EP0889991B1 - Heated calender roller - Google Patents
Heated calender roller Download PDFInfo
- Publication number
- EP0889991B1 EP0889991B1 EP97922821A EP97922821A EP0889991B1 EP 0889991 B1 EP0889991 B1 EP 0889991B1 EP 97922821 A EP97922821 A EP 97922821A EP 97922821 A EP97922821 A EP 97922821A EP 0889991 B1 EP0889991 B1 EP 0889991B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hose
- carrier
- heating
- roll according
- calendering 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
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/022—Heating the cylinders
- D21F5/024—Heating the cylinders using electrical means
-
- 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
- D21G1/0253—Heating or cooling the rolls; Regulating the temperature
- D21G1/028—Heating or cooling the rolls; Regulating the temperature using electrical means
Definitions
- the invention relates to a heatable calender roll with several heating channels running in the longitudinal direction of the roller body and with one or more inside the heating channels provided, rotating the heating ducts, in rotating Condition of the roller with a power source directly or inductively connectable heaters.
- Such electrically heated calender rolls are, for example from the magazine "The electrical equipment” No. 2, 04/20/66, pages 40 to 44 known. In this release Rollers are mentioned in which peripheral bores by means of Cartridges are heated electrically. The temperature control takes place by means of water cooling in a central bore.
- the heating wires can be made of silicone be poured in.
- the heat is transferred by means of a fluid heat transfer medium, preferably with the help of a thermal oil heated in a heat exchanger, the introduced into the rotating roller via rotary seals becomes.
- a uniform heating is when using thermal oil as a heat transfer medium, however, often not to be achieved, since this more or more during the flow through the heating channels cools less and thus the heat transfer at the end a corresponding heating channel is lower. It can therefore to different thermal expansion in different Areas come so that thickness variations of the rolling stock may occur.
- thermal oil is also problematic because because this is at normal operating temperatures Crack up to around 300 ° C in the course of the operating time can, so that the thermal conductivity decreases.
- the invention has for its object an electrical heatable calender roll to create a good heat transfer between the heating elements and the inner wall the peripheral bores is given without the rollers at Operation will be affected in its dimensional accuracy.
- Heaters on or in a hose-like support made of soft elastic Plastic, in particular from a polyorganosiloxane compound, are arranged so that they are under radial Expansion together with the tube-like carrier to the inner peripheral surfaces of the heating channels can be created.
- the calender roll according to the invention can with the help of the Heating channels pulling electrical heaters or the tubular support for the heaters extraordinary be heated evenly since the electric heating elements become equally warm at every point of the heating duct. Thereby can be an extremely precise roller profile or a corresponding precise nip can be set.
- the heating elements are applied using a Plastic hose, preferably made of a polyorganosiloxane compound exists and one opposite the heating duct has a smaller cross-section.
- a hose made of this soft elastic Plastic can easily enter the heating ducts be introduced, so that the retrofitting of previously with Thermal oil heated calender rolling mills is possible.
- the outer peripheral surface of the Carrier hose by pressurizing the inner Circumferential surface of the heating channels pressed. For example by vulcanizing or gluing the polyorganosiloxane compound done with the metal surface.
- a pressure relief valve is installed on at least one side is used to operate at too high temperatures Roll an impermissible excess pressure inside the heating channels or to prevent the carrier hose safely.
- the pressure medium can also be used such as nitrogen.
- a polyorganosiloxane compound for the production of the carrier hose is preferably a fluorosilicone or a silicone rubber used. These types of silicone are temperature resistant up to approx. 300 ° C, are permanently elastic, resistant to aging and insensitive to chemicals. Besides, is the production of such hoses using an extrusion process comparatively unproblematic, the electrical heating already in the hose production in the Hose wall can be extruded.
- the electrical is Heating preferably as a radially flexible spiral wire or radially compliant wire mesh, the via a direct electrical connection or inductively heated can be.
- the heating wire preferably has an insulation coating on so that, for example, at a electric resistance heating, an extended heating section results.
- the electrical Heating conductor in the hose wall, this can also on the Glued on the inside or outside or otherwise attached his. It is preferably also possible to remove the carrier tube an inner tube of smaller diameter and an outer tube manufacture larger diameter, the electrical Heating is arranged between the two hoses.
- An adhesive can then also be provided between the two hoses be so that a very good heat transfer is guaranteed is.
