FR2620432A1 - BOBINER FOR DRYING AND ENABLING FILES - Google Patents

Abstract

Winding machine for drying and finishing yarns, in particular of the type with medium long fibers such as wool, acrylics and their blends, in which the winding unit 10 has a support structure 11, determining a working front 18 single, to which the following groups are linked in mutual cooperation: the group for the distribution and formation of turns 13 of the yarn 14; - the transport and treatment group 15 of the yarn 14; - the winding unit or collection 12 of the yarn 14. The drying and finishing of the yarn 14 are carried out continuously by application of heat by means of microwaves 30 propagating in the substantially transverse direction available to the yarn 14 as it passes through said microwaves 30.

Description

! The present invention relates to a winder for drying

  and finishing of yarns or yarns.

  More particularly, the invention relates to a suitable winder for continuous execution of drying and finishing of yarns by the application of heat by means of microwaves. The winder of the invention is advantageously used in the production of long fiber yarns with economic value, such as wool and previously dyed and partially dried wool-based blends in order to complete the drying and drying.

  restore to the yarn its initial characteristics altered in particular.

  bind during dyeing operations.

  It is already known, according to the state of the art, machines and apparatus used in the treatment and continuous winding

  of spun yarns, in particular of the wool-type fiber type.

  The machines are generally suitable for processes that give volume to the yarn by shrinking the yarn or parts thereof.

of its constituent fibers.

  The operation which consists in giving volume to the yarn is carried out by application on it of steam or air heated by

electrical resistances.

  Microwave-based apparatuses were also treated in volume-imparting processes or in the treatment of continuous-filament yarns. Not all known apparatuses and machines solve the problem of efficient continuous drying and finishing of yarns. advantageously of the wool type while simultaneously producing the winding of the yarn in packages or coils immediately

  usable for end jobs.

  As part of the Inventions the Applicant has studied experiment.

  ted and realized a winder able to solve all the problems

aforementioned of the known art.

  The above-mentioned objective as well as others which will become clear

  below are essentially achieved according to the invention by

  a winder for the drying and finishing of yarns, especially

  of the medium-long fiber type such as acrylic wools and mixtures thereof, wherein the winding unit has a support structure defining a unique working edge to which the following groups are cooperatively interconnected: - the distribution group and spinning of the yarns - the yarn transport and processing group - the yarn winding or gathering unit, said drying and finishing of the yarn being carried out continuously by applying heat through microwaves propagating in the yarn the sense substantially transversal to the provision

  yarn as it passes through said microparticles.

waves.

  Thus, the machine of the invention has a front or facade of work for the operators on the site of which are touvent

  positioned the yarn spools.

  On the same facade is also present the unit of winding or collection assigned to the conditioning of the coils to

the output of the machine.

  The machine has a longitudinal structure on which are installed several equal work units as it is

  common in many textile machines.

  The yarns as withdrawn from the supply reel is transferred by suitable means to the front or facade opposite to that of work, and is deposited substantially without

  voltages on a transfer conveyor belt.

  The deposit takes place in quadrilateral-shaped turns whose two diagonals are respectively parallel and orthogonal to the direction of advancement of the strip and with a very tight pitch for them.

  reasons which will be explained below.

  From the transfer conveyor belt the spun yarn is deposited on a work strip which constitutes the treatment plan

of the yarn.

  Said working strip travels in the opposite direction to that of the transfer band to the working front of the

  machines and is located below said transfer band.

  In this way the reversal of the turns is achieved by

  view of their correct consecutive reeling.

  In others, the working strip progresses at a speed greater than the speed of the transfer band, which consequently causes, during the transfer between said strips, an elongation of the quadrilateral turn in the direction of travel of the strip.

working.

  This last transits by supporting the rhombus-shaped turns fairly elongated in a microwave device, known

in itself.

  Said devices of appropriate shape and length essentially has a microwess propagation duct arranged transversely to the direction of travel of the working strip and

  crossing said band several times over the necessary length.

