EP0816560A2 - Dispositif de pressage - Google Patents

Dispositif de pressage Download PDF

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Publication number
EP0816560A2
EP0816560A2 EP97106606A EP97106606A EP0816560A2 EP 0816560 A2 EP0816560 A2 EP 0816560A2 EP 97106606 A EP97106606 A EP 97106606A EP 97106606 A EP97106606 A EP 97106606A EP 0816560 A2 EP0816560 A2 EP 0816560A2
Authority
EP
European Patent Office
Prior art keywords
press
grooves
web
pressing
holes
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Withdrawn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
EP97106606A
Other languages
German (de)
English (en)
Other versions
EP0816560A3 (fr
Inventor
Joachim Henssler
Hans Loser
Karl Dr. Steiner
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 Sulzer Papiermaschinen 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 Sulzer Papiermaschinen GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0816560A2 publication Critical patent/EP0816560A2/fr
Publication of EP0816560A3 publication Critical patent/EP0816560A3/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Withdrawn legal-status Critical Current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
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • 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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • 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
    • D21F3/08—Pressure rolls
    • D21F3/086—Pressure rolls having a grooved surface

Definitions

  • the invention relates to a pressing device for treatment a material web, in particular a paper web, with a a pressing element having a substantially smooth pressing surface and one with the press member to form a press nip cooperating counter element, the material web along with one between the web of material and the Counter element running felt tape through the press nip and after leaving the press nip of the Press element is separated.
  • Such pressing devices are known and are for example in paper machines for dewatering Paper webs used.
  • the path to be dewatered along with one between the counter element and the web provided felt tape through the press nip and dewatered, the felt belt being pressed out of the belt Absorbs liquid.
  • the object of the invention is to provide a pressing device type mentioned so that even at high Web speeds slightly different from that Pressing element released and thus the risk of overstretching or tearing of the material web can be minimized.
  • This task is essentially solved in that for support the separation of the material web from the pressing element Grooves and / or holes formed in the pressing surface are in the press nip by the press forces with formation close a smooth surface and leave after leaving open the press nip again.
  • the holes are relatively small, it is due to the fact that when closing the holes or The air contained in them is compressed. The compressed air will then relax again as soon as the holes or grooves after leaving the press nip open again, and this relaxation leads to a Reduction of the between material web and the pressing surface effective adhesive forces, so that the material web easily can be separated from the pressing element.
  • the grooves can be in Extend the web running direction so far that the contained in them Air essentially passes through the press nip is pressed out of the grooves against the direction of web travel and air during opening when leaving the press nip can flow back into the grooves. In this case by the air flowing into the grooves the adhesion of the Material web reduced to the pressing element.
  • the pressing surface i.e. of the Pressing jacket
  • the pressing element from a sufficiently flexible Material.
  • polyurethane is considered Material used for the press jacket.
  • Figures 1 and 2 show a pressing device according to the invention, such as for dewatering a material web 1, in particular a paper web, is used.
  • a pressing device such as for dewatering a material web 1, in particular a paper web, is used.
  • the pressing device include a pressing element 2 with a essentially smooth pressing surface 10 and a counter element 4, that with the pressing element 2 to form a press nip 3rd cooperates through which the material web 1 together with one between the material web 1 and the counter element 4 extending felt tape 5 is guided.
  • the counter element 4 is of a rotating cylindrical Roll formed that is conventional or controlled by deflection can be trained.
  • the pressing element 2 can, as in FIG. 3 shows a concave pressing surface 10, being a press jacket made of flexible material 7 moved about a carrier, not shown, and over at least one support element 9 is supported on this carrier is.
  • pressing element 2 and counter element 4 as a rotating cylindrical Rolls be formed.
  • the pressing element 2 and the counter element 4th have wide press surfaces and each have a flexible jacket.
  • the felt belt 5 forms an endless loop and is over Felt guide rolls 8 out. It is used in front of the press nip 3 Guiding the material web 1.
  • the material web 1 passes through the press nip 3 in the direction of arrows A and is dewatered in the usual way, the liquid pressed from the web 1 from the Felt tape 5 is added.
  • the material of the press cover 7 is so flexible and the holes or grooves 6 are dimensioned so that the holes or grooves 6 through the press forces acting in the press nip 3 to form a smooth surface can be closed and when leaving open the press nip 3 again, as shown in FIG. 2 is indicated.
  • a suitable material for the press jacket 7 is, for example Polyurethane.
  • the holes or grooves 6 can have relatively small dimensions have in the direction of web travel A, so that the contained in them Air trapped and compressed during the closing process becomes. The compressed air will then relax again as soon as the holes or grooves 6 after leaving of the press nip 3 open again, and this relaxation leads to a reduction in between material web 1 and the pressing surface 10 effective adhesive forces, so that the material web 1 can be easily separated from the pressing element 2.
  • the grooves 6 in the web running direction A can extend far that the air they contain at Passing through the press nip 3 essentially against Web running direction A is pressed out of the grooves 6 and 3 air during opening when leaving the press nip can flow back into the grooves 6. In this case by the air flowing into the grooves 6, the adhesion of the Material web 1 reduced to the pressing element 2.
  • the holes or grooves 6 preferably have one Width across the web running direction A from 0.1 to 0.3 mm and a depth of 2 to 5 mm.
  • holes or grooves 6 of two are in the direction of web travel A rows next to each other offset transversely to the web running direction A.

