EP3004768B1 - Verfahren und vorrichtung zur luftbehandlung von geweben - Google Patents

Verfahren und vorrichtung zur luftbehandlung von geweben Download PDF

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Publication number
EP3004768B1
EP3004768B1 EP14747413.4A EP14747413A EP3004768B1 EP 3004768 B1 EP3004768 B1 EP 3004768B1 EP 14747413 A EP14747413 A EP 14747413A EP 3004768 B1 EP3004768 B1 EP 3004768B1
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EP
European Patent Office
Prior art keywords
fabric
ducts
air
duct
airtight chamber
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Application number
EP14747413.4A
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English (en)
French (fr)
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EP3004768A1 (de
Inventor
Massimo Biancalani
Riccardo Ravagli
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Biancalani SRL
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Biancalani SRL
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Publication of EP3004768A1 publication Critical patent/EP3004768A1/de
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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
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C19/00—Breaking or softening of fabrics
    • 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
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes

Definitions

  • This invention relates to a method and a device for the treatment of fabrics, and in particular, for drying and finishing the fabrics, with hot or cold air.
  • Fabrics be they woven, knitted, or non-woven (felts and the like) are frequently treated using machinery in which the fabric is subjected to a heat treatment with hot air in order to dry it and/or thermally fix the constituent fibres, or to a treatment with cold air in order to cool it after a heat treatment.
  • machines designed for continuous treatment with hot air basically comprise a horizontal tunnel which the fabric is made to travel through so that it meets air heated in various ways and brought into contact therewith.
  • the fabric is fed by means of conveyor belts, as for example in free dryers, or by means of gripper or pin chains, as for example in stenters.
  • Documents DE-4228454 and EP-0933607 describe air systems used typically in stenters, whereas documents US-3812599 and CA-2323723 describe similar air systems used in dryers in which the fabric is fed by conveyor belts.
  • Document ES-413182 describes the air system of a free dryer where the fabric feed means are outside the treatment tunnel.
  • US4124941A discloses a cylinder drying machine having an airtight chamber provided with nozzles which blow or suction air across the width of the textile web. Guide rollers are provided for transferring the web between two openings of the chamber.
  • the treatment tunnel is provided with hot air supply points alternated with extraction points, which means that the hot air is projected in a direction substantially at right angles to the fabric, remains in contact therewith for a very brief stretch and is immediately moved away by the suction system which recirculates it and/or expels it to the outside.
  • the fabric is fed by means of pneumatic systems.
  • the fabric is moved in both directions inside a duct in substantially opposite directions in order to reverse the motion of the fabric.
  • GB-2158472 which describes an apparatus substantially comprising two non-airtight chambers for accumulating the fabric and feeding it in/out.
  • the chambers are located at the ends of a duct having the shape of an upturned U, into which the air is supplied through slots located along the vertical stretches of the duct.
  • the fabric is reciprocated through the duct exclusively by the air supplied into the duct and the air thus always flows in the direction in which the fabric moves.
  • the air fed in also causes cooler air to be sucked in from the chamber upstream.
  • the length of the treatment duct is limited by the need to be able to feed the fabric from one end to the other without obstructions.
  • Fabric treatment with cold air is, generally speaking, carried out using devices similar to those used with hot air. Tunnels which blow cold air onto the surface of the fabric are normally preset at the final stage of stenters and, often, of the free dryers mentioned above.
  • the textile machines which treat the fabric in open-width form need to stretch and centre the fabric at the points where the fabric is fed into and out of the machine and, in some cases, also at intermediate points in the machine.
  • Mechanical means which always operate directly in contact with the fabric and always with the fabric positioned vertically.
  • Mechanical means of this kind are, for example: rollers with left- and right-hand projecting helical blades for stretching and pivot rollers for centring.
  • the main aim of this invention is to provide a method and a device for the treatment of fabrics with hot or cold air, and which allow obtaining high performance levels in terms of efficacy of treatment and, in particular, in terms of drying or cooling.
  • a further aim of the invention is to provide a method and device for treating fabric with air and which cause the fabric to be stretched and centred without using mechanical means acting on the surface of the fabric.
  • a device 1 for treating a fabric T with air comprises:
  • the method for the treatment of a fabric T implemented by this invention comprises the following steps:
  • the fabric may travel along the two ducts continuously in the direction opposite to that shown in Figure 1 (that is, it may be fed into the other duct 14 through the opening 14a outside the airtight chamber, be made to travel along the duct 14 in the direction opposite to that of the air flow, be fed out through the opening 14b thereof located inside the airtight chamber, be transferred by the roller 12 to the mouth 16b of the duct 16, be made to travel along that duct in the same direction as the air flow and be fed to the outside through the mouth 16a) or - as in the example described below - alternately in both directions.
  • the air used for treatment coming for example from a fan 24 equipped with a heat exchanger 26, is made to flow into the airtight chamber 10 through the opening 12 and, since there are no other ways out, is forced into both of the ducts 14,16 through which the fabric T passes, and reaches the mouths 14a, 16a located outside the airtight chamber.
