EP1215045A1 - Guide roller for pressing webs having an exchangeable sleeve - Google Patents

Abstract

The invention relates to a roller (1) for guiding, in particular for pressing on and / or for the pressure treatment of sheet-like materials, with a core (4) which carries an elastic jacket (3), the core (4) and jacket (3) are directly connected to one another by a fastening layer (2) provided in an intermediate space between the core and cladding material. <IMAGE>

Description

The invention relates to a roller for guiding, in particular for Pressing web-shaped materials, a manufacturing process such a roller, a jacket for making a such a roller, a method for changing the jacket of such Roller and use of such a jacket and one Material according to the definition of the claims.

Known rollers for guiding or pressure treatment of web-shaped Materials are essentially cylindrical Geometry on. They consist of a load-bearing, hard inside Core, made of metal such as steel and one, the Core enclosing on one long side and firmly connected to it elastic jacket made of elastomers. For example, find such rollers use as bending presses for gravure printing systems, where they press evenly against a backing roll guarantee.

The manufacture of such a roller is labor intensive, with one Numerous technically complex process steps connected, inflexible and costly. The surface of the core is in front the application of the jacket material and clean with adhesion promoter to provide. Then thin layers of elastomer are wound up, these elastomer layers are mechanically stabilized and connected to an elastic jacket by vulcanization.

The document DE-195 17 653 shows an improvement in this regard, by the structure of the elastomer layer wrap and its vulcanization to a coat and pulling the coat on the Core is separated. The coat is prefabricated as a sleeve and pressurized to the adhesive agent Core pulled. Because of the separation of the process steps fully automatic manufacture of the jacket becomes possible. Also the transport and storage of the rollers are simplified because only still change coats have to be delivered. Finally done pulling the jacket onto the core quickly.

The elastic jacket is exposed to high frictional forces during operation. Large flexing works also take place in the coat. hereby the roller is heated to a considerable extent, which heat about the core must be removed. Because of the different Coefficient of thermal expansion of the core and cladding materials, as well as due to the unbalance caused by flexing high mechanical stresses on the roller. In particular kick high mechanical stresses at the connection from the core to the jacket on what weakens the connection between the core and the cladding and triggers and leads to failures. It is therefore desirable to have a permanently stable, high-strength connection between the jacket and Core to reduce the failure rates of rollers during operation lower and to increase the life of the rollers.

A worn jacket is replaced by the jacket material down to the core. Injuries often occur of the core through the turning tool, which leads to failures. The The core is then cleaned and provided with a bonding agent. Finally a new coat is put on. It is desirable therefore, a simple, quick and safe procedure for changing the coat, to reduce the failure rates of cores when changing shells lower and to change a coat faster.

The object of the present invention is therefore the disadvantages to avoid the known, especially rolling, processes and uses of the kind described to create a permanent stable and high-strength connection between jacket and core to achieve. The invention is intended to be a method of manufacture create such a roller, which roller simple and inexpensive can be produced. There is also a procedure for changing of the coat with which the coat can be created quickly, easily and can be exchanged safely. The roller, its manufacturing process and the method of changing the sheath should in particular with proven standards of paper, printing, steel, Textile and film / film industry to be compatible.

This object is achieved by the invention as defined in the Claims resolved.

The invention particularly improves the connection of the jacket and core of a roller. According to the prior art, the jacket material by means of a layer directly with the core material connected.

The invention is based on a departure from the previously practiced Bonding of core and jacket using one layer Adhesion promoters. In contrast to the prior art, there is a Connection by means of an intermediate fastening layer. Such an attachment layer is advantageously 0.5 to 15 mm thick, preferably 4 to 8 mm thick and consists of a low-viscosity, cross-linking material, preferably made of a two-component plastic. The core and sheath material is through this attachment layer bonded together and simultaneously separated from each other. This makes it easy to attach the jacket allows on the core.

This allows the different material properties of core and jacket when connecting via the attachment layer optimally match each other.

