EP1659214B1 - Caisse de tête d'une machine pour fabriquer une bande fibreuse - Google Patents

Caisse de tête d'une machine pour fabriquer une bande fibreuse Download PDF

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Publication number
EP1659214B1
EP1659214B1 EP05110803A EP05110803A EP1659214B1 EP 1659214 B1 EP1659214 B1 EP 1659214B1 EP 05110803 A EP05110803 A EP 05110803A EP 05110803 A EP05110803 A EP 05110803A EP 1659214 B1 EP1659214 B1 EP 1659214B1
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EP
European Patent Office
Prior art keywords
headbox
flow
structuring
dilution device
flow 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.)
Not-in-force
Application number
EP05110803A
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German (de)
English (en)
Other versions
EP1659214A1 (fr
Inventor
Konstantin Fenkl
Klaus Lehleiter
Wolfgang Ruf
Hans Loser
Uli Dürr
Karl Bunz
Simon Juhas
Ole Hansen
Jens Haessner
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 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.)
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Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1659214A1 publication Critical patent/EP1659214A1/fr
Application granted granted Critical
Publication of EP1659214B1 publication Critical patent/EP1659214B1/fr
Not-in-force 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
    • D21F1/024—Details of the feed chamber
    • 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
    • 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

Definitions

  • the invention relates to a headbox of a machine for producing a fibrous web, in particular paper or board web, from at least one fibrous suspension, with a sectioned transversely to the machine direction dilution device, in particular Siebwasserdos réelles featured, the partial mixing flows and the in the flow direction of the at least one pulp suspension is a transverse to the machine direction extending intermediate channel, a plurality of turbulence channels having turbulence generator and then a headbox, wherein the headbox has a flow space and is provided with a pulp suspension jet supplying exit gap, and wherein the intermediate channel and / or the flow space of the headbox through at least one with the dilution device or connected to the turbulence generator by means of at least one blade holder and two of at least ns of a pulp suspension touched flow surfaces having fin is divided.
  • Such a headbox is from the US-A-5,814,191 known.
  • At least one of the two flow surfaces of the at least one fin is provided with an at least partially structured surface, wherein the structuring is selected such that a mixture of emerging from the dilution device and entering the intermediate channel or emerging from the turbulence generator and in the headbox entering partial mixing streams at least difficult, preferably almost completely prevented.
  • the at least one flow area of the lamella is advantageously provided at least in the first tenth, preferably in the first fifth, in particular over its entire lamella length, with a corresponding structuring together with a structure length.
  • the structuring at an angle of -5 to + 5 °, preferably from -1 to + 1 °, in particular of 0 °, attached to the machine direction.
  • the flow quality and the orientation of the mixed flow streams are not negatively affected.
  • the structuring has a preferred pitch in the range of 5 to 100 mm, preferably 25 to 75 mm, wherein the respective pitch in the machine direction and / or transverse to the machine direction may be constant and / or different.
  • These divisions essentially comprise the present-day divisions of a dilution device with its generated mixed partial flows.
  • the division of the structuring is preferably the same or a fraction of the division of the dilution device.
  • the structuring of the lamella and the sections of the dilution device are preferably arranged in the machine direction in the middle or approximately centrally offset from one another, so that a generated mixed partial flow passes through the lamella between two at least structurings.
  • At least one structure is preferably provided, which is formed by an elevation or by a depression.
  • the structure assumes a structural height which is advantageously in the range of 5 to 250%, preferably 10 to 100%, in particular 25 to 50%, of the lamellar thickness.
  • the structure height along the structure length can assume a constant, a decreasing or an increasing value.
  • the structure assumes a structure depth which is advantageously in the range of 10 to 75%, preferably 25 to 50%, of the lamellar thickness.
  • the structure depth along the structure length can again assume a constant value, a decreasing value or an increasing value.
  • the height of the structure can be further specified in relation to the flow channel formed between two fins with the appropriate channel height.
  • the height of the structure may preferably assume a value in the range of 5 to 90%, preferably 25 to 75%, of the height of the flow channel.
  • the structure has a polygonal cross-section perpendicular to the structure length or flow direction of the pulp suspension.
  • This can in particular be dome-shaped, semicircular, triangular, square, rectangular or pentagonal, this exemplary list is certainly not exhaustive.
