EP0495780A1 - Armature de bobine pour le chauffage inductif de cylindres. - Google Patents

Armature de bobine pour le chauffage inductif de cylindres.

Info

Publication number
EP0495780A1
EP0495780A1 EP90910553A EP90910553A EP0495780A1 EP 0495780 A1 EP0495780 A1 EP 0495780A1 EP 90910553 A EP90910553 A EP 90910553A EP 90910553 A EP90910553 A EP 90910553A EP 0495780 A1 EP0495780 A1 EP 0495780A1
Authority
EP
European Patent Office
Prior art keywords
front surface
coil body
coil
cooling
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90910553A
Other languages
German (de)
English (en)
Other versions
EP0495780B1 (fr
Inventor
Bernhard Brendel
Werner Borkenhagen
Bernhard Funger
Stefan Krebs
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.)
Eduard Kuesters Maschinenfabrik GmbH and Co KG
Original Assignee
Eduard Kuesters Maschinenfabrik GmbH and Co KG
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 Eduard Kuesters Maschinenfabrik GmbH and Co KG filed Critical Eduard Kuesters Maschinenfabrik GmbH and Co KG
Publication of EP0495780A1 publication Critical patent/EP0495780A1/fr
Application granted granted Critical
Publication of EP0495780B1 publication Critical patent/EP0495780B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/14—Tools, e.g. nozzles, rollers, calenders
    • H05B6/145—Heated rollers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/42—Cooling of coils