- the heating conductor is designed as an electrical resistance heater this is preferably with slip rings the corresponding power supply.
- a coil to provide the electrical heating inductively heated, but with this heating method the electrostatic charge of the rolling material is respected must become.
- the temperature control of the roll surface is in the invention Calender roller comparatively simply because of this possible that thermocouples or thermocouples on the carrier hose are provided, the legs for controlling the heating current can in turn be tapped via sliding contacts.
- the drawing figure shows a section through the outer Jacket 1 of a heatable calender roll.
- a heating channel 3 into which a carrier hose 4 is introduced, in the wall 5 a spiral Heating wire 6 is extruded.
- the carrier tube 4 is pressure-tight closed while its rear end 8 in a pressure sleeve 9 extends through the compressed air into the interior 10 of the carrier hose 4 can be directed so that it inflates and tight against the inner wall 11 of the heating duct 3 creates and glued to it.
- the pressure sleeve 9 can alternatively pressure-tight with the help of a pressure relief valve, not shown be closed while contacting the heating wire 6 via slip rings, also not shown.
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
Die Erfindung betrifft eine beheizbare Kalanderwalze mit mehreren in Längsrichtung des Walzenkörpers verlaufenden Heizkanälen und mit einer oder mehreren im Inneren der Heizkanäle vorgesehenen, die Heizkanäle durchziehenden, in rotierendem Zustand der Walze mit einer Stromquelle direkt oder induktiv verbindbaren Heizungen.The invention relates to a heatable calender roll with several heating channels running in the longitudinal direction of the roller body and with one or more inside the heating channels provided, rotating the heating ducts, in rotating Condition of the roller with a power source directly or inductively connectable heaters.
Derartige elektrisch beheizbare Kalanderwalzen sind beispielsweise aus der Zeitschrift "Die elektrische Ausrüstung" Nr. 2, 20.04.66, Seiten 40 bis 44 bekannt. In dieser Veröffentlichung werden Walzen erwähnt, bei denen peripherische Bohrungen mittels Heizpatronen elektrisch beheizt werden. Die Temperaturregelung erfolgt mittels einer Wasserkühlung in einer Zentralbohrung.Such electrically heated calender rolls are, for example from the magazine "The electrical equipment" No. 2, 04/20/66, pages 40 to 44 known. In this release Rollers are mentioned in which peripheral bores by means of Cartridges are heated electrically. The temperature control takes place by means of water cooling in a central bore.
Darüber hinaus ist es aus der DE-OS 30 33 689 A1 bekannt, Kalanderwalzen mittels Heizmatten elektrisch zu beheizen. Dabei können für niedrige Temperaturen die Heizdrähte in Silikonmasse eingegossen sein.In addition, it is known from DE-OS 30 33 689 A1 To heat calender rolls electrically using heating mats. For low temperatures, the heating wires can be made of silicone be poured in.
Bei den aus der DE-OS 43 19 868 bekannten Kalanderwalzen werden stabförmige Heizelemente in achsparallele Kanäle eingeschoben. Um einen ausreichenden Wärmeübergang zwischen den Heizelementen und der inneren Wandung der peripheren Kanäle zu gewährleisten, werden diese mit einer schmelzbaren Metallegierung ausgegossen.In the calender rolls known from DE-OS 43 19 868 rod-shaped heating elements inserted in axially parallel channels. To ensure adequate heat transfer between the Heating elements and the inner wall of the peripheral channels ensure these are made with a fusible metal alloy poured out.
Bei diesen Kalanderwalzen besteht jedoch die Gefahr von Verwerfungen durch die Wärmeausdehnungen der Metallegierung, außerdem muß für die Heizelemente eine isolierende Beschichtung vorgesehen sein, da sonst der Heizstrom die gesamte Walze beaufschlagen würde.With these calender rolls, however, there is a risk of warping due to the thermal expansion of the metal alloy, an insulating coating must also be used for the heating elements be provided, otherwise the heating current will cover the entire roller would act upon.
Bei anderen beheizbaren Kalanderwalzen erfolgt die Wärmeübertragung mittels eines fluiden Wärmeträgers, vorzugsweise mit Hilfe eines in einem Wärmetauscher erhitzten Thermoöles, das über Rotationsdichtungen in die rotierende Walze eingeleitet wird.With other heatable calender rolls, the heat is transferred by means of a fluid heat transfer medium, preferably with With the help of a thermal oil heated in a heat exchanger, the introduced into the rotating roller via rotary seals becomes.