  • the entire structure can also be formed from a large number of elevations and depressions.
  • various structural patterns for example zones with elevations, zones with depressions and mixing zones with elevations and depressions are possible.
  • the zones may be arbitrarily arranged to form the texture pattern.
  • the size of the individual zones may be the same and / or different.
  • the wall bounding the intermediate channel or the flow space of the headbox nozzle may also have a structured surface at least in some areas.
  • structuring reference is made to the lamella structuring.
  • the inventive machine for producing a fibrous web in particular paper and / or board web, is characterized in that it is provided with a head box according to the invention.
  • FIG. 1 shows a schematic, partially sectioned illustration of a headbox 1 for a machine for producing a fibrous web from a pulp suspension 2 (Q H , C H ).
  • the machine may be a paper or board machine and the fibrous web may be a paper or board web.
  • the headbox 1 in deviation from the illustrated straight design to have an at least simple kinked construction. Such at least simply kinked headboxes were and are by Applicant manufactured.
  • the buckling may for example be between the intermediate chamber and the turbulence generator.
  • the headbox 1 comprises a transverse to the machine direction L (arrow) sectioned dilution device 3, in particular Siebwasserdostechniks adopted (Q L , C L ), in the flow direction S (arrow) of the at least one pulp suspension 2 in a direction transverse to the machine direction L (arrow) extending intermediate channel 4, a plurality of turbulence channels 6 aufwei transmitter turbulence generator 5 and then a headbox nozzle 7 is connected downstream.
  • the headbox nozzle 7 has a flow space 8 and is provided with a pulp suspension jet 12 supplying exit slit 11.
  • On dilution device 3 may for example be a known Siebwasserdosticianssystem, as provided for in connection with the available on the market ModuleJet ® -Stoffanklauf.
  • the ModuleJet ® headbox is for example in the German patent DE 40 19 593 C2 described. It is only important that the dilution device 3 delivers partial mixed flows M T with different consistency and a certain mixing width into the intermediate channel 4.
  • the turbulence generator 5 can be provided in particular as a turbulence insert.
  • the turbulence channels 6 can be formed in particular by turbulence pipes.
  • the lamella 10 now has, as detailed in FIGS. 2 a to 5 a and 2 b to 5 b, at least one area-wise structured surface 13 ', 13 on at least one of its two flow surfaces F o , F u , F o ', F u ' on.
  • the structuring of the surface 13, 13 ' is chosen such that a mixture of emerging from the turbulence generator 5 and in the Headbox 7 entering partial mixing streams M T at least difficult, preferably almost completely prevented.
  • the intermediate channel 4 and the flow space 8 of the headbox nozzle 7 is now by at least one of the dilution device 3 and the turbulence generator 5 by means of at least one blade holder 9 ', 9 connected and two of at least one pulp suspension 2 touched flow surfaces F O , F U , F O ', F U ' having lamella 10, 10 'divided.
  • At least one of the two flow surfaces F O , F U , F O ', F U ' of the at least one lamella 10, 10 ' provided with an at least partially structured surface 13, 13', wherein the structuring is selected such that a mixing the emerging from the dilution device 3 and entering the intermediate channel 4 or emerging from the turbulence generator 5 and entering the headbox 7 partial mixing streams M T at least difficult, preferably almost completely prevented.
  • the lamellae 10, 10 'can have different contours and lengths.
  • the intermediate chamber 4 or the flow space 8 of the headbox nozzle 7 can be provided with at least one lamella 10, 10 '. If both spaces 4, 8 are provided with lamellae 10, 10 ', they may, as already stated, be different in terms of number, contour, length and the like.
  • the dilution device 3 may, of course, have a plurality of channels in a further embodiment, between which the lamella holders are then arranged.
  • the lamella holder 9, 9 'for holding the respective lamella 10, 10' for example, according to the disclosure of German Offenlegungsschrift DE 199 62 709 A1 be executed.
  • the lamella holder 9, 9 ' can be hinged be formed to thereby allow an articulated mounting of the lamella 10, 10 ', or it may be rigid, thereby allowing a firm clamping of a preferably kinked lamella.
  • the lamellae holder 9, 9 'sectioned transversely to the machine direction, preferably formed uniformly sectioned and the lamella 10, 10' may have in the region of the lamella holder 9, 9 'an inflow surface with streamlined contour with and without special surface structure.
  • FIGS. 2 a to 5 a now each show a lamella 10, 10 'according to the invention with at least one surface 13, 13' structurally structured on the underside in respective views opposite to the flow direction S (arrow) of the pulp suspension 2.
  • the structuring is applied to the surface 13, 13 'of the lower flow surface F, F u '.
  • at least one structure 14 is provided, which is formed by a survey 15.
  • the structuring has four different structures 14.1 to 14.4, these having different polygonal cross-sections.
