EP1992736B1 - Agencement de presse - Google Patents

Agencement de presse Download PDF

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Publication number
EP1992736B1
EP1992736B1 EP08150993A EP08150993A EP1992736B1 EP 1992736 B1 EP1992736 B1 EP 1992736B1 EP 08150993 A EP08150993 A EP 08150993A EP 08150993 A EP08150993 A EP 08150993A EP 1992736 B1 EP1992736 B1 EP 1992736B1
Authority
EP
European Patent Office
Prior art keywords
roll
spreader
fibrous web
press
dewatering belt
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.)
Not-in-force
Application number
EP08150993A
Other languages
German (de)
English (en)
Other versions
EP1992736A1 (fr
Inventor
Thomas Gnann
Wolfgang Mayer
Franz Schuster
Roland Kurz
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 EP1992736A1 publication Critical patent/EP1992736A1/fr
Application granted granted Critical
Publication of EP1992736B1 publication Critical patent/EP1992736B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21F3/04—Arrangements thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/36—Guiding mechanisms
    • D21F1/40—Rolls

Definitions

  • the invention relates to a pressing arrangement for dewatering a paper, board, tissue or another fibrous web in a machine for producing and / or finishing the same, with at least one press nip through which the fibrous web is guided together with at least one water-absorbing dewatering belt the dewatering belt wraps around a spreader roll before or after the press nip, with no further roll between the press nip and the spreader roll.
  • Such a press arrangement is known from DE-A-37 29 723 or the EP-A-0 515 339 known.
  • the dewatering belts in the form of press felts are currently fed over guide rolls and a spreader roll.
  • Spreader rollers can compensate for the belt advance of the respective lateral edges and prevent the formation of wrinkles after a band change.
  • the object of the invention is therefore to improve the management of the dewatering belt with the least possible effort.
  • the object has been achieved in that the spreader roller has a roll shell made of plastic, whose diameter is between 130 and 800 cm
  • Spreader rolls with a roll shell made of plastic are made of DE 197 29 907 as well as the EP 1 239 169 known. It is essential that the roll shell is supported only in an axially central region on a continuous roll carrier at least in the radial direction. Outside this central region, the roll shell has a, a bending of the roll shell relative to the roll carrier permitting distance to the roll carrier.
  • Such spreader rolls can also be designed, in particular, in conjunction with a roll shell made of fiber-reinforced plastic with substantially small roll diameters. This in turn allows the arrangement of spreader rollers relatively close to the respective press nip, so that compared to conventional spreader rollers reduced spreading effect of these spreader rolls is compensated with plastic jacket. In addition, as often a guide roller can be omitted, since the spreader roller takes its place.
  • the dewatering belt should wrap around the spreader roll in a circumferential range between 90 and 180 °. This large wrap additionally improves the spreading effect of this spreader roll.
  • press arrangements in which the press nip is formed between a press roll wrapped by the dewatering belt and a central roll, the central roll being involved in a plurality of press nips.
  • the spreader roll should be arranged in front of the corresponding press nip and the dewatering belt only come into contact with the fibrous web after the spreader roll.
  • the spreader roller is arranged in front of the press nip and the dewatering belt comes into contact with the fibrous web only after the spreader roll.
  • the spreader roller is arranged after the press nip.
  • the dewatering belts should lead the fibrous web after the press nip to the spreader roll together and run the fibrous web after the spreader roll only with the arranged on the, the spreader roll side of the fibrous web dewatering belt.
  • the pulp web after the spreader roll alone leading dewatering belt should wrap around a suctioned guide roller during the routing of the other dewatering belt.
  • the dewatering belt leading the fibrous web after the spreader roll alone can transfer the fibrous web to an endlessly circulating belt of a following unit, for example a further press nip or a dryer group.
  • one, of a water-absorbing, endless circulating dewatering belt 2 wrapped spreader roller 3 is used directly before or after a press nip, with no further roller between the press nip and the spreader roll.
