EP2286013A1 - Machine for the processing of open - width fabrics and related method - Google Patents
Machine for the processing of open - width fabrics and related methodInfo
- Publication number
- EP2286013A1 EP2286013A1 EP09750287A EP09750287A EP2286013A1 EP 2286013 A1 EP2286013 A1 EP 2286013A1 EP 09750287 A EP09750287 A EP 09750287A EP 09750287 A EP09750287 A EP 09750287A EP 2286013 A1 EP2286013 A1 EP 2286013A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fabric
- feed
- machine
- air
- path
- 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
-
- 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
- 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
- F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
- F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
-
- 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
- D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
- D06B3/28—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics propelled by, or with the aid of, jets of the treating material
Definitions
- the present invention relates to a machine for processing open - width fabrics, preferably, but not exclusively, of the continuous type. More in particular, the present invention relates to a finishing machine for performing one or more of drying, tumblering, softening treatments or the like.
- a finishing machine for performing one or more of drying, tumblering, softening treatments or the like.
- State of the Art To modify the hand, i.e. the tactile characteristics of a fabric, a woven fabric or a knitted fabric, machines of various type have been designed and produced.
- a first category of machines provides for a rotating basket, within which is arranged the fabric, which is treated by making the basket to rotate. These machines can operate in a continuous manner, and in this case the fabric crosses the rotating basket, entering from an end thereof and going out from the o- ther end. Continuous machines of this type are described for example in WO-A- 03004751 and WO-A-03004756.
- the machines operate in a discontinuous manner, and therefore they process piece goods closed in a loop by joining together the head and the tail of the piece good.
- WO-A-2005/066407 describes an example of discontinuous machine.
- These machines can treat fabrics in a bath, or they can treat the dry fabric, or they can perform drying starting from a wet fabric and obtaining a dry fabric.
- these discontinuous machines reduce the problem of the formation of the knots and folds, but they obtain a hand of lesser quality, require again a device for opening the fabric in rope at the end of processing and present problems in traction of the fabric and consequently lengthening of the fabric due to the strong stresses to which the fabric is subjected during raising from the tank below the pneumatic duct for transferring and impacting.
- the duration of the treatment is limited or in any case it depends upon the number of impacts that the fabric can tolerate or must be subjected to, in order to achieve the required textile hand characteristics. Beyond this limit the working cannot continue without damaging the fabric or in any case without altering the final characteristics thereof; therefore, in many cases these machines do not allow to dry the fabric completely.
- an object of the present invention is to provide a machine which allows to overcome entirely or in part one or more of the drawbacks of the known machines.
- the object of a preferred embodiment of the present invention is to provide a machine for finishing fabric in weft, in warp, or knitted in width form, and preferably in a continuous process, which allows to obtain an optimum effect of softening of the fabric, together with the maximum shrinkage thereof.
- the object of another embodiment of the present invention is to provide a machine, which is able to perform processing of a wet fabric and if necessary adequately impregnated with a chemical product, which allows to obtain a high - A - drying capability of the fabric together with the effect of softening and shrinkage.
- the present invention provides for a machine for processing fabrics in width form, comprising: a transport system for transporting the fabric; at least one impact structure arranged in front of an end of the transport system for transporting the fabric; an accumulation area associated with said impact structure.
- flowing members are arranged, in order to generate a support air flow from the bottom towards said fabric, so as to support the fabric during the movement along said trans- port system.
- This air flow helps in lowering the tension in the fabric, by making it to "float" in the transport system, and facilitates drying.
- By controlling the flow rate of support air it is possible to accelerate or to slow the drying, making it at least partially independent of the mechanical working. In other words, it is possible to obtain a more or less quick drying of the fabric by setting a parameter which can vary relative to the impacting mode of the fabric.
- the machine can be a machine of the discontinuous type.
- the machine is of the continuous type, with a gradual insertion of fabric at one end and gradual extraction of fabric from the opposite end of the machine.
- the stock of fabric contained in the machine is subjected to the finishing working or to any other working required, moving back and forth in opposite directions through the machine with a speed greater than the speed of feed into the machine and extraction from the machine. In this way each section of fabric is subjected to a multiple impact and drying treatment, moving towards and backwards for a certain number of times within the machine.
- the conformation of the machine can be substantially symmetrical, with a reversible transport system in front of which two impact structures and two accumulation areas are arranged.
- the transport sys- tern is a pneumatic system, wherein the fabric is transferred by means of a high pressure-air flow.