  • the two ducts 14,16 are rectilinear, substantially vertically oriented, mutually parallel and protruding from the bottom of the airtight chamber 10.
  • one or preferably at least two lateral openings (12a,12b; see Figures 2-3 ) are provided.
  • the air is supplied into the airtight chamber 10 through at least one bottom opening 12c.
  • a cover or door may be provided to give access to the airtight chamber for the purposes of inspection and drawing-in of the fabric.
  • the cross sections of the ducts are such as to allow the fabric to move through the ducts easily while at the same time letting a quantity of air sufficient for treatment to also flow through parallel to the fabric itself.
  • the ducts 14,16 have a transversal cross section which is preferably rectangular with long sides much longer (at least ten times longer) than the short sides, whereas when they are intended for a fabric in rope form, the ducts are preferably square or circular in cross section.
  • the ducts must be long enough to allow the air to act on a sufficiently large surface of the fabric.
  • the length of the ducts is advantageously greater than half the size of the long side of the cross section.
  • the ducts are advantageously at least five times as long as the diameter of the circle which circumscribes their transversal cross section.
  • the ducts may differ in size so that the one downstream is longer and/or different in cross section from the one upstream, thus providing a resultant force for moving the fabric which assists or substitutes the force applied by the transfer roller between the two ducts in the pair.
  • the air flows generated travel through the treatment ducts simultaneously, one in a direction which is the same as the fabric feed direction and the other in a direction which is opposite to the feed direction, and at speeds - determined substantially by the reduced cross section size of the ducts - which are high enough to produce an intense heat exchange with the fabric.
  • Figures 5 and 9 show a variant embodiment of the device, where a plurality of pairs of ducts 140,150 160,170 lead into a single airtight collector enclosure 100 and a suitable plurality of rollers 160 perform all the necessary fabric transfers, thus multiplying the fabric drying or cooling capacity.
  • the ducts are preferably oriented vertically and parallel to each other but, where necessary, they may also be divergent and/or have non-uniform cross sections. Also, they may be partly inside and partly outside the airtight enclosure 100, or they may be completely inside or completely outside the enclosure.
  • the system used in a device according to the invention differs substantially from those used in prior art drying tunnels, where the fabric comes into contact with the air for an extremely limited time and at a very limited speed because the continuous alternation of air inlet and outlet points along the tunnel allow the air to come into contact with the fabric for a very short length.
  • the invention also differs from the system used in prior art continuous tumblers because in the prior art, the air basically has a fabric transporting and impacting function, which makes it necessary to adopt aerodynamic solutions which cause the air to flow in the treatment duct in one direction and then in the other alternately and at very high supply pressures.
  • the hot air in the treatment duct flows at a high speed in the same direction as the direction the fabric is moving in at the same moment which, as mentioned above, causes very cold air to be also sucked in, thus considerably lowering the average temperature inside the duct.
  • the quantity of air sucked in together with the fabric is quantitatively of the same order of magnitude as the hot air supplied by the process fan but at a temperature and humidity close, if not equal, to those of the extracted air channelled to the exhaust flue.
  • the air starting from the collector enclosure, flows in one duct in the same direction as the fabric and, in the other duct, in the opposite direction to the fabric, without sucking more air in from the place where the fabric is fed in and fed out, but simply flowing totally therein. That means the air pressure and volume flow rate requirements are much more limited and, consequently, the power of the process fans are accordingly reduced.
  • the fabric treatment ducts being vertical, facilitate the passage of the fabric through them and avoid the obstructions which easily occur in horizontal ducts and, consequently, their cross sections can be much more reduced in size. Consequently, under equal conditions of speed of the air in contact with the fabric, the volume flow rate required of the fan is also reduced, which in turn means a lower electrical and thermal power requirement.
  • the device of the invention is typically extremely compact and considerably smaller in size than hot air textile dryers of any kind.
  • a device with four ducts is just a few decimetres longer, whereas an equivalent traditional drying tunnel would be no less than twelve metres in length.
  • this device can easily be used to construct a continuous or discontinuous machine which may be either a stand-alone machine or an in-line part of an existing machine.
  • Figure 6 shows a device according to the invention with two treatment ducts, used to move the fabric rapidly and alternately from one to the other of two piles while the fabric is fed in and withdrawn at a slower production speed.
  • Figure 7 shows the application of the device to an in-line machine with infeed pile.
  • the machine following it may be a textile dryer or any kind, and more specifically, a continuous tumbler, a free dryer or a stenter.
  • Figure 8 shows a discontinuous machine equipped with a device according to the invention and with a vibrating tank with two sections 28a,28b on top of one another for drying to obtain dimensional restorability and stability of a knitted fabric.
  • Figure 9 shows a drying machine equipped with a device having two pairs of ducts 140,150 160,170 for the treatment of the fabric.
  • the hot air from the fan 24 is supplied into the airtight chamber 100 and into the ducts and flows out into a containment chamber 30 from which it is extracted by an exhaust fan 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Materials For Medical Uses (AREA)

