EP0930392A2 - Section de pressage - Google Patents

Section de pressage Download PDF

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Publication number
EP0930392A2
EP0930392A2 EP98121011A EP98121011A EP0930392A2 EP 0930392 A2 EP0930392 A2 EP 0930392A2 EP 98121011 A EP98121011 A EP 98121011A EP 98121011 A EP98121011 A EP 98121011A EP 0930392 A2 EP0930392 A2 EP 0930392A2
Authority
EP
European Patent Office
Prior art keywords
press
web
roller
fibrous web
press section
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.)
Granted
Application number
EP98121011A
Other languages
German (de)
English (en)
Other versions
EP0930392A3 (fr
EP0930392B1 (fr
Inventor
Wolfgang Mayer
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 Paper Patent GmbH
Voith Sulzer Papiertechnik 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 Paper Patent GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0930392A2 publication Critical patent/EP0930392A2/fr
Publication of EP0930392A3 publication Critical patent/EP0930392A3/fr
Application granted granted Critical
Publication of EP0930392B1 publication Critical patent/EP0930392B1/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
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • 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

Definitions

  • the invention relates to a press section of a machine for producing a Fibrous web, in particular a paper and / or cardboard web with at least two successive, double felted presses.
  • Such press sections are known and are used for dewatering the fibrous webs.
  • the shoe presses form a concave contact surface that it allows an extended press nip with a cylindrical counter roll form.
  • Such press nips can significantly improve drainage performance.
  • the object of the invention is therefore a simply constructed press section with improved drainage in the first or upstream press nip create.
  • the object was achieved in that the press nip in Upstream press direction from a deflection-controlled Shoe roller and an aspirated roller is formed.
  • the shoe press rolls are generally made of a flexible press jacket formed, which runs over a pressing element with a concave contact surface. This allows the formation of an extended press nip with a cylindrical Counter roll, so that the fibrous web in the press nip over a longer distance exposed to the pressure and thus more internally drained. In addition, sets the pressure in the press nip no longer suddenly, this can be from one low value, for example, continuously brought to a higher value become.
  • the drainage felts arranged on both sides of the fibrous web ensure this not only for sufficient capacity to take the squeezed out Water but also for the equilibrium of the fibrous web. Furthermore is achieved by using a vacuumed roller in the upstream or first press nip the capacity for the squeezed water essential increased.
  • the fibrous web starting from the takeover of an upstream to the Transfer to a subsequent unit at least from a belt, sieve, felt or similar is supported. This leads to a safe web guidance and thereby reduces the frequency of web breaks.
  • the dewatering performance of the press section can also be significant can be improved if the following, double felted in the direction of web travel Press nip preferably from at least one deflection-controlled roller is formed in the form of a shoe roller. This enables the press section limited to two press nips, which significantly reduces the effort.
  • the fiber web can be guided by a drainage felt the press nip are taken over. It is particularly advantageous in this Case when a first press dewatering the fibrous web from the upstream screen section and on the other side of the fibrous web arranged dewatering felt of the following press the fibrous web from the drainage felt of the first press and to the next one Dryer section passes.
  • FIG. 1 shows a schematic representation the press section with two press nips 5 and 9. This is around the rollers each press nip 5 and 9 each have an endless dewatering felt 11, 12, which serves to absorb the squeezed water. They also own Presses 2 and 3 each have a deflection-controlled shoe roller 6 and 10. During the press nip 5 of the upstream press 2 in the web running direction 4 with a cylindrical suction roll 15 is formed, this is done in the following Press 3 with a cylindrical smooth roller 16.
  • the deflection-controlled shoe rollers 6 and 10 ensure that adjustable, preferably uniform drainage profile axially along each press nip 5 and 9.
  • By using two drainage felts each 11, 12 in each press nip 5 and 9 is a sufficiently large capacity given to absorb the squeezed water.
  • the Fiber web 1 each of a drainage felt 11, 12 supported by the Press section are performed.
  • the vacuumed roller 15 has a perforated roller shell, the interior is connected to a vacuum source.
  • the vacuum not only ensures secure guidance of the fibrous web 1 after leaving the first Press nip 5 on the drainage felt 11 but also for a reduced Remoistening of the fibrous web 1 through the dewatering felt 11.
  • the fibrous web is 1 directly removed from the screen 13 of an upstream unit 7. This is done with the aid of a suction guide roller, which is removed from the drainage felt 11 the sucked roller 15 of the first press 2 is wrapped. After the first Press nip 9 is in turn supported by a suction guide roller Fibrous web 1 arranged on the other side of the fibrous web 1 Hand over drainage felt 12. This the smooth roller 16 rotating Drainage felt 12 in turn transfers the fibrous web 1 from one evacuated guide roller supports on a dryer fabric 14 of the following unit 8. This unit 8 is designed here as a dryer section in which the fibrous web 1 together with the dryer 14 alternately via drying cylinders and Guide rollers is guided.

