WO1991013204A1 - Cylindre de presse pour machine a papier - Google Patents

Cylindre de presse pour machine a papier Download PDF

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Publication number
WO1991013204A1
WO1991013204A1 PCT/FI1991/000056 FI9100056W WO9113204A1 WO 1991013204 A1 WO1991013204 A1 WO 1991013204A1 FI 9100056 W FI9100056 W FI 9100056W WO 9113204 A1 WO9113204 A1 WO 9113204A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder body
intermediate layer
press roll
layer
roll according
Prior art date
Application number
PCT/FI1991/000056
Other languages
English (en)
Inventor
Jukka Kinnunen
Pekka Siitonen
Erkki Kiiski
Pentti Kettunen
Olli-Pekka Sorma
Keijo Ruonala
Original Assignee
Tampella Papertech Oy
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 Tampella Papertech Oy filed Critical Tampella Papertech Oy
Publication of WO1991013204A1 publication Critical patent/WO1991013204A1/fr

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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 in a paper machine, comprising a metallic cylinder body, a ceramic surface layer and an intermediate layer between the cylinder body and the surface layer, said intermediate layer being of a composite material of a metal and a ceramic material.
  • the roll used in a two- or three-nip roll press is generally made of granite.
  • Granite is used as roll material due to its surface properties, as the paper web can be detached from its surface in a very controlled manner, which results in good runnability and keeps the number of breaks on a low level.
  • the granite roll can be ground and polished extremely fine and smooth, which is of importance for fine paper and printing paper in particular.
  • granite resists well the wear effect caused by scraping, which involves long service and main ⁇ tenance intervals.
  • granite is, however, restricted by a number of factors.
  • the running speeds of paper machines have increased and still keep increasing.
  • the compression pressures and temperatures are higher than previously, so that the mechanical and thermal strains imposed on the roll are greater.
  • granite is non-homogenous, so that its material properties and surface prop ⁇ erties are unevenly distributed, on account of which the availability of suitable stone material has be ⁇ come problematic as the roll sizes have increased, with a resultant rise in costs.
  • Due to the strength requirements, the weight of the roll has also in ⁇ creased close to its extremity in view of the treat ⁇ ment and installation of the roll, which has also increased the weight of the frame constructions, which, in turn, involves an increase in the vibration sensitivity of the entire press section.
  • FI Patent Application 861803 in turn, teaches a press roll structure in which a metallic binding layer is attached to the surface of a metallic body, the coefficient of thermal expansion of the binding layer being smaller than that of the metal body; further, a ceramic surface layer is fastened upon the binding layer.
  • This arrangement has proved to have certain disadvantages.
  • polymer- and elastomer-base coatings have proved inferior to granite, as only a few coatings operate satis ⁇ factorily and only with a limited number of paper grades.
  • thermally sprayed coatings paper detaching properties similar to those of granite have been achieved with ceramic coatings only.
  • the adherence of ceramic materials to the basic material and the durability of the coating in long-term use have been problematic.
  • the object of the present invention is to provide a paper machine roll in which the strains caused between the ceramic coating and the body due to their unequal coefficients of thermal expansion are compensated for more efficiently than previously, thus avoiding the above-described problems.
  • Another object of the invention is to improve the corrosion resistance of a roll provided with a ceramic surface layer.
  • a paper machine roll of the invention is characterized in that the intermediate layer is of a composite material formed by a metal and a ceramic material, the mixing ratio of the components of the composite material being different in different por ⁇ tions of the intermediate layer in the radial direction of the roll.
  • Figure 1 is a schematic axial view of a roll of the invention
  • Figure 2 is a schematic enlarged view of a specific structure of a surface layer and an intermediate layer of the roll of the invention, and the attachment of these layers to the metal body of the roll;
  • Figure 3 is a schematic enlarged view of another specific structure of the surface layer and the intermediate layer of the roll of the invention, and the attachment of these layers to the metal body of the roll.
  • Figure 1 shows a roll 1 comprising a metallic cylinder body 2 formed in a manner known per se.
  • the structure and manufacture of the cylinder body are obvious to one skilled in the art and will not be described more closed herein.
  • the cylinder body 2 is surrounded with a surface layer 3 of a suitable ceramic material known per se, such as alumina (AI3O2), titania (Ti0 2 ), mullite (3A1 2 0 3 x 2Si0 2 ) or their mixture or other similar ceramic oxides.