  • the structure 14.1 has, for example, a rectangular cross section
  • the structure 14.2 has a rounded rectangular
  • the structure 14.3 has a dome-shaped
  • the structure 14.4 has a triangular shape.
  • These structures 14 are merely exemplary in nature. In the realization case, only a structure 14 for structuring the surface 13, 13 'of the lamella 10, 10' will probably be used.
  • the structure 14 assumes a structure height H, which is preferably in the range from 5 to 250%, preferably from 10 to 100%, in particular from 25 to 50%, of the lamella thickness D. Furthermore, the structure height H takes in the flow direction S (arrow) of the pulp suspension 2 a constant value, as in Figure 2b, the inventive lamella 10, 10 'of Figure 2a in a Side view represents, it can be seen. However, the structure height H can also assume a decreasing or increasing value in the flow direction S (arrow) of the pulp suspension 2.
  • the structuring is in turn attached to the surface 13, 13 'of the lower flow surface F U , F U '.
  • at least one structure 14 is provided, which however is formed by a recess 16.
  • the structuring has four different structures 14.5 to 14.8, these having different polygonal cross sections.
  • the structure 14.5 has, for example, a rectangular cross section, the structure 14.6 a rounded rectangular, the structure 14.7 a dome-shaped and finally the structure 14.8 a triangular.
  • These structures 14 are merely exemplary in nature. In the realization case, only a structure 14 for the structuring of the surface 13, 13 'of the lamella 10, 10' will probably be used.
  • the lamella 10, 10 ' may have an at least substantially rectilinear course and may have different geometries and / or structures, in particular in the fin end regions.
  • a sipe 10, 10 ' preferably made of a carbon fiber, fiberglass, polycarbonate such as Makrolon ® or Lexan ®, high-performance polymer such as polyphenyl sulfone, polyether sulfone, polyether imide or polysulphone and / or the like.
  • the structuring is applied both to the surface 13, 13 'of the lower flow surface F U , F U ' and at least partially to the surface 13, 13 'of the upper flow surface F O , F O '.
  • the structures 14 provided for structuring are all in the form of recesses 16.
  • the opposing structures 14.9a, 14.9b and 14.10a, 14.10b have a flat rectangular and rounded cross-section and the only underside mounted structures 14.11, 14.12, 14.13 a deep rectangular and rounded cross-section.
  • the structuring is again applied to both the surface 13, 13 'of the lower flow surface F U , F U ' and the surface 13, 13 'of the upper flow surface F O , F O '.
  • the structures 14 provided for the structuring are formed both as elevations 15 and depressions 16, the elevations 15 and the depressions 16 alternating in their arrangement transversely to the flow direction S (arrow).
  • Each of the depressions 16 forming structures 14.14 have a flat rectangular and rounded cross-section and each one elevation 15 forming structures 14.15 a triangular cross-section.
  • the structure 14 is thus formed from a total of a plurality of elevations 15 and depressions 16.
  • the patterning structures 14 may be different in size, location, pitch, and the like.
  • FIG. 6 shows, for example, two adjacent lamellae 10, 10 'according to the invention in a view opposite to the flow direction S (arrow) of the pulp suspension 2. It can be clearly seen that the structures 14 of the two surfaces 13, 13 'of the lower flow surfaces F U , F U ' and the upper flow surfaces F O , F O 'are different in size, formation and pitch and offset from each other.
  • FIGS. 2 b, 3 b, 4 b and 5 b illustrate the lamellae 10, 10 'according to the invention of FIGS. 2 a, 3 a, 4 a and 5 a in a respective side view.
  • the at least one flow surface F O , F O ', F U , F U ' of the lamella 10, 10 'of FIGS. 2a to 5b is at least in the first tenth, preferably in the first fifth, in particular over their entire length Lamellae length I L , with a corresponding structuring along with structure length I S provided.
  • the lamella 10, 10 ' generally has a lamella length I L in the range of 100 to 800 mm and ends preferably within the headbox nozzle 7.
  • the structuring itself is at an angle ⁇ of -5 to + 5 °, preferably from -1 to + 1 °, in particular of 0 °, attached to the machine direction L.
  • the structuring has a pitch T S in the range of 5 to 100 mm, preferably 25 to 75 mm, the respective pitch T SN in the machine direction L (arrow) and / or transversely to the machine direction L (FIG. Arrow) is constant and / or different.
  • the dilution device 3 has a pitch T V (FIG. 1), wherein the pitch T S of the structuring is the same or a fraction, in particular 1 ⁇ 2, 1 ⁇ 3 or 1 ⁇ 4, of the pitch T V of the dilution device 3.
  • the structuring of the blade 10 ', 10 and the sections of the dilution device 3 in the machine direction L (arrow) are arranged centrally or approximately centrally offset from one another.
  • the intermediate channel 4 and the flow chamber 8 of the headbox 7 limiting wall at least partially a structured surface 13 ', 13 has.
  • the invention provides one of the aforementioned type which, when using a dilution water technique, makes it possible to achieve the narrowest possible response width of the dilution device.

