EP0665914B1 - Doppelsieb-blattbildner - Google Patents

Doppelsieb-blattbildner Download PDF

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Publication number
EP0665914B1
EP0665914B1 EP94926209A EP94926209A EP0665914B1 EP 0665914 B1 EP0665914 B1 EP 0665914B1 EP 94926209 A EP94926209 A EP 94926209A EP 94926209 A EP94926209 A EP 94926209A EP 0665914 B1 EP0665914 B1 EP 0665914B1
Authority
EP
European Patent Office
Prior art keywords
wire
roller
screen
sieve
pct
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.)
Expired - Lifetime
Application number
EP94926209A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0665914A1 (de
Inventor
Gerhard Kotitschke
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0665914A1 publication Critical patent/EP0665914A1/de
Application granted granted Critical
Publication of EP0665914B1 publication Critical patent/EP0665914B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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 twin-wire sheet former Paper machine for producing a paper web between two sandwiched seven.
  • Sheet formers are according to the preamble of claim 1 known. Reference is made to EP-A-0 438 681 and G 92 01 722.3.
  • twin-wire sheet formers Disadvantage of the known twin-wire sheet formers is that they for a conversion of existing fourdrinier sieves etc. because of her Height and a too large conversion effort poorly suited are.
  • the object of the invention is twin-wire sheet formers to represent the disadvantage of the prior art remove.
  • This task is characterized by the characteristics of the Claim 1 solved.
  • a twin wire forming part of a paper machine starts with a forming roller in the bottom wire and one Solid jacket roller in the top wire.
  • the forming roller can be vacuumed or be vacuumed. Both rollers together form one Gap.
  • the top and bottom sieves loop around the Forming roller in an arc between 30 to 65 °.
  • a machine-wide suspension jet sprayed into the Breast roll and the forming roll gap formed and is due to screen printing and vacuum through both screens partially drained. It will be two evenly formed outer layers. That through the outer sieve escaping water is carried through a jet guide channel Supporting vacuum drained into a gutter. After The forming roller makes both screens almost horizontal continued.
  • the further sheet formation takes place in a turbulence zone, which is formed by a vacuum box with individual Last and a formation box in the bottom wire.
  • a vacuum box with individual Last and a formation box in the bottom wire is formed by a vacuum box with individual Last and a formation box in the bottom wire.
  • a formation box is single, pneumatic adjustable formation bars equipped.
  • the sieves are separated in a known manner a curved suction cup.
  • the bottom wire after the Separating suction device is like a fourdrinier with flat suction device, Sieve suction roller and sieve drive roller.
  • a basic common feature of all proposed Sheet former is an essentially horizontal arrangement the sheet formation zone, making it appear in its Form is particularly suitable for existing fourdrinier screens replace, or an existing fourdrinier in one Rebuild twin wire former.
  • FIGS Figures 1 - 5 Exemplary embodiments are shown in FIGS Figures 1 - 5 shown.
  • Figure 1 shows a converted to the twin-wire sheet former Fourdrinier sieve with the lower circulating sieve 2 and the one above sieve arranged horizontally at the top 1.
  • the sieve 1 is deflected over several guide rollers and into one first breast roll 3 out, which at an angle of 45 ° to the left above that designed as a forming roller first incoming roller 4 of the lower wire 2 lies.
  • the Stock suspension through the headbox between the sieves 1 and 2 injected.
  • a first one Dewatering shoe 6 arranged on the side of the screen 2, which has a slight curvature corresponding to the roller 4.
  • a double one Drainage unit 7.1 and 7.2 arranged, e.g.
  • the drainage unit 7.2 a suction box with a variety of rigid strips 7.4 which are on the side of sieve 1.