- the transport system comprises in this case a duct, whose cross section is elongated in the direction orthogonal to the direction of feed of the fabric, in order to allow the treatment in open width. It is also possible to perform treatments in partially rope conditions, i.e. with the fabric not fully gath- ered in the transverse direction. This is obtained by dimensioning the transport duct with a width lesser than the width of the fabric.
- the cross section of the transport duct can be varied so as both to be adapted to variable widths of the fabric and to treat the fabric not fully gathered in open width.
- the blowing system is arranged preferably at the lower wall of the duct.
- the present invention also relates to a method for treating a fabric in o- pen width form, through feed in a transport system and impact against an impact structure.
- the method according to the present invention provides for an additional air flow which supports the fabric from the bottom to the top. This air flow can be combined with a flow of air for the transport, i.e. for causing the movement of the fabric along a pneumatic transport duct.
- the air flow is used to support the fabric from the bottom to the top, for example to perform a drying of the fabric which can be controlled independently of the mechanical working thereof. If independent air flows are used, one for transporting the fabric and the other for supporting and drying, it is possible to modify the drying times independently of the mechanical processing, thus obtaining more efficient processing and end results of higher quality.
- the method according to the present invention allows, by supporting the fabric by means of an air flow from the bottom, to re-lose the traction on the fabric during the transport thereof, thus reducing the drawbacks which, in the known machines, result from the fact that the pneumatically transported fabric is subjected to traction and therefore to elongation.
- the present invention relates to a ma- chine for processing fabrics in open width, comprising a transport system defining a path of feed of the fabric and comprising members for moving the fabric along the path, as well as an impact structure arranged in front of at least one of the ends and preferably in front of both the ends of the transport system, with accumulation areas of the fabric associated to the impact structure or structures.
- the transport system comprises - below the path of feed and preferably also above the path of feed - a series of members which generate air jets along the longitudinal development of the transport system, and these air jets are inclined so as to generate a thrust for supporting the fabric and a thrust for feeding the fabric along the path.
- blowing nozzles in the central area of the transport system intended only to generate the thrust for feeding the fabric and blowing apertures generating currents of air with a substantially vertical development having only the function of supporting the fabric
- the two functions are combined and performed by the blowing members.
- the blowing members are arranged along a substantial part of the longitudinal development of the path of feed.
- the blowing members can be designed, arranged and controlled so as to cause an inversion in the direction of feed of the fabric along its path. This can be obtained for example by arranging blowing members fixed and oriented in opposite manner, with an alternate arrangement. A system of valves, gates or other control elements feed alternatively the ones or the others of the blowing members with different inclination, so as to push the fabric in a direction or in the opposite direction.
- the blowing mem- bers are movable, for example under the control of individual commands or under the control of a single command for more blowing members, so as to direct the flows of air in the adequate manner.
- blowing members intended for supporting and feeding the fabric can be replicated in a substantially similar manner also above the path of feed of the fabric, if necessary offsetting the lower blowing members relative to the upper blowing members. In this way it is possible to obtain an oscillation movement, i.e. an undulatory movement of the fabric along its path of feed, so as to facilitate the treatment of the fabric.
- the blowing members can be alternated with suction members so as to facilitate, increase or enhance the circulation of air and therefore the effect of feeding and drying exerted on the fabric along the path.
- the present invention relates to a machine for treating a fabric in continuous, preferably for performing a treatment substantially in open width, comprising: a reversible pneumatic transport duct, a- long which the fabric is fed through a pneumatic thrust alternatively in opposite directions; impact structures, arranged in front of the two ends of the pneumatic duct, against which the fabric is made to impact due to the effect of the pneumatic thrust; and blowing members which generate jets of air for thrust and support; and wherein means are provided to modify the flow rate of air substantially without modifying the thrust onto the fabric.
- the present invention relates to a machine for continuous treatment of a fabric, preferably for performing a treatment substantially in open width, comprising: a reversible pneumatic transport duct, a- long which the fabric is fed through a pneumatic thrust alternatively in opposite directions; impact structures, arranged in front of the two ends of the pneumatic duct, against which the fabric is made to impact due to the effect of the pneu- matic thrust; and blowing members which generate jets of air inclined relative to the direction of feed such that the air introduced in the duct by said blowing members has a component of speed parallel and a component of speed orthogonal to the direction of speed.
- the two components are variable so as to invert the movement of the fabric and/or to modify the overall flow rate of air independently of the pneumatic thrust generated on the fabric.
