EP1544561A1 - Système pour sécher des matériaux - Google Patents

Système pour sécher des matériaux Download PDF

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Publication number
EP1544561A1
EP1544561A1 EP03104707A EP03104707A EP1544561A1 EP 1544561 A1 EP1544561 A1 EP 1544561A1 EP 03104707 A EP03104707 A EP 03104707A EP 03104707 A EP03104707 A EP 03104707A EP 1544561 A1 EP1544561 A1 EP 1544561A1
Authority
EP
European Patent Office
Prior art keywords
station
materials
drying
support
hydroextraction
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.)
Withdrawn
Application number
EP03104707A
Other languages
German (de)
English (en)
Inventor
Patrizio Grando
Alberto c/o Costr. Meccaniche L. Pozzi SPA Pozzi
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.)
Pozzi Leopoldo SRL
RF Systems SRL
Original Assignee
Pozzi Leopoldo SRL
RF Systems SRL
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 Pozzi Leopoldo SRL, RF Systems SRL filed Critical Pozzi Leopoldo SRL
Priority to EP03104707A priority Critical patent/EP1544561A1/fr
Publication of EP1544561A1 publication Critical patent/EP1544561A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/006—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles
    • F26B21/007—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles the objects being bobbin- or spool-like bodies
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
    • D06B15/10—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by use of centrifugal force
    • 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
    • F26B13/001—Drying and oxidising yarns, ribbons or the like
    • F26B13/003—Drying and oxidising yarns, ribbons or the like in the shape of spools, coils, bobbins or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/048—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum in combination with heat developed by electro-magnetic means, e.g. microwave energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B7/00—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00

