EP0578972B1 - Process for making a roll having a resilent covering - Google Patents
Process for making a roll having a resilent covering Download PDFInfo
- Publication number
- EP0578972B1 EP0578972B1 EP93109352A EP93109352A EP0578972B1 EP 0578972 B1 EP0578972 B1 EP 0578972B1 EP 93109352 A EP93109352 A EP 93109352A EP 93109352 A EP93109352 A EP 93109352A EP 0578972 B1 EP0578972 B1 EP 0578972B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plastic
- process according
- crosslinking
- approximately
- roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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
- D21G1/024—Soft rolls formed from a plurality of compacted disc elements or from a spirally-wound band
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49544—Roller making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49544—Roller making
- Y10T29/49547—Assembling preformed components
- Y10T29/49549—Work contacting surface element assembled to core
- Y10T29/49554—Work contacting surface having annular axial sections
Definitions
- the invention relates to a method for producing a roller with elastic cover, in which ring disks made of a sheet-like fiber material are pushed on and axially pressed together, and in which the fiber material is provided with a plastic and this is cured, a part of which up to Curing required crosslinking takes place during a ripening period after the start of compression.
- Such a method is known from DE-PS 10 71 036.
- the aim is to obtain particularly good roller coverings by welding the individually applied disks together to form a uniform block before use.
- nonwoven discs are used in which the binder, for example latex, has not yet been fully vulcanized. These disks are stacked on the roller core and pressed together. In this state, the roller is exposed to heat for a long time, and the partially vulcanized binder is finally vulcanized.
- the heat treatment is running at temperatures from 120 ° C and 115 ° C according to exemplary embodiments and according to the patent claim should preferably be above 100 ° C.
- the duration of the longer treatment is in the hour range, namely 8 or 5 hours according to the exemplary embodiment.
- Covered rollers are also used in super calenders and compact calenders and are used to smooth web-like material such as paper, non-woven, magnetic tape, textile fabric and the like.
- the covers must be able to withstand higher loads.
- the fiber material consists primarily of cellulose fibers.
- the European standard cover for elastic calender rolls has 80% cotton and 20% wool.
- roll covers that contain up to 50% asbestos fibers or up to 15% carbon fibers.
- the properties of the roller depend on the mixing ratio. If, for example, by increasing the proportion of animal wool, resistance to marking by folding and the like in the continuous web material is to be improved, due to the higher hysteresis caused by this type of fiber and the strong heating associated with it, the mechanical load capacity is reduced at the same time, so that operation under high loads, i.e. higher machine speeds and higher line loads, is no longer possible.
- Temperature resistance also plays a role, because heat develops in relation to hysteresis in some cases, the elastic rollers interact with heated rollers.
- a method mentioned at the outset is known from US Pat. No. 2,987,802 A, in which the pulp from which the fibrous material is produced in a paper machine is mixed with a thermosetting plastic which, before the ring disks are cut out, for six to ten minutes 290 to 300 ° C is cured.
- the invention has for its object to provide an elastic cover that is heavy-duty and still resistant to marking.
- crosslinking takes place essentially at ambient temperature, that is to say there are no significant crosslinking reactions due to heating. There are therefore no significant temperature differences during crosslinking, which lead to different reactions and therefore different material properties, which can later form the starting point for cracks and other damage.
- Another advantage is that no heating device is required for curing, but that only the maturing time has to be waited for in the case of the roller which is otherwise finished.
- the crosslinking rate can be adjusted by selecting the type and amount of the hardener additive.
- the choice is to be made such that there is sufficient time for the production of the fiber material mixed with plastic, for punching out the ring disks and for stacking and pressing together, without the crosslinking process having progressed so far that the desired crosslinking between adjacent ring disks only still incomplete. For this reason, you have to set a correspondingly long ripening time. In particular, most of the networking or even at least 75% of the total networking should take place during the maturation period.
- the ripening time should be at least one week.
- the entire crosslinking can preferably be completed after about two to four weeks.
- the simplest type of production is that the fiber material is made from fiber pulp in a paper machine and the plastic is added to this fiber pulp.
- the fact that the plastic begins to crosslink in the pulp is permissible due to the low crosslinking speed.
- a web is preferably produced from the fiber pulp and this is dried by briefly heating to about 100 ° C. to a residual moisture which enables further processing.
- the sheet-like fiber material is impregnated with the plastic. This reduces the portion of the crosslinking time before the compression.
- the amount of plastic is preferably about 5 to 40% of the amount of fibers, in particular about 20 to 30% of the amount of fibers.
- a water-dispersible epoxy system with a slow hardener is particularly recommended.
- a polyaminoamine is particularly suitable as a slow hardener.
- a roller produced by the method according to the invention has an elastic cover which is formed by a homogeneous body which consists of fibers and a uniformly hardened plastic.