- the present invention relates to a machine for continuous treatment of fabric, preferably for performing a treatment substantially in open width, comprising: a reversible pneumatic transport duct, a- long which the fabric is fed by means of a pneumatic thrust alternatively in op- posite directions; impact structures, arranged in front of the two ends of the pneumatic duct, against which the fabric is made to impact due to the effect of the pneumatic thrust; first blowing members which generate jets of air inclined relative to the direction of feed such that the air introduced in the duct by said blowing members has a component of speed parallel to the direction of speed so as to generate a pneumatic thrust; and second blowing members which generate jets of air with at least one component substantially orthogonal to the direction of feed for supporting the fabric and/or for increasing the drying effect.
- the first and second blowing members can be adjusted independ- ently of each other, for example to increase the pneumatic thrust without increasing the overall flow rate of air, or for increasing the overall flow rate of air without
- the present invention provides a machine for continuous treatment of a fabric through impact, if necessary during a drying phase, with the possibility of adjusting in a flexible manner the speed of drying and/or the thrust of support and/or the speed of feed and therefore the kinetic energy of the impact against the impact structures, with consequent adjustment of the overall speed of the mechanical treatment.
- figure 1 shows a perspective view of a machine according to the present invention with some parts removed
- figure 2 shows a view analogous to that of figure 1 with the transport duct open
- figure 3 shows a longitudinal section of the transport duct
- figure 4 shows an enlargement of the section of figure 3
- figure 5 shows a partially sectioned perspective view of a machine according to the present invention in a different embodiment
- figure 6 shows a schematic longitudinal section of the central area of the machine of figure 5
- figure 7 shows a longitudinal section similar to that of figure 6 in a further embodiment of the machine.
- Figs. 1 to 4 show a first embodiment of a machine according to the pre- sent invention.
- the machine indicated as a whole with the number 1, comprises a pneumatic transport duct 3, with an approximately rectangular elongated cross section, and therefore characterized by a limited height and by a high develop- ment in the transverse direction of the machine, so as to allow the transport of a fabric in open width.
- the pneumatic transport duct 3 forms part of a pneumatic transport system of the alternate type to move in opposite directions a fabric T, constituted by a knitted or woven fabric, and to cause the impact thereof alternatively against the one or the other of two fixed impact structures 5A and 5B arranged in front of the two ends of the duct 3.
- the feed of the fabric T along the transport duct 3 occurs by means of a flow of air fed through a system of feed and ducts which give an adequate flow rate of air at the adequate pressure in a central area of the pneumatic transport duct 3.
- the transport air is fed to the pneumatic transport duct 3 by means of a fan 5, at the outlet of which a duct 7 is connected, which subsequently subdivides into an upper duct 7A and a lower duct 7B in fluid connection with nozzles with linear development, which extend transversally through the width of the duct 3, as better illustrated in figure 3 and as will be described hereunder.
- the air flow rate in the two ducts, the upper one 7A and the lower one 7B, can be controlled through gates 9A and 9B suitably arranged along said ducts, for example in the connecting area between the ducts 7A, 7B and the common supply duct, coming from the central fan 5.
- the ducts 7A, 7B can be put into communication with nozzles 11A, 13A and 11 B, 13B arranged respec- tively above and below the substantially approximately horizontal median plane of the pneumatic transport duct 3.
- the nozzles 11 A, 13A are oriented in opposite directions so as to push a flow of air towards the one or the other of the two ends indicated with 3A and 3B in figure 3 of the pneumatic transport duct 3, in front of which the impact structures 5A, 5B are arranged, which, in the illus- trated example, are grille-shaped.
- valves or gates 15A, 15B are associated, which, rotating according to the double arrow indicated in figure 3, allow to divert the flow of air towards the nozzles 11 A, 11 B, or towards the nozzles 13A, 13B.
- the movement of the gates or valves 15A 1 15B is controlled in such a manner that they are either both in the position of figure 3 or both in the rotated position to convey the air to the nozzles 11A, 11B, so as to obtain a correct flow of transport air in one or the other direction of feed of the fabric T, indicated in figure 3 by the arrows FS and FD.
- the collection areas are indicated with the numbers 17A 1 17B respectively, and are defined by curved plates into which the fabric T falls after having impacted the structure 5A or 5B respectively.
- motorized rollers 19A and 19B are arranged, which facilitate lifting of the fabric from one or the other of the two accumulation areas 17A, 17B, so as to facilitate the insertion thereof in the corresponding mouth of the pneumatic transport duct 3.
- the fabric is fed inside the mouth 3A of the duct 3 by means of the motorized roller 19A which facilitates lifting of the fabric.
- the fabric T exits with a trajectory developing substantially above the corresponding motorized roller 19B, and then it impacts against the impact structure 5B.
