EP0669423B1 - Section de formage à double toile - Google Patents

Section de formage à double toile Download PDF

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Publication number
EP0669423B1
EP0669423B1 EP94120938A EP94120938A EP0669423B1 EP 0669423 B1 EP0669423 B1 EP 0669423B1 EP 94120938 A EP94120938 A EP 94120938A EP 94120938 A EP94120938 A EP 94120938A EP 0669423 B1 EP0669423 B1 EP 0669423B1
Authority
EP
European Patent Office
Prior art keywords
screen
double
section according
roller
forming
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
EP94120938A
Other languages
German (de)
English (en)
Other versions
EP0669423A1 (fr
Inventor
Udo Grossmann
Konrad Rickelt
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 Sulzer Papiermaschinen GmbH
Original Assignee
Voith Sulzer Papiermaschinen 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 filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0669423A1 publication Critical patent/EP0669423A1/fr
Application granted granted Critical
Publication of EP0669423B1 publication Critical patent/EP0669423B1/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
    • 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
    • D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers
    • 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 twin wire section for forming a fibrous web from a fiber suspension, in particular for forming a layer of a multilayer paper or cardboard web.
  • DE 40 31 038 shows a twin wire former, the Twin-wire zone begins with a first group of drainage strips, then transferred to a forming roll with the twin wire zone over the forming roller runs out and ends up running over a vacuumed box, after which the two twin sieves separate.
  • This design strives for the highest possible moisture content when leaving the Forming roller to ensure a high gap strength of the multilayered web achieve. There is a risk here that in the script described "jagged waterline" in the tips too wet fabric up to Gummi point reaches and is squeezed there.
  • DE 44 02 273 A1 shows a paper machine for producing a multilayer Paper web with at least two twin wire formers, the outer sides have the most uniform paper properties possible.
  • US 4,207,144 shows and describes the wet end of a paper machine a headbox, a subsequent pre-dewatering section, which is made up of a single sieve and then a twin sieve zone, formed from the said sieve and an outer enveloping it Sieve.
  • This device only has scrapers in the pre-dewatering zone on. However, it does not contain rigid drainage strips in one Sieve loop and also no flexible drainage strips another sieve loop.
  • the object of the invention is achieved in that the tips on the Forming roller are drained more, i.e. becomes a jagged waterline straightened and no too wet material gets to the rubber area.
  • Farther constructive configurations are specified (claims 4-12), the one result in a considerable reduction in the overall height and thus cost-saving Act.
  • claim 17 a radical reduction in the overall length and structurally favorable arrangement in the building, in which the lower sieve in the basement and the delivery point just above the Paper machine floor is specified.
  • the twin wire zone directly on the Forming roller does not end at a distance afterwards because the outer wire runs off the forming roller in front of the inner sieve. Because the forming roller is smooth and is not open, the web continues safely with the inner screen. The Risk of damage to the train as a result of minimal The speed difference between the two sieves is therefore this Smaller version because the sieves separate before e.g. as a consequence of Differences in tension between the two screens, a shift between the web and gives the seven.
  • FIG. 1 shows a twin wire former according to the invention in connection with a Fourdrinier machine for the production of a two-ply paper web. It is in the lower area, a fourdrinier wire L is shown, on which in a known manner one-sided drainage a first layer of paper is produced. About that a twin-wire former with a first is arranged Sieve D1 and a second sieve D2 shown. The first sieve D1, on top of that a headbox STA stock suspension is abandoned, drained via a Pre-drainage section VE the abandoned stock suspension.
  • Pre-dewatering section VE is the second sieve D2 over a pivotable Roll fed
