EP1659216A1 - Roll for the production of a web, in particular for the dewatering of pulp - Google Patents

Roll for the production of a web, in particular for the dewatering of pulp Download PDF

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Publication number
EP1659216A1
EP1659216A1 EP05025312A EP05025312A EP1659216A1 EP 1659216 A1 EP1659216 A1 EP 1659216A1 EP 05025312 A EP05025312 A EP 05025312A EP 05025312 A EP05025312 A EP 05025312A EP 1659216 A1 EP1659216 A1 EP 1659216A1
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European Patent Office
Prior art keywords
layer
roller
inner layer
roller according
outer layer
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EP05025312A
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German (de)
French (fr)
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EP1659216B1 (en
Inventor
Karl-Ulrich Schäfer
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Schafer KG
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Schafer KG
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    • 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
    • D21F3/083—Pressure rolls perforated
    • 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
    • D21F3/086—Pressure rolls having a grooved surface

Definitions

  • the invention relates to a roller, as used for the dewatering of the required for the production of paper, cardboard and pulp slurry of fibers, for example, so-called tissue material from which absorbent and soft kitchen towels or the like. be made or paper-like material such as cardboard.
  • the roller is designed for use in the wet press of a paper machine.
  • the invention relates to the use of such a roller.
  • the roller in this case has an elastic roller coating, which is advantageous for the dewatering of pulp and the production of paper and cardboard.
  • the invention has for its object to provide an aforementioned roller, with which the problems of the prior art can be avoided and in particular the dewatering of pulp for tissue material is more effective and gentler for the fiber composite in front of him and the rollers at the same time longer service life to have.
  • the roller has several layers or the outer layers of a roller or a type of functional covering of a roll cover are divided into two layers.
  • An outer or outermost layer is relatively hard and wear-resistant. In it, bores and / or recesses may be provided, which are formed in particular for the removal of water from the pressed sheet material.
  • the outer layer is on a relative soft inner layer applied.
  • the inner layer and the outer layer advantageously consist of solid material.
  • the subject of the invention is thus above all the functional coating, which is divided into an inner softer layer which provides the desirable wider nip and a harder outer layer which offers the higher wear resistance and the possibility of additional grooving. Due to their higher hardness, there is no risk of closing the groove under load. At the same time, this harder layer offers a higher wear resistance compared to the softer inner layer.
  • the division is independent of partially multilayer, thin bonding layers or interconnecting intermediate layers, which are used, for example, a stable bonding of the coatings to a metal core or the like. to ensure.
  • the high modulus jump between metal and elastic cover gradually "softened” or adapted.
  • Any used binding layers or intermediate layers are not the subject of the invention.
  • outer layer and inner layer in connection with this application are intended to mean that the outer layer is the outermost and thus outermost layer.
  • Inner layer means a layer underlying the outer layer.
  • very thin intermediate layers could be provided, which, however, do not significantly affect the elastic properties.
  • the connection of the two layers can be made via suitable, with 20 microns to 1.5 mm very thin intermediate layers, which are applied by brushing or spraying. They can cause elastomeric or direct chemical bridging between the layers.
  • holes or depressions or grooves are provided only in the outer layer.
  • press rolls they can reach as far as the underlying inner layer, but advantageously not into it.
  • the grooves closing during compression in particular when pressed together with high pressures.
  • the depressions may possibly extend through the outer layer, possibly into the interior of the roll core.
  • At least the outer layer should advantageously consist of materials based on natural and synthetic rubbers, blends of various rubbers and / or polyurethane.
  • rubber may be used, preferably solid rubber.
  • the outer layer In order to make the outer layer relatively hard, it may have a hardness of 80 ° to 100 ° Shore A, preferably over 90 ° Shore A, for example 90 ° to 98 °.
  • the relatively soft inner layer may have a hardness of 40 ° to 90 ° Shore A, preferably 60 ° to 85 ° Shore A.
  • the thickness can and should be different.
  • the outer layer should be thinner than the inner layer, for example, have a thickness of 3 to 15mm, advantageously in a range between 5 and 10mm.
  • the inner layer should be thicker than the outer, it can be in a range of about 5 to 50 mm, advantageously 10 to 30 mm. This means that the inner layer can generally be about two to five times as thick as the outer one.
  • the absolute thicknesses are also dependent on the overall diameter of the roller.
  • a metal core or metal body is advantageously provided, on which the layer structure is applied.
  • an intermediate layer may be provided between the supporting core and the inner soft layer.
  • This intermediate layer may also be made of rubber.
  • An adaptation of the material properties between hard metal and relatively soft inner layer is particularly advantageously achieved by the intermediate layer when its hardness is higher than that of the soft inner layer. For example, it may be approximately in the range of the hardness of the outer Layer, whereby advantageously the number of required materials for the layer production can be kept low.
  • the intermediate layer may also be thinner than the soft inner layer, since it is intended only for the adaptation of the inner layer to the steel core or steel body, but not for influencing the overall properties of the roll in terms of flexibility or the like.
  • the layers are applied successively to the roll or core.
  • a rubber material is advantageously vulcanized onto the underlying layer. This makes it possible to create particularly durable bandages, especially in the case of compounds from rubber to rubber as well as to metal.
  • a roll as described above is particularly advantageously used in the dewatering of the pulps of fibrous material required for the manufacture of paper, board and pulp, preferably tissue, paper pulp or paper-like material. Especially with these soft materials, the flexibility of the roll comes into play, while at the same time increasing wear resistance and improving the quality of the web materials produced. Other applications for such a roller are conceivable, for example in paper, cardboard or the like.
  • a roller 11 is shown in section.
  • it can be used in a press shop to produce tissue material, relatively soft paper or even board, for the pulp needed for the production of paper, board and pulp.
  • an intermediate layer 15 is first applied on a steel core 13, which may be of any design and having at its ends not shown shaft ends for storage. It has a thickness of several millimeters and is made of solid rubber. On the intermediate layer 15, the inner layer 20 is applied by vulcanization. It has a thickness of about 15mm. On the inner layer 20, in turn, the outer layer 30 is vulcanized with a thickness of about 5mm. Instead of rubber could be used as a material here also polyurethane.
  • all layers 15, 20 and 30 are made of solid rubber.
  • the hardnesses of the intermediate layer 15 and the outer Layer 30 is at about 95 ° shore A.
  • the hardness of the soft inner layer 20 is about 70 ° Shore A.
  • outer layer 30 bores 32 and grooves 34 has. Although these extend to the intermediate layer 20, but do not penetrate into this.
  • the distributed holes 32 and grooves 34 may look like. Of course, other distributions are possible here, for example, only holes or grooves only partially. However, a structuring of the bores 32 or grooves 34 that is uniform over the entire surface of the roller 11 is preferred.
  • the bores may have a diameter of 1 to 6 mm.
  • Blind holes can be 4 to 200 mm deep.
  • the grooves may have a width of 0.4 to 2 mm and be 1 to 5 mm deep.
  • the web width can be 1 to 4 mm.

