EP0924337A2 - Rouleau de presse - Google Patents

Rouleau de presse Download PDF

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Publication number
EP0924337A2
EP0924337A2 EP98122860A EP98122860A EP0924337A2 EP 0924337 A2 EP0924337 A2 EP 0924337A2 EP 98122860 A EP98122860 A EP 98122860A EP 98122860 A EP98122860 A EP 98122860A EP 0924337 A2 EP0924337 A2 EP 0924337A2
Authority
EP
European Patent Office
Prior art keywords
coating
press roll
layer
radially outermost
outermost 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.)
Granted
Application number
EP98122860A
Other languages
German (de)
English (en)
Other versions
EP0924337B1 (fr
EP0924337A3 (fr
Inventor
Roman Beyerknecht
Heinz Ribar
Herwig Dr. Bangert
Anton Dr. Bergauer
Christoph Dr. Eisenmenger-Sittner
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
Voith Sulzer Papiertechnik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7852327&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0924337(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voith Paper Patent GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0924337A2 publication Critical patent/EP0924337A2/fr
Publication of EP0924337A3 publication Critical patent/EP0924337A3/fr
Application granted granted Critical
Publication of EP0924337B1 publication Critical patent/EP0924337B1/fr
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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/08—Pressure rolls

Definitions

  • the invention relates to a press roll of a paper machine with a cylindrical Metal body with at least one outer circumference a coating comprising a layer is provided.
  • Such Press roll can, for example, in the press section of the respective paper machine or be provided as a glue press roller.
  • the wet paper web is dewatered at a respective press point, in particular by pressing between two rollers or between a roller and a press shoe.
  • the paper web is usually guided by a felt, which also carries off the squeezed out water.
  • the roller which comes into direct contact with the paper web during the pressing process, has a smooth, hard surface. This roller must now have several properties to enable the production of high quality paper. This should ensure, among other things, that the wet paper is easily detached, which initially sticks to the surface of the roller after pressing. In addition, the roll surface should have the lowest possible tendency to become soiled with components of the paper stock.
  • the wear should be kept as low as possible, which complicates the fact that the roller is generally kept clean by means of a scraper pressed against the surface.
  • the roller should also withstand higher temperatures and higher line loads in the press nip. Stone rolls made from natural granite were previously used as press rolls, which were characterized by excellent sheet release properties and a low tendency to occupy. Due to the use of ever larger and faster paper machines and due to the increased use of steam blow boxes, however, problems arose in connection with such stone rollers. In addition, larger rollers for modern paper machines are very difficult to obtain. One of the reasons for this is that there are currently only two quarries worldwide in which the granite blocks required for this are quarried. This inevitably entails high costs and long delivery times.
  • the cover consists of a metallic base layer and an outer layer Ceramic layer.
  • the one made by a plasma spraying process outer ceramic layer can be one or more layers.
  • the outer, thinner layer has a lower Porosity as the inner layer.
  • the individual layers are each uniformly trained.
  • the metallic base layer has a coefficient of expansion, which is smaller than that of the metal body.
  • This Base layer can be sprayed like that Plasma metal spraying process can be produced.
  • Corrosion protection film made of stainless steel is provided be. This anti-corrosion film is also after one Spray processes such as the plasma metal spray process.
  • a roller known from WO 91/13204 of the aforementioned Kind is between a uniformly formed single-layer outer ceramic layer and the metal body a single or multi-layer intermediate layer from a mixture of different materials such as metal and Ceramic components provided in which the mixing ratio the components change continuously or stepwise in the radial direction, that the metal content is greatest on the inside and decreases on the outside, making a corresponding adjustment of the coefficient of thermal expansion should be achieved.
  • Both the outer ceramic layer and the Intermediate layers can each be produced by a plasma spraying process be.
  • the aim of the invention is to provide the most inexpensive press roll possible to create the type mentioned above, in which the aforementioned problems are eliminated.
  • the coating is preferably at least partially applied in a spraying process.
  • the variation in chemical composition can, for example through a variation of coating materials introduced into a coating system, a variation of coating parameters and / or a variation of the coating geometry can be achieved.
  • the variation of the structure can, for example, by a variation of coating materials introduced into a coating system, a Variation of coating parameters and / or a variation of the Coating geometry can be achieved.
  • the coating comprises a metallic base layer for corrosion protection, which are applied directly to the cylindrical metal body and is arranged between this and the radially outermost layer.
  • the radially outermost layer of the cover consists of at least one oxide, in particular from the group Al 2 O 3, Cr 2 O 3 , ZrO 2, TiO 2, SiO 2 and / or the like, at least one carbide the group WC, CrC and / or the like, at least one nitride such as in particular TiN and / or the like and / or at least one boride such as in particular TiB 2 and / or the like or a mixture of two or more of these materials.
  • the radially outermost layer of the cover consists of a cermet.
  • the ceramic component of this cermet advantageously comprises at least one oxide from the group Al 2 O 3, Cr 2 O 3 , ZrO 2, TiO 2, SiO 2 and / or the like.
  • the radially outermost layer of the cover can be made of plastic such as in particular PTFE, silicone and / or the like.
  • this Base layer in the radial direction over at least part of its thickness one with regard to their chemical composition and / or their Structure have a continuously changing structure.
  • Press roll has the coating in the radial direction over its entire Thick yourself in terms of their chemical composition and / or their structure continuously changing structure.
  • Figure 1 shows a purely schematic representation of a press roll 10 a Paper machine, for example in a press section of the paper machine or can also be provided as a glue press roller.
  • the press roll 10 has a cylindrical metal body 12 which on its Outer circumference is provided with a coating 14, which in one Spraying process is applied.
  • Figure 2 shows a sectional view of area A of that shown in Figure 1 Press roll 10.
  • the coating in the present case comprises a radially outermost layer 16 and a corrosion protection serving metallic base layer 18, which is directly on the cylindrical metal body 12 applied and between this and the radially outermost Layer 16 is arranged.
  • the coating 14 has at least one in the radial direction R.
  • the radially outermost layer 16 comprises part of its thickness d one with regard to their chemical composition and / or their structure continuously changing structure.
  • At least the radially outermost layer 16 of the coating 14 is thus constructed as a kind of gradient layer.
  • the metallic Base layer 18 such a continuously in the radial direction R. have changing structure.
  • the coating 14 has present embodiment in the radial direction R preferably over their total thickness d is different in terms of their chemical composition and / or their structure continuously changing structure, so that the coating 14 is formed overall as a gradient coating is.
  • the coating 14 including the outermost layer 16 can therefore in particular with regard to the thermal expansion coefficients, the elastic properties and / or the crystal structures a continuous transition can be ensured, whereby unwanted internal tensions are practically excluded.
  • the variation in chemical composition can be caused by a variation of coating materials introduced in a coating system, a variation of coating parameters and / or a variation the coating geometry can be achieved.
  • the variation of the structure can be achieved by a variation of in the coating system introduced coating materials, a variation of coating parameters and / or a variation of the coating geometry can be achieved.
  • the radially outermost layer 16 of the cover serving as a functional layer 14 can consist, for example, of a cermet. In particular, it can also a percentage of plastic such as PTFE, silicone in particular and / or the like.
  • This intermediate layer can differ in terms of its chemical Composition and / or its structure in the radial direction have a continuously or gradually changing structure.

