WO2001094868A1 - Sechoir continu avec aimants permanents a profil de temperature transversal reglable - Google Patents

Sechoir continu avec aimants permanents a profil de temperature transversal reglable Download PDF

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Publication number
WO2001094868A1
WO2001094868A1 PCT/IT2001/000287 IT0100287W WO0194868A1 WO 2001094868 A1 WO2001094868 A1 WO 2001094868A1 IT 0100287 W IT0100287 W IT 0100287W WO 0194868 A1 WO0194868 A1 WO 0194868A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
drum
permanent magnets
dryer according
magnets
Prior art date
Application number
PCT/IT2001/000287
Other languages
English (en)
Inventor
Danilo Molteni
Original Assignee
Sgm Gantry S.P.A.
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 Sgm Gantry S.P.A. filed Critical Sgm Gantry S.P.A.
Priority to AU2001274491A priority Critical patent/AU2001274491A1/en
Publication of WO2001094868A1 publication Critical patent/WO2001094868A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/008—Controlling the moisture profile across the width of the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction
    • F26B13/183—Arrangements for heating, cooling, condensate removal
    • 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

  • the present invention relates to a continuous dryer with permanent magnets, and in particular to a dryer provided with a system for adjusting the temperature profile in the direction transverse with respect to the direction of movement of the continuous sheet material which is being dried.
  • Continuous running dryers are known to comprise one or more heating metal surfaces, generally plane or cylindrical, which give heat to the material to be dried, driven on said surfaces.
  • Continuous running dryers are particularly used in the textile and paper industries for drying textiles or printed sheets respectively.
  • a problem of this type of treatment stems from the unevenness in the transverse direction of the moisture content of the material being treated.
  • the conventional solution for eliminating this unevenness is to moisten the less moist areas, detected through suitable sensors, so as to obtain a uniformly moist material.
  • the object of the present invention is to provide a dryer which is free from said drawbacks, i.e. a dryer which combines the simplicity and efficiency of permanent magnets heating with the capacity of controlling the transverse temperature profile of coil dryers.
  • the main advantage of the present dryer is exactly that of replacing the conventional temperature profile adjusting systems, which are complicated and difficult to control, with a much simpler, cheaper and more reliable system. In this way both operation and maintenance are greatly improved with respect to prior art dryers.
  • - Fig.1 shows a longitudinal section schematic view of a first embodiment of the dryer
  • - Fig.2 shows a cross-sectional schematic view of the dryer in Fig. 1 with various adjustment solutions;
  • FIG.3 shows a front schematic view of the magnetic cylinder of said dryer
  • - Fig.4 shows a cross-sectional schematic view of a second embodiment of the dryer with various adjustment solutions
  • - Fig.5 shows a front schematic view of the magnetic cylinder of the dryer in Fig.4;
  • - Fig.6 shows a longitudinal section of an enlarged detail of a modification applied to the first embodiment of Fig.1.
  • a first embodiment of the dryer comprises a cylinder 1, preferably made of ferromagnetic steel, on whose outer surface there is arranged a plurality of permanent magnets 5, regularly spaced and with alternate polarities.
  • These magnets 5 are preferably parallelepiped-shaped and characterized by a high magnetic induction and a high residual coercive force, e.g. neodymium permanent magnets.
  • the "chequered" arrangement of permanent magnets 5, clearly visible in Fig.3, causes the flux lines arising from a magnet to go back in the adjacent magnets and to be thus all linked together.
  • a. uniform magnetic field of high intensity is obtained around cylinder 1.
  • the permanent magnets 5 are preferably separated from each other by a layer of insulating material 6. ,
  • a drum 7 of electroconductive material preferably aluminum, on whose bases there are secured, aligned with the drum, two shafts 2, 2' rotatably mounted on two roller bearings 3, 3'.
  • One of the two shafts is keyed to a motor 4 whose speed of rotation can be adjusted through known control means (not shown in the figure).
  • the inner surface of drum 7 is arranged at a very small distance from the permanent magnets 5 so that the whole drum 7 is immersed, without remarkable dispersions, in the magnetic field produced by magnets 5.
  • the material 9 to be dried usually consisting of a continuous paper sheet, a continuous piece of fabric or other wound material, travels around drum 7 for about a half of its cylindrical development.
  • cylinder 1 together with magnets 5 stands still while drum 7 is rotated at a constant speed by motor 4, whereby said drum heats up due to the parasitic currents induced by the rotating magnetic field generated- by the relative rotation of cylinder 1.
  • By changing the rotation speed of drum 7 it is possible to adjust very precisely the total thermal energy supply to the material 9 to be dried yet still with an even distribution along drum 7, i.e. in the transverse direction of the material being treated.
  • a first possibility is that of making magnets 5 mobile so that they can be moved away from drum 7 in the areas where it is necessary to reduce the temperature of the latter. Obviously, this solution is applicable only when cylinder 1 has a size sufficient to receive therein the mechanisms for moving magnets 5.
  • FIGS. 1 and 2 Other external solutions are illustrated in figures 1 and 2, essentially based on the use of other magnetically active adjusting members.
  • These members may consist of dipoles 10 with permanent magnets and/or blocks 11, 12 of ferromagnetic, preferably, or diamagnetic or paramagnetic material, as long as it is not nonmagnetic material.
  • Fig.1 there is illustrated a series of dipoles 10 longitudinally aligned and arranged with alternate polarities opposite with respect to magnets 5, the distance between said dipoles 10 and the corresponding magnets 5 being adjustable (X-Y).
  • X-Y the distance between said dipoles 10 and the corresponding magnets 5 being adjustable
  • blocks 11 are mounted on cylinder 1 in magnetically neutral areas between magnets 5, and the. series of dipoles 10 is aligned with said blocks 11 rather than with magnets 5.
  • dipoles 10 are replaced by a series of external blocks 12 aligned along.magnets 5.
  • the permanent magnets 5 on cylinder 1 not in the above-described pattern illustrated in Fig.3 (i.e. regularly spaced and with alternate polarities) but rather in longitudinal rows of the same polarity and in alternate rows, as illustrated in Fig.5, as long as the magnetic field generated by magnets 5 is variable during the rotation of drum 7.
  • This different arrangement of magnets 5 obviously implies a corresponding adaptation of the adjusting members 10', 11' and 12', always keeping in mind the possibility (not shown) of making magnets 5 mobile so as to move them away from drum 7.
  • Figure 6 shows how the presence of ribs 13 separating the different adjustment areas into which drum 7 is longimdinally divided can be used to increase the inertia of the thermal exchange between said areas.
  • drum 7 has a greater thickness at the border of said areas, so that the difference of thermal flow caused by the movement of the corresponding adjusting member (e.g. external dipole 10) propagates more slowly to the adjacent areas of the drum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Drying Of Solid Materials (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