This mainly concerns the modulus of elasticity. The core is often made of steel and the jacket is made of elastomeric material. Steel has a high modulus of elasticity of around 200,000 N / mm ² , while elastomers have a low modulus of elasticity of 15 to 250 N / mm ² . The difference between these elasticity modules is 3 orders of magnitude. A material for the fastening layer can thus be selected, the modulus of elasticity of which reduces the difference between the modulus of elasticity of the core and the jacket. The fastening layer advantageously consists of epoxy resin with a modulus of elasticity of 800 to 1,000 N / mm ² , so that the difference between the moduli of elasticity is reduced by an order of magnitude.

The roller is also manufactured in a departure from the im State-of-the-art methods. Core and Coat made separately, with the core, for example, the Form of a solid cylinder, or a tube, etc. and the jacket has the shape of a hollow cylinder. In contrast to the state of the According to the method according to the invention, technology is the inside diameter of the jacket larger than the outside diameter of the Core. There is a gap between the core and the jacket. The Sheath is not pulled onto the core as in the prior art, but the core and the mantle become one in this space filled or pressed material connected together.

For this connection of core and cladding, the core of the Centered inner wall spaced in the cavity of the jacket. The centering is advantageously carried out via centering pieces.

Core and jacket have the same longitudinal axis, core outer wall and The inner wall of the jacket is equidistant from one another. The educated one The space between the core and the jacket is made with one material filled. The material is a cross-linking plastic, preferred a two-component material. The material hardens in Gap largely without shrinkage to an attachment layer and thus connects the core and the jacket.

The core outer wall and the inner shell wall have a smooth surface. To support the connection of core and jacket by means of a The outer layer of the core can be roughened or with structuring, which roughening or Structuring a positive engagement of the mounting layer enable with the core. In an analogous way can be roughened the inside wall or with textures are provided, which roughening or structuring one positive engagement of the fastening layer with the jacket enable.

The jacket is also changed in a departure from the prior art. A worn coat has been replaced so far that the worn coat is turned down to the core, often The turning tool can injure the core. The The core is then cleaned, provided with adhesion promoter and a new coat is put on.

In contrast to this, in the method according to the invention Change of coat a worn coat not to the core, but just turned down to the mounting layer. Due to the thickness of the attachment layer, injuries to the Kerns avoided by the turning tool. The attachment layer is at least partially reduced in thickness. thereupon the core including the reduced-thickness mounting layer in the Positioned the cavity of a new jacket and the gap between the core or the reduced-thickness fastening layer and filled the jacket with a viscous material, which The material solidifies into an attachment layer. The advantages of the method according to the invention are obvious, the process steps the cleaning of the core and the application of a There is no adhesion promoter.

The jacket is preferably made of an elastomeric material such as, for example, acrylate rubber or acrylic ester rubber (ACM), acrylate-ethylene-polymethylene rubber (AEM), butadiene rubber or 1,4-polybutadiene (BR), epichlorohydrin rubber (ECO, CO), high polymer epichlorohydrin rubber (CHR), chlorobutyl rubber (CIIR), chloroprene rubber (CR), ethyl acrylate (EA), epoxy resin (EP), ethylene-propylene-diene polymer (terpolymer) Rubber (EPDM), polyurethane elastomer (EU), ethylene-vinyl acetate copolymer (EVAC), ethylene vinyl alcohol (EVOH), Polypropylene-tetrafluoroethylene copolymer (FPM), chlorosulfurized Polyethylene (CSM), butyl rubber (IIR), isoprene rubber (IR), acrylonitrile-acrylate rubber (NBR), acrylonitrile-choroprene rubber (NCR), natural rubber (NR), polyisobutylene (PIB), polytetrafluoroethylene (PTFE), polyurethane (PUR), polyvinyl acetate (PVAC), styrene-butadiene rubber (SBR), silicone rubber (SIQ), unsaturated polyester resin (UP), and thermoplastic Elastomers, duromers such as epoxy / phenol / formaldehyde / Melamine-polyester.