  The conduit is suitably connected to a microwave source. In the context of the invention the Applicant has verified by experiments that the optimal use of the energy provided by the microwaves and consequently the optimal drying can

  be carried out all over the yarn by presenting only to micro-

  waves as much possible mass of turns arranged in an orderly manner and by orienting said turns more transversely

  possible to the microwave flow lines.

  For this reason the turns are first deposited with a very tight pitch and then they are lengthened in the direction of progress

Of the band.

  The removal of the water present in the yarns takes place

  microwave microwaves by evaporation from the inside of the fibers. Under the effect of the steam crossing from the inside of the fibers to the outside, the ennobling action is realized

  on the yarn by said evaporation.

  The yarn, always supported by the band of work is consecu-

  carried out in the unwinding zone in which a flexible element device located immediately above the

  reels ensures the unwinding of one turn at a time.

  This is necessary to avoid breaks on the yarn or

  defects on the winding reel being packaged.

  The yarn then goes to the winding unit or picks

  known in be after a possible waxing operation.

  The machine is provided with devices for controlling the position of the turns on the strip of work in the unwinding zone, said control devices co-operating with devices for varying the speed of depot and transport of the turns, to adapt

  the speed of deposit of the turns at their winding speed.

  During the start-up phase, and as a result of the first deposit and transport of the turns, the machine is also automatically adjusted to a pitch of about 4 to 10 times higher.

  at the normal pace of work depending on the type of yarn processed.

  The aforementioned procedure is intended to reduce the crossing time of the microwave device and to reduce consequently

  for the operator of unproductive idle time on the machine.

  Characteristics and advantages of the invention will emerge

  still in the subclaims, as well as reading the

  detailed description which follows, of an exemplary embodiment

  given by way of indication, but in no way limiting with reference to the accompanying drawings, in which: FIG. 1 represents a schematic side view of a winding unit according to the invention; FIG. 2 illustrates the application of a microwave device known per se; and FIG. 3 schematically shows the arrangement of the turns of the yarn on the web of work according to the invention. Referring to said figures, it can be seen that the winding unit 10 has a support structure 11 for the winding unit or collection 12s the group. of distribution and formation of the turns 13 of the yarn 14, the group and transport and processing of the yarn 14 and the evacuation device 16 of the winding coils

17 made up.

  The winding unit 10 has a working front or fagade

  18, on the site of which is conveniently supported and

born the 117th feed coil

  Said coil 117 has advantageous but nonlimiting-

  a quantity of water corresponding to a percentage of the order

  14-6C0% of the weight of yarn 14 contained in this reel

  this is the residue normally present after centrifugation.

  The yarn 14 is circulated towards the rear edge of the winding unit 10 by a duct 19 which is put under suction in the starting phase of the machine or in case of breaks by

  an automatic transfer of yarn 14.

  At the inlet of said duct 19 is provided a control device

  in the presence of a pre-guide wire 20 which blocks any irregularities

  unwanted properties of yarn 14 or possible irregularities in

the unwinding of bobfine 117.

  A supercharging device 21 decreases the voltage of the

  spun 14 at an optimum value for consecutive winding dep4t.

  The group of distribution and formation 13 of the turns, known in is constituted by a rotating element 22 provided with screws

  de dép8t and formation 23 of the spirals9 ordered at 24.

  The rotating element 22 distributes the yarn 14, as it comes from the conduit 19, in quadrilateral-shaped turns on a transfer conveyor belt 25 actuated in the direction of the

arrow 26.

  We keep the pace of dep8t very tight. for example of the order of 0.3195 mm depending on the type of yarn. For example for a yarn of wool or wool blend of title Nm 2/32, said not

is about 0.5-096 mm.

  Through a deflector 27, the yarn 14 in turns is transferred to the working strip 28, actuated in the direction

of the arrow 29.

