EP1479817A2 - Dispositif pour guider un matériau en bande - Google Patents

Dispositif pour guider un matériau en bande Download PDF

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Publication number
EP1479817A2
EP1479817A2 EP04101976A EP04101976A EP1479817A2 EP 1479817 A2 EP1479817 A2 EP 1479817A2 EP 04101976 A EP04101976 A EP 04101976A EP 04101976 A EP04101976 A EP 04101976A EP 1479817 A2 EP1479817 A2 EP 1479817A2
Authority
EP
European Patent Office
Prior art keywords
guiding device
web
web guiding
guide element
air
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Withdrawn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
EP04101976A
Other languages
German (de)
English (en)
Other versions
EP1479817A3 (fr
Inventor
Werner Schmidtke
Markus Oechsle
Roland Mayer
Peter Kahl
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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1479817A2 publication Critical patent/EP1479817A2/fr
Publication of EP1479817A3 publication Critical patent/EP1479817A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/36—Guiding mechanisms
    • D21F1/38—Pads
    • 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
    • D21F1/36—Guiding mechanisms
    • D21F1/40—Rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices

Definitions

  • the invention relates to a web guiding device with at least a guide element for non-contact web guidance in one of the production and / or treatment of a material web, in particular paper or Cardboard web, serving machine. It also relates to a machine for the production and / or treatment of a material web, in particular Paper or cardboard web, with at least one such web guiding device.
  • the material web has so far been guided via an air turn.
  • the air cushion is usually uneven Print.
  • the web can still do so touch the guide element.
  • omega folds are not a reliable, level and wrinkle-free web guidance guaranteed. So it can be too so-called omega folds come.
  • a corresponding web guide is relatively expensive again. There are large amounts of air and large dimensions required.
  • a so-called air turn mostly has slot nozzles with a mutual slot nozzle spacing of about 20 to about 200 mm and a respective slot width that is greater than 1 mm. If rows of perforated nozzles are provided, the diameter of the perforated nozzle is generally greater than 2 mm.
  • the web distance to the surface is usually greater than 5 mm, whereby it is usually in a range from 7 to 20 mm.
  • the specific volume flow is usually in a range from 1000 to 30000 Nm 3 / h ⁇ m 2 .
  • the invention has for its object an improved web guiding device to create of the type mentioned, in which the previously mentioned disadvantages are eliminated.
  • it is intended for use in paper machines, coating machines, Calenders, slitter-winder etc.
  • the guide element has a guide surface which is at least partially made of air-permeable porous material, which can be acted upon by compressed air the air flowing through this porous material between the Guide surface and the moving material web to form an air cushion.
  • the high pressure loss on the porous material creates a very uniform Air cushion, so the web of material in a relatively small Distance to the surface is reliably performed. This brings in particular a wrinkle-free run with it.
  • the relatively high internal pressure prevents any rail contact to the surface.
  • the web guiding device can therefore in particular be at least one Guide element that is supplied with compressed air and an open Surface, but with a high pressure drop, due to the inside Air is pushed through. It becomes a both temporally and spatially stable, steady air cushion that the web, for example, in a paper machine, a coating machine, a calender, one Roll cutting machine etc. leads without contact to the guide element.
  • the guide element preferably comprises at least one pressure chamber, via compressed air can be applied to the porous material. It can porous material at least partially on a pressure chamber containing carrier provided with air passage openings. However, for example, there are also such designs conceivable in which the porous material at least part of the pressure chamber wall forms.
  • the pressure in the pressure chamber can in particular be greater than 0.5 bar be, wherein it is preferably greater than 1 bar.
  • the specific volume flow in the porous material is expediently in a range from about 10 to about 5000 Nm 3 / h ⁇ m 2 .
  • the hole or pore spacing or the distance between the outlet openings of the air-permeable porous material is preferably less than 1 mm.
  • the porous material is especially designed so that no single rays, but instead creates a very even air cushion is, which ensures a very good web guidance, in particular contact-free even in the case of holes, tears or strings remains.
  • Web guiding device is the average size of the outlet openings, Pores and / or holes of the porous material smaller than 0.2 mm and preferably less than 0.1 mm.
