EP1236828B1 - Caisse d'arrivée pour machine à papier, carton ou tissu - Google Patents

Caisse d'arrivée pour machine à papier, carton ou tissu Download PDF

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Publication number
EP1236828B1
EP1236828B1 EP02000741A EP02000741A EP1236828B1 EP 1236828 B1 EP1236828 B1 EP 1236828B1 EP 02000741 A EP02000741 A EP 02000741A EP 02000741 A EP02000741 A EP 02000741A EP 1236828 B1 EP1236828 B1 EP 1236828B1
Authority
EP
European Patent Office
Prior art keywords
lamella
headbox
nozzle
downstream
length
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
EP02000741A
Other languages
German (de)
English (en)
Other versions
EP1236828A1 (fr
Inventor
Wolfgang Ruf
Konstantin Fenkl
Hans Loser
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 EP1236828A1 publication Critical patent/EP1236828A1/fr
Application granted granted Critical
Publication of EP1236828B1 publication Critical patent/EP1236828B1/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
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/028—Details of the nozzle section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines

Definitions

  • the invention relates to a headbox according to the preamble of present claim 1.
  • a slat of a headbox in the form of a multi-layer headbox is from German patent application DE 44 40 079 A1 the applicant known.
  • the two adjacent pulp suspension streams keeps separated until the area of an exit gap.
  • the Slat is designed symmetrically up to the area of the outlet gap and has at its lamella end a double-sided slope on the upper and Bottom of, for example, from 2 ° to 4 °.
  • German patent application DE 43 29 810 A1 the applicant known another such a slat of a headbox.
  • the lamella has grooves in its end region, which are preferably on the upper and Bottom of the slat in different design types and positions or alignments are provided.
  • a headbox of the type mentioned be improved so that its lamella improved geometry at their Lamellenende such that the known disadvantages of the prior Technique are avoided, in particular instabilities in the flow conditions and vibration tendencies.
  • the slope a Helix angle of 1.5 ° to 6 °, preferably from 2.5 ° to 5 °, since In this case, the percentage expansion of the flow area is not too great a value and thus counteracts the generation of separation vortices (turbulences) becomes.
  • the fin end preferably has a height of 0.4 mm to 0.6 mm, preferably of 0.5 mm, on. This height is sufficient to the fin end nor the stiffness necessary for optimal operation of the headbox to rent.
  • Lamella thickness 2 to 6 mm, preferably 4 mm, as these Values have been repeatedly proven in practice in various applications to have.
  • the Structure in the lamella the shape of grooves with rectangular and / or wedge-shaped and / or parabolic and / or round shape with constant and / or different Has depth.
  • the lamella can be formed from at least one high performance polymer be.
  • the high-performance polymer may in particular be a polyphenylsulfone (PPSU), a polyethersulfone (PES), a polyetherimide (PEI) or a polysulfone (PSU).
  • the blade according to the invention can continue in a headbox with sectioned Substance density control (dilution water technology) to be formed.
  • the possibility is created, the Throughput, the consistency and thus the basis weight and the fiber orientation be able to regulate sectionally, and in the presence of optimal slats.
  • the slat in a Headbox for a jet speed of more than 1,500 m / s, preferably of greater than 1,800 m / s, is designed to be installed.
  • the lamella can also be designed as a multilayer headbox Headbox be installed, the lamella, which are essentially the above Has properties, is designed as an intermediate plate.
  • This headbox 1 shows in schematic longitudinal section a headbox 1.
  • This headbox 1 comprises a feeding device 2 for a pulp suspension 3 in the headbox 1.
  • the feeding device 2 is formed as a transverse distribution tube 4; However, in a further embodiment, it may also comprise a central distributor with supply hoses.
  • the headbox 1 further consists of a machine-wide device for generating microturbulences ("turbulence generator") 5, which is preceded by a machine-wide prechamber 6 in the flow direction S (arrow) of the pulp suspension 3.
  • the turbulence generator 5 consists of a multiplicity of turbulence tubes 5.2 of most different shape arranged in rows and in columns next to one another and one above the other.
  • the turbulence generator 5 is followed by a machine-wide headbox nozzle 7 for distributing the pulp suspension 3 between two sieves (lower sieve 8.1, upper sieve 8.2) of a twin-wire former (gap former) 9; however, in a further embodiment, the pulp suspension 3 can also be distributed only to a sieve of a wire mesh or hybrid former.