  • the two screens D1 and D2 subsequently the Sandwich the pre-dewatered stock suspension and make one double-sided drainage ZE with the help of across the entire web width running drainage ledges.
  • This bilateral drainage can proceed in any known manner. In the example case are on the Fixed strips attached at the top, in the gaps on the opposite side drainage strips that can be pressed on elastically are provided.
  • the paper web guided between the twin sieves over the forming roller smooth surface FW guided, the screen D2 from the paper web triggers while the screen D1 is still against the forming roller FW, whereby a the paper web remains securely on the screen D1.
  • Figure 2 shows a sketch of a similar design as Figure 1.
  • the corresponding reference numerals specified The difference between the twin-wire section of Figure 1 and Figure 2 consists essentially of the design of the two-sided Drainage ZE.
  • Figure 2 follows by opposite Drainage strips formed double-sided, flat drainage one Series of fixed drainage strips in the loop of the sieve D2 arranged fixed drainage strips, the one after the twin sieve give a curved course at the top.
  • Figure 3 also shows an arrangement similar to Figure 1 and Figure 2, but with the difference that the flat, double-sided drainage ZE in the loop of the sieve D1 a formation shoe curved downwards is connected downstream, which is then followed by the forming roller FW.
  • FIG 4 shows a situation of a wire section, in which also a two-layer Paper web is created by placing stock suspension over a headbox a first screen D1 is placed.
  • a pre-drainage VE begins with the one-sided drainage of the first layer.
  • the twin-wire web of D1 and D2 then one Forming roller with a smooth surface FW is supplied, from which the Screen D1 separates in the manner according to the invention while screen D2 is still on rests on the surface, so that the paper web continues with the screen D2.
  • the screen D2 is then another over a deflection roller Headbox fed to the already formed web a new one Feeds stock suspension and transferred directly to a second twin-wire section.
  • both layers of paper are then placed on the Sieve D2 lying at a transfer point to a further belt B forwarded.
  • Figure 5 shows a situation similar to Figure 3, but is the curved one Forming shoe FS from Figure 3 in this case by a one-sided Drainage via rigid strips on the drainage box E, which one straight line of the sieve, replaced. Furthermore, one straight-line pre-drainage VE is dispensed with, and the stock suspension becomes according to a gap former directly between the sieves D1 and D2, the run over a breast roller, initiated.
  • FIG. 6 shows a twin-wire section according to the invention for producing a two-ply paper, with a first sieve D1 stock suspension is abandoned and pre-dewatered via a pre-drainage line VE becomes.
  • a second sieve D2 is connected to the sieve D1 from above Pre-dewatering section VE supplied from above, so that the two screens D1 and D2 sandwich the resulting paper web.
  • Directly to the Merging the two screens D1 and D2 closes a two-sided Drainage ZE1, after which the sandwich-like sieves over a forming roller FW are redirected.
  • the sieve D1 detaches from the Paper web and the screen D2, while the screen D2 is still on the Forming roller FW rests so that the paper web remains on the wire D2.
  • the sieve D2 together with the first layer lying thereon is Paper web fed to a second twin-wire section, with new material over a headbox is inserted into a gap through the screen D2 and a screen D3 coming from above is formed.
  • the a first drainage of the newly added stock suspension is one Breast roll BW provided in the loop of the sieve D2.
  • the breast roller BW can also be suctioned.
  • the drainage strips in the sieve loop D2 exemplary can be pressed elastically onto the screen D2, while those in the screen D3 arranged drainage strips are provided fixed.
  • the twin sieve is over a Drainage box E with fixed drainage strips inside the Sieve loop D2 guided and then passed through a separating suction, the one easy separation of the sieve D3 from the sieve D2 and those on it allows lying paper web.
  • the screen D2 guides the paper web continue to a transfer point, from which the paper web with the help of a belt B is directed for further processing.