Cette invention concerne un séchoir continu comprenant un cylindre (1) sur l'extérieur duquel est disposée une pluralité d'aimants permanents (5), et un tambour rotatif (7) fait d'un matériau électriquement conducteur disposé coaxialement à l'extérieur du cylindre (1), ainsi que des dispositifs permettant de modifier localement, le long du tambour (7), l'intensité du flux magnétique qui le traverse en déplaçant des éléments de réglage magnétiquement actifs par rapport au cylindre (1). Lesdits éléments de réglage peuvent être constitués par les mêmes aimants permanents (5) rendus mobiles dans le sens radial par rapport au cylindre (1) ou par une pluralité de dipôles magnétiques (10) et/ou de blocs (12, 12') de matériau ferromagnétique disposés en dehors du tambour, et pouvant se déplacer dans le sens radial et/ou de la circonférence.
PCT/IT2001/000287 2000-06-06 2001-06-05 Sechoir continu avec aimants permanents a profil de temperature transversal reglable WO2001094868A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001274491A AU2001274491A1 (en) 2000-06-06 2001-06-05 Continuous dryer with permanent magnets having adjustability of the transverse temperature profile

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2000A001256 2000-06-06
IT2000MI001256A IT1317809B1 (it) 2000-06-06 2000-06-06 Essiccatore in continuo a magneti permanenti con regolazione delprofilo trasversale di temperatura

Publications (1)

Publication Number Publication Date
WO2001094868A1 true WO2001094868A1 (fr) 2001-12-13

Family

ID=11445197

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2001/000287 WO2001094868A1 (fr) 2000-06-06 2001-06-05 Sechoir continu avec aimants permanents a profil de temperature transversal reglable

Country Status (3)

