US3790736A - Heating rollers - Google Patents

Heating rollers Download PDF

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Publication number
US3790736A
US3790736A US00308397A US3790736DA US3790736A US 3790736 A US3790736 A US 3790736A US 00308397 A US00308397 A US 00308397A US 3790736D A US3790736D A US 3790736DA US 3790736 A US3790736 A US 3790736A
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United States
Prior art keywords
roller
magnetic
sleeve
open end
boss
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
US00308397A
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English (en)
Inventor
S Matsumura
M Konno
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KOSHEI ARITA
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KOSHEI ARITA
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Filing date
Publication date
Application filed by KOSHEI ARITA filed Critical KOSHEI ARITA
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Publication of US3790736A publication Critical patent/US3790736A/en
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    • 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

Definitions

  • ABSTRACT 30 Foreign Application p i i Data In a hgating roller of the ltlype comprising abcylindrkifil cup s ape magnetic r0 er, a magnetic oss at t e Get.
  • a heating roller of the type described above is used to heat a synthetic fiber which is required to be heated at an extremely constant temperature.
  • a heating roller of the prior art construction comprises a cylindrical roller 1 having a cylindrical boss extending to the opening of the cylinder from the center of the bottom thereof. The opening of the cylindrical boss 2 is tapered to receive a rotary shaft 3.
  • a heat generating layer 4 made of an electric conductive material.
  • a stationary sleeve 5 having radial flanges 5 and 5, on the opposite ends is provided to surround the boss 2 and shaft 3.
  • the diameter of the inner flange 5 is made smaller than the inner diameter of the roller 5 whereas the outer flange 5 is disposed to oppose a flange formed on the open end of the roller with a definite axial spacing therebetween.
  • An exciting coil 6 is wound about sleeve 5.
  • the exciting coil 6 When the exciting coil 6 is energized by alternating current, magnetic flux is generated to flow through the cylindrical roller, the outer flange 5 and the sleeve 5 as shown by dotted lines. Accordingly, the roller 1 is heated by the short circuit current induced in the heat generating layer 4, eddy current induced in the roller 1 and the hysteresis loss therein. The heated roller 1 is rotated by shaft 3 and the substance to be heated such as artificial fibers and chemical fibers which are brought into contact with the peripheral surface of the roller is efficiently heat treated.
  • Another object of this invention is to provide an improved heating roller capable of uniformly heating the objects to be heated at high efficiencies.
  • Yet another object of this invention is to provide a
  • novel heating roller which can eliminate the thrust load acting upon the driving shaft.
  • a heating roller of the type comprising a cylindrical cup shaped magnetic roller, a magnetic boss connected to the center of the inner surface of the bottom of the roller, a driving shaft connected to the boss, a stationary magnetic sleeve surrounding the boss and the shaft, a magnetic radial flange secured to one end of the sleeve to confront the open end of the roller and an exciting coil disposed in a space between the roller and the sleeve, characterized in that a magnetic ring is secured to the outer end of the radial flange, the ring extending in the axial direction to surround the peripheral surface of the open end of the roller with a narrow air gap therebetween which extends in the axial direction of the roller.
  • Various means are provided to assure uniform heat distribution of the surface of the heating roller.
  • conductive layers are secured either on the inner surface or the open end of the roller or on the inner surface of the bottom of the roller.
  • a non-magnetic disc is secured to the inner end of the sleeve to cause the magnetic flux to flow through the boss and the sleeve.
  • FIG. 1 shows a diagrammatic longitudinal section of a prior art heating roller
  • FIG. 2 shows a longitudinal section of one embodiment of this invention.
  • FIGS. 3 to 6 are partiallongitudinal sectional view of different embodiments of this invention. Throughout the drawings, like or corresponding portions are designated by the same reference characters.
  • the roller 1 is provided at its open end with a radially extending flange 1 having an axial circumferential surface.
  • the outer flange 5 of the magnetic sleeve 5 has an inwardly projecting cylindrical ring 5 which surrounds the circumferential surface of the flange l, with an air gap g extending in the axial direction.
  • the spacing g between the inner surface of the flange 5 and the open end of the roller 1 is made larger than said air gap g.
  • On the inner end of the magnetic sleeve 5 is secured a non-magnetic radial disc 5a to face the bottom of the roller 1.
  • the disc 5a is used for the purpose of holding the exciting coil 6 to cause the magnetic flux to flow through the inner end of the boss 2.
