EP0985764A2 - Dispositif de pressage - Google Patents

Dispositif de pressage Download PDF

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Publication number
EP0985764A2
EP0985764A2 EP99111760A EP99111760A EP0985764A2 EP 0985764 A2 EP0985764 A2 EP 0985764A2 EP 99111760 A EP99111760 A EP 99111760A EP 99111760 A EP99111760 A EP 99111760A EP 0985764 A2 EP0985764 A2 EP 0985764A2
Authority
EP
European Patent Office
Prior art keywords
press
roll
roller
arrangement according
felt
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Withdrawn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
EP99111760A
Other languages
German (de)
English (en)
Other versions
EP0985764A3 (fr
Inventor
Andreas Meschenmoser
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
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 Paper Patent GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0985764A2 publication Critical patent/EP0985764A2/fr
Publication of EP0985764A3 publication Critical patent/EP0985764A3/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Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a press arrangement for treating a fibrous web, in particular paper or cardboard web, with at least two Press nips, which are assigned at least one common felt, the is guided together with the fibrous web through the press nips.
  • At least one of the two presses has at least one cambered roller.
  • a crowning now leads but especially under pressure, that one or more another felt through the press nip at the edges Running speed is awarded as being in the middle range. So this can Running speed in the middle area in particular be higher than on the edges.
  • Now occurs a different one in the subsequent press nip Speed distribution such as one across the width uniform running speed, so it comes to the edges of one respective felt to a higher tension and thus an elongation, after the felts are usually moved across the full width by train.
  • the aim of the invention is to provide an improved design that is as simple as possible held press arrangement of the type mentioned to create at the danger of felt tension and material web deformation especially with higher press forces and lighter basis weights the material web to be treated is practically excluded.
  • each of the press felt interspersed between two not cambered, at least essentially cylindrical press rolls is formed.
  • Each of them now has a different one from the common A pair of press rolls forming a felt nip, preferably each at least one deflection compensation roller.
  • the press nips in question can also be of at least two felts are interspersed. In this case too, it is guaranteed that the felts in the successive press nips uniform speed is imposed across the machine width.
  • the press nips are interspersed with at least two common felts, in this case the fibrous web passed between two such felts through the press nips is.
  • At least one press nip between a suction press roll is expedient and a deflection compensation roller.
  • the deflection compensation roller preferably as a lower roller intended.
  • At least one press nip is provided which between a shoe press roll and a deflection compensation roll is formed.
  • the deflection compensation roller preferably again provided as a lower roller.
  • Press assembly is a pair of press rolls through a suction press roll and a deflection compensating roll and a pair of press rolls formed by a shoe press roll and a deflection compensation roll, wherein the pair of rollers comprising the suction press roller in the web running direction arranged in front of the pair of rollers comprising the shoe press roller is.
  • the two deflection compensation rollers are expedient here each provided as a lower roller.
  • the press planes to each other are at least substantially parallel and at least in one essentially right angle to the felt run between the two press nips stand.
  • At least two press nips provided with at least one common felt are provided, their press levels with respect to the felt run between the two Press nips are inclined in the same direction, so that they are the same with this one Include angles.
  • This will in particular make felt tension between upper and lower felt as well as air and wrinkle problems, as with known mutually inclined arrangements such as e.g. the so-called Avoid S-beats.
  • the press planes can for example be inclined so that the distance between the axes of the top rollers of the two pairs of press rollers is greater than the distance between the axes of the lower rollers.
  • FIG. 1 shows a press section of a press in a purely schematic representation Machine for producing a fibrous web 10, in the present one Paper or cardboard web.
  • This between a wire section 12 and one Dryer section 14 arranged press section comprises a double press arrangement 16 with two arranged one behind the other in the web running direction L.