  • the headbox nozzle 7 with a nozzle length L D is limited in Figure 1 at the beginning of the turbulence generator 5 and the end of an exit slit 7.1 and laterally by an upper nozzle wall 13.1, a lower nozzle wall 13.2 and two side parts, not shown.
  • the two machine-wide blades 10.1, 10.2 are mounted, the lower blade 10.1 articulated and the upper blade is rigidly attached to the turbulence generator 5.
  • the two slats 10.1, 10.2 with a respective slat length L L at their downstream slat ends 11.1, 11.2 on the sides which face the upper nozzle wall 13.2, each with a slope 12.11, 12.12 and on the opposite sides with structures 12.21, 12.22 is provided.
  • the respective lamella length L L takes a value of at least 80% of the nozzle length L D and the flow velocities v S (arrow) of the fibrous suspensions 3, 3.1, 3.2 at the two ends of the lamellae 11.1, 11.2 are in the range of greater than 5 m / s ,
  • the upper nozzle wall 13.2 is provided in the region of the outlet gap 7.1 with a preferably adjustable aperture 7.2, wherein the bevels 12.11, 12.12 of the lamella 10.1, 10.2 are directed towards the aperture 7.2 out.
  • the lamellae 10.1, 10.2 are formed from at least one high-performance polymer, wherein the high-performance polymer is in particular a polyphenylsulfone (PPSU), a polyethersulfone (PES), a polyetherimide (PEI) or a polysulfone (PSU).
  • the fins 10.1, 10.2 of the headbox 1 are under hydraulic and fluidic aspects for a jet velocity v St (arrow) of greater than 1,500 m / s, preferably greater than 1,800 m / s , designed.
  • the headbox shown in Figure 2 in a schematic view of space is formed as a multi-layer headbox 1.1, which has only schematically illustrated feeders 2, 2.1, 2.2 for supplying different pulp suspensions 3, 3.1, 3.2.
  • the headbox 7 is limited in a known manner by two machine-wide nozzle walls 13.1, 13.2. These are connected via a respective known turbulence generator 5, 5.1 with a central stationary partition wall 14.
  • a separating blade 16 is pivotally mounted by means of a hinge 15. Notwithstanding this, the separating blade 16 may also be rigidly secured to the partition wall 14.
  • the plurality of intermediate lamellae 16.1 are designed as lamellae 10.1, 10.2 according to the invention.
  • the multilayer headbox 1.1 according to the invention as headbox with sectioned substance density control (dilution water technology), as claimed in the German patent application DE 40 19 593 A1 of the Applicant, trained.
  • a first high-consistency pulp suspension stream Q H.1 passes through a transverse dividing pipe 4 and via a series of sectional feed pipes 17... 17n branched off to the turbulence generator 5. Deviating from FIG. 2, in each sectional feed pipe 17. n be provided a volumetric flow controller.
  • a second pulp suspension stream having a low consistency Q L for example white water, preferably white water I, via a transverse distribution pipe 4.1 and sectional feed lines 18 ... 18.n into the sectional feed lines 17 ... 17 .n led.
  • Each of the sectional feed lines 18 ... 18.n has a control valve 19 ...
  • a third pulp suspension stream of medium or high consistency Q H.2 passes via a transverse distribution pipe 4.2 and via a series of sectioned feed lines 21... 21n branched off to the turbulence generator 5.1.
  • the headbox 1 shown in Figure 1 may be formed as a headbox with sectioned consistency control (dilution water technology), according to the aforementioned embodiments.
  • FIG. 3a shows a schematic longitudinal section of a downstream lamella end 11.1 of a lamella 10.1 according to the invention.
  • the slope 12.11 have a helix angle ⁇ S of 1.5 ° to 6 °, preferably from 2.5 ° to 5 °, whereas the fin end 11.1 has a height H of 0.4 mm to 0.6 mm, preferably of 0.5 mm.
  • the lamella 10.1 has a predominant lamella thickness D of 2 to 6 mm, preferably 4 mm.
  • the structured fin end 11.1 has in a further design the structure of Grooves 22 with rectangular and / or wedge-shaped and / or parabolic and / or round shape with constant and / or different depths T.
  • FIG. 3b shows three schematic and exemplary plan views according to the view arrow E of FIG. 3a on structured fin ends 11.1 of lamellae 10.1 according to the invention.
  • the structured lamella ends 11.1 of the lamellae 10.1 according to the invention have a multiplicity of grooves 22 with a rectangular (A) and / or wedge-shaped (B) and / or parabolic (C) and / or round shape with a constant and / or different depth can have.
  • Further combinations with regard to the configuration of the structured end regions are known from the German patent application DE 43 29 810 A1 of the Applicant.
  • a headbox of the invention initially created type is created, the lamella of an improved geometry has at its lamella end such that the known disadvantages of the prior art are avoided, in particular instabilities in the Flow conditions and vibration tendencies.

