EP1536062B1 - Section de formage à deux toiles pour une machine de fabrication d'une bande de matériau fibreux et procédé correspondant - Google Patents

Section de formage à deux toiles pour une machine de fabrication d'une bande de matériau fibreux et procédé correspondant Download PDF

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Publication number
EP1536062B1
EP1536062B1 EP03104438A EP03104438A EP1536062B1 EP 1536062 B1 EP1536062 B1 EP 1536062B1 EP 03104438 A EP03104438 A EP 03104438A EP 03104438 A EP03104438 A EP 03104438A EP 1536062 B1 EP1536062 B1 EP 1536062B1
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EP
European Patent Office
Prior art keywords
suction
wire
regulated
chamber
controlled
Prior art date
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Expired - Lifetime
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EP03104438A
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German (de)
English (en)
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EP1536062A1 (fr
Inventor
Erich Brunnauer
Franz Stelzhammer
Manfred Gloser
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Voith Patent GmbH
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Voith Patent GmbH
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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
    • D21F1/32—Washing wire-cloths or felts
    • 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 former for a machine for producing a fibrous web, in particular a paper or board web, from at least one pulp suspension, with two continuous endless screens, which converge to form a wedge-shaped Stoffeinlaufspalts which receives the pulp suspension directly from a headbox, and then form a Doppelpsiebrange, in which-seen in Sieblaufraum- the two screens at least one, in the direction of wire direction successively arranged forming unit and dewatering unit, each remove at least by means of negative pressure water from the introduced between the two sieves pulp suspension through the respective sieve, and then from each other are separated, wherein the forming fibrous web remains on a sieve, according to the preamble of claim 1.
  • the invention further relates to a process for producing a fibrous web, in particular a paper or board web, from at least one fibrous suspension according to the preamble of claim 19.
  • twin-wire former is, for example, the two German Offenlegungsschriften DE 198 03 591 ( PB10656 EN ) and DE 196 51 493 A1 ( PB10449 DE ) of the applicant. It is now used in the manufacture of paperboard and packaging papers at low production speeds, and in the future these grades are also to be produced at higher production speeds. Thus, drastically increases the problem of contamination of the twin wire former and adjacent assemblies due to the increased entrainment of steam, such as water vapor mist and the same. This entrainment of windrows is particularly important in the coarser screen types used for the production of cardboard and packaging papers, since they carry much larger amounts of steam than, for example, the narrower screen types for high-speed paper machines, in particular for newspaper printing.
  • a twin-wire former according to the invention in that at least one suction device is provided with at least one suction opening for discharging swaths in the respective course of at least one of the two screens.
  • This extraction device according to the invention causes a fast and efficient extraction of swaths, moreover as close as possible to the place of their formation.
  • the suction device is designed as at least a two-chamber system, the first larger, preferably top-mounted chamber for collecting and discharging the water and the second smaller, preferably mounted on the underside chamber for collecting and discharging the air is designed, the first chamber preferably in the discharge direction aligned guide system, in particular vanes, and wherein the supply of air into the second chamber by means of laterally above the first chamber beginning and opening into the second chamber channels. So that the smallest possible amount of ambient air is extracted, the clear distance between the suction opening and the adjacent sieve is minimized, preferably less than 300 mm.
  • the suction device is preferably provided in a region of the course of the corresponding screen, in which the screen is not in direct contact with the fibrous web to be produced. This completely avoids a possible influence of the suction device on the fibrous web to be produced.
  • the efficiency of the suction device is not imperceptibly increased thereby.
  • the suction device which is preferably designed as a slot suction device, as a hood suction device or as a space suction device, be arranged inside or outside the loop of the endless screen.
  • the slot extraction is conveniently arranged in the region of a free run of the corresponding screen, whereas the hood extraction is preferably arranged in the region of a deflection of the corresponding screen, wherein in the region of the deflection preferably at least one HD spray tube for acting on the screen with a cleaning medium , in particular cleaning liquid, is attached.
  • the suction device extends ideally over the entire width of the fibrous web to be produced, wherein the suction opening and / or a plurality of suction openings, which are preferably designed as suction nozzles, can extend over the entire width of the fibrous web to be produced.
