EP1512789B1 - Transfert d'une bande - Google Patents

Transfert d'une bande Download PDF

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Publication number
EP1512789B1
EP1512789B1 EP04103607A EP04103607A EP1512789B1 EP 1512789 B1 EP1512789 B1 EP 1512789B1 EP 04103607 A EP04103607 A EP 04103607A EP 04103607 A EP04103607 A EP 04103607A EP 1512789 B1 EP1512789 B1 EP 1512789B1
Authority
EP
European Patent Office
Prior art keywords
guide roll
roll
fibrous web
transfer
transfer guide
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
EP04103607A
Other languages
German (de)
English (en)
Other versions
EP1512789A3 (fr
EP1512789A2 (fr
Inventor
Karl Josef Böck
Thomas Augscheller
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 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1512789A2 publication Critical patent/EP1512789A2/fr
Publication of EP1512789A3 publication Critical patent/EP1512789A3/fr
Application granted granted Critical
Publication of EP1512789B1 publication Critical patent/EP1512789B1/fr
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
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0272—Wet presses in combination with suction or blowing 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 device and a method for transferring a paper, card, tissue or another fibrous web in a machine for producing and / or finishing the same of a rotating roller to one, of an endless circulating, air-permeable belt looped, evacuated Guide roll, wherein between the roll and the guide roll, a rotating, suctioned transfer guide roll is arranged, which is partially wrapped by the fibrous web or a strip thereof.
  • the transfer prepares here, especially at high machine speeds considerable problems and often leads to one or even tears. This is on the one hand trouble-free detachment of the still wet web of the generally smooth roller and on the other hand, a minimization of the free train between the elements and thus a stabilization of the web run in the foreground.
  • a paper machine in which a transfer roll is applied to the press roll to take over a paper web from a press roll.
  • the object of the invention is therefore to stabilize the web run between the donor roll and the receiving tape in the simplest possible way.
  • the object has been achieved in that the transfer roller is spaced from the guide roller and the fibrous web unsupported by the transfer guide roller reaches the sucked from the air-permeable belt evacuated guide roller and for transferring the fibrous web or a strip thereof, the transfer guide roller in a looping the transfer guide roller and the following guide roller through the fibrous web against the normal operation reducing manner in position is changeable.
  • the smaller loop facilitates the insertion of the transfer strip of the fibrous web considerably.
  • This wrapping of the transfer roller through the fibrous web should extend at least over 120 °, preferably at least 150 °.
  • the vacuum of the transfer guide roll supported by the suction supports the takeover of the fibrous web from the roll and also stabilizes the web run during the wrapping of the transfer guide roll.
  • the transfer guide roll In order to avoid the shear stress of the fibrous web, in particular when starting and braking the machine, the transfer guide roll should be spaced from the roll and the fibrous web should pass unsupported from the roll to the transfer guide roll.
  • the distance between the transfer guide roll and the roll and / or between the transfer guide roll and the guide roll is between 5 and 500 mm.
  • the roll is preferably formed by a press roll of an upstream press unit and the belt by a dryer wire of a following drying unit.
  • the guide roller can be made stable position without this having a limiting effect.
  • the transfer guide roll is variable in position, preferably arranged pivotably. This makes it possible to adapt the position of the transfer guide roller and thus also the web run to the various operating conditions.
  • the position of the transfer guide roller is adjusted in a manner that varies the circumference of the loop around the transfer guide roller and the following guide roller through the fibrous web.
  • the relatively large loop of transfer guide roll and guide roll stabilize the web run during normal operation.
