EP1712501A2 - Elément de guidage d'une bande - Google Patents

Elément de guidage d'une bande Download PDF

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Publication number
EP1712501A2
EP1712501A2 EP06110145A EP06110145A EP1712501A2 EP 1712501 A2 EP1712501 A2 EP 1712501A2 EP 06110145 A EP06110145 A EP 06110145A EP 06110145 A EP06110145 A EP 06110145A EP 1712501 A2 EP1712501 A2 EP 1712501A2
Authority
EP
European Patent Office
Prior art keywords
web
guiding element
element according
web guiding
inner layer
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.)
Withdrawn
Application number
EP06110145A
Other languages
German (de)
English (en)
Other versions
EP1712501A3 (fr
Inventor
Manfred Ueberschär
Benjamin Méndez-Gallon
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.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1712501A2 publication Critical patent/EP1712501A2/fr
Publication of EP1712501A3 publication Critical patent/EP1712501A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/32—Arrangements for turning or reversing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/111—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/113—Details of the part distributing the air cushion
    • B65H2406/1131—Porous material

Definitions

  • the invention relates to a web guide for guiding and / or deflection of a running paper, cardboard or other fibrous web, which is acted upon with compressed gas and extends substantially over the entire width of the fibrous web, comprising a jacket with a fibrous web associated Bruleit Structure and at least a gas-permeable, porous layer to form a support film between the web guide surface and the fibrous web running over it.
  • a web guiding element with an air-permeable, porous and cylindrically shaped surface is already known from various documents. On the DE-A1 103 22 519 should be referenced here.
  • baffles With such baffles a defined uniform air distribution should be possible so that the fibrous web can be guided without contact and without the risk of wrinkles during their run through a manufacturing and / or finishing machine.
  • the invention is therefore based on the object to provide a particularly improved in this respect web guiding element with which a contactless guidance and deflection of a fibrous web is possible.
  • the object of the invention is achieved by a specified in the characterizing part of claim 1 Bruleitelement.
  • the jacket of the Bruleitiatas consists of an inner and an outer layer, wherein the outer layer of the gas-permeable, porous material.
  • the inner layer is designed to have a stability-forming effect.
  • this inner layer has a multiplicity of passage openings, which are connected to at least one pressure chamber for acting on the web guide element with the compressed gas.
  • both layers that is to say the outer and the inner layer, are of continuous design, so that their production is less complicated.
  • the compressed gas used is conditioned air (cleaned and filtered).
  • the inventors have recognized that the air, as it flows through the web guiding element or the multi-layered jacket in the radial direction from the inside to the outside towards the fibrous web to be guided, experiences a large pressure drop. This pressure drop causes constant amounts of air to be released. Surprisingly, this works even in those cases where the distance between the web guiding element and the fibrous web is different, ie uneven.
  • At least one pressure chamber is mounted in the interior of Bruleitiatas, which makes it possible to flow against the shell of the Bruleitiatas with the compressed gas or compressed air from the inside.
  • the arrangement of several peripherally mounted pressure chambers is expedient.
  • the number and size of the pressure chambers depend on the size of the entire Bruleitiatas. In other words, the size is determined by the desired functional area, that is to say the area around which the fibrous web is to wrap. So is a complete circular cylindrical cross-sectional shape, as well as a quarter-circle shape with just such wrap, also a training in semicircular shape with wrap of 180 °, but also a straight and flat design possible.
  • the inner layer responsible for the stability ie also the support function, has a multiplicity of passage openings. These are in communication with the at least one pressure chamber arranged below Compressed air connections. For smaller designs, a single air connection and only a single pressure chamber are sufficient.
  • Each pressure chamber can be provided with its own compressed air connection.
  • the pressure chambers can all be acted upon with the same supply pressure. But it is also a different supply possible, for example, supply and outlet areas (where the fibrous web runs to the web guide element and runs) to supply differently.
  • the supply pressure is uniformly distributed over the width (seen in the width direction of the fibrous web or the web guide element).
  • a plurality of side walls may be provided, with which the pressure chamber / pressure chambers are delimited in a zonal manner, so that a zonal cross-profiling, i. Zone-wise other supply pressure is possible.
  • the inner layer may be both an integral part of the supporting body of the web guiding element, as well as itself form the supporting body.
  • the inner layer is made of a pipe or a pipe section. Decisive for the selection is, as just described, the intended degree of wrap around the fibrous web. When looping around 180 °, you would choose about half a pipe cross-section. Accordingly, then the outer layer is to produce in size.
  • the outer, gas-permeable and porous layer is applied to the inner layer by means of thermal spraying or by sintering.
  • This outer layer which may be referred to as a functional layer, has fractions of iron and / or chromium and / or nickel and / or molybdenum and / or aluminum or aluminum alloys or aluminum hydroxide and / or silicon or may also consist of duroplastic-aluminum composite materials consist.