- the arrangement of the pneumatic transport duct 3 can vary so as to reverse the direction of impact of the fabric (arrows FS and FD), with an arrangement of this type, wherein at the exit end the fabric T is not in contact with the respective motorized roller 19A, 19B, it is possible to maintain the two rollers 19A, 19B rotating always in the same direction, indicated by the arrows in figure 3, i.e. in the direction which fa- cilitates the feed of the fabric inside the duct 3 through the respective end 3A, 3B. Therefore, it is not necessary to modify the direction of rotation of the rollers 19A 1 19B in a manner synchronized with the rest of the machine, with consequent simplification of the structure of the machine.
- the accumulation areas 17A, 17B are housed in spaces 21 A, 21 B of the machine connected at the top with suction hoods 23A, 23B.
- the suction hoods are arranged at the opposite side from the ends 3A, 3B of the pneumatic transport duct 3 relative to the corresponding impact structure 5A, 5B. In this way, by extracting the air through the hoods 23A, 23B the effect of transfer of the fabric obtained by means of the flow of air injected in a direction or in the other in the pneumatic transport duct 3 through the nozzles 11A, 11 B or 13A, 13B, increases.
- the suction hoods 23A, 23B are connected, through ducts 25A, 25B, to a common suction duct 27 of a fan 29, which ejects the sucked air through a chimney 31.
- the flow rate of air sucked through the hoods 23A, 23B and ejected through the fan 29 and the chimney 31 is only a part of the air circulating inside the machine, as a significant part of the flow rate of air exiting from one or the other of the ends of the pneumatic transport duct 3 is sucked through the one or the other of two suction mouths, one of which is indicated with the number 33A in figures 1 and 2 (the other being arranged in a symmetrical manner on the opposite side of the machine, not visible), inside a heating battery 37 arranged nearly below the pneumatic transport duct 3.
- heating and/or conditioning means are arranged, for example a heating system with a burner, or an electric heating system, a diathermal oil system or a system of any other nature.
- a heating system with a burner or an electric heating system, a diathermal oil system or a system of any other nature.
- the quantity of recirculated air relative to the quantity of ejected air can be adjusted.
- the humidity extracted from the fabric T under processing is discharged.
- the consumption of energy necessary for the heating decreases.
- the air is taken from the battery 37 through the already mentioned fan 5 to feed the pneumatic transport nozzles 11 A, 11 B, 13A, 13B.
- the connection between the fan 5 and the battery 37 is not shown for the sake of clarity of the drawing.
- a further flow rate of air is sucked from the battery 37 by means of a different suction system, which injects air in the duct 3 according to a direction nearly orthogonal to the direction of transport of the fabric as described below.
- two separate fans 41 A and 41 B are provided. It is also possible to provide for a single fan which has two separate supply ducts for the purposes described below.
- the two fans 41 A, 41 B can be adjusted independently one of the other, for example trough respective inverters, to modify the flow rate of air on the two faces of the fabric T. If only one common fan is provided, it is possible to provide systems of valves or gates analogous to that indicated with 9A, 9B and previously described. It is also possible to use only one fan instead of three fans 5, 41 A, 41 B, with a suitable system for regulating the flow rate and the pressure in the downstream ducts towards the pneumatic transport duct 3. However, this configuration is more complex and difficult to be controlled and adjusted.
- the fans 41 A and 41 B are connected through respective ducts 43A, 43B to an upper plenum 45A and to a lower ple- num 45B respectively.
- the plenum 45A is in turn in fluid connection with two upper distribution boxes 47A, 47B, whilst the plenum 45B is in fluid connection with two lower distribution boxes 49A and 49B partially shown in figure 1 and in figure 2.
- the boxes 47A, 47B are arranged above the pneumatic transport duct 3, whilst the boxes 49A, 49B are arranged below the duct.
- the apertures 51A can have a circular cross section, but it is also possible to use other shapes, for example rectangular, square or any polygonal shape with a given number of sides. It is also possible to provide apertures 51 A with elongated shape, i.e. slots, oriented towards the direction of feed of the fabric or in a direction transverse relative to the feed of the fabric.
- the aper- tures 51 A are preferably obtained through deep-drawing of the sheet 53A which forms the upper wall of the pneumatic transport duct 3, so that each aperture 51 A is surrounded by an area of sheet curved towards the inside of the respective box 47A or 47B.
- the curved areas of the sheet 53A are indicated with 55A.
- This curvature 55A of the sheet 53A avoids the presence of edges along the surface delimiting the pneumatic transport duct 3 at the top. Therefore the fabric T being fed in one or the other direction inside the duct 3, is not damaged even if it enters into contact with the upper surface defined by the sheet 53A.