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Abstract

The press roller (11), especially for extracting water from a wet tissue web, has a number of outer layers around the core (13). The outermost layer (30) is relatively hard and thin, over a significantly thicker layer (20) which is relatively soft. The two layers are supported by a bottom layer (15) against the roller core. The layers are of rubber, vulcanized together. The outer surface is fitted with recesses (34) and/or blind drillings (32).

Description

Die Erfindung betrifft eine Walze, wie sie für die Entwässerung der für die Herstellung von Papier, Karton und Zellstoff benötigten Aufschlämmung von Faserstoffen genutzt wird, beispielsweise sogenanntem Tissue-Material, aus welchem saugfähige und weiche Küchentücher odgl. gemacht werden, oder papierähnlichem Material wie Karton. Insbesondere ist die Walze für den Einsatz in der Nasspresse einer Papiermaschine ausgebildet. Des weiteren betrifft die Erfindung die Verwendung einer solchen Walze. Die Walze weist dabei eine elastische Walzenbeschichtung auf, die für die Entwässerung von Papierstoff und die Herstellung von Papier und Karton vorteilhaft ist.The invention relates to a roller, as used for the dewatering of the required for the production of paper, cardboard and pulp slurry of fibers, for example, so-called tissue material from which absorbent and soft kitchen towels or the like. be made or paper-like material such as cardboard. In particular, the roller is designed for use in the wet press of a paper machine. Furthermore, the invention relates to the use of such a roller. The roller in this case has an elastic roller coating, which is advantageous for the dewatering of pulp and the production of paper and cardboard.

Da derartige Walzentypen meist einer hohen Linienlast unterliegen, besteht bei gerillten Beschichtungen eine Einengung der möglichen Beschichtungshärten: Um das nicht zulässige Schließen (Zusammendrücken) der Rillen unter Last zu verhindern, werden je nach Linienlast relativ harte Bezüge eingesetzt, die technologisch für eine optimale Entwässerung häufig eine ungünstige Lösung darstellen. Besser wären in vielen Papiermaschinen, besonders auch vorgenannten Maschinen für Tissue-Material, relativ weiche Bezüge mit einer Härte im Bereich 70 bis 90° Shore A, die bei einer definierten Linienlast zu vorteilhaften, längeren Presszonen führen, sogenannten breiteren Pressnips. Solche Materialien sind aber nicht ausreichend verschleißfest oder bei ausreichender Verschleißfestigkeit nicht ausreichend elastisch und/oder können wegen der oben geschilderten Zusammenhänge nicht gerillt werden.Since such types of rolls are usually subject to high line load, there is a narrowing of the possible coating hardening grooved coatings: In order to prevent the unallowable closing (compression) of the grooves under load, depending on the line load relatively hard covers are used, which technologically for optimal drainage often represent an unfavorable solution. Better would be in many paper machines, especially the aforementioned machines for tissue material, relatively soft covers with a hardness in the range 70 to 90 ° Shore A, which lead at a defined line load to advantageous, longer press zones, so-called wider press nips. However, such materials are not sufficiently wear-resistant or, given sufficient wear resistance, are not sufficiently elastic and / or can not be grooved because of the above-described relationships.