  • the porous material is preferably selected so that there is a high pressure loss from the inside to the surroundings, creating a very even Air cushion is generated.
  • the web guiding device according to the invention is the Pressure loss in particular from that facing away from the moving material web Side to the side of the porous material facing the material web greater than 0.2 bar and preferably greater than 0.8 bar.
  • the thickness of the between the guide surface and the moving material web formed air cushion and thus the path distance to the surface expediently less than 5 mm and preferably less than 3 mm.
  • the guide element can in particular be designed as a roller. there can be used as a standing or non-rotating roller or as a rotating, preferably be driven roller.
  • the air cushion is advantageously only produced on part of the circumference of the roller.
  • the roller may have a diameter in a range of have about 50 mm to about 1500 mm.
  • the guide element is only wrapped in the material web.
  • the guide element except for the Material web also from at least one moving belt, in particular is wrapped around a sieve belt.
  • the material web or the moving belt can be the guide element, for example according to a wrap angle, the Range is from about 5 to about 260 °.
  • the guide element as an arc segment is executed. It can be in the machine direction constant radius of curvature or in the machine direction have changing radius of curvature. In the latter case, the guide element a continuously changing in the machine direction Radius of curvature or a discrete in the machine direction Have step-changing radius of curvature.
  • the guide element or its Guide surface in particular also a curve curved in the transverse direction have.
  • the radius of curvature of the guide element or of the guide surface change over the width extending in the transverse direction.
  • the guide element is designed as an arc segment, it expediently has it a segment height in a range from about 30 to about 500 mm.
  • the radius of curvature of the guide surface is expediently in one Range from about 5 to about 3000 mm.
  • the web guiding device is the guide element in the transverse direction and / or in the machine direction from several individual segments composed.
  • At least some of the segments can have a common compressed air supply be assigned. However, the segments can also are at least partially supplied by separate compressed air supplies.
  • Web guiding device is over individual separate segments and / or segment groups in the machine direction and / or in the transverse direction a zone-wise separate compressed air supply is provided.
  • a zone-wise separate compressed air supply is provided in the machine direction or cross direction.
  • the web guiding device is the guide surface of the guide element by at least two each made at least partially of air-permeable porous Material existing layers with preferably different Properties formed.
  • the pressure loss on the material web facing inner layer be smaller than on the outer layer.
  • the hole diameter can on the inner layer facing away from the material web be larger than on the outer layer. It is also particularly advantageous if the layers are at least partially made of different materials consist.
  • Another preferred embodiment of the web guiding device according to the invention is characterized by the fact that the material web facing inner layer only in a partial area air-permeable porous material or with air passage openings is provided and is otherwise impermeable to air, so that only An air cushion is generated in a partial area of the guide element.
  • the inner layer facing away from the material web can at least partly consist in particular of metal, GRP and / or CFRP.
  • the inner layer facing away from the material web preferably provides the mechanical load-bearing capacity of the guide element or guide surface.
  • the outermost surface of the guide element facing the material web can consist in particular of fine-porous material. So you can in particular have a finer degree of porosity than the inner one Layer.
  • This outermost surface of the guide element facing the material web can also consist of ceramic material, for example.
  • the outermost surface of the guide element facing the material web is easy to clean, that is to say, for example, consists of an easy-to-clean material.
  • the guide surface of the guide element is provided with air outlet openings which are preferably produced directly when the outermost surface is produced. The air outlet openings in question do not have to be machined into the outermost surface by subsequent processing.
  • the web guiding device according to the invention can especially in a machine for manufacturing and / or treatment a material web, in particular paper or cardboard web, used become.