  • the guide roller should have at least one suction zone, which is limited essentially to the region of the looping through the fibrous web during normal operation.
  • the suction zone should at least slightly opposite to the direction of web travel also extend beyond the area enclosed by the fibrous web area.
  • the negative pressure of the transfer guide roller is controllable. This allows, for example, from an energetic point of view, that the negative pressure of the transfer guide roll during the transfer of the fibrous web or a strip thereof is reduced, preferably completely switched off.
  • the evacuated guide roll and the transfer guide roll have a perforated roll shell whose interior is connected to a vacuum source.
  • the transfer guide roll should have a soft coating, which may be formed by a soft polymer, preferably rubber.
  • the transfer guide roll has a thin outer coating of Teflon.
  • the perforation of the transfer guide roll is preferably formed by bores running through the roll shell.
  • the perforated cross-sectional area of the roll jacket comprises about 5-20%, preferably about 5-10%, of the lateral surface.
  • the surface can also be grooved.
  • the diameter of the holes should be a maximum of 10 mm, preferably a maximum of 5 mm and in particular a maximum of 2 mm.
  • the transfer guide roll may also be covered with a porous material cover.
  • the transfer guide roll In order to limit the leakage air drawn in by the transfer guide roll, it should only have one or more suction zones, which are essentially confined to the region of the wrap around the fibrous web. In this case, however, the takeover of the fibrous web from the roll can be assisted by suction if the suction zone extends at least slightly opposite to the web running direction over the area looped by the fibrous web.
  • the fibrous web 1 runs together with an endlessly circulating, water-absorbing press felt 5 of the lower press roll 4.
  • the fibrous web 1 adheres to the outer surface of the upper press roll 3 adhering to a detachment line. From this release line, the fibrous web 1 is unsupported for a short distance, i. in an open train to an evacuated transfer guide roller. 7
  • This transfer suction roll 7 has a suction zone 9 to suck the fibrous web 1 from the roll 3 and to hold during the wrapping on the lateral surface of the transfer guide roll 7. This considerably stabilizes the run of the fibrous web 1.
  • the fibrous web 1 also passes unsupported over a short distance to one of an endlessly circulating, air-permeable belt 2 in the form of a dryer belt and also evacuated guide roller 6.
  • This guide roller 6 has a suction zone 8 to support the acquisition and Guiding the fibrous web 1 on the dryer fabric.
  • the dryer fabric then passes the fibrous web 1 over heated drying cylinders 11 for drying.
  • the inside of the dryer fabric runs along a suction box 10 arranged between the guide roll 6 and the first drying cylinder 11.
  • the guide roller 6 is arranged stable in position, while the transfer guide roller 7 is designed to be pivotable.
  • the guide roller 6 and the transfer guide roller 7 each have a perforated roller shell whose interior is connected in the region of the suction zone 8,9 with a vacuum source. Both suction zones 8, 9 extend substantially over the region of the wrap around the fibrous web 1 and counter to the web running direction 13 also somewhat beyond, so as to support the takeover of the fibrous web 1 by suction.
  • the negative pressure in the transfer guide roll is about -5 kPa, the negative pressure during transfer of the fibrous web 1 is turned off.
  • the transfer guide roller 7 has a soft rubber coating. In order to facilitate the detachment of the fibrous web 1 at the end of the wrapping and to avoid deposits, this coating is coated with a thin layer of Teflon.
  • the transfer guide roller 7 and the guide roller 6 are according to FIG. 1 relatively strongly entwined by the fibrous web 1.
  • an extension line 12 of the running of the guide roller 6 drying wire cuts the transfer guide roller 7 above the central axis.
  • This S-guide of the fibrous web stabilizes the web flow considerably, which makes the device suitable for high machine speeds.
  • FIG. 2 shows the transfer of the fibrous web 1 or a strip thereof.
  • the transfer guide roll 7 is pivoted downwards in a manner which reduces the wrap of the transfer guide roll 7 and the guide roll 6.

