EP1452642A1 - Dispositif pour la production d'une bande fibreuse - Google Patents

Dispositif pour la production d'une bande fibreuse Download PDF

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Publication number
EP1452642A1
EP1452642A1 EP04100610A EP04100610A EP1452642A1 EP 1452642 A1 EP1452642 A1 EP 1452642A1 EP 04100610 A EP04100610 A EP 04100610A EP 04100610 A EP04100610 A EP 04100610A EP 1452642 A1 EP1452642 A1 EP 1452642A1
Authority
EP
European Patent Office
Prior art keywords
fibrous web
separating element
roller
wire
guide element
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.)
Ceased
Application number
EP04100610A
Other languages
German (de)
English (en)
Inventor
Martin Vogt
Christoph Haase
Günter Dr. Halmschlager
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 EP1452642A1 publication Critical patent/EP1452642A1/fr
Ceased 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
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
    • D21F11/04—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

Definitions

  • the invention relates to a device for producing a fibrous web, in particular a paper web, from a fiber suspension with a twin wire former, the first and the second interacting sieve belts having.
  • Such a device is from DE 44 02 274 A1 (PB10044 DE) of the applicant known.
  • the known device is suitable for forming a multilayer or multi-layer paper or cardboard web. The situation changes a third sieve merged with another layer.
  • the device is located in the one formed by the first and the second sieve belt Twin-wire zone in the loop of one wire a drainage box, which has the rigid strips touching a sieve.
  • In the loop of the other sieves are some support strips that can be pressed onto the other sieve as well as in the loop of one of the two screens a forming roller, which with this sieve forms a looping zone.
  • the forming roller has a smooth, closed roller shell, and the outer belt in the wrap zone separates from the at a distance from the end of the looping zone Web and the inner screen belt .
  • this object is achieved in a device of the type mentioned kind solved in that in the area of the outlet side of the twin wire former a separating element is attached to one of the sieve belts and holds the fibrous web stops on the first screen belt.
  • This device ensures a stable run of fibrous web in the device guaranteed.
  • the device is particularly advantageous at web and wire speeds of more than 800 m / min, especially at speeds of more than 1,000 m / min and especially at speeds of 1,100 m / min and more.
  • the device is particularly advantageous if the areal mass is less than 80 g / m 2 .
  • the separating element is a Suction shoe with a straight or curved surface.
  • the separating element is a suction roller, in particular a solid jacket roller.
  • the separating element is a rotating one, in particular waterproof, tape.
  • the tape is so fine-pored that it is exclusively let the air through. This ensures that the separating element does not perform a drainage function that only with the help of the drainage boxes or bars should be reached.
  • the guide element is in front of the separating element in the running direction of the fibrous web arranged downstream or opposite. Depending on the chosen one Arrangement can optimal separation of the fibrous web from one of the two sieves can be reached.
  • the guide element a blow roller, in particular a solid jacket roller, or a sliding shoe is. So there are both fixed elements and moving elements to help separate the fibrous web from the wire.
  • the guide element is arranged immersed in the fibrous web, the Separation also facilitated by the geometry of the arrangement.
  • the separating element can also enter the fiber web plane be immersed. This ensures that the fibrous web wraps around the separating element and the guide element in an S-shape.
  • a twin wire former 1 (FIG. 1) is mounted above a wire former L, to make a two-ply paper web together with it.
  • a headbox STA1 feeds a first one consisting of an endless belt Sieve belt D1 with a stock suspension that runs over a pre-dewatering section VE with a plurality of drainage boxes arranged one behind the other is drained.
  • a second roller is also used as a swiveling roller 2
  • Endless belt formed sieve belt D2 can be pivoted towards the sieve belt D1.
  • the sieve belts or sieves D1 and D2 sandwich the fiber suspension on.
  • the drainage arrangement ZE comprises one arranged within the sieve D2 Multi-part suction box with drainage strips running across the entire width of the web 3, with drainage strips arranged on the underside of sieve D1 4 interact.
  • the drainage strips attached to the top are, for example fixedly attached, while those attached to the underside of the fibrous web Drainage strips 4 elastic against the fiber suspension can be pressed, the contact pressure by means of, for example, from DE 299 16 627 U1 (PB10960 DEG) regulated by the applicant's known control unit becomes.
  • the fibrous web is then smoothed over a forming roller FW Surface led. Even after leaving the forming roller FW, the Fiber suspension in the sandwich between sieves D1 and D2.
  • the Fiber suspension in the sandwich between sieves D1 and D2 is a separating element TE, which the fiber suspension sucks on the sieve D1, so that it is stronger on this than adheres to the screen D2 and is carried along by the screen D1.
  • the separating element TE is a suction shoe with a reference flat surface to the fiber suspension.
  • the surface can also be convex be curved so that they are more in the center of the fibrous web Direction to this protrudes.
  • the separating element TE is included as a suction roller a rotating jacket, under which one or more suction boxes Suction boxes are arranged.
  • the separating element can also be a Be full roller. In both cases, the lateral surface has holes, through which the fiber suspension is sucked in.
  • the separating element is a circulating belt through that the fibrous web is sucked in. This is particularly impermeable to water, so that it has no draining effect on the fiber suspension, but only sucks them in.
  • the separating element TE is a guide element LE in the direction of rotation of the sieves D1, D2 downstream, the separation process of the pulp suspension from the sieve D2 supports by blowing compressed air onto the fibrous web.
  • the guide element LE is a Roller.
  • the roller is either a solid jacket roller with holes in the jacket surface, is blown out by the compressed air, or it has one a fixed core rotating jacket with holes, in which An arrangement for generating the compressed air is arranged inside the roller. If the roller is a solid jacket roller, the compressed air is over, for example a rotating union in the shaft of the roller.
  • the fiber suspension is attached to a Fourdrinier wire L via a rubber element GE introduced.
  • a STA2 fed fiber suspension a second, via drainage boxes 5 dewatered paper layer generated with that supplied from the sieves D1, D2 Fibrous suspension is brought together.
  • D1 dewatered paper layer generated with that supplied from the sieves D1, D2 Fibrous suspension is brought together.
  • it will be Screen D2 on a roller 6 from which the wire L is guided upwards, while the two layers of paper remain on the Fourdrinier wire L and for the next Processing to be transported.
  • headboxes STA3 and STA4 arranged in the same direction in order to be able to use a twin wire former Sieve D1 and D2 and by means of the Fourdrinier wire L to a two-ply fibrous web form.
  • it passes from the STA3 headbox onto the screen D1 fiber suspension first a pre-dewatering section VE, then a bilateral drainage ZE with the sieves D1, D2 on both sides arranged drainage strips 4, 5 and is then over a forming roller FW managed.
  • a separating element TE which in this arrangement is inside the sieve loop of the sieve D2 is attached, but otherwise the same Have configurations as with the aid of the exemplary embodiment explained in FIG. 1 can.
  • a guide element LE arranged within the sieve loop of the sieve D1.
  • the fibrous web runs out of the seven D1, D2 attached to one on the same side as the separating element TE Rubber element GE over and merges with the paper layer on the Fourdrinier wire L.
  • a roller 7 is slidable to determine the tension of the screen D2 arranged.
  • FIG. 3 is the same arrangement of the headboxes STA1, STA2 and the sieves D1, D2 and the Fourdrinier wire L, as in FIG. 2 shown, the separating element TE as pivotable via a pivoting device 8 Role trained. As a result, it can be pivoted in the direction of the screen D1, so that the sieve D2 over part of the circumference of the lateral surface of the separating element TE is guided along. In this case, too, the separating element additionally immerse in the course of sieve D1. Especially at This arrangement can dispense with a guide element, but it can also be present his.