- This plastic should in particular be an epoxy system hardened with polyaminoamine.
- the roller 1 of FIG. 1 has a core 2 made of steel, which can be supported at its outer ends 3 and 4.
- An elastic cover 5 consists of a plurality of washers 6 made of fiber material. These are located between two pressure rings 7 and 8, which can be moved against one another with the aid of clamping nuts 9 and 10.
- the washers 6 each have a cutout 11 which interacts with an axially extending strip on the core 2 and in this way prevents rotation of the cover 5.
- the annular discs 6 are punched out of a web material which has been produced on a conventional paper machine. They mainly consist of fibers, primarily cotton fibers. However, these can also be mixed with other fibers, such as plastic fibers, mineral fibers, carbon fibers or animal wool fibers. By mixing the cotton fibers with plastic or mineral fibers, the elastic deformation area is increased and thus the resilience when running through folds and paper chunks is increased.
- the ring discs can also consist of a plastic fleece or plastic paper without cotton fibers.
- the washers contain 5 to 40% of the amount of fiber in plastic.
- This plastic has been added to the pulp in the paper machine. It is a cold-curing plastic, the hardener component is selected so that the crosslinking rate is so slow that the complete curing takes place after a few days or weeks. Therefore, the plastic contained in the ring disks 6, when the ring disks are layered on the core 2 and then pressed together, is still in the initial study of crosslinking.
- a suitable plastic is one with polyaminoamine water dispersible epoxy system added as a slow hardener.
- the roller In order to obtain the desired final state of the roller, after the ring disks 6 have been pressed together on the core 2, nothing else is required but to wait for the maturing time, which can be measured in days or weeks. Then the roller has a homogeneous elastic cover that is suitable for high speeds and pressures and has a high marking resistance.
- the elastic cover 105 is placed on a core 102 designed as a hollow roller. It is axially compressed again by pressure rings 107 by means of clamping nuts 109.
- the core 102 is mounted on a support 113 via bearings 112 and can additionally be supported by hydrostatic support elements 114 which act on the inner circumferential surface of the roll shell.
- the carrier 113 is held in fixed bearings 115.
- the range of the ambient temperature primarily covers the room temperature as it prevails in the interior, but should not rule out that the roller can also be exposed to outside temperatures.
Landscapes
- Paper (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Vibration Dampers (AREA)
- Building Environments (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Control Of El Displays (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zum Herstellen einer Walze mit elastischem Bezug, bei dem auf einem Kern Ringscheiben aus einem blattförmigen Fasermaterial aufgeschoben und axial zusammengepreßt werden und bei dem das Fasermaterial mit einem Kunststoff versehen und dieser ausgehärtet wird, wobei ein Teil der bis zur Aushärtung erforderlichen Vernetzung während einer nach dem Beginn des Zusammenpressens liegenden Reifezeit erfolgt.The invention relates to a method for producing a roller with elastic cover, in which ring disks made of a sheet-like fiber material are pushed on and axially pressed together, and in which the fiber material is provided with a plastic and this is cured, a part of which up to Curing required crosslinking takes place during a ripening period after the start of compression.
Ein solches Verfahren ist aus DE-PS 10 71 036 bekannt. Man will besonders gute Walzenbeläge dadurch erhalten, daß die einzeln aufgebrachten Scheiben vor Ingebrauchnahme zu einem einheitlichen Block miteinander verschweißt werden. Zu diesem Zweck verwendet man Vliesstoffscheiben, in denen das Bindemittel, beispielsweise Latex, noch nicht völlig ausvulkanisiert ist. Diese Scheiben werden auf den Walzenkern aufgeschichtet und stark zusammengedrückt. In diesem Zustand wird die Walze längere Zeit der Einwirkung von Wärme ausgesetzt, wobei das bereits teilweise vulkanisierte Bindemittel zu Ende vulkanisiert wird. Die Wärmebehandlung läuft bei Temperaturen ab, die gemäß Ausführungsbeispielen 120°C und 115°C betragen und laut Patentanspruch vorzugsweise über 100°C liegen sollen. Die Dauer der längeren Behandlung liegt im Stundenbereich, nämlich laut Ausführungsbeispiel bei 8 oder 5 Stunden. Auf diese Weise erhält man einen Walzenbezug, der Härte von 90, 96 oder 97° Shore A hat. Ein solcher Bezug ist für das Abquetschen von Flüssigkeiten aus Textilien, Leder u. dgl. oder als Gegenwalze für Prägezwecke, geeignet. Ein ähnliches Verfahren ist auch aus US-A-5 097 596 bekannt.Such a method is known from DE-PS 10 71 036. The aim is to obtain particularly good roller coverings by welding the individually applied disks together to form a uniform block before use. For this purpose, nonwoven discs are used in which the binder, for example latex, has not yet been fully vulcanized. These disks are stacked on the roller core and pressed together. In this state, the roller is exposed to heat for a long time, and the partially vulcanized binder is finally vulcanized. The heat treatment is running at temperatures from 120 ° C and 115 ° C according to exemplary embodiments and according to the patent claim should preferably be above 100 ° C. The duration of the longer treatment is in the hour range, namely 8 or 5 hours according to the exemplary embodiment. In this way you get a roll cover that has a hardness of 90, 96 or 97 ° Shore A. Such a cover is for squeezing liquids from textiles, leather and the like. Like. Or as a counter roll for embossing purposes, suitable. A similar process is also known from US-A-5 097 596.