  • alumina AI3O2
  • titania Ti0 2
  • mullite 3A1 2 0 3 x 2Si0 2
  • An intermediate layer 4 compensating for thermal expansions is provided between the surface layer 3 and the cylinder body 2, which layer is made of a mixture of a ceramic material and a metal.
  • the ceramic material may be the same material as that used in the surface layer or a different material, and besides the materials mentioned above, suitable materials include zirconia (Zr0 ), tungsten carbide (WC), chrome carbide (Cr 2 C3) or some other carbide ceramics or their mixture.
  • the metal may be an iron-, chrome-, nickel-, copper-, cobalt- or aluminium-base mixture, such as stainless steel, a nickel/aluminium mixture, or a copper/nickel mixture.
  • the ratio of the metal component to the ceramic component in the intermediate layer 4 is such that the amount of metal is at greatest close to the cylinder body 2 and its proportional amount decreases towards the surface layer 3 while the proportional amount of the ceramic component increases. This can be accomplished either by forming the whole intermediate layer so that its mixing ratio changes continuously, or by forming the intermediate layer of several sublayers having different mixing ratios changing according to the above-mentioned principle.
  • Figure 2 shows schematically on an enlarged scale one specific structure of the surface layer and the intermediate layer of the roll of the invention, and the attachment of these layers to the cylinder body.
  • the intermediate layer 4 formed upon the cylin ⁇ der body 2 is a single integral layer formed by simultaneous feeding of the ceramic and the metal component, e.g., by spraying them thermally on to the surface of the cylinder body 2.
  • the feed ratio of the components is changed as the layer thickness increases, so that the proportion of metal decreases while the proportion of the ceramic material, shown schematically by black dots, in- creases, until the thickness of the intermediate layer 4 and the ratio of the metal to the ceramic material are suitable for the adherence of the ceramic surface layer 3.
  • Figure 3 shows schematically on an enlarged scale another specific structure of the surface layer and the intermediate layer of the roll of the inven ⁇ tion, and the attachment of these layers to the cylinder body.
  • the intermediate layer 4 comprises three separate sublayers 4a, 4b, and 4c. These are formed, e.g., by simultaneously spraying the metal and the ceramic component by a thermal spraying technique on to the surface of the cylinder body 2, whereby the first sublayer 4a is formed with one specific mixing ratio. Thereafter the mixing ratio of the feed materials and possibly also the materials are changed so that the coefficient of thermal expansion changes in a desired direction. Then the layer 4b is sprayed similarly on the surface of the layer 4a, whereafter the mixing ratio and/or the materials are again changed for spraying the . layer 4c. Finally, the roll is coated with the ceramic surface layer 3.
  • the intermediate layer portion or the sublayer 4a closest to the cylinder body 2 is of almost pure metal so that it does not allow the penetration of moisture and thus prevents corrosion at the interface between the intermediate layer 4 and the cylinder body 2.
  • the layer or layer portion closest to the cylinder body has to be of corrosion resistant material, such as stainless steel.
  • the corrosion resistance of the metal of the layers closer to the surface layer need not be equally good, and the metal can be chosen more freely to achieve a suitable co- efficient of thermal expansion.
  • the intermediate layer and the surface layer are preferably formed by thermal spraying methods, such as gas or liquid stabilized plasma spraying, flame spraying, hypersonic flame spraying or detonation spraying.
  • thermal spraying methods such as gas or liquid stabilized plasma spraying, flame spraying, hypersonic flame spraying or detonation spraying.
  • the different layers or layer portions can be made by the same method or by dif ⁇ ferent methods.
  • the metal component of the integral intermediate layer can be formed by one or more metals and the mixing ratio of the metals may change e.g. in proportion to the layer thickness in such a way that the proportional amount of one metal increases in the same proportion as the ceramic material or in a different proportion in accordance with the desired structure and thermal expansion properties of the intermediate layer.
  • the ceramic component may contain one or more ceramic materials and the ratio of the different materials to each other may be constant or it may vary.
  • the metals in the sublayers may be the same or different; similarly, the ceramic material may be any one of the above-mentioned alternative ceramic materials suited for the purpose.
  • the sublayers can be formed similarly as the integral layer so that the mixing ratio changes with the thickness of the sub ⁇ layer in the radial direction of the roll ' to achieve better matching.