  • a corresponding web guiding device can therefore for example as a replacement for a conventional paper guide roller after the Press, i.e. in an area still very damp, sensitive web be provided. This has the advantage that the train does not more has to be removed and a drive is no longer required.
  • the guide element can only be wrapped in the material web or apart from the material web for example also from at least be wrapped around a sieve belt.
  • the web guiding device can, for example, replace a conventional one Paper guide roller provided with largely dry web his. This also has the advantage that no drive is required is, i.e. not all guide rollers are driven anymore must, but only those that are essential for web tension are.
  • a corresponding web guiding device may be provided at least in front of and / or in a calender .
  • a respective web guiding device can in particular also arranged immediately before or immediately after the calender his.
  • the respective web guiding device can For example, arranged immediately before winding up or unwinding his.
  • a coating machine for example, in a coating machine and / or at least one corresponding one in a slitter Web guiding device may be provided.
  • At least one Corresponding web guiding device as a replacement for a respective one Spreader roller provided.
  • One of the advantages is also if directly before and / or after an air dryer at least one corresponding web guiding device is provided is.
  • directly before and / or after one Impingement dryer in a dryer section and / or in a coating machine or dryer section each have at least one corresponding one Web guiding device may be provided.
  • At least one corresponding one Web guiding device as a support element in a two-row dryer group is provided in free train between the cylinders. You can of course also in several such two-tier dryer groups appropriate web guiding devices can be provided.
  • At least one corresponding web guiding device can advantageously be used be provided, the guide element additionally of at least is wrapped around a sieve belt.
  • the guide element in question is provided as a rotatably mounted roller, then there are also good emergency running properties, even after failure of the pressure supply does not cause friction between the Material web or a moving belt, e.g. Sieve belt and the rotating Roller can come.
  • the pressure loss can the layers increase from the inside out.
  • the porosity can decrease from the inside out.
  • the hole spacing can be from the inside remove to the outside.
  • the hole diameter can also be from the inside remove outside.
  • Figure 1 shows a schematic representation of a first embodiment one of the contactless guiding element 10 serving Web guiding device, in particular in one of the manufacture and / or treatment of a material web, in particular paper or Cardboard web, serving machine can be used.
  • roller Guide element 10 has a guide surface 12, which is made of air-permeable porous Material 14 is made of compressed air from the inside is about the air 16 flowing through the porous material 14th and to form an air cushion 18 for the moving material web.
  • the guide element 10 comprises at least one pressure chamber 20, via which the porous material 14 can be acted upon by compressed air.
  • the guide element 10 can, as shown, for example, the pressure chamber 20 containing, with at least one and preferably several Air passage openings 22 provided support 24 on which the porous material 14 is applied.
  • this is here e.g. drum-shaped carrier 24 in the circumferential direction completely of porous Surround material 14.
  • the wall of the pressure chamber 20 is only over part of its circumference with air passage openings 22 provided so that the air cushion 18 only over part of the circumference of the guide element 10 is generated.
  • the air cushion is expediently 18 generated at least in the area in which the material web is the guide element 10 wraps around.
  • the guide element 10 Due to the roller-shaped design, the guide element 10 has especially in the wrapping area in the machine direction L a radius of curvature.
  • FIG. 2 shows a further embodiment in a schematic cross-sectional illustration of the guide element 10, which here for example in the form of a Arc segment is executed.
  • a pressure chamber 20 that the segment in question is pressurized again so that air 16 flows from the inside out through the porous material 14.
  • the porous material 14 is again on the outside Carrier 24 containing pressure chamber 20 is applied.
  • the wall of the Carrier 24 or the pressure chamber 20 is again with air passage openings 22 provided, via which the porous material 14 from the inside Compressed air is applied.
  • the guide element 10 or the guide surface 12 in the present case again in the machine direction L curved.
  • the radius of curvature over the wrapping area for example constant.
