EP0857820B1 - Section de pressage - Google Patents

Section de pressage Download PDF

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Publication number
EP0857820B1
EP0857820B1 EP98101130A EP98101130A EP0857820B1 EP 0857820 B1 EP0857820 B1 EP 0857820B1 EP 98101130 A EP98101130 A EP 98101130A EP 98101130 A EP98101130 A EP 98101130A EP 0857820 B1 EP0857820 B1 EP 0857820B1
Authority
EP
European Patent Office
Prior art keywords
press
fibrous web
felt
nip
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
EP98101130A
Other languages
German (de)
English (en)
Other versions
EP0857820A2 (fr
EP0857820A3 (fr
Inventor
Gerhard Kotitschke
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 EP0857820A2 publication Critical patent/EP0857820A2/fr
Publication of EP0857820A3 publication Critical patent/EP0857820A3/fr
Application granted granted Critical
Publication of EP0857820B1 publication Critical patent/EP0857820B1/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
    • D21F2/00—Transferring continuous webs from wet ends to press sections
    • 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 consisting of at least one press nip for drainage the fibrous web, with the fibrous web on both sides through the press nip at least one endless press felt runs and the fibrous web of a volume of an upstream unit with the help of one of one of the two Press felts wrapped take-off roller is taken over.
  • Such a press section is known from EP 159 280.
  • the Fibrous web by means of an upper one guided over a take-off roller Felt web removed.
  • Another felt web is immediately behind the Removal roller brought up to the fibrous web and the fibrous web then one between the two felt webs through a first press nip Long nip press led. Then the fibrous web continues to arrive between two felt tracks in a shoe press, from which the Fibrous web is guided to a subsequent drying unit.
  • the inlet angle of the Fibrous web in the first press nip is constant and not accordingly conditions such as basis weight, dryness or type of fiber can be varied. As a result, especially at high Web running speeds Wrinkles occur in the fibrous web. This depends on the size of the inlet wedge between the lower roller and the lower felt and in this infeed wedge through the lower felt Fibrous web compressed air.
  • the object of the invention is therefore to provide a press section in which the Inlet angle of the fibrous web in the press nip can be varied.
  • the inlet angle can be adjusted via the generally vertically adjustable guide roller the fibrous web with its press felts easily depending on the Operating conditions can be varied. This enables you to influence the possibly in the inlet wedge between the press felt and the roller towards the fibrous web compressed air.
  • the use of a suction guide roller prevented also the introduction of air into the inlet gusset between press felt and guide roller.
  • the second press felt at a relatively short distance behind the take-off roller is fed, swinging of the press felts can be avoided. It can also be used in cases where the above Fibrous web running press felt the fibrous web from the upstream Unit takes over a loosening of the fibrous web prevented by this press felt become.
  • the press section consists of two press nips 2, 10 for Drainage of the fibrous web 1, d. H. a paper web, passing through the first Press nip 2 an endless press felts 3, 4 runs on both sides of the fibrous web 1 and the upper press felt 3 the fibrous web 1 from a belt 5 in the form of a sieve of an upstream former takes over. This is supported by one from the top Press felt 3 wrapped and vacuumed take-off roller 6.
  • This guide roller 7 is with at an angle of about 30 ° from the upper press felt 3 and is to opposite press felt 4 out, d. H. here essentially vertically adjustable, whereby the lower press felt 4 at least affects the guide roller 7.
  • one in front of the guide roller 7 in the direction of web travel arranged, but wrapped by the lower press felt 4 guide roller 19 in position is adjustable. This not only allows the wrap angle to be varied of the lower press felt 4 with respect to the guide roller 7, but also leading the lower press felt 4 from the guide roller 7 under certain operating conditions.
  • the aspirated guide roller 7 thus not only enables an adjustment of the inlet angle the fibrous web 1 with respect to the first press nip 2, but also the suction the existing between the upper press felt 3 and the fibrous web 1 and in the inlet gusset between the upper press felt 3 and the guide roller 7 entrained air. As a result, the fibrous web 1 becomes between the two Press felts 3, 4 held, with at least a reduced risk of wrinkling in the Press nip 2 performed.
  • the fibrous web 1 is by means of one of the lower Press felt 4 wrapped, suction guide roll separated from the upper press felt 3 what the rewetting at least reduced.
  • the first press nip 2 is one shoe press roller 8 arranged above and a lower one, essentially cylindrical counter-roller 9 is formed.
  • the transfer takes place from the lower press felt 4 an upper press felt 11 of the following press, also from an above arranged shoe press roll 12 and a lower, substantially cylindrical Counter roll 13 is formed. This is supported by one of the upper press felt 11 looped, suctioned guide roller.
  • a lower press felt is also formed by the second extended press nip 10 17 out.
  • the upper press felt 11 is also removed and the fibrous web 1 in known form to a drying wire 16 of a following Pass the dryer section.
  • waterproof tape 15 passed through the second press nip 10. This tape 15 counteracts the rewetting, especially since the upper press felt 11 immediately after Press nip 10 can be guided away.
  • the lower one Band 15 are brought up to the fibrous web 1. This is done via a positionally variable guide roller 14, which is wrapped by the belt 15 and before the second Press nip 10 is arranged.
  • the shoe press rolls 8, 12 consist in both examples of a flexible Roller jacket, which is guided over a press shoe with a concave contact surface.
  • the Pressure is generally hydraulic and lubrication between press shoe and roll shell on hydrostatic and / or hydrodynamic Wise.
  • the vacuumed rollers have a perforated roller shell inside Negative pressure is generated. This is done either through a direct connection to a Vacuum source or by vacuuming the area around the vacuumed roller from the outside.

