EP1703018B1 - Dispositif et procédé pour le chauffage de rouleaux - Google Patents

Dispositif et procédé pour le chauffage de rouleaux Download PDF

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Publication number
EP1703018B1
EP1703018B1 EP05005469A EP05005469A EP1703018B1 EP 1703018 B1 EP1703018 B1 EP 1703018B1 EP 05005469 A EP05005469 A EP 05005469A EP 05005469 A EP05005469 A EP 05005469A EP 1703018 B1 EP1703018 B1 EP 1703018B1
Authority
EP
European Patent Office
Prior art keywords
temperature
roller
inductor
control medium
heat
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.)
Not-in-force
Application number
EP05005469A
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German (de)
English (en)
Other versions
EP1703018A1 (fr
Inventor
Ludwig Hellenthal
Hans-Jochen Dr.-Ing. Rindfleisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Walzen Irle GmbH
Original Assignee
Walzen Irle GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Walzen Irle GmbH filed Critical Walzen Irle GmbH
Priority to EP05005469A priority Critical patent/EP1703018B1/fr
Priority to DE502005003188T priority patent/DE502005003188D1/de
Priority to AT05005469T priority patent/ATE389061T1/de
Publication of EP1703018A1 publication Critical patent/EP1703018A1/fr
Application granted granted Critical
Publication of EP1703018B1 publication Critical patent/EP1703018B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21G1/0253—Heating or cooling the rolls; Regulating the temperature
    • D21G1/0266—Heating or cooling the rolls; Regulating the temperature using a heat-transfer fluid
    • 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
    • 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 device according to the preamble of claim 1 and a method according to the preamble of claim 10.
  • Such devices and methods are used for the direct electrical heating of rolls, in particular one or more rolls used in a calender for the calibration, densification and / or smoothing of paper webs.
  • the currently most widespread method for heating rolls for the treatment and / or production of webs under the action of elevated temperatures in the nip utilizes the convective heat transfer from a liquid or vaporous heat transfer medium to the roll.
  • the roller With peripheral, parallel to the roll axis bores through which the heat transfer medium is pumped by pumping in the circuit between the roller and a heat exchanger.
  • the heat transfer medium in the heat exchanger absorbs heat, whereby its temperature increases by a certain value.
  • This amount of heat is released into the peripheral bores to the roller, wherein the temperature of the heat transfer medium decreases by the corresponding value again to heat in the following passage through the heat exchanger again to the flow temperature.
  • the flow temperature gradually increases with the heating of the roller and finally reaches its end value when the stationary operating value of the roll temperature has been set in the roll gap.
  • a roller used in a calender conventional design represents a hollow cylinder made of cast steel with a wall thickness in the range of 100-200 mm and an outer diameter in the range of 300 -1600 mm.
  • the peripheral holes lie on a pitch circle whose diameter is 90-150 mm is smaller than the outer diameter of the roller, wherein the typical diameter of the peripheral bores 20 - 38 mm. The smallest distance of the peripheral bores is thus 35 mm from the outer and 35-135 mm from the inner shell surface of the roller.
  • a method for controlling the temperature of a roller which in addition to inner also uses external heating means.
  • heating means such as an induction coil, an infrared radiator or a fan heater, which are arranged radially above the roller and with the aid of which the heat can be transmitted directly to the outer roller surface. This can safely achieve significantly higher heating rates at the roll surface than with an internal heater alone.
  • a roll is to be adjusted during operation from a higher to a lower nip temperature
  • this is done according to the known method in such a way that, while maintaining the higher nip temperature
  • the temperature of the heat carrier in the peripheral bores is reduced by corresponding reduction in the performance of the heat exchanger in the vicinity of the setting in stationary operation at the lower roll nip temperature value, at the same time the heat transferred from the external heating means to the outer roll surface heating power is increased accordingly.
  • the temperature of the heat carrier in the peripheral bores has reached its desired value, the nip temperature can be lowered very rapidly by a corresponding reduction in the output of the outer heating means to the lower value without exceeding the permissible temperature gradient.
  • the disadvantage of this method is that it requires two independently controllable heat sources and a complex control loop.
