ITUD940056A1 - PROCEDURE FOR STARTING AND ENDING THE WINDING OF METAL WIRES AND DEVICE PERFORMING THIS PROCEDURE - Google Patents

Description

Description of the invention having as title:

"PROCEDURE FOR STARTING AND ENDING THE WINDING OF METAL WIRES AND DEVICE PERFORMING THIS PROCEDURE"

FIELD OF APPLICATION

The present invention relates to a method for starting and ending the winding of metal wires and the device which carries out this method as expressed in the relevant main claims.

More specifically, the invention relates to procedures, and the relative actuator units, which are applied on metal wire winding machines to make the start and end phases of winding of the metal wire on the reels completely automatic, the reels being large size.

The invention is applied to metal wire winding machines as obtained from drawing or rolling operations, whether they are cold or hot.

In the present invention, the term metal mainly refers to products with a round, oval, trilobate, square, rectangular or hexagonal section, having a diameter that can even reach 14-16 mm.

STATE OF THE TECHNIQUE

The problems associated with the automatic winding of the metal wire and in particular with the operations of ending and starting the winding itself are known in the art.

Once the bobbin is completed, it is stopped and the thread is interrupted in order to evacuate the full bobbin and replace it with an empty bobbin.

The end of the wound thread must be positioned on the bobbin itself to hold it while the other end of the thread must be positioned and held on an empty bobbin to start a new winding operation.

The start-up and end-of-winding operations are very delicate and if they are performed in an ineffective manner, they can cause defects in the completed bobbins, such as for example a release of the wound thread and / or a bad aesthetic appearance of the wound roll.

In the event that these operations are carried out manually or with partially automatic auxiliary means, these involve prolonged downtime, use of labor, operational difficulties, possibility of errors and / or non-optimal results, prolonged interruption of the wire feeding and still other problems.

The document US-A-3, 994,05 8 describes a device suitable for shaping the tip of the wire for its automatic fixing on a reel.

In this case, however, the prior document deals with coils of small dimensions, arranged during winding with a horizontal axis and used for winding small diameter copper wire or thin wire in general.

Document EP-A-0439810, in the name of the same proponent, illustrates a device suitable for the automation of the winding end and start phases applied to an automatic winding machine.

Said device is applied in the sector of winding large-sized metal wire, for winding on empty reels which can even reach 800 kg, and substantially concerns the same application sector as that relating to the present invention.

The present invention, however, aims to further improve these winding end and start steps, advantageously, but not exclusively, using suitable decomposable reels arranged, in order to improve the quality of the final product in terms of perfect winding and sealing of the thread on the reel.

For this reason, the present applicant has studied, tested and implemented the present invention.

EXPOSURE OF THE FOUND

The present invention is expressed and characterized in the respective main claims.

The secondary claims expose variants to the main solution idea.

The method and the device according to the invention are designed to automatically perform the procedures for ending the winding of wire on a completed reel and for starting a new winding of the wire on an empty reel.

The devices which carry out said procedures substantially provide means for anchoring the tail end of the wire, after its shearing, on the completed reel in order to be able to evacuate it and means for hooking the tip end of the wire to an empty reel in order to start a new one. winding.

According to the invention, the device is suitable for cooperating with reels having both vertical and horizontal winding axes.

The present invention cooperates, advantageously although not necessarily, with an automatic system for packaging and evacuating reels of metal wire, for example of the type illustrated in-A-0444311 in the name of the same proponent.

The invention also provides for the possibility of being able to automatically take a sample of the metal wire before starting the winding on the empty reel.

The operating units that make up the device according to the invention are suitable for cooperating with a yarn guide device which feeds the yarn as obtained from rolling or drawing plants.

The thread guide device translates parallel to the axis of the bobbin to perform the usual operations of depositing the thread in layers on the bobbin.

According to the invention, the yarn guide device is equipped with a dragging unit, for example a pinch-roll, which allows the translation of a section of yarn, forwards or backwards with respect to the yarn guide itself, during the start and end of winding phases. .

Furthermore, the yarn guiding device cooperates with blanking, folding and pinching units, arranged in cascade between the yarn guide and the reel and suitable for carrying out the operations of interrupting the yarn with respect to the feeding, shaping the tail end of the yarn and displacement of said end in correspondence with suitable retaining means present on the reel itself.

