EP2753752B1 - Machine de fabrication d'une bande de matière fibreuse comprenant un dispositif de transfert et de stabilisation de la bande de matière fibreuse - Google Patents

Machine de fabrication d'une bande de matière fibreuse comprenant un dispositif de transfert et de stabilisation de la bande de matière fibreuse Download PDF

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Publication number
EP2753752B1
EP2753752B1 EP12733462.1A EP12733462A EP2753752B1 EP 2753752 B1 EP2753752 B1 EP 2753752B1 EP 12733462 A EP12733462 A EP 12733462A EP 2753752 B1 EP2753752 B1 EP 2753752B1
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EP
European Patent Office
Prior art keywords
web
fabric
machine according
roll
suction
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Active
Application number
EP12733462.1A
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German (de)
English (en)
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EP2753752A1 (fr
Inventor
Daniel Gronych
Ute Lukschanderl
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Voith Patent GmbH
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Voith Patent GmbH
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Publication date
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Publication of EP2753752A1 publication Critical patent/EP2753752A1/fr
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • 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
    • D21F1/48—Suction apparatus
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections

Definitions

  • the invention relates to a machine for producing a fibrous web, in particular a paper, board or tissue web comprising a device for transferring and stabilizing a moving fibrous web, wherein the fibrous web along the web running path is initially in a first sandwich area between a web-issuing and a web-receiving covering , Then in a transfer section is only on the web-receiving clothing and then located in a second sandwich area between the web-receiving and another stringing and wherein a standing Saugerelement is provided on the web-facing side of the web-receiving fabric, the at least one suction zone in the first sandwich area and at least has a suction zone in the region of the transfer line.
  • the device can be used, for example, in pulp, paper, board or tissue machines.
  • Such devices are known with standing sucking element for transferring a fibrous web from one to another covering, for example WO 2009/118449 A1 and from WO 2009/065433 A1 , Since the standing nipple elements cause wear on the clothing, it is not possible to apply as high a negative pressure for transfer as when using pickup suction rollers or suction rollers as separation rollers.
  • negative pressures of p 0.2 - 0.6 bar below normal pressure quite common. Due to the lower negative pressure in standing suction elements, however, the transfer of the fibrous web is then often not so reliable. In particular, the edges can cause web run problems and breaks in subsequent machine groups. Therefore, the previously known devices with upright vacuum elements are also used only in very slow manufacturing machines and at very high basis weight of the fibrous web, eg in cardboard.
  • the object of the invention is to develop a simple, reliable and low-wear device for transfer and stabilization, in which the Fiber web, especially at the edges is better managed and less web running problems occur, but still less wear on the fabrics is caused.
  • a stabilizing element is provided with a convex surface on the web-facing side of the web-receiving clothing after the nipple element, so that together with the nipple a predominantly or fully curved Bahnlaufweg results from the end of the first sandwich area at least up to a point A, which is between 20 and 150 mm, preferably between 20 and 100 mm, before the beginning of the second sandwich area.
  • a point A which is between 20 and 150 mm, preferably between 20 and 100 mm, before the beginning of the second sandwich area.
  • the convex curvature of the stabilizing element adjoins directly after the curvature of the teat element without a straight line extending therebetween.
  • the suction element is preferably pivotable and / or linearly adjustable, so that at least one operating position and a raised position are adjustable.
  • the sucker element can be designed as a separating sucker, i. If the fibrous web is led a longer distance between two fabrics and then to be taken over on one of the two fabrics. Here, the fabrics run at substantially the same speed.
  • the sucker element can also be designed as a pickup sucker, which is the case when the web is only briefly passed between two clothing to pass the web from one to the other clothing. Here it is helpful and also possible that the web-receiving clothing has a slightly higher speed than the web-dispensing clothing.
  • the stabilizing element can also be carried out with negative pressure acted upon.
  • a higher negative pressure is adjustable than in the stabilizing element. This will e.g. only a higher negative pressure applied directly at the web transfer, while in the other areas only a lower negative pressure is sufficient.
  • the negative pressure should preferably be in the range between 10 and 40 kPa, more preferably between 10 and 30 kPa.
  • the negative pressure if it is evacuated, should preferably be between 0.5 and 20 kPa, more preferably between 0.5 and 15 kPa.
  • the aspiration of the sucker element is preferably carried out by the direct connection to a suction source.
  • the stabilizing element can either be aspirated by the direct connection to a suction or it is generated in the stabilizing element by means of a corresponding Blas Kunststoffdüse a negative pressure or the stabilizing element is connected to the sucker element, that the stabilizing element is indirectly sucked.
