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 PDFInfo
- 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
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- roller
- inner layer
- roller according
- outer layer
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 17
- 239000005060 rubber Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000002657 fibrous material Substances 0.000 claims description 2
- 239000013055 pulp slurry Substances 0.000 claims description 2
- 239000011343 solid material Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 abstract 1
- 235000019589 hardness Nutrition 0.000 description 11
- 239000000123 paper Substances 0.000 description 7
- 239000011111 cardboard Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Images
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
- 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.
Landscapes
- Paper (AREA)
Abstract
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.
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
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.
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.
- 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.
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
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
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
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
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
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
Claims (13)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004057480A DE102004057480A1 (en) | 2004-11-19 | 2004-11-19 | Roller for the production of web material, preferably tissue material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1659216A1 true EP1659216A1 (en) | 2006-05-24 |
EP1659216B1 EP1659216B1 (en) | 2008-03-05 |
Family
ID=36000791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05025312A Active EP1659216B1 (en) | 2004-11-19 | 2005-11-19 | Roll for the production of a web, in particular for the dewatering of pulp |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1659216B1 (en) |
AT (1) | ATE388270T1 (en) |
DE (2) | DE102004057480A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2447416A1 (en) * | 2010-10-28 | 2012-05-02 | Metso Paper Inc. | Elastic coating for a rotating press element of a fibre web machine |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008011498A1 (en) | 2008-02-25 | 2009-08-27 | Schäfer Composites GmbH | Roller i.e. calendar roller, for treating coated paper, has outer lining provided with fibers, where part of fibers has same material as that of embedding-material or material with similar characteristics with respect to abrasion resistance |
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 |
DE102016114013A1 (en) * | 2016-07-29 | 2018-02-01 | Voith Patent Gmbh | Roll cover and roller and their use |
Citations (4)
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GB233523A (en) * | 1924-05-20 | 1925-05-14 | Frank Reddaway | Improvements in the press rolls of paper making machines |
DE2050626A1 (en) * | 1968-12-18 | 1972-05-04 | Beloit Corp., Beloit, Wis. (V.St.A.) | Calender roll construction |
US5176940A (en) * | 1989-02-28 | 1993-01-05 | Valmet Paper Machinery Inc. | Method for forming a coated roll |
DE19506301A1 (en) * | 1995-02-23 | 1996-08-29 | Voith Sulzer Finishing Gmbh | Calender for paper webs |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI890953A (en) * | 1989-02-28 | 1990-08-29 | Valmet Paper Machinery Inc | VALS ELLER VALSBELAEGGNING I CELLULOSAMASKIN, PAPPERSMASKIN ELLER EFTERBEHANDLINGSMASKIN FOER PAPPER OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA SAMT ANVAENDNING AV DENNA. |
DE4340724A1 (en) * | 1993-11-30 | 1995-06-01 | Sigri Great Lakes Carbon Gmbh | Fiber-reinforced plastic roller with diamond pattern |
-
2004
- 2004-11-19 DE DE102004057480A patent/DE102004057480A1/en not_active Withdrawn
-
2005
- 2005-11-19 DE DE502005003076T patent/DE502005003076D1/en active Active
- 2005-11-19 EP EP05025312A patent/EP1659216B1/en active Active
- 2005-11-19 AT AT05025312T patent/ATE388270T1/en active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB233523A (en) * | 1924-05-20 | 1925-05-14 | Frank Reddaway | Improvements in the press rolls of paper making machines |
DE2050626A1 (en) * | 1968-12-18 | 1972-05-04 | Beloit Corp., Beloit, Wis. (V.St.A.) | Calender roll construction |
US5176940A (en) * | 1989-02-28 | 1993-01-05 | Valmet Paper Machinery Inc. | Method for forming a coated roll |
DE19506301A1 (en) * | 1995-02-23 | 1996-08-29 | Voith Sulzer Finishing Gmbh | Calender for paper webs |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2447416A1 (en) * | 2010-10-28 | 2012-05-02 | Metso Paper Inc. | Elastic coating for a rotating press element of a fibre web machine |
CN102535231A (en) * | 2010-10-28 | 2012-07-04 | 美卓造纸机械公司 | Method for improving vibration restoration, coating, press element, and restoring method |
CN102535231B (en) * | 2010-10-28 | 2014-10-01 | 维美德技术有限公司 | Method for improving vibration restoration, coating, press element, and restoring method |
Also Published As
Publication number | Publication date |
---|---|
ATE388270T1 (en) | 2008-03-15 |
EP1659216B1 (en) | 2008-03-05 |
DE502005003076D1 (en) | 2008-04-17 |
DE102004057480A1 (en) | 2006-05-24 |
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