Aufgabe und LösungTask and solution

Der Erfindung liegt die Aufgabe zugrunde, eine eingangs genannte Walze zu schaffen, mit welcher die Probleme des Standes der Technik vermieden werden können und insbesondere das Entwässern von Papierstoff für Tissue-Material effektiver und schonender für den Faserverbund vor sich geht und die Walzen gleichzeitig höhere Standzeiten haben.The invention has for its object to provide an aforementioned roller, with which the problems of the prior art can be avoided and in particular the dewatering of pulp for tissue material is more effective and gentler for the fiber composite in front of him and the rollers at the same time longer service life to have.

Gelöst wird diese Aufgabe durch eine Walze mit den Merkmalen des Anspruchs 1 sowie eine Verwendung mit den Merkmalen des Anspruchs 13. Vorteilhafte sowie bevorzugte Ausgestaltungen der Erfindung sind Gegenstand der weiteren Ansprüche und werden im folgenden näher erläutert. Der Wortlaut der Ansprüche wird durch ausdrückliche Bezugnahme zum Inhalt der Beschreibung gemacht.This object is achieved by a roller with the features of claim 1 and a use with the features of claim 13. Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below. The wording of the claims is incorporated herein by express reference.

Erfindungsgemäß ist vorgesehen, dass die Walze mehrere Schichten aufweist bzw. die äußeren Schichten einer Walze bzw. einer Art Funktionsbelag eines Walzenbezugs in zwei Schichten aufgeteilt werden. Eine äußere bzw. äußerste Schicht ist dabei relativ hart und verschleißfest. Darin können Bohrungen und/oder Vertiefungen vorgesehen sein, welche insbesondere für den Abtransport von Wasser aus dem gepressten Bahnmaterial ausgebildet sind. Die äußere Schicht ist auf eine relativ weiche innere Schicht aufgebracht. Die innere Schicht und die äußere Schicht bestehen dabei vorteilhaft aus Vollmaterial.According to the invention, it is provided that the roller has several layers or the outer layers of a roller or a type of functional covering of a roll cover are divided into two layers. An outer or outermost layer is relatively hard and wear-resistant. In it, bores and / or recesses may be provided, which are formed in particular for the removal of water from the pressed sheet material. The outer layer is on a relative soft inner layer applied. The inner layer and the outer layer advantageously consist of solid material.

Gegenstand der Erfindung ist also vor allem der Funktionsbelag, der aufgeteilt wird in eine innen liegende weichere Schicht, die für den wünschenswerten breiteren Nip sorgt und in eine härtere äußere Schicht, die die höhere Verschleißfestigkeit und die Möglichkeit der zusätzlichen Rillung bietet. Aufgrund ihrer höheren Härte besteht kein Risiko des Schließens der Rille unter Belastung. Gleichzeitig bietet diese härtere Schicht eine im Vergleich zur weicheren inneren Schicht eine höhere Verschleißfestigkeit.The subject of the invention is thus above all the functional coating, which is divided into an inner softer layer which provides the desirable wider nip and a harder outer layer which offers the higher wear resistance and the possibility of additional grooving. Due to their higher hardness, there is no risk of closing the groove under load. At the same time, this harder layer offers a higher wear resistance compared to the softer inner layer.

Die Aufteilung ist unabhängig von teilweise mehrschichtigen, dünnen Bindelagen oder verbindenden Zwischenschichten, die eingesetzt werden, um beispielsweise eine stabile Bindung der Beschichtungen an einen Metallkern odgl. zu gewährleisten. Dabei wird der hohe E-Modul-Sprung zwischen Metall und elastischem Bezug stufenweise "abgemildert" bzw. angepasst. Eventuell verwendete Bindelagen oder Zwischenschichten sind nicht Gegenstand der Erfindung.The division is independent of partially multilayer, thin bonding layers or interconnecting intermediate layers, which are used, for example, a stable bonding of the coatings to a metal core or the like. to ensure. Here, the high modulus jump between metal and elastic cover gradually "softened" or adapted. Any used binding layers or intermediate layers are not the subject of the invention.

