EP1319745A1 - Section de formage à deux toiles - Google Patents

Section de formage à deux toiles Download PDF

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Publication number
EP1319745A1
EP1319745A1 EP02025319A EP02025319A EP1319745A1 EP 1319745 A1 EP1319745 A1 EP 1319745A1 EP 02025319 A EP02025319 A EP 02025319A EP 02025319 A EP02025319 A EP 02025319A EP 1319745 A1 EP1319745 A1 EP 1319745A1
Authority
EP
European Patent Office
Prior art keywords
wire
section according
wire section
forming element
additionally provided
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.)
Ceased
Application number
EP02025319A
Other languages
German (de)
English (en)
Inventor
Christoph Haase
Günter Dr. Halmschlager
Martin Vogt
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 EP1319745A1 publication Critical patent/EP1319745A1/fr
Ceased 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
    • 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 wire section of a machine for producing a fibrous web, in particular paper or cardboard web, with at least one twin wire former, which is a circulating endless inner sieve and a circulating endless Includes outer screen that converge in the region of a first forming element.
  • Screen sections of this type are, for example, in the publications DE 196 51 493 A1, DE 198 03 591 A1 and US 4,925,531.
  • the aim of the invention is to create a wire section of the type mentioned in the introduction, with which an improved sheet structure is guaranteed.
  • a wire section of a machine for the production of a fibrous web, in particular paper or cardboard web with at least one twin wire former, which is a continuous endless inner wire and comprises a continuous endless outer screen, which is in the area of a first Forming element converge in the form of a forming roller, in the direction of wire travel after the first forming element both within the loop of the Outside sieve as well as within the loop of the inner sieve additionally in each case at least one strip element is arranged.
  • This design results in a more even activation on both sides and drainage of the fiber suspension and thus an improved Leaf structure and accordingly a higher leaf quality.
  • At least one of the additionally provided strip elements is advantageous formed by a deflector.
  • a deflector can in particular as Scraper element preferably for water and / or as a formation element Impulse introduction may be provided.
  • Sieve section comprises at least one of the additionally provided strip elements at least one suction element. At least one of these can additionally be provided Last elements can be formed in particular by a suction box.
  • a suction box can, for example, at least essentially have a flat surface. Basically, however, a suction box is also included a curved surface is conceivable.
  • the suction element is preferably with a rising in the wire running direction Vacuum can be applied.
  • Vacuum can be applied.
  • the suction elements can move in the direction of the wire with increasing vacuum be acted upon.
  • At least one is the additionally provided strip elements as slotted transversely to the direction of wire travel Board covering executed.
  • At least one of the additional provided strip elements as perforated and / or herringbone and / or slotted plate covering.
  • At least one of the additionally provided strip elements a combination of individual strips includes.
  • the additionally provided strip elements can alternate, for example inside the loop of the outer sieve and inside the loop of the Inner sieve may be arranged.
  • such an embodiment is also conceivable in which the additional provided strip elements at least partially in pairs opposite, the one strip element of a respective strip element pair inside the loop of the outer wire and the other inside the loop of the inner wire is arranged. It can be advantageous at least a pair of opposite, offset in the direction of wire travel Strip elements can be provided.
  • the sieves are over at least one of the additionally provided strip elements is deflected.
  • the two screens can in particular also be guided over an articulated roller.
  • the wire section can be used to form a single-layer or also to form a multilayer fibrous web to be executed.
  • such an embodiment is also conceivable in which the fiber layer formed by the twin wire former to form a multi-layer Fibrous web with a fed on a base belt or the like Fiber layer is merged.
  • the fiber layers can in particular in the area of a rubber roller.
  • a such a rubber roller is preferably inside the loop of the outer wire of the twin wire former.
  • the inner wire can follow the twin wire zone, for example be an articulated roller.
  • Sieve section is the first forming element through a forming roller with a Outside diameter of about 1600 mm to 1900 mm formed.
  • the first forming element may or may not be vacuumed.
  • the wrap angle is over which the forming roller is wrapped by the two sieves is, preferably in a range of preferably about 75 ° to about 110 °.
  • On the side facing away from the first forming element and / or on the another forming element is preferably on the same side of the twin-wire zone, in particular an external screen suction box or the like.
  • the further forming element can be convexly curved or extend.
  • the other forming element can also be straight or run straight.
  • At least one bar is preferred can be adjusted to spring or rigid on the inner sieve during operation.
  • the job can for example be pneumatic, hydraulic, mechanical and / or take place electromechanically, with control being possible in principle. It is advantageous if at least one bar is rigid, that is, during operation not adjustable, is executed.
  • Sieve section is provided with two strips arranged one behind the other in the running direction of the sieve, the first of which is adjustable against the inner sieve and the second rigid executed or vice versa.