  • FIG. 3 shows a further embodiment in a schematic longitudinal sectional illustration of the guide element 10.
  • the guide element 10 or its pressure chamber in the transverse direction in at least two zones or Segments 20 ', 20 "divided over which the porous material 14 in the transverse direction if necessary, compressed air can be applied separately.
  • the zones 20 ', 20 are at least temporarily with applied the same pressure.
  • Figure 4 shows the same guide element 10 in a phase in which the zones or segments 20 ', 20 "are straight be pressurized with different pressure.
  • the pressure can therefore vary across the width, i.e. can be varied in the transverse direction in the desired manner.
  • the guide element 10 can at least essentially in particular again have such a structure as this in context was described with the other versions. Corresponding to each other Parts are assigned the same reference symbols.
  • FIG. 5 shows a schematic illustration of a cross-bent, for example, guide element 10 that can be used for wide-area stretching.
  • the guide element again has at least one pressure chamber 20 having carrier 24 on which the porous material 14 is attached and via the pressure chamber 20 of the porous material 14 from the inside is pressurized with compressed air.
  • this embodiment can at least essentially again the same structure as the previously described versions have. Corresponding parts are the same reference numerals assigned.
  • the porous Material 14 each on one provided with air passage openings 22
  • Carrier 24 is attached, in principle, at least a part a support wall or at least part of the wall of the pressure chamber 20 be formed by the porous material 14.
  • Figure 6 shows a schematic representation of immediately after one Press or press section 26 provided guide element 10. It can this guide element in particular be designed again, as is e.g. was described on the basis of the preceding explanations. In the present The case is the guide element 10, for example, only from the material web 28 entwined.
  • Figure 7 shows a schematic representation of another, also again Guide element arranged immediately after a press or press section 26 10. Following this, the first cylinders 30 are a dryer section 32 to recognize, over which the material web 28 finally together is guided with a sieve belt 33.
  • Figure 8 shows a schematic representation of a guide element 10 that immediately behind the last drying cylinder 30 of a single-row dryer group a drying section 32 is arranged.
  • the dry group shown can be provided in particular at the end of the dryer section 32 so that the guide element 10 here e.g. immediately after the dryer section 30 can be provided.
  • the guide element 10 is only of the material web in the present case 28 entwined.
  • the guide element 10 can e.g. have such a structure again, like previously described in connection with Figures 1 to 5 was, i.e. there are again any embodiments of the Guide element 10 according to the invention conceivable.
  • Figure 9 shows a schematic representation of a guide element 10 that immediately after the last drying cylinder 30 of a two-row dryer group a drying section 32 is arranged. Also in the present In the case of the drying group shown, this can in particular happen again the last drying group of the dryer section 32, so that the Guide element 10 again here immediately after the drying section 32 is arranged.
  • the guide element is only from the material web 28 entwined.
  • the guiding element 10 can, in particular, be designed in the same way as this was previously described, for example, with reference to FIGS. 1 to 5, i.e. there are again any embodiments of the invention Guide element 10 conceivable.
  • a guide element 10 1 is arranged after the drying section 32 and before a surface application 33, a guide element 10 2 between the surface application 33 with, for example, an impingement dryer 36 and a guide element 10 3 after the impingement dryer 36.
  • the guide elements 10 can, in particular, be designed again as described above, for example, with reference to FIGS. 1 to 5.
  • FIG. 11 shows a further embodiment in a schematic representation, in the two in a two-tier dryer group 42 of a dryer section 32 arranged guide elements 10 can be seen which, as shown, e.g. each can have the shape of an arch element.
  • FIG. 12 shows a further embodiment in a schematic representation with guide elements provided before, in and after a calender 44 10, which here again have a cylindrical structure, for example.
  • Figure 13 shows a schematic representation of e.g. in front of an impingement dryer 38 arranged guide element 10, which is additionally from a Sieve belt 40 is wrapped, which then together with the material web 28 is passed through the dryer 38.
  • the guide element 10 again has, for example a cylindrical structure. Basically, however, are here again any embodiments of a guide element 10 according to the invention conceivable.

