HK40001761B - Intermingling device and relative method - Google Patents

Description

Interlacing device and related method

Technical Field

The present invention relates to a yarn connecting device for the textile industry, and a method based on its operation, the device preferably being arranged upstream of a textile machine.

Background Art

In the textile industry, the use of so-called interlacers is known, which have the task of connecting two or more threads or filaments in order to produce a single yarn for feeding a textile machine or for winding on a bobbin-to-bobbin winder.

The joining of two or more threads can be carried out according to various techniques, depending on whether a warp-entangled yarn, a twisted yarn or a cabochoned yarn has to be obtained, as will now be explained.

Intertwined yarns consist of multiple threads or filaments connected at randomly distributed intertwining points along the yarn itself.

Entanglement is usually achieved by passing the threads or filaments through turbulent air jets; the jets cause the threads or filaments to become entangled and form the random entanglement points mentioned above.

The purpose of this technical solution is to be able to connect different kinds of threads or cocoon silks, such as threads made of synthetic materials, elastic threads, cotton threads, wool threads, acrylic threads, etc., to obtain single yarns with mechanical and aesthetic characteristics different from those of single yarns composed only of basic cocoon silks or threads.

Interlaced yarns are particularly popular in the production of knitwear and hosiery, where over the past few years there has been a trend to use interlacing technology to combine baseline yarns with elastic yarns, which give the knitwear or hosiery its special stretchiness.

EP 1151159 describes an interlacing device that can be fed with two or more base yarns and, in turn, feeds the interlaced yarns to circular or flat looms for the production of fabrics, knitwear, hosiery, and the like. The base yarns are conveyed and moved forward near a nozzle, from which a jet of compressed air emerges. As the yarns travel in front of the nozzle, the jet is strong enough to connect the yarns at the interlacing point. The resulting interlaced yarns are accumulated on a winding drum and are then pulled from the drum by a textile machine located downstream of the interlacing device.

The device also includes an electric motor and a corresponding control unit. The following components are key-connected to the electric motor:

-Rollers that rotate the elastomer roll;

- rollers that rotate the drum of one or more base wires to unwind the wire;

- Accumulation drums for accumulating warp entangled yarns for use in textile machines or bobbin-to-bobbin winders.

The difference in diameter between the rollers feeding the elastic thread and the rollers feeding the base yarn allows the elastic thread to be stretched, thereby imparting the desired elastic characteristics to the warp interlaced yarn. The same result can be achieved by providing two motors, one for unwinding the reel of elastomeric thread and another electric motor for unwinding the additional base yarn.

It must be taken into account that the drum does not slip relative to the corresponding roller, but the rotation is given only by the roller without relative sliding with the drum. In fact, when calculating the inertia of the electric motor, this requires adding the mass of the drum to the mass of the shaft of the electric motor and the mass of the roller.

The device described in document EP 1151159 has drawbacks due to its use with textile machines that are intermittently supplied with interlaced yarn, such as in the case of machines for producing socks. When the number of turns of interlaced yarn on the accumulation drum is sufficient to satisfy the needs of the downstream textile machine, the control unit keeps the electric motor in standby mode, i.e. inactive; in this case, the base wires are stationary, that is, they do not move longitudinally in front of the nozzle.

However, the electric motor does not always stop within the expected timeframe; this is primarily due to the inertia of the drum, which is rotated by the roller keyed to the motor shaft. For example, a drum with a diameter of approximately 15 or 16 cm and an initial weight (for a new drum) of between 700 grams and 1 kilogram is rotated by the roller at approximately 4,500 rpm. As the line is unwound from the drum, the weight and diameter of the drum itself decrease, and therefore the time required to bring the drum, the corresponding roller, and the motor shaft to a complete stop also varies.

A person skilled in the art will certainly appreciate that as the drum changes size and weight, the time it takes to stop the drum and, therefore, the time it takes to start rotating to nominal speed will change significantly as the line is unwound. In other words, as the drum becomes lighter, the electric motor decelerates faster and faster until it comes to a complete stop; and as the drum becomes lighter, restarting from a stopped state becomes faster.

Therefore, as the inertia of the bobbins and, consequently, that of the electric motors of the interlacers changes, the user's adjustments regarding stopping and restarting the compressed air supply to the nozzles may not always be optimal, i.e., appropriate. For example, the compressed air may be stopped with such an excessive delay that uneven interlacing occurs; on the other hand, if a spent bobbin is replaced by a new and heavier one, the compressed air jet may be shut off during the first stop before the thread has completely come to rest, thus resulting in uninterlaced yarn lengths.