The blanking, folding and stapling groups together constitute the group for hooking the tail end of the wire onto the reel.

Said hooking unit is also equipped with suitable introducing means which intervene in the start-up phase of the winding.

According to the invention, in the phase of end of winding, said hooking unit can rotate from an exclusion position to a position for receiving and delivering the yarn in which the shearing, folding and pinching units are substantially aligned with the yarn guiding device. Furthermore, the pinching unit is equipped with an autonomous movement to transfer the tail of the thread onto the holding means present on the reel.

According to the invention, in the phase of end of winding, suitable contrast means are inserted between the thread being fed and the layers of thread already wound on the spool to form a section of thread separated from the spool itself, said section of thread being thus made suitable for taken by said pinching unit.

In a preferential embodiment of the invention, said contrast means is mounted on the rim means which rotate the reel itself.

At this point, the feeding of the yarn is stopped and the dragging unit associated with the yarn guide is operated, in the opposite direction to the winding direction, to drag back a desired length of yarn. This dragging of the yarn serves to form a buffer of yarn upstream of the yarn guide which is then used for the eventual withdrawal of a sample and for the automatic start-up of a new winding cycle.

In this position, the clamping unit is brought close to the contrast medium to hook said length of thread.

This allows the disengagement and evacuation of said contrast medium.

From this position, the cutting of the wire by the shear unit and the bending of the tail end by the bending unit can be performed, said shear and bender units being arranged upstream of the clamping unit and the yarn being held by said staple assembly.

According to the invention, vise means are integrally present on a flange of the reel, advantageously on the upper flange, having a first closing position on the flange itself and a second position elastically open and slightly spaced from said flange.

According to the invention, said clamp means have an actuation from the outside.

According to an advantageous embodiment of the invention, the opening of said clamp means is achieved by the means for centering the rim through the interposition of lever means.

Said center radius of the bridle, carried out substantially during the cutting and bending phase of the tail end of the thread, thus determines, with an action performed from the outside with respect to the automatic winding mechanism, the opening of said integral clamp means to the reel.

At this point, the clamping unit is operated to bring the curved end of the thread inside the clamp means present on the reel. Said clamp means are then closed on the flange of the reel, holding the tail of the wire and allowing the lowering of the reel on the support base and the eventual automatic evacuation.

Since when the bobbin is lowered the tail of the thread is already held solidly to it, any possibility of releasing the turns is avoided.

The completed reel is then replaced with an empty reel, possibly automatically.

At this point, according to the invention, the hooking unit translates vertically to align said thread tip introducing means to the thread guide device.

The means for introducing the tip of the wire consist substantially of a guide channel, suitable for assuming multiple working positions and equipped with deviation means, advantageously oscillating around the terminal end of said channel.

When the empty reel is ready for winding, the dragging unit associated with the guided device advances, in the winding direction and inside said guide channel, the section of wire previously obtained in the end of winding phase.

If a sample is to be taken, the guide channel assumes a position suitable for directing the wire towards the auxiliary cutting unit, in this case specifically designed for this operation. Once this sample has been taken, or immediately after the empty reel arrives, the channel is positioned so as to direct the wire moved by the drawing unit towards the upper flange of said empty reel.

When the tip of the wire has substantially reached the terminal end of the guide channel, the deviation means present at said end of the channel are operated to move the tip of the wire upwards.

Said tip of the thread thus cooperates with gripper means, advantageously mounted integrally on the rim, which close on the tip of the thread and retain it at least during the start-up phases of the winding.

Said gripper means are inserted between the spokes of the reel near the core of the reel.

When the tip of the wire is firmly held by said gripper means, the channel returns to a position away from the bobbin and winding is started.

ILLUSTRATION OF DRAWINGS

The attached figures are provided by way of non-limiting example and illustrate a preferential solution of the invention.

In the tables we have that:

- fig. 1 schematically shows a side view of a winding machine to which the method and device according to the invention are applied;

- fig. 2 shows partially, with a top view, the hooking unit, deprived for illustrative convenience of the introducing means of the tip of the thread, in the phase of end of winding;

- fig. 3 shows a side view of the coupling unit;

fig. 4 illustrates the operating steps of the wire tip introducing means in the winding start step;

fig. 5 is a top view of the yoke assembly according to the invention;

fig. 6 shows the section according to A-A of fig.

5;

fig. 7 shows the section according to B-B of fig.