Definitions

  • the invention relates to a bobbin which corresponds to the preamble of claim 1.
  • Such a coil former is known from EP-OS 59 421.
  • the inductive heating of rollers serves to increase the temperature of the roller surface in order to be able to carry out the pressure treatment of the web material treated by the roller at a higher temperature, for example to be able to calender a paper web at a higher temperature.
  • a large number of bobbins of the type in question are arranged side by side along the roll surface, which raise the overall temperature level, but can also be controlled separately in order to set a specific temperature profile. be it because the paper web requires a temperature increase at a certain point, be it to increase the roll diameter and thus the line pressure at the relevant point by means of a local temperature increase.
  • the coil formers are only shown schematically in EP-OS 59 421. In practice, they consist of a plastic block, the front of which is geometrically adapted to the circumference of the roller, ie is partially cylindrical. Tight Below the partially cylindrical front surface, the actual coil is embedded in the plastic block, which consists of a strand with many individual wires, which has an approximately rectangular cross section. The strand is wound into a spiral, the cross section standing upright. The spiral extends in a partially cylindrical area in the plastic block. It faces the roller surface without contact and at a short distance.
  • This coil is loaded at a medium frequency, for example in the range from 15 to 18 kHz. Because of this relatively high frequency, the coil wire must be configured as a strand with individual enamel-insulated wires. The coil is connected to an oscillating circuit, the voltage of which is approximately 800 volts.
  • the object of the invention is to make a bobbin of the generic type suitable for higher working temperatures. _ - _
  • the result of the cooling element is that the temperature of the front surface of the plastic carrier can be kept so low that no destruction takes place and the higher temperatures on the roller surface can be endured for long periods of time. Tests have shown perfect operation over 42 hours.
  • the cooling element is formed by a cooling chamber through which a fluid cooling medium can flow.
  • the fluid cooling medium not only has the function of dissipating heat from the area of the front surface of the plastic carrier, but at the same time keeps the radiation emanating from the roller surface away from this front surface.
  • the heat output to be dissipated is about 100 watts for a commercially available coil body of normal size, which can be achieved by a fluid cooling medium even without a large throughput.
  • cooling chamber can be designed according to claim 3.
  • the preferred cooling medium is water (claim 4).
  • DE-PS 34 38 375 shows that an inductive conductor of cooling water can flow through. In the known embodiment, however, it is only a conductor loop made from a solid copper tube. However, the invention relates to a higher power concentration, which makes higher frequencies and higher number of turns necessary and in which a direct flow through the individual conductor is no longer feasible.
  • An important embodiment of the invention is to design the boundary surface of the cooling element facing the roller to increase reflection (claim 5).
  • the reflection element of the cooling element cannot be increased by metallization or by attaching metallic mirror elements, because these are subject to the induction effect and would also be heated. Rather, it is necessary to increase the degree of whiteness and glossiness flexionshunt highest possible re ", ie the highest possible ratio herbeizu ⁇ lead to the incident amount of radiation reflected.
  • FIG. 1 shows a side view of a bobbin arranged on a roller surface, partly in section
  • FIG. 2 shows a view according to FIG. 1 from the left along the line II-II in FIG. 1;
  • FIG. 3 shows a partial cross section along the line III-III in FIG. 2.
  • the coil body designated 100 as a whole in FIG. 1 comprises a plastic carrier 1 in the form of a cuboid block with a partially cylindrical front surface 2 which is adapted to the outer circumference 3 of a rotating roller 4, i.e. is coaxial.
  • the revolving roller 4 is shown as a hollow roller made of steel, which extends lengthways from an unillustrated crosshead and is supported from the inside on the non-rotatable crosshead by means of hydraulic support devices.
  • an induction coil 5 shown only in its outline in FIG. 1, the axis of which is perpendicular to the roller surface and which runs spirally in a partially cylindrical region 6 that is coaxial with the front surface 2 or the circumference of the roller 3.
  • the coil wire 7 is formed by a strand 8 with a large number of individual wires 9 which are insulated from one another.
  • the cross section of the coil wire 7 is rectangular, the length of the rectangle being a multiple of the width. As can be seen from Fig. 3 stands _ c
  • the coil wire is upright, i.e. with the longer cross-sectional rectangle sides perpendicular to the roller circumference 3.
  • the "plan" of the coil 5 can be seen in FIG. 2 and is indicated by the course of the center line 10 of the coil wire 7.
  • the coil wire 7 runs with its center line 10 from the feed line 11 along a rectangular (adapted to the cross section of the plastic carrier 1) spiral path from the feed line 11 to the return line 12 and thus forms a spiral coil with six turns in the exemplary embodiment .
  • the coil 5 is cast into the material of the plastic carrier 1.
  • the front surface 2 of the plastic carrier is cast into the material of the plastic carrier 1.
  • front of the front surface 2 is a flat surface designated as a whole by 20, the front surface
  • cooling element which is designed as a cooling chamber 13 through which cooling water 14 flows.
  • the cooling chamber 13 is delimited by a web 15 which surrounds the front surface 2 and on which a cover 16 in the form of a thin plastic sheet, for example 1 mm thick, is tightly applied, so that the cooling chamber 13 except for the inlet 17 and the Process 18 is closed. Since the circumferential web 15 all around a constant height of, for example
  • the cover 16 automatically assumes a shape adapted to the roller circumference 3 and is opposite the roller circumference 3 during operation with the smallest possible distance.
  • the height of the chamber 13 should be as low as possible be so that the coil 5 can be moved as close as possible to the roller circumference 3 despite the presence of the cooling element 20, which accommodates the efficiency of the inductive heating by the coil 5.
  • the surface of the sheet-shaped cover 16 of the cooling chamber 13 facing the roller periphery 3 is white and shiny in order to reflect as large a portion of the heat radiated from the roller periphery 3 as possible.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

Une bobine inductive (5) pour le chauffage d'un cylindre tournant (4) est logée dans un support en plastique (1). Pour le refroidissement du support en plastique (1) à proximité de la bobine (5) est prévu, sur la face avant (2) du support en plastique du côté circonférence du cylindre (3), un élément de refroidissement (20) se présentant sous la forme d'une chambre de refroidissement plate (13) traversée par un fluide réfrigérant.
EP90910553A 1989-10-13 1990-07-24 Armature de bobine pour le chauffage inductif de cylindres Expired - Lifetime EP0495780B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3934208 1989-10-13
DE3934208A DE3934208C2 (de) 1989-10-13 1989-10-13 Spulenkörper für die induktive Beheizung von Walzen