When the number of turns of the interlaced yarn on the accumulating drum decreases and exceeds a threshold value deemed insufficient to meet the requirements of the downstream textile machine, the control unit controls the activation of the electric motor and the interlacing device resumes the interlacing operation of the base yarns, which are again driven in front of the nozzles. Also in this case, when the bobbin is already loaded, if the weight and diameter of the bobbin have changed relative to the initial values, the recovery time of the compressed air jet may not be optimal with respect to the time required by the electric motor to return the interlacing to nominal speed when the bobbin is replaced and after restarting from a standstill.

Suitable sensors detect the number of turns of the interlaced yarn on the accumulating drum and send a corresponding signal to the control unit.

In practice, the interlacing device described in document EP 1151159 is subjected to a continuous cycle of starts and stops, the order and duration of which depend on the amount of interlaced yarn accumulated on the drum, which in turn depends on the requirements of the textile machine downstream of the interlacing device itself. However, at any given time, the supply of compressed air to the nozzles is independent of the effective movement of the shaft of the electric motor, and this involves irregularities in the interlacing of the fibers, which are not affected by any air jet and may therefore contain sections of uninterlaced yarn.

The reason is that the intertwining of the baseline must be ensured in the whole range of the warp intertwined yarn, i.e. there can be no unintertwined yarn section. In an enterprise, the quantity of the intertwining devices supplied with compressed air can be very large, about dozens or hundreds, simultaneously.

Furthermore, if the compressed air jet strikes the same length of thread for a long time, it may cause one or more threads to break, or may cause defects in the warp-entangled yarn. If the base thread is particularly thin (e.g., less than 8 denier), the base thread may even break.

EP-A-0 685 581 describes another solution according to the prior art.

Summary of the Invention

The object of the present invention is to provide an interlacing device and method which solve the drawbacks of traditional solutions, allowing to obtain high-quality warp interlaced yarns and at the same time minimizing the costs related to the use of compressed air.

Therefore, in a first aspect the present invention relates to a method for interlacing two or more base yarns to obtain warp interlaced yarns from the two or more base yarns.

In particular, the method comprises the following steps:

a) driving the base yarns close to a nozzle supplying compressed air to achieve interlacing, and accumulating the interlaced yarns thus obtained in a winding on an accumulating drum;

b) detecting the amount of intertwined yarn accumulated on the drum, for example by detecting the number of turns of the yarn, and

c) terminating step a) by stopping the baseline when the amount of intertwined yarn detected in step b) exceeds a threshold value, and

d) restarting step a) when the amount of the intertwined yarns detected in step b) is below the threshold value.

The above steps can be performed, for example, by an intermittently driven interlacing device, as often happens in situations where the device has to supply the interlaced yarn to a textile machine which in turn is subject to continuous starts and stops, as in the case of machines for making socks.

Unlike the solutions used hitherto, the method according to the invention provides an additional step, the purpose of which is to avoid the waste of compressed air or the production of low-quality warp entangled yarns by improving the quality standard of the warp entangled yarns.

The additional steps are:

e) detecting the speed of the driven baseline, or detecting whether the baseline is moving,

f) closing the supply of compressed air to the nozzle simultaneously with step c) or with a delay compared to step c), or even simultaneously with or after the baseline stops, and

g) restarting the supply of compressed air to the nozzle before or simultaneously with step d), or even before or simultaneously with the time of restarting the longitudinal movement relative to said baseline,

Steps f) and g) are feedback performed based on the detected baseline speed or depending on whether movement of the baseline is detected (for step f the baseline is stationary, for step g the baseline is moving).

It may be convenient to emphasize that step e) of detecting the baseline velocity can be performed automatically in two modes: by direct measurement or indirect measurement.

In a first mode, the speed of at least one of the baselines is detected by means of one or more sensors, such as motion sensors, which detect the instantaneous speed of the at least one baseline at a sufficiently high sampling frequency (e.g. calculated using the Nyquist theorem and taking into account the maximum speed that the yarn can reach).

In the second mode, the rotation speed of at least one reel from which the baseline is drawn is detected. The instantaneous speed can be detected by a suitable sensor, such as an encoder, by detecting the number of revolutions of the roller rotating the reel or the number of revolutions of the motor shaft of the electric motor rotating the roller.