Beim Einsatz von Thermoöl wird die Gleichmäßigkeit der Erwärmung über die Temperatur und Durchflußmenge des Thermoöles gesteuert. Eine sehr gleichmäßige Erwärmung der Walzenoberfläche ist bei derartigen Kalanderwalzen außerordentlich wichtig, da z. B. bei bestimmten Kunststoffolien bereits Dickenabweichungen von weniger als 0,1 µ zu einem fehlerhaften Fertigerzeugnis führen können.When using thermal oil, the uniformity of heating about the temperature and flow rate of the thermal oil controlled. A very even heating of the roller surface is extremely important with such calender rolls, there z. B. with certain plastic films already thickness deviations less than 0.1 µ to a defective finished product being able to lead.
Um derartig geringe Toleranzen gewährleisten zu können, sind die üblicherweise aus Hartguß bestehenden Walzen z. B. ballig geschliffen, um die durch die Schwerkraft stattfindende Durchbiegung kompensieren zu können.In order to be able to guarantee such small tolerances, the usually made of cast iron rolls z. B. crowned ground to the deflection taking place by gravity to be able to compensate.
Eine gleichmäßige Erwärmung ist bei der Verwendung von Thermoöl als Wärmeträger jedoch häufig nicht zu erreichen, da dieses sich während des Durchflusses durch die Heizkanäle mehr oder weniger stark abkühlt und somit der Wärmeübergang am Ende eines entsprechenden Heizkanales geringer ist. Es kann daher zu unterschiedlicher thermischer Ausdehnung in unterschiedlichen Bereichen kommen, so daß Dickenabweichungen des Walzgutes auftreten können.A uniform heating is when using thermal oil as a heat transfer medium, however, often not to be achieved, since this more or more during the flow through the heating channels cools less and thus the heat transfer at the end a corresponding heating channel is lower. It can therefore to different thermal expansion in different Areas come so that thickness variations of the rolling stock may occur.
Die Verwendung von Thermoöl ist darüber hinaus deswegen problematisch, weil dieses bei den üblichen Betriebstemperaturen bis etwa 300 °C im Laufe der Betriebsdauer teilweise vercrakken kann, so daß die Wärmeleitfähigkeit abnimmt.The use of thermal oil is also problematic because because this is at normal operating temperatures Crack up to around 300 ° C in the course of the operating time can, so that the thermal conductivity decreases.
Außerdem können sich dadurch Vercrackungsprodukte in den Heizkanälen bzw. an den Dichtungen absetzen, so daß entsprechende Querschnittsverengungen die Folge sind bzw. Dichtigkeitsprobleme auftreten können.This can also result in cracking products in the heating channels or settle on the seals so that the corresponding Cross-sectional constrictions are the result or tightness problems may occur.
Problematisch ist bei dieser Art der Kalanderbeheizung weiterhin die Entsorgung des Altöles. This type of calender heating continues to be problematic the disposal of the used oil.
Der Erfindung liegt die Aufgabe zugrunde, eine elektrisch beheizbare Kalanderwalze zu schaffen, bei der ein guter Wärmeübergang zwischen den Heizelementen und der inneren Wandung der peripheren Bohrungen gegeben ist, ohne daß die Walzen beim Betrieb in ihrer Maßhaltigkeit beeinträchtigt werden.The invention has for its object an electrical heatable calender roll to create a good heat transfer between the heating elements and the inner wall the peripheral bores is given without the rollers at Operation will be affected in its dimensional accuracy.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Heizungen an oder in einem schlauchartigen Träger aus weichelastischem Kunststoff, insbesondere aus einer Polyorganosiloxanverbindung, derart angeordnet sind, daß sie unter radialer Aufweitung zusammen mit dem schlauchartigen Träger an die inneren Umfangsflächen der Heizkanäle anlegbar sind.This object is achieved in that the Heaters on or in a hose-like support made of soft elastic Plastic, in particular from a polyorganosiloxane compound, are arranged so that they are under radial Expansion together with the tube-like carrier to the inner peripheral surfaces of the heating channels can be created.