  • thermo roll with an outer inductive heating for use in a calender which consists of three coaxial, radially and tangentially material and non-positively connected hollow cylinders.
  • the inner hollow cylinder represents the body of a conventional calender roll made of cast steel.
  • the radially above arranged hollow cylinder consists of a magnetically non-conductive, electrically insulating and particularly temperature-resistant Material, preferably Teflon and has a wall thickness of 10-100 mm.
  • the outer hollow cylinder is made of ferromagnetic material and should have a wall thickness of 1 - 50mm.
  • the middle hollow cylinder separates the outer thermally as well as magnetically and electrically from the inner, mechanically bearing cylinder.
  • Thermally, magnetically and electrically active is thus alone the outer cylinder, in which the magnetic field of radially overlying stationary arranged inductor propagates and thereby induced eddy currents flow, whereby the heat output from the inductor is transmitted to the roller.
  • the invention is therefore based on the object, an apparatus and a method for heating a roller of the type mentioned above, in particular for use in a calender form such that it is possible, the process-technically unusable portion of the delivered power from the AC power source To press on values below 10%, and which also allows to dispense with a special temperature control, without thereby fully exploiting the short-term power reserves available the AC source to the risk that allowable limits of the temperature gradient in stationary or non-stationary operation of the roller are exceeded.
  • the outer temperature control means comprises at least one heat exchanger which forms a closed circuit for the temperature control with the peripheral bores of the roller.
  • the outer temperature control means is an inductor having a conductor formed as a waveguide, and that the tempering medium is guided in a circuit both through the bores of the roller and through the hollow conductor.
  • the current conductors may be formed into an inductor loop such that they all have the same distance from the surface of the roller.
  • the inductor may comprise the inductor loop and a magnetic yoke.
  • the inductor may be formed in cross-section E-shaped, wherein the current conductors are arranged between the legs.
  • the temperature control circuit can be regulated if a valve is arranged in the circuit of the temperature control medium.
  • the outer tempering performance and thus also the ratio of the two tempering powers to each other can be influenced in a simple manner if the inductor is assigned an adjusting device for the air gap between the inductor and the roller.
  • the conductors can be made of copper and / or aluminum.
  • the ratio of the proportions of the outer and inner temperature to each other during operation of the roller can be influenced by changing the circulation rate of the temperature.
  • excess heat can be dissipated via a heat exchanger arranged in a branch of the temperature control medium circuit located as a bypass to the peripheral bores.
  • the inductor may be associated with the roller, through the peripheral bores of the tempering medium is circulated.
  • a further heat transfer can occur by radiation when the inductor for operating temperatures of about 200 ° C is designed.
  • the convective heat transfer can be influenced by changing the circulation rate of the temperature control medium.
  • a complex temperature control is not required when a roller is associated with a programmable logic controller that adjusts all occurring stationary and non-stationary operating conditions such that process-optimal parameters are achieved with high reliability.
  • a roller 1 with peripheral holes 2 and at least one outer, arranged radially above the roller 1 inductor 3 is shown, which consists of an inductor 4-shaped conductors 5 and the inductor loop 4 enclosing magnetic yoke 6, the surface of the roller 1 a distance has as air gap 7.
  • the current conductors 5 are formed as waveguides, which preferably consist of copper or aluminum.
  • a liquid or vaporous temperature control medium for example water or mineral oil.
  • FIG. 2 can be seen in the in FIG. 1 shown in cross-section roller 1 with inductor 3 is shown in side view, the peripheral holes 2 and the tubular cavities of the conductor 5 via a rotary inlet 8 of the roller 1 and fittings 9, which are located on formed as a hollow sections power supply lines 10 of the inductor loop 4 means Circulation pump 11 interconnected to a closed flow circuit.
  • the temperature control medium is constantly exchanged between inductor 3 and roller 1.
  • a heat exchanger 12 is bypassed via a valve 13, which is connected via T-pieces to the rotary inlet 8 with the peripheral bores 2.
  • the inductor loop 4 heats up. This current heat is now transferred to the flowing in the cavities of the profiles of the conductor 5 tempering and transported with this in the peripheral holes 2 of the roller 1. There, the current heat of the inductor 3 is convectively transmitted from the temperature control to the roller 1, so that it heats up from the inside.