Landscapes

  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Press Drives And Press Lines (AREA)
  • Secondary Cells (AREA)
EP98122860A 1997-12-17 1998-12-02 Rouleau de presse Expired - Lifetime EP0924337B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19756226A DE19756226A1 (de) 1997-12-17 1997-12-17 Preßwalze
DE19756226 1997-12-17

Publications (3)

Publication Number Publication Date
EP0924337A2 true EP0924337A2 (fr) 1999-06-23
EP0924337A3 EP0924337A3 (fr) 2000-04-26
EP0924337B1 EP0924337B1 (fr) 2004-06-23

Family

ID=7852327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98122860A Expired - Lifetime EP0924337B1 (fr) 1997-12-17 1998-12-02 Rouleau de presse

Country Status (3)

Country Link
EP (1) EP0924337B1 (fr)
AT (1) ATE269916T1 (fr)
DE (2) DE19756226A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612329A1 (fr) * 2004-05-21 2006-01-04 Voith Paper Patent GmbH Revêtement de rouleau en matière composite renforcée de fibres
WO2008086896A1 (fr) * 2007-01-19 2008-07-24 Metso Paper, Inc. Rouleau de machine à fabriquer le papier
WO2013151743A1 (fr) * 2012-04-06 2013-10-10 Stowe Woodward Licensco, Llc Couverture de rouleau amphiphobe et/ou hydrophobe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012213783A1 (de) * 2012-08-03 2014-02-06 Voith Patent Gmbh Walze und Verfahren zur Herstellung einer Walze

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI850087A7 (fi) * 1985-01-08 1986-07-09 Valmet Oy Menetelmä ja laite sekä hihnakomponetti paperikoneen puristinnipin puristuspaineen tasaamiseksi.
ATE41455T1 (de) * 1985-04-30 1989-04-15 Yamauchi Corp Presswalze fuer papiermaschinen.
FI84506B (fi) * 1990-02-22 1991-08-30 Tampella Oy Ab Pressvals foer pappermaskin.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612329A1 (fr) * 2004-05-21 2006-01-04 Voith Paper Patent GmbH Revêtement de rouleau en matière composite renforcée de fibres
WO2008086896A1 (fr) * 2007-01-19 2008-07-24 Metso Paper, Inc. Rouleau de machine à fabriquer le papier
WO2013151743A1 (fr) * 2012-04-06 2013-10-10 Stowe Woodward Licensco, Llc Couverture de rouleau amphiphobe et/ou hydrophobe
CN104334795A (zh) * 2012-04-06 2015-02-04 斯托·伍德沃德许可有限责任公司 疏水和/或双疏辊覆盖层
US10563354B2 (en) 2012-04-06 2020-02-18 Stowe Woodward Licensco Llc Hydrophobic and/or amphiphobic roll cover

Also Published As

Publication number Publication date
EP0924337B1 (fr) 2004-06-23
DE59811595D1 (de) 2004-07-29
ATE269916T1 (de) 2004-07-15
EP0924337A3 (fr) 2000-04-26
DE19756226A1 (de) 1999-06-24

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