  • the outer layer may be composed of a plurality of homogeneous layers. It may be advantageous if the individual air permeability decreases towards the outside or, the air resistance increases towards the outside. In certain cases, it may also be advantageous if the layer is formed inhomogeneous and their air resistance within the layer continuously increases towards the outside.
  • the layer thickness of the outer layer is in total between 0.5 and 20 mm and the layer thickness of the stability-forming, inner layer is about 5 to 50 mm.
  • the latter dimension depends on how wide the machine is. The wider this is, the thicker the inner layer is to choose.
  • the jacket of the web guiding element can be made machine-wide. But it can also consist only of individual sections, which are applied to a continuous, machine-wide carrier. In this case, the inner layer needs to be less thick.
  • the inner layer of a variety Passages in the form of circular holes or slots has.
  • the flow of the outer layer can be done from below or from the inside and reach the intended pressure drop on the outer surface of the outer layer, for the purpose of a uniform and defined air distribution.
  • the design of the individual passage openings of the inner layer or of the supporting body can be taken from further subclaims.
  • the web guiding element according to the invention is intended for use within a machine for the production and / or finishing of a fibrous web, which should preferably be a paper web.
  • a preferred application site is its arrangement immediately after a coating station for one or both sides of the fibrous web, where the application layer of the freshly coated fibrous web should not be damaged during further operation by the machine and therefore a non-contact guiding and possibly deflecting the web is necessary.
  • the inner layer 4 is stability forming, i. forms a support body or part of a supporting body 6 of the web guiding element 1, wherein the inner layer 4 consists of a tube or a pipe segment and is made of steel.
  • the outer layer 5 which can be labeled as a functional layer, consists of a sprayed or sintered, gas-permeable and porous material. Therefore are proportions of chromium and / or aluminum and / or molybdenum and / or silicon and / or nickel and / or iron or even composites in question. Thus, a functional layer is created which has a sufficiently high hardness and wear resistance.
  • a plurality of pressure chambers 7 here in L-shape (in the example seven chambers are shown) sawtooth incorporated.
  • This shape of the pressure chambers 7 is relatively easy to produce and also allows the symmetrical attachment of each one air pressure port 8.
  • Each chamber is thus provided with an air connection, wherein the pressure chambers 7 are all acted upon by the same supply pressure or with different pressures.
  • the different loading is to be selected when the inlet area 9 (where the fibrous web 3 the Bruleitelement 1 converges) and / or the outlet area 10 (where the fibrous web leaves the guide element 1 in the web running direction L again) to be supplied differently.
  • the layer thickness of the outer layer 5 is in total between 4 to 20 mm, and the layer thickness of the stability-forming, inner layer is about 5 to 50 mm.
  • the inner layer has a plurality of passage openings 13. The corresponding arrangement of these passage openings is shown in hole patterns of Figure 2 in Figures 2a to 21.
  • the passage openings 13 establish the connection between the pressure chambers 7 and the outer layer 5 of the web guiding element 1.
  • the passage openings 13 in the form of circular holes, as shown in Figures 2a and 2b show or in the form of slots, as the figure 2c to 21, manufactured.
  • the passage openings 13 are produced by the laser process. They are introduced as small circular parallel holes with the same distance from each other ( Figure a) or in an offset arrangement and at the same distance ( Figure b).
  • the passage openings 13 are preferred in the form of elongated holes, because they can be produced more easily by means of thermal interrogation methods, such as plasma or flame cutting cost. These may also have the shape of ovals 3.2 and are shown in Figures c) to l) only as short dashes.
  • the passage openings 13 have a maximum width b of 0.2 to 1 mm. The dimensions also apply as the diameter of the circular holes in pictures a) and b).
  • the constant length d of the preferred elongated and approximately in the direction of L aligned passage openings 13, as the pictures c) to l) suggest, is about 5 to 20 mm. In example c) and d) the length is 5mm, in the remaining examples 10mm.
  • the passage openings 13 each have a distance a to each other between less than 5 mm to less than 15 mm. In the example according to Figure a) and b) with small circular holes, the distance a) is only 4mm. In Example c) and g) each 10 mm, in Example d) f) h) i) k) and I) each 14mm, in Example j) 6mm.
  • Figures a) to I) show that the passage openings 13 are arranged in rows R.
  • the individual passage openings 13 can be arranged offset from one another with respect to a neighboring row, as shown in the pictures d), f), g), i), k), j). In this case, intermediate distances between the individual rows R, as shown in Figure d) and f) or no intermediate distances between the individual rows R, as g), or overlaps the ends of the passage openings 13, as shown in Figure j), possible.
  • the rows R of the passage openings 13 have a distance A of about 3 to 18mm to each other.
  • the figures k) and l) are intended to show that it is also possible to align the passage openings 13 at an angle ⁇ to the running direction L of the fibrous web, because thus seen an increase in the effective area of the blow holes 13 by their coverage in the edge regions in the transverse direction Q, is possible and thereby improves the flow of the outer layer 5 and thus the leadership of the fibrous web 3.
  • the angle ⁇ is between 7 ° and 15 °.
  • the web element 1 according to the invention is intended to be able to act directly on a coating device for coating one or both sides of the fibrous web 3.
EP06110145A 2005-04-14 2006-02-20 Elément de guidage d'une bande Withdrawn EP1712501A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510017790 DE102005017790A1 (de) 2005-04-14 2005-04-14 Bahnleitelement