  • Press nips S1 and S2 both of a common upper felt 18 and are interspersed with a common bottom felt 20 between which the fibrous web 10 through the two press nips S1 and S2 is passed through.
  • Each of the two is common Felting 18, 20 does not pass through press nips S1, S2 between two cambered, at least substantially cylindrical press rolls 22, 24 and 26, 28 formed.
  • each of the two pairs of press rolls comprises 22, 24 and 26, 28 each have a deflection compensation roller 24 and 28.
  • the relevant deflection compensation roller 24 is an obliquely above assigned to this arranged suction press roll 22.
  • the one about this Suction press roll 22 guided top felt 18 takes over the fibrous web 10 from a wire belt 30, whereupon the fibrous web 10 immediately first press nip S1 is supplied.
  • Both the suction press roll 22 and the deflection compensation roll 24 can each be blind drilled and / or grooved, preferably one drainage of the press nip S1 on both sides by centrifuging To allow water in respective channels 32, 34, one of which Suction press roll 22 and the other of the deflection compensating roll 24 assigned.
  • the deflection compensation roller 28 To form the rear press nip S2 in the web running direction L is the deflection compensation roller 28 in question is a shoe press roller 26 assigned, which in the present case immediately above the deflection compensation roller 28 is arranged.
  • This second press nip S2 the material web 10 together with the upper felt 18 and the lower felt 20 fed, wherein it lies between these two felts 18, 20.
  • the upper felt 20 is transported on by the lower felt 20 Material web 10 separately.
  • the material web 10 From the bottom felt 18 is the material web 10 finally through an upper felt 36 of another shoe press 38, 40 removed, which in the present case is an overhead one Shoe press roll 38 and a deflection compensation roll located below 40 comprises, between which a third press nip S3 is formed.
  • the material web fed through the upper felt 36 of the shoe press 38, 40 10 is a piece after the third press nip S3 guided along the surface of the deflection compensation roller 40 and then placed in free train on a dryer fabric 42 through which it the first drying cylinder 44 of the dryer section 14 is fed.
  • the Upper felt 36 is removed from the material web immediately after the press nip S3 10 separated.
  • Figure 2 shows a schematic representation of the two press nips S1 and S2 of the double press arrangement 16 resulting felt speed profiles. After both presses are not through cambered, at least substantially cylindrical press rolls 22, 24 and 26, 28 are formed, arise in the two press gaps S1 and S2 uniform felt speeds across the machine width.
  • a deflection compensation roll 24 in particular also the suction press roll 22 be cylindrical.
  • the two felts 18, 20 between the two press nips S1 and S2 is also subjected to a train that is uniform across the width.
  • the press assembly 16 operates without any Felt tension or paper deformation, so that ultimately the risk of wrinkles is also eliminated.
  • Figure 3 shows a schematic representation of a further embodiment a double press arrangement 16, in which the press planes E1, E2 of the two press nips penetrated by the common felts 18, 20 S1 and S2 are at least substantially parallel to one another and in one at least substantially right angle to the felt path between the two press gaps S1 and S2.
  • FIG. 16 A further embodiment is shown in a schematic illustration in FIG a double press assembly 16 shown, in which the press planes E1 and E2 of the two common felts 18, 20 enforced press gaps S1 and S2 with respect to the felt run between the two press nips S1 and S2 are inclined in the same direction, so that they with enclose this in the manner shown an equal angle ⁇ .
  • the press planes E1 and E2 are like this inclined that the distance between the axes of the upper rollers 22, 26 of the two pairs of press rolls 22, 24 and 26, 28 is greater than the distance between the axes of the lower rollers 24, 28.
  • FIG. 5 shows a schematic representation of a further embodiment of a double press arrangement 16, in which the upper rolls 22 and 26 or lower rolls 24 and 28 of the pairs of press rolls 22, 24 and 26, 28 wrapped by a respective common felt 18 or 20 form an at least essentially one have the same diameter.
  • the outlet speed v 01 of the upper felt 18 following the first press nip S1 is at least substantially equal to the inlet speed v 02 of this upper felt 18 in the region of the second press nip S2.
  • the outlet speed V u1 of the bottom felt 20 following the first press nip S1 is at least substantially equal to the inlet speed V u2 of this bottom felt 20 in the region of the second press nip S2.
  • the tension of the upper felt 18 is at least substantially equal to the tension of the lower felt 20.