The jacket is made in layers of elastomer in a known manner Made of material. The elastomeric material is applied to one Thorn applied and vulcanized. For example, for this Winding techniques, extrusion techniques or casting techniques used. For example, films or tapes are on a mandrel sprayed on or wrapped. Hoses can also be placed on one Apply the thorn.

Before applying the coat to the mandrel, there will be at least one flexible separating layer, preferably a fabric, for example made of polyamide fibers, which preferably is a textile fabric forms applied to the mandrel.

A first layer of elastomeric material becomes detachable on this Separation layer attached. This first layer made of elastomeric material is preferably 0.5 to 10 mm thick, preferably 2 to 3 mm thick and advantageously consists of ebonite, preferably NR, BR, SBR, NBR, NCR and it has 10 to 90%, preferably 20 to 80% sulfur content.

If the separation layer, especially the tissue, is removed, remains an impression with increased roughness in the surface of the cylindrical opening of the jacket. The separating layer also protects the surface of the mantle in the area where the connection with the core is provided against contamination. Instead of a fabric can e.g. also a plastic film with rough Surface to be applied. Tissue marks with roughness in the order of magnitude less than or equal to 1 mm, preferably less than or equal to 100 µm, preferably in the range from 12 µm to 25 µm has proven itself particularly in practice.

A particularly suitable material for the fastening layer Epoxy resin or epoxy resin combined with a crosslinker or Epoxy glue. The use of an epoxy resin is advantageous combined with a crosslinker that is at least partially contains modified polyamines such as polyamide amine. Such a Material hardens to a connection layer with a particularly high one Temperature resistance. The expert can with knowledge of present invention various combinations of one Realize epoxy resin with a crosslinker.

The material can be high or low viscosity. Highly viscous Materials can be placed in the space between the core and Press coat, low-viscosity materials can be in this Fill the space. The use has been particularly advantageous proven by an epoxy resin combined with polyamide amine. This low-viscosity material has according to DIN 53018 25 ° C a viscosity value of 8,000 MPa sec for the epoxy resin and a viscosity value of 300 MPa sec for polyamide amine. With Such viscosity values are when filling the gap between core and jacket surface unevenness of the jacket from Material filled out. This will make the surface of the connecting Border layer enlarged. In addition, the hardened Boundary layer of the material in the surface irregularities of the coat. This leads to significantly improved resilience against torsional forces.

It is advantageous if the fastening layer in the temperature range from 20 ° to 100 ° C a coefficient of thermal expansion from 0.2% to 2%, preferably 0.5% to 0.9%.

It is also particularly advantageous if the elastic modulus of the fastening layer is 800 to 1,000 N / mm ² , but at least 30 N / mm ² .

In connection with steel cores, such coefficients of thermal expansion result respectively elasticity modules of the attachment layer to particularly robust and durable Roll designs.

The invention is suitable for a wide variety of applications. The invention is primarily suitable for manufacturing of pressure rollers for printing machines. Such rollers are suitable but also for textile machines or paper machines and all Types of plants in which web-shaped materials are guided. For example, such rollers are used in the packaging industry for laminating, printing, painting and transporting of packaging materials and in the steel processing industry used for painting, stripping and as guide rollers. Especially with large pressure forces and corresponding walk loads, high speeds and required downtimes the invention is particularly good.

Fig. 1

eine schematische Darstellung eines Teils einer Ausführungsform einer Walze in Seitenansicht,

Fig. 2

eine schematische Darstellung eines Teils einer Ausführungsform eines Kerns in Ansicht,

Fig. 3

eine schematische Darstellung eines Teils einer Ausführungsform eines Mantels in Seitenansicht,

Fig. 4

ein schematisches Blockdiagramm der Verfahrensschritte bei der Herstellung einer Walze,

Fig. 5

ein schematisches Blockdiagramm der Verfahrensschritte beim Wechseln eines Mantels und

Fig. 6

die schematische Darstellung eines Mantels mit Trennschicht.