Die erfindungsgemäße Kalanderwalze kann mit Hilfe der die Heizkanäle durchziehenden elektrischen Heizungen bzw. dem schlauchartigen Träger für die Heizungen außerordentlich gleichmäßig erwärmt werden, da die elektrischen Heizelemente an jeder Stelle des Heizkanales gleich warm werden. Dadurch kann ein äußerst präzises Walzenprofil bzw. ein entsprechender präziser Walzenspalt eingestellt werden.The calender roll according to the invention can with the help of the Heating channels pulling electrical heaters or the tubular support for the heaters extraordinary be heated evenly since the electric heating elements become equally warm at every point of the heating duct. Thereby can be an extremely precise roller profile or a corresponding precise nip can be set.
Mit den elektrischen Heizelementen kann auf die bisher verwendeten, teuren Rotationsdichtungen, auf Wärmetauscher sowie Vorratsbehälter für das Thermoöl verzichtet werden, so daß nicht nur die Herstellungskosten, sondern auch die Betriebskosten der Kalanderwalzwerke insgesamt drastisch gesenkt werden kann.With the electrical heating elements, the previously used, expensive rotary seals, on heat exchangers as well Storage containers for the thermal oil can be dispensed with, so that not only the manufacturing costs, but also the operating costs of the calender rolling mills can be drastically reduced overall can.
Die Applikation der Heizelemente erfolgt mit Hilfe eines Kunststoffschlauches, der vorzugsweise aus einer Polyorganosiloxanverbindung besteht und einen gegenüber dem Heizkanal geringeren Querschnitt aufweist. Ein Schlauch aus diesem weichelastischen Kunststoff kann problemlos in die Heizkanäle eingeführt werden, so daß auch die Nachrüstung von bisher mit Thermoöl beheizten Kalanderwalzwerken möglich ist.The heating elements are applied using a Plastic hose, preferably made of a polyorganosiloxane compound exists and one opposite the heating duct has a smaller cross-section. A hose made of this soft elastic Plastic can easily enter the heating ducts be introduced, so that the retrofitting of previously with Thermal oil heated calender rolling mills is possible.
Um einen guten Wärmeübergang der elektrischen Heizung mit dem Walzenkörper zu erreichen, wird die äußere Umfangsfläche des Trägerschlauches durch Druckbeaufschlagung gegen die innere Umfangsfläche der Heizkanäle gedrückt. Dies kann beispielsweise durch ein Aufvulkanisieren oder Verkleben der Polyorganosiloxanverbindung mit der Metalloberfläche erfolgen.To ensure a good heat transfer of the electric heater with the To reach the roller body, the outer peripheral surface of the Carrier hose by pressurizing the inner Circumferential surface of the heating channels pressed. For example by vulcanizing or gluing the polyorganosiloxane compound done with the metal surface.
Um den Trägerschlauch gegen die Innenwandung der Heizkanäle mit genügend hoher Kraft zu pressen, wird er z. B. mit einem Druckluft erzeugenden Kompressor verbunden. Genügend hohe Andruckkräfte zum Verkleben der Schlauchoberfläche werden z. B. erreicht, wenn ein Druck von ca. 2,5 bar angewendet wird.To the carrier hose against the inner wall of the heating channels to press with sufficient force, he will z. B. with a Compressed air generating compressor connected. Enough high Pressure forces for gluing the hose surface are such. B. achieved when a pressure of approximately 2.5 bar is applied.
Andererseits kann mit Hilfe der Druckbeaufschlagung des Trägerschlauches auf ein Verkleben oder Aufvulkanisieren auch völlig verzichtet werden, wenn der Trägerschlauch an seinen Enden druckdicht verschlossen werden kann. Durch den erhöhten Innendruck legt sich auch hier der Schlauch wiederum dicht mit hoher Wärmeübertragungskapazität an die Innenfläche der Heizkanäle an, wobei jedoch etwa bei einem Defekt des Heizdrahtes ein völlig problemloser Austausch des Trägerschlauches möglich ist, wenn der Innendruck auf atmosphärischen Druck abgesenkt wird und sich der Kunststoffschlauch aufgrund seiner elastischen Eigenschaften infolgedessen auf seinen ursprünglichen Durchmesser zusammenzieht.On the other hand, with the help of pressurization of the carrier hose on gluing or vulcanization too be completely dispensed with if the carrier hose is attached to its Ends can be closed pressure-tight. By the increased Here too, the inner hose is tightly sealed high heat transfer capacity to the inner surface of the heating channels on, but in the event of a defect in the heating wire a completely problem-free exchange of the carrier hose is possible is when the internal pressure is lowered to atmospheric pressure and the plastic tube due to its elastic Properties as a result of its original Diameter contracts.