  • a first of the additionally provided strip elements can be in particular on the side of the twin-wire zone facing the first forming element be, in the wire running direction preferably over the other Forming element is offset. Otherwise, inside the loop of the inner wire and / or the loop of the outer screen in any combination in particular again such drainage or forming elements are provided be like them for example. described in the publications mentioned at the beginning are.
  • a second of the additionally provided strip elements is advantageous on the side of the twin-wire zone facing the further forming element arranged, it being in the wire running direction of preferably opposite first strip element is offset.
  • Figure 1 shows a schematic partial representation of an exemplary first embodiment a wire section of a machine for producing a fibrous web, which is, in particular, a paper or cardboard web can.
  • the wire section can therefore in particular be part of a paper machine.
  • the wire section comprises a twin wire former 10 with a rotating one endless inner sieve 14 and a continuous endless outer sieve 12, in the area of a first forming element formed by a forming roller 16 converge to form a suspension inlet gap 18.
  • the Fibrous suspension is introduced into the inlet gap 18 via a headbox 20.
  • the outer screen 12 is above a breast roller 22 guided.
  • a forming element 26 is arranged, which is, for example, a External screen suction box or the like can act.
  • At least one of the two strips 28, 30 is preferably on the inner sieve 14 adjustable. In the present case, this is considered in the direction L of the wire first bar 28 adjustable and the second bar 30 rigid.
  • the job the respective bar can be pneumatic, for example.
  • the additionally provided strip elements 32, 34 can, for example, each by a deflector or a suction element such as a suction box be educated.
  • the respective suction box can be at least essentially have a flat surface or a curved surface.
  • a respective one Suction element can, for example, with a rising in the wire running direction Vacuum can be applied.
  • the additionally provided strip elements 32, 34 can, for example, also as slotted slabs at right angles to the wire running direction or as perforated or herringbone plate coverings. For example, it is also one Combination of individual strips possible.
  • the arrangement can alternate and / or opposite, preferably offset, his.
  • the elements can preferably be immersed in the sieves.
  • the Sieves can also be redirected using the power elements.
  • the first strip element 32 is present Fall within the loop of the inner wire 14 in the wire running direction L arranged behind the forming element 26.
  • the second strip element 34 is inside the loop of the outer wire 12 in the wire running direction L behind the first Strip element 32 is provided. Following the second strip element 34 the two screens 12, 14 are guided over an articulated roller 36.
  • the forming roller 16 can, for example, have an outside diameter of approximately Own 1760 mm.
  • the forming roller 16 can start at a machine speed of approximately 800 m / min optionally vacuumed. From a machine speed of about The forming roller 16 must be vacuumed at 1000 m / min (for example at 0.1 bar).
  • the wrap angle over which the forming roller 16 of the two screens 12, 14 is wrapped, is preferably in a range of about 75 ° to about 110 °.
  • the one arranged on the opposite side of the twin wire zone 24 Forming element 26 can be, for example, an outer or upper screen suction box act.
  • a first part of this forming element 26 can, for example comprise nine strips and have a radius of about 2000 mm.
  • a second part of this forming element 26 can be thirteen, for example Include strips and have a radius of about 5000 mm, for example.
  • a vacuum can be created at 0.15 bar, for example.
  • the two can in the area of this forming element 26 Press strips 28, 30 onto the inner sieve 14.
  • the first bar 28 for example, pneumatically adjustable, while the second bar 30 is rigid.
  • the first is additional in the present case provided strip element 32 on the first forming element 16 facing Side of the twin wire zone 24 is arranged, it in the wire running direction L is preferably offset from the other forming element 26.
  • the second additionally provided strip element 34 is on in the present case the side of the twin-wire zone 24 facing the further forming element 26 arranged, it being in the wire running direction L, for example, with respect to the first Last element 32 is offset.
  • the first strip element 32 can have a radius of approximately 10,000, for example mm and have a vacuum applied at, for example, about 0.15 bar his.
  • the length of the covering can be, for example, approximately 400 mm.
  • a SW drip pan can also be used 44 may be provided.
  • the second additionally provided strip element 34 can also be used, for example again have a radius of about 10000 mm and with a vacuum at, for example about 0.15 bar. In this case too, the length of the covering can be changed for example again be about 400 mm.
  • the embodiment shown in Figure 2 differs from that of Figure 1 essentially in that that formed by the twin wire former 10 Fibrous layer to form a multi-layer fibrous web with a a fibrous layer fed to a base band 42 or the like becomes.
  • the fiber layers are in the area of a rubber roller 38 merged, which in the present case in the loop of the outer screen 12 of the twin wire former 10 is arranged.
  • the outer wire 12 and the relevant fiber layer separate inner sieve 14 via a deflection or Articulated roller 40 performed.
  • this embodiment can, for example, at least essentially again have the same structure as that of Figure 1. Corresponding to each other Parts are assigned the same reference symbols.