  • heating power from the inductor 3 is transmitted inductively and at sufficiently high temperature by heat radiation to a surface layer located directly on the surface of the roller 1, whereby the roller 1 additionally heats up from the outside.
  • the ratio a H of external heating power N a to internal heating power N i a H N a / N i is determined in the usual Induktorkonstrutationen essentially by the active current in relation to the reactive current of the inductor.
  • the reactive current is the component of the inductor current, which is required for the generation of the magnetic field of the inductor 3 in order to be able to effect with the help of the inductive transmission of the heating power to the extent necessary.
  • the active current component of the inductor current is authoritative, whereas the current heat in the current conductors 5 of the inductor 3 and the corresponding heating power is caused by both components of the inductor current.
  • the larger the reactive current component becomes in relation to the effective current component of the inductor current the stronger the effect in the current conductors 5 of the inductor Heating power over the self-produced in the roll 1 in appearance.
  • N a / N i R w / R s ⁇ cos 2 ⁇ ⁇
  • N a is the proportion of the inductively transmitted and generated on the surface of the roller 1 outer heating power
  • N i the proportion of induced in the conductors 5 of the inductor 3 by the inductor and convectively transferred to the roller heating power
  • R w the effective ohmic resistance
  • R s are the effective ohmic resistance of the inductor loop 4 including the power supply lines 10 and ⁇ the phase angle between the supply current and supply voltage to the terminals of the AC power source.
  • cos ⁇ is referred to as a power factor and represents the ratio of the active power to the product of the supply current and supply voltage, the so-called apparent power of the AC power source.
  • Such variations of the magnetic coupling can be achieved in the present example by adjusting the air gap 7 between the magnetic yoke 6 and the roller 1, wherein a decrease in the air gap 7 causes an increase in the degree of magnetic coupling.
  • a further, but not stepless adjustment of the heating power ratio a H is possible in that the ohmic resistance of the inductor loop 4 is changed. This can be achieved, for example, by increasing or decreasing the number of parallel, current conductors 5 of the inductor loop 4 through which the alternating current source is switched on or off. To avoid the expense of circuit breakers, this measure is preferably carried out in the de-energized state of the inductor 3. This ensures that the range limits for the continuous adjustment of a H are shifted upwards or downwards accordingly.
  • the excess current heat output of the inductor 3 can optionally be used to heat a second roll in the calender.
  • FIG. 3 Such a calender is in FIG. 3 shown.
  • pressure rollers 14 are arranged together with two rollers 1 and 15. Both rolls 1 and 15 have a structure according to the FIGS. 1 and 2 However, the roller 15 is not associated with an inductor 3.
  • the rollers 1 and 15 are connected in parallel at their rotary inlets 8, so that in the inductor 3 on the Roller 1 heated heat transfer medium behind the pump 11 to the two rollers 1 and 15 divides and merges the two partial streams after passing through the peripheral holes 2 and transfer of internal heat to the rollers 1 and 15 at the outputs of the rotary entrances 8 and re-heating the Heat transfer medium in the inductor loop 4 are pressed on the connector 9 in the hollow sections of the conductor 5.
  • roller 15 as in FIG. 3 via no further heat source, so requires a heating operation in conjunction with the roller 1 with approximately the same flow velocities of Temperiermediums that the operating overtemperature of this roller 1 on the incoming web approximately by the amount that is caused by the outer heater, higher than the operating overtemperature of Roller 15 is.
  • the outer heating of a roller 1 can be used to produce and control a process-technically necessary temperature difference to the other roller 15.
  • the roll 1 it may be advantageous or necessary to heat the roll 1 only inductively. If this involves optional operating states to be set, then the inner, convective heating of this roller can be switched off by closing the valve 17. Otherwise, it is advantageous to use as roller 1 a much cheaper roller without peripheral holes.
  • the current heat output of the inductor 3 is then fully converted into heating power of the roller 15. By moving the magnetic yoke 6 and / or by connecting or disconnecting current conductors 5 of the inductor loop 4, it can be adjusted to the limits given by the inductor design. Should the current heat output of the inductor 3 is greater than the heating power required for the production of the required operating temperature of the roller 15, the excess power is dissipated by opening the valve 13 to the heat exchanger.