- apertures 51 B delimited by curved areas 55B of a sheet 53B defining the lower wall of the pneumatic transport duct 3 is provided below the path of the fabric T .
- the curvature of the sheet 53B in 55B has the same purpose as the curvature 55A described above.
- the upper apertures 51A are offset relative to the lower apertures 51 B, as shown in figure 4, although a configuration would also be possible, wherein these apertures 51 A, 51 B are in reciprocal correspondence.
- the lower apertures 51 B therefore form a blowing system for the generation of a flow of supporting air from the bottom to the top of the fabric T during the feed thereof, whilst the apertures 51 A form secondary pneumatic members (blowing or sucking) which generate a flow of air discordant or concordant with that generated by the blowing pneumatic system defined by the lower apertures 51 B.
- the fans 41 A, 41 B inject inside the pneumatic transport duct 3 a high flow rate of air which acts from the bottom to the top on the fabric T through the apertures 51 B and from the top to the bottom through the apertures 51A.
- the flow rate from the bottom to the top through the apertures 51 B is greater than the flow rate through the upper apertures 51 A.
- the apertures 51 A can be omitted with all the set of air supply ducts; in this case inside the pneumatic transport duct 3, in addition to the transport air through the nozzles 11A 1 11 B, 13A, 13B, only air from the bottom to the top is injected for supporting the fabric T.
- the air injected from the nozzles 11 A, 11 B 1 13A 1 13B is of low amount and at high pressure, so as to impart the required speed to the fabric T in order to impact it against one or the other of the impact structures 5A, 5B
- the air injected through the apertures 51 B and, if necessary, through the apertures 51 A (or sucked through the apertures 51A) can be air at low pressure and high amount.
- This additional air in addition to give a floating effect of the fabric decreasing the tension thereof, also allows to accelerate in a controllable manner the drying of the fabric, which is therefore to a large extent independent of the mechanical processing.
- the flow rate of air from the bottom and from the top of the fabric can be adjusted in a suitable manner, so as to obtain the required force for supporting the fabric, and an adequate drying effect.
- the upper flow rate can also be lower or it can be absent, for example by closing the corresponding duct, or stopping the corresponding fan. In other cases the flow rate from the top could be not provided, or it could be negative (suction).
- the machine 1 described above can be inserted inside a continuous processing line, which provides one or more additional sec- tions upstream and/or downstream of the machine 1 and/or systems for the fabric to enter into or to exit from the spaces 21 A, 21 B.
- the machine described above operates in all as follows: Firstly, the desired quantity of fabric is loaded inside the machine, forming a stock in one or in the other of the areas 17A, 17B of the spaces 21A 1 21 B. In the illustrated ex- ample, one can assume that the stock of fabric is loaded in the area 17A, bringing an end of the fabric through the machine till the opposite exit. Once the fabric has been loaded, the flow of transport air is actuated, generated by the fan 5, so as to transfer the fabric from the accumulation area 17A towards the ac- cumulation area 17B, so as to cause the impact of the fabric against the impact structure 5B, until the stock in the accumulation area 17A is all but finished. This condition is detected for example through load cells in a known manner, or through any other sensor or suitable detecting means.
- the position of the valves 15A, 15B is inverted so as to invert the direction of feed of the fabric inside the transport duct 3 and therefore to extract it from the accumulation area 17B, with the aid of the roller 19B, and to impact it a- gainst the impact structure 5A.
- the cycle is inverted again. All the process is performed for the time necessary to obtain the mechanical working of the fabric and/or the drying thereof till the desired degree.
- the air blown orthogonally or nearly orthogonally to the fabric through the apertures 51 A, 51 B, or the air injected through the apertures 51 B and sucked through the apertures 51 A, contributes to reduce the traction stresses on the fabric, by making it floating inside the duct 3, and dries the fabric in an manner independent from the mechanical processing thereof.
- the fabric is made to move slightly forwards as a whole from one of the two ends of the machine towards the other, feeding in a gradual manner the fabric in the space 21A and picking it up in a gradual manner from the space 21 B.
- each section of the fabric remains inside the machine for a prolonged time and is subjected to a series of impacts by reversing the feeding inside the pneumatic transport duct 3, and going therefore to impact against the impact structures 5A, 5B alternatively.
- the control of the feed of the fabric is so that after the required quantity of impacts and/or the required time inside the machine, each section of fabric is extracted and if necessary inserted in a section downstream so as to be subjected to other processing or wound in a roll, or accumulated in folders in a cross-lapper or other.
- Figures from 5 to 7 show a different embodiment of the machine according to the invention in two possible variants.
- the machine indicated as a whole with the number 101 , comprises a pneumatic transport duct 103, whose configuration will be better illustrated with reference to figure 6.