  • the drainage unit 7.1 arranged with a variety of Drainage strips 7.3 is equipped, which is offset too the opposite strips 7.4 of the unit 7.2 are arranged.
  • flexible elements e.g. Springs or pneumatic pressure pad (as schematic are indicated
  • the radius of curvature at the center of the Sieving units 7.2 and 7.1 are on the other side of the Sieves with respect to the radius of curvature of the sieve unit 6.
  • the Screening unit 7.1, 7.2 follows one again oppositely curved separation unit in the form of a vacuumed shoe attached to the side of the sieve 2.
  • the screen 1 will move away from the web in the area of the shoe 8 separating, via a deflecting roller 11 via further Deflection rollers leading to the first roller 3 of this wire loop returned.
  • Separating shoe 8 On the side of sieve 2 there are Separating shoe 8 follows, for example, two flat suction cups 9 attached that a further drainage of the fibrous web effect and the screen to a further suction roller 10th lead from where the sieve 2 in turn over several Deflecting rollers is guided back to the first forming roller 4, while the fiber web is directly on or after the roller 10 is removed.
  • FIG. 2 shows a twin-wire sheet former similar to FIG. 1, with the initial phase from the headbox to to the drainage unit 7.1 and 7.2 basically the same is, except for the fact that the drainage unit 7.2 and 7.1 has no curvature.
  • the drainage unit 7.2 then follows on the same side of the screen Suction guide roller 12, over which the twin wire upwards is distracted, then on the opposite Page the screen separator 8 in the form of a curved Suction shoe on which the sieves separate, the sieve 1 again deflected upwards via a deflection roller 11 is, while the screen 2 together with the formed Fiber web is transferred to a further suction roll 10, from where the screen 2 in turn over several deflecting rollers is guided back to the roller 4 and the fiber web previously from Sieve 2 is removed.
  • Figure 3 shows a twin-wire sheet former with a first overhead sieve 1 and a second bottom lying sieve 2. Both sieves form a sieve gap, whereby the screen 1 via a guide roller 3 in the horizontal Direction is deflected while the sieve 2 over a Forming roller, which is designed as a suction roller, the screen 2 redirected into the horizontal. In the screen gap is from one Headbox 5 the stock suspension between the sieves 1 and 2 injected.
  • the Curvature runs counter to the curvature of the roller 4, which in the sieve loop of sieve 1 Drainage element 7.2 with fixed Drainage strips are formed and vacuum is sucked off while the opposite Drainage element 7.1 with at least partially elastic suspended drainage elements is provided.
  • Figure 4 shows a twin-wire sheet former in the Initial phase of Figure 3 corresponds, but takes place Sieve separation using the separator 8 directly in the Connection to double-sided drainage via the Drainage device 7.2 and 7.1 instead.
  • the sieve 1 will after separation again over the roller 11 and others Deflection rollers back to the inlet roller 3, while the Sieve 2 with the fiber web lying on it horizontally is continued and via several suction boxes 15 and 9, attached to the side of the screen 2, drained is then deflected again via the suction roll 10 becomes. After the suction roll 10, the fiber web is removed, while the screen 2 back over several guide rollers is guided to the forming roller 4.
  • Figure 5 shows a twin-wire sheet former with a first overhead circulating sieve 1 and a second underlying sieve 2.
  • the sieve 2 is over a breast roll 4 coming from below into the horizontal transferred while the sieve 1 coming from above over a Forming roller at the top, designed as a suction roller is directed.
  • the forming roller 3 forms with the Deflection roller 4 coming screen 2 a screen gap in which through the headbox 5 introduced the stock suspension becomes.
  • a curved forming shoe 6 is arranged, its curvature opposite to the forming roller 3 is trained.
  • the following drainage elements 7.2, 7.1, etc. correspond to the embodiment in FIG. 1.