For example, the movement of the base line can be detected by appropriate motion sensors used in the textile field.

Preferably, the time gap described in steps f) and g), ie the time between the actual stop or the actual start of the baseline - at which the actual start is detected - and the delay or advance amount, can be adjusted by the user.

Once the adjustment has been set, the interlacing device automatically performs steps f) and g) as a function of this adjustment, whether it is dependent on the actual movement of the base line or on the detection of the actual speed.

In practice, stopping the compressed air jet is only a matter of concern after the baseline has stopped, so that the compressed air is not wasted and lengths of uninterwoven yarn do not accumulate on the accumulation drum. This is in fact a risk associated with shutting off the compressed air supply before the baseline has stopped. Existing technology provides for regulating the time of excess air delivery relative to the power shutoff to prevent uninterwoven lengths. Thus, the potential savings in annual electricity consumption for industrial compressors used in medium-sized production units—those with dozens or hundreds of simultaneously operating interlacing devices—can be quantified in the thousands of euros.

Steps f) and g) can be achieved by providing the interlacing device with a compressed air on/off valve or equivalent device controlled by a control unit.

The possibility of adjusting the time gap associated with the shut-off and re-establishment of the compressed air jet allows obtaining maximum compatibility with production processes requiring interlaced yarns, so that changes in the inertia of the thread drum during production as the drum is used up are irrelevant to the outcome.

Preferably, at least one of steps c) and d)—and preferably both—is performed by gradually slowing down and accelerating the baseline, respectively. More specifically, the deceleration and/or acceleration of the baseline follows corresponding deceleration and acceleration slopes in a Cartesian plane having a time abscissa and a frequency ordinate. As described above, the actual inertia of the spool is taken into account, i.e., the stopping of the line is not automatically assumed to occur within an assumed time. Instead, the actual speed of the line is measured, or the movement of the line is detected directly or indirectly in some other way to determine whether it has actually stopped or started.

Preferably, step f) is performed with a delay of 0 to 500 milliseconds relative to step c).

Preferably, step g) is performed with an advance of 0 to 500 milliseconds relative to step d).

A second aspect of the present invention relates to an interlacing device.

In particular, the interlacing device comprises at least one electric motor, a roller (or rollers) that are rotated by the electric motor, for example, and a accumulating drum that is keyed to the motor's shaft. The rollers are responsible for rotating the reels of base yarn to achieve the desired unwinding speed, while the accumulating drum is responsible for receiving the windings of the interlaced yarn. In practice, the accumulating drum acts as a "reserve" for the interlaced yarn, allowing for efficient supply to downstream machines.

The device includes nozzles oriented to cut through the path of the base yarn, along with corresponding compressed air supply lines. The base yarn is brought close to the nozzles so that it is struck by corresponding jets of compressed air, thereby inducing entanglement. The nozzles are then arranged along the path, with the base yarn traveling between the corresponding reel and the accumulation drum.

The interlacing device further includes a sensor that directly or indirectly detects the number of turns of the interlaced yarn on the accumulating drum. A control unit of the interlacing device includes a program mechanism (e.g., an electric circuit) and is programmed to feedback-drive the start and stop of the electric motor based on the number of turns of the yarn detected by the sensor.

The frequency of detection of the yarn windings by a suitable sensor is adjustable; for example, sampling can be performed 10 times per second.

Advantageously, the interlacing device according to the present invention differs from the prior art in that it includes a detection mechanism and a cutting mechanism, wherein the detection mechanism is used to detect the speed or movement of one or more base lines, and the cutting mechanism is used to cut off the compressed air. The control unit controls according to the following two modes:

f) actual stopping relative to the baseline, with simultaneous or delayed shut-off of the compressed air supply to the nozzle, and

g) The time at which the movement is actually restarted relative to the baseline, simultaneously with or in advance of restarting the supply of compressed air to the nozzle.

The actual baseline speed can be detected in two modes. In a first embodiment, the device includes at least one sensor, such as a motion sensor, which directly detects the speed at which the at least one baseline is traveling. In a second embodiment, the device includes at least one sensor that detects the rotational speed of at least one roller rotating the baseline drum or the rotational speed of the shaft of the electric motor to which the roller is mounted.

It is possible to detect whether the baseline is moving by using a motion sensor.

This solution offers the same advantages as described above in connection with this method.In practice, the interlacing device operates automatically and independently by adapting to the variable inertia value of the base drum, ie it is an adaptive device.

