EP1111126B1 - Section de presse - Google Patents

Section de presse Download PDF

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Publication number
EP1111126B1
EP1111126B1 EP00123972A EP00123972A EP1111126B1 EP 1111126 B1 EP1111126 B1 EP 1111126B1 EP 00123972 A EP00123972 A EP 00123972A EP 00123972 A EP00123972 A EP 00123972A EP 1111126 B1 EP1111126 B1 EP 1111126B1
Authority
EP
European Patent Office
Prior art keywords
press
shoe
section according
equal
backing roll
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.)
Expired - Lifetime
Application number
EP00123972A
Other languages
German (de)
English (en)
Other versions
EP1111126A3 (fr
EP1111126A2 (fr
Inventor
Thomas Thoröe Scherb
Harald Schmidt-Hebbel
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 EP1111126A2 publication Critical patent/EP1111126A2/fr
Publication of EP1111126A3 publication Critical patent/EP1111126A3/fr
Application granted granted Critical
Publication of EP1111126B1 publication Critical patent/EP1111126B1/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
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper

Definitions

  • the invention relates to a press section of a machine for production of tissue webs with a shoe press unit and a counter roller comprehensive shoe press, the shoe press unit at least two Press shoes and a flexible, liquid-tight guided over these press shoes Press belt has.
  • DE 32 05 664 A1 already has one for use in, for example a press section of a paper machine certain shoe roll with at least two press shoes known.
  • the press shoes are one by one Press plane parallel axis pivotable, and they can be in the Distinguish the radius of curvature. This ensures that for the whole Thickness spectrum of the types of paper produced on a paper machine optimal press work, i.e. the highest possible dry content can be achieved.
  • the aim of the invention is to provide a press section of the type mentioned to create, which enables a more economical production of tissue while ensuring better product quality.
  • the two Press shoes have different lengths measured in the direction of web travel and each between a rest position and a pressing position are shiftable, in which the respective press shoe is opposite the counter roller.
  • Tissue products have different quality requirements depending on their use posed. So there are products for which the specific Volume ("bulk”) is a crucial quality characteristic. With others Products may be more important for economic reasons, a little lower specific volume in favor of a high dry content, i.e. high production. Because of the invention Training is now possible in tissue production to switch between these varieties without this regarding the Machine or press setting a compromise must, as has been the case up to now. It is now possible to choose the optimal one Realize situation.
  • a shoe press unit is preferably a shoe press roll with a the press jacket forming the press belt is provided.
  • At least one press shoe is provided, its in the web running direction measured length greater than 80 mm, ⁇ 100 mm, preferably ⁇ 120 mm is.
  • the maximum pressing pressure is in a press nip between the press shoe and the counter roll in the web running direction Pressure course preferably less than or equal to a value of about 2.5 MPa selected, in particular ⁇ 2 MPa, preferably ⁇ 1.5 MPa.
  • At least one press shoe is provided whose length measured in the direction of web travel is less than or equal to 60 mm and in particular less than or equal to 50 mm and preferably one Has a value in the range of approximately 37 mm.
  • the maximum is Pressing pressure in a nip between the press shoe and the Counter roll in the web running direction resulting pressure course at a Shoe length less than or equal to 60 mm, preferably greater than or equal to one Value of 3.3 MPa, with a shoe length less than or equal to 50 mm preferably greater than or equal to a value of 4.3 MPa and at one Shoe length in the range of about 37 mm is preferably equal to a value selected in the range of about 4.8 MPa.
  • a heated drying cylinder serves as the counter roller and in particular a so-called Yankee cylinder is provided is that in the event that the shoe press unit by a Shoe press roll is formed, a much larger diameter than has the shoe press roll.
