EP3004768A1 - Method and device for air treatments of fabrics - Google Patents
Method and device for air treatments of fabricsInfo
- Publication number
- EP3004768A1 EP3004768A1 EP14747413.4A EP14747413A EP3004768A1 EP 3004768 A1 EP3004768 A1 EP 3004768A1 EP 14747413 A EP14747413 A EP 14747413A EP 3004768 A1 EP3004768 A1 EP 3004768A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fabric
- ducts
- air
- airtight chamber
- duct
- 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.)
- Granted
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
- F26B13/10—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.
- 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 with a narrow, elongate cross section into which air is blown at a pressure and volume flow rate such as to carry the fabric in one direction and then in the other direction, alternately.
- the feed duct is provided with openings which are directed 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.
- This type of operation is usually performed by 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.
- FIGS. 1-3 schematically illustrate a preferred embodiment of a device according to the invention for treating fabrics with air;
- FIG. 4 shows a partial schematic view of a first variant embodiment of the device
- FIG. 5 schematically illustrates a second variant embodiment of the device
- a device 1 for treating a fabric T with air comprises: - an airtight chamber 10 provided with at least one opening 12 (12a, 12b) for the supply of forced air;
- ducts 14,16 for the treatment of the fabric, said ducts being at least partially located inside the airtight chamber and at least partially outside it so that each of them has one respective mouth 14a, 16a in communication with the exterior of the airtight chamber for the infeed/outfeed of the fabric T; - fabric transferring means 22 located between the mouths 14b, 16b of the ducts 14, 16 inside the airtight chamber 10.
- 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. It has been found that the combination of the strong heat exchange with the continuous renewal of the air layer which is in contact with the fabric and which, owing to the high speed, penetrates the fabric in depth, produces an extraordinarily good drying, heating or cooling effect. At the same time, the creation inside the two treatment ducts of laminar air flows with streamlines substantially parallel to the fabric feed direction produces a marked stretching and centring effect on 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.
- a device according to the invention may be advantageously used as: - a stand-alone machine for the continuous or discontinuous drying of woven, knitted or non-woven fabrics, in open-width or rope form;
- - a single or multiple drying module of a continuous or discontinuous machine for the treatment of knitted fabrics, in open-width or rope form, with dimensional restorability effect (comprising, for example, single or multiple vibrating tanks/platforms); - a cooling section downstream of a dryer, a stenter or a continuous tumbler;
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000005A ITPO20130005A1 (en) | 2013-06-07 | 2013-06-07 | DEVICE FOR DRYING AND FINISHING OF FABRICS WITH AIR |
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 true EP3004768A1 (en) | 2016-04-13 |
EP3004768B1 EP3004768B1 (en) | 2017-11-15 |
Family
ID=49000564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14747413.4A Active EP3004768B1 (en) | 2013-06-07 | 2014-06-09 | Method and device for air treatments of fabrics |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP3004768B1 (en) |
CN (1) | CN105378414B (en) |
BR (1) | BR112015030593B1 (en) |
ES (1) | ES2658080T3 (en) |
IT (1) | ITPO20130005A1 (en) |
RU (1) | RU2016100307A (en) |
WO (1) | WO2014195926A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201700034911A1 (en) * | 2017-03-30 | 2018-09-30 | Coramtex Srl | MACHINE AND DRYING METHOD AND RETURN FABRIC TREATMENT |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3231985A (en) * | 1962-01-15 | 1966-02-01 | Hupp Corp | Heating, drying and curing apparatus and methods |
FR1330283A (en) * | 1962-05-10 | 1963-06-21 | Holweg Const Mec | Method and device for continuous drying of strip materials |
FR1387065A (en) * | 1963-10-07 | 1965-01-29 | Hupp Corp | Improvement in heat treatments of a sheet material |
DE1299667B (en) * | 1965-01-20 | 1969-07-24 | Trockentechnik Kurt Brueckner | Device for the thermal treatment of a moving flat web of material |
GB1362759A (en) | 1971-05-28 | 1974-08-07 | Brueckner Apparatebau Gmbh | Apparatus for textile treatment |
ES413182A3 (en) | 1973-03-30 | 1976-02-01 | Alea Soc Per Azioni Lombarda E | A drying device for tubular mesh tissue. (Machine-translation by Google Translate, not legally binding) |
DE2540851C3 (en) * | 1975-09-13 | 1978-08-10 | Hoechst Ag, 6000 Frankfurt | Process and additional device for cylinder drying machines for uniform drying of textile materials |
ES532408A0 (en) | 1984-05-11 | 1985-04-01 | Vinas Jaime Anglada | METHOD FOR THE DRY TREATMENT OF A TISSUE AND APPARATUS FOR ITS REALIZATION |
DE4228454C2 (en) | 1992-08-26 | 1999-01-14 | Monforts Gmbh & Co A | Device for blowing a textile web |
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 (en) | 1998-01-30 | 1999-08-05 | Brueckner Trockentechnik Gmbh | Device for the heat treatment of a textile web |
DE19955147C2 (en) * | 1999-11-17 | 2002-02-28 | Babcock Bsh Gmbh | Roller Dryer |
CN2745010Y (en) * | 2004-09-16 | 2005-12-07 | 无锡亚玛登干燥设备有限公司 | Bobbin package yarn drying machine |
CN101251333B (en) * | 2008-04-03 | 2010-06-09 | 青岛环球集团股份有限公司 | Alternation drum-type drying case |
CN202145077U (en) * | 2011-06-07 | 2012-02-15 | 东莞市科锐机电设备有限公司 | Coil stock vacuum drier |
DE102012221380A1 (en) * | 2012-11-22 | 2014-05-22 | TRüTZSCHLER GMBH & CO. KG | Apparatus and method for treating a preferably web-shaped Guts with a gaseous treatment medium |
-
2013
- 2013-06-07 IT IT000005A patent/ITPO20130005A1/en unknown
-
2014
- 2014-06-09 BR BR112015030593-8A patent/BR112015030593B1/en active IP Right Grant
- 2014-06-09 ES ES14747413.4T patent/ES2658080T3/en active Active
- 2014-06-09 CN CN201480032584.9A patent/CN105378414B/en active Active
- 2014-06-09 EP EP14747413.4A patent/EP3004768B1/en active Active
- 2014-06-09 WO PCT/IB2014/062081 patent/WO2014195926A1/en active Application Filing
- 2014-06-09 RU RU2016100307A patent/RU2016100307A/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2014195926A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201700034911A1 (en) * | 2017-03-30 | 2018-09-30 | Coramtex Srl | MACHINE AND DRYING METHOD AND RETURN FABRIC TREATMENT |
WO2018178838A1 (en) * | 2017-03-30 | 2018-10-04 | Coramtex S.R.L. | Machine and method for the drying and treatment of fabric |
Also Published As
Publication number | Publication date |
---|---|
ES2658080T3 (en) | 2018-03-08 |
BR112015030593B1 (en) | 2021-09-28 |
RU2016100307A3 (en) | 2018-05-10 |
CN105378414A (en) | 2016-03-02 |
BR112015030593A2 (en) | 2017-07-25 |
RU2016100307A (en) | 2017-07-13 |
EP3004768B1 (en) | 2017-11-15 |
ITPO20130005A1 (en) | 2014-12-08 |
WO2014195926A1 (en) | 2014-12-11 |
CN105378414B (en) | 2017-09-26 |
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