  • the stabilization element can also have a plurality of zones which can be acted upon with different negative pressure and are arranged one after the other in the web running direction.
  • a driven roller may be arranged in the clothing loop of the web-receiving clothing preferably in the running direction directly after the stabilizing element. It may be advantageous if the wrapping of the fabric on the driven roller is at least 40 °, more preferably at least 70 °.
  • a speed difference of at least + 0.2%, more preferably of at least + 0.5%, between the web-dispensing and web-receiving clothing and / or between the web-receiving and the other Covering is adjustable.
  • the surface of the teat element or of the stabilizing element which comes into contact with a string, is not damaged or worn too quickly, the surface may preferably consist of a temperature-resistant, in particular also temperature-shock-resistant material, in particular ceramic.
  • the side of the sucker element and the stabilization element facing the clothing has openings, in particular slots and / or bores, via which the negative pressure can act on the clothing and on the fibrous web.
  • the openings are in an area that is narrower than the width of the fabric.
  • the sucker element may have a convex surface on the side facing the clothing.
  • the suction element consists of several parts that are flexibly connected to each other, so that they can adapt to the contour of the guide roller and in particular can be adjusted or pressed something independently of each other.
  • the stabilizing element can be designed as a standing box. He is not moved in relation to the orbital movement of the clothing. Particular attention must be paid to wear in this design.
  • the stabilizing element may be designed as a rotating roller.
  • the rotating roller may in particular be equipped with a drive. Since this roller only as a stabilizing element without or only with a lower vacuum and not as a high vacuum roll, as it is necessary for the web separation or web transfer must be performed, it can be made simpler and thus cheaper.
  • the roller can be directly aspirated or indirectly, by being connected to the suction element via openings and is sucked by this with.
  • the sealing between roller and suction element is preferably carried out via sliding seals, for example via one or more blades which extend across the width, and over side shields, which may consist of plastic, preferably of PU, PE or Teflon.
  • a Grenz Kunststoffabstreifer for example in the form of a scraper blade provided, which repels entrained air from the roll shell, so that it is not introduced into the region of the suction element.
  • Sucker and the running as a rotating roller stabilization element can be connected, in particular by a common support body that they are jointly adjustable or swung.
  • the stabilizing element embodied as a rotating roller and / or the guide roller arranged opposite the concave suction element have a soft polymer cover or a soft polymer coating or a soft polymer surface, preferably one Softness of more than 0 P & J, more preferably of more than 3 P & J is equipped.
  • the stabilizing element designed as a rotating roller and / or the guide roller arranged opposite the concave suction element can have an open storage volume at the surface, in particular in the form of grooves, preferably with a groove depth between 1.5 and 15 mm and preferably with a groove width between 0.5 and 2 mm.
  • the inventive device can be particularly advantageous in a press section of a machine for producing a fibrous web, in particular a paper, board or tissue web with two separately standing, in the web running direction successively arranged press nips, each consisting of a press roll, in particular shoe press roll, and a counter roll will be used.
  • the device is provided between the two press nips, wherein the press section is designed so that the center of the press roll of the first press nip is equal to or higher than the center of the press roll of the second press nip and the center of the counter roll of the first press nip equal to or higher lies as the center of the counter roll of the second press nip.
  • the press section can be designed with two shoe press nips or with a roller nip and a shoe press nip. Likewise, a further press nip may be provided before or after the two press nips.
  • Fig.1 are the two press nips 7,8 a press section shown, which are each formed by a press roller 11,13 and a counter-roller 12,14.
  • the centers of the rolls of the first press nip 7 are each higher than the centers of the corresponding rolls of the second press nip 8.
  • the fibrous web 1 is taken over by a pickup suction roll 9 on the fabric 2 and thus in the press section.
  • the fibrous web 1 is dewatered in the first press nip 7 and then further transported a piece in the sandwich.
  • the convex Sucker 30 fixes the fibrous web 1 on the fabric 3 before the fabric 2 is lifted and is led away around the guide roller 16.
  • the separation point of the two fabrics 2 and 3 can be moved on the sucker element 30.
  • the transfer follows the transfer line, on which the fibrous web 1 is guided freely on the fabric 3.
  • the teat element 30 still extends a distance into the transfer section.
  • the standing convex stabilization element 40 so that there is a continuous curvature of the transfer path.
  • the fibrous web 1 is held by the web tension due to the curvature and, if present on the negative pressure of the stabilizing element 40, which may be lower than that of the sucker element 30, reliably on the fabric 3 until it is again passed between two fabrics 3 and 4.