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  • Paper (AREA)
EP02025319A 2001-12-12 2002-11-13 Section de formage à deux toiles Ceased EP1319745A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10161056 2001-12-12
DE10161056A DE10161056A1 (de) 2001-12-12 2001-12-12 Siebpartie

Publications (1)

Publication Number Publication Date
EP1319745A1 true EP1319745A1 (fr) 2003-06-18

Family

ID=7708949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02025319A Ceased EP1319745A1 (fr) 2001-12-12 2002-11-13 Section de formage à deux toiles

Country Status (3)

Country Link
US (1) US7008511B2 (fr)
EP (1) EP1319745A1 (fr)
DE (1) DE10161056A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1683913A1 (fr) * 2005-01-25 2006-07-26 Voith Paper Patent GmbH Section de formage à deux toiles
EP1697582A1 (fr) * 2003-12-22 2006-09-06 AstenJohnson, Inc. Section de formage de type a intervalle pour machine a fabriquer le papier a tissu double

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2020112320A (ru) * 2017-09-01 2021-10-01 Стора Энсо Ойй Способ изготовления картона, а также картона и гофрированного картона

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4790909A (en) * 1986-12-17 1988-12-13 Beloit Corporation Two-wire paper forming apparatus
US4925531A (en) * 1988-05-23 1990-05-15 Valmet Paper Machinery Inc. Twin wire former for a paper machine
EP0454989A1 (fr) * 1990-05-04 1991-11-06 Voith Sulzer Papiermaschinen GmbH Section de formage vertical
EP0520970A1 (fr) * 1991-06-26 1992-12-30 Valmet Paper Machinery Inc. Section de formage à double toiles dans une machine à papier
US5788816A (en) * 1995-08-23 1998-08-04 Voith Sulzer Papiermaschinen Gmbh Device for the production of multiple layered paper or cardboard
EP0894894A2 (fr) * 1997-08-01 1999-02-03 Voith Sulzer Papiermaschinen Gesellschaft mbH Procédé et dispositif pour la formation d'une bande de papier
US5972168A (en) * 1989-08-22 1999-10-26 Voith Sulzer Papiertechnik Patent Gmbh Twin wire former
US6159341A (en) * 1996-12-11 2000-12-12 Voith Sulzer Papiermaschinen Gmbh Wire part for forming a multi-ply fiber web
US6267846B1 (en) * 1998-01-30 2001-07-31 Voith Sulzer Papiertechnik Patent Gmbh Twin wire former and method of manufacturing a fibrous material web from a fibrous suspension using same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5248392A (en) * 1990-07-30 1993-09-28 Mitsubishi Jukogyo Kabushiki Kaisha Sheet-forming apparatus for a twin wire paper machine with positive pulse shoe blades