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  • Paper (AREA)
EP04100610A 2003-03-01 2004-02-16 Dispositif pour la production d'une bande fibreuse Ceased EP1452642A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10309050 2003-03-01
DE2003109050 DE10309050A1 (de) 2003-03-01 2003-03-01 Vorrichtung zur Herstellung einer Faserstoffbahn

Publications (1)

Publication Number Publication Date
EP1452642A1 true EP1452642A1 (fr) 2004-09-01

Family

ID=32748142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04100610A Ceased EP1452642A1 (fr) 2003-03-01 2004-02-16 Dispositif pour la production d'une bande fibreuse

Country Status (2)

Country Link
EP (1) EP1452642A1 (fr)
DE (1) DE10309050A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000100A1 (de) * 1979-01-12 1980-07-24 Valmet Oy Verfahren und vorrichtung zur behandlung einer faserstoffbahn
DE4031038A1 (de) * 1990-10-01 1992-04-09 Escher Wyss Gmbh Vorrichtung zum herstellen eines mehrlagigen papiers oder kartons
WO2001031120A1 (fr) * 1999-10-29 2001-05-03 Metso Paper, Inc. Dispositif pour partie humide de machine a papier
US6361654B1 (en) * 2000-04-26 2002-03-26 Kimberly-Clark Worldwide, Inc. Air knife assisted sheet transfer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000100A1 (de) * 1979-01-12 1980-07-24 Valmet Oy Verfahren und vorrichtung zur behandlung einer faserstoffbahn
DE4031038A1 (de) * 1990-10-01 1992-04-09 Escher Wyss Gmbh Vorrichtung zum herstellen eines mehrlagigen papiers oder kartons
WO2001031120A1 (fr) * 1999-10-29 2001-05-03 Metso Paper, Inc. Dispositif pour partie humide de machine a papier
US6361654B1 (en) * 2000-04-26 2002-03-26 Kimberly-Clark Worldwide, Inc. Air knife assisted sheet transfer

Also Published As

Publication number Publication date
DE10309050A1 (de) 2004-09-23

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