  The Applicant has found that it is advantageous in the context of the invention to communicate to the working band 28 a speed greater than that of the conveyor belt 259 by a percentage amount in the range from 201 to 80 % depending on the type of yarn The numeral 30 designates the microwave device

  of the type shown schematically in FIG.

  Said device 30 consists of a duct 31, connected to a microwave source 32, and has a plurality of sections 33 intercrossing repeatedly in the transverse direction.

working band 28.

  Said band 28 passes through the sections 33 through the windows 34 of these cises so that the turns 359 deposited on this

  band 28 in elongated rhombs, are presented

  specifically to the direction of propagation of microwaves.

  The working strip 28 is made of a pernatable material

  microwaves, advantageously Kevlar reinforced with glass fibers.

  In the unwinding zone 36, the turns 35 of the yarn 14 are harnessed in their unwinding by a flexible element device 37, advantageously er. plastics which ensures the unwinding

one by one of said. turns 35.

  A pie-guide-control wire 20 cooperates with the flexible element 37. The yarn 14 then passes on a wire tensioner 389 if necessary it is waxed at 39, then is wound in coil 17 on the unit

winding or collection 12.

  Once the manufacture of the coil 17 has been completed, said coil 17 is discharged along the winder by the evacuation device 16. The winding unit 10 has an actuating unit 40 which, by means of suitable flexible elements, in movement the winding unit 129 the distribution group and

  formatior. 13 turns and the transport group 15.

  Said generator group 40 also has a reduction gearbox for the variation of the pitch between the turns 35 in the starting phase of the winding unit 10 and the means for varying the winding speed and transport speed 35

  according to the position of said turns 35 in the devitalization zone.

  As noted by a device 41, such as for example a photocell or feelers for adapting the speed of unwinding of the turns 35 to the winding speed, it is understood that the invention can be implemented according to numerous modifications. and variants without departing

of his frame and his spirit.

Claims (7)

CLOTHING S lo winder for drying and finishing of yarns, in particular of the medium-long fiber type such as wool, acrylic materials and mixtures thereof, characterized in that the winding unit (10) has a support structure ( 11), determining a single work face or face (18), to which the following groups are mutually cooperating: - the group of distribution and formation of turns (13) of the yarn (14), - the transport and treatment group (15) of the yarn (14); - the winding or gathering unit (12) of the yarn (14), said drying and finishing of the yarn (14) being carried out continuously by the application of heat via micro- waves (30) propagating in the direction substantially transverse to the arrangement of the yarn (14) as it passes through said microwaves (30).   2. Winder according to claim 1, characterized in that the yarn (14) is deposited substantially tensionless on a conveyor belt (25) in turns (35) in the form of a quadrilateral, said turns (35) having a very tight pitch, Preferably, the winder according to claim 1 or 2, characterized in that the turns (35) are transferred from the conveyor belt (25) to a working strip (28) located at below this band (25).   4. Winder according to any one of the preceding claims,   characterized in that the working strip (28) has a forward speed greater than that of the conveyor belt (25),   advantageously of the order of 20-80%.   Winder according to one of the preceding claims,   characterized in that the working strip (28) is actuated in a direction (29) opposite to the direction of advancement   (26) of the conveyor belt (25).   6. Winder according to any one of the claims   characterized in that in the unwinding zone (36) of the turns (35) of the yarn (14) there is provided a flexible element device (37) located immediately above said zone unwinding (36).   7. Winder according to any one of the claims   preceding, characterized in that the pitch of the turns (35) on the   conveyor belt (25) is subject to an automatic variation   in the starting phase of the winding unit (10).   8. Winder according to any one of the claims preceding,   characterized in that the deposition rate of the group of dis-   tribution and formation (13) of the turns and the speed of a   the transport group (15) of the yarn (14) are   in a coordinated way, in cooperation with a detector group (41).   9. Use of the winder according to any one of preceding claims,   characterized in that the supply coil (117) of the winding unit (10) has a relative humidity from 14% to 60%.