- Means for supplying air are associated to the pneumatic transport duct 3, being part of a transport system in which the path of feed of the fabric is defined.
- a plenum or an upper storage tank 104 to which the air is supplied from a forced-draught fan 105 through a duct 107.
- a plenum or upper storage tank 110 to which the air is supplied from a fan 106 through a duct 109.
- the air supplied to the transport system comprising the pneumatic transport 103, by the forced-draught fans 105, 106 through the ducts 107, 109, is recovered and sucked through the hoods 117 and the duct 119 by means of the suction fan 121, so that a balanced flow is substantially generated, partially pu- shed by forced-draught fans and partially sucked by the suction fan.
- valve 122 arranged in the duct 119, the suction is exerted alternatively through the one or the other of the two suction hoods 117, according to the conditions of feed of the fabric, as described below.
- the valve 122 is omitted and the suction is continuous through both the suction boxes 117.
- a part of the air coming from the pneumatic transport duct 103 can be taken again and returned into circulation, instead of being ejected through a chimney 121 A connected to the suction fan 121.
- apertures 116 are provided, through which the air can be sucked and transported through ducts 118 to the entrance of the forced- draughts fans 105, 106.
- Rotating filters can be associated with the apertures 116.
- the pneumatic transport duct 103 has a limited height H and a great width in a direction orthogonal to the plane of figure 6, and more in particular a width which allows the fabric T to advance in an arrangement substantially in width, i.e. substantially extending in the cross direction, i.e. in the direction of the height of the fabric which represents the cross direction of the machine.
- the fabric is not integrally extending in cross direction, but its transverse dimension is greater than the transverse dimension of the duct 103.
- the pneumatic transport duct 103 is defined by an upper wall 103A and by a lower wall 103B.
- blowing members 131 are associated, having preferably the shape of ducts with a cross section elongated transversally to the machine direction and to the direction of feed F of the fabric along the pneumatic transport duct 103.
- These blowing members terminate into apertures 131 A in the lower wall 103B of the pneumatic transport duct 103, which have walls inclined by opposite angles ⁇ rela- tive to the longitudinal direction of the duct 103.
- blowing members 131 Inde- pendently of the system used for controlling and modifying the inclination of the blowing members 131 , these all will be preferably oriented in one or the other of the directions represented in figure 6 in a dotted line and as a continuous line respectively. It is also possible to provide some of the blowing members 131 o- riented in a direction substantially orthogonal to the direction of feed F of the fabric T in the pneumatic transport duct 103. However, in general a high number of and preferably the major part of the blowing members 131 , or all the blowing members 131 will be oriented in the same direction so as to exerted in various points of the pneumatic transport duct 103 a support thrust in vertical direction (i.e. substantially orthogonal to the direction of feed) and a thrust in the direction of feed on the processed fabric T.
- a support thrust in vertical direction i.e. substantially orthogonal to the direction of feed
- blowing members 132 substantially similar to that of the blowing members 131 is associated to the upper wall 103A of the pneumatic transport duct 103.
- a relevant part of, or preferably all the blowing members 132 are oriented in the same direction, concordant with that of the lower blowing members 131.
- the jets generated by the blowing members 132 are such as to cause also a thrust substantially orthogonal to the direction of feed.
- suction areas can be provided, arranged for example only in some zones or in an alternate manner between the blowing members 131 and/or between the blowing members 132.
- suction zones or members 133 are provided along the lower wall 103B of the pneumatic transport duct 103, in alternate position relative to the positions of the blowing members 131.
- a similar arrangement of suction members 135 is provided along the upper wall 103A of the duct 103.
- the blowing members 131 , 132 are arranged in reciprocally offset positions along the direction of the path of feed of the fabric T in the duct 103.
- the fabric takes an undulatory path, as schematically indicated in figure 6.
- This effect can be emphasized by the alternate arrangement of the suction members 133, 135. These latter, being pref- erably arranged alternating with the blowing members 131 , 132, will be offset with respect to one another.
- the suction members 133, 135 allow an extraction of air from the pneumatic transport duct 103 in different positions along the development of the duct, so as to have inside the duct 103 a circulation of air with a flow rate greater than that necessary to obtain the impact of the fabric against the grilles 113.
- each suction member 133, 135 can be provided with a sort of hood 133A, 135A, inside which the air gathers and from which the air is extracted, which enters into it through holes 133B, 135B provided in the corresponding zones of the wall 103B and 103A respectively.
