WO2009106226A1 - Cylindre et procédé de fabrication d'un tel cylindre - Google Patents

Cylindre et procédé de fabrication d'un tel cylindre Download PDF

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Publication number
WO2009106226A1
WO2009106226A1 PCT/EP2009/000899 EP2009000899W WO2009106226A1 WO 2009106226 A1 WO2009106226 A1 WO 2009106226A1 EP 2009000899 W EP2009000899 W EP 2009000899W WO 2009106226 A1 WO2009106226 A1 WO 2009106226A1
Authority
WO
WIPO (PCT)
Prior art keywords
elevations
roller
roll
core
resin
Prior art date
Application number
PCT/EP2009/000899
Other languages
German (de)
English (en)
Inventor
Carsten Sohl
Original Assignee
Schäfer Composites 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 Schäfer Composites GmbH filed Critical Schäfer Composites GmbH
Publication of WO2009106226A1 publication Critical patent/WO2009106226A1/fr

Links

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

Definitions

  • the invention relates to a roller, such as can be used as a calender for paper treatment, and a method for producing such a roller.
  • rollers with a solid core with a cover made of fabric or pulleys, which are machined so as to provide a structure which is circularly symmetrical and consists in the longitudinal direction of the axis of serrations and recesses therebetween ,
  • the invention has for its object to provide an aforementioned roller and a manufacturing method with which problems of the prior art can be avoided and in particular a roller with advantageous properties also in terms of temperature resistance or temperature fluctuations and residual stresses in different layers or coatings after manufacture can be created.
  • the roller has a lining structure with a roller core, which can be very rigid or made of metal.
  • a structure is applied to the roll core, which has alternately arranged elevations and depressions.
  • the structure consists of a material with higher ductility than the material of the roll core or as the material to which the structure is applied directly.
  • an external coating is applied to this structure as a functional coating or surface.
  • the structure has a higher ductility than the covering, so as to compensate for its movement or shrinkage in relation to a steel core, which experiences virtually no movement at all. This ductility is important above all in the longitudinal direction of the roll.
  • the elevations and depressions can alternate in the longitudinal direction of the roller, in particular directly to then each other.
  • this may be a serrated structure.
  • the elevations and depressions may in each case extend in an annular manner around the roll core, wherein overall all the elevations and all depressions are advantageously similar or identical.
  • Elevations and / or depressions are preferably pointed or acute-angled, especially if they are connected directly to one another.
  • the flanks are advantageously formed straight and particularly advantageous they are arranged at an equal angle to the longitudinal axis of the roller or the depressions and / or elevations are symmetrical.
  • such a structure can be as described in the aforementioned DE 102004019306 A1.
  • Width and / or height of the surveys may be a few mm, and advantageously the elevations and / or depressions are higher than wide.
  • the structure or protrusions may be made of resin, for example, epoxy resin.
  • resin for example, epoxy resin.
  • a layer or a covering or cover which consists of composite material with fibers and a Einbett material for the fibers, such as resin.
  • the fibers can be wound onto the structure in the form of rovings.
  • a roll according to the invention For producing a roll according to the invention with the structure, it is possible on the one hand, that the structure or the material for the structure is already applied to a roll core or base, that the shape of the finished structure with the elevations and depressions is present.
  • a further production method according to the invention provides that the material for the structure, for example resin, is applied as a continuous and approximately uniformly thick layer. Subsequently, the material is in the desired or desired for the structure shape - A -
  • a type of stencil can be applied to the negative mold of the finished structure and the stencil and roll are moved in the circumferential direction relative to one another.
  • a template can either produce only one or a few protuberances at the same time.
  • the template extends over a substantial part of the length of the roller or over the entire roller so that the structure can be machined out of the material in one operation by relative rotation as well a well-defined and consistent manufacturing process is ensured.
  • the continuous layer can be applied with a height to the roll core or the substructure, which corresponds to the height of the elevations.
  • the material is taken out of the wells to be created and removed.
  • the continuous layer can be applied to the roll core or substructure with a thickness that is significantly below the height of the elevation, for example slightly more than half as thick.
  • a resin may be applied in gelled form so that it can be reshaped by machining and retaining the shape.
  • a lower glass transition temperature also called Tg, as dieje- have nige of the pad.
  • This glass transition temperature can be determined by the DSC measurement method. It can also be referred to as softening temperature and is generally used as a term, since from this temperature, the stiffness drops sharply. This, in turn, means that in the case of the resin materials used here, the structure softens at a lower temperature than the coating.
  • This glass transition temperature may be in the structure at about 120 0 C or in a range between 110 0 C and 130 ° C.
