EP1375740A1 - Dispositif de pressage - Google Patents

Dispositif de pressage Download PDF

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Publication number
EP1375740A1
EP1375740A1 EP03100869A EP03100869A EP1375740A1 EP 1375740 A1 EP1375740 A1 EP 1375740A1 EP 03100869 A EP03100869 A EP 03100869A EP 03100869 A EP03100869 A EP 03100869A EP 1375740 A1 EP1375740 A1 EP 1375740A1
Authority
EP
European Patent Office
Prior art keywords
press
fibrous web
arrangement according
belt
rollers
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.)
Withdrawn
Application number
EP03100869A
Other languages
German (de)
English (en)
Inventor
Per-Ola Lidar
Thomas Augscheller
Georg Dr. Kleiser
Oswald Satzger
Thomas RÜHL
Joachim Dr. Grabscheid
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
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 filed Critical Voith Paper Patent GmbH
Publication of EP1375740A1 publication Critical patent/EP1375740A1/fr
Withdrawn legal-status Critical Current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 arrangement for dewatering a paper, cardboard, Tissue or other fibrous web in a machine for production and / or finishing the fibrous web with at least two neighboring ones, extended press nips, each with a shoe press roller with concave Press surface and a cylindrical counter roll are formed, the Shoe press rolls as well as the counter rolls of one endless rotating belt wrapped around and the shoe press rollers of two adjacent, elongated Press nips are arranged on different sides of the fibrous web.
  • web guiding devices are often found in the form of suction guide rolls or Suction boxes application.
  • it is often in the rear Part of the press assembly is a smooth, waterproof tape for guiding the Fibrous web used.
  • the object of the invention is therefore to minimize the web guidance Make the effort safer.
  • the object was achieved in that the tapes of the Counter rolls are guided away from the fibrous web after the respective press nip and the fibrous web between the bands of the shoe press rolls neighboring press nip is passed.
  • the strip was due to the concave curvature in the press nip the respective shoe press roller with a larger radius than that opposite belt runs through the press nip.
  • the volume of Shoe press roller has a higher speed than the opposite belt embossed, which facilitates the removal of the belt of the counter roller.
  • the faster band of the shoe press roller thus acts during the wrinkle formation Direction of the opposite belt against the counter roller.
  • the press nip generally makes at least one water absorbent Ribbon, preferably in the form of a press felt. Because of the lesser Water accumulation in the press nip due to the already significantly increased dry content can at least through the last, the adjacent, extended press nip next to a water absorbent tape, a smooth, waterproof tape in Form a transfer belt. This smooth tape can take the lead significantly improve the fibrous web and rewet because of the, if reduce the low water absorption capacity at all.
  • the transfer belt Since the tensile stiffness of the transfer belt is usually greater than that of the water-absorbing, opposite belt, the transfer belt should be the Wrap the counter roll of the press nip. This allows the train to be built more easily the band of the shoe press roller in the press nip.
  • the adjacent, extended press nips two air-permeable, water-absorbing belts, preferably in the form of press felts.
  • the wrapping in one the separating suction roll is adjustable by changing this band. So for example, during the transfer of the fibrous web, i.e. the introduction of the transfer strip when starting the machine a larger wrap of the Separating suction roller through the belt to be removed than during normal operation can be set.
  • the Fibrous web depending on the type and condition of the fibrous web as well as the requirements for a further press nip or a smoothing nip or a drying group can be handed over.
  • the press arrangement consists of at least two neighboring, extended press nips, each of a shoe press roll 2.4 and one cylindrical counter roll 3.5 are formed.
  • the shoe press rollers 2.4 have to form the extended press nip a flexible roll shell, which by a pressing unit 11 with a concave pressing surface pressed against the counter roller 3.5 becomes.
  • the fibrous web 1 passes from the forming wire 10 of the web running direction 28th upstream formers for press arrangement.
  • Suited guide rollers and separating suction rollers 19, 21, 23, 24, 27 have one perforated roll shell, the interior of which at least in one section with a Vacuum source is connected. This negative pressure causes the suction Fibrous web 1 to the guide roller or separating suction roller 19,21,23,24,27 looping, breathable band 6,7,8.
  • the shoe press rollers 2, 4 of the two adjacent, elongated press nips arranged on different sides of the fibrous web 1 are. Since the bands 7, 8 of the shoe press rolls 2.4 in the press nip have a larger radius than the respective opposite bands 6.9 are curved, this leads to an elongation of the bands 7, 8 of the shoe press rolls 2.4. The result generated expansion and compression ratios of the tapes 7.8 and 6.9 lead to a more stable web guide that reduces wrinkling or even completely is avoided.
  • the fibrous web 1 can also be used to stabilize the position after the press nip performed by both belts 6,7,8,9 together over a sandwich section 29 become.
  • the fibrous web 1 is at least between the neighboring, extended press nips with a belt 7.8 of a shoe press roll 2.4 in Contact.
  • the bands 7, 8 of the shoe press rolls 2.4 are permeable to air and designed to absorb water in the form of press felts. This brings in particular because of the increased water absorption capacity of the shoe press rollers 2.4 as a result advantages of their profiled roller surface.
  • the major part of the drive power is, however, from the drives 12 Counter rolls 3.5 applied and in the appropriate press nip on the belts 6,7,8,9 transferred.
  • the wrap should be when transferring the fibrous web 1, i.e. the start of the machine can be chosen larger, because in this case the run of the Transfer strip or the fibrous web is problematic.
  • the shoe press roll 2 of the first extended press nip is below and the following second press nip arranged over the fibrous web 1.
  • Fibrous web 1 as already described on the upper band 8 of the second Pass shoe press roller 4.
  • the lower, rotating around the counter-roller 5 of the second, extended press nip Volume 9 here is smooth and impermeable to water. This smooth band 9 almost completely excludes rewetting from this side and leads also in the press nip to smooth the side that comes into contact with it the fibrous web 1.
  • Fiber web 1 for example, on a looping around a suction-guided guide roller 19 Hand over dryer fabric 17 to a following dryer group. In the dry group is the fibrous web 1 for drying alternately via heated drying cylinders 18 and guide rollers.
  • the shoe press roll 2 of the first is located extended press nip above and the second press nip below the Fibrous web 1. Accordingly, a smooth, water-impermeable belt 9 around the top counter roll 5. Instead of the smooth band 9 can also be an air-permeable, water-absorbing Volume 9 are provided. The choice essentially depends on the Water accumulation in this press nip.
  • the belt 8 then transfers the fibrous web 1 to, over the fibrous web 1 running, air-permeable belt 16 of a further press nip.
  • This third Press nip is formed by two press rolls 14, 15 and can be used for further Drainage can be used.
  • More than two elongated press nips can also be arranged one behind the other become.

