermaschine
PCT/EP2016/076771 WO2017092969A1 (fr) 2015-12-04 2016-11-07 Dispositif et procédé de transfert d'une bande dans une machine à papier

Publications (2)

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

Family

ID=57233480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16791035.5A Active EP3384086B1 (fr) 2015-12-04 2016-11-07 Dispositif et procédé de transfert d'une bande dans une machine à papier

Country Status (4)

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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9206341U1 (de) * 1991-07-25 1992-08-13 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Anordnung zum Überführen einer Papierbahn
DE19636791A1 (de) 1996-09-11 1998-03-12 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zur Entfernung von Papierbahnresten von einem Band
DE102004042637A1 (de) * 2004-09-03 2006-03-09 Voith Paper Patent Gmbh Pressvorrichtung für eine Papiermaschine
FI118774B (fi) * 2006-06-07 2008-03-14 Metso Paper Inc Menetelmä ja laitteisto paperi- tai kartonkirainan siirtämiseksi hylkyjärjestelmään suljetun rainan siirron konsepteissa
DE102007014118A1 (de) * 2007-03-23 2008-09-25 Voith Patent Gmbh Vorrichtung zum Führen bzw. Überführen einer Papier-, Karton- oder anderen Faserstoffbahn
EP2722436A1 (fr) * 2012-10-18 2014-04-23 Metso Paper Inc. Ensemble de courroie dans une machine de fabrication et/ou de finition d'une bande fibreuse et utilisation de l'ensemble de courroie permettant de déplacer une bande vers une section de séchoir d'une machine de fabrication de papier ou de carton
CN103015273B (zh) * 2012-12-19 2015-01-21 杭州欧亚环保工程有限公司 植物纤维模塑制品全自动制造方法及模塑成型切边一体机

Non-Patent Citations (1)

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

Also Published As

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

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