Landscapes

  • Paper (AREA)
  • Resistance Heating (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (7)

  1. Section de presse d'une machine pour la fabrication d'une nappe fibreuse (1) se composant d'au moins une ligne de contact (2) pour la déshydratation de la nappe fibreuse (1), à chaque fois au moins un feutre de presse sans fin (3, 4) s'étendant à travers la ligne de contact (2) de part et d'autre de la nappe fibreuse (1), et la nappe fibreuse (1) étant reprise par une bande (5) d'une unité montée avant à l'aide d'un cylindre récepteur (6) entouré par les deux feutres de presse (3),
    caractérisée en ce que
    un cylindre conducteur (7) pourvu d'une aspiration est disposé entre le cylindre récepteur (6) et la ligne de contact (2) dans la boucle du feutre de presse (3) reprenant la nappe fibreuse (1) de la bande (5), le cylindre conducteur (7) est entouré par ce feutre de presse (3) et le cylindre conducteur (7) est déplaçable vers le feutre de presse opposé (4), le feutre de presse opposé (4) étant au moins tangent au cylindre conducteur (7).
  2. Section de presse selon la revendication 1,
    caractérisée en ce que
    la ligne de contact (2) est la première ligne de contact de la section de presse et la nappe fibreuse (1) est reprise par une bande (5) en forme de tamis de la forme montée avant.
  3. Section de presse selon la revendication 1 ou 2,
    caractérisée en ce que
    le feutre de presse (3) s'étendant au-dessus de la nappe fibreuse (1) reprend la nappe fibreuse (1) de l'unité montée avant.
  4. Section de presse selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le feutre de presse (4) s'étendant sous la nappe fibreuse (1) transfère la nappe fibreuse (1) à une unité suivante.
  5. Section de presse selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la ligne de contact (2) est réalisée de manière prolongée et est formée de préférence par un cylindre de presse à sabot (8) et un cylindre conjugué cylindrique (9).
  6. Section de presse selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'unité suivante est formée par une autre ligne de contact (10) de préférence prolongée.
  7. Section de presse selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le feutre de presse (3) reprenant la nappe fibreuse (1) d'une unité montée avant entoure le cylindre conducteur (7) avec un angle de 5 à 60°, de préférence de 15 à 45° et le feutre de presse opposé (4) entoure le cylindre conducteur (7) avec un angle de 0 à 30°, de préférence de 0 à 15°.
EP98101130A 1997-01-28 1998-01-23 Section de pressage Expired - Lifetime EP0857820B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29701382U 1997-01-28
DE29701382U DE29701382U1 (de) 1997-01-28 1997-01-28 Pressenpartie einer Papiermaschine