Landscapes

  • Paper (AREA)
  • Laminated Bodies (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

On décrit un cylindre de presse (1) d'une machine à papier, comportant un corps métallique cylindrique (2), une couche céramique de surface (3) et une couche intermédiaire (4) entre le corps cylindrique (2) et la couche de surface (3). La couche de surface est réalisée en un mélange contenant un métal ou un mélange de métaux et des composants céramiques. Le rapport des composants du mélange de la couche intermédiaire (4) varie soit en continu soit par paliers dans le sens radial du cylindre de sorte que la proportion de métal présente dans la couche intermédiaire (4) est plus importante près du corps du cylindre (2) et décroît à partir de là dans un sens radial vers l'extérieur. La couche intermédiaire (4) a pour objet d'assurer une variation progressive du coefficient de dilatation thermique entre la matière de base et la matière céramique de surface.
PCT/FI1991/000056 1990-02-22 1991-02-21 Cylindre de presse pour machine a papier WO1991013204A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI900898A FI84506B (fi) 1990-02-22 1990-02-22 Pressvals foer pappermaskin.
FI900898 1990-02-22

Publications (1)

Publication Number Publication Date
WO1991013204A1 true WO1991013204A1 (fr) 1991-09-05

Family

ID=8529925

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1991/000056 WO1991013204A1 (fr) 1990-02-22 1991-02-21 Cylindre de presse pour machine a papier

Country Status (2)

Country Link
FI (1) FI84506B (fr)
WO (1) WO1991013204A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0616073A1 (fr) * 1993-03-10 1994-09-21 Schwäbische Hüttenwerke GmbH Dispositif pour le traitement d'une bande de matériau
US5356506A (en) * 1992-06-12 1994-10-18 The Procter & Gamble Company Modular construction pattern rolls for use in paper converting
EP0870868A2 (fr) * 1997-04-11 1998-10-14 Valmet Corporation Rouleau de pressage à revêtement en céramique adapté à des conditions de corrosion difficiles, méthode pour la fabrication d'un tel rouleau et composition du revêtement
EP0924337A2 (fr) * 1997-12-17 1999-06-23 Voith Sulzer Papiertechnik Patent GmbH Rouleau de presse
US6200248B1 (en) 1997-04-11 2001-03-13 Valmet Corporation Roll for a paper or board machine
KR20010057927A (ko) * 1999-12-23 2001-07-05 신현준 세라믹 코팅층을 갖는 제지용 롤
US6560468B1 (en) 1999-05-10 2003-05-06 Peter V. Boesen Cellular telephone, personal digital assistant, and pager unit with capability of short range radio frequency transmissions
US6609996B2 (en) 1999-02-15 2003-08-26 Metso Paper, Inc. Method for sealing of a coating on a roll
EP1334778A3 (fr) * 2002-02-08 2006-06-28 Fuji Photo Film Co., Ltd. Tige pour dipositif de revêtement ainsi que son procédé de fabrication
US7291248B2 (en) 2001-11-21 2007-11-06 Exel Oyj Dewatering member with a composite body for a paper or board machine and method for manufacturing a dewatering member with a composite body for a paper or board machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169381A (en) * 1985-01-09 1986-07-09 Valmet Oy Synthetic press role for paper machine
EP0207921A1 (fr) * 1985-04-30 1987-01-07 Yamauchi Corporation Rouleau de presse pour machines à papier
EP0341229A2 (fr) * 1988-04-28 1989-11-08 Valmet Paper Machinery Inc. Rouleau dans la section de pressage d'une machine à papier et procédé pour la fabrication du rouleau
SE463466B (sv) * 1985-09-16 1990-11-26 Valmet Paper Machinery Inc Pressvals foer anvaendning i en pappersmaskin samt foerfarande foer tillverkning av en saadan pressvals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169381A (en) * 1985-01-09 1986-07-09 Valmet Oy Synthetic press role for paper machine
EP0207921A1 (fr) * 1985-04-30 1987-01-07 Yamauchi Corporation Rouleau de presse pour machines à papier
SE463466B (sv) * 1985-09-16 1990-11-26 Valmet Paper Machinery Inc Pressvals foer anvaendning i en pappersmaskin samt foerfarande foer tillverkning av en saadan pressvals
EP0341229A2 (fr) * 1988-04-28 1989-11-08 Valmet Paper Machinery Inc. Rouleau dans la section de pressage d'une machine à papier et procédé pour la fabrication du rouleau

