EP2157234A2 - Procédé de fabrication d'un cylindre de calandre et cylindre de calandre - Google Patents

Procédé de fabrication d'un cylindre de calandre et cylindre de calandre Download PDF

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Publication number
EP2157234A2
EP2157234A2 EP09163887A EP09163887A EP2157234A2 EP 2157234 A2 EP2157234 A2 EP 2157234A2 EP 09163887 A EP09163887 A EP 09163887A EP 09163887 A EP09163887 A EP 09163887A EP 2157234 A2 EP2157234 A2 EP 2157234A2
Authority
EP
European Patent Office
Prior art keywords
layer
further layer
elastic layer
elastic
roll
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Withdrawn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
EP09163887A
Other languages
German (de)
English (en)
Other versions
EP2157234A3 (fr
Inventor
Lothar Dr. Zimmermann
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 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2157234A2 publication Critical patent/EP2157234A2/fr
Publication of EP2157234A3 publication Critical patent/EP2157234A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0233—Soft rolls
    • 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 method for producing a calender roll with a roll core and an elastic layer on the roll core, in which one applies outside of the elastic layer, a further layer.
  • the invention relates to a calender roll with a roll core and an elastic layer on the roll core, wherein on the outside of the elastic layer, a further layer is arranged.
  • a calender roll having an elastic layer on a hard roll core is used in a calender to form a so-called "soft" nip.
  • the calender roll having the elastic layer cooperates with a hard calender roll whose surface is significantly harder and less yielding than the surface of the elastic layer.
  • the surface of the elastic layer is usually much rougher than the surface of the hard roll used to form the soft nip. It has therefore been attempted to provide the soft roller, ie the roller with the elastic layer, with an improved surface smoothness.
  • a chromium layer is applied to the outside of the elastic layer Service.
  • the use of such a chromium layer has not been successful because it has led to a mottling or a black satin in the calendering of a paper or board web.
  • the invention has for its object to achieve a high wear resistance of the surface of the roller.
  • This object is achieved in a method of the type mentioned in that applying the further layer by a high-speed flame spraying on the elastic layer.
  • High Velocity Oxy Fuel the material to be applied has a higher temperature and high kinetic energy on the surface of the roll, i. flung on the surface of the elastic layer. The material solidifies on the surface and then forms the further layer. High speed flame spraying makes the surface relatively free, i. E. It is possible to produce a relatively wear-resistant layer, which moreover has the advantage of being relatively smooth, so that the calendering of a web passing through a nip formed by means of the roll is improved.
  • the further layer is formed from a self-fluxing alloy.
  • the self-fluxing alloy first flows into the cavities on the surface of the elastic layer after impact, and then forms a closed layer which provides excellent adhesion to the elastic layer. This creates a very intimate connection between the further layer and the elastic layer, so that the roller can be loaded to a sufficient extent despite the further layer.
  • the elastic layer is cooled during application of the further layer. This is particularly advantageous when the elastic layer of a plastic, such as a synthetic resin, such as epoxy, is formed. Cooling prevents the hot material of the further layer from destroying or adversely affecting the elastic layer during application.
  • Carbon dioxide only cools, but will otherwise have no negative impact on the elastic layer or on the material of the further layer.
  • the thickness of the further layer is preferably set to a maximum of 50 ⁇ m, in particular to a maximum of 20 ⁇ m and particularly preferably in the range of 3 to 10 ⁇ m.
  • the high-speed flame spraying process makes it possible to form a very thin layer on the surface of the elastic layer, so that the elastic properties of the elastic layer are still available for the calendering of a web.
  • a relatively thin further layer it is possible to prevent the matting of a web from producing a mottling, black satin or other damage.
  • the further layer is formed from a nickel-containing substance mixture or a nickel-containing alloy.
  • a high wear resistance can be achieved.
  • a nickel-containing surface it is possible to heat the surface, so that the calendering of the elastic roller contacting side of the web is supported.
  • NiCrBSi nickel and silicon
  • this alloy also contains chromium and boron. It has been found that the further layer can then be obtained with a relatively high forehead peel strength and a high compressive strength.
  • the material of the further layer is applied to the elastic layer at a maximum temperature of 2,000 ° C. and / or at a maximum speed of 650 m / s.
  • a maximum temperature of 2,000 ° C. and / or at a maximum speed of 650 m / s it is achieved that the further layer holds on the elastic layer with sufficient strength.
  • the elastic layer if necessary with cooling, does not suffer from the application of the further layer.
  • the object is achieved in a calender roll of the type mentioned above in that the further layer has a maximum thickness of 50 microns, in particular at most 20 microns and more preferably in the range of 3 to 10 microns.
  • the further layer comprises nickel.
  • nickel gives excellent values in terms of wear resistance.
  • a layer comprising nickel can also be made relatively smooth.
  • the further layer comprises silicon.
  • a combination of nickel and silicon has proven to be particularly advantageous.
  • the further layer comprises chromium and / or boron. With such an alloy, excellent wear resistance values and smoothness values can be achieved.
  • the Fig. 1 and 3 show a calender roll 1 with a roll core 2, which carries an elastic layer 3.
  • the elastic layer is constructed in a conventional manner, for example of a material “Toptech”, ie an epoxy resin.
  • a further layer 4 is applied externally.
  • a spray gun 5 is used which applies the material of the further layer 4 to the calender roll 1 with a high-speed flame jet or spray jet 6.
  • the elastic layer 3 is thereby cooled simultaneously, for example with carbon dioxide (CO 2 ).
  • the spray gun 5 has an output 7 for the spray jet 6.
  • the spray jet 6 is produced by the material, from which the further layer 4 is formed, in the form of a mixture 8 of powder of the further layer 4 and carrier gas into the spray gun 5 is introduced.
  • oxygen 9, fuel gas 10 and compressed air 11 are introduced into the spray gun 5.
  • Cooling water 13 is supplied via a cooling water connection 12.
  • the spray jet 6 has a maximum temperature of 2,000 ° C and a maximum speed of 650 m / s.
  • the material of the further layer 4 strikes the surface of the elastic layer 3. There, the material first flows into the cavities on the surface of the elastic layer 3 and then forms a closed layer which has excellent adhesion to the material of the elastic layer 3 contains.
  • the material of the elastic layer for example an epoxide, is cooled, for example by CO 2 .
  • the further layer 4 thereby obtains a relatively high adhesive strength on the elastic layer 3. It was possible to measure a force of 33 MPa in a face pull test. At a pressure load of a specimen with a tension of 230 MPa, no visible cracks occurred at least on the surface.
  • the further layer 4 is relatively thin. Their thickness is a maximum of 50 ⁇ m. In general, it should not exceed 20 microns and particularly preferred values are in the range of 3 to 10 microns.
  • the elastic properties of the elastic layer 3 on the surface of the calender roll 1 remain virtually complete so that the calender roll 1 behaves like a normal soft roll.
  • the surface of this soft roller is much more resistant to wear and also much smoother.
  • the surface can be tempered better due to the additional layer.
  • a dirt-repellent effect can be achieved and the tendency for sticky formation can be reduced.
  • nickel-containing materials As an excellent material for the high-speed flame spraying process for coating a calender roll 1, nickel-containing materials have been found to be useful, especially those containing silicon.
  • a particularly suitable material is NiCrBSi.