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  • Paper (AREA)
  • Advancing Webs (AREA)
EP04101976A 2003-05-19 2004-05-07 Dispositif pour guider un matériau en bande Withdrawn EP1479817A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003122525 DE10322525A1 (de) 2003-05-19 2003-05-19 Bahnführungseinrichtung
DE10322525 2003-05-19

Publications (2)

Publication Number Publication Date
EP1479817A2 true EP1479817A2 (fr) 2004-11-24
EP1479817A3 EP1479817A3 (fr) 2005-09-07

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EP04101976A Withdrawn EP1479817A3 (fr) 2003-05-19 2004-05-07 Dispositif pour guider un matériau en bande

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EP (1) EP1479817A3 (fr)
DE (1) DE10322525A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2543605A1 (fr) * 2011-07-06 2013-01-09 MULTIVAC Sepp Haggenmüller GmbH & Co KG Dispositif et procédé destinés au chauffage sans contact d'une feuille emboutissable

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004007378B4 (de) * 2004-02-16 2007-03-01 Koenig & Bauer Ag Vorrichtungen zur Beeinflussung der Breite und/oder Lage einer Bahn
CN105987607B (zh) * 2015-02-06 2018-03-09 宝山钢铁股份有限公司 气垫式炉辊、基于该炉辊的位置闭环控制***及其应用

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0364392A2 (fr) * 1988-10-13 1990-04-18 Beloit Corporation Dispositif à barre d'ecartement
DE19651191A1 (de) * 1996-12-10 1998-06-18 Voith Sulzer Papiermasch Gmbh Trockenpartie einer Maschine zur Herstellung einer Materialbahn
US6024266A (en) * 1998-01-16 2000-02-15 International Business Machines Corporation System and method for transporting and clamping flexible film structures
WO2000039011A2 (fr) * 1998-12-23 2000-07-06 Bachofen + Meier Ag Maschinenfabrik Dispositif pour guidage ou traitement sans contact d'une bande de materiau, notamment une bande de papier ou de carton, d'un film metallique ou plastique
DE10133623A1 (de) * 2001-07-13 2003-01-30 Klaus Nendel Vorrichtung zum Führen von kleinen Stückgütern, grobkörnigem Schüttgut geringer Dichte und/oder Flachformgut

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US3216638A (en) * 1962-10-23 1965-11-09 Nat Distillers Chem Corp Air cushion method and apparatus for supporting moving film sheets
WO1991017943A1 (fr) * 1990-05-11 1991-11-28 Liedtke Rudolph J Coussinet d'air pour materiau en bande
DE4409036A1 (de) * 1994-03-17 1995-09-21 Jagenberg Ag Verfahren und Wickelmaschine zum Aufwickeln einer Materialbahn, insbesondere einer Papier- oder Kartonbahn
DE4415581C2 (de) * 1994-05-04 1995-12-07 Voith Gmbh J M Papier-Streichvorrichtung
DE19605904A1 (de) * 1995-02-23 1996-08-29 Basf Magnetics Gmbh Bahnführungswalze für eine Warenbahn, insbesondere eine Folienbahn
DE29508421U1 (de) * 1995-05-20 1995-09-14 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Stationäre Gleitleiste
FI101634B (fi) * 1997-02-28 1998-07-31 Valmet Corp Menetelmä ja laite kalanterissa paperin päänviennissä
DE19902936A1 (de) * 1998-12-23 2000-06-29 Bachofen & Meier Ag Buelach Vorrichtung zum berührungslosen Führen oder Behandeln einer laufenden Materialbahn, insbesondere einer Papier- oder Kartonbahn, Metall- oder Kunststoffolie
DE20008665U1 (de) * 2000-05-13 2000-08-24 ARADEX GmbH, 73547 Lorch Druckmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0364392A2 (fr) * 1988-10-13 1990-04-18 Beloit Corporation Dispositif à barre d'ecartement
DE19651191A1 (de) * 1996-12-10 1998-06-18 Voith Sulzer Papiermasch Gmbh Trockenpartie einer Maschine zur Herstellung einer Materialbahn
US6024266A (en) * 1998-01-16 2000-02-15 International Business Machines Corporation System and method for transporting and clamping flexible film structures
WO2000039011A2 (fr) * 1998-12-23 2000-07-06 Bachofen + Meier Ag Maschinenfabrik Dispositif pour guidage ou traitement sans contact d'une bande de materiau, notamment une bande de papier ou de carton, d'un film metallique ou plastique
DE10133623A1 (de) * 2001-07-13 2003-01-30 Klaus Nendel Vorrichtung zum Führen von kleinen Stückgütern, grobkörnigem Schüttgut geringer Dichte und/oder Flachformgut

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2543605A1 (fr) * 2011-07-06 2013-01-09 MULTIVAC Sepp Haggenmüller GmbH & Co KG Dispositif et procédé destinés au chauffage sans contact d'une feuille emboutissable

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Publication number Publication date
DE10322525A1 (de) 2004-12-09
EP1479817A3 (fr) 2005-09-07

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