Mit einem Bezug versehene Walzen werden auch in Superkalandern und Kompaktkalandern eingesetzt und dienen dem Glätten von bahnförmigem Material, wie Papier, Vlies, Magnetband, Textilgewebe u.dgl. Als Kern dient ein Schaft oder ein Hohlzylinder, der insbesondere aus Grauguß oder Stahl besteht. Bei diesem Anwendungszweck müssen die Bezüge aber höher belastbar sein.Covered rollers are also used in super calenders and compact calenders and are used to smooth web-like material such as paper, non-woven, magnetic tape, textile fabric and the like. A shaft or a hollow cylinder, which consists in particular of gray cast iron or steel, serves as the core. For this application, however, the covers must be able to withstand higher loads.
Aus EP 0 131 083 B1 ist es bekannt, daß das Fasermaterial vornehmlich aus Zellstoffasern besteht. Beispielsweise weist der europäische Standardbezug für elastische Kalanderwalzen 80 % Baumwolle und 20 % Wolle auf. Es gibt auch Walzenbezüge, die bis zu 50 % Asbestfasern oder bis zu 15 % Kohlenstoffasern enthalten. Die Eigenschaften der Walze hängen vom Mischungsverhältnis ab. Wenn beispielsweise durch Erhöhung des Anteils an tierischer Wolle die Resistenz gegen Markierungen durch Falten u.dgl. im durchlaufenden Bahnmaterial verbessert werden soll, verringert sich aufgrund der durch diese Faserart bedingte höhere Hysterese und der mit ihr verbundenen starken Aufheizung gleichzeitig die mechanische Belastbarkeit, so daß ein Betrieb bei hoher Belastung, also höheren Maschinengeschwindigkeiten und höheren Streckenlasten, nicht mehr möglich ist.From EP 0 131 083 B1 it is known that the fiber material consists primarily of cellulose fibers. For example, the European standard cover for elastic calender rolls has 80% cotton and 20% wool. There are also roll covers that contain up to 50% asbestos fibers or up to 15% carbon fibers. The properties of the roller depend on the mixing ratio. If, for example, by increasing the proportion of animal wool, resistance to marking by folding and the like in the continuous web material is to be improved, due to the higher hysteresis caused by this type of fiber and the strong heating associated with it, the mechanical load capacity is reduced at the same time, so that operation under high loads, i.e. higher machine speeds and higher line loads, is no longer possible.
Auch die Temperaturbeständigkeit spielt eine Rolle, weil sich im Bezug durch Hysterese Wärme entwickelt und in manchen Fällen die elastischen Walzen mit beheizten Walzen zusammenwirken. In diesem Zusammenhang ist aus US 2 987 802 A ein eingangs erwähntes Verfahren bekannt, bei dem der Faserbrei, aus dem das Fasermaterial in einer Papiermaschine hergestellt wird, mit einem warmhärtenden Kunststoff versetzt wird, der vor dem Ausschneiden der Ringscheiben während sechs bis zehn Minuten bei 290 bis 300 °C ausgehärtet wird.Temperature resistance also plays a role, because heat develops in relation to hysteresis in some cases, the elastic rollers interact with heated rollers. In this connection, a method mentioned at the outset is known from US Pat. No. 2,987,802 A, in which the pulp from which the fibrous material is produced in a paper machine is mixed with a thermosetting plastic which, before the ring disks are cut out, for six to ten minutes 290 to 300 ° C is cured.
Der Erfindung liegt die Aufgabe zugrunde, einen elastischen Bezug zu schaffen, der hochbelastbar und trotzdem markierungsresistent ist.The invention has for its object to provide an elastic cover that is heavy-duty and still resistant to marking.
Diese Aufgabe wird erfindungsgemäß bei dem eingangs beschriebenen Verfahren dadurch gelöst, daß der Kunststoff im wesentlichen ohne Beheizung vernetzt wird und dabei eine so geringe Vernetzungsgeschwindigkeit besitzt, daß die Reifezeit mindestens zwei Tage beträgt.This object is achieved according to the invention in the method described in the introduction in that the plastic is crosslinked essentially without heating and has such a low crosslinking rate that the ripening time is at least two days.