Country Link
AU (1) AU2001274491A1 (fr)
IT (1) IT1317809B1 (fr)
WO (1) WO2001094868A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20121901A1 (it) * 2012-11-08 2014-05-09 Sgm Gantry Spa Tamburo per separatore magnetico e relativo metodo di produzione
CN111397344A (zh) * 2020-04-14 2020-07-10 诸暨潘达纺织科技有限公司 一种高效的纺织品自动脱水烘干装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761941A (en) * 1953-06-01 1956-09-04 Ardichvili Georges Roller temperature modifying apparatus
DE2204816A1 (de) * 1972-02-02 1973-08-09 Siemens Ag Regelbare anordnung zum erwaermen umlaufender gutkoerper
US3790736A (en) * 1972-10-21 1974-02-05 Koshei Arita Heating rollers
EP0067786A2 (fr) * 1981-06-16 1982-12-22 Beloit Corporation Appareil pour le chauffage de la paroi cylindrique d'un cylindre rotatif d'une machine à papier
US4384514A (en) * 1981-03-03 1983-05-24 Consolidated-Bathurst Inc. Nip control method and apparatus
US4425489A (en) * 1980-09-05 1984-01-10 Kleinewefers Gmbh Electromagnetic heating system for calender rolls or the like
US4472616A (en) * 1981-11-24 1984-09-18 Cem Compagnie Electro Mecanique Process and apparatus to obtain homogeneous transverse heating by electromagnetic induction of continuously passing long and thin products
US4675487A (en) * 1983-10-03 1987-06-23 Valmet Oy Apparatus and method for electromagnetic heating of a roll
EP0689107A1 (fr) * 1994-06-24 1995-12-27 Canon Kabushiki Kaisha Appareil de chauffage d'images
WO1997045686A1 (fr) * 1996-05-29 1997-12-04 Railfix N.V. Secheur en continu a aimants permanents
US5822669A (en) * 1995-08-29 1998-10-13 Minolta Co., Ltd. Induction heat fusing device

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761941A (en) * 1953-06-01 1956-09-04 Ardichvili Georges Roller temperature modifying apparatus
DE2204816A1 (de) * 1972-02-02 1973-08-09 Siemens Ag Regelbare anordnung zum erwaermen umlaufender gutkoerper
US3790736A (en) * 1972-10-21 1974-02-05 Koshei Arita Heating rollers
US4425489A (en) * 1980-09-05 1984-01-10 Kleinewefers Gmbh Electromagnetic heating system for calender rolls or the like
US4384514A (en) * 1981-03-03 1983-05-24 Consolidated-Bathurst Inc. Nip control method and apparatus
US4384514B1 (fr) * 1981-03-03 1989-08-01
EP0067786A2 (fr) * 1981-06-16 1982-12-22 Beloit Corporation Appareil pour le chauffage de la paroi cylindrique d'un cylindre rotatif d'une machine à papier
US4472616A (en) * 1981-11-24 1984-09-18 Cem Compagnie Electro Mecanique Process and apparatus to obtain homogeneous transverse heating by electromagnetic induction of continuously passing long and thin products
US4675487A (en) * 1983-10-03 1987-06-23 Valmet Oy Apparatus and method for electromagnetic heating of a roll
EP0689107A1 (fr) * 1994-06-24 1995-12-27 Canon Kabushiki Kaisha Appareil de chauffage d'images
US5822669A (en) * 1995-08-29 1998-10-13 Minolta Co., Ltd. Induction heat fusing device
WO1997045686A1 (fr) * 1996-05-29 1997-12-04 Railfix N.V. Secheur en continu a aimants permanents

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20121901A1 (it) * 2012-11-08 2014-05-09 Sgm Gantry Spa Tamburo per separatore magnetico e relativo metodo di produzione
WO2014072880A1 (fr) * 2012-11-08 2014-05-15 Sgm Gantry S.P.A. Tambour pour séparateur magnétique et procédé de production associé
CN104768652A (zh) * 2012-11-08 2015-07-08 Sgm台架股份公司 用于磁性分离器的鼓和相关生产方法
US9375727B2 (en) 2012-11-08 2016-06-28 Sgm Gantry S.P.A. Drum for magnetic separator and relevant production method
CN111397344A (zh) * 2020-04-14 2020-07-10 诸暨潘达纺织科技有限公司 一种高效的纺织品自动脱水烘干装置

Also Published As

Publication number Publication date
AU2001274491A1 (en) 2001-12-17
ITMI20001256A1 (it) 2001-12-06
IT1317809B1 (it) 2003-07-15
ITMI20001256A0 (it) 2000-06-06

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