EP0578971B1 - Elektrisch beheizbare Kalanderwalze - Google Patents

Elektrisch beheizbare Kalanderwalze Download PDF

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Publication number
EP0578971B1
EP0578971B1 EP93109338A EP93109338A EP0578971B1 EP 0578971 B1 EP0578971 B1 EP 0578971B1 EP 93109338 A EP93109338 A EP 93109338A EP 93109338 A EP93109338 A EP 93109338A EP 0578971 B1 EP0578971 B1 EP 0578971B1
Authority
EP
European Patent Office
Prior art keywords
metal
roll
heater elements
heatable calender
metal alloy
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
Application number
EP93109338A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0578971A1 (de
Inventor
Ludwig Dipl.-Ing. Hellenthal
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
Application filed by Walzen Irle GmbH filed Critical Walzen Irle GmbH
Publication of EP0578971A1 publication Critical patent/EP0578971A1/de
Application granted granted Critical
Publication of EP0578971B1 publication Critical patent/EP0578971B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21G1/028—Heating or cooling the rolls; Regulating the temperature using electrical means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/08—Lubricating, cooling or heating rolls internally
    • B21B2027/086—Lubricating, cooling or heating rolls internally heating internally

Definitions

  • the invention relates to a heatable calender roll for processing web-like materials with a roll body and attached to both sides of the roll body, preferably separately produced and connected to the roll neck, for example by screwing, and with electrical heating elements provided for heating.
  • Heated rollers are already known from DE-A-2 750 047.
  • longitudinal sections of rolls are heated by different means, for example gases or hot air flows, but also electrically, for example by means of inductively generated eddy currents.
  • externally heated, heat-transferring media are provided via bores in the roll body provided in roller journals underneath its jacket, axially parallel channels or a flow space formed between the inner jacket of the roller body and the outer jacket of a displacer body introduced therein introduced so that when they flow through the channels or the flow space their walls are able to heat up to a predetermined temperature, which is communicated to the roller surface.
  • the hoses connected to the roller journals in the event of their wear, can raise the risk that heat-transfer medium heated to temperatures between 100 and 200 ° is released.
  • FR-PS 13 43 136 electrical heating elements are accommodated in the interior of a hollow cylindrical roller body, which heat the roller body via a contacting, heat-transferring medium. It proves to be advantageous here that liquid only occurs in an inner, sealed system and the electrical current required for heating can be fed in without problems via slip rings.
  • DE-OS 40 16 823 recommends using a heat transfer medium to provide low-melting metal, which is melted in the range of the operating temperatures to be observed and is in the form of a melt or liquid which does not show any significant vapor pressure and which can be circulated in order to homogenize the heat transfer.
  • the temperature that can be achieved in this case proves to be too low in many cases and is also difficult to change if necessary, since it is determined by the boiling point of the liquid intended for convection.
  • Liquid metals allow higher temperatures, but are also sensitive to leaks.
  • the invention is therefore based on the object of providing a calender roll which can be heated easily and simply by means of electrical heating elements, and whose heating elements have good heat transfer to the roll body without the use of liquids or remaining gaps affecting the heat transfer.
  • This task is solved by filling the interstices surrounding the heating rods with a metal or a metal alloy, the melting point of which is above the maximum surface temperature of the heating rods reached in the company.
  • the heating rods are arranged in these channels and the spaces between the inner walls of the channels and the jackets of the heating rods are filled by the metal or the metal alloy
  • the heating elements are provided along the inner shell of the roller body and are embedded in metal or metal alloys extending up to this inner shell of the roller body, the melting temperature of which is above the maximum surface temperature of the heating rods reached during operation.
  • a calender roll 1 is shown in longitudinal section and broken off on the left-hand side, the roll body 2 of which is connected on both sides to flange pins 3, which engage in the roll body with lugs in the center and are clamped to the roll body by means of the edge regions of their flange by screws.
  • axially parallel channels 4 are arranged at relatively short intervals below its jacket, which serve to accommodate the heating elements 5, as shown in the enlarged section of FIG.
  • the heating elements 5 are inserted into the relatively long channels 4 and largely, but not completely, fill them.
  • the gaps formed here are filled with the metal 6, which thus has firm contact both with the outer jacket of the heating elements 5 and with the inner jacket of the channels 4 and thus represents a heat transfer of low resistance.
  • the flange 3 shown is equipped with two, with the use of three-phase current with three slip rings 7, which are kept fixed and electrically insulated from each other on an insulating bushing 8.
  • the contact to the slip rings is provided by brushes 9, the feed lines and holders of which are not shown to simplify the illustration.
  • the metal 6 can be a pure metal, but it can also be an alloy of two or more metals.