Dieser Aufbau, unter dem noch andere Schichten vorhanden sein können, ermöglicht es durch die äußere harte Schicht, darin die Bohrungen bzw. Vertiefungen oder Rillen gut und in definiertem Maß einzubringen. Die Standzeiten werden durch die die Außenschicht bildende harte und widerstandsfähige Schicht erhöht, da sich die harte Schicht nicht so schnell abnutzt. Die darunter liegende weiche Schicht bestimmt in gro-βem Maß die gewünschte Flexibilität bzw. Nachgiebigkeit der Walze, also auch den entstehenden Nip. Insgesamt wird somit eine an sich relativ weiche Walze bereitgestellt, wie es in etwa der inneren Schicht entspricht, welche an der Außenseite jedoch eine relativ harte Schicht aufweist. Somit ist sie vor direktem Verschleiß oder Abnutzung gut geschützt. Die resultierenden Eigenschaften können über die jeweiligen Parameter der einzelnen Schichten wie Material, Materialhärte und Schichtdicke eingestellt werden, auf welche nachfolgend noch genauer eingegangen wird.This structure, under which still other layers may be present, makes it possible by the outer hard layer to bring in the wells or grooves well and in a defined degree. The life is increased by the outer layer forming hard and resistant layer, since the hard layer does not wear out so fast. The underlying soft layer largely determines the desired flexibility or resilience of the roller, including the resulting nip. Overall, therefore, a roll which is relatively soft in itself is provided, as corresponds approximately to the inner layer, which, however, has a relatively hard layer on the outer side. Thus, it is well protected against direct wear or tear. The resulting properties can be over the respective Parameters of the individual layers such as material, material hardness and layer thickness are set, which will be discussed in more detail below.

Die Definitionen äußere Schicht und innere Schicht sollen im Zusammenhang mit dieser Anmeldung bedeuten, dass die äußere Schicht die außenliegende und somit äußerste Schicht ist. Innere Schicht bedeutet eine unter der äußeren Schicht liegende Schicht. Vorteilhaft liegt sie direkt darunter, dies muss jedoch nicht zwangsläufig so sein. Auch hier könnten sehr dünne Zwischenschichten vorgesehen sein, welche jedoch die Elastizitätseigenschaften nicht wesentlich beeinflussen. So kann die Verbindung der beiden Schichten über geeignete, mit 20 µm bis 1,5 mm sehr dünne Zwischenschichten erfolgen, die durch Streichen oder Sprühen aufgetragen werden. Sie können elastomere oder direkte chemische Brückenbildung zwischen den Schichten bewirken.The definitions outer layer and inner layer in connection with this application are intended to mean that the outer layer is the outermost and thus outermost layer. Inner layer means a layer underlying the outer layer. Advantageously, it is directly below, but this does not necessarily have to be the case. Again, very thin intermediate layers could be provided, which, however, do not significantly affect the elastic properties. Thus, the connection of the two layers can be made via suitable, with 20 microns to 1.5 mm very thin intermediate layers, which are applied by brushing or spraying. They can cause elastomeric or direct chemical bridging between the layers.

In vorteilhafter Ausgestaltung der Erfindung ist es möglich, dass Bohrungen bzw. Vertiefungen oder Rillen lediglich in der äußeren Schicht vorgesehen sind. Sie können beispielsweise bei Presswalzen bis zur darunter liegenden inneren Schicht reichen, vorteilhaft jedoch nicht in diese hinein. So kann verhindert werden, dass sich beim Zusammenpressen die Rillen schließen, insbesondere bei einem Zusammenpressen mit hohen Drücken. Bei Saugwalzen können die Vertiefungen unter Umständen durch die äußere Schicht hindurch reichen, unter Umständen bis in das Innere des Walzenkerns.In an advantageous embodiment of the invention, it is possible that holes or depressions or grooves are provided only in the outer layer. For example, in press rolls, they can reach as far as the underlying inner layer, but advantageously not into it. Thus, it is possible to prevent the grooves closing during compression, in particular when pressed together with high pressures. In suction rolls, the depressions may possibly extend through the outer layer, possibly into the interior of the roll core.

Zumindest die äußere Schicht sollte vorteilhaft aus Werkstoffen auf Basis von Natur- und Synthesekautschuken, Verschnitte verschiedener Kautschuke und/oder Polyurethan bestehen. Insbesondere kann Gummi verwendet werden, vorzugsweise Vollgummi.At least the outer layer should advantageously consist of materials based on natural and synthetic rubbers, blends of various rubbers and / or polyurethane. In particular, rubber may be used, preferably solid rubber.

Von großem Vorteil ist es, auch die innere Schicht aus einem vorgenannten Material bzw. Gummi herzustellen. Es sind auch Kombinationen aus kautschukbasierenden inneren Schichten und Polyurethan-Deckschichten als äußere Schichten möglich.It is of great advantage to also produce the inner layer of an aforementioned material or rubber. Combinations of rubber-based inner layers and polyurethane cover layers as outer layers are also possible.