  • the device according to the invention and the method make it possible to convectively transfer the heat output generated by the current flow directly outside the roll, which is generated primarily in the current conductors of the inductor and in its power supply and discharge lines, to a temperature control medium, and in that this temperature control medium flows in is circulated in a closed circuit, and that in this closed circuit, the peripheral holes 2 of a roller 1 or 15 are inserted / turned on, and that the temperature control medium between said current-carrying conductors 5 and the peripheral bores 2 of the roller 1 is circulated, and that the Inductor 3 is preferably associated with the roller 1, through the peripheral bores 2, the temperature control medium is circulated.
  • the operating temperature of the inductor 3 must be by the amount above the nip temperature, which is required for the convective transport of its resulting in the inductive heat transfer current heat to the walls of the peripheral holes 2 of the roll 1 and from there by heat conduction to the roll surface.
  • phase shift ⁇ between current and voltage at the terminals of the AC power source.
  • a large phase shift ⁇ and a correspondingly low value of the so-called power factor cos ⁇ means a high reactive current demand and a correspondingly large proportion of the current heat output of the inductor or the internal, convective in comparison to the outside, inductive heating.
  • the power factor cos ⁇ it is possible, by varying the power factor cos ⁇ , to set the ratio of the proportions of external and internal heating to one another continuously at constant heating power and correspondingly to the requirements of optimum roller operation.
  • This can be achieved, for example, by correspondingly changing the magnetic coupling of the inductor 3 to the roll 1, the power factor cos ⁇ increasing as the magnetic coupling of the inductor 3 to the roll 1 becomes narrower.
  • an increase of these distances leads to a reduction of the power factor cos ⁇ and a the corresponding increase in the internal, convective portion of the roller heating.
  • the inductor 3 is designed for operating temperatures of, for example, more than 200.degree. C.
  • the heat transfer by radiation as the decisive component of the external heating
  • the invention provides in this case so that the convective heat transfer is influenced by changing the circulation rate of the temperature control medium accordingly. If, for example, the proportion of the external heating is to be increased by amplifying the heat radiation emitted by the inductor 3, this can be achieved very rapidly by reducing the circulation rate of the temperature control medium and a corresponding, immediately occurring temperature jump of the inductor 3.
  • the heat output generated in the inductor 3 and its Stromzu- and -ableitonne can be supplied to the same, inductively surface-heated roller 1, but also another roller 15 in the calender for temperature control.
  • the method according to the invention for tempering a roller offers the possibility to operate a roller 1 with a programmable logic controller and thus adjust all occurring stationary and non-stationary operating conditions so that process-optimal parameters are achieved with high reliability without requiring a complex Temperature control is required.
  • the usual thermal power densities on roll surfaces are in stationary operation at 20 - 35 kW / m 2 .
  • roller 1, 15 with such heat outputs, one is still reliant on special, particularly high-quality roller materials in order to master the extreme thermal stresses that are caused by the temperature gradient required for the heat transfer.
  • the temperature gradients and thermal stresses in the roll body of high-performance calenders can now also be reduced to conventional values, so that cost-effective and more readily available materials can be used even in the borderline cases occurring hitherto.
  • the new method for heating rollers offers the advantageous possibility to use in a calender with multiple thermo rolls, the current heat of the inductor 3 of a roll 1 for the convective heating of another roller 15 in the same mill stand and so with an additional control variable for a optimal energy management to achieve a previously unachieved thermal efficiency not only for a roll 1, but for the calender altogether.
  • heating of a roll 1, in particular of a calender roll, by means of an alternating current source and an inductor 3 arranged outside the roll 1 is achieved and achieves a thermal efficiency of the electric heating of ⁇ th ⁇ 0.9.
  • heat pipes can be formed for example by peripheral holes 2, which protrude into the journal and individually, or communicating with each other, sealed. Trained as heat pipes hollows are filled with a suitable boiling liquid, which causes a homogenization of the roll and pin temperature or even heating or cooling.