  • the glass transition temperature for the coating can be chosen significantly higher, for example between 150 0 C and 170 0 C, advantageously at about 160 0 C.
  • the entire roller at about 140 0 C to temper.
  • stresses in the lining can be reduced.
  • the structure at this temperature is already quite soft and once again much ductile, the coating can reduce its internal stresses very well compared to the inner roll core made of steel.
  • the glass transition temperature of the coating should not be achieved, otherwise its shape would be too much affected.
  • FIG. 1 shows various method steps 1 to 4 for producing a roll according to the invention with a first method according to the invention
  • FIG. 2 shows a variation of the second step of the method according to FIG. 1 with a thicker applied epoxy resin layer before structuring
  • Fig. 3 shows a further alternative embodiment of a method according to the invention with application of a finished coat with structures on a roll core.
  • Fig. 1 is shown in a step, as on a roll core 15, which may be of any structure as in conventional rolls, advantageously made of metal, by means of distributed along the roll core 15 nozzles 17 epoxy resin 19 is applied.
  • the core 15 rotates, so that the epoxy resin 19 forms a layer as a result.
  • the layer of epoxy resin 19 does not necessarily have to be completely uniformly thick and smooth on the surface, but it is advantageous.
  • a kind of comb-like template 21 is brought to the still rotating roller core 15 with the still moldable layer of epoxy resin 19.
  • the template 21 has prongs 22 and recesses 23 which are provided uniformly and alternately side by side along the template.
  • the prongs 22 first engage the layer and deform it according to its shape. So they transfer the shape or contour of the template 21 with the teeth 22 and the recesses 23 on the layer of epoxy resin 19. Under certain circumstances, this can also be done by multiple templates in different places, but this is not absolutely necessary.
  • a structure 25 has been produced by means of the template 21 in the layer of epoxy resin 19 on the roll core 15.
  • This structure 25 not only has alternating and juxtaposed elevations 26 and recesses 27. It is also circumferential or rotationally symmetrical, and further corresponds to the shape of the elevations 26 and recesses 27 and the structure 25 of those of the template 21. It can also be seen that the recesses 27 extend to the roller core 15.
  • the height of the serrations 22 or depressions 23 of the stencils 21 is greater than the thickness of the layer of epoxy resin 19, in particular twice as thick. This means that the application of the template 21 with transferring its contour to the layer of epoxy resin 19, no epoxy resin is removed from the roll core, but only redistributed or transformed into the structure 25. The so-called from the tips of the prongs 22 or displaced epoxy resin 19 migrates laterally into the depressions 23 of the template 21 and forms there the elevations 26 of the structure 25.
  • FIG. 2 shows a modification of a production method similar to FIG. 1.
  • the prongs 122 and the recesses 123 of the template 121 are approximately as high as the thickness of a layer of epoxy resin 119 on a roller core 115.
  • top right is thus the layer of epoxy resin 119 in Fig. 2 considerably thicker, in particular about twice as thick.
  • the stencil 121 is attached to the epoxy resin 119 and the roll core 115 is rotated, either a structure exactly the same as that in the third illustration in FIG. 1 can be produced bottom left, ie with elevations and depressions, the depressions except for the roll core Go through.
  • the template 121 could be pressed into the layer with the teeth 122 only to the extent that the epoxy resin 119 is not completely removed, as in the method of FIG. 1, but redistributed becomes. Then, a structure similar to the structure 25 of Fig. 1 at the bottom left is obtained, however, the depressions do not extend to the roll core but a relatively thick layer of epoxy resin therebetween. Depending on the intended use of the finished roll, this can also be advantageously provided. Above all, it can be ensured by a certain excess of epoxy resin 119, which then has to be removed, that a desired structure on the roll core is actually achieved with material into the desired elevations.
  • the finished structure 125 can be produced by turning or milling from a thick layer which has been applied to the roll core 115. This may be done prior to complete cure of the epoxy resin 119.
  • an intermediate covering or also another further covering can be applied to the resulting structure with elevations and depressions.
  • FIG. 3 shows another production method according to the invention for a roll according to the invention.
  • a so-called finished coat 231 is applied to a similar to previously formed roll core 215.
  • the jacket 231 already has the finished structure 225 from elevations 226 and depressions 227.
  • the shape and Design of the structure 225 on the jacket 231 may, for example, in turn be according to the third illustration at the bottom left in FIG.
  • the recesses 227 lie with a thicker layer of epoxy resin over the core 215, so that here the layer thickness is sufficiently large for mechanical stability.
  • a further processing for example by applying an intermediate coating according to the fourth illustration in Fig. 1 bottom right, of course, also take place.
  • the production of the jacket 231 can be done, for example, by casting in a corresponding form. It is important to pay particular attention to exact shape. If the jacket 231 is applied to the core 215, it should not get any stress cracks, so that it sits firmly on it after bonding and does not loosen.