Landscapes

  • Paper (AREA)
  • Electroluminescent Light Sources (AREA)
  • Gas-Filled Discharge Tubes (AREA)

Claims (18)

  1. Section de formage à double toile avec une première toile sans fin et une deuxième toile sans fin(D1, D2) servant à former une bande continue de matière fibreuse à partir d'une suspension de fibres, en particulier à former une couche d'une bande continue de papier ou de carton à plusieurs couches, la première couche étant jointe à une autre couche sur une troisième toile, avec les particularités suivantes :
    dans la zone à double toile, formée par la première toile et la seconde toile (D1, D2)se trouve dans le passant de l'une des toiles une boíte d'essorage (ZE), qui présente des barreaux rigides (en contact avec l'une des toiles) et dans le passant de l'autre toile quelques barreaux d'appui pouvant être pressés de façon flexible sur l'autre toile, ainsi que dans le passant de l'une des deux toiles un cylindre de formage (FW), qui forme avec cette toile une zone d'enroulement,
    caractérisée par les particularités suivantes :
    le cylindre de formage (FW) a une enveloppe lisse et fermée,
    la toile extérieure (D2) dans la zone d'enroulement se sépare, à une certaine distance avant la fin de la zone d'enroulement de la bande continue et de la toile intérieure (D1).
  2. Section de formage à double toile, selon la revendication 1,
    caractérisée en ce qu'
    elle contient un formage à fente.
  3. Section de formage à double toile, selon la revendication 1,
    caractérisée en ce qu'
    elle est un formage hybride (avec une toile inférieure longue et une toile supérieure courte).
  4. Section de formage à double toile selon la revendication 3,
    caractérisée par les particularités suivantes :
    l'une des toiles (ici la toile supérieure) passe sur un cylindre pour toile, montés sur des leviers pivotants, dans la zone à double toile,
    la boíte d'essorage est fixée sur les leviers pivotants (et de cette façon elle peut pivoter en même temps que le cylindre pour toile.
  5. Section de formage à double toile selon la revendication 4,
    caractérisée par les particularités suivantes :
    les montrants pivotants qui servent à recevoir les leviers de pivotement sont disposés seulement à une petite distance du "plan de formage" de la toile inférieure et "en aval" de la boíte d'essorage,
    les extrémités extérieures des leviers de pivotement qui portent les paliers du cylindre pour toile prennent appui sur le bâti de la toile inférieure ou un portique qui l'entoure.
  6. Section de formage à double toile selon la revendication 5,
    caractérisée en ce que
    les extrémités extérieures des leviers de pivotement reposent sur un système d'appui variable en hauteur.
  7. Section de formage à double toile selon la revendication 5 ou 6,
    caractérisée en ce que
    les leviers de pivotement présentent à peu près la forme d'un L couché.
  8. Section de formage à double toile selon la revendication 7,
    caractérisée en ce que
    l'axe de pivotement se trouve à l'extrémité de la branche courte et le palier du cylindre pour toile à l'extrémité de la branche longue.
  9. Section de formage à double toile selon la revendication 7 ou 8,
    caractérisée en ce qu'
    un dispositif de levage, qui agit sensiblement dans le sens horizontal, vient en prise à peu près au milieu de la branche longue.
  10. Section de formage à double toile selon l'une des revendications 1 à 9,
    caractérisée en ce que
    l'on dispose un cylindre de régulation de toile supérieure en dessous du "plan de formage" de la toile inférieure.
  11. Section de formage à double toile selon l'une des revendications 1 à 9,
    caractérisée en ce que
    l'on dispose un cylindre de tension de toile supérieure en dessous du "plan de formage" de la toile inférieure.
  12. Section de formage à double toile selon l'une des revendications 1 à 9,
    caractérisée en ce que
    le "point" le plus élevé (P) du trajet de la toile supérieure se trouve seulement à une distance égale à une fois à deux fois le diamètre (D) du cylindre pour toile (monté sur les leviers de pivotement) au dessus du "plan de formage" (F) de la toile inférieure.
  13. Section de formage à double toile selon l'une des revendications 1 à 12,
    caractérisée en ce que
    les toiles (D1, D2) circulent sur des sections au moins à peu près rectilignes de la zone des barreaux de soutien mentionnés au cylindre de formage (FW).
  14. Section de formage à double toile selon l'une des revendications 1 à 12,
    caractérisée en ce que
    les toiles (D1, D2) circulent au dessus d'une boíte d'essorage additionnelle (E), bombée vers le bas et qui se trouve dans la toile supérieure, en direction du cylindre de formage (FW).
  15. Section de formage à double toile selon l'une des revendications 1 à 12,
    caractérisée en ce que
    les toiles (D1, D2) circulent au dessus d'une boíte d'essorage additionnelle (E), bombée vers le haut et qui se trouve dans la toile inférieure, en direction du cylindre de formage (FW).
  16. Section de formage à double toile selon l'une des revendications 1 à 12,
    caractérisée en ce que
    les toiles (D1, D2)partent en direction du bas du cylindre de formage (FW).
  17. Section de formage à double toile selon l'une des revendications 1 à 12,
    caractérisée en ce que
    les toiles (D1, D2)partent en direction du haut du cylindre de formage (FW).
  18. Section de formage à double toile selon la revendication 17,
    caractérisée en ce que
    la toile intérieure (D2) (dans la zone d'enroulement du cylindre de formage) forme au dessus du cylindre de formage (FW) avec la troisième toile (D3) une deuxième zone de formage à double toile ,
    un distributeur additionnel de matière est associé à son coin d'introduction et,
    la toile intérieure mentionnée guide la bande continue vers un point d'enlèvement (B).
EP94120938A 1994-01-27 1994-12-30 Section de formage à double toile Expired - Lifetime EP0669423B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4402274 1994-01-27
DE4402274A DE4402274C2 (de) 1994-01-27 1994-01-27 Doppelsiebpartie

