EP0495780A1 - Spulenkörper für die induktive beheizung von walzen. - Google Patents
Spulenkörper für die induktive beheizung von walzen.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
Links
- 230000001939 inductive effect Effects 0.000 title claims abstract description 8
- 238000010438 heat treatment Methods 0.000 title claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 239000004033 plastic Substances 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 239000002826 coolant Substances 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000009969 flowable effect Effects 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 abstract 1
- 230000006698 induction Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3934208A DE3934208C2 (de) | 1989-10-13 | 1989-10-13 | Spulenkörper für die induktive Beheizung von Walzen |
DE3934208 | 1989-10-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0495780A1 true EP0495780A1 (de) | 1992-07-29 |
EP0495780B1 EP0495780B1 (de) | 1993-07-14 |
Family
ID=6391403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90910553A Expired - Lifetime EP0495780B1 (de) | 1989-10-13 | 1990-07-24 | Spulenkörper für die induktive beheizung von walzen |
Country Status (8)
Country | Link |
---|---|
US (1) | US5283409A (de) |
EP (1) | EP0495780B1 (de) |
JP (1) | JPH077702B2 (de) |
CA (1) | CA2067137C (de) |
DE (2) | DE3934208C2 (de) |
FI (1) | FI100447B (de) |
RU (1) | RU2069453C1 (de) |
WO (1) | WO1991006194A1 (de) |
Cited By (1)
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 |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US5793024A (en) | 1991-04-05 | 1998-08-11 | The Boeing Company | Bonding using induction heating |
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 |
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 |
US5624594A (en) | 1991-04-05 | 1997-04-29 | The Boeing Company | Fixed coil induction heater for thermoplastic welding |
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 |
US5508496A (en) * | 1991-10-18 | 1996-04-16 | The Boeing Company | Selvaged susceptor for thermoplastic welding by induction heating |
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 |
US6602810B1 (en) | 1995-06-06 | 2003-08-05 | The Boeing Company | Method for alleviating residual tensile strain in thermoplastic welds |
US5705795A (en) * | 1995-06-06 | 1998-01-06 | The Boeing Company | Gap filling for thermoplastic welds |
US5556565A (en) * | 1995-06-07 | 1996-09-17 | The Boeing Company | Method for composite welding using a hybrid metal webbed composite beam |
US5829716A (en) * | 1995-06-07 | 1998-11-03 | The Boeing Company | Welded aerospace structure using a hybrid metal webbed composite beam |
US5756973A (en) * | 1995-06-07 | 1998-05-26 | The Boeing Company | Barbed susceptor for improviing pulloff strength in welded thermoplastic composite structures |
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 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 (de) * | 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 |
-
1989
- 1989-10-13 DE DE3934208A patent/DE3934208C2/de not_active Expired - Fee Related
-
1990
- 1990-07-24 WO PCT/DE1990/000561 patent/WO1991006194A1/de active IP Right Grant
- 1990-07-24 CA CA002067137A patent/CA2067137C/en not_active Expired - Fee Related
- 1990-07-24 DE DE9090910553T patent/DE59001980D1/de not_active Expired - Fee Related
- 1990-07-24 EP EP90910553A patent/EP0495780B1/de not_active Expired - Lifetime
- 1990-07-24 JP JP2510252A patent/JPH077702B2/ja not_active Expired - Fee Related
- 1990-07-24 RU SU905011774A patent/RU2069453C1/ru active
-
1992
- 1992-04-10 FI FI921591A patent/FI100447B/fi active
- 1992-04-13 US US07/847,084 patent/US5283409A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9106194A1 * |
Cited By (1)
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 |
---|---|
CA2067137C (en) | 1997-05-20 |
DE59001980D1 (de) | 1993-08-19 |
FI921591A (fi) | 1992-04-10 |
EP0495780B1 (de) | 1993-07-14 |
JPH077702B2 (ja) | 1995-01-30 |
JPH05500433A (ja) | 1993-01-28 |
RU2069453C1 (ru) | 1996-11-20 |
US5283409A (en) | 1994-02-01 |
FI100447B (fi) | 1997-11-28 |
CA2067137A1 (en) | 1991-04-14 |
DE3934208C2 (de) | 1994-02-17 |
DE3934208A1 (de) | 1991-04-25 |
WO1991006194A1 (de) | 1991-05-02 |
FI921591A0 (fi) | 1992-04-10 |
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