EP1586697B1 - Machine à papier - Google Patents

Machine à papier Download PDF

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Publication number
EP1586697B1
EP1586697B1 EP05101588A EP05101588A EP1586697B1 EP 1586697 B1 EP1586697 B1 EP 1586697B1 EP 05101588 A EP05101588 A EP 05101588A EP 05101588 A EP05101588 A EP 05101588A EP 1586697 B1 EP1586697 B1 EP 1586697B1
Authority
EP
European Patent Office
Prior art keywords
fibrous web
cylinder
drying
calendering
drying arrangement
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
EP05101588A
Other languages
German (de)
English (en)
Other versions
EP1586697A1 (fr
Inventor
Rüdiger Dr. Kurtz
Jörg Dr. Rheims
Udo Gabbusch
Joachim Hinz
Ingolf Cedra
Holger Humberg
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 EP1586697A1 publication Critical patent/EP1586697A1/fr
Application granted granted Critical
Publication of EP1586697B1 publication Critical patent/EP1586697B1/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
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over the cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus

Definitions

  • the invention relates to a machine for producing a paper, board, tissue or other fibrous web from a pulp suspension with a heated cylinder and a pressure hood comprising a dry assembly and a calender for smoothing the fibrous web.
  • moisture gradient calendering In known paper machines, the paper web is guided with uniform moisture distribution in all three spatial directions within the paper web to the calender. Subsequently, for effective calendering to produce a moisture gradient in the direction of the web thickness (z direction) ("moisture gradient calendering"), a steam blower box for condensate film formation is usually used on the paper web side associated with the hot roll in the calender nip.
  • the WO01 / 14637 discloses a paper machine in which the fibrous web is first passed over a Yankee drying cylinder and then through a smoothing assembly. According to this document, in this case the side facing the Yankee drying cylinder, which also faces the hard roller of the smoothing arrangement.
  • the US6,207,019 discloses a machine for treating a paper web in which the paper web is first passed over a drying cylinder and then via a smoothing arrangement with rollers.
  • this object is achieved in that the smoothing unit (13, 32) comprises one or more nips and that the hard and heatable roller (s) (14, 33, 35) of the calender (13, 32) the side facing away from the cylinder (6) of the drying arrangement (5, 31) faces the fibrous web (1, 21) and that the pressure hood (7, 30) is cooled.
  • the circulating screen of the dry arrangement cools sufficiently so that it cools on the side facing away from the drying cylinder on contact with the fibrous web in the drying arrangement to such an extent that there is more on this side Moisture in the fibrous web remains as on the other side.
  • the drying arrangement may be arranged downstream of the calendering unit, a device for wetting the fibrous web on the side remote from the drying cylinder in order to further increase the already existing moisture profile.
  • a steam blow box or a spray dampening unit is particularly suitable.
  • a shoe calender is advantageously used, in which the moister side of the fibrous web wraps around a heatable roller against which a non-heated press shoe presses.
  • a calender can be used, in which between the Heatable rollers each a soft roller is interposed.
  • the temperature and the contact pressure of the drying cylinder in the drying arrangement are selected such that the side of the fibrous web facing the drying cylinder receives the smoothness state required for the reeling of the fibrous web when passing through the drying arrangement.
  • the invention thus provides the combination of a dry arrangement and a calender in such a way that the moist and the cold side of the drying arrangement, ie the side facing the pressure hood, generated by the condensation of the water from the fibrous web and through the cold sieves is characterized and is also adversely provided with strong screen marks, in the immediately following calender, preferably in a hot shoe calender, is performed on the hot calender roll in the nip.
  • the smooth and hot paper side produced by the dryer assembly often does not require further additional treatment or smoothering.
  • the moisture of the fibrous web at the exit from the drying arrangement on the side facing the sieve is to be optimized so that the resulting sieve mark can be removed by the smoother still by a very hot side of the roll meets this side in the nip.
  • a machine for producing a fibrous web 1 ( Fig. 1 ) comprises a drying device 4 comprising a plurality of drying cylinders 2 and deflection rollers 3. The latter is arranged downstream of a drying arrangement 5 with a heated drying cylinder 6 and a pressure hood 7 with a cooling medium contained therein.
  • the dry content of the fibrous web 1 before entry into the drying arrangement 5 is between 70 and 80%. After leaving the dryer, it is between 92 and 95%.
  • the fibrous web 1 is passed between the drying cylinder 6 and the pressure hood 7.
  • the sieves 8, 9 are discharged via guide rollers 10 upwards to deliver the moisture absorbed by them.
  • the fibrous web 1 is forwarded to deflection rollers 11, 12 to form a shoe calender designed as calender 13.
  • This comprises a heatable cylinder 14, which forms a prolonged nip with a shoe roll 15.
  • the fibrous web 1 is passed between the cylinder 14 and the shoe roll 15 such that the moist side provided with the marks of the wire 9 passes over the shell side of the cylinder 14 and is smoothed by the hot cylinder 14.
  • a device for moistening the fibrous web 1 facing the upper side of the fibrous web 1 can additionally be arranged, if it already has too high a dry content on the upper side. After the fibrous web 1 has passed through the calender 13, it is wound into a roll in a winding apparatus.
  • a drying arrangement 5 according to Fig. 1 equipped paper machine ( Fig. 2 ) is fed from a headbox 16 a pulp suspension to a gap between two screens 17 and 18 of a Doppelsiebformers 19.
  • the wires 17, 18 run towards each other in a wedge shape and enclose the pulp suspension between them.
  • there is a first dewatering of the pulp suspension and it forms a fiber mat from which a paper web 21 is formed.
  • the twin-wire former 19 is followed by a press section 20.
  • the press section 20 comprises, for example, three press points 21, 22, 23 as shown.
  • the first two press points 21, 22 form a tandem Nipco-Flex press section, in each of which a roller 23, 24 cooperates with a shoe press roll 25, 26.
  • the paper web 21 is passed between a drying cylinder 29 and a pressure hood 30 a drying assembly 31 which is constructed as the drying assembly 5 according to Fig. 1 ,
  • the paper web 21 enters a calender 32, in which it is smoothed.
  • the calender 32 is on the type of from the EP 0 732 445 B1 constructed calender and includes only rollers that smooth the paper web 21 on one side on the upper side, which has received 31 screen marks when passing through the drying assembly.
  • the calender 32 has a roll stack with four rolls 33, 34, 35 and 36.
  • the roller 33 is heated, deflection-controlled and has a hard surface.
  • the roller 34 has a soft surface.
  • the roller 35 is heated and has a hard lateral surface, while the roller 36 again has a soft lateral surface.
  • the paper web 21 is smoothed on one side on the marks having side and simultaneously heated until it has the same degree of dryness and gloss and same smoothness obtained on this page as the opposite side.
  • the paper web 21 is forwarded via further pulleys to a winding machine 37, in which it is wound into a roll.
  • the winding machine 37 can also be arranged offline from the machine for producing the paper web 21 from the pulp suspension.