Landscapes

  • General Induction Heating (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Physical Vapour Deposition (AREA)

Claims (19)

  1. Dispositif pour tempérer un cylindre (1), qui est muni de perçages périphériques (2), à travers lesquels est entraîné un fluide d'équilibrage des températures, avec un moyen extérieur d'équilibrage des températures, associé au cylindre (1) et agissant sur de ce dernier par l'extérieur,
    caractérisé en ce que,
    le moyen extérieur d'équilibrage des températures comporte au moins un échangeur thermique, qui avec les perçages périphériques (2) du cylindre (1) forme un circuit fermé pour le fluide d'équilibrage des températures.
  2. Dispositif selon la revendication 1,
    caractérisé en ce que,
    le moyen extérieur d'équilibrage des températures est un inducteur (3), qui en tant échangeur thermique comporte des conducteurs électriques (5) conçus sous forme de conducteurs creux, et en ce que le fluide d'équilibrage des températures est entraîné dans un circuit, aussi bien à travers les perçages périphériques (2) du cylindre (1) qu'à travers les conducteurs électriques (5) conçus sous forme de conducteurs creux.
  3. Dispositif selon la revendication 2,
    caractérisé en ce que,
    les conducteurs électriques (5) sont formés en une boucle d'inducteurs (4) et en ce que l'ensemble des conducteurs électriques (5) présente la même distance par rapport à la surface du cylindre (1).
  4. Dispositif selon la revendication 3,
    caractérisé en ce que,
    l'inducteur (3) comporte une culasse d'aimant (6) entourant la boucle d'inducteurs (4).
  5. Dispositif selon l'une quelconque des revendications 2 à 4,
    caractérisé en ce que,
    l'inducteur (3) est conçu avec une section transversale en forme de E, les conducteurs électriques (5) étant disposés entre les branches.
  6. Dispositif selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que,
    une soupape (17) est disposé dans le circuit du fluide d'équilibrage des températures.
  7. Dispositif selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que,
    un échangeur thermique (12) peut être mis en circuit dans le circuit du fluide d'équilibrage des températures.
  8. Dispositif selon l'une quelconque des revendications 2 à 7,
    caractérisé en ce que,
    entre l'inducteur (3) et le cylindre (1), un dispositif de réglage de la fente d'aération (7) est associé à l'inducteur (3).
  9. Dispositif selon l'une quelconque des revendications 2 à 8,
    caractérisé en ce que,
    les conducteurs électriques (5) sont fabriqués en cuivre et/ou en aluminium.
  10. Procédé pour tempérer des cylindres (1) par l'intermédiaire de perçages périphériques (2), à travers lesquels est entraîné un fluide d'équilibrage des températures, ainsi que par au moins un moyen extérieur d'équilibrage des températures, associé au cylindre (1) et agissant sur de ce dernier par l'extérieur,
    caractérisé en ce que,
    le moyen extérieur d'équilibrage des températures comporte des conducteurs électriques (5) conçus sous forme de conducteurs creux, à travers lesquels le fluide d'équilibrage des températures est entraîné, la puissance d'équilibrage des températures générée par les conducteurs électriques (5) étant transférée par convection sur le fluide d'équilibrage des températures et en ce que ledit fluide d'équilibrage des températures est brassé dans un circuit fermé avec les perçages périphériques (2).
  11. Procédé selon la revendication 10,
    caractérisé en ce que,
    la température de service d'un inducteur (3) conçu en tant que moyen d'équilibrage des températures est supérieure à la température de la fente d'aération du cylindre de la valeur qui est nécessaire pour le transport par convection de sa chaleur électrique naissant du transfert thermique par induction sur les parois des perçages périphériques (2) du cylindre (1) et à partir de ces dernières par conduction électrique sur la surface du cylindre.
  12. Procédé selon la revendication 10 ou 11,
    caractérisé en ce que,
    la fente d'aération (7) entre un inducteur (3) conçu en tant que moyen d'équilibrage des températures et le cylindre (1) est variable pour le réglage de l'équilibrage des températures.
  13. Procédé selon l'une quelconque des revendications 10 à 12,
    caractérisé en ce que,
    le rapport mutuel des parts extérieure et intérieure d'équilibrage des températures est influençable en cours de service du cylindre (1) par modification de la vitesse de brassage du fluide d'équilibrage des températures.
  14. Procédé selon l'une quelconque des revendications 10 à 13,
    caractérisé en ce que,
    de la chaleur excédentaire est susceptible d'être évacuée par l'intermédiaire d'un échangeur thermique (12) disposé dans une branche du circuit caloporteur faisant office de dérivation des perçages périphériques (2).
  15. Procédé selon la revendication 10 à 14,
    caractérisé en ce que,
    dans une calandre avec au moins deux cylindres (1), l'un est susceptible d'être chauffé directement par un inducteur (3), alors que l'autre est susceptible d'être chauffé par convection par l'intermédiaire du fluide d'équilibrage des températures.
  16. Procédé selon la revendication 15,
    caractérisé en ce que,
    l'inducteur (3) est associé au cylindre (1) à travers les perçages périphériques (2) duquel le fluide d'équilibrage des températures est brassé.
  17. Procédé selon l'une quelconque des revendications 11, 12, 15 ou 16,
    caractérisé en ce que,
    l'inducteur (3) est conçu pour des températures de service supérieures à 200 °C.
  18. Procédé selon l'une quelconque des revendications 10 à 17,
    caractérisé en ce que,
    le transfert thermique par convection est influencé par modification de la vitesse de brassage du fluide d'équilibrage des températures.
  19. Procédé selon l'une quelconque des revendications 10 à 18,
    caractérisé en ce que,
    il est associé à l'un des cylindres (1) un système de commande par programme enregistré, qui règle tous les états de service stationnaires ou non stationnaires qui se présentent, de sorte à obtenir des paramètres optimaux du point de vue de la technique du processus, tout en assurant une haute sécurité de fonctionnement.
EP05005469A 2005-03-14 2005-03-14 Dispositif et procédé pour le chauffage de rouleaux Not-in-force EP1703018B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05005469A EP1703018B1 (fr) 2005-03-14 2005-03-14 Dispositif et procédé pour le chauffage de rouleaux
DE502005003188T DE502005003188D1 (de) 2005-03-14 2005-03-14 Vorrichtung und Verfahren zum Temperieren von Walzen
AT05005469T ATE389061T1 (de) 2005-03-14 2005-03-14 Vorrichtung und verfahren zum temperieren von walzen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05005469A EP1703018B1 (fr) 2005-03-14 2005-03-14 Dispositif et procédé pour le chauffage de rouleaux