  • the maximum line force is due to inadmissibly large deformations and tensions of the Yankee cylinder often to a value of about 90 kN / m to 120 limited kN / m. This again limits the maximum pressing pressure for one long press shoe designed for high bulk and thus the one for the tissue web maximum achievable dryness. The result is a reduction the machine speed and a higher drying effort on the drying cylinder. By using a Shoe press with at least two different press shoes avoided this disadvantage.
  • a further increase in the dry matter content can be achieved that one between the shoe press unit and the counter roller, preferably a drying cylinder, formed felted press nip Angle between that applied to the counter roll at the end of the press nip Tangent and at least one running out of the press nip Felt advantageously ⁇ 10 °, in particular ⁇ 15 °, in particular ⁇ 18 ° and is preferably ⁇ 20 °.
  • Press belt have a circumferentially grooved surface that leads to a contributes to an additional increase in dryness.
  • a grooved press belt is therefore preferred when tissue types are used with the tissue machine are produced in which it is mainly due to high dryness arrives.
  • Figures 1 and 2 each show a machine in a schematic representation for producing a tissue web 10 (see also FIG. 3), the Press section includes a shoe press 12, one here by a Shoe press roll 14 formed shoe press unit and a counter roll which, in the case of the embodiments according to the figures 1 and 3 around a drying cylinder 16 and in the embodiment 2 is a conventional counter roll 18.
  • the shoe press rolls 14 each have two opposite one another Press shoes 20, 20 'and a guide over these press shoes 20, 20', formed by a flexible, liquid-tight press belt 22 on.
  • the two press shoes 20, 20 ' have a respective shoe press roll 14 different lengths l, l 'measured in the web running direction L (cf. in particular Figure 3). They are also each between a rest position R and a press position P, in which the respective press shoe 20, 20 'of the counter roll 16, 18 opposite.
  • the longer press shoe 20 can, for example, in the web running direction L measured length l greater than 80 mm. If the relevant press nip between such a press shoe 20 and the counter roller 16, 18th formed, so the maximum pressing pressure resulting in the press nip Pressure course in particular less than or equal to a value of approximately 2.5 MPa should be selected. In this case, a high specific volume can be achieved.
  • the maximum pressing pressure is in one Press nip between this press shoe 20 'and the counter roll 16, 18 in Web running direction L resulting pressure curve with a shoe length smaller or equal to 60 mm advantageously greater than or equal to a value of about 3.3 MPa, preferably with a shoe length less than or equal to 50 mm greater than or equal to a value of approximately 4.3 MPa and at one Shoe length in the range of about 37 mm is preferably equal to a value selected in the range of about 4.8 MPa. In such a case, a relative high dryness can be achieved.
  • a heated drying cylinder 16 and in particular, a so-called Yankee cylinder can be provided, the Diameter much larger than the diameter of the shoe press roll 14 is.
  • the one formed in particular by a drying cylinder or Yankee cylinder Counter roller 16 is assigned a scraper 34 through which the tissue web 10 is scraped off after drying.
  • the counter roll 18 is passed through formed a normal roller.
  • a top felt 36 and a Bottom felt 38 out are a top felt 36 and a Bottom felt 38 out.
  • the tissue web to be formed is through the upper felt 36 taken from a screen 42 coming from the wire section 40 and fed to the shoe press 12. Following this is the tissue web fed through the same top felt 36 to a drying cylinder 44.
  • the Press jacket 22 of the shoe press 14 preferably has in this case a circumferentially grooved surface.
  • the press belt 22 can in particular be blind-drilled and / or be grooved.
  • the two press shoes 20, 20 'can e.g. on a gunslinger 50 or the like is provided and jointly adjustable via this (see in particular Figures 2 and 3).