Preferably, the timing advance and delay can be adjusted by the user by means of the control unit, more preferably between 0 milliseconds and 500 milliseconds.

In a preferred embodiment, the shut-off mechanism comprises at least one valve, for example an electric valve, which is positioned along the supply line of compressed air upstream of the nozzle with respect to the air flow.

Preferably, the control unit allows adjustment of the delay duration and/or the lead duration for shutting off or restarting the compressed air supply, respectively. For example, the delay can be set between 0 milliseconds and 500 milliseconds relative to baseline operation and/or the actual stopping of the electric motor (detected by one or more sensors).

For example, the activation of the shut-off mechanism for shutting off the compressed air jet can be achieved using the following five modes.

In the first mode, the control unit performs feedback control on the compressed air cutting mechanism based on the number of yarn turns detected by a sensor specially installed on the interlacing device. As mentioned above, the cutting mechanism is respectively actuated in advance or in delay relative to the start and stop of the electric motor.

In the second mode, the interlacing device includes an encoder or speed sensor disposed on the shaft of the electric motor to detect its rotational speed. The control unit provides feedback control over the compressed air shutoff mechanism based on the detected rotational speed. For example, the control unit can be programmed to shut off the compressed air flow when the shaft of the electric motor is completely inoperative. For example, if a stationary electric motor draws a 5Hz current, this value can serve as a minimum threshold below which the motor is deemed inoperative.

In the third mode, the interlacing device includes a permanent magnet mounted on the accumulating drum and a Hall effect sensor positioned close to the drum itself to detect its rotational speed based on the well-known Hall effect principle. A control unit provides feedback control of the compressed air shut-off mechanism based on the rotational speed detected by the Hall effect sensor connected to the control unit. Because the drum is connected to the shaft of an electric motor, the proposed solution indirectly measures the motor's unique rotational speed.

In a fourth mode, the interlacing device includes a motion sensor configured to detect movement of the corresponding base yarn and/or the interlaced yarn. The control unit provides feedback control of the compressed air shutoff mechanism based on signals generated by the motion sensor. For example, the control unit can be programmed to shut off the compressed air flow when the base yarn is completely stationary.

In the fifth mode, the interlacing device includes a circuit for detecting the frequency of the signal sent by the control unit to the electric motor and the current drawn by the electric motor. This allows a comparison to be made. Based on this comparison, the control unit performs feedback control of the compressed air shut-off mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS

Other characteristics and advantages of the present invention will become more apparent on reading the following description of a preferred but non-exclusive embodiment, described for purposes of illustration only and not limitation, with the aid of the accompanying drawings, in which:

- Figure 1 is a schematic perspective view of a first embodiment of an interlacing device according to the invention;

- Figure 2 is a schematic diagram of a second embodiment of an interlacing device according to the present invention;

- Figure 3 is a schematic diagram of a third embodiment of an interlacing device according to the present invention;

- Figure 4 is a schematic diagram of a fourth embodiment of an interlacing device according to the present invention;

- Figure 5 is a frequency-time diagram related to the method according to the invention.

DETAILED DESCRIPTION

The following detailed description relates to an interlacing device 1 according to a first embodiment of the present invention. All components are mounted on the main body 1' of the device 1. Respective base yarns 4 and 5, for example, nylon base yarn 4 and elastomer base yarn 5, are drawn from two reels 2 and 3 and conveniently guided by yarn guides located near a nozzle 6, which is supplied with compressed air via an external line (not visible). As previously described, the jet of compressed air emitted from the nozzle 6 impinges on the base yarns 4 and 5 as they move in front of the nozzle itself, causing them to connect at a plurality of interlacing points randomly distributed along their lengths. Thus, downstream of the nozzle 6, in the direction of movement of the base yarns 4 and 5, a single interlaced warp yarn 7 is obtained. This interlaced warp yarn 7 is wound into a winding 8 on an accumulation drum 9. If necessary for the production cycle, the textile machine fed with the interlaced warp yarn 7 produced by the interlacing device 1 withdraws a portion 10 of the interlaced warp yarn from the accumulation drum 9, thereby reducing the number of windings 8 accumulated thereon.

A suitable sensor 11 detects the number of turns of the yarn 8 on the accumulation drum 9 with an adjustable sampling frequency (for example from 1 to 100 times per second).

An electronic control unit ECU provided with a program is also installed in the main body 1 ′ of the device 1 , and controls the functions of the device itself as described below.