Publications (2)

Publication Number Publication Date
EP0669423A1 EP0669423A1 (fr) 1995-08-30
EP0669423B1 true EP0669423B1 (fr) 1998-07-01

Family

ID=6508751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120938A Expired - Lifetime EP0669423B1 (fr) 1994-01-27 1994-12-30 Section de formage à double toile

Country Status (8)

Country Link
US (1) US5584967A (fr)
EP (1) EP0669423B1 (fr)
JP (1) JPH07300790A (fr)
CN (1) CN1117100A (fr)
AT (1) ATE167908T1 (fr)
CA (1) CA2141280A1 (fr)
DE (1) DE4402274C2 (fr)
FI (1) FI112098B (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4402274C2 (de) * 1994-01-27 1995-04-06 Voith Gmbh J M Doppelsiebpartie
US5935382A (en) * 1996-05-31 1999-08-10 Valmet-Karlstad Ab Method and board machine for manufacturing a paperboard web
DE19651493A1 (de) * 1996-12-11 1998-06-18 Voith Sulzer Papiermasch Gmbh Siebpartie und Verfahren zum Formen einer mehrlagigen Faserstoffbahn
WO2001044569A1 (fr) * 1999-12-15 2001-06-21 Metso Paper, Inc. Agencement et procede de formation d'une bande de papier ou de carton multicouches
SE516329C2 (sv) * 1999-12-15 2001-12-17 Metso Paper Karlstad Ab Arrangemang och förfarande för formning av en flerskiktad pappers- eller kartongbana
DE10129761A1 (de) * 2001-06-20 2003-01-02 Voith Paper Patent Gmbh Siebpartie und Verfahren zur Bildung einer Faserstoffbahn aus einer Faserstoffsuspension in einer Siebpartie einer Papier- oder Kartonmaschine
KR100419382B1 (ko) * 2001-07-04 2004-02-19 주식회사 이페이퍼텍 다층기능지 제조방법 및 장치와 그 결과물
KR20010096675A (ko) * 2001-07-05 2001-11-08 최정헌 다층기능지 제조방법과 장치 및 그 결과물
DE10257296A1 (de) * 2002-12-07 2006-02-02 Voith Paper Patent Gmbh Doppelsiebformer
US7879192B2 (en) * 2006-05-22 2011-02-01 Paperchine Inc. Multiply former apparatus
DE102007000771A1 (de) 2007-09-26 2009-04-02 Voith Patent Gmbh Doppelsiebformer
JP5283409B2 (ja) * 2008-03-25 2013-09-04 大王製紙株式会社 段ボール用ライナーの製造方法
JP2009293138A (ja) * 2008-06-03 2009-12-17 Daio Paper Corp 段ボール用中芯原紙の製造方法
DE102009000696A1 (de) 2009-02-06 2010-08-12 Voith Patent Gmbh Verfahren zur Herstellung einer mehrlagigen Faserstoffbahn und Blattbildungsvorrichtung zur Durchführung des Verfahrens
US10280565B2 (en) 2016-02-26 2019-05-07 Ecolab Usa Inc. Drainage management in multi-ply papermaking
CN110735351A (zh) * 2019-11-21 2020-01-31 中冶美利云产业投资股份有限公司 一种配有顶网成型器的长网造纸机

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US3876498A (en) * 1973-09-14 1975-04-08 Beloit Corp Controlled forming wire separation on impervious roll of twin-wire papermaking machine
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US4207144A (en) * 1976-10-20 1980-06-10 J. M. Voith, Gmbh Papermaking machines
US4146424A (en) * 1977-06-08 1979-03-27 Beloit Corporation Twin wire former with wire orientation control
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DE4402274C2 (de) * 1994-01-27 1995-04-06 Voith Gmbh J M Doppelsiebpartie

Also Published As

Publication number Publication date
FI950337A0 (fi) 1995-01-26
CN1117100A (zh) 1996-02-21
FI112098B (fi) 2003-10-31
ATE167908T1 (de) 1998-07-15
US5584967A (en) 1996-12-17
FI950337A (fi) 1995-07-28
DE4402274C2 (de) 1995-04-06
EP0669423A1 (fr) 1995-08-30
DE4402274A1 (de) 1994-06-16
CA2141280A1 (fr) 1995-07-28
JPH07300790A (ja) 1995-11-14

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