Um die äußere Schicht relativ hart zu machen, kann sie eine Härte von 80° bis 100° Shore A aufweisen, vorzugsweise über 90° Shore A, beispielsweise 90° bis 98°. Die relativ weiche innere Schicht kann eine Härte von 40° bis 90° Shore A aufweisen, vorzugsweise 60° bis 85° Shore A. Dadurch kann ein deutlicher Unterschied in der Härte der beiden Schichten erreicht werden, welcher die jeweils gewünschten Eigenschaften bewirkt.In order to make the outer layer relatively hard, it may have a hardness of 80 ° to 100 ° Shore A, preferably over 90 ° Shore A, for example 90 ° to 98 °. The relatively soft inner layer may have a hardness of 40 ° to 90 ° Shore A, preferably 60 ° to 85 ° Shore A. As a result, a significant difference in the hardness of the two layers can be achieved, which causes the respective desired properties.

Zusätzlich zu der unterschiedlichen Härte der Schichten kann und sollte die Dicke unterschiedlich sein. Die äußere Schicht sollte dünner sein als die innere Schicht, beispielsweise eine Dicke von 3 bis 15mm aufweisen, vorteilhaft in einem Bereich zwischen 5 und 10mm liegen. Die innere Schicht sollte zwar dicker sein als die äußere, insgesamt kann sie in einem Bereich von etwa 5 bis 50mm liegen, vorteilhaft 10 bis 30mm. Dies bedeutet, dass die innere Schicht allgemein in etwa zwei bis fünfmal so dick sein kann wie die äußere. Die absoluten Dicken sind selbstverständlich auch vom Gesamtdurchmesser der Walze abhängig.In addition to the different hardness of the layers, the thickness can and should be different. The outer layer should be thinner than the inner layer, for example, have a thickness of 3 to 15mm, advantageously in a range between 5 and 10mm. Although the inner layer should be thicker than the outer, it can be in a range of about 5 to 50 mm, advantageously 10 to 30 mm. This means that the inner layer can generally be about two to five times as thick as the outer one. Of course, the absolute thicknesses are also dependent on the overall diameter of the roller.

Für den tragenden Aufbau der Walze ist vorteilhaft ein Metallkern oder Metallkörper vorgesehen, auf welchen der Schichtaufbau aufgebracht ist. Dabei kann zwischen tragendem Kern und der inneren weichen Schicht noch eine Zwischenschicht vorgesehen sein. Auch diese Zwischenschicht kann aus Gummi bestehen. Eine Anpassung der Materialeigenschaften zwischen hartem Metall und relativ weicher innerer Schicht wird besonders dann vorteilhaft durch die Zwischenschicht erreicht, wenn ihre Härte über derjenigen der weichen inneren Schicht liegt. Beispielsweise kann sie in etwa in dem Bereich der Härte der äu-βeren Schicht liegen, wodurch vorteilhaft die Anzahl der benötigten Materialien für die Schichtherstellung gering gehalten werden kann. Die Zwischenschicht kann auch dünner sein als die weiche innere Schicht, da sie lediglich für die Anpassung der inneren Schicht an den Stahlkern oder Stahlkörper vorgesehen ist, nicht jedoch zur Beeinflussung der Gesamt-Eigenschaften der Walze hinsichtlich Flexibilität oder dergleichen.For the supporting structure of the roller, a metal core or metal body is advantageously provided, on which the layer structure is applied. In this case, an intermediate layer may be provided between the supporting core and the inner soft layer. This intermediate layer may also be made of rubber. An adaptation of the material properties between hard metal and relatively soft inner layer is particularly advantageously achieved by the intermediate layer when its hardness is higher than that of the soft inner layer. For example, it may be approximately in the range of the hardness of the outer Layer, whereby advantageously the number of required materials for the layer production can be kept low. The intermediate layer may also be thinner than the soft inner layer, since it is intended only for the adaptation of the inner layer to the steel core or steel body, but not for influencing the overall properties of the roll in terms of flexibility or the like.

Die Schichten werden nacheinander auf die Walze oder den Kern aufgebracht. Ein Gummimaterial wird vorteilhaft auf die darunterliegende Schicht aufvulkanisiert. So lassen sich insbesondere bei Verbindungen von Gummi zu Gummi wie auch zu Metall besonders haltbare Verbände schaffen.The layers are applied successively to the roll or core. A rubber material is advantageously vulcanized onto the underlying layer. This makes it possible to create particularly durable bandages, especially in the case of compounds from rubber to rubber as well as to metal.

Eine vorbeschriebene Walze wird erfindungsgemäß besonders vorteilhaft bei der Entwässerung der für die Herstellung von Papier, Karton und Zellstoff benötigten Aufschlämmung von Faserstoffen verwendet, vorzugsweise von Tissue-Material, Papierstoff oder papierähnlichem Material. Vor allem bei diesen weichen Materialien kommt die Flexibilität der Walze zum Tragen bei gleichzeitiger erhöhter Verschleißfestigkeit und besserer Qualität der erzeugten Bahnmaterialien. Auch andere Anwendungen für eine solche Walze sind denkbar, beispielsweise bei Papier, Karton oder dergleichen.A roll as described above is particularly advantageously used in the dewatering of the pulps of fibrous material required for the manufacture of paper, board and pulp, preferably tissue, paper pulp or paper-like material. Especially with these soft materials, the flexibility of the roll comes into play, while at the same time increasing wear resistance and improving the quality of the web materials produced. Other applications for such a roller are conceivable, for example in paper, cardboard or the like.