Wesentlich ist hierbei, daß die Vernetzung im wesentlichen bei Umgebungstemperatur abläuft, also keine erheblichen Vernetzungsreaktionen aufgrund einer Beheizung erfolgen. Während des Vernetzens treten daher keine nennenswerten Temperaturunterschiede auf, die zu unterschiedlichen Reaktionen und daher unterschiedlichen Materialeigenschaften führen, was später den Ausgangspunkt von Rissen und anderen Schäden bilden kann. Ein weiterer Vorteil besteht darin, daß zum Aushärten keine Heizvorrichtung erforderlich ist, sondern daß bei der im übrigen fertiggestellten Walze lediglich die Reifezeit abgewartet werden muß.It is important here that the crosslinking takes place essentially at ambient temperature, that is to say there are no significant crosslinking reactions due to heating. There are therefore no significant temperature differences during crosslinking, which lead to different reactions and therefore different material properties, which can later form the starting point for cracks and other damage. Another advantage is that no heating device is required for curing, but that only the maturing time has to be waited for in the case of the roller which is otherwise finished.
In der Praxis vergeht zwischen dem Aufbringen des Kunststoffes auf das Fasermaterial und dem Beginn der Walzenherstellung eine gewisse Zeit. Wegen der geringen Vernetzungsgeschwindigkeit ist zum Zeitpunkt des Zusammenpressens der Ringscheiben erst ein Bruchteil der gesamten Vernetzungsreaktionen abgelaufen. Der weitere Vernetzungsvorgang findet nicht nur innerhalb der Ringscheiben, sondern auch zwischen den unter hohem Druck aufeinander gepreßten Oberflächen benachbarter Ringscheiben statt. Nach der vorgesehenen Reifezeit ergibt sich ein homogener Bezugskörper, der die für hohe Beanspruchungen ausreichende Härte und Elastizität besitzt und aufgrund seiner Homogenität in der Lage ist, auch die hohen betriebsbedingten Überbelastungen elastisch aufzunehmen, d.h. ohne die bei herkömmlichen Walzenbezügen hierbei verursachten partiellen Stauchungen, Knickungen und Ringscheibenverschiebungen. Dadurch wird eine sehr gute Markierungsresistenz erzielt.In practice, a certain amount of time passes between the application of the plastic to the fiber material and the start of roller production. Because of the low crosslinking speed, only a fraction of the time at the time the washers are pressed together entire crosslinking reactions expired. The further crosslinking process takes place not only within the ring disks, but also between the surfaces of adjacent ring disks pressed together under high pressure. After the intended ripening time, the result is a homogeneous cover body that has the hardness and elasticity sufficient for high loads and, due to its homogeneity, is able to absorb even the high operational overloads, i.e. without the partial upsets, kinks and so caused with conventional roller covers Disc shifts. This results in very good marking resistance.
Es ist bekannt, daß man bei kalthärtenden Kunststoffen die Vernetzungsgeschwindigkeit durch Wahl von Art und Menge des Härter-Zusatzes einstellen kann. Erfindungsgemäß ist die Wahl so zu treffen, daß für die Herstellung des mit Kunststoff versetzten Fasermaterials, für das Ausstanzen der Ringscheiben und für das Aufeinanderschichten und Zusammenpressen ausreichend Zeit bleibt, ohne daß der Vernetzungsvorgang schon soweit fortgeschritten ist, daß die angestrebte Vernetzung zwischen benachbarten Ringscheiben nur noch unvollständig erfolgt. Aus diesem Grund muß man eine entsprechend lange Reifezeit ansetzen. Insbesondere sollte während der Reifezeit der überwiegende Teil der Vernetzung oder sogar mindestens 75 % der gesamten Vernetzung erfolgen.It is known that in the case of cold-curing plastics, the crosslinking rate can be adjusted by selecting the type and amount of the hardener additive. According to the invention, the choice is to be made such that there is sufficient time for the production of the fiber material mixed with plastic, for punching out the ring disks and for stacking and pressing together, without the crosslinking process having progressed so far that the desired crosslinking between adjacent ring disks only still incomplete. For this reason, you have to set a correspondingly long ripening time. In particular, most of the networking or even at least 75% of the total networking should take place during the maturation period.
Gemäß bevorzugten Einstellungen der Vernetzungsgeschwindigkeit sollte die Reifezeit mindestens eine Woche betragen.According to preferred settings of the crosslinking rate, the ripening time should be at least one week.
Da sich die besten Ergebnisse bei einer äußerst geringen Vernetzungsgeschwindigkeit zeigten, kann die gesamte Vernetzung vorzugsweise nach etwa zwei bis vier Wochen abgeschlossen sein.Since the best results were obtained at an extremely slow crosslinking rate, the entire crosslinking can preferably be completed after about two to four weeks.