  • the suction openings or the suction nozzles are combined into two or more sections with at least two suction openings or suction nozzles per section, wherein preferably each section of suction openings or suction nozzles can be assigned throttle valves or the like. This allows adjustability of the sectional suction.
  • the suction openings or suction nozzles preferably have polygonal suction contours.
  • the polygonal suction contours of the suction openings or suction nozzles may be rectangles and / or squares and / or rhombuses and / or ellipses and / or ovals and / or circles.
  • the suction device has at least one controllable suction pump.
  • the suction device has two controllable suction pumps, two controllable exhaust fans or the like, which suck on the driver's or drive side half of the plurality of suction openings, and / or each section of suction or extraction nozzles has a suction pump, an exhaust fan or similar with controllable / preferably and preferably single drive on and / or each suction opening or each suction nozzle has a suction pump, an exhaust fan or the like with controllable / controllable and preferably single drive.
  • the suction pump, the exhaust fan or the like a controllable / controllable extraction volume in the range of 1 to 40 m 3 / h per m working width per m / min screen speed, preferably from 1.4 to 25 m 3 / h per meter working width per m / min screen speed, up.
  • the suction pump, the exhaust fan or the like in this case generates a controllable / suction speed in the range of 10 to 25 m / s, preferably from 12 to 20 m / s.
  • the inventive output is procedurally achieved in that at least one of the two screens in the respective course is acted upon by at least one suction device with at least one suction opening for the removal of steam.
  • the suction device is again designed as a two-chamber system. This inventive method causes a quick and efficient extraction of windrows, moreover as close as possible to the place of their formation.
  • FIG. 1 shows a schematic side view of a twin-wire former 1 of a machine for producing a fibrous web 2, in particular a paper or board web, from at least one pulp suspension 3, with two continuous endless sieves (bottom wire 4, top wire 5), forming a wedge-shaped Stoffeinlaufspalts 6, the directly from a headbox 7 receives the pulp suspension 3, converge and then form a Doppelsiebrange 8, in which -in Sieblaufraum S (arrow) seen- the two wires 4, 5 at least one, in the direction of wire direction S (arrow) successively arranged forming unit 9 and Dewatering unit 10, each of which at least by means of negative pressure water from the introduced between the two sieves 4, 5 pulp suspension 3 through the respective sieve 4, 5, pass and then separated from each other, wherein the forming fibrous web 2 remains on the wire 4.
  • the headbox 7 can also be used as a multi-layer headbox and / or as a headbox with sectioned dilution water technology ("Module Jet" system).
  • the lower wire 4 passes over a peripheral portion 11 of a preferably evacuated forming roller 12 with indicated vacuum device and the top wire 5 passes over a peripheral portion 13 of a breast roll 14.
  • the formed by the two wires 4, 5 Doppeltelsiebsize 8 runs after the expiry of the forming roller 12 at an angle ⁇ from -50 ° to + 50 ° to an imaginary vertical plane V down.
  • a guide roller 15.1 is arranged, which deflects the two wires 4, 5 in a preferably substantially horizontal direction L (arrow).
  • the two wires 4, 5 run over a separating device 16 which separates the top wire 5 from the fibrous web 2 formed and the bottom wire 4.
  • the top wire 5 runs over guide rollers 17 back to the breast roller 14, whereas the bottom wire 4 is guided with the fibrous web 2 thereon via an optional Siebsaugwalze 18 to a pickup roller 19, before then it also runs over guide rollers 17 back to the forming roller 12.
  • the twin-wire former 1 shown here according to the embodiment of the already mentioned German Offenlegungsschrift DE 198 03 591 A1 ( PB10656 EN ) of the applicant can in a further embodiment according to the embodiment of German patent application DE 196 51 493 A1 ( PB10449 DE ) of the applicant.
  • the possible execution of the twin-wire former is not intended to be based on the embodiment according to the FIG. 1 be limited, the execution according to the FIG. 1 is intended to be merely exemplary in nature of a variety of possible embodiments for the twin-wire former.
  • suction device 20 with at least one suction opening 21 for the removal of windrows 22 is provided. It is provided that the suction device 20.1 to 20.5 is provided in a region of the course of the corresponding screen 4, 5, in which the screen 4, 5 is not in direct contact with the fibrous web 2 to be produced.
  • the in the FIG. 1 schematically indicated suction 20.1 to 20.5 are purely exemplary, both in terms of their number and their locations.
  • the suction device 20.5 is formed as a Schlitzabsaugung and arranged in the region of a free run of the screen 5, whereas the suction device 20.3 is designed as a hood suction and is arranged in the region of a deflection of the sieve 4, wherein in the region of the deflecting element 17 (guide roller) preferably at least one known HD spray tube 23 for applying the sieve 4 with a cleaning medium 24, in particular cleaning liquid attached.