  • the metal or the alloys will be selected for a recommendably low thermal resistance as well as their ability to make good contact with both the jacket of the heating elements and the inner jacket of the roller body. It is taken into account here that the heat resistance of alloys increases with the alloy ratio.
  • the metal can be poured into the spaces; Here, a relatively low melting point of the metal or alloy is recommended, so that the casting can be carried out without overheating the roller body.
  • a relatively low melting point of the metal or alloy is recommended, so that the casting can be carried out without overheating the roller body.
  • pouring in or blowing in the metal or a metal alloy in the form of powder and, if possible, also for compacting or pressing.
  • roller body is shown solid in FIG. 1, although in practice at least the inner, neutral zone is often drilled out to save weight.
  • tubular roller bodies are also known which, in the case of mostly smaller wall thicknesses, dispense with separately drilled channels.
  • a displacer is inserted in such cases, which, as a passage for the heated oil, provides the space between the inner casing of the roll body and the outer casing of the displacer.
  • the heating elements 10 to be provided according to the invention can also be arranged along the inner jacket of an essentially tubular roller body 11.
  • the thermal connection can be formed by a metal 12 or a metal alloy, which is cast on, for example, by centrifugal casting after the heating elements have been introduced, so that the metal 12 rests on the one hand directly on the inner jacket of the roller body 11 and on the other hand the heating elements 10, enclosing them, embedding them.
  • a displacement body the jacket 13 of which is shown in FIG. 3 and which is either cast when Formwand works or limits the space occupied by the introduction of metal powder.
  • a heating unit that is relatively easy to procure and supply is created, which results in good and recommendable heat dissipation from the heating elements to the roller body without ⁇ sealing problems due to metal that remains stuck during operation, and that also compensates in the longitudinal direction of the rollers and reduces any temperature gradients can
  • a favorable connection is generally obtained in the case of pouring in the metal, where even the narrowest gaps are filled by the melt introduced by the capillary action.
  • the thermal conductivity and the achievable heat transfer coefficient as well as their melting point will influence the selection.
  • the thermal conductivity and the transition number will be chosen as high as possible, and the melting point only so high that a safe introduction of the melt is possible without endangering the heating elements.
  • the melting temperature of the metal or alloy it is not desirable for the melting temperature of the metal or alloy to be reached during normal operation of the calender roll.
  • the melting point can be set as high as desired.
  • materials which are themselves sensitive and additionally of filling in an inert gas for example an inert gas, and sealing it by means of sealing, casting or the like.
  • an inert gas for example an inert gas
  • the electric heater has not only proven to be useful with regard to the supply, it can also be controlled and regulated quickly and relatively easily in terms of its effectiveness, so that it is optimal Recognized temperatures of the roller surface can be brought up quickly and can be safely maintained.
  • it has proven to be expedient to make further bores or recesses in the roller body and to introduce the respective temperature-sensing sensors into them.
  • 1 shows thermocouples 14, one of which is provided in the edge region of the roller and the other of which is provided approximately in the center.
  • thermocouples 14 can be guided to the next switching station and / or to a control device via further, only slightly loaded slip rings, and can be used to display the respective temperatures, for example at the roll end and in the middle of the roll shell, and / or as a setpoint value Control device are used, which, upstream of the heating elements 5 and 10, determines their effectiveness. It is also possible to divide the heating elements 10 introduced into channels 4 or into the roller body 11 in the axial direction, so that the temperatures in the central regions of the shell of the roller body 2 and in the end regions of the shell can be adjusted separately, with the same Surface temperature can be adjusted and the individual axial sections of the heating elements can only be used to achieve the same temperatures over the length of the roll shell, or different temperatures can also be specified if necessary. Here, too, it is worthwhile to intensify the contact between the thermocouples and the walls of the channels 4 or the inner jacket of the roller body by introducing metals.
  • an AC heater is shown.
  • three-phase current is used and three or four slip rings are provided, one of which can be used for grounding in the latter case.
  • an easily heatable, reliable calender roll with a long service life is achieved.

Landscapes

  • Rolls And Other Rotary Bodies (AREA)
  • Paper (AREA)
  • Electric Clocks (AREA)
  • Switches With Compound Operations (AREA)
  • Finger-Pressure Massage (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Electrotherapy Devices (AREA)
  • Steroid Compounds (AREA)
  • Treatment Of Fiber Materials (AREA)
EP93109338A 1992-06-22 1993-06-11 Elektrisch beheizbare Kalanderwalze Expired - Lifetime EP0578971B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4220395 1992-06-22
DE4220395 1992-06-22

Publications (2)

Publication Number Publication Date
EP0578971A1 EP0578971A1 (de) 1994-01-19
EP0578971B1 true EP0578971B1 (de) 1995-09-27

Family

ID=6461540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93109338A Expired - Lifetime EP0578971B1 (de) 1992-06-22 1993-06-11 Elektrisch beheizbare Kalanderwalze

Country Status (6)