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  • Paper (AREA)

Claims (10)

  1. Caisse de tête (1, 1.1) d'une machine à papier, carton ou tissu, comprenant au moins une lamelle (10.1, 10.2), qui est parcourue par au moins une suspension fibreuse (3, 3.1, 3.2) et présente une buse de caisse de tête (7) de la largeur de la machine présentant une fente de sortie (7.1) avec une longueur de buse (LD), qui comprend une paroi de buse supérieure (13.1) et une paroi de buse inférieure (13.2) et dans laquelle la lamelle (10.1, 10.2) est placée, la lamelle (10.1, 10.2) étant pourvue d'une longueur de lamelle (LL) à son extrémité de lamelle aval (11.1, 11.2) d'un côté qui est tourné vers l'une des deux parois de buse (13.1, 13.2), d'un biseau (12.11, 12.12) et du côté opposé d'une structure (12.21, 12.22) et la structure (12.21, 12.22) présentant la forme de rainures (22) de forme rectangulaire et/ou angulaire et/ou parabolique et/ou ronde de profondeur constante et/ou différente (T),
    caractérisée en ce que
    la paroi de buse supérieure (13.1) dans la région de la fente de sortie (7.1) est pourvue d'un diaphragme (7.2) de préférence réglable et en ce que le biseau (12.11, 12.12) est orienté vers le diaphragme (7.2).
  2. Caisse de tête (1, 1.1) comprenant au moins une lamelle (10.1, 10.2) selon la revendication 1,
    caractérisée en ce que
    le biseau (12.11, 12.12) présente un angle de biseautage (αS) de 1,5° à 6°, de préférence de 2,5° à 5°.
  3. Caisse de tête (1, 1.1) comprenant au moins une lamelle (10.1, 10.2) selon la revendication 1 ou 2,
    caractérisée en ce que
    l'extrémité de lamelle aval (11.1, 11.2) présente une hauteur (H) de 0,4 mm à 0,6 mm, de préférence de 0,5 mm.
  4. Caisse de tête (1, 1.1) comprenant au moins une lamelle (10.1, 10.2) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la lamelle (10.1, 10.2) présente une épaisseur de lamelle principale (D) de 2 à 6 mm, de préférence de 4 mm.
  5. Caisse de tête (1, 1.1) comprenant au moins une lamelle (10.1, 10.2) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la lamelle (10.1, 10.2) est formée d'au moins un polymère à haute performance et
    en ce que le polymère à haute performance est une polyphénylsulfone (PPSU), une polyéthersulfone (PES), un polyétherimide (PEI) ou une polysulfone (PSU).
  6. Caisse de tête (1, 1.1) comprenant au moins une lamelle (10.1, 10.2) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la longueur de la lamelle (LL) représente au moins 80% de la longueur de la buse (LD).
  7. Caisse de tête (1, 1.1) comprenant au moins une lamelle (10.1, 10.2) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la vitesse d'écoulement (VS) de la suspension fibreuse (3, 3.1, 3.2) dans la région de l'extrémité de lamelle aval (11.1, 11.2) est dans la plage de plus de 5 m/s.
  8. Caisse de tête (1, 1.1) comprenant au moins une lamelle (10.1, 10.2) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la caisse de tête (1, 1.1) est réalisée avec un réglage de densité de matière (technologie d'eau de dilution) par sections.
  9. Caisse de tête (1, 1.1) comprenant au moins une lamelle (10.1, 10.2) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la caisse de tête (1) est conçue pour une vitesse de jet (VSt) supérieure à 1500 m/s, de préférence supérieure à 1800 m/s.
  10. Caisse de tête (1, 1.1) comprenant au moins une lamelle (10.1, 10.2) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la caisse de tête est réalisée en tant que caisse de tête à plusieurs couches (1.1) et en ce que la lamelle (10.1, 10.2) est incorporée en tant que lamelle intermédiaire (16.1).
EP02000741A 2001-02-14 2002-01-12 Caisse d'arrivée pour machine à papier, carton ou tissu Expired - Lifetime EP1236828B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10106684 2001-02-14
DE10106684A DE10106684A1 (de) 2001-02-14 2001-02-14 Lamelle eines Stoffauflaufs einer Papier-, Karton- oder Tissuemaschine

Publications (2)

Publication Number Publication Date
EP1236828A1 EP1236828A1 (fr) 2002-09-04
EP1236828B1 true EP1236828B1 (fr) 2005-04-27

Family

ID=7673911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02000741A Expired - Lifetime EP1236828B1 (fr) 2001-02-14 2002-01-12 Caisse d'arrivée pour machine à papier, carton ou tissu

Country Status (4)