The invention is explained in more detail below in exemplary embodiments with reference to FIGS. 1 to 6. Show it:

Fig. 1

1 shows a schematic illustration of part of an embodiment of a roller in a side view,

Fig. 2

1 shows a schematic illustration of part of an embodiment of a core,

Fig. 3

1 shows a schematic illustration of part of an embodiment of a jacket in side view,

Fig. 4

1 shows a schematic block diagram of the process steps in the manufacture of a roll,

Fig. 5

a schematic block diagram of the process steps when changing a jacket and

Fig. 6

the schematic representation of a jacket with a separating layer.

Fig. 1 shows schematically a roller 1 for the pressure treatment of sheet-like materials with a core 4, which has an elastic Coat 3 wears. Core 4 and jacket 3 are by one that Fastening layer separating core and cladding material 2 connected together.

An exemplary embodiment of a cylindrical core 4 is shown in Fig. 2. Traditionally, the core is 4 made of a hard material such as metal, for example steel. But it is also possible to use the core 4 made of other hard materials how to manufacture fiber reinforced synthetic resin. For example document EP-0 385 948 discloses a core made of epoxy resin and reinforcing carbon fibers. The core 4 can be a solid cylinder or a tube. It is advantageous an outer wall of the core 4 roughened or structured 41, which roughening or structuring 41 a positive engagement of the attachment layer 2 with the core enable. This roughening or structuring 41 lead to a surface enlargement. You can partial or Cover the outer wall of the core 4 completely. In the exemplary Embodiment of a core 4 according to FIG. 2 are the structuring 41 grains consisting of lengthways and crossways for the elongated expansion of the core 4 extending carbon fibers. Those skilled in the art can understand the present invention implement other structures in the outer wall of a core, for example, it can be the outer wall of a core by applying grooves, ridges or a rough thread structure.

An exemplary embodiment of a hollow cylindrical jacket 3 is shown in FIG. 3. The jacket 3 is preferably made of elastomeric material such as acrylate rubber or acrylic ester rubber (ACM), acrylate-ethylene-polymethylene rubber (AEM), butadiene rubber or 1,4-polybutadiene (BR), Epichlorohydrin rubber (ECO, CO), high polymer epichlorohydrin rubber (CHR), chlorobutyl rubber (CIIR), chloroprene rubber (CR), ethyl acrylate (EA), epoxy resin (EP), ethylene-propylene-diene polymer (terpolymer) Rubber (EPDM), polyurethane elastomer (EU), ethylene vinyl acetate copolymer (EVAC), Ethylene vinyl alcohol (EVOH), polypropylene tetrafluoroethylene copolymer (FPM), chlorosulfurized polyethylene (CSM), butyl rubber (IIR), isoprene rubber (IR), acrylonitrile-acrylate rubber (NBR), acrylonitrile-choroprene rubber (NCR), natural rubber (NR), polyisobutylene (PIB), polytetrafluoroethylene (PTFE), polyurethane (PUR), polyvinyl acetate (PVAC), styrene-butadiene rubber (SBR), silicone rubber (SIQ), unsaturated Polyester resin (UP), as well as thermoplastic elastomers, duromers such as epoxy / phenol / formaldehyde / melamine polyester. advantageously, is an inner wall of the jacket 3 roughened or with Structuring 31 provided, which roughening or structuring 31 a positive engagement of the fastening layer 2 allow with the jacket 3. These roughening or Structures 31 lead to an increase in surface area. You can partially or completely cover the inner wall of the jacket 3 cover. In the exemplary embodiment of a 3 are the structuring 31 impressions, which originate from a separating layer 12 according to FIG. 6. Such, the jacket 3 during transport and storage from dirt and Injury-protecting separating layer 12 advantageously exists from a fabric and preferably forms a textile fabric. The separating layer 12 is provided with longitudinal and transverse fibers, which longitudinal and transverse fibers along and on the inner wall 3 impressions running transversely to the longitudinal extension of the jacket produce. Those skilled in the art can understand the present invention other structures in the inner wall of a jacket Realize, for example, the inside wall of a jacket roughen with a brush and / or into the inner wall of a jacket Rotate structures. The jacket is advantageously produced as shown schematically in Fig. 6.