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  • Paper (AREA)
EP03100869A 2002-06-15 2003-04-02 Dispositif de pressage Withdrawn EP1375740A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002126825 DE10226825A1 (de) 2002-06-15 2002-06-15 Pressanordnung
DE10226825 2002-06-15

Publications (1)

Publication Number Publication Date
EP1375740A1 true EP1375740A1 (fr) 2004-01-02

Family

ID=29594555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03100869A Withdrawn EP1375740A1 (fr) 2002-06-15 2003-04-02 Dispositif de pressage

Country Status (2)

Country Link
EP (1) EP1375740A1 (fr)
DE (1) DE10226825A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1777342A1 (fr) * 2005-10-20 2007-04-25 Voith Patent GmbH Agencement de presse
EP1777340A1 (fr) * 2005-10-20 2007-04-25 Voith Patent GmbH Agencement de presse
WO2009092477A1 (fr) * 2008-01-25 2009-07-30 Voith Patent Gmbh Dispositif de fabrication et/ou de traitement d’une bande de matière fibreuse
WO2017129309A1 (fr) * 2016-01-29 2017-08-03 Voith Patent Gmbh Presse pour une machine de fabrication d'une bande de matière fibreuse
WO2020254079A1 (fr) * 2019-06-19 2020-12-24 Voith Patent Gmbh Machine destinée à la fabrication d'une bande de matière fibreuse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999047747A1 (fr) * 1998-03-16 1999-09-23 Valmet-Karlstad Ab Machine a papier et procede de production d'une bande papier
WO2001018309A1 (fr) * 1999-09-07 2001-03-15 Metso Paper Karlstad Aktiebolag Procede et machine a papier utilises pour realiser une couverture
DE10012148A1 (de) * 2000-03-13 2001-09-20 Voith Paper Patent Gmbh Pressanordnung
US20020050330A1 (en) * 2000-10-31 2002-05-02 Voith Paper Patent Gmbh Press arrangement
DE10137527A1 (de) * 2001-08-01 2003-02-13 Voith Paper Patent Gmbh Pressenanordnung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI98843C (fi) * 1995-10-03 1997-08-25 Valmet Corp Menetelmä ja laite veden poistamiseksi paperi- tai kartonkiradasta puristamalla
US5908536A (en) * 1995-10-03 1999-06-01 Valmet Corporation Method and machine for removing water from a paper or board web by pressing
FI115307B (fi) * 2000-11-06 2005-04-15 Metso Paper Inc Esipuristimella varustettu kartonkikoneen puristinosa

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999047747A1 (fr) * 1998-03-16 1999-09-23 Valmet-Karlstad Ab Machine a papier et procede de production d'une bande papier
WO2001018309A1 (fr) * 1999-09-07 2001-03-15 Metso Paper Karlstad Aktiebolag Procede et machine a papier utilises pour realiser une couverture
DE10012148A1 (de) * 2000-03-13 2001-09-20 Voith Paper Patent Gmbh Pressanordnung
US20020050330A1 (en) * 2000-10-31 2002-05-02 Voith Paper Patent Gmbh Press arrangement
DE10137527A1 (de) * 2001-08-01 2003-02-13 Voith Paper Patent Gmbh Pressenanordnung

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1777342A1 (fr) * 2005-10-20 2007-04-25 Voith Patent GmbH Agencement de presse
EP1777340A1 (fr) * 2005-10-20 2007-04-25 Voith Patent GmbH Agencement de presse
WO2009092477A1 (fr) * 2008-01-25 2009-07-30 Voith Patent Gmbh Dispositif de fabrication et/ou de traitement d’une bande de matière fibreuse
WO2017129309A1 (fr) * 2016-01-29 2017-08-03 Voith Patent Gmbh Presse pour une machine de fabrication d'une bande de matière fibreuse
US10612192B2 (en) 2016-01-29 2020-04-07 Voith Patent Gmbh Press for a machine for producing a fibrous material web
WO2020254079A1 (fr) * 2019-06-19 2020-12-24 Voith Patent Gmbh Machine destinée à la fabrication d'une bande de matière fibreuse
CN113994046A (zh) * 2019-06-19 2022-01-28 福伊特专利有限公司 用于制造纤维料幅的机器

Also Published As

Publication number Publication date
DE10226825A1 (de) 2003-12-24

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