Publications (3)

Publication Number Publication Date
EP0857820A2 EP0857820A2 (fr) 1998-08-12
EP0857820A3 EP0857820A3 (fr) 1999-06-02
EP0857820B1 true EP0857820B1 (fr) 2002-12-11

Family

ID=8035124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101130A Expired - Lifetime EP0857820B1 (fr) 1997-01-28 1998-01-23 Section de pressage

Country Status (4)

Country Link
US (1) US6090244A (fr)
EP (1) EP0857820B1 (fr)
AT (1) ATE229590T1 (fr)
DE (3) DE29701382U1 (fr)

Families Citing this family (11)

* 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
DE19801891A1 (de) * 1998-01-20 1999-07-22 Voith Sulzer Papiertech Patent Pressenpartie
SE511667C2 (sv) † 1998-03-16 1999-11-08 Valmet Karlstad Ab Pappersmaskin och sätt för framställning av en pappersbana
EP0950757A3 (fr) * 1998-04-15 2001-01-10 Voith Paper Patent GmbH Dispositif de pressage
DE19919051A1 (de) 1999-04-27 2000-11-02 Voith Sulzer Papiertech Patent Die Pressenpartie
DE19934875A1 (de) * 1999-07-24 2001-01-25 Voith Paper Patent Gmbh Papiermaschine
ATE332408T1 (de) 2000-03-13 2006-07-15 Voith Paper Patent Gmbh Pressanordnung
DE10012148A1 (de) * 2000-03-13 2001-09-20 Voith Paper Patent Gmbh Pressanordnung
DE10053935A1 (de) * 2000-10-31 2002-05-08 Voith Paper Patent Gmbh Pressenanordnung
DE102005048927A1 (de) * 2005-10-13 2007-04-19 Voith Patent Gmbh Pressanordnung
FI20075039L (fi) * 2007-01-22 2008-07-23 Metso Paper Inc Rainanmuodostuskoneen formeriosalla tai puristinosalla oleva järjestelmä kudoksen ja edelleen rainan ohjaamiseksi ohjausteloilla sekä vastaava menetelmä

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198697A (en) * 1964-06-26 1965-08-03 Beloit Corp Paper press roll assemblies
US3600275A (en) * 1968-05-23 1971-08-17 Beloit Corp Web pickup
SE374150B (fr) * 1970-03-17 1975-02-24 Ahlstroem Oy
US4075056A (en) * 1974-08-15 1978-02-21 Beloit Corporation Press section structure
US4483745A (en) * 1982-09-29 1984-11-20 Beloit Corporation Method and apparatus of sheet transfer using a nonporous smooth surfaced belt
US4561939A (en) * 1984-03-26 1985-12-31 Beloit Corporation Extended nip press arrangement
DE3708191A1 (de) * 1987-03-13 1988-09-22 Voith Gmbh J M Nasspresse
JPH01501074A (ja) * 1987-04-14 1989-04-13 ヨット　エム　フォイト　ゲーエムベーハー 繊維材料ウエブを形成するための機械
DE3815278A1 (de) * 1988-05-05 1989-11-16 Voith Gmbh J M Pressenpartie einer maschine zur herstellung einer faserstoffbahn, insbesondere papierbahn
US5328569A (en) * 1992-06-26 1994-07-12 Beloit Technologies, Inc. Curved suction box apparatus in a papermaking machine press section
FI114227B (fi) * 1995-04-24 2004-09-15 Metso Paper Inc Paperikone, jossa on puristinosa ja kuivatusosa
DE29701382U1 (de) * 1997-01-28 1997-03-20 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Pressenpartie einer Papiermaschine

Also Published As

Publication number Publication date
DE59806571D1 (de) 2003-01-23
ATE229590T1 (de) 2002-12-15
DE29701382U1 (de) 1997-03-20
EP0857820A2 (fr) 1998-08-12
EP0857820A3 (fr) 1999-06-02
DE29800330U1 (de) 1998-04-23
US6090244A (en) 2000-07-18

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