Publications (2)

Publication Number Publication Date
EP0495780A1 true EP0495780A1 (fr) 1992-07-29
EP0495780B1 EP0495780B1 (fr) 1993-07-14

Family

ID=6391403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90910553A Expired - Lifetime EP0495780B1 (fr) 1989-10-13 1990-07-24 Armature de bobine pour le chauffage inductif de cylindres

Country Status (8)

Country Link
US (1) US5283409A (fr)
EP (1) EP0495780B1 (fr)
JP (1) JPH077702B2 (fr)
CA (1) CA2067137C (fr)
DE (2) DE3934208C2 (fr)
FI (1) FI100447B (fr)
RU (1) RU2069453C1 (fr)
WO (1) WO1991006194A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1034929C (zh) * 1993-04-13 1997-05-21 西巴-盖尔基股份公司 抑制鸟氨酸脱羧酶的环状氨基氧基化合物及其用途

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US5645744A (en) 1991-04-05 1997-07-08 The Boeing Company Retort for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5723849A (en) 1991-04-05 1998-03-03 The Boeing Company Reinforced susceptor for induction or resistance welding of thermoplastic composites
US7126096B1 (en) 1991-04-05 2006-10-24 Th Boeing Company Resistance welding of thermoplastics in aerospace structure
US5728309A (en) 1991-04-05 1998-03-17 The Boeing Company Method for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5641422A (en) 1991-04-05 1997-06-24 The Boeing Company Thermoplastic welding of organic resin composites using a fixed coil induction heater
US5808281A (en) 1991-04-05 1998-09-15 The Boeing Company Multilayer susceptors for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5624594A (en) 1991-04-05 1997-04-29 The Boeing Company Fixed coil induction heater for thermoplastic welding
US5793024A (en) 1991-04-05 1998-08-11 The Boeing Company Bonding using induction heating
US5508496A (en) * 1991-10-18 1996-04-16 The Boeing Company Selvaged susceptor for thermoplastic welding by induction heating
US5500511A (en) * 1991-10-18 1996-03-19 The Boeing Company Tailored susceptors for induction welding of thermoplastic
US5444220A (en) * 1991-10-18 1995-08-22 The Boeing Company Asymmetric induction work coil for thermoplastic welding
FR2693073A1 (fr) * 1992-06-24 1993-12-31 Celes Dispositif de protection et de refroidissement des pôles d'un inducteur électro-magnétique.
US5710412A (en) * 1994-09-28 1998-01-20 The Boeing Company Fluid tooling for thermoplastic welding
US5660669A (en) * 1994-12-09 1997-08-26 The Boeing Company Thermoplastic welding
US5573613A (en) * 1995-01-03 1996-11-12 Lunden; C. David Induction thermometry
US5486684A (en) * 1995-01-03 1996-01-23 The Boeing Company Multipass induction heating for thermoplastic welding
US5717191A (en) * 1995-06-06 1998-02-10 The Boeing Company Structural susceptor for thermoplastic welding
US5705795A (en) * 1995-06-06 1998-01-06 The Boeing Company Gap filling for thermoplastic welds
US6602810B1 (en) 1995-06-06 2003-08-05 The Boeing Company Method for alleviating residual tensile strain in thermoplastic welds
US5756973A (en) * 1995-06-07 1998-05-26 The Boeing Company Barbed susceptor for improviing pulloff strength in welded thermoplastic composite structures
US5829716A (en) * 1995-06-07 1998-11-03 The Boeing Company Welded aerospace structure using a hybrid metal webbed composite beam
US5556565A (en) * 1995-06-07 1996-09-17 The Boeing Company Method for composite welding using a hybrid metal webbed composite beam
US5568235A (en) * 1995-06-22 1996-10-22 Xerox Corporation Induction heated intermediate transfer member
US5760379A (en) * 1995-10-26 1998-06-02 The Boeing Company Monitoring the bond line temperature in thermoplastic welds
US5916469A (en) * 1996-06-06 1999-06-29 The Boeing Company Susceptor integration into reinforced thermoplastic composites
US5869814A (en) * 1996-07-29 1999-02-09 The Boeing Company Post-weld annealing of thermoplastic welds
US5902935A (en) 1996-09-03 1999-05-11 Georgeson; Gary E. Nondestructive evaluation of composite bonds, especially thermoplastic induction welds
US6284089B1 (en) * 1997-12-23 2001-09-04 The Boeing Company Thermoplastic seam welds
DE19921546B4 (de) * 1999-05-11 2004-03-25 Friedrich Von Rohrscheidt Folienlaminator
US8770732B2 (en) 2010-12-08 2014-07-08 Xerox Corporation Inductive heater for a solid ink reservoir
CN102802291B (zh) * 2012-08-09 2014-06-04 杭州卓达节能设备有限公司 内置式电磁加热辊
JP6111696B2 (ja) * 2013-01-30 2017-04-12 株式会社リコー 定着装置及び画像形成装置
DE102013008068A1 (de) * 2013-05-10 2014-11-13 Oerlikon Textile Gmbh & Co. Kg Verfahren und Vorrichtung zur Bestimmung einer Oberflächentemperatur eines induktiv beheizten Walzenmantels