Diese und weitere Merkmale gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei einer Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird. Die Unterteilung der Anmeldung in einzelne Abschnitte sowie Zwischen-Überschriften beschränken die unter diesen gemachten Aussagen nicht in ihrer Allgemeingültigkeit.These and other features will become apparent from the claims but also from the description and drawings, wherein the individual features each alone or more in the form of sub-combinations in an embodiment of the invention and in other fields be realized and advantageous and protectable Represent embodiments for which protection is claimed here. The subdivision of the application into individual sections as well as intermediate headings does not restrict the general validity of the statements made thereunder.

Kurzbeschreibung der ZeichnungenBrief description of the drawings

Ausführungsbeispiele der Erfindung sind in den Zeichnungen schematisch dargestellt und werden im folgenden näher erläutert. In den Zeichnungen zeigen:

  • Fig. 1 einen Schnitt durch eine Walze mit drei Schichten und Bohrungen in der äußeren Schicht und
  • Fig. 2 zwei verschiedene Ausbildungen der Oberfläche der äußeren Schicht mit Bohrungen und Rillen.
Embodiments of the invention are shown schematically in the drawings and will be explained in more detail below. In the drawings show:
  • 1 shows a section through a roller with three layers and holes in the outer layer and
  • Fig. 2 shows two different configurations of the surface of the outer layer with holes and grooves.

Detaillierte Beschreibung der AusführungsbeispieleDetailed description of the embodiments

In Fig. 1 ist eine Walze 11 im Schnitt dargestellt. Sie kann beispielsweise in einem Presswerk eingesetzt werden bei der Herstellung von Tissue-Material, relativ weichem Papier oder auch Karton, für die bei der Herstellung von Papier, Karton und Zellstoff benötigten Aufschlämmung von Faserstoffen.In Fig. 1, a roller 11 is shown in section. For example, it can be used in a press shop to produce tissue material, relatively soft paper or even board, for the pulp needed for the production of paper, board and pulp.

Auf einen Stahlkern 13, der beliebig ausgebildet sein kann und an seinen nicht dargestellten Enden Wellenenden zur Lagerung aufweist, ist zuerst eine Zwischenschicht 15 aufgebracht. Sie weist eine Dicke von mehreren Millimetern auf und besteht aus Vollgummi. Auf die Zwischenschicht 15 ist die innere Schicht 20 aufgebracht durch Vulkanisieren. Sie weist eine Dicke von etwa 15mm auf. Auf die innere Schicht 20 wiederum ist die äußere Schicht 30 aufvulkanisiert mit einer Dicke von etwa 5mm. Anstelle Gummi könnte als Material hier auch Polyurethan verwendet werden.On a steel core 13, which may be of any design and having at its ends not shown shaft ends for storage, an intermediate layer 15 is first applied. It has a thickness of several millimeters and is made of solid rubber. On the intermediate layer 15, the inner layer 20 is applied by vulcanization. It has a thickness of about 15mm. On the inner layer 20, in turn, the outer layer 30 is vulcanized with a thickness of about 5mm. Instead of rubber could be used as a material here also polyurethane.

Bei dem Ausführungsbeispiel bestehen sämtliche Schichten 15, 20 und 30 aus Vollgummi. Die Härten der Zwischenschicht 15 und der äußeren Schicht 30 liegen bei etwa 95° Shore A. Die Härte der weichen inneren Schicht 20 liegt bei etwa 70° Shore A.In the embodiment, all layers 15, 20 and 30 are made of solid rubber. The hardnesses of the intermediate layer 15 and the outer Layer 30 is at about 95 ° shore A. The hardness of the soft inner layer 20 is about 70 ° Shore A.

Es ist zu erkennen, dass die äußere Schicht 30 Bohrungen 32 und Rillen 34 aufweist. Diese reichen zwar bis zur Zwischenschicht 20, dringen jedoch nicht in diese ein.It can be seen that the outer layer 30 bores 32 and grooves 34 has. Although these extend to the intermediate layer 20, but do not penetrate into this.