  • the suction device may be formed in a further embodiment as a specially designed Kunststoffabsaugungs arthritis.
  • each suction device 20.1 to 20.5 extends over the entire width B of the fibrous web 2 to be produced.
  • FIGS. 2 to 5 show schematic views of various suction devices 20.
  • suction device 20 has, by way of example, two, preferably a plurality of suction openings 21, which extend ideally over the entire width B of the fibrous web 2 to be produced with a screen direction S (arrow), wherein the screen 4 (5) is guided over a guide roller 17 ,
  • the illustrated suction device 20 is a slot suction with polygonal suction openings 21 and suction nozzle 25 in the form of rectangles. The size and the distance between the rectangles are selectable.
  • the suction device 20 has two controllable and controllable and schematically illustrated suction pumps 26, the leader or drive side, the half of the plurality of suction holes 21; the suction channel 27 of the suction device 20 is in this case advantageously divided in the middle (dash-dot line).
  • the reference numeral can also be schematically illustrated an exhaust fan or the like; this applies to everyone FIGS. 2 to 5 ,
  • suction device 20 is as a over the entire width B of the produced fibrous web 2 of time away extending hood extraction is formed and it is arranged in the region of a deflection of the screen 4 (5), wherein in the region of the deflecting element 17 (guide roller) an HD spray tube 23 for applying the sieve 4 (5) with a cleaning medium 24, in particular cleaning liquid attached.
  • the suction device may be formed in a further embodiment as a specially designed Jardinabsaugungs Surprise.
  • the suction device 20 has in FIG. 3 two, preferably a plurality of exhaust ports 21 designed as suction.
  • Each suction opening 21 or each suction nozzle 25 has a suction pump 26 with controllable / controllable and preferably single drive 27, the in FIG. 4 are shown in detailed form.
  • the clear distance A between the suction openings 21 and the adjacent wire 4 (5) is minimized, preferably less than 300 mm.
  • suction device 20 is designed as a "slot suction", which has a plurality of extending over the entire width B of the fibrous web 2 to be produced suction openings 21 with corresponding suction nozzle 25 and a common suction channel 27.
  • the "Schlitzabsaugung” can be performed in a further embodiment with only a single slot (dashed line).
  • the suction openings 21 and the suction nozzle 25 have polygonal suction contours, in FIG. 4 these are circles.
  • the polygonal suction contours of the suction openings 21 or suction nozzles 25 can also be rectangles and / or squares and / or rhombuses and / or ellipses and / or ovals, this list of suction contours having merely exemplary character.
  • the suction device 20 of the FIG. 4 has a controllable / suction pump 26 with controllable / controllable single drive 27, such as an electric motor, on.
  • the suction openings 21 and the suction nozzle 25 of the suction device 20 of the FIG. 4 also be combined into two or more sections with at least two suction openings 21 and exhaust port 25 per section.
  • each section of suction openings 21 or suction 25 throttle valves 28 or the like, in turn, each section of suction openings 21 and suction nozzle 25 may have a suction pump 26 with controllable / controllable and preferably single drive 27.
  • the two left-hand suction openings 21 and / or suction connection 25 are designed to form such a section N with a corresponding configuration.
  • FIG. 5 illustrated and extending over the entire width B of the fibrous web 2 to be produced away suction device 20 is inventively designed as at least a two-chamber system 29, the first larger, preferably upper-side chamber 29.1 for collecting and discharging the water 32 (arrow) and the second smaller, preferably
  • the first chamber 29.1 preferably has a guide system 30 oriented in the discharge direction R (arrow), in particular guide vanes 30.1 known to the person skilled in the art, and wherein the supply of air 33 (FIG. Arrow) into the second chamber 29.2 by means of laterally above the first chamber 29.1 beginning and opening into the second chamber 29.2 channels 31 takes place.
  • the at least one suction pump 26 has a controllable suction volume in the range from 1 to 40 m 3 / h per m working width per m / min wire speed, preferably from 1.4 to 25 m 3 / h per meter working width per m / min screen speed, and that the respective at least one suction pump 26 generates a controllable extraction speed in the range of 10 to 25 m / s, preferably 12 to 20 m / s.
  • the described twin-wire former 1 with a suction device 20 according to the invention is also particularly suitable for carrying out the method according to the invention, wherein at least one of the two wires 4, 5 in the respective Course is acted upon by means of at least one suction device 20 with at least one suction opening 21 for the removal of swaths 22.
  • the invention provides an improved twin-wire former and an improved method of the aforementioned types, with which on the one hand, deposition of deposits in the area of the twin-wire former and adjacent assemblies is considerably reduced or completely prevented and, on the other hand, no technological disadvantages due to a change Construction in the field of twin wire must be taken into account.