Country Link
US (1) US5397290A (fi)
EP (1) EP0578971B1 (fi)
AT (1) ATE128499T1 (fi)
CA (1) CA2098872C (fi)
DE (2) DE59300659D1 (fi)
FI (1) FI110276B (fi)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313379C2 (de) * 1993-04-23 1998-11-05 Schwaebische Huettenwerke Gmbh Heizwalze
US5882469A (en) * 1995-12-05 1999-03-16 R. R. Donnelley & Sons Company Apparatus for attaching endsheets without moisture wrinkles
DE19612324C1 (de) * 1996-03-28 1997-06-05 Jost Mueller Beheizbare Kalanderwalze
DE29614264U1 (de) * 1996-08-17 1997-12-18 Kuesters Eduard Maschf Beheizbare Walze
EP0924963A1 (en) * 1997-12-15 1999-06-23 Kabushiki Kaisha Kyushu Nissho Structure for uniform heating in a heating device
KR19990050317A (ko) * 1997-12-17 1999-07-05 토쿠모토 마사히사 가열구조체에 있어서의 균등가열구조
US6694872B1 (en) 1999-06-18 2004-02-24 Holographic Label Converting, Inc. In-line microembossing, laminating, printing, and diecutting
US6694873B1 (en) 1999-06-18 2004-02-24 Holographic Label Converting, Inc. Microembosser for faster production of holographic labels
DE19929149B4 (de) * 1999-06-27 2006-07-27 Entex Rust & Mitschke Gmbh Walzen
DE10328557B4 (de) * 2003-06-24 2005-04-14 Walzen Irle Gmbh Walze
US7594329B2 (en) * 2005-03-15 2009-09-29 Kabushiki Kaisha Toshiba Heat insulation roller and manufacturing method thereof
BRPI1002370A2 (pt) * 2010-07-01 2012-03-13 Antonio Oecksler Airton Rolo de sílica fundida com sistema de aquecimento para tempera de vidro e tratamento térmico de materiais
CN110924217B (zh) * 2019-12-17 2021-04-23 浙江金龙再生资源科技股份有限公司 一种提高纸张平滑度的软压光辊设备及软压方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8436564U1 (de) * 1985-03-28 Walzen Irle GmbH, 5902 Netphen Mittels eines Wärme übertragenden Mediums beheizbare Kalanderwalze
DE8410839U1 (de) * 1984-07-19 Walzen Irle GmbH, 5902 Netphen Mittels eines Wärme übertragenden Mediums beheizbare Kalanderwalze
FR1343136A (fr) * 1962-01-19 1963-11-15 Goodyear Tire & Rubber Appareil et procédé de calandrage
SE7613004L (sv) * 1976-11-22 1978-05-23 Asea Ab Signalomvandling.
DE2756745C2 (de) * 1977-12-20 1979-09-06 Kuesters, Eduard, 4150 Krefeld Kühlbare Walze und Verfahren zur Herstellung einer solchen Walze
US4348819A (en) * 1978-09-18 1982-09-14 Gamble James E Heated can rolls of high thermal efficiency
DE3231433C2 (de) * 1982-08-20 1985-07-11 Mannesmann AG, 4000 Düsseldorf Innengekühlte Stütz- und/oder Transportwalze und Verfahren zu ihrer Herstellung
FI71375C (fi) * 1982-12-14 1986-12-19 Valmet Oy Arrangemang foer upphettning av en vals som anvaends vid pappersframstaellning i synnerhet en kalandervals
DE3536236A1 (de) * 1985-10-10 1987-04-16 Schwaebische Huettenwerke Gmbh Beheizbare glaettwerk- oder kalanderwalze
JPS63106682A (ja) * 1986-10-23 1988-05-11 Hitachi Metals Ltd 電子写真用ヒ−トロ−ル
JP2509544B2 (ja) * 1987-08-07 1996-06-19 キヤノン株式会社 弾性回転体及びそれを有する定着装置
DE4016823C2 (de) * 1990-05-25 1995-02-02 Kuesters Eduard Maschf Beheizbare Walze, insbesondere Kalanderwalze
DE4033986A1 (de) * 1990-08-09 1992-02-13 Schwaebische Huettenwerke Gmbh Walze mit heizeinrichtung
FI92733C (fi) * 1990-08-15 1994-12-27 Valmet Paper Machinery Inc Kuumennettava tela
US5171404A (en) * 1990-11-30 1992-12-15 S. D. Warren Company Method and apparatus for calendering paper with internally heated roll
US5177552A (en) * 1990-12-13 1993-01-05 Minolta Camera Kabushiki Kaisha Thermal roller fixing device for thermally fixing a toner image in electronic copying machines

Also Published As

Publication number Publication date
ATE128499T1 (de) 1995-10-15
US5397290A (en) 1995-03-14
DE59300659D1 (de) 1995-11-02
EP0578971A1 (de) 1994-01-19
CA2098872C (en) 2003-12-23
FI110276B (fi) 2002-12-31
CA2098872A1 (en) 1993-12-23
FI932864A0 (fi) 1993-06-21
FI932864A (fi) 1993-12-23
DE4319868A1 (de) 1993-12-23

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