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  • Paper (AREA)
EP98121011A 1998-01-20 1998-11-05 Section de pressage Expired - Lifetime EP0930392B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19801891A DE19801891A1 (de) 1998-01-20 1998-01-20 Pressenpartie
DE19801891 1998-01-20

Publications (3)

Publication Number Publication Date
EP0930392A2 true EP0930392A2 (fr) 1999-07-21
EP0930392A3 EP0930392A3 (fr) 2001-01-10
EP0930392B1 EP0930392B1 (fr) 2005-02-02

Family

ID=7855089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121011A Expired - Lifetime EP0930392B1 (fr) 1998-01-20 1998-11-05 Section de pressage

Country Status (4)

Country Link
US (1) US6589390B1 (fr)
EP (1) EP0930392B1 (fr)
CA (1) CA2260115A1 (fr)
DE (2) DE19801891A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1071847B2 (fr) † 1998-03-16 2010-01-27 Metso Paper, Inc. Machine a papier et procede de production d'une bande papier

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022605A1 (de) * 2000-05-09 2001-11-15 Voith Paper Patent Gmbh Pressenpartie
DE10234959A1 (de) * 2002-07-31 2004-02-19 Voith Paper Patent Gmbh Pressenanordnung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29701382U1 (de) * 1997-01-28 1997-03-20 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Pressenpartie einer Papiermaschine
DE29701948U1 (de) * 1996-03-01 1997-04-03 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Pressenpartie einer Papiermaschine
EP0770727A1 (fr) * 1990-11-23 1997-05-02 Valmet Corporation Procédure et dispositif pour drainage d'une bande de papier par pressage
DE19708967A1 (de) * 1997-03-05 1998-09-10 Voith Sulzer Papiermasch Gmbh Pressenpartie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5389205A (en) 1990-11-23 1995-02-14 Valmet Paper Machinery, Inc. Method for dewatering of a paper web by pressing using an extended nip shoe pre-press zone on the forming wire
US5868904A (en) * 1993-12-08 1999-02-09 Valmet Corporation Press section employing an extended nip press with suction counter roll
FI114227B (fi) * 1995-04-24 2004-09-15 Metso Paper Inc Paperikone, jossa on puristinosa ja kuivatusosa
FI98843C (fi) * 1995-10-03 1997-08-25 Valmet Corp Menetelmä ja laite veden poistamiseksi paperi- tai kartonkiradasta puristamalla

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0770727A1 (fr) * 1990-11-23 1997-05-02 Valmet Corporation Procédure et dispositif pour drainage d'une bande de papier par pressage
DE29701948U1 (de) * 1996-03-01 1997-04-03 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Pressenpartie einer Papiermaschine
DE29701382U1 (de) * 1997-01-28 1997-03-20 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Pressenpartie einer Papiermaschine
DE19708967A1 (de) * 1997-03-05 1998-09-10 Voith Sulzer Papiermasch Gmbh Pressenpartie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1071847B2 (fr) † 1998-03-16 2010-01-27 Metso Paper, Inc. Machine a papier et procede de production d'une bande papier

Also Published As

Publication number Publication date
EP0930392A3 (fr) 2001-01-10
DE59812539D1 (de) 2005-03-10
CA2260115A1 (fr) 1999-07-20
EP0930392B1 (fr) 2005-02-02
DE19801891A1 (de) 1999-07-22
US6589390B1 (en) 2003-07-08

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