5;

fig. 8 shows the section according to C-C of fig.

5, the rim centering assembly associated with the fixed structure of the winder being also schematically illustrated;

fig. 9 schematically shows a top view of the hooking of the wire tip;

fig. 10 shows the section according to A-A of fig.

9;

figs. 11 show, with a section according to B-B of fig. 9, the hooking of the tail of the thread.

DESCRIPTION OF THE DRAWINGS

The automatic winder 10 to which the automatic start and end of winding process is applied, is schematically illustrated in fig. 1, has a support and actuation unit for the reel 11 comprising tailstocks 12 and relative actuation members 13, rim means 14, a platform 15 and other units known in the art.

In particular, the platform 15 can be of the rotary type with three positions to provide an automatic mechanism for evacuating and replacing the coils 11 according to what is known from EP-A-0444311.

The yarn guiding device 17 consists of a movable unit, in this case vertically according to 18, to perform the deposition of superimposed layers of yarn 25 on the spool 11.

According to a variant, the translation movement of the yarn guide 17 is enslaved by an electronic control unit (not shown in the figures). Said electronic unit, by means of which the translation speed of the wire guide 17 is set at the start of winding as a function of the winding speed and the diameter of the wire 25, controls and adjusts said speed according to the detection of a possible variation of the angle of incidence of the wire 25 on the reel 11, calculated on a vertical plane with respect to a plane Said angle detection can be performed, for example, by inserting an oscillating element, for example a roller or an arm or other similar element, as an element of the guide 17 closest to coil 11.

According to a variant, optical sensor detection means can be used.

By associating suitable detection means, for example an encoder, to said oscillating element, it is possible to detect whether, as the winding proceeds and with reference to the direction of advancement of the guide 17, whether it is downward or upward, the angle of incidence of the thread 25 on the spool 11, calculated on the vertical plane with respect to a horizontal plane, remains constant or varies.

If, for example, said angle of incidence increases, the control unit intervenes in feedback to increase the translation speed of the guide 17 to obtain, in a certain sense, that the guide 17 "follows" the yarn 25 so that no overlaps of turns.

Conversely, if a decrease in the angle of incidence is detected, the control unit slows down the translation speed of the thread guide 17 to ensure the approaching of the coils.

This solution allows to control with extreme accuracy and precision the deposition of the layers of thread 25 on the reel 11, allowing to obtain layers having coils as close as possible to each other.

Said thread guiding device 17 substantially comprises at least one pair of inlet rollers, indicated with 26, possibly adjustable according to the diameter of the thread 25 being processed, at least one driving assembly 27, in this case of the pinch-roll type, and at least guide discs 53 to keep the thread 25 in guide as close as possible to the bobbin 11.

Between the yarn guide 17 and the reel 11 there is a hooking unit 16 comprising a plurality of operating units arranged in cascade and mutually aligned.

In particular, from the yarn guide 17 to the reel 11, there is a shearing unit 50, a folding unit 45 and a gripper unit 39, the structure and operation of which are substantially known in the art and whose operating cycles which concretize the end and start winding will be described in more detail below.

More specifically, said groups 45, 50 and 39 intervene at the end of winding phase to make the thread 25 cut off and the tail of the thread 25 hooked onto the full bobbin 11.

The hooking unit 16 is also equipped with wire introducing means 19, in this case arranged above said shearing units 50, bending 45 and pinching 39.

The introducing means 19 intervene, in this case by means of vertical translation of the whole hooking assembly 16, during the winding start phase and serve to direct the tip of the wire 25 in correspondence with the holding means associated with the empty reel 11.

Said introducing means 19 are, in this case, constituted by a guide channel 20 (figs. 3 and 4), rotating on a horizontal plane about a rotation axis 21 to move into the multiple working positions that it can assume.

Said guide channel 20 is equipped at the end with a deviation element 22 which can oscillate, by means of an actuation impressed by the actuator 23 according to the need for the cycle, around a pin 64.

Said oscillation causes the displacement of said deviation element 22 from a rest position 22a, substantially in continuation of said guide channel 20, to a working position 22b, inclined with respect to the guide channel 20 and partially indicated in fig. 3.

The bridle means 14 used in the method and in the device according to the invention, in addition to the usual function of driving the reel 11 in rotation during the winding step by means of the driving pin 63 (Fig. 6), comprise a plurality of operating units which they intervene in the phases of the start and end of the winding itself.