Die einfachste Art der Herstellung besteht darin, daß das Fasermaterial in einer Papiermaschine aus Faserbrei hergestellt und diesem Faserbrei der Kunststoff beigemischt wird. Daß hierbei der Kunststoff schon im Faserbrei zu vernetzen beginnt, ist wegen der geringen Vernetzungsgeschwindigkeit zulässig. Vorzugsweise wird aus dem Faserbrei eine Bahn erzeugt und diese durch Kurzzeitige Erwärmung auf etwa 100°C bis auf eine die weitere Verarbeitung ermöglichende Restfeuchte getrocknet.The simplest type of production is that the fiber material is made from fiber pulp in a paper machine and the plastic is added to this fiber pulp. The fact that the plastic begins to crosslink in the pulp is permissible due to the low crosslinking speed. A web is preferably produced from the fiber pulp and this is dried by briefly heating to about 100 ° C. to a residual moisture which enables further processing.
Eine andere Möglichkeit besteht darin, daß das blattförmige Fasermaterial mit dem Kunststoff imprägniert wird. Hierdurch vermindert sich der vor dem Zusammenpressen liegende Abschnitt der Vernetzungszeit.Another possibility is that the sheet-like fiber material is impregnated with the plastic. This reduces the portion of the crosslinking time before the compression.
Vorzugsweise beträgt die Kunststoffmenge etwa 5 bis 40 % der Fasermenge, insbesondere etwa 20 bis 30 % der Fasermenge.The amount of plastic is preferably about 5 to 40% of the amount of fibers, in particular about 20 to 30% of the amount of fibers.
Als Kunststoff empfiehlt sich insbesondere ein wasserdispergierbares Epoxy-System mit einem Langsam-Härter. Als Langsam-Härter kommt insbesondere ein Polyaminoamin in Betracht.As a plastic, a water-dispersible epoxy system with a slow hardener is particularly recommended. A polyaminoamine is particularly suitable as a slow hardener.
Eine nach dem erfindungsgemäßen Verfahren hergestellte Walze besitzt einen elastischen Bezug, der durch einen homogenen Körper gebildet ist, der aus Fasern und einem gleichmäßig ausgehärtetem Kunststoff besteht.A roller produced by the method according to the invention has an elastic cover which is formed by a homogeneous body which consists of fibers and a uniformly hardened plastic.
Dieser Kunststoff sollte insbesondere ein mit Polyaminoamin gehärtetes Epoxy-System sein.This plastic should in particular be an epoxy system hardened with polyaminoamine.
Die Erfindung wird nachstehend anhand in der Zeichnung dargestellter Ausführungsbeispiele näher erläutert. Es zeigen:
- Fig. 1
- einen Längsschnitt durch eine erfindungsgemäße hergestellte elastische Walze,
- Fig. 2
- die Draufsicht auf eine Ringscheibe und
- Fig. 3
- einen Teillängsschnitt durch eine andere Ausführungsform.
- Fig. 1
- 2 shows a longitudinal section through an elastic roller produced according to the invention,
- Fig. 2
- the top view of an annular disc and
- Fig. 3
- a partial longitudinal section through another embodiment.
Die Walze 1 der Fig. 1 besitzt einen Kern 2 aus Stahl, der an seinen äußeren Enden 3 und 4 gelagert werden kann. Ein elastischer Bezug 5 besteht aus einer Vielzahl von Ringscheiben 6 aus Fasermaterial. Diese befinden sich zwischen zwei Druckringen 7 und 8, welche mit Hilfe von Spannmuttern 9 und 10 gegeneinander bewegt werden können. Die Ringscheiben 6 weisen je einen Ausschnitt 11 auf, der mit einer axial verlaufenden Leiste am Kern 2 zusammenwirkt und auf diese Weise eine Rotation des Bezuges 5 verhindert.The roller 1 of FIG. 1 has a
Die Ringscheiben 6 sind aus einem Bahnmaterial ausgestanzt, das auf einer herkömmlichen Papiermaschine hergestellt worden ist. Sie bestehen überwiegen aus Fasern, wobei in erster Linie Baumwollfasern in Betracht kommen. Diese können aber auch mit anderen Fasern, wie Kunststoffasern, Mineralfasern, Kohlefasern oder tierischen Wollfasern versetzt sein. Durch die Mischung der Baumwollfasern mit Kunststoff- oder Mineralfasern wird der elastische Verformungsbereich vergrößert und damit das Rückstellvermögen beim Durchlaufen von Falten und Papierbatzen gesteigert. Die Ringscheiben können aber auch aus einem Kunststoffvlies oder Kunststoffpapier ohne Baumwollfasern bestehen.The