Beim Arbeiten mit Druckluft sollte jedoch darauf geachtet werden, daß zumindest an einer Seite ein Überdruckventil eingebaut wird, um bei zu hohen Temperaturen beim Betrieb der Walzen einen unzulässigen Überdruck im Inneren der Heizkanäle bzw. des Trägerschlauches sicher zu verhindern.However, care should be taken when working with compressed air be that a pressure relief valve is installed on at least one side is used to operate at too high temperatures Roll an impermissible excess pressure inside the heating channels or to prevent the carrier hose safely.
Als Druckmedium kann neben Druckluft oder auch ein inertes Gas wie beispielsweise Stickstoff verwendet werden.In addition to compressed air or an inert gas, the pressure medium can also be used such as nitrogen.
Als Polyorganosiloxanverbindung zur Herstellung des Trägerschlauches wird vorzugsweise ein Fluorsilikon oder ein Silikongummi verwendet. Diese Silikonsorten weisen eine Temperaturbeständigkeit bis ca. 300 °C auf, sind dauerelastisch, alterungsbeständig und chemikalienunempfindlich. Außerdem ist die Herstellung derartiger Schläuche mit Hilfe eines Extrudierverfahrens vergleichsweise unproblematisch, wobei die elektrische Heizung bereits bei der Schlauchherstellung in die Schlauchwandung einextrudiert werden kann.As a polyorganosiloxane compound for the production of the carrier hose is preferably a fluorosilicone or a silicone rubber used. These types of silicone are temperature resistant up to approx. 300 ° C, are permanently elastic, resistant to aging and insensitive to chemicals. Besides, is the production of such hoses using an extrusion process comparatively unproblematic, the electrical heating already in the hose production in the Hose wall can be extruded.
Um ein Aufblasen des Schlauches zu ermöglichen, ist die elektrische Heizung vorzugsweise als radial nachgiebiger Spiraldraht oder radial nachgiebiges Drahtgeflecht ausgebildet, das über einen direkten elektrischen Anschluß oder induktiv beheizt werden kann. Vorzugsweise weist der Heizdraht eine Isolationsbeschichtung auf, so daß sich, beispielsweise bei einer elektrischen Widerstandsheizung, eine verlängerte Heizstrecke ergibt.To allow inflation of the tube, the electrical is Heating preferably as a radially flexible spiral wire or radially compliant wire mesh, the via a direct electrical connection or inductively heated can be. The heating wire preferably has an insulation coating on so that, for example, at a electric resistance heating, an extended heating section results.
Da die Heizkanäle in den bekannten Kalanderwalzen bisher üblicherweise mit Hilfe von Bohrstangen erzeugt wurden, die die entsprechenden Bohrungen jeweils von den gegenüberliegenden Stirnseiten ausführten, kam es bei dem praktisch nicht zu vermeidenden Verlauf des Bohrers im mittleren Bereich der Walze zu einem Versatz des Bohrloches. Aufgrund des flexiblen Trägerschlauches ist auch in diesem Fall ein problemloses Einführen der Heizung möglich. Sollte bei einem zu großen Versatz das Durchführen des Schlauches nicht mehr möglich sein, können zwei kürzere Heizschläuche von den gegenüberliegenden Stirnflächen bis zum Bohrlochversatz eingeführt werden.Since the heating channels in the known calender rolls have so far been customary were produced with the help of boring bars that the corresponding holes from the opposite End faces, it was practically not possible avoiding course of the drill in the middle area of the Roll to offset the borehole. Because of the flexible Carrier hose is also a problem in this case Heating can be inserted. Should be too big Offset the passage of the hose is no longer possible can be two shorter heating hoses from the opposite End faces are inserted up to the borehole offset.