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  • Paper (AREA)
  • Nonwoven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (17)

  1. Caisse de tête (1) d'une machine de fabrication d'une nappe fibreuse, notamment d'une nappe de papier ou de carton, constituée d'au moins une suspension fibreuse (2) avec un dispositif de dilution (3) divisé en sections transversalement à la direction d'avance de la machine (L), notamment un dispositif de dosage d'eau blanche, qui fournit des courants de mélange partiels (MT) et qui est suivi, dans la direction de l'écoulement (S) de l'au moins une suspension fibreuse (2), par un canal intermédiaire (4) s'étendant transversalement à la direction d'avance de la machine (L), un générateur de turbulences (5) présentant une pluralité de canaux de turbulence (6) et ensuite une buse de caisse de tête (7), la buse de caisse de tête (7) présentant une chambre d'écoulement (8) et étant pourvue d'une fente de sortie (11) fournissant un jet de suspension fibreuse (12),
    et le canal intermédiaire (4) et/ou la chambre d'écoulement (8) de la buse de caisse de tête (7) étant divisé(e) par au moins une lamelle (10' ; 10) connectée au dispositif de dilution (3) ou au générateur de turbulences (5) au moyen d'au moins une fixation à lamelles (9' ; 9) et présentant deux surfaces d'écoulement (FO', FU' ; FO, FU) en contact avec l'au moins une suspension fibreuse (2),
    caractérisée en ce que
    au moins l'une des deux surfaces d'écoulement (FO', FU' ; FO, FU) de l' au moins une lamelle (10' ; 10) est pourvue d'une surface (13' ; 13) au moins partiellement structurée,
    la structuration étant choisie de telle sorte qu'un mélange des courants de mélange partiels (MT) sortant du dispositif de dilution (3) et entrant dans le canal intermédiaire (4) ou sortant du générateur de turbulences (5) et entrant dans la buse de caisse de tête (7) soit au moins rendu plus difficile, et de préférence soit pratiquement complètement supprimé.
  2. Caisse de tête (1) selon la revendication 1,
    caractérisée en ce que
    les deux surfaces d'écoulement (FO', FU' ; FO, FU) de la lamelle (10' ; 10) sont pourvues d'une surface (13' ; 13) au moins partiellement structurée.
  3. Caisse de tête (1) selon la revendication 1 ou 2,
    caractérisée en ce que
    l'au moins une surface d'écoulement (FO', FU' ; FO, FU) de la lamelle (10' ; 10) est munie d'une structuration correspondante incluant toute la longueur de la structure (lS) au moins dans le premier dixième, de préférence dans le premier cinquième, notamment sur toute la longueur de la lamelle (lL).
  4. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la structuration est appliquée suivant un angle (α) de -5 à +5°, de préférence de -1 à +1°, notamment de 0° par rapport à la direction d'avance de la machine (L).
  5. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la structuration présente une division (TS) de l'ordre de 5 à 100 mm, de préférence de 25 à 75 mm, la division respective (TSN) dans la direction d'avance de la machine (L) et/ou transversalement à la direction d'avance de la machine (L) étant constante et/ou différente.
  6. Caisse de tête (1) selon la revendication 5,
    caractérisée en ce que
    le dispositif de dilution (3) présente une division (TV), la division (TS) de la structuration étant égale à ou étant une fraction de la division (TV) du dispositif de dilution (3).
  7. Caisse de tête (1) selon la revendication 6,
    caractérisée en ce que
    la structuration de la lamelle (10' ; 10) et les sections du dispositif de dilution (3) dans la direction d'avance de la machine (L) sont disposées de manière décalée les unes par rapport aux autres au centre ou approximativement au centre.
  8. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'on prévoit au moins une structure (14 ; 14.1, 14.2, 14.3, 14.4 ; 14.15) qui est formée par un rehaussement (15).
  9. Caisse de tête (1) selon la revendication 8,
    caractérisée en ce que
    la structure (14 ; 14.1, 14.2, 14.3, 14.4 ; 14.15) présente une hauteur de structure (H) qui est de l'ordre de 5 à 250%, de préférence de 10 à 100%, notamment de 25 à 50% de l'épaisseur de la lamelle (D).
  10. Caisse de tête (1) selon la revendication 9,
    caractérisée en ce que
    la hauteur de structure (H) le long de la longueur de la structure (ls) présente une valeur constante, décroissante ou croissante.
  11. Caisse de tête (1) selon l'une quelconque des revendications 1 à 7,
    caractérisée en ce que
    l'on prévoit au moins une structure (14 ; 14.5, 14.6, 14.6, 14.8 ; 14.9a, 14.9b, 14.10a, 14.10b, 14.11, 14.12, 14.13 ; 14.14) qui est formée par un renfoncement (16).
  12. Caisse de tête (1) selon la revendication 11,
    caractérisée en ce que
    la structure (14 ; 14.5, 14.6, 14.6, 14.8 ; 14.9a, 14.9b, 14.10a, 14.10b, 14.11, 14.12, 14.13 ; 14.14) présente une profondeur de structure (T) qui est de l'ordre de 10 à 75%, de préférence de 25 à 50%, de l'épaisseur de la lamelle (D).
  13. Caisse de tête (1) selon la revendication 12,
    caractérisée en ce que
    la profondeur de structure (T) le long de la longueur de la structure (lS) présente une valeur constante, décroissante ou croissante.
  14. Caisse de tête (1) selon l'une quelconque des revendications 8 à 13,
    caractérisée en ce que
    la structure (14 ; 14.1, 14.2, 14.3, 14.4 ; 14.5, 14.6, 14.6, 14.8 ; 14.9a, 14.9b, 14.10a, 14.10b, 14.11, 14.12, 14.13 ; 14.14, 14.15) présente une section transversale polygonale, notamment en forme de calotte, une section transversale semi-circulaire, triangulaire, carrée, rectangulaire ou pentagonale.
  15. Caisse de tête (1) selon l'une quelconque des revendications 8 à 14,
    caractérisée en ce que la structure (14 ; 14.1, 14.2, 14.3, 14.4 ; 14.5, 14.6, 14.6, 14.8 ; 14.9a, 14.9b, 14.10a, 14.10b, 14.11, 14.12, 14.13 ; 14.14, 14.15) est formée dans l'ensemble d'une pluralité de rehaussements (15) et de renfoncements (16).
  16. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la paroi limitant le canal intermédiaire (4) ou la chambre d'écoulement (8) de la buse de caisse de tête (7) présente aussi une surface (13' ; 13) au moins partiellement structurée.
  17. Machine de fabrication d'une nappe fibreuse, notamment une nappe de papier ou de carton, comprenant une caisse de tête (1) selon l'une quelconque des revendications 1 à 16.
EP05110803A 2004-11-19 2005-11-16 Caisse de tête d'une machine pour fabriquer une bande fibreuse Not-in-force EP1659214B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004000051A DE102004000051A1 (de) 2004-11-19 2004-11-19 Stoffauflauf einer Maschine zur Herstellung einer Fasersstoffbahn