Außerdem enthalten die Ringscheiben 5 bis 40 % der Fasermenge an Kunststoff. Dieser Kunststoff ist dem Faserbrei in der Papiermaschine beigemischt worden. Es handelt sich um einen kalthärtenden Kunststoff, dessen Härter-Komponente so gewählt ist, daß sich eine so geringe Vernetzungsgeschwindigkeit ergibt, daß die vollständige Aushärtung erst nach einigen Tagen oder Wochen erfolgt. Daher befindet sich der in den Ringscheiben 6 enthaltene Kunststoff, wenn die Ringscheiben auf dem Kern 2 geschichtet und anschließend zusammengepreßt werden, noch im Anfangsstudium der Vernetzung. Ein hierfür geeigneter Kunststoff ist ein mit Polyaminoamin als Langsam-Härter versetztes wasserdispergierbares Epoxy-System.In addition, the washers contain 5 to 40% of the amount of fiber in plastic. This plastic has been added to the pulp in the paper machine. It is a cold-curing plastic, the hardener component is selected so that the crosslinking rate is so slow that the complete curing takes place after a few days or weeks. Therefore, the plastic contained in the
Um den gewünschten Endzustand der Walze zu erhalten, ist nach dem Zusammenpressen der Ringscheiben 6 auf dem Kern 2 nichts anderes erforderlich als die Reifezeit, die sich nach Tagen oder Wochen bemessen läßt, abzuwarten. Als dann besitzt die Walze einen homogenen elastischen Bezug, der für hohe Geschwindigkeiten und Drücke geeignet ist und eine hohe Markierungsresistenz besitzt.In order to obtain the desired final state of the roller, after the
Bei dem Ausführungsbeispiel der Fig. 3 ist der elastische Bezug 105 auf einem als Hohlwalze ausgebildeten Kern 102 aufgesetzt. Er wird wieder durch Druckringe 107 mittels Spannmuttern 109 axial zusammengepreßt. Der Kern 102 ist über Lager 112 auf einem Träger 113 gelagert und kann zusätzlich durch hydrostatische Stützelemente 114, die an der Innenumfangsfläche des Walzenmantels angreifen, abgestützt werden. Der Träger 113 ist in ständerfesten Lagern 115 gehalten.In the embodiment of FIG. 3, the
Der Bereich der Umgebungstemperatur deckt in erster Linie die Raumtemperatur, wie sie in Innenräumen herrscht, soll aber nicht ausschließen, daß die Walze auch Außentemperaturen ausgesetzt sein kann.The range of the ambient temperature primarily covers the room temperature as it prevails in the interior, but should not rule out that the roller can also be exposed to outside temperatures.
Claims (12)
- Process for making a roll having a resilient covering, in which ring discs of a sheet-like fibrous material are slipped on to a core and axially compressed and in which the fibrous material is provided with a plastic and the latter is cured, part of the crosslinking required for curing taking place during a maturing period after the beginning of compression, characterised in that the plastic is crosslinked substantially without heating and has such a low crosslinking rate that the maturing period is at least two days.
- Process according to claim 1, characterised in that the greater part of the crosslinking takes place during the maturing period.
- Process according to claim 1 or claim 2, characterised in that at least 75 % of the total crosslinking takes place during the maturing period.
- Process according to one of claims 1 to 3, characterised in that the maturing period is at least one week.
- Process according to one of claims 1 to 4, characterised in that crosslinking is completed after approximately two to four weeks.
- Process according to one of claims 1 to 5, characterised in that the fibrous material is produced from pulp in a paper machine and the plastic is added to this pulp.
- Process according to claim 6, characterised in that a web is produced from the pulp and is dried to a residual moisture content allowing for further processing by heating it to approximately 100° for a short period of time.
- Process according to one of claims 1 to 5, characterised in that the sheet-like fibrous material is impregnated with the plastic.
- Process according to one of claims 1 to 8, characterised in that the plastic content is approximately 5 to 40 % of the fibre content.
- Process according to one of claims 1 to 9, characterised in that the plastic content is approximately 20 to 30 % of the fibre content.
- Process according to one of claims 1 to 10, characterised in that a water-dispersible epoxy system with a slow-acting hardener is used as the plastic.