Landscapes

  • Paper (AREA)
  • Replacement Of Web Rolls (AREA)
EP97106606A 1996-07-01 1997-04-22 Dispositif de pressage Withdrawn EP0816560A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19626420A DE19626420A1 (de) 1996-07-01 1996-07-01 Preßvorrichtung
DE19626420 1996-07-01

Publications (2)

Publication Number Publication Date
EP0816560A2 true EP0816560A2 (fr) 1998-01-07
EP0816560A3 EP0816560A3 (fr) 1999-01-13

Family

ID=7798594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97106606A Withdrawn EP0816560A3 (fr) 1996-07-01 1997-04-22 Dispositif de pressage

Country Status (4)

Country Link
US (1) US5914007A (fr)
EP (1) EP0816560A3 (fr)
CA (1) CA2208282A1 (fr)
DE (1) DE19626420A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10037367A1 (de) * 2000-07-31 2002-02-14 Voith Paper Patent Gmbh Pressfilz
US7166195B2 (en) * 2003-07-15 2007-01-23 Albany International Corp. Grooved and perforated layer for use in papermakers' fabric
ZA200604530B (en) * 2003-11-03 2008-01-30 Albany Int Corp Belt with variable grooves
RU2406792C2 (ru) * 2003-11-18 2010-12-20 Олбани Интернешнл Корп. Лента с желобчатой поверхностью, предназначенная для использования в станинном прессе
US8080137B2 (en) 2003-11-18 2011-12-20 Albany International Corp. Shoe press belt having a grooved surface
JP4477025B2 (ja) * 2007-03-12 2010-06-09 イチカワ株式会社 抄紙用シュープレスベルト
JP4972438B2 (ja) * 2007-03-22 2012-07-11 イチカワ株式会社 抄紙用シュープレスベルト
DE102009028215B3 (de) 2009-08-04 2010-09-09 Voith Patent Gmbh Kombination eines Pressfilzes mit einem Presswalzenbezug und/oder einem Saugwalzenbezug für eine Papiermaschine
EP3047067B1 (fr) * 2013-09-20 2017-06-28 Stowe Woodward Licensco LLC Rouleau industriel ayant un revêtement en caoutchouc souple comportant de larges rainures

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2814682A1 (de) * 1978-04-05 1979-10-11 Continental Gummi Werke Ag Presswalze beispielsweise fuer papier-, faerbe- und wringmaschinen o.dgl.
DE3416423A1 (de) * 1983-05-12 1984-11-15 Valmet Oy, Helsinki Papiermaschinenpressenwalze, die mit einem elastischen schichtweise aufgebauten belag versehen ist, und papiermaschinenpresse, in der die genannte pressenwalze eingesetzt wird
EP0241389A1 (fr) * 1986-04-01 1987-10-14 GERLAND STOWE WOODWARD INDUSTRIES BV Société en nom collectif dite : Cylindre de presse destinée notamment à éliminer le liquide d'un matériau en feuille, tel que pâte à papier, élaboré en continu, et presse comportant un tel cylindre

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1925917A (en) * 1932-06-07 1933-09-05 Otto T Chalon Paper press belt
US3198694A (en) * 1964-12-10 1965-08-03 Beloit Corp Press roll assemblies in paper making machine
DE6918845U (de) * 1969-05-09 1970-06-25 Deutsche Linoleum Werke Ag Presswalze
DE2951299A1 (de) * 1979-12-20 1981-07-09 Babcock Textilmaschinen Kg (Gmbh & Co), 2105 Seevetal Waermebehandlungsvorrichtung, insbesondere haengeschleifendaempfer
DE3727563C1 (de) * 1987-08-19 1989-02-09 Voith Gmbh J M Pressmantel einer Entwaesserungspresse fuer Papierherstellungsmaschinen od.dgl.
US5543015A (en) * 1994-10-18 1996-08-06 Tamfelt Corp. Groove configuration for a press belt in an extended nip press
US5700356A (en) * 1996-01-19 1997-12-23 Lefkowitz; Leonard R. Air permeable belt for dewatering web in press nip

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2814682A1 (de) * 1978-04-05 1979-10-11 Continental Gummi Werke Ag Presswalze beispielsweise fuer papier-, faerbe- und wringmaschinen o.dgl.
DE3416423A1 (de) * 1983-05-12 1984-11-15 Valmet Oy, Helsinki Papiermaschinenpressenwalze, die mit einem elastischen schichtweise aufgebauten belag versehen ist, und papiermaschinenpresse, in der die genannte pressenwalze eingesetzt wird
EP0241389A1 (fr) * 1986-04-01 1987-10-14 GERLAND STOWE WOODWARD INDUSTRIES BV Société en nom collectif dite : Cylindre de presse destinée notamment à éliminer le liquide d'un matériau en feuille, tel que pâte à papier, élaboré en continu, et presse comportant un tel cylindre

Also Published As

Publication number Publication date
US5914007A (en) 1999-06-22
EP0816560A3 (fr) 1999-01-13
CA2208282A1 (fr) 1998-01-01
DE19626420A1 (de) 1998-01-08

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