EP1225271A2 - Presse - Google Patents

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Publication number
EP1225271A2
EP1225271A2 EP01127881A EP01127881A EP1225271A2 EP 1225271 A2 EP1225271 A2 EP 1225271A2 EP 01127881 A EP01127881 A EP 01127881A EP 01127881 A EP01127881 A EP 01127881A EP 1225271 A2 EP1225271 A2 EP 1225271A2
Authority
EP
European Patent Office
Prior art keywords
press
belt
fibrous web
web
blanket
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Withdrawn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
EP01127881A
Other languages
German (de)
English (en)
Other versions
EP1225271A3 (fr
Inventor
Oswald Satzger
Rüdiger Dr. Kurtz
Karl Dr. Steiner
Ulrich Begemann
Gerhard Kotitschke
Thomas Augscheller
Georg Dr. Kleiser
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 EP1225271A2 publication Critical patent/EP1225271A2/fr
Publication of EP1225271A3 publication Critical patent/EP1225271A3/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Withdrawn legal-status Critical Current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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/02—Mechanical driving arrangements

Definitions

  • the invention relates to a press for treating a paper, cardboard, tissue or another fibrous web with at least one formed by two press rolls Press nip through which a belt runs on both sides next to the fibrous web, whereby the fibrous web together after the press nip over a sandwich stretch both tapes and associated tax procedures.
  • Such presses for dewatering fibrous webs have long been known and especially in the version with long press nips with a high drainage capacity connected.
  • the sandwich route also guarantees high web speeds secure guidance of the fibrous web.
  • the drive power is mainly from a press roller and possibly the order this press roll applied running tape.
  • the fibrous web is subjected to different loads Belt speeds up to damage to the fibrous web being able to lead. They also have differences in the tension between the two Tapes also have different adhesion behavior between the fibrous web and the tapes and a shear load on the web resulting in safe guidance the fibrous web after the sandwich route is difficult and the quality is impaired. It can e.g. B. Wrinkles and wrinkles occur. Particularly disadvantageous the tension differences of the belts in the sandwich area affect one Shoe press, due to the long, intensive pressing time.
  • the object of the invention is therefore in these presses the disadvantages mentioned counteract.
  • both bands outside at least one belt drive is assigned to the press nip.
  • Both bands reduce the differences in tension and speed between the bands significantly, which reduces the stress on the fibrous web and improved their adhesive behavior with respect to the tapes.
  • the press nip should be in the direction of web travel be extended and preferably by a shoe press roll and one cylindrical counter roll are formed.
  • the Water squeezed out in the press nip should have at least one, preferably both Tapes can be designed as air-permeable, water-absorbing press felts.
  • Suitable as belt drives are particularly those wrapped around the respective belt Guide rollers.
  • the drive power can also be achieved via other devices, for example, a press nip assigned only to the relevant band into the Ribbon can be introduced.
  • a belt should be led away from the fibrous web after the sandwich stretch become.
  • This strip can advantageously be led away from at least one of the sandwich sections downstream guide roller are driven.
  • the belt should guide the fiber web alone together with the external fibrous web, preferably a driven one Loop the guide roller.
  • the band guiding the fibrous web alone should be air-permeable, water-absorbent Press felt formed and sucked the guide roller wrapped by it his.
  • the belt it is also possible for the belt to guide the fibrous web alone as not or only slightly water-absorbing and not or only slightly air-permeable transfer belt is formed.
  • the belt guiding the fibrous web alone can in both cases Fibrous web to a take-off element, preferably in the form of another band to hand over. It is advantageous here if the band after delivery of the fibrous web is guided over a driven guide roller.
  • the transfer of the fibrous web can also be supported in that the band taking over the fibrous web is made moist and / or less airtight is as the releasing band.
  • the belt drives of each belt following the press nip should depend on the tension and / or the speed of the belts can be controlled. This sets of course the measurement of the tension or the speed of the tapes in the critical Area d. H. in the sandwich route and then ahead. In particular, should this is done with the belt drives immediately following the sandwich section.
  • the fibrous web after the sandwich stretch alone leading belt after the press nip a higher speed than before the press nip and / or that the fibrous web after the sandwich stretch alone leading band after the press nip a higher tensile stress in Have web running direction than before the press nip.
  • the Belt speed after the press nip up to 4% higher preferably is between 0.1 and 0.3% higher than in front of the press nip and / or the tension of the Band up to 6 KN / m higher, preferably between 0.2 and 1.2 KN / m higher than is in front of the press nip.
  • the tape in the form of the press felt after the sandwich section a fixed one together with the external fibrous web and looped around the suction-guiding element.
  • This guide element is on the press felt facing side perforated, the interior being connected to a vacuum source is.
  • the guide roller should be in the area moving the other tape at a lower speed than that, arranged after the delivery of the fibrous web guide roller. This increases the tension of the leading belt in the section between the Guide rollers. As a result, the adhesion of the fibrous web to the belt improves that counteracts plucking of the edge when the other band is led away becomes.
  • the press here consists of only one press nip, but without any problems further identical or different press arrangements can follow.
  • the press nip is by a shoe press roller 6 and a driven, cylindrical counter roller 7 formed.
  • the shoe press roll 6 consists of a flexible roll shell, which over pressed a pressure shoe with a concave pressure surface to the counter roller 7 becomes.
  • the driven counter roll 7 is here from the fibrous web 1 after the Sandwich stretch wrapped alone leading band 3. However, it is also possible that the counter roller 7 is wrapped in the other belt 2.
  • the fibrous web 1 a band 2, 3 on both sides in the form of an air-permeable and water-absorbent Press felt led through the press nip.
  • the press felts are used for absorption and the removal of the water squeezed out in the press nip.
  • the fibrous web 1 after the press nip a sandwich section 11 performed jointly by both belts 2, 3.
  • the upper band 2 here is guided away from the fibrous web 1. Then this belt 2 wraps around a driven guide roller 8, which thereby acts as a belt drive 4.
  • the fibrous web alone guides band 3 together with the external fibrous web 1 a driven and vacuumed guide roller 9.
  • This vacuumed guide roller 9 has a perforated roller jacket, whose interior is connected to a vacuum source. This suction increases the adhesion of the fibrous web 1 to the leading belt 3.
  • the leading belt 3 then transfers the fibrous web 1 to a removal element 12 in the form of a, wrapped around a driven and vacuumed guide roller Belt, especially a press felt or a dryer fabric of a following Unit of the paper machine.
  • the belt 3 After delivery of the fibrous web 1, the belt 3 is also driven by a Guide roller 10 out.
  • the speed of the belts is used to control or regulate the belt drives 4 2,3 detected by sensors 13.
  • the measurement results of these sensors 13 are fed to a control unit 14.
  • This control unit 14 influences the belt drives 4 in the form of the guide rollers 8,9,10. This is done directly in the sandwich section 11 following belt drives 4 such that the outgoing from the belts 2, 3 Strain on the fibrous web 1 is minimized. That means that in the Sandwich section 11 aimed at approximately the same speed for both belts 2, 3 becomes. This affects thrust and frictional forces between the fibrous web 1 and against the bands 2, 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
EP01127881A 2001-01-19 2001-11-23 Presse Withdrawn EP1225271A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10102535A DE10102535A1 (de) 2001-01-19 2001-01-19 Presse
DE10102535 2001-01-19