Landscapes

  • Paper (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Laminated Bodies (AREA)
  • Sheet Holders (AREA)
  • Package Frames And Binding Bands (AREA)
  • Making Paper Articles (AREA)
EP94926209A 1993-08-20 1994-08-18 Doppelsieb-blattbildner Expired - Lifetime EP0665914B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4328024A DE4328024A1 (de) 1993-08-20 1993-08-20 Doppelsieb-Blattbildner
DE4328024 1993-08-20
PCT/EP1994/002752 WO1995006162A1 (de) 1993-08-20 1994-08-18 Doppelsieb-blattbildner

Publications (2)

Publication Number Publication Date
EP0665914A1 EP0665914A1 (de) 1995-08-09
EP0665914B1 true EP0665914B1 (de) 1998-07-29

Family

ID=6495627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94926209A Expired - Lifetime EP0665914B1 (de) 1993-08-20 1994-08-18 Doppelsieb-blattbildner

Country Status (8)

Country Link
US (1) US5914009A (fi)
EP (1) EP0665914B1 (fi)
JP (1) JPH08502793A (fi)
AT (1) ATE169072T1 (fi)
CA (1) CA2147381A1 (fi)
DE (2) DE4328024A1 (fi)
FI (1) FI951862A (fi)
WO (1) WO1995006162A1 (fi)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343914A1 (de) * 2003-09-19 2005-05-04 Voith Paper Patent Gmbh Entwässerungseinrichtung eines Doppelsiebformers einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI953984A (fi) * 1995-08-24 1997-02-25 Valmet Corp Paperikoneen rainanmuodostusosa
DE19733318A1 (de) * 1997-08-01 1999-02-04 Voith Sulzer Papiermasch Gmbh Doppelsiebformer
AT405538B (de) 1997-11-28 1999-09-27 Andritz Patentverwaltung Vorrichtung zum entwässern einer faserstoffbahn
DE19828237A1 (de) * 1998-06-25 1999-12-30 Voith Sulzer Papiertech Patent Doppelsiebformer
JP2004510898A (ja) * 2000-10-16 2004-04-08 ヴァン　エッセン、ロイ 活性を調節できる脱水ボックス
DE10106731A1 (de) * 2001-02-14 2002-08-22 Voith Paper Patent Gmbh Doppelsiebformer zur Herstellung einer Faserstoffbahn aus einer Faserstoffsuspension
EP1543194B1 (en) * 2002-08-23 2017-12-27 Valmet Technologies, Inc. Forming of a paper or board web in a twin-wire former
AT412098B (de) * 2002-11-11 2004-09-27 Andritz Ag Maschf Vorrichtung zur trennung einer papierbahn von einem sieb
DE10255471A1 (de) * 2002-11-28 2004-07-22 Voith Paper Patent Gmbh Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren
FI116628B (fi) * 2004-02-13 2006-01-13 Metso Paper Inc Monikerrosrainan muodostusosa
FI116688B (fi) * 2004-02-13 2006-01-31 Metso Paper Inc Monikerrosrainan muodostusosa
DE102005003531A1 (de) * 2005-01-25 2006-08-03 Voith Paper Patent Gmbh Doppelsiebformer und Verfahren zur Herstellung einer Faserstoffbahn aus mindestens einer Faserstoffsuspension
DE102011078238A1 (de) 2011-06-28 2013-01-03 Voith Patent Gmbh Entwässerungsvorrichtung für eine Maschine zur Herstellung einer Faserstoffbahn aus wenigstens einer Faserstoffsuspension

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI813027L (fi) * 1981-09-29 1983-03-30 Ahlstroem Oy Banformningsfoerfarande och -anordning
US5389206A (en) * 1989-08-22 1995-02-14 J. M. Voith Gmbh Twin wire former
FI83977C (fi) * 1989-11-06 1991-09-25 Valmet Paper Machinery Inc Gapformare i pappersmaskin.
DE4026953C2 (de) * 1990-01-26 1995-11-30 Escher Wyss Gmbh Entwässerungsvorrichtung und Verfahren zur Entwässerung an einem Doppelsiebformer
DE4005420C2 (de) * 1990-02-21 1995-06-08 Voith Gmbh J M Doppelsiebformer
DE4019884A1 (de) * 1990-06-22 1992-01-09 Voith Gmbh J M Leiste zur nachgiebigen stuetzung eines siebbandes
FI91788C (fi) * 1990-09-12 1994-08-10 Valmet Paper Machinery Inc Paperikoneen kaksiviirainen rainanmuodostusosa
DE4037017C2 (de) * 1990-11-20 1994-12-08 Escher Wyss Gmbh Naßteil einer Doppelsieb-Papiermaschine
FI93032C (fi) * 1991-03-15 1995-02-10 Valmet Paper Machinery Inc Paperikoneen kaksiviirainen rainanmuodostusosa
DE9105797U1 (fi) * 1991-05-10 1991-07-04 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4212609A1 (de) * 1991-12-17 1993-10-28 Voith Gmbh J M Doppelsiebformer
DE4141607C2 (de) * 1991-12-17 1996-04-25 Voith Gmbh J M Doppelsiebformer
DE9201722U1 (fi) * 1992-02-12 1992-04-23 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4402273C2 (de) * 1994-01-27 1995-11-23 Voith Gmbh J M Papiermaschine zur Herstellung mehrlagiger Papierbahnen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343914A1 (de) * 2003-09-19 2005-05-04 Voith Paper Patent Gmbh Entwässerungseinrichtung eines Doppelsiebformers einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren

Also Published As

Publication number Publication date
CA2147381A1 (en) 1995-03-02
ATE169072T1 (de) 1998-08-15
WO1995006162A1 (de) 1995-03-02
US5914009A (en) 1999-06-22
FI951862A0 (fi) 1995-04-19
DE4328024A1 (de) 1995-02-23
FI951862A (fi) 1995-04-19
DE59406561D1 (de) 1998-09-03
EP0665914A1 (de) 1995-08-09
JPH08502793A (ja) 1996-03-26

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