Definitions

  • the present invention relates to a system for drying materials, particularly useful to dry textile fibres such as yarns.
  • drying cycles comprising a phase of mechanical hydroextraction of water by centrifugation, followed by a drying phase that can be carried out in hot air ovens or radiofrequency ovens.
  • a known method of drying yarns wound for instance as cones provides for a hydroextraction phase by centrifugation, removing most water contained in the yarn, followed by a drying phase in a radiofrequency drier completing the drying operation bringing the yarn to the desired humidity rate.
  • the main drawback of this drying method consists in that the devices carrying out the centrifugal hydroextraction and the radiofrequency driers have different material processing times.
  • the radiofrequency drying phase is much longer because it is not possible to reach too high radiance powers that could damage yarn.
  • the radiofrequency drier requires a great working surface to distribute the active power on a big quantity of material to be treated.
  • a first drawback consists in that, in addition to the considerable space requirement for the equipment and the intermediate storage, it is necessary to carry out repeated movements of the material from the area where the centrifugation devices are arranged to the area where the drying devices are mounted, that could be away even several metres from each other.
  • Another drawback consists in that the presence of intermediate storage of semifinished material involves also the cost of material immobilization.
  • a last, but not least, drawback consists in that one should take into account in the cycle-time also the time of unloading each centrifugation device and loading each drying device that, besides involving an increase of the crossing-time of the departments, causes also an increase of costs for the greater labour required or for the installation of automatic moving equipments.
  • the present invention aims at overcoming said drawbacks.
  • a first object of the invention is to provide a drying system carrying out the treatment of hydroextraction by centrifugation, in an automatic sequence with the radiofrequency drying treatment.
  • Another object is to provide a system allowing a greater output in comparison with equivalent systems of known type, the used space being equal.
  • a last, but not least, object is to improve the quality of the finished product in comparison with the treatments of the prior art.
  • a drying system for materials that according to the main claim is characterized by comprising:
  • the system comprises at least a loading station where the materials to be dried are placed in the material holder to be introduced into the hydroextraction device and at least an unloading station where the dried materials coming out from the drying station are unloaded from the material holder.
  • the drying operation with radiofrequency heating occurs preferably with a frequency comprised between 5 and 50 MHz and under vacuum so as to lower the processing temperature.
  • the system is used to dry yarns arranged in cones or tubes loaded on a material holder having such features to make easier the mechanical hydroextraction actions and allow during the radiofrequency drying phase, the generation of a dynamic vacuum condition through the material being treated.
  • the drying system of the invention allows to obtain a dried product in less time and of better quality relative to systems of the prior art.
  • the system of the invention is more economical relative to the systems of the prior art because it reduces the cycle-time and the handling operations of the materials between the devices and the loading and unloading stations as well as the floor room required by the equipments.
  • the material drying system of the invention is generally indicated with numeral 1 in Figures 1 to 3 where it is shown in three different views.
  • the system comprises:
  • the operation frequency of the drying station is comprised between 5 and 50 MHz.
  • the system comprises also a loading and unloading station generally indicated with numeral 10, from which the handling means 9 take the material holders 8 that should be placed at the hydroextraction station 2 and in which the same handling means 9 put down the material holders 8 taken at the drying station 5.
  • the operator O first unloads from the material holder 8 the materials M that already underwent the drying process at the station 5 and then loads on the same material holder 8 other materials M that should undergo the hydroextraction process at the hydroextraction station 2.
  • the drying station 5 comprises also suction means generally indicated with 11, that are connected with the drying device 6 and particularly with the material holder 8 to put it under vacuum during the material-drying treatment.
  • the loading and unloading stations instead of being coincident, may be separate from each other and divided into loading stations arranged upstream the hydroextraction devices and unloading stations arranged downstream the drying stations.
  • suction means 11 may be of any number, but not necessarily equal to the number of drying devices to be put under vacuum.
  • the hydroextraction device 3 comprises a container 12 that can be closed by a lid 12a, inside which centrifugation means generally indicated with 4 are arranged.
  • Discharge ducts convey the extracted water outside the device.
  • the centrifugation means comprise a basket 14 with perforated lateral surface 15, provided with a bottom 16 mechanically connected to driving means generally indicated with 17, adapted to put it into rotation around a vertical axis X defined by a central core 18 rising from said bottom 16.
  • the drying device 6 comprises a container 19 that can be closed through a lid 19a, inside which there are armatures generating an electric field, generally indicated with 20, electrically connected to a radiofrequency generator 21 jointly constituting the above-mentioned radiofrequency means generally indicated with 7.
  • More particularly said armatures 20 are made of conductive materials and comprise a central core 22 coaxially arranged inside the container 19 defining a vertical axis Y and one or more curved plates 23 arranged in proximity of the walls of the container 19 with the concavity 23a facing the central core 22.
  • the central core 22 is generally grounded while the curved plates 23 are electrically connected to the radiofrequency generator 21; in a different installation embodiment the curved plates could be grounded or be integral with the container 19, while the central core could be electrically connected to the radiofrequency generator.
