EP1365067A1 - Section de formage - Google Patents

Section de formage Download PDF

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Publication number
EP1365067A1
EP1365067A1 EP03101443A EP03101443A EP1365067A1 EP 1365067 A1 EP1365067 A1 EP 1365067A1 EP 03101443 A EP03101443 A EP 03101443A EP 03101443 A EP03101443 A EP 03101443A EP 1365067 A1 EP1365067 A1 EP 1365067A1
Authority
EP
European Patent Office
Prior art keywords
sheet forming
forming device
range
former
sheet
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
EP03101443A
Other languages
German (de)
English (en)
Inventor
Alfred Dr. Bubik
Jürgen Prössl
Erich Brunnauer
Martin Vogt
Karl Müller
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 EP1365067A1 publication Critical patent/EP1365067A1/fr
Ceased legal-status Critical Current

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    • 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
    • D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers

Definitions

  • the invention relates to a sheet forming device for producing a multilayer Paper or cardboard web from several fed by means of headboxes Fibrous material suspensions, consisting of a primary longitudinal screen and two as twin wire formers trained secondary sieves, the first layer of the multilayer Place the paper or cardboard web on a second layer of the primary longitudinal screen, wherein the twin wire former has a forming roller as a deflection roller for the Has course of the secondary screens, wherein in the direction of the twin wire former in front of the forming roller, a last former is arranged in the lower wire and a Suction box ("D-part") is arranged in the area of the last in the top wire.
  • a forming roller as a deflection roller for the Has course of the secondary screens
  • the device for producing a multi-layer paper or cardboard comprises a primary longitudinal screen and a secondary longitudinal screen arranged above it in the form of a twin wire former, which places an upper layer of the multi-layer paper or cardboard on a lower layer, the twin wire former having a forming roller as a deflection roller for the course of the twin wire , A pressure bar former is arranged in the direction of travel of the twin wire in front of the forming roller and the so-called water line of the fiber suspension lies in the area of the forming roller.
  • twin-wire former designed as a secondary longitudinal wire both creates an insufficient formation and only removes a limited amount of water with the result of poor strength.
  • speeds> 600 m / min the fine particles contained in the fiber suspension are washed out.
  • this object is achieved in a device of the aforementioned type in that at least one headbox with a nozzle space, in which lamellae are arranged, is provided and that at least one fiber stock suspension fed to at least one headbox has a stock density in the range from 0.2% to 1. 1% and has a filler content in the range from 0% to 80%.
  • the arrangement of lamellae in the nozzle area of at least one headbox markedly improves the formation of the layer to be produced and, given the material density, ensures that such high turbulence is maintained down to the corresponding sieve, so that refloculation of the fiber suspension is largely avoided.
  • This sheet forming device according to the invention is particularly suitable for Manufacture of testliner or linerboard.
  • the headbox has a gap width in the range of 6 mm to 40 mm.
  • the slats end before the end of the nozzle in particular in the range from 10 mm to 100 mm before the end of the nozzle, and / or that the fins in the area of the end of the nozzle ends and / or that the fins protrude beyond the nozzle end. All three embodiments favor the preservation of the high turbulence mentioned at a relatively low cost.
  • the strip former arranged in the lower sieve has between 1 and 4 pressure strips, which are preferably at least partially elastically supported. Due to the elastic support of the pressure bars, the drainage pressure can be easily adapted to different operating parameters.
  • the suction box arranged in the top wire has a maximum box length of 1200 mm and / or that the forming roller of the twin wire former has a diameter in the range from 0.5 m to 1.7 m, preferably from 0.9 m to 1.4 m, and / or that the bottom wire of the twin wire former has a pre-dewatering section whose length assumes a value in the range from 1 m to 12 m, preferably from 3 m to 10 m.