Claims (10)

  1. Vorrichtung zur Luftbehandlung eines Stoffes (T), umfassend:
    - eine luftdichte Kammer (10), die mit mindestens einer Öffnung (12; 12a, 12b; 12c) für die Druckluftzwangszufuhr versehen ist, und
    - Überführungsmittel (22) des Stoffs, die sich im Inneren der luftdichten Kammer (10) befindet,
    dadurch gekennzeichnet, dass sie mindestens zwei Kanäle (14, 16; 140, 150, 160, 170) für die Behandlung des Stoffes umfasst, wobei sich die Kanäle mindestens teilweise im Inneren der luftdichten Kammer und mindestens teilweise außerhalb derselben befinden, sodass jeder von ihnen eine entsprechende Mündung (14a, 16a) in Verbindung mit der Außenseite der luftdichten Kammer zum Einschleusen und/oder Ausschleusen des Stoffes (T) und für das Ausströmen der Luft hat;
    wobei sich das Stoffüberführungsmittel (22) zwischen den Mündungen (14b, 16b) der Kanäle (14, 16) befindet, die sich im Inneren der Kammer (10) befinden.
  2. Vorrichtung nach Anspruch 1, wobei die mindestens zwei Kanäle (14, 16; 140, 150, 160, 170) geradlinig, im Wesentlichen vertikal ausgerichtet, wechselseitig parallel sind und vom Boden der luftdichten Kammer (10) abstehen.
  3. Vorrichtung nach Anspruch 1 oder 2, wobei die mindestens eine Öffnung (12c) für die Druckluftzwangszufuhr im Boden der Kammer (10) ausgebildet ist.
  4. Vorrichtung nach einem der vorstehenden Ansprüche, wobei der transversale Querschnitt der Kanäle (14, 16; 140, 150, 160, 170) rechteckig ist, wobei eine Seite mindestens zehnmal so lang wie die andere ist.
  5. Vorrichtung nach Anspruch 4, wobei die Länge der Kanäle (14, 16; 140, 150, 160, 170) größer als die Hälfte der größten Dimension des transversalen Querschnitts ist.
  6. Vorrichtung nach einem der Ansprüche 1 bis 3, wobei die Kanäle (14, 16; 140, 150, 160, 170) einen kreisförmigen oder quadratischen Abschnitt aufweisen.
  7. Vorrichtung nach Anspruch 6, wobei die Kanäle (14, 16; 140, 150, 160, 170) mindestens fünfmal so lang wie der Durchmesser des Umfangs sind, der ihren transversalen Querschnitt umschreibt.
  8. Vorrichtung nach einem der vorangehenden Ansprüche, wobei der Querschnitt und/oder die Länge der Kanäle mit dem Vorschieben des Stoffs variabel ist und/oder die Kanäle sich zur Gänze im Inneren oder zur Gänze außerhalb der luftdichten Kammer erstrecken.
  9. Verfahren zur Luftbehandlung eines Stoffes (T), umfassend die Schritte:
    - Druckluftzwangszufuhr in eine luftdichte Kammer (10) und Ausströmen der Luft aus der Kammer,
    - Ein- und Ausschleusen des Stoffes in die bzw. aus der luftdichten Kammer (10),
    dadurch gekennzeichnet, dass
    - die Zwangszufuhr und das Ausströmen der Luft durch mindestens zwei Kanäle (14, 16) erfolgen, die von der Kammer abstehen,
    - der Stoff in die Mündung (14a; 16a) eines ersten Kanals (14; 16) eingeschleust wird,
    und dass es ferner die Schritte umfasst:
    - Bewegen des Stoffs im Inneren des ersten Kanals (14; 16) in die Richtung, die der Richtung des Luftstroms entlang desselben Kanals (14; 16) entgegengesetzt ist;
    - Ausschleusen des Stoffs aus der Kanalmündung (14b; 16b), die sich im Inneren der luftdichten Kammer befindet,
    - Überführen des Stoffs mittels einer Walze (22), entweder im Leerlauf oder motorisiert, zur Mündung (16b; 14b) eines zweiten Kanals (16; 14),
    - Bewegen des Stoffs im Inneren des zweiten Kanals (16; 14) in derselben Richtung, in der die Luft in diesem Kanal (16; 14) strömt,
    - Ausschleusen des Stoffes aus der Mündung (16a; 14a) des zweiten Kanals (16; 14), der sich außerhalb der luftdichten Kammer befindet.
  10. Verfahren nach Anspruch 9, wobei der Stoff (T) entlang jedes Kanals (14, 16) abwechselnd in beide Richtungen läuft.
EP14747413.4A 2013-06-07 2014-06-09 Verfahren und vorrichtung zur luftbehandlung von geweben Active EP3004768B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000005A ITPO20130005A1 (it) 2013-06-07 2013-06-07 Dispositivo per trattamenti di asciugatura e finissaggio di tessuti con aria
PCT/IB2014/062081 WO2014195926A1 (en) 2013-06-07 2014-06-09 Method and device for air treatments of fabrics