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  • Paper (AREA)
EP99111760A 1998-09-02 1999-06-18 Dispositif de pressage Withdrawn EP0985764A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19840023 1998-09-02
DE1998140023 DE19840023A1 (de) 1998-09-02 1998-09-02 Pressenanordnung

Publications (2)

Publication Number Publication Date
EP0985764A2 true EP0985764A2 (fr) 2000-03-15
EP0985764A3 EP0985764A3 (fr) 2001-06-27

Family

ID=7879585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111760A Withdrawn EP0985764A3 (fr) 1998-09-02 1999-06-18 Dispositif de pressage

Country Status (2)

Country Link
EP (1) EP0985764A3 (fr)
DE (1) DE19840023A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201820A2 (fr) * 2000-10-31 2002-05-02 Voith Paper Patent GmbH Dispositif de pressage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071813A1 (fr) * 1999-05-21 2000-11-30 Valmet-Karlstad Ab Section de presse dotée d'un dispositif stabilisateur de bande
WO2000071812A1 (fr) * 1999-05-21 2000-11-30 Valmet-Karlstad Ab Section de presse dotée d'un dispositif stabilisateur de bande

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2381127A1 (fr) * 1977-02-18 1978-09-15 Valkama Paavo Section de pressage pour enlever l'eau d'une bande de fibres
EP0107606A2 (fr) * 1982-09-29 1984-05-02 Beloit Corporation Procédé de transfert d'une nappe de papier
DE8805966U1 (fr) * 1988-05-05 1989-09-07 J.M. Voith Gmbh, 7920 Heidenheim, De
US5639351A (en) * 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities
EP0803604A1 (fr) * 1996-04-25 1997-10-29 Voith Sulzer Papiermaschinen Gesellschaft mbH Presse humide
DE19633422A1 (de) * 1996-08-20 1998-02-26 Voith Sulzer Papiermasch Gmbh Pressenpartie und Verfahren zum Entwässern einer wässrigen Faserstoffbahn

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821029A1 (de) * 1988-06-22 1990-01-04 Kuesters Eduard Maschf Durchbiegungssteuerbare walze
DE3920176A1 (de) * 1988-12-21 1990-07-05 Escher Wyss Ag Walze und verfahren zu deren betrieb
DE4133562A1 (de) * 1991-10-10 1993-04-22 Voith Gmbh J M Walze mit biegungsausgleich
FI109477B (fi) * 1995-02-02 2002-08-15 Metso Paper Inc Tasauspuristimella varustettu paperikoneen puristinosa
DE19626418A1 (de) * 1996-07-01 1998-01-08 Voith Sulzer Papiermasch Gmbh Preßvorrichtung
DE19652018A1 (de) * 1996-12-13 1998-06-18 Voith Sulzer Papiermasch Gmbh Pressenpartie

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2381127A1 (fr) * 1977-02-18 1978-09-15 Valkama Paavo Section de pressage pour enlever l'eau d'une bande de fibres
EP0107606A2 (fr) * 1982-09-29 1984-05-02 Beloit Corporation Procédé de transfert d'une nappe de papier
DE8805966U1 (fr) * 1988-05-05 1989-09-07 J.M. Voith Gmbh, 7920 Heidenheim, De
US5639351A (en) * 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities
EP0803604A1 (fr) * 1996-04-25 1997-10-29 Voith Sulzer Papiermaschinen Gesellschaft mbH Presse humide
DE19633422A1 (de) * 1996-08-20 1998-02-26 Voith Sulzer Papiermasch Gmbh Pressenpartie und Verfahren zum Entwässern einer wässrigen Faserstoffbahn

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201820A2 (fr) * 2000-10-31 2002-05-02 Voith Paper Patent GmbH Dispositif de pressage
EP1201820A3 (fr) * 2000-10-31 2002-11-20 Voith Paper Patent GmbH Dispositif de pressage
US6521093B2 (en) 2000-10-31 2003-02-18 Voith Paper Patent Gmbh Press arrangement

Also Published As

Publication number Publication date
DE19840023A1 (de) 2000-03-09
EP0985764A3 (fr) 2001-06-27

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