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

Claims (35)

  1. Section de formage à deux toiles (1) pour une machine de fabrication d'une bande fibreuse (2), en particulier une bande de papier ou de carton, constituée d'au moins une suspension fibreuse (3), avec deux toiles sans fin en mouvement (4, 5), qui se réunissent en formant une fente d'entrée de matière cunéiforme (6), qui reçoit la suspension fibreuse (3) directement d'une caisse de tête (7), et qui forment ensuite une section à deux toiles (8), dans laquelle - vu dans la direction d'avance des toiles (S) - les deux toiles (4, 5) passent à chaque fois au moins par une unité de formage (9) et une unité d'égouttage (10) disposées successivement dans la direction d'avance des toiles (S), qui éliminent l'eau à travers la toile respective (4, 5), à chaque fois au moins par l'intermédiaire d'une dépression, hors de la suspension fibreuse (3) introduite entre les deux toiles (4, 5), puis se séparent l'une de l'autre, la bande fibreuse (2) qui se forme restant sur une toile (4),
    caractérisée en ce que
    dans chaque étendue d'au moins l'une des deux toiles (4, 5), au moins un dispositif d'aspiration (20, 20.1 à 20.5) est muni d'au moins une ouverture d'aspiration (21) pour évacuer les vapeurs (22), et en ce que l'au moins un dispositif d'aspiration (20, 20.1 à 20.5) est réalisé sous forme d'au moins un système de chambre double (29), dont la première chambre plus grande (29.1) de préférence installée en haut, est conçue pour recueillir et évacuer l'eau (32) (flèche) et dont la deuxième chambre plus petite (29.2) installée de préférence en bas, est conçue pour recueillir et évacuer l'air (33) (flèche), la première chambre (29.1) présentant de préférence un système directeur (30) orienté dans la direction d'évacuation (R), notamment des pales directrices (30.1), et l'alimentation en air (33) (flèche) dans la deuxième chambre (29.2) s'effectuant au moyen de canaux (31) commençant latéralement au-dessus de la première chambre (29.1) et débouchant dans la deuxième chambre (29.2).
  2. Section de formage à deux toiles (1) selon la revendication 1,
    caractérisée en ce que
    le dispositif d'aspiration (20, 20.1 à 20.5) est prévu dans une région de l'étendue de la toile correspondante (4, 5) dans laquelle la toile (4, 5) n'est pas en contact direct avec la bande fibreuse à fabriquer (2).
  3. Section de formage à deux toiles (1) selon la revendication 1 ou 2,
    caractérisée en ce que
    le dispositif d'aspiration (20, 20.1, 20.2, 20.4) est disposé à l'intérieur de la boucle de la toile sans fin (4, 5).
  4. Section de formage à deux toiles (1) selon la revendication 1 ou 2,
    caractérisée en ce que
    le dispositif d'aspiration (20, 20.3, 20.5) est disposé en dehors de la boucle de la toile sans fin 4, 5).
  5. Section de formage à deux toiles (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la distance intérieure entre l'ouverture d'aspiration (21) et la toile adjacente (4, 5) est minimale, de préférence inférieure à 300 mm.
  6. Section de formage à deux toiles (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le dispositif d'aspiration (20, 20.1 à 20.5) s'étend sur toute la largeur (B) de la bande fibreuse (2) à fabriquer.
  7. Section de formage à deux toiles (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'ouverture d'aspiration (21) s'étend sur toute la largeur (B) de la bande fibreuse (2) à fabriquer.
  8. Section de formage à deux toiles (1) selon l'une quelconque des revendications 1 à 6,
    caractérisée en ce
    qu'une pluralité d'ouvertures d'aspiration (21) s'étend sur toute la largeur (B) de la bande fibreuse (2) à fabriquer.
  9. Section de formage à deux toiles (1) selon la revendication 8,
    caractérisée en ce que
    les ouvertures d'aspiration (21) sont rassemblées en deux ou plusieurs sections avec au moins deux ouvertures d'aspiration (21) par section.
  10. Section de formage à deux toiles (1) selon la revendication 9,
    caractérisée en ce que
    de préférence on associe à chaque section d'ouvertures d'aspiration (21) des clapets d'étranglement.
  11. Section de formage à deux toiles (1) selon la revendication 10,
    caractérisée en ce que
    les ouvertures d'aspiration (21) présentent des contours d'aspiration polygonaux.