Landscapes

  • Paper (AREA)
  • Resistance Heating (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (12)

  1. Section de presse d'une machine de fabrication de nappes de tissu (10) comprenant une presse à sabot (12) comportant une unité de presse à sabot (14) et un rouleau conjugué (16, 18), dont l'unité de presse à sabot (14) présente au moins deux sabots de presse (20, 20') et une bande de pressage (22) flexible, étanche aux liquides, guidée sur ces sabots de presse (20, 20'),
    caractérisée en ce que
    les deux sabots de presse (20, 20') possèdent des longueurs (l, l') différentes mesurées dans la direction d'avance de la nappe (L) et peuvent être décalés à chaque fois entre une position de repos (R) et une position de pressage (P) dans laquelle le sabot de presse (20, 20') est en regard du rouleau conjugué (16, 18).
  2. Section de presse selon la revendication 1,
    caractérisée en ce que
    l'on prévoit comme unité de presse à sabot un rouleau de presse à sabot (14) avec une enveloppe de pressage (22) formant la bande de pressage.
  3. Section de presse selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'on prévoit au moins un sabot de presse (20) dont la longueur (l) mesurée dans la direction d'avance de la nappe (L) est supérieure à 80 mm.
  4. Section de presse selon la revendication 3,
    caractérisée en ce que
    la pression de pressage maximale de la courbe de pression produite dans une fente de pressage entre le sabot de presse (20) et le rouleau conjugué (16, 18) dans la direction d'avance de la nappe (L) est choisie inférieure ou égale à une valeur d'environ 2,5 MPa.
  5. Section de presse selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'on prévoit au moins un sabot de presse (20') dont la longueur (l') mesurée dans la direction d'avance de la nappe (L) est inférieure ou égale à 60 mm et en particulier est inférieure ou égale à 50 mm et de préférence a une valeur dans la région d'environ 37 mm.
  6. Section de presse selon la revendication 5,
    caractérisée en ce que
    dans le cas d'une longueur de sabot (l') inférieure ou égale à 60 mm, la pression de pressage maximale de la courbe de pression produite dans une fente de pressage entre le sabot de presse (20') et le rouleau conjugué (16, 18) dans la direction d'avance de la nappe (L) est choisie supérieure ou égale à une valeur d'environ 3,3 MPa.
  7. Section de presse selon la revendication 5,
    caractérisée en ce que
    dans le cas d'une longueur de sabot (l') inférieure ou égale à 50 mm, la pression de pressage maximale de la courbe de pression produite dans une fente de pressage entre le sabot de presse (20') et le rouleau conjugué (16, 18) dans la direction d'avance de la nappe (L) est choisie supérieure ou égale à une valeur d'environ 4,3 MPa.
  8. Section de presse selon la revendication 5,
    caractérisée en ce que
    dans le cas d'une longueur de sabot (l') dans la région d'environ 37 mm, la pression de pressage maximale de la courbe de pression produite dans une fente de pressage entre le sabot de presse (20') et le rouleau conjugué (16, 18) dans la direction d'avance de la nappe (L) est choisie égale à une valeur dans la plage d'environ 4,8 MPa.
  9. Section de presse selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'on prévoit comme rouleau conjugué un cylindre de séchage chauffable (16) et notamment ce qu'on appelle un cylindre Yankee.
  10. Section de presse selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la fente de pressage formée entre l'unité de presse à sabot (14) et le rouleau conjugué (16, 18), de préférence un cylindre de séchage (16), est feutrée et en ce que l'angle (α) entre la tangente (46) appliquée à l'extrémité de la fente de pressage contre le rouleau conjugué (16, 18) et au moins un feutre (48) sortant de la fente de pressage est ≥ 10°, notamment ≥ 15°, en particulier ≥ 18° et de préférence ≥ 20°.
  11. Section de presse selon la revendication 10,
    caractérisée en ce que
    la bande de pressage (22) possède une surface rainurée dans la direction périphérique.
  12. Section de presse selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la bande de pressage (22) est pourvue d'alésages bornes et/ou est rainurée.
EP00123972A 1999-12-23 2000-11-03 Section de presse Expired - Lifetime EP1111126B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19962706 1999-12-23
DE19962706A DE19962706A1 (de) 1999-12-23 1999-12-23 Pressenpartie

Publications (3)

Publication Number Publication Date
EP1111126A2 EP1111126A2 (fr) 2001-06-27
EP1111126A3 EP1111126A3 (fr) 2001-08-16
EP1111126B1 true EP1111126B1 (fr) 2004-12-08