Country Link
US (1) US20020153113A1 (fr)
EP (1) EP1236828B1 (fr)
AT (1) ATE294277T1 (fr)
DE (2) DE10106684A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10122047A1 (de) * 2001-05-07 2002-11-14 Voith Paper Patent Gmbh Blattbildungsvorrichtung und -verfahren
FI123339B (fi) * 2004-12-08 2013-02-28 Vaahto Oy Sovitelma perälaatikossa
DE102005038424A1 (de) * 2005-08-12 2007-02-15 Voith Patent Gmbh Verfahren zur Herstellung einer Faserstoffbahn und Doppelsiebformer zur Durchführung des Verfahrens
FI119441B (fi) * 2007-08-20 2008-11-14 Runtech Systems Oy Menetelmä paperirainan muodonmuutoksien kompensoimiseksi
DE102008040688A1 (de) 2008-07-24 2010-01-28 Voith Patent Gmbh Verfahren zur Optimierung der Energiebilanz in Formiereinheiten in Maschinen zur Herstellung von Faserstoffbahnen und Formiereinheit
DE102008043145A1 (de) * 2008-10-24 2010-04-29 Voith Patent Gmbh Zweischichtenstoffauflauf für eine Maschine zur Herstellung einer zweischichtigen Faserstoffbahn
DE102009028385A1 (de) 2009-08-10 2011-02-17 Voith Patent Gmbh Verfahren zum Betreiben einer Blattbildungseinheit und Blattbildungseinheit
DE102009028389A1 (de) 2009-08-10 2011-02-17 Voith Patent Gmbh Stoffauflauf, Blattbildungseinheit mit einem Stoffauflauf und Verfahren zum Betreiben einer Blattbildungseinheit
DE102010001610A1 (de) 2010-02-05 2011-08-11 Voith Patent GmbH, 89522 Stoffauflauf und Blattbildungseinheit mit einem Stoffauflauf
DE102010001614A1 (de) 2010-02-05 2011-08-11 Voith Patent GmbH, 89522 Stoffauflauf und Blattbildungseinheit mit einem Stoffauflauf
DE102010001613A1 (de) 2010-02-05 2011-08-11 Voith Patent GmbH, 89522 Stoffauflauf und Blattbildungseinheit mit einem Stoffauflauf
DE102010001615A1 (de) 2010-02-05 2011-08-11 Voith Patent GmbH, 89522 Stoffauflauf und Blattbildungseinheit mit einem Stoffauflauf
DE102010029580A1 (de) 2010-06-01 2011-12-01 Voith Patent Gmbh Maschine zur Herstellung einer Papierbahn insbesondere Sackpapierbahn
US8877011B2 (en) 2011-05-11 2014-11-04 Hollingsworth & Vose Company Systems and methods for making fiber webs
WO2013016515A1 (fr) 2011-07-27 2013-01-31 Hollingsworth & Vose Company Systèmes et procédés pour réaliser des bandes fibreuses
WO2013016509A1 (fr) 2011-07-27 2013-01-31 Hollingsworth & Vose Company Systèmes et procédés pour réaliser des bandes fibreuses
WO2019136254A1 (fr) * 2018-01-05 2019-07-11 International Paper Company Produits papetiers ayant une résistance à la flexion et une résistance dans le sens travers accrues et leurs procédés de fabrication

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Publication number Priority date Publication date Assignee Title
US3843470A (en) * 1970-08-31 1974-10-22 Beloit Corp Flexible trailing elements in a paper-making machine headbox having projections thereon extending into the slurry flow
US4617091A (en) * 1983-11-25 1986-10-14 Beloit Corporation Headbox trailing element
US4941950A (en) * 1989-07-26 1990-07-17 Beloit Corporation Headbox with grooved trailing element
US5707495A (en) * 1990-06-20 1998-01-13 J.M. Voith Gmbh Headbox for papermaking machine with more uniform flow
DE4329810C2 (de) * 1993-09-03 1997-02-06 Voith Gmbh J M Geometrie des Lamellenendes eines Stoffauflaufes
DE4440079C2 (de) * 1994-11-10 1997-10-02 Voith Sulzer Papiermasch Gmbh Mehrschichten-Stoffauflauf
SE506931C2 (sv) * 1996-06-12 1998-03-02 Valmet Karlstad Ab Flerskiktsinloppslåda för en pappersmaskin
AT406172B (de) * 1998-02-05 2000-03-27 Andritz Patentverwaltung Vorrichtung zur zufuhr einer faserstoffsuspension auf eine entwässerungseinrichtung
DE19902623A1 (de) * 1999-01-23 2000-07-27 Voith Sulzer Papiertech Patent Stoffauflauf
DE20015471U1 (de) * 2000-09-07 2000-11-16 Valmet Corp Im Lippenkanal eines Stoffauflaufs einer Papiermaschine anzubringende Turbulenzbarte
DE10051802A1 (de) * 2000-10-18 2002-04-25 Voith Paper Patent Gmbh Lamelle eines Stoffauflaufs einer Papier-, Karton- oder Tissuemaschine

Also Published As

Publication number Publication date
US20020153113A1 (en) 2002-10-24
DE50202879D1 (de) 2005-06-02
DE10106684A1 (de) 2002-08-29
ATE294277T1 (de) 2005-05-15
EP1236828A1 (fr) 2002-09-04

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