  12. Section de formage à deux toiles (1) selon la revendication 11,
    caractérisée en ce que
    les contours d'aspiration polygonaux des ouvertures d'aspiration (21) sont des rectangles et/ou des carrés et/ou des losanges et/ou des ellipses et/ou des ovales et/ou des cercles.
  13. Section de formage à deux toiles (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le dispositif d'aspiration (20, 20.1 à 20.5) présente au moins une pompe d'aspiration commandable/réglable, un ventilateur d'aspiration commandable/réglable ou similaire.
  14. Section de formage à deux toiles (1) selon la revendication 13,
    caractérisée en ce que
    le dispositif d'aspiration (20, 20.1 à 20.5) présente deux pompes d'aspiration commandables/réglables, deux ventilateurs d'aspiration commandables/réglables ou similaires, qui aspirent, du côté opérateur ou du côté entraînement, la moitié de la pluralité des ouvertures d'aspiration (21).
  15. Section de formage à deux toiles (1) selon la revendication 9,
    caractérisée en ce que
    chaque section d'ouvertures d'aspiration (21) présente une pompe d'aspiration, un ventilateur d'aspiration ou similaire avec un entraînement commandable/aspirable et de préférence séparé.
  16. Section de formage à deux toiles (1) selon la revendication 13,
    caractérisée en ce que
    chaque ouverture d'aspiration (21) présente une pompe d'aspiration, un ventilateur d'aspiration ou similaire avec un entraînement commandable/réglable et de préférence séparé.
  17. Section de formage à deux toiles (1) selon l'une quelconque des revendications 13 à 16,
    caractérisée en ce que
    la pompe d'aspiration, le ventilateur d'aspiration ou similaire présente un volume d'aspiration commandable/réglable de l'ordre de 1 à 40 m3/h par m de largeur de travail par m/min de vitesse d'avance de toile, de préférence de 1,4 à 25 m3/h par m de largeur de travail par m/min de vitesse d'avance de toile.
  18. Section de formage à deux toiles (1) selon l'une quelconque des revendications 13 à 17,
    caractérisée en ce que
    la pompe d'aspiration, le ventilateur d'aspiration ou similaire produit une vitesse d'aspiration commandable/réglable de l'ordre de 10 à 25 m/s, de préférence de 12 à 20 m/s.
  19. Procédé de fabrication d'une bande fibreuse (2), en particulier une bande de papier ou de carton, constituée d'au moins une suspension fibreuse (3), avec deux toiles sans fin en mouvement (4, 5), qui se réunissent en formant une fente d'entrée de matière cunéiforme (6), qui reçoit la suspension fibreuse (3) directement d'une caisse de tête (7), et qui forment ensuite une section à deux toiles (8), dans laquelle - vu dans la direction d'avance des toiles (S) - les deux toiles (4, 5) passent à chaque fois au moins par une unité de formage (9) et une unité d'égouttage (10) disposées successivement dans la direction d'avance des toiles (S), qui éliminent l'eau à travers la toile respective (4, 5), à chaque fois au moins par l'intermédiaire d'une dépression, hors de la suspension fibreuse (3) introduite entre les deux toiles (4, 5), puis se séparent l'une de l'autre, la bande fibreuse (2) qui se forme restant sur une toile (4),
    caractérisé en ce que
    au moins l'une des deux toiles (4, 5) est sollicitée, dans chaque étendue, au moyen d'au moins un dispositif d'aspiration (20, 20.1 à 20.5) comprenant au moins une ouverture d'aspiration (21) pour évacuer les vapeurs (22) et en ce que la sollicitation s'effectue au moyen d'au moins un dispositif d'aspiration (20, 20.1 à 20.5) réalisé sous forme de système à deux chambres (29), dont la première chambre plus grande (29.1) de préférence installée en haut, est conçue pour recueillir et évacuer l'eau (32) (flèche) et dont la deuxième chambre plus petite (29.2) installée de préférence en bas, est conçue pour recueillir et évacuer l'air (33) (flèche), la première chambre (29.1) présentant de préférence un système directeur (30) orienté dans la direction d'évacuation, notamment des pales directrices (30.1), et l'alimentation en air (33) (flèche) dans la deuxième chambre (29.2) s'effectuant au moyen de canaux (31) commençant latéralement au-dessus de la première chambre (29.1) et débouchant dans la deuxième chambre (29.2).
  20. Procédé selon la revendication 19,
    caractérisé en ce que