- the hoods 133A, 135A can be connected to the ducts 119, for example by the interposition of gates or flow rate regulating valves, so as to adjust the flow rate of air through the suction members 133, 135, according to the processing requirements. It is also possible to provide different adjustments for the upper and lower suction members 135, 133 respectively, or also independent adjustments for each suction member 133 and for each suction member 135 or for group of said members. Adjusting the suction through the hoods 135A, 133A of the suction members 135 and 133 allows to modify the quantity of air fed in the pneumatic transport duct 103 which does not contribute to mechanical processing, i.e. to the thrust of the fabric against the grilles 113, but which mainly serves for conditioning of the fabric, i.e. for removing the humidity therefrom.
- the function of this machine is clearly apparent from the description a- bove.
- the fabric T is fed in continuous to the machine in a known manner, and it forms a stock of fabric on the input cradle 115 and on the output cradle 115.
- the overall speed of the fabric across the machine is substantially lower than the speed with which the fabric is fed along the pneumatic transferring duct 103 in the two directions alternatively, so that each portion of fabric is subjected to a certain number of movements in opposite directions inside the pneumatic feed duct 103.
- blowing members 131 and 132 are oriented in one phase in a first direction (for example in the position illustrated with a continuous lines in figure 6) so as to feed the fabric forming the stock in one of the two cradles 115 towards the opposite cradle 115. Because of the speed pneumatically imparted to the fabric by the air injected in the pneumatic transport duct 103, the fabric impacts against the grille 133 on the exit side, thus being subjected to a mechanical processing.
- the angles of inclination of the blowing members 131 , 132 are changed, so as to invert the direction of feed of the fabric T in the duct 103, so that the fabric is fed from the cradle, in which the stock accumulated, to form again a new stock in previously emptied the cradle.
- This movement combined with the slow movement of gradual feed of the fabric allows continuous working.
- the exhaustion of the stock on the cradles 115 can be detected by means of a load cell or in other suitable manner.
- figure 7 a modified embodiment of the machines of figures 5 and 6 is shown.
- the same reference numbers indicate the same or equivalent parts to those described with reference to figures 5 and 6 and they will be not described again.
- the embodiment of figure 7 differs from the embodiment of figures 5 and 6 in that the lower blowing members 131 and upper blowing members 132 are fixed instead of oscillating, and in that the direction of feed of the fabric is reversed by actuating one or the other of two series of blowing members having alternate inclinations both above and below the path of feed of the fabric. More in particular, in figure 7 the number 131X indicates the blowing members oriented from the left to the right in the figure, whilst the number 131 Y indicates the blowing members oriented from the right to the left.
- reference numbers 132X and 132Y indicate the two series of blowing members oriented from the left to the right and from the right to the left respectively.
- the air jets generated by these blowing members in fact, have a com- ponent oriented from the left to the right (in the figure) in addition to a component oriented in vertical direction to impart to the fabric the support force and the undulatory movement.
- blowing members oriented orthogonally to the direction of feed of the fabric or to provide blowing members inclined in the two directions only in the lower part or only in the upper part of the pneumatic transport duct 103, although this is less advantageous.
- the blowing members 131 , 132, 131X, 132X, 131 Y, and 132Y will have exit mouths with a substantially slot-shaped development, i.e. elongated in the cross direction, i.e. orthogonally to the machine direction represented by the arrow F (direction of feed of the fabric). It is also possible for each blowing member to comprise a row of blowing mouths, for example circular or elliptical in shape, aligned in the cross direction, although this is less advantageous.
- the inclination of the air jets can be adjusted, and not only set between two fixed values. In this way it is possible to obtain a further adjustment possibility, for example it is possible to adjust the flow rate of supporting and drying air, maintaining the thrust on the fabric constant. In fact, increasing or decreasing the angle of the flow jet relative to the direction of feed of the fabric, with the same air flow rate, the component of the air speed parallel to the direction of feed of the fabric decreases or in- creases, and thus the thrust on the fabric decreases or increases. Alternatively, by regulating the inclination of the air jets it is possible to maintain the component of thrust on the fabric unchanged, increasing or decreasing the air flow rate.
- a given degree of mechanical treatment constant on the fabric i.e. for example a constant impact kinetic en- ergy and a constant number of reversals of the movement over the time unit
- increasing or decreasing the drying air flow rate i.e. for example a constant impact kinetic en- ergy and a constant number of reversals of the movement over the time unit
- the fabric shall be dried in a more energetic manner it is possible to increase the air flow rate and to increase the angle of incidence of the air on the fabric, so as to maintain the thrust component constant, so that the fabric is subjected to a more energetic drying without an increase of the pneumatic thrust on it.