  • the driven guide roll 17, which follows the next element in the string loop on the stabilizing element 40, pulls on the fabric 3, so that no compression caused by the braking action of the suction and stabilizing elements.
  • the clothing 4 can run faster than the clothing 3, preferably at least 0.2%, particularly preferably at least 0.5% faster.
  • the sandwich area between covering 3 and 4 again follows a transfer section on which the fibrous web 1 is guided freely on the covering 4.
  • the stabilizing element 41 connects, so that here too the curvature is maintained throughout until the fibrous web 1 between the fabric 4 and 5 is guided to the second press nip 8.
  • Adhering to the fabric 5, the fibrous web 1 is guided to the next transfer point and taken there by the pickup suction roll 10 on the fabric 6 of the next group.
  • the fabric 6 may be, for example, a felt of another press or a dryer fabric of the first dryer group.
  • both the arrangement of sucker element 30 and stabilizing element 40, as well as the arrangement of sucker element 31 and stabilizing element 41 represent a device according to the invention.
  • the fabric 2 is the web-dispensing, the fabric 3, the web-receiving and the clothing 4, the further clothing.
  • the fabric 3 is the web-dispensing, the fabric 4, the web-receiving and the fabric 5, the further clothing.
  • the coverings 2, 3, 4 are preferably felts, and the cover 5 is preferably a semipermeable or water-impermeable transfer belt.
  • the fabric 5 may alternatively be a felt.
  • lubricating spray pipes 50,51,52 are provided, which apply low pressure water to the inside of the fabrics just before they are pulled over the standing elements.
  • the spray tube can be equipped with several, possibly overlapping nozzles. It can also be moved oscillating in the transverse direction.
  • individual or all guide rollers 16, 17, 18, 19 should be adjustable and / or pivotable.
  • 1a illustrates the safety distance S, which extends from the point A, the expiration of the fabric 3 from the stabilizing element 40, to the beginning of the second sandwich area, which is formed by the fabric 3 and 4 on the sucker element 31.
  • a preferred length for the safety distance S a value between 20 and 150 mm, more preferably between 20 and 100 mm has been found.
  • Fig.2 a further embodiment of the invention is shown in which the sucker element 32 has a concave surface. This significantly reduces the friction to the clothing. About the employment or contact pressure on the guide roller 16 of the web travel path is still specified. Subsequent to the sucker element 32, the stabilizing element 42, which has changing radii of curvature, follows directly to keep the required space as small as possible. The transfer of the fibrous web 1 on the fabric 4 is carried out with a concave suction element 33, where it was previously performed in sandwich on the rotating stabilizing element 43. In this configuration, no appreciable speed differences between clothing 3 and 4 are possible.
  • 2a illustrates the safety distance S, which extends from the point A, the expiration of the fabric 3 from the stabilizing element 42, to the beginning of the second sandwich region, which is formed by the fabric 3 and 4 on the stabilizing element 43.
  • Figure 3 is an embodiment with a convex suction member 30 combined with a rotating roller as a stabilizing element 44.
  • the sucker member 30 is preferably designed so that it is as close as possible to the roller 44 and that the curvature of the transfer path on the roller 44 continues.
  • the roller 44 and suction member 30 may be connected so that the roller 44 is sucked by the suction member 30. They can also be connected in such a way that they can be swung together or moved together.
  • the transfer to covering 4 takes place with a further convex suction element 31. In the subsequent further transfer line the fibrous web 1 is held by a further roller as a stabilizing element 45.
  • 3a illustrates the safety distance S, which extends from the point A, the expiration of the fabric 3 from the stabilizing element 44, to the beginning of the second sandwich region, which is formed by the fabric 3 and 4 on the sucker element 31.
  • FIG 5 is an execution like after Figure 3 shown with convex suction elements 30,31, in which after stabilizing element 45 formed as a roller but still a stabilizing element 46 follows, so that even on the second transfer path, a predominantly or completely curved path running on the fabric 4 results.
  • the arrangement of suction element 31 and the stabilizing elements 45 and 46 is a device according to the invention.
  • FIG 6 again shows an embodiment similar to the Figure 4 with concave suction elements 32,34.
  • the stabilizing element 45 designed as a roller is followed by a stationary stabilizing element 46, so that a predominantly or completely curved path running on the covering 4 also results on the second transfer path.
  • the arrangement of suction element 34 and the stabilizing elements 45 and 46 is a device according to the invention.
  • the rotating stabilizing element 44 is the designed as a rotating roller stabilizing element 44 and the following guide roller 17 is shown with drive.
  • the rotating stabilizing element 44 or particularly preferably only the guide roller 17 may have a drive in order to ensure sufficient tension both in the Covering as well as in the fibrous web to provide.
  • the convex surface of the stationary stabilizing elements and / or the suction elements can also be formed by a plurality of transversely arranged strips, so that the predominantly curved track running path is achieved in a polygonal course.