In der Draufsicht auf die Walze 11 nach Fig. 2 ist zu erkennen, wie die verteilten Bohrungen 32 und Rillen 34 aussehen können. Selbstverständlich sind hier auch andere Verteilungen möglich, beispielsweise bereichsweise nur Bohrungen oder nur Rillen. Bevorzugt wird jedoch eine über die gesamte Oberfläche der Walze 11 gleichmäßig ausgebildete Strukturierung der Bohrungen 32 bzw. Rillen 34. Die Bohrungen können einen Durchmesser von 1 bis 6 mm aufweisen. Blindbohrungen können 4 bis 200 mm tief sein. Die Rillen können eine Breite von 0,4 bis 2 mm aufweisen und 1 bis 5 mm tief sein. Die Stegbreite kann 1 bis 4 mm betragen.In the plan view of the roller 11 of FIG. 2 can be seen how the distributed holes 32 and grooves 34 may look like. Of course, other distributions are possible here, for example, only holes or grooves only partially. However, a structuring of the bores 32 or grooves 34 that is uniform over the entire surface of the roller 11 is preferred. The bores may have a diameter of 1 to 6 mm. Blind holes can be 4 to 200 mm deep. The grooves may have a width of 0.4 to 2 mm and be 1 to 5 mm deep. The web width can be 1 to 4 mm.

Bei der Verwendung einer solchen Walze 11 zur Herstellung von beispielsweise Tissue-Material stehen also einerseits die Vorteile einer eher weichen und nachgiebigen Walze zur Verfügung, insbesondere wegen des vorgenannten breiteren Nips aufgrund der Nachgiebigkeit des Gesamtbelags der Walze 11. Dies ist insbesondere bei dem weichen und relativ voluminösen bzw. dicken Tissue-Material vorteilhaft. Andererseits wird durch die äußere Schicht 30 der entstehende Verschleiß begrenzt. Auch die während des Betriebs wichtigen Bohrungen 32 und Rillen 34 sind dadurch besser definierbar bzw. vorherbestimmbar, dass sie in die äußere harte Schicht 30 eingebracht werden.When using such a roller 11 for the production of, for example, tissue material, on the one hand, the advantages of a rather soft and flexible roller are available, in particular because of the aforementioned wider nip due to the resilience of the overall covering of the roller 11. This is especially true for the soft and relatively bulky or thick tissue material advantageous. On the other hand, is limited by the outer layer 30 of the resulting wear. The important during operation holes 32 and grooves 34 are thereby better defined or predictable that they are introduced into the outer hard layer 30.

Claims (13)