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US2277223A (en) * 1941-04-26 1942-03-24 Induction Heating Corp Electric induction furnace
US2351300A (en) * 1942-05-25 1944-06-13 Budd Induction Heating Inc Induction heating apparatus
US3674247A (en) * 1970-03-27 1972-07-04 Park Ohio Industries Inc Apparatus and method of inductively heating and quench hardening an elongated workpiece
CH573992A5 (fr) * 1973-11-02 1976-03-31 Rieter Ag Maschf
SU748918A1 (ru) * 1977-12-26 1980-07-15 Московский Ордена Ленина Энергетический Институт Устройство дл индукционного нагрева
US4251705A (en) * 1979-05-14 1981-02-17 Park-Ohio Industries, Inc. Inductor for hardening gear teeth
FR2457619A2 (fr) * 1979-05-23 1980-12-19 Siderurgie Fse Inst Rech Four de rechauffage a induction a champ glissant
US4384514A (en) * 1981-03-03 1983-05-24 Consolidated-Bathurst Inc. Nip control method and apparatus
DE3438375A1 (de) * 1984-10-19 1986-04-24 Küsters, Eduard, 4150 Krefeld Einrichtung zur induktiven beheizung von walzen
US4621177A (en) * 1985-03-27 1986-11-04 Beloit Corporation Inductor configuration for eddy current heating in the papermaking process
FR2630612B1 (fr) * 1988-04-26 1996-05-24 Siderurgie Fse Inst Rech Dispositif de protection des poles d'inducteurs et inducteur pourvu de ce dispositif
US5101086A (en) * 1990-10-25 1992-03-31 Hydro-Quebec Electromagnetic inductor with ferrite core for heating electrically conducting material

Non-Patent Citations (1)

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Title
See references of WO9106194A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1034929C (zh) * 1993-04-13 1997-05-21 西巴-盖尔基股份公司 抑制鸟氨酸脱羧酶的环状氨基氧基化合物及其用途

Also Published As

Publication number Publication date
FI921591A (fi) 1992-04-10
FI921591A0 (fi) 1992-04-10
DE3934208C2 (de) 1994-02-17
US5283409A (en) 1994-02-01
DE59001980D1 (de) 1993-08-19
CA2067137C (fr) 1997-05-20
JPH077702B2 (ja) 1995-01-30
CA2067137A1 (fr) 1991-04-14
DE3934208A1 (de) 1991-04-25
EP0495780B1 (fr) 1993-07-14
WO1991006194A1 (fr) 1991-05-02
FI100447B (fi) 1997-11-28
RU2069453C1 (ru) 1996-11-20
JPH05500433A (ja) 1993-01-28

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