More specifically, a gripper element 24 is mounted on said rim means 14 (figs. 5 and 6) which, during the winding start-up phase, is lowered between the spokes 28 of the reel 11 in a position close to its core 29 to to hold, at least for the first stages of winding, the tip of the wire 25 (figs. 4, 9 and 10).

On said rim means 14 there is also mounted a contrast element 30 which, at the end of the winding phase, is lowered from an exclusion position 30a (indicated by dotted lines in Fig. 7) to an interference position 30b with the wire 25 being wound in a position close to the outer ring of the upper flange 31 of the coil 11. Said displacement is obtained by the actuator 54 which rotates said contrast element 30 around the pin 55.

Again, the bridle means 14 comprise lever means 48, which at the end of the winding and centering phase of the bridle 14 itself actuate the holding means 47 of the tail of the thread 25 present on the upper flange 31 of the reel 11 in the manner described in below (fig. 8)

The end and start cycle of winding according to the invention provides for the following succession of operating steps.

Substantially at the end of the winding phase, the contrast element 30 mounted on the bridle means 14 is lowered and brought into interference with the last stretch of wire 25 being wound.

In this phase, the contrast element 30 is located in a position corresponding to an ideal "0" point, that is to say in the precise point of cooperation between the coil 11 and the coupling unit 16 for the end of winding procedure as well as the start of the same.

The interference of said contrast element 30 results in the formation of a section of thread 25 slightly different from the rings 32 of thread (figs.

11) of the last layer wound on the coil 11.

After a rotation of the reel 11 and of the contrast element 30 present on the rim 14, with respect to said point "0", sufficient for the formation of the desired yarn buffer 25, the upstream feeding is interrupted.

The dragging assembly 27 intervenes on the wire 25 to translate said portion of wire 25 backwards, i.e. in the opposite direction to the winding direction, with consequent rotation in the reverse direction of the reel 11.

The rearward dragging of the wire 25 forms a buffer of wire 25 which is necessary both for the subsequent procedure for starting the winding and for the possible procedure for taking a sample, carried out in the manner described below.

At this point, the coupling unit 16, which was in its non-working position 16a, partially indicated in fig. 2, is rotated around the rotation axis 34 to move to the working position 16b, ie with the shear 50, bending 45 and clamping units 39 substantially aligned with the thread guide 17.

Said rotation of the coupling group 16 is performed, in this case, by activating the actuator means 35 whose stem 36 is fixed to the fixed point 37 of the coupling group 16.

The gripper unit 39 has its own gripper means 38 equipped with an actuation to close and clamp the wire 25.

The rotation of the hooking group 16 brings said pincer means 38 inside the cavity defined by the contrast element 30 where the wire 25 is present.

The gripper means 38, in the gripping position 38a, at this point close on the wire 25 and hold it in position, thus allowing the eventual release and evacuation, for example by moving upwards and returning to its rest position contrast element 30.

The wire 25 is in this position, held by the gripper means 38, substantially in correspondence with the upper flange 31 of the bobbin 11 and slightly away from the rings 32 already wound.

Furthermore, upstream of the gripper means 38, the thread is. located within the shear groups 50 and dr bending 45.

Said groups, shear 50 and bending 45, can at this point intervene on wire 25.

In particular, the shear assembly 50, by operating the shears 40, cuts the wire 25 in correspondence with the cutting axis 41 (Fig. 3).

The bending unit 45, by rotating its bending roller 42 around its fixed contrast roller 43, determines the shaping of the sheared end of the wire 25 and its hedgehog shape 44 (Figs. 11).

At this point, the gripper means 38, which always hold the wire 25, are made to rotate around the pin 46 from position 38a to the position indicated by 38b, by actuating the actuator 47 (fig. 2), therefore the whole hooking assembly 16 translates upwards to bring the loop 44 in proximity to the holding means present in correspondence with the upper flange 31 of the spool 11.

According to the invention, said holding means consist of a blade 47 (figs. 8 and 11), integral with the upper flange 31 of the reel 11 and operated, in this case, from the outside.

Said actuation from the outside is obtained, by means of lever means 48 present on the rim 14, by the centering means 56 of the rim 14, said centering means 56 being mounted on the fixed structure 33 of the spooler 10.