  • the dewatering in the twin-wire former is in the range from 15% to 60%, since among other things a very good formation is achieved with removal of an increased amount of water with the result of good strength.
  • At least one breast roll Sheet forming device is provided with a shaking device which Breast roller with a shaking index in the range from 200 mm / (min • m) to 15,000 mm / (min • m), preferably from 1,250 mm / (min • m) to 6,000 mm / (min • m), shakes.
  • a shaking device which Breast roller with a shaking index in the range from 200 mm / (min • m) to 15,000 mm / (min • m), preferably from 1,250 mm / (min • m) to 6,000 mm / (min • m), shakes.
  • At least one headbox of the sheet forming device can also be used a sectioned substance density control (dilution water technology) his.
  • This design of the headbox creates the possibility the throughput, the consistency and thus the basis weight and the To be able to regulate fiber orientation sectionally.
  • the twin wire former is provided with a secondary headbox and the secondary headbox directed into the gusset of the converging secondary sieves is.
  • the sheet forming unit of the sheet forming device has another sheet forming unit is assigned, the further sheet-forming unit being a layer the multilayer paper or cardboard web on the first, from the twin wire former of the sheet-forming unit, and the bottom wire of the twin wire former both mentioned layers on the second, from the primary longitudinal sieve Sheets the generated sheet formation layer.
  • the additional sheet formation unit opens up the possibility of using a multilayer paper or cardboard web to produce more than two layers with different layer qualities.
  • the sheet forming unit of the sheet forming device another sheet forming unit is assigned, the further sheet formation unit being a layer of the multilayer Paper or cardboard web on at least that of the sheet forming unit generated layers, wherein the further sheet forming unit in a further advantageous manner is designed as a primary longitudinal screen.
  • the figures show a sheet forming device 1 with a primary longitudinal screen 10, which moves from right to left in accordance with the running direction A (arrow) in the respective figure.
  • a breast roll (deflection roll) 12 for the primary longitudinal screen 10 there is a headbox 14 for a lower (second) layer of the multilayer paper or cardboard web.
  • the primary longitudinal screen 10 can also be designed as a hybrid former H.
  • a twin-wire former D as a secondary sieve arrangement with a lower sieve 16 and an upper sieve 18.
  • the sieves 16 and 18 move according to the running direction B (arrow) in the respective figure from left to right, that is to say the lower sieve 16 by one Breast roller (deflection roller) 20 in the area of a headbox 22, a forming roller 24 (here, an forming roller) with a trough 32 for removing the water and further rollers 26.
  • the top wire 18 moves around a row of deflection rollers 28 and together with the bottom wire 16 the forming roller 24.
  • the lower wire 16 and the upper wire 18 in front of the forming roller 24 partially move together substantially in the horizontal direction and after the forming roller (in the direction of travel C (arrow)) behind the forming roller 24 at least partially together essentially in the vertical direction.
  • the lower wire 16 and the upper wire 18 run downward behind the forming roller 24 at least partially together at an angle, such as, for example, at an angle of approximately 45 degrees.
  • the running direction C in front of the forming roller 24, in the region of the twin wire former D below the lower wire 16, according to the invention there is a strip former L with pressure bars 32 acting on the lower wire 16.
  • a suction box above the upper wire 18 (D- Part ") 36.
  • At least one headbox 14, 22 with a nozzle space 14.1, 22.1 in which fins 14.2, 22.2 are arranged is provided and that at least one fiber suspension 14.3, 22.3 fed to at least one headbox 14, 22 has a consistency c im Range from 0.2% to 1.1% and a filler content f in the range from 0% to 80% with a preferred gap width s of the headbox 14, 22 in the range from 6 mm to 40 mm and a preferred flow rate Q of fiber suspension 14.3, 22.3 in the range from 4,000 l / (m • min) to 20,000 l / (m • min).
  • the slats 14.2, 22.2 according to the invention are only shown symbolically and they can end in front of the nozzle end, in particular in the range from 10 mm to 100 mm in front of the nozzle end, and / or they can end in the region of the nozzle end and / or they can protrude beyond the nozzle end ,
