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 PDFInfo
- 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
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
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)
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)
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 |
-
2000
- 2000-06-06 IT IT2000MI001256A patent/IT1317809B1/it active
-
2001
- 2001-06-05 WO PCT/IT2001/000287 patent/WO2001094868A1/fr active Application Filing
- 2001-06-05 AU AU2001274491A patent/AU2001274491A1/en not_active Abandoned
Patent Citations (12)
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)
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 |
---|---|
IT1317809B1 (it) | 2003-07-15 |
AU2001274491A1 (en) | 2001-12-17 |
ITMI20001256A0 (it) | 2000-06-06 |
ITMI20001256A1 (it) | 2001-12-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4775773A (en) | Method and apparatus for controlling thickness of a web in a calendering nip | |
FI83895B (fi) | Foerfarande och anordning vid pressbehandling av en pappersbana. | |
EP0196264B1 (fr) | Configuration d'inducteur pour le chauffage par courant de Foucault dans le processus de fabrication de papier | |
CA1298508C (fr) | Methode permettant de separer la toile du rouleau presseur, dans la section presses d'une machine a papier | |
CA2290154C (fr) | Chauffage par induction pour rouleaux thermiques | |
FI77491C (fi) | Torkcylinder foer en materialbanemaskins, speciellt en pappersmaskins, torkningsavdelning. | |
US6349637B1 (en) | Calender with magnetic device for adjusting the contact pressure between the rolls | |
FI58662B (fi) | Vals med magnetiskt kompenserad och/eller reglerad boejning | |
WO2001094868A1 (fr) | Sechoir continu avec aimants permanents a profil de temperature transversal reglable | |
WO1997045686A1 (fr) | Secheur en continu a aimants permanents | |
FI109713B (fi) | Menetelmä ja laite telan lämmittämiseksi | |
US5157233A (en) | Electromagnetic induction heater for heating a continuous thin sheet without undulation | |
FI109304B (fi) | Menetelmä ja laite telan lämmittämiseksi | |
JP4221227B2 (ja) | ゴデット | |
GB2058246A (en) | Rotatable body with magnetic device to counteract deflection | |
FI88419C (fi) | Bk-vals med uppvaermd mantel | |
CA2356432C (fr) | Chauffage par induction de surfaces de rouleaux de calandre | |
JPH08270641A (ja) | 加熱ローラ装置 | |
JP4570282B2 (ja) | ローラ装置 | |
JPS6427182A (en) | Roll device | |
JPS6427189A (en) | Roll device | |
JPS6427192A (en) | Roll device | |
JPS6427190A (en) | Roll device | |
JPH04241191A (ja) | 紙の乾燥装置 | |
JPH0368156B2 (fr) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
122 | Ep: pct application non-entry in european phase | ||
NENP | Non-entry into the national phase |
Ref country code: JP |