Neben dem bereits erwähnten Einextrudieren des elektrischen Heizleiters in die Schlauchwandung kann dieser auch an der Innen- oder Außenseite aufgeklebt oder sonstwie befestigt sein. Es ist vorzugsweise auch möglich, den Trägerschlauch aus einem Innenschlauch kleineren Durchmessers und einem Außenschlauch größeren Durchmessers herzustellen, wobei die elektrische Heizung zwischen beiden Schläuchen angeordnet ist.In addition to the already mentioned extrusion of the electrical Heating conductor in the hose wall, this can also on the Glued on the inside or outside or otherwise attached his. It is preferably also possible to remove the carrier tube an inner tube of smaller diameter and an outer tube manufacture larger diameter, the electrical Heating is arranged between the two hoses.
Zwischen beiden Schläuchen kann dann auch ein Kleber vorgesehen sein, so daß ein sehr guter Wärmeübergang gewährleistet ist. An adhesive can then also be provided between the two hoses be so that a very good heat transfer is guaranteed is.
Bei der Ausbildung des Heizleiters als elektrische Widerstandsheizung wird dieser vorzugsweise über Schleifringe mit der entsprechenden Stromversorgung kontaktiert. Andererseits ist es jedoch auch möglich, im inneren zentralen Hohlraum der Walze eine Spule vorzusehen, die die elektrische Heizung induktiv beheizt, wobei bei dieser Beheizungsmethode jedoch auf die elektrostatische Aufladung des Walzmaterials geachtet werden muß.When the heating conductor is designed as an electrical resistance heater this is preferably with slip rings the corresponding power supply. On the other hand it is also possible, however, in the inner central cavity Roll a coil to provide the electrical heating inductively heated, but with this heating method the electrostatic charge of the rolling material is respected must become.
Die Temperatursteuerung der Walzenoberfläche ist bei der erfindungsgemäßen Kalanderwalze vergleichsweise einfach dadurch möglich, daß am Trägerschlauch Thermofühler bzw. Thermoelemente vorgesehen sind, deren Schenkel zur Steuerung des Heizstromes wiederum über Schleifkontakte abgegriffen werden können.The temperature control of the roll surface is in the invention Calender roller comparatively simply because of this possible that thermocouples or thermocouples on the carrier hose are provided, the legs for controlling the heating current can in turn be tapped via sliding contacts.
Die Erfindung ist in der Zeichnung beispielsweise veranschaulicht und wird im nachfolgenden anhand der Zeichnung im einzelnen erläutert.The invention is illustrated in the drawing, for example and will be described in detail below with reference to the drawing explained.
Die Zeichnungsfigur zeigt einen Schnitt durch den äußeren Mantel 1 einer beheizbaren Kalanderwalze.The drawing figure shows a section through the outer Jacket 1 of a heatable calender roll.
In Längsrichtung der Walze befindet sich vergleichsweise nahe
unter der Walzenoberfläche 2 ein Heizkanal 3, in den ein Trägerschlauch
4 eingeführt ist, in dessen Wandung 5 ein spiralförmiger
Heizdraht 6 einextrudiert ist.In the longitudinal direction of the roller is comparatively close
under the
An seinem vorderen Ende 7 ist der Trägerschlauch 4 druckdicht
verschlossen, während sich sein hinteres Ende 8 in eine Druckhülse
9 erstreckt, durch die Druckluft ins Innere 10 des Trägerschlauches
4 geleitet werden kann, so daß dieser sich aufbläst
und dicht gegen die Innenwandung 11 des Heizkanales 3
anlegt und mit ihr verklebt. Die Druckhülse 9 kann alternativ
mit Hilfe eines nicht dargestellten Überdruckventiles druckdicht
verschlossen werden, während die Kontaktierung des Heizdrahtes
6 über ebenfalls nicht dargestellte Schleifringe erfolgt. At its
- 11
- Mantelcoat
- 22nd
- WalzenoberflächeRoller surface
- 33rd
- HeizkanalHeating duct
- 44th
- TrägerschlauchCarrier hose
- 55
- WandungWall
- 66
- HeizdrahtHeating wire
- 77
- vorderes Endefront end
- 88th
- hinteres Enderear end
- 99
- DruckhülsePressure sleeve
- 1010th
- InneresInterior
- 1111
- InnenwandungInner wall
Claims (11)
- Heatable calendering roll with several heating channels extending in the longitudinal direction of the roll body and with one or more heaters (6) which are provided in the interior of the heating channels and pass through the heating channels (3) and which in the rotating state of the roll are directly or inductively connectible with a current source, characterised in that the heaters (6) are arranged at or in a hose-like carrier (4) of soft-elastic synthetic material, especially of a polyorganosiloxane compound, in such a manner that under radial expansion they are able to bear, together with the hose-like carrier (4), against the inner circumferential surface (11) of the heating channels.