- Process according to claim 11, characterised in that the slow-acting hardener is a polyaminoamine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4219989A DE4219989C2 (en) | 1992-06-19 | 1992-06-19 | Method of manufacturing a roll with an elastic cover |
| DE4219989 | 1992-06-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0578972A1 EP0578972A1 (en) | 1994-01-19 |
| EP0578972B1 true EP0578972B1 (en) | 1996-07-17 |
Family
ID=6461311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93109352A Expired - Lifetime EP0578972B1 (en) | 1992-06-19 | 1993-06-11 | Process for making a roll having a resilent covering |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5307563A (en) |
| EP (1) | EP0578972B1 (en) |
| JP (1) | JPH0775872B2 (en) |
| AT (1) | ATE140499T1 (en) |
| CA (1) | CA2097948C (en) |
| DE (2) | DE4219989C2 (en) |
| FI (1) | FI103392B1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2171361C (en) * | 1995-03-29 | 1999-03-30 | Christian Wimmar Schmitz | Calender roller |
| DE19533823C2 (en) * | 1995-03-29 | 2002-05-23 | Voith Paper Patent Gmbh | calender roll |
| JPH09189233A (en) * | 1995-12-30 | 1997-07-22 | Sanshin Ind Co Ltd | Engine supporting device of outboard motor |
| US6182333B1 (en) * | 1996-08-27 | 2001-02-06 | Day International, Inc. | Drafting system spinning roller for producing thread |
| DE19635845C1 (en) * | 1996-09-04 | 1998-06-10 | Voith Sulzer Finishing Gmbh | Calender roller with a cover made of elastic plastic |
| DE19928753A1 (en) * | 1999-06-23 | 2000-12-28 | Voith Sulzer Papiertech Patent | Elastic roller and method of making it |
| US7067027B2 (en) * | 2001-11-30 | 2006-06-27 | Xerox Corporation | Method of making an electro-mechanical roll |
| DE10254176B4 (en) * | 2002-11-21 | 2005-06-09 | Carl Freudenberg Kg | Method and device for producing a roll body with elastic cover |
| US7051554B2 (en) * | 2003-12-31 | 2006-05-30 | Global Consulting, Inc. | Tightening a fiber roll cover |
| DE102004019306A1 (en) * | 2004-04-15 | 2005-11-03 | Schäfer Composites GmbH | Surface of a treatment device and method for producing such a treatment device |
| US8549753B2 (en) * | 2009-05-14 | 2013-10-08 | Corning Incorporated | Methods of manufacturing a modular pulling roll |
| JP4484168B1 (en) * | 2009-08-12 | 2010-06-16 | 株式会社増田製作所 | Functional roll with lattice-like gas-liquid conduction path structure |
| TWM429590U (en) * | 2011-12-29 | 2012-05-21 | Zhi-Huang Zhou | Roller structure |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2801461A (en) * | 1954-07-30 | 1957-08-06 | Kusters Eduard | Rolls for use in squeezing liquids from textiles and the like and a method of producing such rolls |
| US2987802A (en) * | 1957-12-31 | 1961-06-13 | Johns Manville | Composition calender roll |
| CH364978A (en) * | 1958-04-08 | 1962-10-15 | Dornbusch & Co | Calender roll and process for their manufacture |
| US3069304A (en) * | 1959-11-16 | 1962-12-18 | Freudenberg Carl Fa | Method of providing a mandrel with a compact uniform covering |
| US3383749A (en) * | 1966-06-28 | 1968-05-21 | Perkins & Son Inc B F | Cotton filled calender roll and method of making |
| JPS4942351A (en) * | 1972-08-29 | 1974-04-20 | ||
| US4583966A (en) * | 1982-10-13 | 1986-04-22 | Beloit Corporation | Method of filling calender/embosser rolls using vibrations |
| DE3303703A1 (en) * | 1983-02-04 | 1984-08-09 | Dieter Dipl.-Ing. 6702 Bad Dürkheim Cordier | CALENDAR ROLLER AND PAPER FOR A CALANDER ROLL FILLING |
| US4475275A (en) * | 1983-03-23 | 1984-10-09 | Edwards William H | Method of producing a filled calender roll |
| US4669163A (en) * | 1985-12-12 | 1987-06-02 | Minnesota Mining And Manufacturing Company | Polyolefin fiber roll |
| DE3909911C1 (en) * | 1989-03-25 | 1990-06-07 | Kleinewefers Gmbh, 4150 Krefeld, De | |
| US5038469A (en) * | 1989-08-22 | 1991-08-13 | Masuda Seisakusho Co., Ltd. | Method of making a porous roll assembly |
| US5097596A (en) * | 1989-11-07 | 1992-03-24 | Consolidated Papers, Inc. | Supercalender roll and method of making same |
-
1992
- 1992-06-19 DE DE4219989A patent/DE4219989C2/en not_active Expired - Fee Related
-
1993
- 1993-06-08 CA CA002097948A patent/CA2097948C/en not_active Expired - Fee Related
- 1993-06-11 AT AT93109352T patent/ATE140499T1/en not_active IP Right Cessation
- 1993-06-11 DE DE59303240T patent/DE59303240D1/en not_active Expired - Fee Related
- 1993-06-11 EP EP93109352A patent/EP0578972B1/en not_active Expired - Lifetime
- 1993-06-15 US US08/076,985 patent/US5307563A/en not_active Expired - Lifetime
- 1993-06-16 FI FI932764A patent/FI103392B1/en active
- 1993-06-17 JP JP5146127A patent/JPH0775872B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FI103392B (en) | 1999-06-30 |
| FI103392B1 (en) | 1999-06-30 |
| DE4219989C2 (en) | 1995-11-30 |
| FI932764A0 (en) | 1993-06-16 |
| EP0578972A1 (en) | 1994-01-19 |
| JPH0775872B2 (en) | 1995-08-16 |
| FI932764A (en) | 1993-12-20 |
| JPH0655672A (en) | 1994-03-01 |
| DE59303240D1 (en) | 1996-08-22 |
| ATE140499T1 (en) | 1996-08-15 |