Landscapes

  • Treatment Of Fiber Materials (AREA)
  • Nonwoven Fabrics (AREA)
  • Paper (AREA)

Claims (16)

  1. Machine de fabrication d'une bande de matière fibreuse, en particulier d'une bande de papier, de carton ou de papier essuie-tout, comprenant un dispositif pour le transfert et la stabilisation d'une bande de matière fibreuse en mouvement (1), dans laquelle la bande de matière fibreuse (1) se trouve le long d'une trajectoire de bande d'abord dans une première zone sandwich entre une toile (2, 3) cédant la bande et une toile (3, 4) recevant la bande, puis elle repose dans une section de transfert uniquement sur la toile (3, 4) recevant la bande et elle se trouve ensuite dans une deuxième zone sandwich entre la toile (3, 4) recevant la bande et une autre toile (4, 5) et dans laquelle il est prévu un élément aspirant dressé (30, 31, 32, 34) sur le côté de la toile (3, 4) recevant la bande qui est détourné de la bande, lequel présente au moins une zone d'aspiration dans la première zone sandwich et au moins une zone d'aspiration dans la région de la section de transfert, et dans laquelle il est prévu un élément de stabilisation (40, 41, 42, 43, 44, 45, 46) à surface convexe sur le côté de la toile (3, 4) recevant la bande qui est détourné de la bande après l'élément aspirant (30, 31, 32, 34), de telle manière qu'il en résulte avec l'élément aspirant (30, 31, 32, 34) une trajectoire de bande majoritairement ou totalement courbe de la fin de la première zone sandwich jusqu'à un point A, qui se trouve entre 20 et 150 mm avant le commencement de la deuxième zone sandwich, et dans laquelle la courbure convexe de l'élément de stabilisation (40, 41, 42, 43, 44, 45, 46) se raccorde de préférence directement et sans section droite intermédiaire à la courbure de l'élément aspirant (30, 31, 32, 34).
  2. Machine selon la revendication 1, caractérisée en ce que le point A se trouve entre 20 et 100 mm avant le commencement de la deuxième zone sandwich.
  3. Machine selon la revendication 1 ou 2, caractérisée en ce que l'élément de stabilisation (40, 41, 42, 43, 44, 45, 46) peut être soumis à une dépression.
  4. Machine selon la revendication 3, caractérisée en ce que, en fonctionnement avec une bande de matière fibreuse (1), une dépression plus élevée peut être réglée dans au moins une zone d'aspiration de l'élément aspirant (30, 31, 32, 34) que dans l'élément de stabilisation (40, 41, 42, 43, 44, 45, 46).
  5. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un rouleau entraîné (17) est disposé dans la boucle de toile de la toile (3) recevant la bande après l'élément de stabilisation (40, 41, 42, 43, 44, 45, 46), rouleau qui est entouré par la toile (3) de préférence sur au moins 40° et de préférence encore sur au moins 70°.
  6. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu un autre élément aspirant dressé (31, 33, 34) dans la deuxième zone sandwich sur le côté de l'autre toile (4) détourné de la bande.
  7. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la surface de l'élément aspirant (30, 31, 32, 34) et/ou de l'élément de stabilisation (40, 41, 42, 43, 44, 45, 46) venant en contact avec une toile se compose d'un matériau résistant à la température, en particulier de céramique.
  8. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la surface de l'élément aspirant (32, 34) tournée vers la toile est de forme concave et en ce qu'un rouleau de guidage (16) est disposé sur le côté de la toile (2, 3) cédant la bande en face de l'élément aspirant (32, 34), rouleau qui est de préférence réglable en direction verticale et/ou horizontale.
  9. Machine selon la revendication 8, caractérisée en ce qu'il est prévu transversalement à la trajectoire de la bande des baguettes d'étanchéité assemblées de façon flexible à la caisse de l'élément aspirant (32, 34), qui peuvent s'adapter au contour du rouleau de guidage (16) et qui peuvent en particulier y être pressées.
  10. Machine selon une des revendications 8 ou 9, caractérisée en ce que l'élément aspirant (32, 34) se compose de plusieurs parties, qui sont reliées l'une à l'autre de façon flexible, qui peuvent s'adapter au contour du rouleau de guidage (16) et qui peuvent en particulier y être pressées.
  11. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de stabilisation est réalisé sous forme de caisse dressée (40, 41, 42, 43, 46).
  12. Machine selon la revendication 11, caractérisée en ce que la surface de l'élément de stabilisation (40, 41, 42, 43, 46) venant en contact avec la toile est courbée avec au moins deux rayons différents.
  13. Machine selon l'une quelconque des revendications 1 à 10, caractérisée en ce que l'élément de stabilisation est réalisé sous forme de rouleau tournant (44, 45), dans laquelle en particulier un entraînement peut être associé au rouleau tournant (44, 45).
  14. Machine selon l'une quelconque des revendications 8 à 10 et 13, caractérisée en ce que le rouleau tournant (44, 45) et/ou le rouleau de guidage (16) est/sont muni(s) d'un revêtement polymère souple ou d'une couche de polymère souple ou d'une surface de polymère souple, de préférence avec une souplesse de plus de 0 P&J, de préférence encore de plus de 3 P&J.
  15. Machine selon l'une quelconque des revendications 8 à 10 et 13 et 14, caractérisée en ce que le rouleau tournant (44, 45) et/ou le rouleau de guidage (16) présente(nt) un volume d'accumulation ouvert sur la surface, en particulier en forme de rainures, de préférence avec une profondeur de rainure comprise entre 1,5 et 15 mm et de préférence avec une largeur de rainure comprise entre 0,5 et 2 mm.
  16. Machine de fabrication d'une bande de matière fibreuse (1) selon l'une quelconque des revendications précédentes, caractérisée par une section de presses avec deux fentes de pressage (7, 8) placées séparément, disposées l'une après l'autre dans la direction de défilement de la bande, qui sont respectivement formées par un rouleau de pressage (11, 13) sous la forme d'un rouleau de presse à sabot, et un contre-rouleau (12, 14), dans laquelle il est prévu entre les deux fentes de pressage (7, 8) un dispositif pour le transfert et la stabilisation de la bande de matière fibreuse en mouvement et dans laquelle le point central du rouleau de presse à sabot (11) de la première fente de pressage est situé à la même hauteur ou plus haut que le point central du rouleau de presse à sabot (13) de la deuxième fente de pressage et le point central du contre-rouleau (12) de la première fente de pressage est situé à la même hauteur ou plus haut que le point central du contre-rouleau (14) de la deuxième fente de pressage.
EP12733462.1A 2011-09-06 2012-07-03 Machine de fabrication d'une bande de matière fibreuse comprenant un dispositif de transfert et de stabilisation de la bande de matière fibreuse Active EP2753752B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110082159 DE102011082159A1 (de) 2011-09-06 2011-09-06 Vorrichtung zur Übergabe und Stabilisierung einer Faserstoffbahn
PCT/EP2012/062879 WO2013034330A1 (fr) 2011-09-06 2012-07-03 Dispositif de transfert et de stabilisation d'une bande de matière fibreuse