  • the spreader roll 3 has a roll shell made of a fiber-reinforced plastic, which is mounted exclusively in the axially central region on a continuous roll carrier. Outside this central region, the roll shell can bend relative to the roll carrier.
  • the degree of jacket bending as well as the direction thereof depends on the belt tension and the direction of action and the weight of the roll shell.
  • the type of effect depends on the type of deflection (convex or concave) of the looped area of this roller. In all examples, however, a spreading effect is desired.
  • the ends of the roll shell as in the EP 1 239 169 described, be designed with a higher weight.
  • the weight can but according to the DE 197 29 907 also be reduced continuously to the roll ends.
  • an axial displacement of the roll shell on the roll carrier according to the WO 2005/115894 can be an advantage.
  • the spreader roll 3 Due to the low weight, the spreader roll 3, however, remain limited in any case, even with large machine widths to diameter between 130 and 800 cm. This makes it possible to arrange the spreader roll 3 relatively close to the press nip of the dewatering belt 2, thereby replacing a guide roll.
  • the effect of the spreader roller 3 is substantially increased, which their use in many cases because of compared to conventional spreader rolls with metal sheath low spreading effect only makes sense.
  • the spreading effect is further increased by a relatively large wrap of the spreader roll 3 by the dewatering belt 2 in a circumferential range between 90 and 180 °.
  • the fibrous web 1 runs together with both sides of a dewatering belt 2,4 by a, formed by an upper press roller 5 and a lower counter roller 6 press nip.
  • the upper dewatering belt 2 of the press roll 5 wraps around the press nip a spreader roll 3 with a roll shell made of plastic. Between the press nip and the spreader roll 3, the fibrous web 1 is guided by two dewatering belts 2,4.
  • the fibrous web 1 only runs with the lower dewatering belt 4.
  • the lower dewatering belt 4 wraps around an evacuated guide roll arranged opposite the spreader roll 3 7th
  • the lower dewatering belt 4 transfers the fibrous web 1 to an air-permeable belt 8 of a following machine unit, which wraps around an evacuated guide roller 10 during the transfer.
  • Aspirated guide rollers 7,10 usually have a perforated roll shell whose interior is connected to a vacuum source.
  • the spreader roll is in such pressing arrangements in front of the press nip, and then between this spreader roll and the press nip nor an evacuated guide roller to support the acquisition of the fibrous web 1 is arranged.
  • the small dimensions and the improved stretching effect allow the use of the plastic roller spreader roll after the press nip instead of a normal guide roll.
  • pulp web 1 passes through only one of two press rolls 16,18 formed first press nip together with both sides each a water-absorbing drainage tape 15,17. After this first press nip, the fibrous web 1 runs together with the upper dewatering belt 15 through a second press nip formed by the upper press roll 16 and a central roll 11.
  • the fibrous web 1 on the roll shell of the central roll 11 adheres alone up to a third press nip, which is formed by the central roll 11 and a press roll 5 arranged above.
  • a third press nip which is formed by the central roll 11 and a press roll 5 arranged above.
  • the fibrous web 1 runs together with a dewatering belt 2 of the press roll. 5
  • the fibrous web 1 again adheres alone to the roll shell of the central roll 11 until it is taken over by a roll 12 which subsequently guides the fibrous web 1 through a press nip formed by this roll 12 and a further press roll 13 with lower dewatering belt 14.
  • press assembly passes through the fibrous web 1 together with a respective dewatering belt 2,4 a first, formed by a lower press roll 5 and an upper counter roll 6 press nip.
  • the upper dewatering belt 4 guides the fibrous web 1 through a second press nip, which is formed between the counter-roller 6 and a press roller 19.
  • the roll shell of this press roll 19 then guides the fibrous web 1 through a third press nip, which is formed by the press roll 19 and an upper press roll 20 looped around by a dewatering belt 21.
  • the fibrous web 1 is transferred from the press roller 19 to an air-permeable belt 23 of a following in the web running direction 9 machine unit, the acquisition of one, the belt 23 looped and evacuated guide roller 22 supports.
  • All dewatering belts 2,4,14,15,17,21 are here designed as air-permeable and water-absorbing press felts.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Press Drives And Press Lines (AREA)
  • Glass Compositions (AREA)

Claims (10)