| CA2097948A1 (en) | 1993-12-20 |
| CA2097948C (en) | 1995-04-04 |
| US5307563A (en) | 1994-05-03 |
| DE4219989A1 (en) | 1993-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0578972B1 (en) | Process for making a roll having a resilent covering | |
| DE3029288A1 (en) | ROLLS COVERED WITH AN ELASTOMERIC MATERIAL AND METHOD FOR THEIR PRODUCTION | |
| AT405950B (en) | PRESS SHEATH FOR DRAINING A PAPER RAIL IN A PRESS NIP OF A PAPER MACHINE AND METHOD FOR THE PRODUCTION THEREOF | |
| EP0175900B1 (en) | Ironing roller, particularly for laundry | |
| EP3408339B1 (en) | Press jacket and method for the production thereof | |
| DE4209921A1 (en) | Mosquito coil made of wood fibre - consists of spiral with 0,4 to 0,7 kg/dm3 density, and coating of active ingredient | |
| EP2678472A1 (en) | Press section of a machine for producing a fibrous web and method for producing a fibrous web | |
| DE3538531C2 (en) | ||
| DE2836460C2 (en) | Hard felt roller or roller | |
| DE2939637C2 (en) | Process for the production of an endless printing belt for a device for the continuous pressing and decatizing of fabrics, knitted fabrics and the like. | |
| DE2914173C2 (en) | Impregnated cylinder head gasket and its manufacturing process | |
| DE2259948A1 (en) | METHOD FOR MANUFACTURING LEATHER FIBER MATERIALS | |
| EP1386101A1 (en) | Gland packing and method for the production thereof | |
| WO2020057800A1 (en) | Press sleeve, use thereof, as well as a pressure roller, shoe press and use of a polyurethane for producing a polymer layer of a press sleeve | |
| EP3853412A1 (en) | Press sleeve, use thereof, as well as a pressure roller, shoe press and use of a polyurethane for producing a press sleeve | |
| DE3204120C3 (en) | Porous support layer for a diatomaceous earth filter cake formed by floating and process for its production | |
| EP0131083A1 (en) | Lining of fibrous material for glazing rolls | |
| DE2050626C3 (en) | Roll for wet presses in high-speed paper machines | |
| DE4312348A1 (en) | Process for the production of a roller | |
| DE2931171A1 (en) | NOSE ROLLER | |
| EP1000198B1 (en) | Method for producing high-temperature resistant technical paper and paper produced according to said method | |
| WO2020057794A1 (en) | Press sleeve, use thereof, as well as a pressure roller, shoe press and use of a polyurethane for producing a polymer layer of a press sleeve | |
| WO2003029559A1 (en) | Method for production of a roller coating | |
| EP0061695A1 (en) | Process for producing a fibrous covering shrinkable by treatment with hot water on a laminating cylinder | |
| DE102008011498A1 (en) | 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 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE FR GB IT NL SE |
|
| 17P | Request for examination filed |
Effective date: 19931201 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FERD. JAGENBERG & SOEHNE GMBH & CO. KG Owner name: SULZER PAPERTEC KREFELD GMBH |
|
| 17Q | First examination report despatched |
Effective date: 19950831 |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FERD. JAGENBERG & SOEHNE GMBH & CO. KG Owner name: VOITH SULZER FINISHING GMBH |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE DE FR GB IT NL SE |
|
| REF | Corresponds to: |
Ref document number: 140499 Country of ref document: AT Date of ref document: 19960815 Kind code of ref document: T |
|
| ITF | It: translation for a ep patent filed |
Owner name: JACOBACCI & PERANI S.P.A. |
|
| ET | Fr: translation filed | ||
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19960722 |
|
| REF | Corresponds to: |
Ref document number: 59303240 Country of ref document: DE Date of ref document: 19960822 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19970527 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19970624 Year of fee payment: 5 Ref country code: BE Payment date: 19970624 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19970630 Year of fee payment: 5 |
|
| 26N | No opposition filed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980611 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980612 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980630 |
|
| BERE | Be: lapsed |
Owner name: FERD. JAGENBERG & SOHNE G.M.B.H. & CO. K.G. Effective date: 19980630 Owner name: VOITH SULZER FINISHING G.M.B.H. Effective date: 19980630 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19990101 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 93109352.0 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19990101 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20010621 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20010710 Year of fee payment: 9 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20020527 Year of fee payment: 10 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030101 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030228 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030611 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20030611 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050611 |