Landscapes

  • Paper (AREA)
  • Replacement Of Web Rolls (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (16)

  1. Dispositif pour le transfert d'une nappe de papier, carton, papier-tissu ou d'une autre nappe fibreuse (1) dans une machine de fabrication et/ou d'amélioration de celle-ci, depuis un rouleau rotatif (3) à un rouleau conducteur (6) aspiré, entouré par une bande (2) tournant sans fin, perméable à l'air, un rouleau conducteur de transfert (7) aspiré, rotatif, étant disposé entre le rouleau (3) et le rouleau conducteur (6), lequel est partiellement entouré par la nappe fibreuse (1), et le rouleau conducteur de transfert (7) étant disposé avec une position variable,
    caractérisé en ce que le rouleau conducteur de transfert (7) est espacé du rouleau conducteur (6) et la nappe fibreuse (1) parvient, sans être supportée par le rouleau conducteur de transfert (7), jusqu'au rouleau conducteur (6) aspiré entouré par la bande perméable à l'air (2), et pour le transfert de la nappe fibreuse (1) ou d'un ruban de celle-ci, la position du rouleau conducteur de transfert (7) peut être modifiée de manière à réduire l'enveloppement du rouleau conducteur de transfert (7) ainsi que du rouleau conducteur suivant (6) par la nappe fibreuse (1) par rapport au fonctionnement normal.
  2. Dispositif selon la revendication 1, caractérisé en ce que la nappe fibreuse (1) entoure le rouleau conducteur de transfert (7) avec un angle d'au moins 120°, de préférence d'au moins 150°.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le rouleau conducteur de transfert (7) est espacé du rouleau (3), et la nappe fibreuse (1) parvient, sans être supportée par le rouleau (3), jusqu'au rouleau conducteur de transfert (7).
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la distance entre le rouleau conducteur de transfert (7) et le rouleau (3) et/ou entre le rouleau conducteur de transfert (7) et le rouleau conducteur (6) est comprise entre 5 et 500 mm.
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau (3) est formé par un rouleau de pressage d'une unité de presse montée en amont.
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande (2) est formée par une toile de séchage d'une unité de séchage suivante.
  7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau conducteur (6) est disposé en position stable.
  8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau conducteur de transfert (7) est disposé de manière pivotante.
  9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la dépression du rouleau conducteur de transfert (7) peut être commandée.
  10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau conducteur de transfert (7) présente un revêtement mou.
  11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau conducteur de transfert (7) possède un revêtement extérieur mince en téflon.
  12. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau conducteur de transfert (7) présente une perforation, qui est formée de préférence par des alésages s'étendant à travers l'enveloppe du rouleau.
  13. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau conducteur de transfert (7) possède au moins une zone d'aspiration (9), qui se limite essentiellement à la région d'enveloppement par la nappe fibreuse (1).
  14. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau conducteur (6) possède au moins une zone d'aspiration (8), qui se limite essentiellement à la région d'enveloppement par la nappe fibreuse (1).
  15. Procédé pour le transfert d'une nappe de papier, carton, papier-tissu ou d'une autre nappe fibreuse (1) dans une machine de fabrication et/ou d'amélioration de celle-ci, depuis un rouleau rotatif (3) à un rouleau conducteur (6) aspiré, entouré par une bande (2) tournant sans fin, perméable à l'air, en particulier selon l'une quelconque des revendications précédentes, dans lequel la nappe fibreuse (1) ou un ruban de celle-ci entoure au moins partiellement, entre le rouleau (3) et le rouleau conducteur (6), un rouleau conducteur de transfert (7) aspiré rotatif, caractérisé en ce que la nappe fibreuse (1) parvient, sans être supportée par le rouleau conducteur de transfert (7), jusqu'au rouleau conducteur (6) entouré par la bande perméable à l'air (2), et pour le transfert de la nappe fibreuse (1) ou d'un ruban de celle-ci, la position du rouleau conducteur de transfert (7) est modifiée, celui-ci étant de préférence pivoté, de manière à réduire l'enveloppement du rouleau conducteur de transfert (7) ainsi que du rouleau conducteur suivant (6) par la nappe fibreuse (1) par rapport au fonctionnement normal.
  16. Procédé selon la revendication 15, caractérisé en ce que la dépression du rouleau conducteur de transfert (7) pendant le transfert de la nappe fibreuse (1) ou d'un ruban de celle-ci est réduite, de préférence est complètement supprimée.
EP04103607A 2003-09-06 2004-07-28 Transfert d'une bande Expired - Lifetime EP1512789B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341165 2003-09-06
DE10341165A DE10341165A1 (de) 2003-09-06 2003-09-06 Bahnübergabe

Publications (3)

Publication Number Publication Date
EP1512789A2 EP1512789A2 (fr) 2005-03-09
EP1512789A3 EP1512789A3 (fr) 2005-11-23
EP1512789B1 true EP1512789B1 (fr) 2010-04-14

Family

ID=34129675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04103607A Expired - Lifetime EP1512789B1 (fr) 2003-09-06 2004-07-28 Transfert d'une bande

Country Status (3)

Country Link
EP (1) EP1512789B1 (fr)
AT (1) ATE464429T1 (fr)
DE (2) DE10341165A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2718825A (en) * 1952-06-21 1955-09-27 Beloit Iron Works Suction transfer roll assembly
DE2627434C2 (de) * 1976-06-18 1983-11-10 Valmet Oy, 00130 Helsinki Pressenpartie einer Papiermaschine
FI88812C (fi) * 1992-03-05 1993-07-12 Valmet Paper Machinery Inc Anordning vid styrning av banans spetsdragningsband i en pappersmaskin
DE9204175U1 (de) * 1992-03-27 1992-06-25 J.M. Voith Gmbh, 7920 Heidenheim Bahnabnahme-Vorrichtung
DE4401379A1 (de) * 1994-01-19 1994-06-01 Voith Gmbh J M Zugfreie Bahnführung in der Pressenpartie einer Papiermaschine
DE19637529A1 (de) * 1996-09-14 1998-03-19 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zur Überführung einer Papierbahn von einer Walze auf ein Trockensieb
DE10212368A1 (de) * 2002-03-20 2003-10-02 Voith Paper Patent Gmbh Vorrichtung zum Überführen einer Materialbahn

Also Published As

Publication number Publication date
DE502004011019D1 (de) 2010-05-27
ATE464429T1 (de) 2010-04-15
EP1512789A3 (fr) 2005-11-23
DE10341165A1 (de) 2005-03-31
EP1512789A2 (fr) 2005-03-09

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