  • rotation means generally indicated with 24, comprising a support plane 25 for the material holder 8, mechanically connected to driving means generally indicated with 26, adapted to put it into rotation around the vertical axis Y defined by the central core 22.
  • the central core 22 as shown in Figure 3, is internally hollow and is in communication through a duct 27 with the above-mentioned suction unit 11 consisting of a vacuum pump 11a.
  • each holder consists of a tubular body 28 with mainly longitudinal development, from which support arms, each generally indicated with numeral 29, for the materials M to be dried are projecting.
  • each support arm 29 shown in Figures 5, 5a comprises a first tubular member 30 peripherally fixed to the tubular body 28 and a second tubular member 31 telescopically and slidingly coupled to the first tubular member 30.
  • Said swinging support 32 comprises, as shown in the detailed views of Figures 5, 5a and 7, a perforated conical support 33 with a base 33a coupled in a conical seat 34 made in the second tubular member 31.
  • the base 33a is freely coupled inside the seat 34 so that the perforated support 33 may swing in both directions of the arrow indicated with 35 in order to orient the material M to be dried arranged on it during the centrifugation.
  • the perforated support 33 initially arranged vertically and retracted as shown in Figure 5a, during the centrifugation phase is moved in an inclined and projecting position as shown in Figure 5 and then returns again in the configuration shown in Figure 5a during the radiofrequency drying phase under the action exerted by suction on the second tubular member 31.
  • the material M to be treated consists of a cone formed by yarn wound on a perforated conical tube T coaxially coupled externally to the perforated conical support 33.
  • a constructional variation of the perforated support is provided, having a cylindrical surface as shown in Figure 5b, where it is generally indicated with numeral 33a, which is used when the yarn is wound on a cylindrical tube instead of a conical one.
  • the material holder should be made according to different geometrical configurations relative to those described and anyway adapted to receive the material in the most suitable way to allow suction through said material.
  • FIG. 1 to 3 are generally indicated with 9, one can see that they essentially comprise a vertical column 35 defining a vertical axis Z to which a moving arm 36 is associated, provided at the ends with a hooking means 37 of a corresponding material holder 8.
  • the driving means comprise:
  • rotation means of the material holder 8 generally indicated with 40 and practically equal to those provided in the drying device 6, comprising a support plane 41 rotated by driving means 42 around a vertical axis K defined by a central core 43 vertically rising from the support plane 41.
  • the material holder 8 When loading is completed, the material holder 8 is lifted vertically by the arm 36 that is moved upwards along the column 35 by the intervention of the translation means 39.
  • the arm 36 lifts at the same time also the material holders 8 inside the hydroextraction device 3 and the drying device 6, in which the previously loaded materials underwent the hydroextraction and drying treatments respectively.
  • lids 12a and 19a are respectively raised from the hydroextraction device 3 and the drying device 6, which are fixedly secured to the hooking means 37 of the material holders.
  • the arm 36 is then put into rotation by the rotation means 38 in the clockwise direction indicated by arrow 45 so that at the same time:
  • the materials M treated and placed at the unloading station are taken out from the corresponding material holder 8 which is then again loaded with fresh material to be treated. This cycle may be repeated indefinitely.
  • the loading and unloading time of the material holder by the operator corresponds to the centrifugation-time of the hydroextraction device 3 and the drying-time of the drying device 6.
  • the treatment temperature is lowered and this allows to increase the power that the radiofrequency generator delivers to the yarn that can therefore lose humidity in less time without damage.
  • the shaft 33 supporting the tube T of cone M can be arranged inclined by the amount allowed by the inclination á of the conical profile seat 34 receiving its end 33a.
  • the inclination á of the conical profile seat 34 is indeed equal to the inclination á of the outer wall of the cone M so that its outer surface during centrifugation is substantially vertical and therefore in contact with the wall 14 of the rotary basket 4 as shown in Figure 6.
  • the wall 14 of the basket 4 exerts a mechanical containment action of the cone during centrifugation and avoids to damage the yarn while the perforation 15 allows passage of water which is being extracted by centrifugation.
  • a perforated cylindrical support 33a will be used with an axis that cannot be inclined because during centrifugation the outer surface of the cone will be placed in contact with the inner surface of the basket 14 without requiring rotation of its axis.
  • the vacuum action generated by the suction means 11 causes the second tubular member 31 to retract gradually in the configuration shown in Figure 5a.
  • suction occurs according to the flow indicated in Figure 6 in the direction of the arrows 52 from inside the container 19 to the interior of the material holder 8 passing through the entire body of the yarn constituting each cone M.
  • the suction unit 11 does not create a static vacuum, but an active one because air and steam produced during the drying phase and extracted by the suction unit 11, are supplemented with air sucked from outside according to a continuous cycle allowing anyway to keep constantly under vacuum the drying device 6 during operation.
  • the driving means for the material holders could be carried out in a form other than the described and illustrated one.
  • the material holder may also undergo constructional modifications as a function of the material to be treated that has to be supported.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Microbiology (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Drying Of Solid Materials (AREA)
EP03104707A 2003-12-16 2003-12-16 Système pour sécher des matériaux Withdrawn EP1544561A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03104707A EP1544561A1 (fr) 2003-12-16 2003-12-16 Système pour sécher des matériaux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03104707A EP1544561A1 (fr) 2003-12-16 2003-12-16 Système pour sécher des matériaux