Landscapes

  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP09163887.4A 2008-08-16 2009-06-26 Procédé de fabrication d'un cylindre de calandre et cylindre de calandre Withdrawn EP2157234A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810037999 DE102008037999A1 (de) 2008-08-16 2008-08-16 Verfahren zum Herstellen einer Kalanderwalze und Kalanderwalze

Publications (2)

Publication Number Publication Date
EP2157234A2 true EP2157234A2 (fr) 2010-02-24
EP2157234A3 EP2157234A3 (fr) 2013-10-30

Family

ID=41078306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09163887.4A Withdrawn EP2157234A3 (fr) 2008-08-16 2009-06-26 Procédé de fabrication d'un cylindre de calandre et cylindre de calandre

Country Status (2)

Country Link
EP (1) EP2157234A3 (fr)
DE (1) DE102008037999A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2381033A1 (fr) * 2010-04-26 2011-10-26 Voith Patent GmbH Procédé d'augmentation de la qualité d'une machine à papier
WO2011151234A1 (fr) * 2010-06-02 2011-12-08 Voith Patent Gmbh Procédé pour produire une bande de matière fibreuse multicouche revêtue
WO2011157639A1 (fr) * 2010-06-15 2011-12-22 Voith Patent Gmbh Procédé de fabrication d'une bande de matière fibreuse couchée
DE102011006019A1 (de) 2011-03-24 2012-09-27 Voith Patent Gmbh Verfahren zum Herstellen einer Walze und Walze
DE102011081231A1 (de) 2011-08-19 2013-02-21 Voith Patent Gmbh Kalander
EP2573260A1 (fr) * 2011-09-20 2013-03-27 Dirk Richter Rouleau et procédé de revêtement de rouleau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008044369A1 (de) 2008-12-05 2010-06-10 Voith Patent Gmbh Kalander

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5176940A (en) * 1989-02-28 1993-01-05 Valmet Paper Machinery Inc. Method for forming a coated roll
WO2008086896A1 (fr) * 2007-01-19 2008-07-24 Metso Paper, Inc. Rouleau de machine à fabriquer le papier

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2381033A1 (fr) * 2010-04-26 2011-10-26 Voith Patent GmbH Procédé d'augmentation de la qualité d'une machine à papier
WO2011151234A1 (fr) * 2010-06-02 2011-12-08 Voith Patent Gmbh Procédé pour produire une bande de matière fibreuse multicouche revêtue
WO2011157639A1 (fr) * 2010-06-15 2011-12-22 Voith Patent Gmbh Procédé de fabrication d'une bande de matière fibreuse couchée
DE102011006019A1 (de) 2011-03-24 2012-09-27 Voith Patent Gmbh Verfahren zum Herstellen einer Walze und Walze
DE102011081231A1 (de) 2011-08-19 2013-02-21 Voith Patent Gmbh Kalander
EP2573260A1 (fr) * 2011-09-20 2013-03-27 Dirk Richter Rouleau et procédé de revêtement de rouleau

Also Published As

Publication number Publication date
DE102008037999A1 (de) 2010-02-18
EP2157234A3 (fr) 2013-10-30

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