  • the spacing between the inner wall of the bottom of the roller and the radial disc 5a is made smaller than the spacing 3., between the inner wall and the inner end of sleeve 5.
  • the non-magnetic disc 5a is provided between the and since the spacing g between the inner end of the sleeve 5 and the inner wall of the bottom of the roller 1 is made sufficiently large the magnetic flux flows to the center of the bottom of the roller through boss 2 of magnetic material.
  • By virtue of such magnetic circuit it is possible to greatly decrease attractive force acting between the open end of the roller and the radial flange 5, and between the inner end of the sleeve 5 and the bottom of the roller 1, thereby decreasing the thrust load acting upon the driving shaft 3, whereby the damage to the bearing of the shaft can be minimized. Since the air gap g between the roller 1 and the radial flange 5 is small, the attractive force acting upon the peripheral surface of the open end of the sleeve 5 is large.
  • roller 1 is heated uni formly. More particularly, the right-hand end of the exciting coil 6 is exposed over a distance of 3 so that more flux links the flange 1 thereby heating it strongly.
  • the dissipation of the heat generated in flange 1 is efficiently prevented by the overlying ring 5 thereby preventing the temperature of the open end of the roller 1 from being lowered.
  • FIG. 3 diagrammatically illustrates a modified embodiment of this invention wherein an annular conductor ring 10 is secured to the inner wall of the bottom of the roller 1 and a second annular conductor ring is secured to the open end of the roller 1 to face the inner side of the radial flange 5
  • short circuit currents are induced in the rings 10 and 20 to prevent'the temperature at the opposite ends of the roller from decreasing, thus assuring uniform heat distribution.
  • annular grooves and are formed on predetermined portions along the inner wall of the cylindrical roller 1 for the purpose of adjusting the heat distribution thereof more precisely. These annular grooves permit selection of any value of the resistance of the roller for adjustment of the heat distribution of the roller 1.
  • electric conductor layers 50 and 60 are applied on the inner surface of the roller 1 for increasing the heating capacity thereof.
  • short circuit currents are also induced in these conductor layers so that the heat generating capacity is increased from that of the embodiment shown in FIG. 3.
  • the heat distribution of the embodiment shown in FIG. 5 is more finely adjusted.
  • the conductor layers 50 and 60 are provided with grooves or notches 70 and 80, respectively, for the purpose of adjusting their resistance values, and hence the heat distribution of the roller 1.
  • this invention provides an improved heating roller wherein the axial spacing between the open end of the roller and the radial flange of the sleeve is increased and the air gap therebetween is formed in the axial direction so that it is possible to decrease the thrust load upon the driving shaft'as well as the damage to the bearing supporting the shaft. Moreover, as the exciting coil is protruded beyond the open end of the roller, the heating of the open end is increased by the leakage flux from the exposed portion of the exciting coil, thus assuring uniform heating of the roller.
  • the air in the roller is more effectively sealed thus preserving the heat and increasing the heat efficiency.
  • Increased axial distance between the open end of the roller and the radial flange of the sleeve alleviates the accuracy of the machining.
  • provision of the short circuit ring or the annular groove on the inner surface of the roller ensures more uniform heat distribution in the axial direction of the roller.
  • a heating roller comprising a cylindrical cup shaped magnetic roller, a magnetic boss connected to the center of the inner surface of the bottom of the roller, a driving shaft connected to said boss, a stationary magnetic sleeve surrounding said boss and said shaft with one end terminating in axially spaced relation to said inner surface, a magnetic radial flange secured to the other end of said sleeve to confront the open end of said roller in axially spaced relation thereto, an exciting coil disposed in a space between said roller and said sleeve, a magnetic ring secured to the outer end of said radial flange, said ring extending in the axial direction to surround the peripheral surface of the open end of said roller with a narrow air gap which extends in the axial direction of said roller, both of said spaced relations providing axial air gaps in the magnetic path through said roller and sleeve which are substantially greater than the air gaps provided by the radial spacing between said magnetic sleeve and said boss and between said ring and said open end of

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
US00308397A 1972-10-21 1972-11-21 Heating rollers Expired - Lifetime US3790736A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47105664A JPS4964038A (da) 1972-10-21 1972-10-21

Publications (1)

Publication Number Publication Date
US3790736A true US3790736A (en) 1974-02-05

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ID=14413689

Family Applications (1)

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US00308397A Expired - Lifetime US3790736A (en) 1972-10-21 1972-11-21 Heating rollers