- Calendering roll according to claim 1, characterised in that the outer circumferential surface of the carrier hose (4) is connected with the inner circumferential surface (11) of the heating channels (3) by vulcanising or gluing.
- Calendering roll according to claim 1 or 2, characterised in that the carrier hose (4) is loadable with pressurised gas, especially compressed air.
- Calendering roll according to one of claims 1 to 3, characterised in that a fluoro silicon or a silicon rubber is used as the polyorganosiloxane.
- Calendering roll according to one of claims 1 to 4, characterised in that the electric heater (6) is constructed in the form of a radially flexible spiral wire or wire mesh, which is extrusion-moulded into the wall (5) of the carrier hose (4).
- Calendering roll according to one of claims 1 to 5, characterised in that the heating wire (6) has an insulating coating.
- Calendering roll according to one of claims 1 to 6, characterised in that two carrier hoses (4) extending approximately up to the roll centre are provided.
- Calendering roll according to one of claims 1 to 7, characterised in that the carrier hose (4) consists of an inner hose of smaller diameter and an outer hose of larger diameter, wherein the electric heater (6) is arranged between inner hose and outer hose.
- Calendering roll according to claim 8, characterised in that the hoses are glued together.
- Calendering roll according to one of claims 1 to 9, characterised in that the heater is constructed as an induction heater.
- Calendering roll according to one of claims 1 to 10, characterised in that thermosensors for controlling the heating current of the electric heater are provided at the outer side of the carrier hose.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19612324A DE19612324C1 (en) | 1996-03-28 | 1996-03-28 | Non-distorting calendar roller heated efficiently by electric heaters |
| DE19612324 | 1996-03-28 | ||
| PCT/DE1997/000633 WO1997037077A1 (en) | 1996-03-28 | 1997-03-27 | Heated calender roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0889991A1 EP0889991A1 (en) | 1999-01-13 |
| EP0889991B1 true EP0889991B1 (en) | 2000-02-09 |
Family
ID=7789717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97922821A Expired - Lifetime EP0889991B1 (en) | 1996-03-28 | 1997-03-27 | Heated calender roller |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0889991B1 (en) |
| DE (2) | DE19612324C1 (en) |
| WO (1) | WO1997037077A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104342801A (en) * | 2013-08-05 | 2015-02-11 | T-马克有限公司 | Closed-type contact heater assembly used for thermal-treatment of yarn |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9907150D0 (en) * | 1999-03-29 | 1999-05-19 | Racster Nicholas | A method of making a body having a temperature controllable outer surface |
| DE102008019720A1 (en) * | 2008-04-18 | 2009-10-22 | Leonhard Kurz Stiftung & Co. Kg | Heated embossing roll |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3185816A (en) * | 1963-08-30 | 1965-05-25 | Du Pont | Temperature controlled device |
| DE3033689A1 (en) * | 1980-09-08 | 1982-04-22 | Maschinenfabrik Ludwig Rümmer, 8602 Bischberg | Electrically heated roller - has heating mats between inner tube and outer roller mantle tube |
| EP0578971B1 (en) * | 1992-06-22 | 1995-09-27 | Walzen Irle GmbH | Electrically heated calanderroll |
| DE29615219U1 (en) * | 1996-08-31 | 1996-11-14 | Walzen Irle Gmbh | Electrically heated calender roll |
-
1996
- 1996-03-28 DE DE19612324A patent/DE19612324C1/en not_active Expired - Fee Related
-
1997
- 1997-03-27 WO PCT/DE1997/000633 patent/WO1997037077A1/en active IP Right Grant
- 1997-03-27 DE DE59701114T patent/DE59701114D1/en not_active Expired - Fee Related
- 1997-03-27 EP EP97922821A patent/EP0889991B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104342801A (en) * | 2013-08-05 | 2015-02-11 | T-马克有限公司 | Closed-type contact heater assembly used for thermal-treatment of yarn |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0889991A1 (en) | 1999-01-13 |
| WO1997037077A1 (en) | 1997-10-09 |
| DE59701114D1 (en) | 2000-03-16 |
| DE19612324C1 (en) | 1997-06-05 |
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