EP1659214A1 - 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
EP1659214A1
EP1659214A1 EP05110803A EP05110803A EP1659214A1 EP 1659214 A1 EP1659214 A1 EP 1659214A1 EP 05110803 A EP05110803 A EP 05110803A EP 05110803 A EP05110803 A EP 05110803A EP 1659214 A1 EP1659214 A1 EP 1659214A1
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EP
European Patent Office
Prior art keywords
headbox
lamella
structuring
flow
dilution device
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.)
Granted
Application number
EP05110803A
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German (de)
English (en)
Other versions
EP1659214B1 (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
Voith Paper Patent GmbH
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Publication date
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Publication of EP1659214A1 publication Critical patent/EP1659214A1/fr
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Publication of EP1659214B1 publication Critical patent/EP1659214B1/fr
Not-in-force 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
    • 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 pulp suspension, with a sectioned transversely to the machine direction dilution device, in particular Siebwasserdos mecanics worn, in the flow direction of at least one pulp suspension extending transversely to the machine direction intermediate channel, a a plurality of turbulence channels and having partial flow generating turbulence generator and then a headbox is connected downstream, which has a flow space and which is provided with a pulp suspension jet supplying exit gap.
  • Such a headbox is known for example from the European patent EP 0 857 816 B1.
  • the respective blade used has a smooth surface on its two flow surfaces in a known manner. Through this respective smooth surface mixing of emerging from the turbulence generator and entering the headbox partial mixing streams is allowed to emerge from the exit slit of the headbox pulp suspension jet, and even promoted. As a result of this mixing of the partial mixing streams results in a correspondingly increased response width of the dilution water used. A regulation of narrow-wave disturbances in the fibrous web to be produced is thus no longer possible.
  • This object is achieved in that the intermediate channel and / or the flow space of the headbox nozzle by at least one connected to the dilution device or with the turbulence generator by at least one lamella holder and two of at least one pulp suspension touched flow surfaces having fin is divided, that at least one of the two flow surfaces the at least one lamella having an at least partially structured surface is provided, wherein the structuring is preferably selected such that mixing of the partial mixing streams emerging from the dilution device and entering the intermediate channel or emerging from the turbulizer and entering the headbox nozzle is at least impeded, preferably nearly is 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 partial mixing streams are not yet adversely 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 geich 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.
  • the dilution device 3 may be a known white water metering system, as provided in connection with the ModuleJet® headbox available on the market.
  • the ModuleJet® headbox is described for example in German Patent DE 40 19 593 C2. 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 may 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 the further FIGS. 2a to 5a and 2b to 5b, at least one region-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 preferably 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 ' is provided with an at least partially structured surface 13, 13', wherein the structuring is preferably selected such that a Mixing of 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' can be embodied, for example, according to the disclosure of the German published patent application DE 199 62 709 A1.
  • 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 U , 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 Realisierun gsfall probably only a structure 14 for structuring the surface 13, 13 'of the lamella 10, 10' are 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.
  • the lamella 10, 10 ' preferably consists of a CFRP, GFRP, polycarbonate such as Makrolon® or Lexan®, high performance polymer such as polyphenylsulfone, polyethersulfone, polyetherimide or polysulfone 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 both to the surface 13, 13 'of the lower flow surface F U , F U ' and to the surface 13, 13 'of the upper flow surface F O , F O ' is introduced.
  • 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 Lamella length L L , provided with a corresponding structuring along with structure length II.
  • the lamella 10, 10 ' generally has a L ength amellenl l L in the range of 100 to 800 mm and preferably ends 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.
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 true EP1659214A1 (fr) 2006-05-24
EP1659214B1 EP1659214B1 (fr) 2007-08-15

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EP05110803A Not-in-force EP1659214B1 (fr) 2004-11-19 2005-11-16 Caisse de tête d'une machine pour fabriquer une bande fibreuse

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1734178A1 (fr) * 2005-06-13 2006-12-20 Voith Patent GmbH Caisse de tête d'une machine de fabrication d' une bande fibreuse, en particulier une bande de papier ou de carton
EP1881106A1 (fr) * 2006-07-21 2008-01-23 Voith Patent GmbH Caisse de tête d'une machine destinée à la fabrication d'une bande de matière fibreuse
EP1987329A2 (fr) * 2006-02-01 2008-11-05 Astenjohnson, Inc. Caisse de tete et systeme d'alimentation en pate de machine a papier

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007041610B4 (de) 2007-09-03 2009-07-23 Zf Friedrichshafen Ag Aggregat, insbesondere Schwenkmotor

Citations (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
US5814191A (en) * 1996-06-20 1998-09-29 Valmet Corp. Arrangement and method for combining a dilution flow with a stock flow passed out of an inlet header in a paper/board machine
DE20015471U1 (de) * 2000-09-07 2000-11-16 Valmet Corp Im Lippenkanal eines Stoffauflaufs einer Papiermaschine anzubringende Turbulenzbarte

Patent Citations (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
US5814191A (en) * 1996-06-20 1998-09-29 Valmet Corp. Arrangement and method for combining a dilution flow with a stock flow passed out of an inlet header in a paper/board machine
DE20015471U1 (de) * 2000-09-07 2000-11-16 Valmet Corp Im Lippenkanal eines Stoffauflaufs einer Papiermaschine anzubringende Turbulenzbarte

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1734178A1 (fr) * 2005-06-13 2006-12-20 Voith Patent GmbH Caisse de tête d'une machine de fabrication d' une bande fibreuse, en particulier une bande de papier ou de carton
EP1987329A2 (fr) * 2006-02-01 2008-11-05 Astenjohnson, Inc. Caisse de tete et systeme d'alimentation en pate de machine a papier
EP1987329A4 (fr) * 2006-02-01 2010-03-10 Astenjohnson Inc Caisse de tete et systeme d'alimentation en pate de machine a papier
EP1881106A1 (fr) * 2006-07-21 2008-01-23 Voith Patent GmbH Caisse de tête d'une machine destinée à la fabrication d'une bande de matière fibreuse

Also Published As

Publication number Publication date
DE102004000051A1 (de) 2006-05-24
ATE370271T1 (de) 2007-09-15
EP1659214B1 (fr) 2007-08-15
DE502005001241D1 (de) 2007-09-27

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