Publications (2)

Publication Number Publication Date
EP3004768A1 EP3004768A1 (de) 2016-04-13
EP3004768B1 true EP3004768B1 (de) 2017-11-15

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Application Number Title Priority Date Filing Date
EP14747413.4A Active EP3004768B1 (de) 2013-06-07 2014-06-09 Verfahren und vorrichtung zur luftbehandlung von geweben

Country Status (7)

Country Link
EP (1) EP3004768B1 (de)
CN (1) CN105378414B (de)
BR (1) BR112015030593B1 (de)
ES (1) ES2658080T3 (de)
IT (1) ITPO20130005A1 (de)
RU (1) RU2016100307A (de)
WO (1) WO2014195926A1 (de)

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
IT201700034911A1 (it) * 2017-03-30 2018-09-30 Coramtex Srl Macchina e metodo di asciugatura e trattamento di rientro di tessuto

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FR1387065A (fr) * 1963-10-07 1965-01-29 Hupp Corp Perfectionnement aux traitements thermiques d'une matière en feuille
DE1299667B (de) * 1965-01-20 1969-07-24 Trockentechnik Kurt Brueckner Einrichtung zur thermischen Behandlung einer bewegten flaechenfoermigen Warenbahn
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ES413182A3 (es) 1973-03-30 1976-02-01 Alea Soc Per Azioni Lombarda E Un dispositivo secador para tejido tubular de malla.
DE2540851C3 (de) * 1975-09-13 1978-08-10 Hoechst Ag, 6000 Frankfurt Verfahren und Zusatzvorrichtung für Zylindertrockenmaschinen zum gleichmäßigen Trocknen von Textilmaterialien
ES8503828A1 (es) 1984-05-11 1985-04-01 Vinas Jaime Anglada Metodo para el tratamiento en seco de un tejido y aparato correspondiente para su realizacion
DE4228454C2 (de) 1992-08-26 1999-01-14 Monforts Gmbh & Co A Vorrichtung zum Beblasen einer textilen Warenbahn
US6173507B1 (en) 1997-03-06 2001-01-16 Frank Catallo Arrangement and operation of improved dryer between shrinkage compactors to control residual shrinkage of wet knitted web to below that produced by tumble drying
DE19803676A1 (de) 1998-01-30 1999-08-05 Brueckner Trockentechnik Gmbh Vorrichtung zur Wärmebehandlung einer textilen Warenbahn
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CN202145077U (zh) * 2011-06-07 2012-02-15 东莞市科锐机电设备有限公司 卷料真空干燥机
DE102012221380A1 (de) * 2012-11-22 2014-05-22 TRüTZSCHLER GMBH & CO. KG Vorrichtung und Verfahren zum Behandeln eines vorzugsweise bahnförmigen Guts mit einem gasförmigen Behandlungsmedium

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Also Published As

Publication number Publication date
CN105378414A (zh) 2016-03-02
BR112015030593B1 (pt) 2021-09-28
RU2016100307A (ru) 2017-07-13
WO2014195926A1 (en) 2014-12-11
BR112015030593A2 (pt) 2017-07-25
CN105378414B (zh) 2017-09-26
ITPO20130005A1 (it) 2014-12-08
RU2016100307A3 (de) 2018-05-10
EP3004768A1 (de) 2016-04-13
ES2658080T3 (es) 2018-03-08

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