The jacket 3 has an inner diameter that is greater than is the outside diameter of the core 4. The core 4 can thus be Center in the cavity of the jacket 3. This space between jacket 3 and core 4 is advantageously 0.5 to 15 mm thick, preferably 4 to 8 mm thick and separates the core and Jacket material from each other so that they do not touch.

It is advantageous when the attachment layer is applied for the first time on the core, this core is cleaned beforehand and provided with an adhesion promoter.

Then a cross-linking material is placed in the space between Core 4 and jacket 3 filled or pressed. The material can be high or low viscous. Leave highly viscous materials press into the space between the core and the coat, low-viscosity Materials can be filled in this space. The material fills the space without bubbles. The material is flowable enough to roughen and structuring 31, 41 to penetrate. Particularly advantageous the use of an epoxy resin has been combined proven with polyamide amine. This low-viscosity material has according to DIN 53018 at 25 ° C a viscosity value of 8,000 MPa sec for the epoxy resin and a viscosity value of 300 MPa sec for polyamide amine. The material hardens to a large extent in the space between shrink-free to the fastening layer 2 and thus connects Core 4 and jacket 3. The shrinkage value of the material is in a temperature range from 20 ° C to 100 ° C, for example 0.2% to 2%, preferably 0.5% to 0.8%.

The connection of core 4 and the jacket 3 can be done via the Intermediate attachment layer 2 optimally match each other.

The process steps are shown in the schematic block diagram according to FIG. 4 reproduced by way of example in the manufacture of a roller 1. In a first method step 10, a jacket 3 is produced, in a second method step 20 a Core 4 made. In process steps 11 and 21 the Jacket 3 and the core 4 in a jacket storage, respectively in one Core bearings transported. In a third method step 30 the core 4 is centered in the jacket 3. In a fourth step 40 becomes the space thus formed between the jacket 3 and core 4 filled with a material. In a fifth Method step 50 largely hardens the material in the intermediate space shrinkage-free to a sheath 3 and core 4 connecting fastening layer 2 out.

In the first method step 10, the jacket 3 is produced and transported in a further process step 11 into a jacket store. The jacket 3 is manufactured by a jacket manufacturer in methods according to the prior art. For example an elastomer layer wrap is built up and becomes one Coat 3 vulcanized. In addition to winding techniques, however also use extrusion techniques or casting techniques. For example foils or tapes are sprayed onto a mandrel or wrapped. Hoses can also be placed on one Apply the thorn. The jacket 3 is thus prefabricated as a sleeve and packed for transportation. The storage of the jacket 3 takes place at the coat manufacturer and / or at a coat supplier and / or at a sheath end customer. The invention 6 provides, as a preliminary in the manufacture of the jacket a separation layer made of a material with rough Apply surface. 6 there is at least one Separating layer 12, preferably made of a fabric, which is a textile Sheets are introduced. The separating layer covers 12 the jacket 3 made of elastomeric material from the inside and imprints the structure of the flat structure on the inner surface of the jacket. This structure of the fabric is the inner surface roughened by the coat 3 in a controlled manner. Before applying on a core 4, the separating layer 12 is pulled out laterally. The jacket 3 is then with a clean, roughened interior Surface positioned on the core 4 in the manner described.

In a similar manner, the core 4 proceed. In the second method step 20, the core 4 produced and in a further process step 21 in one Core bearings transported. The core 4 is produced at a core manufacturer in state-of-the-art processes. Optionally, 4 roughening or Structures 41 attached. The core 4 is stored at the core manufacturer and / or at a core supplier and / or with a core end customer.