Publications (2)

Publication Number Publication Date
EP1225271A2 true EP1225271A2 (fr) 2002-07-24
EP1225271A3 EP1225271A3 (fr) 2002-08-28

Family

ID=7671217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01127881A Withdrawn EP1225271A3 (fr) 2001-01-19 2001-11-23 Presse

Country Status (3)

Country Link
US (1) US20020096303A1 (fr)
EP (1) EP1225271A3 (fr)
DE (1) DE10102535A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017129309A1 (fr) * 2016-01-29 2017-08-03 Voith Patent Gmbh Presse pour une machine de fabrication d'une bande de matière fibreuse

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022120745A1 (de) 2022-08-17 2023-08-24 Voith Patent Gmbh Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9205636U1 (de) * 1992-04-25 1992-06-11 J.M. Voith Gmbh, 7920 Heidenheim Preßvorrichtung zur Entwässerung einer Faserbahn mit Preßfilzantrieb
EP0705937A1 (fr) * 1994-10-06 1996-04-10 Valmet Corporation Section de presse dans une machine à papier comportant une presse d'égalisation
US5868904A (en) * 1993-12-08 1999-02-09 Valmet Corporation Press section employing an extended nip press with suction counter roll
DE20100509U1 (de) * 2000-11-03 2001-06-13 Voith Paper Patent Gmbh Schuhpresse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI93237C (fi) * 1993-06-11 1995-03-10 Valmet Tampella Inc Menetelmä ja laite paperi- tai kartonkikoneessa veden poistamiseksi rainasta
US6030499A (en) * 1993-06-11 2000-02-29 Valmet Corporation Method and apparatus in a paper or board machine for dewatering the web
FI112391B (fi) * 1993-12-08 2003-11-28 Metso Paper Inc Paperikoneen puristinosa, jossa käytetään pitkänippipuristinta
US6368466B1 (en) * 1993-12-08 2002-04-09 Valmet Corporation Press section of a paper making machine employing an extended nip press
US5876565A (en) * 1994-10-06 1999-03-02 Valmet Corporation Press section with an equalizing nip for compensating for elongation of a paper web

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9205636U1 (de) * 1992-04-25 1992-06-11 J.M. Voith Gmbh, 7920 Heidenheim Preßvorrichtung zur Entwässerung einer Faserbahn mit Preßfilzantrieb
US5868904A (en) * 1993-12-08 1999-02-09 Valmet Corporation Press section employing an extended nip press with suction counter roll
EP0705937A1 (fr) * 1994-10-06 1996-04-10 Valmet Corporation Section de presse dans une machine à papier comportant une presse d'égalisation
DE20100509U1 (de) * 2000-11-03 2001-06-13 Voith Paper Patent Gmbh Schuhpresse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017129309A1 (fr) * 2016-01-29 2017-08-03 Voith Patent Gmbh Presse pour une machine de fabrication d'une bande de matière fibreuse
CN108699770A (zh) * 2016-01-29 2018-10-23 福伊特专利有限公司 用于制造纤维料幅的机器的压榨机

Also Published As

Publication number Publication date
DE10102535A1 (de) 2002-07-25
US20020096303A1 (en) 2002-07-25
EP1225271A3 (fr) 2002-08-28

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