  1. Agencement de presse pour l'essorage d'une bande de papier, de carton, d'essuie-tout ou d'une autre bande de matière fibreuse (1) dans une machine pour la fabrication et/ou le traitement de cette bande, avec au moins une fente de pressage, à travers laquelle la bande de matière fibreuse (1) est guidée en même temps qu'au moins une bande d'essorage absorbant l'eau (2), dans lequel la bande d'essorage (2) entoure un rouleau élargisseur (3) avant ou après la fente de pressage, dans lequel il ne se trouve aucun autre rouleau entre la fente de pressage et le rouleau élargisseur (3), caractérisé en ce que le rouleau élargisseur (3) présente une enveloppe de rouleau en matière plastique, dont le diamètre se situe entre 130 et 800 mm.
  2. Agencement de presse selon la revendication 1, caractérisé en ce que la bande d'essorage (2) entoure le rouleau élargisseur (3) dans une zone périphérique comprise entre 90° et 180°.
  3. Agencement de presse selon la revendication 1 ou 2, caractérisé en ce que seule une bande d'essorage (2) circule à travers la fente de pressage.
  4. Agencement de presse selon la revendication 3, caractérisé en ce que la fente de pressage est formée entre un rouleau de pressage (5) entouré par la bande d'essorage (2) et un rouleau central (11), dans lequel le rouleau central (11) est impliqué dans plusieurs fentes de pressage.
  5. Agencement de presse selon la revendication 1 ou 2, caractérisé en ce que la bande de matière fibreuse (1) circule à travers la fente de pressage avec une bande d'essorage absorbant l'eau (2, 4) sur les deux faces.
  6. Agencement de presse selon l'une quelconque des revendications précédentes, caractérisé en ce que le rouleau élargisseur (3) est disposé avant la fente de pressage et la bande d'essorage (2) ne vient en contact avec la bande de matière fibreuse (1) qu'après le rouleau élargisseur (3).
  7. Agencement de presse selon la revendication 5, caractérisé en ce que la fente de pressage est formée par un rouleau de pressage (5) entouré par la bande d'essorage (2) avec le rouleau élargisseur (3) et un rouleau d'appui (6), dans lequel le rouleau d'appui (6) forme encore une fente de pressage avec un autre rouleau de pressage (19) après la fente de pressage.
  8. Agencement de presse selon la revendication 5, caractérisé en ce que le rouleau élargisseur (3) est disposé après la fente de pressage, les bandes d'essorage (2, 4) guident ensemble la bande de matière fibreuse (1) après la fente de pressage jusqu'au rouleau élargisseur (3), et la bande de matière fibreuse (1) circule après le rouleau élargisseur (3) avec la bande d'essorage (4) disposée sur la face de la bande de matière fibreuse (1) opposée au rouleau élargisseur (3).
  9. Agencement de presse selon la revendication 8, caractérisé en ce que la bande d'essorage (4) guidant seule la bande de matière fibreuse (1) après le rouleau élargisseur (3) entoure un rouleau de déviation aspirant (7) pendant l'enlèvement de l'autre bande d'essorage (2).
  10. Agencement de presse selon la revendication 8 ou 9, caractérisé en ce que la bande d'essorage (4) guidant seule la bande de matière fibreuse (1) après le rouleau élargisseur (3) transmet la bande de matière fibreuse (1) à une bande mobile sans fin (8) d'une unité qui suit.
EP08150993A 2007-05-18 2008-02-04 Agencement de presse Not-in-force EP1992736B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007023393A DE102007023393A1 (de) 2007-05-18 2007-05-18 Pressanordnung

Publications (2)

Publication Number Publication Date
EP1992736A1 EP1992736A1 (fr) 2008-11-19
EP1992736B1 true EP1992736B1 (fr) 2010-04-21

Family

ID=39156381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08150993A Not-in-force EP1992736B1 (fr) 2007-05-18 2008-02-04 Agencement de presse

Country Status (3)

Country Link
EP (1) EP1992736B1 (fr)
AT (1) ATE465294T1 (fr)
DE (2) DE102007023393A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010018272A1 (de) 2010-04-26 2011-10-27 Airbus Operations Gmbh Schienensystem und Verfahren zur Montage einer Komponente in einem Flugzeug

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI72766C (fi) * 1986-02-13 1987-07-10 Valmet Oy Utbredningsvals eller motsvarande foer vaevnaden i en pappersmaskin samt foerfarande foer framstaellning av denna.
FI863713A (fi) * 1986-09-12 1988-03-13 Valmet Oy Slutet och kompakt pressparti i pappersmaskin.
FI100412B (fi) * 1991-05-21 1997-11-28 Valmet Paper Machinery Inc Järjestelmä paperikoneen puristinosassa puristushuopien kulun valvonna ssa ja ohjauksessa
DE19729907A1 (de) 1997-07-12 1999-01-14 Voith Sulzer Papiermasch Gmbh Walze
DE10112202A1 (de) 2001-03-09 2002-09-19 Voith Paper Patent Gmbh Walze
DE102004026535A1 (de) 2004-05-29 2005-12-22 Voith Paper Patent Gmbh Drehteil

Also Published As

Publication number Publication date
ATE465294T1 (de) 2010-05-15
DE502008000546D1 (de) 2010-06-02
DE102007023393A1 (de) 2008-11-20
EP1992736A1 (fr) 2008-11-19

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