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5356506A (en) * 1992-06-12 1994-10-18 The Procter & Gamble Company Modular construction pattern rolls for use in paper converting
EP0616073A1 (fr) * 1993-03-10 1994-09-21 Schwäbische Hüttenwerke GmbH Dispositif pour le traitement d'une bande de matériau
US5967959A (en) * 1997-04-11 1999-10-19 Valmet Corporation Press roll with a ceramic coating, method for manufacturing the same and coating composition
EP0870868A3 (fr) * 1997-04-11 1998-11-25 Valmet Corporation Rouleau de pressage à revêtement en céramique adapté à des conditions de corrosion difficiles, méthode pour la fabrication d'un tel rouleau et composition du revêtement
EP0870868A2 (fr) * 1997-04-11 1998-10-14 Valmet Corporation Rouleau de pressage à revêtement en céramique adapté à des conditions de corrosion difficiles, méthode pour la fabrication d'un tel rouleau et composition du revêtement
US6200248B1 (en) 1997-04-11 2001-03-13 Valmet Corporation Roll for a paper or board machine
EP0924337A2 (fr) * 1997-12-17 1999-06-23 Voith Sulzer Papiertechnik Patent GmbH Rouleau de presse
DE19756226A1 (de) * 1997-12-17 1999-06-24 Voith Sulzer Papiertech Patent Preßwalze
EP0924337A3 (fr) * 1997-12-17 2000-04-26 Voith Sulzer Papiertechnik Patent GmbH Rouleau de presse
US6609996B2 (en) 1999-02-15 2003-08-26 Metso Paper, Inc. Method for sealing of a coating on a roll
US6560468B1 (en) 1999-05-10 2003-05-06 Peter V. Boesen Cellular telephone, personal digital assistant, and pager unit with capability of short range radio frequency transmissions
KR20010057927A (ko) * 1999-12-23 2001-07-05 신현준 세라믹 코팅층을 갖는 제지용 롤
US7291248B2 (en) 2001-11-21 2007-11-06 Exel Oyj Dewatering member with a composite body for a paper or board machine and method for manufacturing a dewatering member with a composite body for a paper or board machine
EP1334778A3 (fr) * 2002-02-08 2006-06-28 Fuji Photo Film Co., Ltd. Tige pour dipositif de revêtement ainsi que son procédé de fabrication

Also Published As

Publication number Publication date
FI900898A0 (fi) 1990-02-22
FI84506B (fi) 1991-08-30
FI900898A (fi) 1991-08-23

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