Publications (2)

Publication Number Publication Date
EP2753752A1 EP2753752A1 (fr) 2014-07-16
EP2753752B1 true EP2753752B1 (fr) 2016-11-16

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EP12733462.1A Active EP2753752B1 (fr) 2011-09-06 2012-07-03 Machine de fabrication d'une bande de matière fibreuse comprenant un dispositif de transfert et de stabilisation de la bande de matière fibreuse

Country Status (4)

Country Link
EP (1) EP2753752B1 (fr)
CN (1) CN103764907B (fr)
DE (1) DE102011082159A1 (fr)
WO (1) WO2013034330A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT15442U1 (de) 2015-03-26 2017-09-15 Voith Patent Gmbh Pressenvorrichtung
DE102016218199A1 (de) 2016-09-22 2018-03-22 Voith Patent Gmbh Schmiereinrichtung zum Schmieren eines Bandes
WO2018206216A1 (fr) * 2017-05-10 2018-11-15 Voith Patent Gmbh Dispositif et procédé de fabrication d'une bande de matière fibreuse
KR101912591B1 (ko) * 2018-06-18 2018-10-31 주식회사 삼우디티피 염색가공용 도포장치

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009065433A1 (fr) 2007-11-19 2009-05-28 Metso Paper, Inc. Procédé et dispositif pour transférer une bande de papier d'un tissu de soutien sur un autre
FI127367B (fi) 2008-03-28 2018-04-30 Valmet Technologies Inc Kuiturainakoneen siirtoimulaatikko

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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Also Published As

Publication number Publication date
EP2753752A1 (fr) 2014-07-16
CN103764907B (zh) 2015-09-16
CN103764907A (zh) 2014-04-30
DE102011082159A1 (de) 2013-03-07
WO2013034330A1 (fr) 2013-03-14

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