Landscapes

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

Abstract

La présente invention concerne un procédé de fabrication d'un cylindre (11), par exemple destiné au traitement du papier, selon lequel un revêtement (29) est appliqué sur un corps de cylindre (15). Une couche de résine époxy (19) est appliquée sur le corps (15) du cylindre, puis est façonnée au moyen d'un gabarit (21) de type peigne sous forme d'une structure présentant des saillies (26) et des creux (27). Après durcissement de la structure (25), un revêtement intermédiaire (29) ou un revêtement final présentant la forme définitive du cylindre fini (11) est appliqué.
PCT/EP2009/000899 2008-02-25 2009-02-10 Cylindre et procédé de fabrication d'un tel cylindre WO2009106226A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008011497.9 2008-02-25
DE200810011497 DE102008011497A1 (de) 2008-02-25 2008-02-25 Walze und Verfahren zur Herstellung einer solchen Walze

Publications (1)

Publication Number Publication Date
WO2009106226A1 true WO2009106226A1 (fr) 2009-09-03

Family

ID=40548525

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/000899 WO2009106226A1 (fr) 2008-02-25 2009-02-10 Cylindre et procédé de fabrication d'un tel cylindre

Country Status (2)

Country Link
DE (1) DE102008011497A1 (fr)
WO (1) WO2009106226A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010040682A1 (fr) * 2008-10-08 2010-04-15 Voith Patent Gmbh Rouleau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010001940A1 (de) * 2010-02-15 2011-08-18 Beva Specialsvejs Aps Verfahren und Vorrichtung zum Auftragen einer Oberflächenschicht auf eine Walze sowie deren Anwendung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004019306A1 (de) * 2004-04-15 2005-11-03 Schäfer Composites GmbH Oberfläche einer Behandlungseinrichtung und Verfahren zur Herstellung einer solchen Behandlungseinrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004019306A1 (de) * 2004-04-15 2005-11-03 Schäfer Composites GmbH Oberfläche einer Behandlungseinrichtung und Verfahren zur Herstellung einer solchen Behandlungseinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010040682A1 (fr) * 2008-10-08 2010-04-15 Voith Patent Gmbh Rouleau

Also Published As

Publication number Publication date
DE102008011497A1 (de) 2009-08-27

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