FI91788C (fi) * 1990-09-12 1994-08-10 Valmet Paper Machinery Inc Paperikoneen kaksiviirainen rainanmuodostusosa
US5201999A (en) * 1991-06-10 1993-04-13 Beloit Technologies, Inc. Twin wire forming apparatus
JP3244911B2 (ja) * 1994-01-28 2002-01-07 三菱重工業株式会社 抄紙機のツインワイヤフォーマ
US5798024A (en) * 1996-06-11 1998-08-25 Valmet Corporation Controlling web anistropy in a roll and blade twin-wire gap former
FI111470B (fi) * 1997-04-02 2003-07-31 Metso Paper Inc Menetelmä ja laite veden poistamiseksi paperi- tai kartonkirainasta sekä rainan viemiseksi puristinosaan
DE19949354A1 (de) * 1999-10-13 2001-04-19 Voith Paper Patent Gmbh Mehrlagengapformer
DE10106731A1 (de) * 2001-02-14 2002-08-22 Voith Paper Patent Gmbh Doppelsiebformer zur Herstellung einer Faserstoffbahn aus einer Faserstoffsuspension

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4790909A (en) * 1986-12-17 1988-12-13 Beloit Corporation Two-wire paper forming apparatus
US4925531A (en) * 1988-05-23 1990-05-15 Valmet Paper Machinery Inc. Twin wire former for a paper machine
US5972168A (en) * 1989-08-22 1999-10-26 Voith Sulzer Papiertechnik Patent Gmbh Twin wire former
EP0454989A1 (fr) * 1990-05-04 1991-11-06 Voith Sulzer Papiermaschinen GmbH Section de formage vertical
EP0520970A1 (fr) * 1991-06-26 1992-12-30 Valmet Paper Machinery Inc. Section de formage à double toiles dans une machine à papier
US5788816A (en) * 1995-08-23 1998-08-04 Voith Sulzer Papiermaschinen Gmbh Device for the production of multiple layered paper or cardboard
US6159341A (en) * 1996-12-11 2000-12-12 Voith Sulzer Papiermaschinen Gmbh Wire part for forming a multi-ply fiber web
EP0894894A2 (fr) * 1997-08-01 1999-02-03 Voith Sulzer Papiermaschinen Gesellschaft mbH Procédé et dispositif pour la formation d'une bande de papier
US6267846B1 (en) * 1998-01-30 2001-07-31 Voith Sulzer Papiertechnik Patent Gmbh Twin wire former and method of manufacturing a fibrous material web from a fibrous suspension using same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1697582A1 (fr) * 2003-12-22 2006-09-06 AstenJohnson, Inc. Section de formage de type a intervalle pour machine a fabriquer le papier a tissu double
EP1697582A4 (fr) * 2003-12-22 2009-07-29 Astenjohnson Inc Section de formage de type a intervalle pour machine a fabriquer le papier a tissu double
EP1683913A1 (fr) * 2005-01-25 2006-07-26 Voith Paper Patent GmbH Section de formage à deux toiles

Also Published As

Publication number Publication date
US7008511B2 (en) 2006-03-07
US20030106662A1 (en) 2003-06-12
DE10161056A1 (de) 2003-06-26

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