Family

ID=7934296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00123972A Expired - Lifetime EP1111126B1 (fr) 1999-12-23 2000-11-03 Section de presse

Country Status (7)

Country Link
US (1) US6514385B2 (fr)
EP (1) EP1111126B1 (fr)
AT (1) ATE284465T1 (fr)
BR (1) BRPI0006405A2 (fr)
CA (1) CA2329497C (fr)
DE (2) DE19962706A1 (fr)
PL (1) PL196245B1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10129613A1 (de) * 2001-06-20 2003-01-02 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Herstellung einer mit einer dreidimensionalen Oberflächenstruktur versehenen Faserstoffbahn
DE10158717A1 (de) * 2001-11-29 2003-06-12 Voith Paper Patent Gmbh Presswalze
DE10233920A1 (de) * 2002-07-25 2004-02-12 Voith Paper Patent Gmbh Schuhpresse
DE10326304A1 (de) * 2003-06-11 2005-02-03 Voith Fabrics Patent Gmbh Verfahren und Vorrichtung zur Herstellung einer Tissuebahn
US7297233B2 (en) * 2004-01-30 2007-11-20 Voith Paper Patent Gmbh Dewatering apparatus in a paper machine
SE529130C2 (sv) * 2004-05-26 2007-05-08 Metso Paper Karlstad Ab Pappersmaskin för framställning av mjukpapper, metod för framställning av mjukpapper samt mjukpapper
DE102004048156A1 (de) * 2004-10-02 2006-04-06 Voith Paper Patent Gmbh Pressvorrichtung in einer Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn
AT505760B1 (de) * 2008-01-09 2009-04-15 Andritz Ag Maschf Vorrichtung und verfahren zur entwasserung einer materialbahn
AT508331B1 (de) * 2009-05-19 2011-05-15 Andritz Ag Maschf Verfahren und vorrichtung zur behandlung einer faserstoffbahn in einer langnip-presseinheit
JP5716378B2 (ja) * 2010-12-17 2015-05-13 王子ホールディングス株式会社 繊維シートの製造装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205664A1 (de) * 1982-02-17 1983-08-25 J.M. Voith Gmbh, 7920 Heidenheim Presse zur entwaesserung nasser faserstoffbahnen
DE3317456C2 (de) * 1983-04-02 1993-12-02 Voith Gmbh J M Bandpreßeinheit zum Entwässern von Faserstoffbahnen
DE3503819A1 (de) * 1984-12-21 1986-06-26 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Hydraulischer pressschuh sowie dessen verwendung und betrieb
US5639351A (en) 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities
FI98844C (fi) * 1991-12-23 1997-08-25 Valmet Paper Machinery Inc Paperikoneen puristinosa, etenkin painopaperilaaduille
DE4301750C2 (de) * 1993-01-23 1996-10-10 Voith Gmbh J M Verfahren und Vorrichtung zum Entwässern einer Bahn mittels Pressen
DE19652018A1 (de) * 1996-12-13 1998-06-18 Voith Sulzer Papiermasch Gmbh Pressenpartie
DE19654198A1 (de) * 1996-12-23 1998-06-25 Voith Sulzer Papiermasch Gmbh Maschine zur Herstellung einer Faserstoffbahn
DE19756422A1 (de) * 1997-12-18 1999-06-24 Voith Sulzer Papiertech Patent Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue-Papierbahn

Also Published As

Publication number Publication date
US6514385B2 (en) 2003-02-04
DE50008900D1 (de) 2005-01-13
CA2329497C (fr) 2009-02-10
PL196245B1 (pl) 2007-12-31
CA2329497A1 (fr) 2001-06-23
DE19962706A1 (de) 2001-06-28
PL344740A1 (en) 2001-07-02
EP1111126A3 (fr) 2001-08-16
EP1111126A2 (fr) 2001-06-27
ATE284465T1 (de) 2004-12-15
BRPI0006405A2 (pt) 2017-01-17
US20020096302A1 (en) 2002-07-25

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