Walze (11) für die Entwässerung der für die Herstellung von Papier, Karton und Zellstoff benötigten Aufschlämmung von Faserstoffen, vorzugsweise von Papierstoff oder papierähnlichem Material, wobei die Walze (11) mehrere Schichten (15, 20, 30) aufweist, wobei auf eine relativ weiche innere Schicht (20) eine relativ harte und verschleißfeste äußere Schicht (30) aufgebracht ist, wobei die innere Schicht (20) und die äußere Schicht (30) aus Vollmaterial ohne Lufteinschlüsse bestehen.Roller (11) for dewatering the slurry of fibrous materials, preferably paper stock or paper-like material, required for the production of paper, board and pulp, the roller (11) having a plurality of layers (15, 20, 30), wherein a relative soft inner layer (20) is a relatively hard and wear-resistant outer layer (30) is applied, wherein the inner layer (20) and the outer layer (30) made of solid material without air pockets. Walze nach Anspruch 1, dadurch gekennzeichnet, dass die äußere Schicht (30) Bohrungen (32) und/oder Vertiefungen (34) aufweist, vorzugsweise mit einem Durchmesser von 1 bis 6 mm und/oder bei Blindbohrungen einer Tiefe von 4 bis 20 mm.Roller according to claim 1, characterized in that the outer layer (30) has bores (32) and / or recesses (34), preferably with a diameter of 1 to 6 mm and / or blind holes of a depth of 4 to 20 mm. Walze nach Anspruch 2, dadurch gekennzeichnet, dass die Vertiefungen in Form von Rillen (34) vorliegen, vorzugsweise schräg zur Durchlaufrichtung des Bahnmaterials, wobei insbesondere die Rillen (34) 0,4 bis 2 mm breit sind und/oder 1 bis 5 mm tief sind, wobei vorzugsweise eine Stegbreite 1 bis 4 mm beträgt.Roller according to claim 2, characterized in that the depressions in the form of grooves (34) are present, preferably obliquely to the direction of passage of the web material, in particular the grooves (34) are 0.4 to 2 mm wide and / or 1 to 5 mm deep are, preferably a web width is 1 to 4 mm. Walze nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die innere Schicht (20) frei ist von Bohrungen (32) und/oder Vertiefungen, wobei vorzugsweise Vertiefungen in Form von Rillen (34) ganz durch die äußere Schicht (30) gehen.Roller according to claim 2 or 3, characterized in that the inner layer (20) is free of bores (32) and / or depressions, wherein depressions in the form of grooves (34) preferably pass completely through the outer layer (30). Walze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest die äußere Schicht (30) aus einem Material der folgenden Gruppe besteht: Kautschuk, Gummi, Polyurethan, vorzugsweise aus Vollgummi, wobei insbesondere die innere Schicht (20) aus demselben Material besteht wie die äußere Schicht (30).Roll according to one of the preceding claims, characterized in that at least the outer layer (30) consists of a material of the following group: rubber, rubber, polyurethane, preferably of solid rubber, in particular the inner Layer (20) consists of the same material as the outer layer (30). Walze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die äußere Schicht (30) eine Härte von 80° bis 100° Shore A aufweist, insbesondere von 90° bis 98° Shore A.Roller according to one of the preceding claims, characterized in that the outer layer (30) has a hardness of 80 ° to 100 ° Shore A, in particular from 90 ° to 98 ° Shore A. Walze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die innere Schicht (20) eine Härte von 40° bis 90° Shore A aufweist, vorzugsweise von 60° bis 85° Shore A.Roller according to one of the preceding claims, characterized in that the inner layer (20) has a hardness of 40 ° to 90 ° Shore A, preferably from 60 ° to 85 ° Shore A. Walze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die äußere Schicht (30) eine Dicke von 2 bis 20 mm aufweist, vorzugsweise von 5 bis 10 mm.Roller according to one of the preceding claims, characterized in that the outer layer (30) has a thickness of 2 to 20 mm, preferably from 5 to 10 mm. Walze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die innere Schicht (20) eine Dicke von 5 bis 50 mm aufweist, vorzugsweise 10 bis 20 mm.Roller according to one of the preceding claims, characterized in that the inner layer (20) has a thickness of 5 to 50 mm, preferably 10 to 20 mm. Walze nach einem der vorhergehenden Ansprüche, gekennzeichnet durch einen inneren Metallkern (13) oder Metallkörper, der den Schichtaufbau trägt, wobei vorzugsweise zwischen Kern (13) und innerer Schicht (20) eine Zwischenschicht (15) vorgesehen ist, die insbesondere aus Gummi besteht.Roller according to one of the preceding claims, characterized by an inner metal core (13) or metal body, which carries the layer structure, wherein preferably between the core (13) and inner layer (20) an intermediate layer (15) is provided, which consists in particular of rubber. Walze nach Anspruch 10, dadurch gekennzeichnet, dass die Zwischenschicht (15) eine Shore-Härte über derjenigen der inneren Schicht (20) aufweist, wobei vorzugsweise die Zwischenschicht dünner ist als die innere Schicht.Roller according to claim 10, characterized in that the intermediate layer (15) has a Shore hardness higher than that of the inner layer (20), wherein preferably the intermediate layer is thinner than the inner layer. Walze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schichten (15, 20, 30) zusammenvulkanisiert sind.Roller according to one of the preceding claims, characterized in that the layers (15, 20, 30) are vulcanized together. Verwendung einer Walze (11) nach einem der vorhergehenden Ansprüche bei der Herstellung von dünnem Bahnmaterial, vorzugsweise Tissue-Material, Papierstoff oder papierähnlichem Material, vorzugsweise bei der Entwässerung der für die Herstellung von Papier, Karton und Zellstoff benötigten Aufschlämmung von Faserstoffen.Use of a roller (11) according to any one of the preceding claims in the manufacture of thin web material, preferably tissue material, paper stock or paper-like material, preferably in the dewatering of the pulp slurry needed for the manufacture of paper, board and pulp.
EP05025312A 2004-11-19 2005-11-19 Roll for the production of a web, in particular for the dewatering of pulp Active EP1659216B1 (en)

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DE102004057480A DE102004057480A1 (en) 2004-11-19 2004-11-19 Roller for the production of web material, preferably tissue material

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DE102009028215B3 (en) 2009-08-04 2010-09-09 Voith Patent Gmbh Combination of a press felt with a press roll cover and / or a suction roll cover for a paper machine
DE102010013123A1 (en) 2010-03-26 2011-09-29 SchäferRolls GmbH & Co. KG Use of multi-layered built-in roll comprising a soft inner layer and a relatively hard and wear-resistant outer layer, as a coating roll, a glue roll or as a film press roll for surface finishing of paper, cardboard and pulp
DE202011001325U1 (en) 2011-01-11 2011-03-10 Shw Casting Technologies Gmbh Drying cylinder for a tissue paper machine
EP2511418B1 (en) 2011-04-12 2017-07-26 SchäferRolls GmbH & Co. KG Use of a multi-layer roller
DE102011077721A1 (en) 2011-06-17 2012-12-20 SchäferRolls GmbH & Co. KG Roller, particularly for paper handling as calendar roller, has outer coating that is comprised of fibers embedded in embedding material, like adhesive or resin, where part of fibers has polyacrylonitrile material as homopolymer
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Also Published As

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ATE388270T1 (en) 2008-03-15
EP1659216B1 (en) 2008-03-05
DE502005003076D1 (en) 2008-04-17
DE102004057480A1 (en) 2006-05-24

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