Publications (2)

Publication Number Publication Date
EP1703018A1 EP1703018A1 (fr) 2006-09-20
EP1703018B1 true EP1703018B1 (fr) 2008-03-12

Family

ID=34934245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05005469A Not-in-force EP1703018B1 (fr) 2005-03-14 2005-03-14 Dispositif et procédé pour le chauffage de rouleaux

Country Status (3)

Country Link
EP (1) EP1703018B1 (fr)
AT (1) ATE389061T1 (fr)
DE (1) DE502005003188D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005021069A1 (de) 2005-05-06 2006-11-09 Voith Patent Gmbh Kalander
DE102022106799A1 (de) * 2022-03-23 2023-09-28 Voith Patent Gmbh Wärmeübertragungsanlage und Verfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI71375C (fi) * 1982-12-14 1986-12-19 Valmet Oy Arrangemang foer upphettning av en vals som anvaends vid pappersframstaellning i synnerhet en kalandervals
CA1290818C (fr) * 1987-02-03 1991-10-15 George H. Wong Dispositif de chauffage de rouleau de calandre
DE3720132A1 (de) * 1987-06-16 1988-12-29 Schwaebische Huettenwerke Gmbh Vorrichtung zur behandlung einer materialbahn
FI110884B (fi) * 2002-02-15 2003-04-15 Metso Paper Inc Menetelmä lämmitettävän telan lämmön säätämiseksi kalanterissa

Also Published As

Publication number Publication date
DE502005003188D1 (de) 2008-04-24
ATE389061T1 (de) 2008-03-15
EP1703018A1 (fr) 2006-09-20

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