In the third method step 30, the core 4 is centered in the jacket 3. The space between the jacket 3 and the core 4 is advantageous 0.5 to 15 mm thick, preferably 4 to 8 mm thick and separates the core and cladding material from each other so that don't touch each other. Special spacers can be used for centering can be used as centering pieces.

In the fourth method step 40, a material is placed in the space filled or pressed between core 4 and jacket 3. In a preferred variant, the core 4 in the jacket 3 is largely positioned vertically so that the material only under the effect of gravity in the space flows and completely, without trapping air bubbles, fills. For this purpose, a lower opening of the intermediate space is used suitable positive means closed during the Material filled into the intermediate space through an upper opening becomes. The material is sufficiently flowable, even in roughening and structuring 31, 41 to penetrate.

The material for the attachment layer 2 is particularly suitable Epoxy resin or epoxy resin combined with a crosslinker or epoxy adhesive. The use of one is advantageous Epoxy resin combined with a crosslinker, at least contains partially modified polyamines such as polyamide amine. On such material hardens to a connection layer with particular high temperature resistance. Advantageously the material is mixed with a hardener immediately before filling.

In the fifth method step 50, the material solidifies in the intermediate space largely without shrinkage to the attachment layer 2 and thus connects core 4 and jacket 3. The composition of the material is selected so that it hardens without tempering. In this regard, the use of an epoxy resin is advantageously combined with a crosslinker that was at least partially modified Contains polyamines such as polyamide amine.

The third, fourth and fifth method steps 30, 40 and 50 can be obtained from the roller manufacturer and / or the jacket or Core manufacturer and / or the jacket or core supplier and / or with the end customer.

The method steps are in the schematic block diagram according to FIG. 5 when changing an elastic jacket 3 one Roller 1 shown as an example. The first, third to fifth Method steps 10, 30, 40, 50 correspond to those in the description the manufacture of a roller 1 according to FIG. 4, so that this is referred to and only differences below to produce a roller 1 will be explained.

In contrast to the production of a roller 1 takes place when changing an elastic jacket 3 of a roller 1 a sixth method step 60, in which a worn coat 3 up in the attachment layer 2 is turned off. The attachment layer 2 does not have to be completely removed. This allows Avoid damage to the core 4 by the turning tool. The fastening layer is advantageously 0.5 to 15 mm thick, preferably 4 to 8 mm thick. The attachment layer 2 is at least partially reduced in thickness. For example the attachment layer 2 to half its thickness ablated. Thereupon the core 4 is partially reduced in thickness Attachment layer 2 in the cavity of a new one Positioned jacket 3 and the space between the core 4th or the reduced-thickness fastening layer 2 and jacket 3 filled with a material that leads to a new fastening layer 2 hardens.

Claims (21)