  • the strip former L arranged in the lower sieve 16 has between 1 and 4 pressure strips 32, which are preferably at least partially elastically supported, and the suction box ("D part") 36 arranged in the upper sieve 18 has a maximum box length L S of 1,200 mm
  • the forming roller 24 of the twin wire former D has a diameter D F in the range from 0.5 m to 1.7 m, preferably from 0.9 m to 1.4 m
  • the lower wire 16 of the twin wire former D has a pre-dewatering section V, whose length L V has a value in the range from 1 m to 12 m, preferably from 3 m to 10 m.
  • the dewatering in the twin wire former D is in the range from 15% to 60%.
  • at least one breast roller 12, 20 of the sheet-forming device 1 is provided with a shaking device 12.1, 20.1, which is not shown in detail but is known to the person skilled in the art and which the breast roller 12, 20 has a shaking index in the range from 200 mm / (min • m) to 15,000 mm / (min • m), preferably from 1,250 mm / (min • m) to 6,000 mm / (min • m), shakes.
  • a shaking index in the range from 200 mm / (min • m) to 1,250 mm / (min • m) can be achieved using conventional shaking, for example in the range from 1,250 mm / (min • m) to over 5,000 mm / (min • m) ) using a DuoShake and one in the range from 4,000 mm / (min • m) to 15,000 mm / (min • m) using an electromagnetic shaker.
  • At least one headbox 14, 22 is provided in a manner not shown with a sectioned stock density control (dilution water technology), as is known, for example, from the applicant's German patent application DE 40 19 593 A1 (PA04598 DE); the disclosure content of this document is hereby made the subject of the present description.
  • a sectioned stock density control diution water technology
  • the embodiment according to FIG. 2 differs from that according to FIG. 1 only by the other assignment of the twin wire former D to the primary longitudinal wire 10 in that the headboxes 14, 22 for the two layers on the same Side of the system are arranged.
  • the material feed for the two systems takes place in opposite directions Directions or on opposite sides.
  • the sheet forming device 1 shown in FIG. 3 complements the sheet forming device 1 of Figure 1 in the area of the primary longitudinal screen 10 with a equipped with another former 30, whereby a so-called hybrid former H is formed becomes.
  • the additional former 30 has both a screen 19 which is arranged around deflection rollers 27 is guided, as well as a suction box ("D-part") 36.
  • FIG. 4 shows a twin wire former D according to FIG. 2, but with a secondary headbox 23.
  • the secondary headbox 23 is in the Gusset of the converging secondary screens 16, 18 directed.
  • the sheet forming device 1 shown in FIG. 5 consists of three sheet forming units 40.1, 40.2, 40.3.
  • the middle sheet forming unit 40.1 essentially has the structure of the sheet forming device 1 according to FIG. 1; with regard to the description of the sheet formation unit 40.1, reference is therefore made to FIG. 1.
  • the only difference of the sheet forming device 1 with respect to the embodiment according to FIG. 1 is that the lower wire 16 and the upper wire 18 behind the forming roller 24 do not run at least partially together essentially in the vertical direction, but at an angle of approximately 60 degrees downwards.
  • the sheet forming unit 40.1 is assigned a further sheet forming unit 40.2, the further sheet forming unit 40.2 depositing one layer (insert) of the multilayer paper or cardboard web on the first layer (insert) generated by the twin wire former D of the sheet forming unit 40.1 and the bottom wire 16 of the twin wire former D both mentioned layers (deposits) on the layer (back) generated by the primary longitudinal screen 10 of the sheet forming unit 40.1.
  • the sheet-forming unit 40.1 is assigned a further sheet-forming unit 40.3, the further sheet-forming unit 40.3 depositing a layer (blanket) of the multilayer paper or cardboard web on at least the layers (inlays and backs) generated by the sheet-forming unit 40.1.
  • the further sheet forming unit 40.3 is designed as a primary longitudinal screen 10.1.
  • the device of the invention is created with which a very good formation when removing a large amount of water, resulting in good strength is achieved. Furthermore, the individual screen lengths and the overall length this paper or board machine section is reduced.