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US (1) US3790736A (da)
JP (1) JPS4964038A (da)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208560A (en) * 1974-10-16 1980-06-17 Barmag Barmer Maschinenfabrik Ag Inductively heated godet
DE19854034A1 (de) * 1998-11-16 2000-05-18 Walzen Irle Gmbh Induktionsheizung für Thermowalzen
WO2001094868A1 (en) * 2000-06-06 2001-12-13 Sgm Gantry S.P.A. Continuous dryer with permanent magnets having adjustability of the transverse temperature profile
WO2002095104A1 (de) * 2001-05-25 2002-11-28 Barmag Ag Galette
US20050205555A1 (en) * 2004-03-17 2005-09-22 Matsushita Electric Industrial Co., Ltd. Heating apparatus fusing apparatus and image forming apparatus
DE102007054147A1 (de) * 2007-11-12 2009-05-20 Khs Ag Leimwalze sowie Etikettieraggregat mit einer solchen Leimwalze
CN108085820A (zh) * 2016-11-23 2018-05-29 里特电子有限公司 可电加热的导丝辊和用电加热导丝辊的方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3435171A (en) * 1965-12-03 1969-03-25 Barmag Barmer Maschf Heated galette
GB1172586A (en) * 1966-11-22 1969-12-03 Barmag Barmer Maschf Improvements relating to an Electrically Heated Godet
US3487187A (en) * 1967-08-16 1969-12-30 Barmag Barmer Maschf Inductively heatable galette
US3529116A (en) * 1964-11-21 1970-09-15 Tokushu Denki Kk Heating rotary drum apparatus having shaped flux pattern
US3600550A (en) * 1969-09-11 1971-08-17 Mitsubishi Heavy Ind Ltd Method of and apparatus for heating a rotary roll
US3701873A (en) * 1969-09-25 1972-10-31 Barmag Barmer Maschf Inductively heated godet
US3731034A (en) * 1972-03-23 1973-05-01 K Arita Heating rollers with axial magnetic force reduction means

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136286U (da) * 1974-09-11 1976-03-17

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529116A (en) * 1964-11-21 1970-09-15 Tokushu Denki Kk Heating rotary drum apparatus having shaped flux pattern
US3435171A (en) * 1965-12-03 1969-03-25 Barmag Barmer Maschf Heated galette
GB1172586A (en) * 1966-11-22 1969-12-03 Barmag Barmer Maschf Improvements relating to an Electrically Heated Godet
US3487187A (en) * 1967-08-16 1969-12-30 Barmag Barmer Maschf Inductively heatable galette
US3600550A (en) * 1969-09-11 1971-08-17 Mitsubishi Heavy Ind Ltd Method of and apparatus for heating a rotary roll
US3701873A (en) * 1969-09-25 1972-10-31 Barmag Barmer Maschf Inductively heated godet
US3731034A (en) * 1972-03-23 1973-05-01 K Arita Heating rollers with axial magnetic force reduction means

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208560A (en) * 1974-10-16 1980-06-17 Barmag Barmer Maschinenfabrik Ag Inductively heated godet
DE19854034A1 (de) * 1998-11-16 2000-05-18 Walzen Irle Gmbh Induktionsheizung für Thermowalzen
US6278094B1 (en) 1998-11-16 2001-08-21 Walzen Irle Gmbh Induction heating for thermal rollers
WO2001094868A1 (en) * 2000-06-06 2001-12-13 Sgm Gantry S.P.A. Continuous dryer with permanent magnets having adjustability of the transverse temperature profile
WO2002095104A1 (de) * 2001-05-25 2002-11-28 Barmag Ag Galette
US20050205555A1 (en) * 2004-03-17 2005-09-22 Matsushita Electric Industrial Co., Ltd. Heating apparatus fusing apparatus and image forming apparatus
US7129448B2 (en) * 2004-03-17 2006-10-31 Matsushita Electric Industrial Co., Ltd. Heating apparatus fusing apparatus and image forming apparatus
DE102007054147A1 (de) * 2007-11-12 2009-05-20 Khs Ag Leimwalze sowie Etikettieraggregat mit einer solchen Leimwalze
US20100282363A1 (en) * 2007-11-12 2010-11-11 Kraemer Klaus Beverage bottling plant with heated information-adding equipment and information-adding equipment
US9725200B2 (en) 2007-11-12 2017-08-08 Khs Gmbh Beverage bottling plant with heated information-adding equipment and information-adding equipment
CN108085820A (zh) * 2016-11-23 2018-05-29 里特电子有限公司 可电加热的导丝辊和用电加热导丝辊的方法

Also Published As

Publication number Publication date
JPS4964038A (da) 1974-06-21

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