Publications (2)

Publication Number Publication Date
EP1712501A2 true EP1712501A2 (fr) 2006-10-18
EP1712501A3 EP1712501A3 (fr) 2007-10-10

Family

ID=36729234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06110145A Withdrawn EP1712501A3 (fr) 2005-04-14 2006-02-20 Elément de guidage d'une bande

Country Status (2)

Country Link
EP (1) EP1712501A3 (fr)
DE (1) DE102005017790A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269931A3 (fr) * 2009-06-29 2011-08-24 Krones AG Dispositif d'écartement d'une bande de film

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1218801A (en) * 1967-05-12 1971-01-13 Masson Scott Thrissell Eng Ltd Improvements in web guide members
WO1991017943A1 (fr) * 1990-05-11 1991-11-28 Liedtke Rudolph J Coussinet d'air pour materiau en bande
US6722608B1 (en) * 1999-10-28 2004-04-20 Segway Systems, Llc Porous air bearings for tape transports and method of fabrication thereof
EP1479821A2 (fr) * 2003-05-19 2004-11-24 Voith Paper Patent GmbH Dispositif de guidage de bande et/ou dispositif d'étanchéité
DE10322519A1 (de) * 2003-05-19 2004-12-09 Voith Paper Patent Gmbh Bahnführungseinrichtung
EP1502991A1 (fr) * 2003-07-31 2005-02-02 Voith Paper Patent GmbH Dispositif pour guider et sécher une bande fibreuse en mouvement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1218801A (en) * 1967-05-12 1971-01-13 Masson Scott Thrissell Eng Ltd Improvements in web guide members
WO1991017943A1 (fr) * 1990-05-11 1991-11-28 Liedtke Rudolph J Coussinet d'air pour materiau en bande
US6722608B1 (en) * 1999-10-28 2004-04-20 Segway Systems, Llc Porous air bearings for tape transports and method of fabrication thereof
EP1479821A2 (fr) * 2003-05-19 2004-11-24 Voith Paper Patent GmbH Dispositif de guidage de bande et/ou dispositif d'étanchéité
DE10322519A1 (de) * 2003-05-19 2004-12-09 Voith Paper Patent Gmbh Bahnführungseinrichtung
EP1502991A1 (fr) * 2003-07-31 2005-02-02 Voith Paper Patent GmbH Dispositif pour guider et sécher une bande fibreuse en mouvement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269931A3 (fr) * 2009-06-29 2011-08-24 Krones AG Dispositif d'écartement d'une bande de film

Also Published As

Publication number Publication date
EP1712501A3 (fr) 2007-10-10
DE102005017790A1 (de) 2006-10-19

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