    la sollicitation a lieu dans une région de l'étendue de la toile correspondante (4, 5), dans laquelle la toile (4, 5) n'est pas en contact direct avec la suspension fibreuse (3).
  21. Procédé selon la revendication 19 ou 20,
    caractérisé en ce que
    la sollicitation a lieu par un dispositif d'aspiration (20, 20.1, 20.2, 20.4) disposé à l'intérieur de la boucle de la toile sans fin (4, 5).
  22. Procédé selon la revendication 19 ou 20,
    caractérisé en ce que
    la sollicitation a lieu par un dispositif d'aspiration (20, 20.3, 20.5) disposé à l'extérieur de la boucle de la toile sans fin (4, 5).
  23. Procédé selon l'une quelconque des revendications 19 à 22,
    caractérisé en ce que
    la sollicitation de la toile (4, 5) a lieu dans la région de son renvoi.
  24. Procédé selon l'une quelconque des revendications 19 à 23,
    caractérisé en ce que
    la distance intérieure entre l'ouverture d'aspiration (21) et la toile adjacente (4, 5) est minimisée, de préférence est ajustée pour être inférieure à 300 mm.
  25. Procédé selon l'une quelconque des revendications 19 à 24,
    caractérisé en ce que
    la bande fibreuse (2) à fabriquer est de préférence sollicitée sur toute la largeur (B).
  26. Procédé selon l'une quelconque des revendications 19 à 25,
    caractérisé en ce que
    la bande fibreuse (2) à fabriquer est de préférence sollicitée sur toute la largeur (B) au moyen d'une ouverture d'aspiration (21).
  27. Procédé selon l'une quelconque des revendications 19 à 25,
    caractérisé en ce que
    la bande fibreuse (2) à fabriquer est de préférence sollicitée sur toute la largeur (B) au moyen d'une pluralité d'ouvertures d'aspiration (21), qui sont réunies de préférence en sections (N).
  28. Procédé selon la revendication 27,
    caractérisé en ce que
    la bande fibreuse (2) à fabriquer est sollicitée par des ouvertures d'aspiration (21), qui sont réunies en deux ou plusieurs sections avec au moins deux ouvertures d'aspiration (21) par section.
  29. Procédé selon la revendication 28,
    caractérisé en ce que
    de préférence on associe à chaque section d'ouvertures d'aspiration (21) des clapets d'étranglement ou similaires.
  30. Procédé selon l'une quelconque des revendications 19 à 29,
    caractérisé en ce que
    le dispositif d'aspiration (20, 20.1 à 20.5) est sollicité par au moins une pompe d'aspiration commandable/réglable, un ventilateur d'aspiration commandable/réglable ou similaire.
  31. Procédé selon la revendication 30,
    caractérisé en ce que
    le dispositif d'aspiration (20, 20.1 à 20.5) est sollicité par deux pompes d'aspiration commandables/réglables, deux ventilateurs d'aspiration commandables/réglables ou similaires, qui aspirent, du côté opérateur ou du côté entraînement, la moitié de la pluralité des ouvertures d'aspiration (21).
  32. Procédé selon la revendication 28,
    caractérisé en ce que
    chaque section d'ouvertures d'aspiration (21) est sollicitée par une pompe d'aspiration, un ventilateur d'aspiration ou similaire avec un entraînement commandable/réglable et de préférence séparé.
  33. Procédé selon la revendication 30,
    caractérisé en ce que
    chaque ouverture d'aspiration (21) est sollicitée par une pompe d'aspiration, un ventilateur d'aspiration ou similaire avec un entraînement commandable/réglable et de préférence séparé.
  34. Procédé selon l'une quelconque des revendications 19 à 33,
    caractérisé en ce que
    la pompe d'aspiration, le ventilateur d'aspiration ou similaire est entraîné avec un volume d'aspiration commandable/réglable de l'ordre de 1 à 40 m3/h par m de largeur de travail par m/min de vitesse d'avance de toile, de préférence de 1,4 à 25 m3/h par m de largeur de travail par m/min de vitesse d'avance de toile.
  35. Procédé selon l'une quelconque des revendications 30 à 34,
    caractérisé en ce que
    la pompe d'aspiration, le ventilateur d'aspiration ou similaire est entraîné à une vitesse d'aspiration commandable/réglable de l'ordre de 10 à 25 m/s, de préférence de 12 à 20 m/s.
EP03104438A 2002-11-28 2003-11-28 Section de formage à deux toiles pour une machine de fabrication d'une bande de matériau fibreux et procédé correspondant Expired - Lifetime EP1536062B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10255471 2002-11-28
DE10255471A DE10255471A1 (de) 2002-11-28 2002-11-28 Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren

Publications (2)

Publication Number Publication Date
EP1536062A1 EP1536062A1 (fr) 2005-06-01
EP1536062B1 true EP1536062B1 (fr) 2008-05-07

Family

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EP03104438A Expired - Lifetime EP1536062B1 (fr) 2002-11-28 2003-11-28 Section de formage à deux toiles pour une machine de fabrication d'une bande de matériau fibreux et procédé correspondant

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Country Link
EP (1) EP1536062B1 (fr)
AT (1) ATE394541T1 (fr)
DE (2) DE10255471A1 (fr)
ES (1) ES2305405T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10255471A1 (de) * 2002-11-28 2004-07-22 Voith Paper Patent Gmbh Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren
FI117291B (fi) * 2005-06-01 2006-08-31 Metso Paper Inc Menetelmä ja laite sumutuksen estämiseksi paperikoneen viiraosalla
DE102005037644A1 (de) * 2005-08-05 2007-02-08 Voith Patent Gmbh Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn
DE102009000803A1 (de) 2009-02-12 2010-08-19 Voith Patent Gmbh Doppelsiebformer
US10201840B2 (en) * 2012-04-11 2019-02-12 Gpcp Ip Holdings Llc Process for cleaning a transport belt for manufacturing a paper web
SE2051044A1 (en) * 2020-09-04 2021-10-05 Valmet Oy Crescent former for producing tissue paper

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3842155A1 (de) * 1988-12-15 1990-06-21 Voith Gmbh J M Doppelsiebformer zur herstellung einer papierbahn
DE4328024A1 (de) * 1993-08-20 1995-02-23 Voith Gmbh J M Doppelsieb-Blattbildner
DE9417875U1 (de) * 1994-11-08 1995-01-05 J.M. Voith Gmbh, 89522 Heidenheim Vorrichtung zum Reinigen eines bewegten Siebes, insbesondere des umlaufenden Siebes einer Papiermaschine
DE19651493A1 (de) * 1996-12-11 1998-06-18 Voith Sulzer Papiermasch Gmbh Siebpartie und Verfahren zum Formen einer mehrlagigen Faserstoffbahn
DE19704443A1 (de) * 1997-02-06 1998-08-13 Voith Sulzer Papiermasch Gmbh Verfahren und Papiermaschine zur Herstellung einer mehrlagigen Faserstoffbahn
DE19803591A1 (de) * 1998-01-30 1999-08-05 Voith Sulzer Papiertech Patent Doppelsieb-Former
DE10021320A1 (de) * 2000-05-02 2001-11-08 Voith Paper Patent Gmbh Doppelsiebformer
DE20013887U1 (de) * 2000-08-11 2000-10-26 Voith Sulzer Papiertechnik Patent GmbH, 89522 Heidenheim Konditionier- und/oder Reinigungsvorrichtung
DE10255471A1 (de) * 2002-11-28 2004-07-22 Voith Paper Patent Gmbh Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren

Also Published As

Publication number Publication date
DE50309799D1 (de) 2008-06-19
EP1536062A1 (fr) 2005-06-01
ES2305405T3 (es) 2008-11-01
ATE394541T1 (de) 2008-05-15
DE10255471A1 (de) 2004-07-22

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