Landscapes

  • Paper (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Claims (6)

  1. Machine de fabrication d'une nappe de papier, carton, papier tissu ou d'une autre nappe fibreuse (1, 21), à partir d'une suspension de matière fibreuse, comprenant un agencement de séchage (5, 31) comprenant un cylindre chauffé (6, 29) et une hotte de pression (7, 30), et un mécanisme de lissage (13, 32) pour lisser la nappe fibreuse (1, 21), l'agencement de séchage (5, 31) étant disposé directement avant le mécanisme de lissage (13, 32),
    caractérisée en ce que
    le mécanisme de lissage (13, 32) comprend un ou plusieurs pinçages et en ce que le ou les rouleaux durs et chauffables (14, 33, 35) du mécanisme de lissage (13, 32) sont tournés vers le côté de la nappe fibreuse (1, 21) opposé au cylindre (6) de l'agencement de séchage (5, 31), et en ce que la hotte de pression (7, 30) est refroidie.
  2. Machine selon la revendication 1,
    caractérisée en ce que
    l'on dispose entre l'agencement de séchage (5, 31) et le mécanisme de lissage (13, 32) un dispositif pour humidifier la nappe fibreuse (1, 21) du côté opposé au cylindre (6).
  3. Machine selon la revendication 2,
    caractérisée en ce que
    le dispositif est un distributeur de vapeur ou un mécanisme d'humidification par pulvérisation.
  4. Machine selon l'une quelconque des revendications 1 à 3,
    caractérisée en ce que
    le mécanisme de lissage est un mécanisme de lissage à sabot (13).
  5. Machine selon l'une quelconque des revendications 1 à 4,
    caractérisée en ce
    qu'un rouleau souple (34, 36) est à chaque fois interposé entre les rouleaux durs chauffables (33, 35).
  6. Machine selon l'une quelconque des revendications 1 à 5,
    caractérisée en ce que
    la température et la pression d'application du cylindre (6) dans l'agencement de séchage (5, 31) sont choisies de telle sorte que le côté de la nappe fibreuse (1, 21) tourné vers le cylindre (6) acquière l'état de lissage requis pour l'enroulement de la nappe fibreuse (1, 21) lors du passage à travers l'agencement de séchage (5, 31).
EP05101588A 2004-04-13 2005-03-02 Machine à papier Not-in-force EP1586697B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004017823A DE102004017823A1 (de) 2004-04-13 2004-04-13 Papiermaschine
DE102004017823 2004-04-13

Publications (2)

Publication Number Publication Date
EP1586697A1 EP1586697A1 (fr) 2005-10-19
EP1586697B1 true EP1586697B1 (fr) 2010-05-26

Family

ID=34938857

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05101588A Not-in-force EP1586697B1 (fr) 2004-04-13 2005-03-02 Machine à papier

Country Status (3)

Country Link
EP (1) EP1586697B1 (fr)
AT (1) ATE469264T1 (fr)
DE (2) DE102004017823A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054103A1 (de) * 2005-11-12 2007-05-16 Voith Patent Gmbh Glättanordnung
DE102008043704A1 (de) 2008-11-13 2010-05-20 Voith Patent Gmbh Verfahren und Vorrichtung zur Trocknung und Glättung einer Faserstoffbahn
IT1395302B1 (it) * 2009-08-07 2012-09-05 Trani Metodo di realizzazione di un nastro continuo di carta estensibile in senso longitudinale ed in senso trasversale.-
AT17730U3 (de) * 2022-07-05 2023-02-15 Voith Patent Gmbh Maschine und Verfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6207019B1 (en) * 1995-08-18 2001-03-27 Abitibi-Price, Inc. Calender hood
DE19723163A1 (de) * 1997-06-03 1998-12-10 Voith Sulzer Papiermasch Gmbh Trockenpartie
FI112681B (fi) * 1999-08-24 2003-12-31 Metso Paper Inc Menetelmä ja sovitelma paperi- ja/tai kartonkirainan pintakäsittelyä varten
FI109040B (fi) * 2000-01-28 2002-05-15 Metso Paper Inc Menetelmä paperi- tai kartonkirainan kalanteroinnissa ja kalanteri

Also Published As

Publication number Publication date
DE102004017823A1 (de) 2005-11-03
ATE469264T1 (de) 2010-06-15
EP1586697A1 (fr) 2005-10-19
DE502005009621D1 (de) 2010-07-08

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