Publications (1)

Publication Number Publication Date
EP1544561A1 true EP1544561A1 (fr) 2005-06-22

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EP03104707A Withdrawn EP1544561A1 (fr) 2003-12-16 2003-12-16 Système pour sécher des matériaux

Country Status (1)

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EP (1) EP1544561A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105274756A (zh) * 2015-11-03 2016-01-27 嘉善龙翔人造毛绒有限公司 一种甩干设备
WO2016016862A1 (fr) 2014-08-01 2016-02-04 Montrade S.P.A. Appareil et procédé pour la production de filtres pour cigarettes ou autres articles à fumer
WO2022094822A1 (fr) * 2020-11-05 2022-05-12 徐州林源生物质燃料有限公司 Râtelier à mailles à structure en acier approprié pour l'aération de la paille
CN114812107A (zh) * 2022-04-19 2022-07-29 山东香果冻干机械科技有限公司 一种保持食品冻干中真空度恒定的设备及工艺方法

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU460343A1 (ru) * 1972-09-15 1975-02-15 Предприятие П/Я Г-4941 Поточна лини дл пропитки и сушки текстильных изделий
FR2299443A1 (fr) * 1974-10-11 1976-08-27 Mhm Electronic Dispositif de sechage et de traitement thermique de fils textiles par pertes dielectriques
US4304048A (en) * 1979-08-08 1981-12-08 Dawson International Limited Radio frequency drying of textile material
GB2121151A (en) * 1982-05-19 1983-12-14 Krantz H Gmbh & Co Drying wet-treated bobbins
US4464846A (en) * 1981-07-17 1984-08-14 Osaka Bobbin Kabushiki Kaisha Hydro-extracting apparatus for cheeses of yarn
US4545135A (en) * 1982-04-29 1985-10-08 Barriquand Installations for spin-drying fibrous or porous materials
GB2174974A (en) * 1985-05-08 1986-11-19 Krantz H Gmbh & Co Method and mechanism for loading and unloading centrifuge drums
FR2594451A1 (fr) * 1986-02-14 1987-08-21 Vantourout Victor Essorage et manutention automatique pour tops teinture
EP0299140A1 (fr) * 1987-07-11 1989-01-18 Osaka Bobbin Kabushiki Kaisha Procédé et appareil de centrifugation de fils
US4852270A (en) * 1986-12-04 1989-08-01 F.Lli Dettin S.P.A. Hydroextractor for yarns on a reel
FR2704633A1 (fr) * 1993-04-27 1994-11-04 Inst Textile De France Procédé et dispositif de séchage de bobines par air chaud et haute frééquence.
FR2739999A1 (fr) * 1995-10-17 1997-04-18 Inst Textile De France Porte-matiere permettant d'appliquer un champ electromagnetique haute-frequence sur un empilement de matieres, et enceinte de traitement, notamment sechoir rapide textile haute-frequence equipe d'un tel porte matiere
US6405568B1 (en) * 1997-09-26 2002-06-18 Loris Bellini S.P.A. Plant for processing yarn on reels
WO2002095114A1 (fr) * 2001-05-25 2002-11-28 Master S.A.S. Di Ronchi Francesco & C. Appareil de teinture et de blanchiment de fil enroule sur des bobines ou conditionnements analogues

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU460343A1 (ru) * 1972-09-15 1975-02-15 Предприятие П/Я Г-4941 Поточна лини дл пропитки и сушки текстильных изделий
FR2299443A1 (fr) * 1974-10-11 1976-08-27 Mhm Electronic Dispositif de sechage et de traitement thermique de fils textiles par pertes dielectriques
US4304048A (en) * 1979-08-08 1981-12-08 Dawson International Limited Radio frequency drying of textile material
US4464846A (en) * 1981-07-17 1984-08-14 Osaka Bobbin Kabushiki Kaisha Hydro-extracting apparatus for cheeses of yarn
US4545135A (en) * 1982-04-29 1985-10-08 Barriquand Installations for spin-drying fibrous or porous materials
GB2121151A (en) * 1982-05-19 1983-12-14 Krantz H Gmbh & Co Drying wet-treated bobbins
GB2174974A (en) * 1985-05-08 1986-11-19 Krantz H Gmbh & Co Method and mechanism for loading and unloading centrifuge drums
FR2594451A1 (fr) * 1986-02-14 1987-08-21 Vantourout Victor Essorage et manutention automatique pour tops teinture
US4852270A (en) * 1986-12-04 1989-08-01 F.Lli Dettin S.P.A. Hydroextractor for yarns on a reel
EP0299140A1 (fr) * 1987-07-11 1989-01-18 Osaka Bobbin Kabushiki Kaisha Procédé et appareil de centrifugation de fils
FR2704633A1 (fr) * 1993-04-27 1994-11-04 Inst Textile De France Procédé et dispositif de séchage de bobines par air chaud et haute frééquence.
FR2739999A1 (fr) * 1995-10-17 1997-04-18 Inst Textile De France Porte-matiere permettant d'appliquer un champ electromagnetique haute-frequence sur un empilement de matieres, et enceinte de traitement, notamment sechoir rapide textile haute-frequence equipe d'un tel porte matiere
US6405568B1 (en) * 1997-09-26 2002-06-18 Loris Bellini S.P.A. Plant for processing yarn on reels
WO2002095114A1 (fr) * 2001-05-25 2002-11-28 Master S.A.S. Di Ronchi Francesco & C. Appareil de teinture et de blanchiment de fil enroule sur des bobines ou conditionnements analogues

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SCHOLL S ET AL: "IMPROVING PROCESS QUALITY IN DYED YARN PACKAGES", AMERICAN DYESTUFF REPORTER, SAF INTERNATIONAL PUBLICATIONS, SECAUSUS, US, vol. 86, no. 9, 1 September 1997 (1997-09-01), pages 63 - 65, XP000722353, ISSN: 0002-8266 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016016862A1 (fr) 2014-08-01 2016-02-04 Montrade S.P.A. Appareil et procédé pour la production de filtres pour cigarettes ou autres articles à fumer
CN105274756A (zh) * 2015-11-03 2016-01-27 嘉善龙翔人造毛绒有限公司 一种甩干设备
CN105274756B (zh) * 2015-11-03 2017-10-24 嘉善龙翔人造毛绒有限公司 一种甩干设备
WO2022094822A1 (fr) * 2020-11-05 2022-05-12 徐州林源生物质燃料有限公司 Râtelier à mailles à structure en acier approprié pour l'aération de la paille
CN114812107A (zh) * 2022-04-19 2022-07-29 山东香果冻干机械科技有限公司 一种保持食品冻干中真空度恒定的设备及工艺方法

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