The centering of the yoke 14 is performed by a cone-shaped element 57 which is rotated by the actuator 58 around the pin 59 and inserted inside a slot 60 (fig. 8), thus realizing the centering.

The centering of the rim 14 automatically determines, due to the thrust of said cone-shaped element 57 on the lever means 48, the opening of the vane 47 in the position 47a away from the outer ring of said upper flange 31 (figs. 8 and 11a) .

The gripper means 38 then carry the loop 44 inside said blade 47, which is then closed on the flange 31, for the upward displacement of the cone-shaped element 57 of the rim centering means 56.

The lever 48 is recalled by the spring means 61 and the vane 47 moves into the closed position 47a by the return action of the spring means present inside the cylinder 65 integral with the flange 31, thus holding the end of the thread 25.

The displacement of the blade 47 in its two positions, 47a and 47b, thus occurs purely mechanically.

At this point, the completed reel 11 can be lowered onto the platform 15, evacuated and possibly replaced by an empty reel 11.

The hooking assembly 16 then translates vertically, with a stroke equal to "1" (fig. 3), to align the introducer assembly 19 comprising the guide channel 20 with the wire guide 17.

In this phase, the guide channel 20 is in the position indicated with 20a in fig. 4.

The dragging unit 27 is operated to translate forwards, inside said channel 20, a desired length of wire 25.

If a sample is to be taken, the channel 20 is rotated around the pin 21 in the position indicated by 20b (fig. 4). A desired length of wire 25 is made to advance by the drawing assembly 27 beyond a shear assembly 49, movable linearly on a bench 51 and specifically designed for this operation.

At the end of the withdrawal phase, the channel 20 is rotated in the position indicated with 20c and turned in the direction of the reel 11.

When the tip of the wire 25 has substantially reached the end of the channel 20, the diverter element 22 is operated, which is brought to the position indicated with 22b.

This actuation serves to lift the tip of the wire and introduce it inside the gripper means 24 mounted on the yoke 14 and previously lowered in the middle of the spokes 28 of the upper flange 31.

At this point the movable jaw 52a of the gripper means 24, operated by the actuator 62, closes on the fixed jaw 52b, retaining the tip of the wire 25.

Then, the channel 20 is evacuated by lowering and moved to the exclusion position and the winding can be started.

After a few turns of winding, that is, having completed the winding on the reel 11, the gripper means 24 can release said tip of the wire 25 and disengage with respect to the reel 11, for example by moving it upwards.

Claims (1)