Publications (2)

Publication Number Publication Date
EP1659214A1 EP1659214A1 (fr) 2006-05-24
EP1659214B1 true EP1659214B1 (fr) 2007-08-15

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EP (1) EP1659214B1 (fr)
AT (1) ATE370271T1 (fr)
DE (2) DE102004000051A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005027354A1 (de) * 2005-06-13 2006-12-14 Voith Patent Gmbh Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn
CN101589296B (zh) * 2006-02-01 2015-04-22 美商艾斯登强生股份有限公司 造纸机送浆系统及浆料的定量黏度规划方法
DE102006033847A1 (de) * 2006-07-21 2008-01-24 Voith Patent Gmbh Stoffauflauf einer Maschine zur Herstellung einer Faserstoffbahn
DE102007041610B4 (de) 2007-09-03 2009-07-23 Zf Friedrichshafen Ag Aggregat, insbesondere Schwenkmotor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2631353A1 (fr) * 1988-05-13 1989-11-17 Semti Dispositif d'alimentation en melange pateux
US4941950A (en) * 1989-07-26 1990-07-17 Beloit Corporation Headbox with grooved trailing element
FI98938C (fi) * 1996-06-20 1997-09-10 Valmet Corp Laitteisto laimennusvirtauksen yhdistämiseksi paperikoneen/kartonkikoneen jakotukista johdettuun massavirtaukseen
DE20015471U1 (de) * 2000-09-07 2000-11-16 Valmet Corp Im Lippenkanal eines Stoffauflaufs einer Papiermaschine anzubringende Turbulenzbarte

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EP1659214A1 (fr) 2006-05-24
ATE370271T1 (de) 2007-09-15
DE502005001241D1 (de) 2007-09-27
DE102004000051A1 (de) 2006-05-24

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