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  • Paper (AREA)
EP03101443A 2002-05-25 2003-05-21 Section de formage Ceased EP1365067A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10223398 2002-05-25
DE2002123398 DE10223398A1 (de) 2002-05-25 2002-05-25 Blattbildungsvorrichtung

Publications (1)

Publication Number Publication Date
EP1365067A1 true EP1365067A1 (fr) 2003-11-26

Family

ID=29285701

Family Applications (1)

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EP03101443A Ceased EP1365067A1 (fr) 2002-05-25 2003-05-21 Section de formage

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EP (1) EP1365067A1 (fr)
DE (1) DE10223398A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010089182A1 (fr) * 2009-02-06 2010-08-12 Voith Patent Gmbh Procédé de fabrication d'une bande de matière fibreuse à plusieurs épaisseurs et dispositif de formation de feuille permettant de mettre en oeuvre le procédé
WO2015185295A1 (fr) * 2014-06-06 2015-12-10 Voith Patent Gmbh Moyen de production d'une bande de matière fibreuse
WO2016083171A1 (fr) * 2014-11-28 2016-06-02 Voith Patent Gmbh Dispositif de fabrication d'une bande de matière fibreuse

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010039200A1 (de) 2010-08-11 2012-02-16 Voith Patent Gmbh Schüttelvorrichtung
DE102010039195A1 (de) 2010-08-11 2012-02-16 Voith Patent Gmbh Schüttelvorrichtung
DE102010039199A1 (de) 2010-08-11 2012-02-16 Voith Patent Gmbh Schüttelvorrichtung
DE102010039198A1 (de) 2010-08-11 2012-02-16 Voith Patent Gmbh Schüttelvorrichtung
DE102010039201A1 (de) 2010-08-11 2012-02-16 Voith Patent Gmbh Schüttelvorrichtung
DE102010039197A1 (de) 2010-08-11 2012-02-16 Voith Patent Gmbh Schüttelvorrichtung
DE102011003970A1 (de) 2011-02-11 2012-08-16 Voith Patent Gmbh Blattbildungsvorrichtung
DE102018121155A1 (de) * 2018-08-30 2020-03-05 Voith Patent Gmbh Verfahren und maschine zur herstellung einer mehrlagigen faserstoffbahn

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE593034C (de) * 1932-12-25 1934-02-20 J M Voith Fa Langsiebpartie an Papier- o. dgl. Maschinen
DE834950C (de) * 1951-06-04 1952-03-27 Scheufelen Papierfab Verfahren zum Schuetteln von Sieben, insbesondere umlaufenden Entwaesserungssieben in der Papierindustrie
US4617091A (en) * 1983-11-25 1986-10-14 Beloit Corporation Headbox trailing element
DE3720618A1 (de) * 1986-07-04 1988-01-07 Valmet Oy Verfahren im papierherstellungsprozess zur verbesserung der papiereigenschaften, speziell der retention
EP0711869A2 (fr) * 1994-11-10 1996-05-15 Voith Sulzer Papiermaschinen Gesellschaft mbH Caisse de tête à plusieurs couches
DE29615057U1 (de) * 1996-08-30 1997-01-09 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Stoffauflauf zur Einstellung der Formation einer Papierbahn
DE19951928A1 (de) * 1999-10-28 2001-05-03 Voith Paper Patent Gmbh Blattbildungsvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI75383C (fi) * 1986-02-11 1988-06-09 Ahlstroem Oy Foerfarande foer framstaellning av flerskiktskartong.
SE459263B (sv) * 1987-10-16 1989-06-19 Sca Development Ab Saett att framstaella treskiktspapper
DE4031038C2 (de) * 1990-10-01 1997-01-23 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Herstellen eines mehrlagigen Papiers oder Kartons

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE593034C (de) * 1932-12-25 1934-02-20 J M Voith Fa Langsiebpartie an Papier- o. dgl. Maschinen
DE834950C (de) * 1951-06-04 1952-03-27 Scheufelen Papierfab Verfahren zum Schuetteln von Sieben, insbesondere umlaufenden Entwaesserungssieben in der Papierindustrie
US4617091A (en) * 1983-11-25 1986-10-14 Beloit Corporation Headbox trailing element
DE3720618A1 (de) * 1986-07-04 1988-01-07 Valmet Oy Verfahren im papierherstellungsprozess zur verbesserung der papiereigenschaften, speziell der retention
EP0711869A2 (fr) * 1994-11-10 1996-05-15 Voith Sulzer Papiermaschinen Gesellschaft mbH Caisse de tête à plusieurs couches
DE29615057U1 (de) * 1996-08-30 1997-01-09 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Stoffauflauf zur Einstellung der Formation einer Papierbahn
DE19951928A1 (de) * 1999-10-28 2001-05-03 Voith Paper Patent Gmbh Blattbildungsvorrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010089182A1 (fr) * 2009-02-06 2010-08-12 Voith Patent Gmbh Procédé de fabrication d'une bande de matière fibreuse à plusieurs épaisseurs et dispositif de formation de feuille permettant de mettre en oeuvre le procédé
WO2015185295A1 (fr) * 2014-06-06 2015-12-10 Voith Patent Gmbh Moyen de production d'une bande de matière fibreuse
WO2016083171A1 (fr) * 2014-11-28 2016-06-02 Voith Patent Gmbh Dispositif de fabrication d'une bande de matière fibreuse

Also Published As

Publication number Publication date
DE10223398A1 (de) 2003-12-04

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