Roller (1) for guiding, in particular for pressing and / or for the pressure treatment of sheet-like materials, with a core (4) which carries an elastic jacket (3), characterized in that the core (4) and jacket (3) directly are connected to one another by a fastening layer (2) provided in an intermediate space between the core and the cladding material. Roller (1) according to claim 1, characterized in that the fastening layer is advantageously 0.5 to 15 mm thick, preferably 4 to 8 mm thick. Roll (1) according to claim 1 or 2, characterized in that the fastening layer (2) consists of a crosslinking material, preferably of a two-component material. Roller (1) according to one of claims 1 to 3, characterized in that the core (4) and jacket (3) have different elasticity modules and that the fastening layer (2) has an elasticity module of preferably in the range from 800 to 1,000 N / mm ² , which elastic modulus of the fastening layer (2) reduces the difference between the elastic moduli of the core (4) and the jacket (3). Roller (1) according to one of claims 1 to 4, characterized in that an outer wall of the core (4) is roughened or provided with textures (41) and / or that an inner wall of the casing (3) is roughened or with textures (31 ) is provided, which roughening or structuring (31, 41) allow a positive engagement of the fastening layer (2) with the core (4) and / or the jacket (3). Roller (1) according to claim 5, characterized in that the roughening is produced by the impression of a separating layer (12). A method for producing an elastic jacket (3) for a roller (1) for guiding, in particular for pressing and / or pressure-treating web-shaped materials, the jacket (3) being formed on a mandrel from elastomeric material and then vulcanized, characterized that a separating layer (12) is detachably attached under a first layer of elastomeric material and then the jacket (3) is formed. Method for producing an elastic jacket (3) for a roller (1) according to claim 7, characterized in that the material for the separating layer (12) is selected such that the impression of the surface of the separating layer (12) after removal of the desired Surface structure or roughness corresponds to the jacket surface. Method for producing an elastic jacket (3) for a roller (1) according to claim 7 or 8, characterized in that a separating layer (12) made of a textile fabric is used. Method for producing an elastic jacket (3) for a roller (1) according to claim 7, characterized in that the first layer of elastomeric material is 0.5 to 10 mm thick, preferably 2 to 3 mm thick, that it is made of ebonite, preferably consists of NR, BR, SBR, NBR, NCR and that it has a sulfur content of 10 to 90%, preferably 20 to 80%. Elastic jacket (3) made according to one of the claims 7 to 10. Method for producing a roller (1) for guiding, in particular for pressing on and / or for the pressure treatment of sheet-like materials, with a core (4), preferably a metal core, which carries an elastic jacket (3), characterized in that the core (4) and sheath (3) are produced in separate steps, the sheath (3) having an inner diameter that is larger than the outer diameter of the core (4), that the core (4) in the sheath (3) relative to it Longitudinal axis is centered so that the space thus formed between the core (4) and the jacket (3) is filled with a liquid, hardening, in particular cross-linking material, which material in the intermediate space forms a fastening layer (2) connecting the core (4) and the jacket (3) ) is curable. A method for producing a roller (1) according to claim 12, characterized in that the material in the space is cured largely without shrinkage and largely without tempering. Method for producing a roller (1) according to claim 12 or 13, characterized in that an outer wall of the core (4) is roughened or provided with structures (41) and / or that the inner wall of the jacket (3) is roughened or with structures ( 31) is provided. Method for producing a roller (1) according to one of the Claims 12 to 14 using an elastic jacket (3) according to claim 11. A method for producing a roller (1) according to claim 15, characterized in that the separating layer (12) is removed before positioning the jacket (3) on the core (4). Method for exchanging an elastic jacket (3) of a roller (1), in particular according to one of claims 1 to 7, with a core (4) which carries a jacket (3), characterized in that the jacket (3) up to a fastening layer (2) is removed between the core (4) and the casing (3) and the fastening layer (2) is at least partially reduced in thickness, so that a new casing (3) on the core (4) over the fastening layer (2 ) is centered, and that the remaining space between the reduced-thickness fastening layer (2) and the jacket (3) is filled with a liquid, hardening, in particular cross-linking material, which material hardens in the space largely without shrinkage and thereby partially worn attachment layer (2) connects. Use of a material consisting of epoxy resin or made of epoxy resin in combination with a crosslinker or Made of an epoxy adhesive for the direct connection of an elastic Jacket (3) with a core (4) of a roller (1) for Lead, especially for pressing and / or for pressure treatment of sheet-like materials and to produce one Fastening layer (2) in a space between the jacket (3) and core (4). Use of a material according to claim 18, characterized in that the crosslinker contains at least partially modified polyamines such as polyamide amine. Use of a material according to claim 18 or 19, characterized in that the epoxy resin according to DIN 53018 has a viscosity of 8,000 MPa sec at 25 ° C and that the crosslinker has a viscosity of 300 MPa sec. Use of an elastic jacket (3) for a roller (1) for guiding, in particular for pressing on and / or for pressure treatment of sheet-like materials, with a core (4), which carries the jacket (3), the jacket (3) having a surface roughness less than / equal to 1 mm, preferably less than / equal to 100 µm, preferably in the range from 12 µm to 25 µm in the area of a space between the core (4) and the jacket (3).

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