Along the supply line of compressed air, an electric valve (not shown) is provided upstream of the nozzle 6 in terms of the flow direction. The electric valve is driven by the control unit ECU.

Also included in the main body 1' is an electric motor M designed to be controlled by an ECU unit. Specifically, the ECU unit activates and deactivates the electric motor M based on the number of turns of the yarn 8 on the accumulating drum 9, thereby ensuring a constant supply of warp interlaced yarn 7 to the textile machine downstream of the device 1. This ensures that the warp interlaced yarn 7 is never lacking, which would otherwise cause downtime for the textile machine.

In this first embodiment, the control unit ECU receives and processes the signal generated by the sensor 11 (which can be, for example, an optical sensor) and operates as described above, taking into account a predetermined or adjustable threshold value of the number of turns of the winding yarn 8, below which the electric motor M is restarted and above which the electric motor M is stopped.

In practice, rollers 12 and 13, or roller wheels, and accumulating drum 9 are coupled to the shaft of electric motor M. Roller 12 rotates reel 3, causing base yarn 5 to unwind, while base yarn 4 is wound around roller 13 to form a winding. Because rollers 12 and 13 have different diameters, base yarns 4 and 5 are pulled at different tensions to achieve the desired stretch. The same result can be achieved by using two motors or by installing rollers 12 and 13 of the same diameter but rotating at different speeds (e.g., by using a reduction gear/speed reducer on one of the two rollers 12 or 13).

If one of the two base lines 4 or 5 is not pulled out, one of the rollers 12 or 13 can be eliminated or not installed.

The accumulation drum 9 is preferably enclosed in a conical bell 14 that rotates integrally with the drum 9 itself. The bell 14 is provided with a yarn guide bushing from which a portion 10 of the interlaced yarn 7 emerges, at the axis of rotation of the bell itself and of the electric motor M. The bell 14 is preferably removably constrained to the accumulation drum 9 by means of magnets.

The device 1 differs from conventional solutions in that the compressed air supply to the nozzle 6 is not continuous, but is shut off and restarted in a controlled manner dependent on the actual travel of the yarn.

The device includes at least one of sensors S1, S2, S3, or S4. For example, sensor S1 is a motion sensor that detects the instantaneous speed of baseline 4, sensor S2 is a motion sensor that detects the instantaneous speed of baseline 5, sensor S3 is an encoder that detects the number of revolutions of roller 12, and sensor S4 is an encoder that detects the number of revolutions of the shaft of electric motor M. Sensors S1-S4 are connected to the control unit ECU and transmit electrical signals representing the detected speeds to the control unit ECU.

By way of example, the sensors S1 and S2 may be motion sensors of the type sold by the company BTSR (www.btsr.com). Such sensors may also function as a mechanism for stopping the interlacer in the event of a yarn breakage.

With reference to Figure 5, a frequency-time diagram is shown to help understand the concept just described. The sensor 11 is designed to send a binary signal to the control unit ECU; the signal can change between an ON state (when the number of turns of the yarn 8 on the drum 9 is low) and an OFF state (when the number of turns of the yarn 8 on the drum 9 is sufficient).

For example, let's consider a situation where the electric motor M is not running and the nozzle 6 is not being fed. As time passes (on the abscissa), at some point the sensor 11 generates an ON signal (on the ordinate) because the sensor detects that the number of turns of the interlaced yarn 7 on the accumulation drum 9 has fallen below a threshold. The control unit ECU opens the electric valve with an advance t' of 50 to 500 milliseconds relative to the time of sending the start signal to the electric motor M to restart the compressed air flow to the nozzle 6. The electric motor M then starts and accelerates to its nominal speed under steady-state conditions.

As long as the electric motor M is running, the device 1 interlaces the base yarns 4 and 5, and the resulting interwoven warp yarn 7 accumulates on the accumulation drum 9, forming the yarn windings 8. At some point, the sensor 11 detects that the number of yarn windings 8 wound on the accumulation drum 9 exceeds a predetermined threshold and generates an OFF signal. The control unit ECU immediately shuts off the electric motor M, which then decelerates and comes to a complete stop. Following the stop of the electric motor M, the control unit ECU closes the electric valve with a delay t" ranging from 50 to 500 milliseconds, thereby shutting off the compressed air flow to the nozzle 6.