- the drying is too fast, it is possible to decrease the air flow rate by
- the upper and lower blowing members 131 , 132 are offset relative to each other, and intercalated with suction zones. In other embodiments it is possible to provide that the upper and lower blowing members 131, 132 correspond to each other and/or that further suction zones 133 are provided intercalated with consecutive upper blowing members 131 and/or with lower blowing members 132, or that these suction zones are completely omitted.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000100A ITFI20080100A1 (en) | 2008-05-19 | 2008-05-19 | "MACHINE FOR THE PROCESSING OF FABRICS IN WIDE AND RELATIVE METHOD" |
PCT/IT2009/000217 WO2009141841A1 (en) | 2008-05-19 | 2009-05-15 | Machine for the processing of open - width fabrics and related method |
Publications (2)
Publication Number | Publication Date |
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EP2286013A1 true EP2286013A1 (en) | 2011-02-23 |
EP2286013B1 EP2286013B1 (en) | 2012-07-11 |
Family
ID=40302614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP09750287A Active EP2286013B1 (en) | 2008-05-19 | 2009-05-15 | Machine for the processing of open - width fabrics and related method |
Country Status (3)
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---|---|
EP (1) | EP2286013B1 (en) |
IT (1) | ITFI20080100A1 (en) |
WO (1) | WO2009141841A1 (en) |
Cited By (1)
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IT201700039863A1 (en) * | 2017-04-11 | 2018-10-11 | Technoplants S R L | Module, plant and method for the treatment of a non-woven fabric to obtain a volumized non-woven fabric |
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IT1399733B1 (en) * | 2010-05-05 | 2013-05-03 | Coramtex Srl | "METHOD FOR THE TREATMENT OF A FABRIC IN THE LARGE AND ITS WORKING LINE" |
WO2011138810A1 (en) | 2010-05-05 | 2011-11-10 | Coramtex S.R.L. | Method for treating an open width fabric and related processing line |
IT1411119B1 (en) * | 2010-11-04 | 2014-10-10 | Coramtex Srl | "METHOD AND MACHINE FOR THE TREATMENT OF A WIDE FABRIC" |
SE536108C2 (en) * | 2010-11-16 | 2013-05-07 | Andritz Tech & Asset Man Gmbh | Drying box comprising at least two zones for drying a cellulose pulp web |
ITFI20110118A1 (en) * | 2011-06-13 | 2012-12-14 | Coramtex Srl | "METHOD TO TREAT A FABRIC AND ITS MACHINE" |
US20150218665A1 (en) * | 2012-09-21 | 2015-08-06 | Karl Rohr | Softening process and system for roll goods |
US10167587B2 (en) * | 2014-03-05 | 2019-01-01 | Biancalani S.R.L. | Method and machine for treating textile fabrics with an adjustable air flow |
ES2748449T3 (en) * | 2014-05-15 | 2020-03-16 | Inspiron Engineering Private Ltd | Manifold |
ITPO20150006A1 (en) * | 2015-03-22 | 2016-09-22 | Biancalani Srl | APPARATUS FOR THE FLUID TRANSPORT OF A TISSUE IN A TREATMENT TUMBLER |
CN113039321A (en) * | 2019-06-11 | 2021-06-25 | 比安卡拉尼有限公司 | Continuous open width washing machine and method for fabrics |
IT202000023278A1 (en) | 2020-10-02 | 2022-04-02 | Pentek Textile Machinery S R L | PNEUMATIC TRANSPORT SYSTEM FOR FABRIC |
IT202000026290A1 (en) * | 2020-11-04 | 2022-05-04 | Pentek Textile Machinery S R L | TREATMENT MACHINE FOR THE DRAWING AND DIMENSIONAL STABILIZATION OF THE FABRIC |
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ITFI20010124A1 (en) | 2001-07-06 | 2003-01-06 | Biancalani S P A | MACHINE FOR DRYING AND TREATING CONTINUOUS FABRICS WITH ROTATING BASKET AND VARIABLE INCLINATION |
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ITFI20040005A1 (en) | 2004-01-09 | 2004-04-09 | Coramtex Srl | MACHINE WITH CONCENTRIC CIRCLES FOR FABRIC TREATMENT AND RELATED PROCEDURE |
ITFI20040183A1 (en) | 2004-08-25 | 2004-11-25 | Coramtex Srl | MACHINE AND METHOD FOR THE TREATMENT OF A FABRIC BOTH WIDE AND ROPE |
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Also Published As
Publication number | Publication date |
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ITFI20080100A1 (en) | 2009-11-20 |
WO2009141841A1 (en) | 2009-11-26 |
EP2286013B1 (en) | 2012-07-11 |
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