CLAIMS 1 - Procedure for the automatic start and end of winding of metal wire (25) on a reel (11), said wire (25) having a diameter up to 14-16 mm, said procedure being applied to a winder (10 ) comprising at least bridle means (14) for dragging the reel (11) and at least yarn guide means (17) for feeding and guiding the yarn (25), said yarn guide means (17) being movable parallel to the axis of the reel ( 11) for depositing the thread (25) in layers on the spool (11), said winder (10) further comprising at least means for cutting (50) the end of the thread (25), means for shaping (45) the end of the wire (25) and means for gripping and moving (39) said shaped end, said means (50, 45, 39) being arranged in an aligned manner and forming part of a hooking assembly (16), characterized in that, in at the end of the winding phase, a suitable contrast agent (30) is interposed between the winding wire (25) and the reel (11) to form a section of yarn accessible to the socket, then, with the upstream feeding interrupted, a desired section of yarn is dragged backwards upstream of the yarn guide (17) to form a desired yarn buffer, hooking unit (16 ), integrated by introducing means (19) of the tip of the thread (25), is then aligned with the guide means (17) and carries out in sequence the operations of pinching, shearing and folding of the ends of the thread (25) , subsequently the gripping means (39) move the curved end of the tail of the thread in correspondence with anchoring means, shaped like holding means (47) of the tail, said holding means (47) then block the tail of the thread on the bobbin (11), said full bobbin (11) is then evacuated and replaced with an empty bobbin (11) while the hooking unit (16) translates and aligns said introducer means (19) to said thread guide means (17), the thread it is then advanced by said guide means f ilo (17) in cooperation with said introducing means (19) which send said tip of the thread (25) in correspondence with the retaining means (24) of the tip of the thread (25), said holding means (24) being present in the rim (14) and cooperating with a flange (31) of the coil (11). 2 - Process as in Claim 1, characterized in that the holding means (47) of the thread tail (25) are integral with the bobbin (11). 3 - Process as claimed in Claim 1 or 2, characterized in that the holding means (47) of the thread tail (25) are operated from the outside. 4 - Process according to one or the other of the preceding claims, characterized in that between the end of winding phase and the start of winding phase there is a phase for taking a sample of yarn (25). 5 - Process according to Claim 4, characterized in that the step of taking a sample is carried out by positioning the introducing means (19) of the head of the wire in an aligned position (20b) with a sample shearing unit (49). 6 - Device for the automatic start and end of winding of metal wire (25) on a reel (11), said wire (25) having a diameter up to 14-16 mm, said device being associated with a winder (10 ) comprising at least bridle means (14) for dragging the reel (11) and at least yarn guide means (17) for feeding and guiding the yarn (25), said yarn guide means (17) being movable parallel to the axis of the reel ( 11) for depositing the thread (25) in layers on the spool (11), said winder (10) further comprising at least means for cutting (50) the end of the thread (25), means for shaping (45) the end of the wire (25) and means for gripping and moving (39) said shaped end, said means (50, 45, 39) being arranged in an aligned way and forming part of a hooking group (16), characterized in that the group (16) also comprises introducing means (19) for the tip of the wire (25), said hooking unit (16) has a first exclusion position (16a), a second position (16b) in which the means for shearing (50), the means for shaping (45) and the means for gripping and moving (39) the shaped end of the thread are aligned with the thread guide means (17) and a third position in which the introducing means (19) are aligned with the thread guide means (17), the means for gripping and moving (39) the end of the thread presenting, in the second position ( 16b) of the coupling unit (16), a first gripping position (38a) and a second delivery position (38b, fig. 2), said first gripping position (38a) cooperating with a contrast medium (30) and removal of the thread (25) from the reel (11), said second delivery position (38b) cooperating with the retaining means (47) of the 'tail of the yarn (25), said introducing means (19), in the third position of the hooking unit (16), presenting at least a first yarn receiving position (20a, fig. 4) and a second yarn delivery position <20c ), said second yarn delivery position (20c) cooperating with the retaining means (24) of the yarn tip. 7 - Device as claimed in Claim 6, characterized in that the contrast medium (30) is mounted on the rim (14) and has at least a first exclusion position (30a) and at least a second interference position with the wire (30b, fig. 7). 8 - Device as claimed in one or the other of the preceding claims from 6 onwards, characterized in that the holding means (47) of the thread tail (25) have a first position for receiving thread (47a) and a second position thread retention (47b, fig. 11), said second thread retention position (47b) cooperating with a flange (31) of the spool (11). 9 - Device as claimed in one or the other of the preceding claims from 6 onwards, characterized in that the positions for receiving (47a) and holding (47b) of the means for retaining (47) the tail of the yarn (25) are enslaved to the centering means (56) of the rim (14) associated with the fixed structure (33) of the winder (10) (fig. 8). 10 - Device as claimed in either of Claims 6 onwards, characterized in that the centering means (56) of the yoke (14) comprise a cone-shaped element (57) cooperating with a centering slot (60 ) present on the yoke (14), said cone-shaped element (57) being temporally associated with the tail holding means (47) for the interposition of lever means (48) present on the yoke (14). 11 - Device according to one or the other of the preceding claims from 6 onwards, characterized in that the introducing means (19) of the tip of the wire (25) have a third sampling position (20b) cooperating with a sampling shear (49). 12 - Device according to one or the other of the preceding claims from 6 onwards, characterized in that the introducing means (19) have a deflection element (22) having a first non-interference position (22a) with the wire ( 25) and a second deviation position (22b) tip of the thread (25) (fig. 3). 13 - Device as claimed in Claim 12, characterized in that the second deflection position (22b) cooperates with the retaining means (24) of the tip of the thread (25). 14 - Device as claimed in one or the other of the preceding claims from 6 onwards, characterized in that the means for retaining the tip of the thread (24) are mounted on the rim (14). 15 - Device as claimed in one or the other of the preceding claims from 6 onwards, characterized in that the thread guide means (17) are associated with forward-reverse movement means for distributing the thread (25) on the spool (11 ) and are enslaved to an electronic control unit associated with means for detecting the angle of incidence of the thread (25) on the spool (11) in relation to the direction of advancement of the said thread guide (17), said electronic unit having means which they regulate in feedback the translation speed of the wire guide handling means (17).