In the examples shown in Figures 1 and 5, when the control unit ECU stops the motor, the motor decelerates along a deceleration ramp that lasts approximately 0.8 seconds. Motor M is equipped with an inverter. When the output frequency is lower than 3 Hz, direct current is supplied to the two phases of the electric motor M for approximately 0.5 seconds via the inverter, commanded by the control unit ECU, bringing the motor M to a complete stop.

As mentioned above, in order to avoid that the inertia of a large reel such as reel 3 drives the roller 12 and subsequently the shaft of the electric motor M for longer than necessary, thereby defeating the programming of the control unit ECU, the control unit ECU automatically adapts its operation based on the signals received from the sensors among the sensors S1-S4.

Preferably, the time advance amount t' and the time delay amount t" can be programmed and set in the control unit ECU.

As can be seen from an inspection of FIG5 , a shadow time (e.g. 2 seconds) can be programmed, during which the control unit does not intervene in the electric motor M, even if the sensor 11 changes its signal. This serves to avoid shutting off the compressed air supply to the nozzle 6 when the shut-off and subsequent restart of the electric motor M are close in time (e.g. so close that the electric motor M does not have time to come to a complete stop before it restarts).

2-4 only schematically show respective embodiments of the interlacing device 1 according to the invention.

In the example shown in FIG2 , a rotary encoder 15 or speed sensor is combined with an electric motor M (not shown for simplicity) and detects the number of revolutions of the shaft of the electric motor M. For example, the encoder has a resolution of 50/100/200/500/1000 pls/revolution and is positioned directly on the shaft of the electric motor M. As described above in conjunction with the first embodiment, the control unit ECU obtains the signal provided by the encoder 15 to drive the electric motor itself and the electric valve.

FIG3 shows an alternative embodiment in which the number of revolutions of the electric motor M is detected using a Hall sensor 16 and a plurality of permanent magnets 17 mounted on the accumulating drum 9 or the corresponding bell jar 14 or on the rollers 12 or 13. When the interlacing device 1 is in operation, the Hall sensor 16 detects the passage of the permanent magnets 17 and sends a corresponding signal to the control unit ECU. The control unit ECU processes the signal provided by the Hall sensor 16 to drive the electric motor M itself and the electric valve, as described above in conjunction with the first embodiment.

FIG4 illustrates an alternative embodiment in which the number of revolutions of the electric motor M is detected using an optical sensor 18 positioned along the path of the base yarns 4 and 5. When the interlacing device 1 is in operation, the optical sensor 18 sends corresponding signals to the control unit ECU, indicating the presence and movement of the base yarns 4 and 5. The control unit ECU processes these signals to drive the electric motor M itself and the electric valve, as described above in connection with the first embodiment. Alternatively, the optical sensor 18 can be positioned along the path of the interlaced yarns 7 to detect their movement.

Claims (16)

1. A method for intertwining two or more baselines (4, 5), comprising the following steps: a) Drive the baseline (4, 5) close to the nozzle (6), supply compressed air to the nozzle to achieve interlacing, thereby forming an interlaced yarn (7), and accumulate the interlaced yarn (7) in the winding (8) on the accumulation roller (9); b) Detect the amount of interlaced yarn (7) accumulated on the roller (9), and c) When the amount of interlaced yarn (7) detected in step b) exceeds the threshold, step a) is terminated by stopping the baseline (4, 5), and d) When the amount of interlaced yarn (7) detected in step b) is lower than the threshold, restart step a). Its characteristics include the following steps: e) Detect the speed of the baselines (4, 5) or detect whether the baselines (4, 5) are moving. f) Simultaneously with or with a time delay (t”) shut off the compressed air supply to the nozzle (6) relative to step c), and g) Restart the compressed air supply to the nozzle (6) simultaneously or with a time advance (t') relative to step d), Steps f) and g) are feedback based on the detected speed of the baseline or on whether the baseline is stationary or moving, respectively, to avoid wasting compressed air and the jet impacting the same part of the baseline (4, 5) for too long, or the jet shutting off too early, resulting in unentangled parts of the yarn. 2. The method according to claim 1, wherein the time delay and/or time advance in steps f) and g) are adjustable. 3. The method according to claim 1 or 2, wherein at least one of steps c) and d) is performed by providing a gradual deceleration and acceleration of the baseline (4, 5), respectively. 4. The method according to claim 3, wherein the deceleration and/or acceleration of the baselines (4, 5) follow corresponding deceleration ramps and acceleration ramps. 5. The method of claim 2, wherein step f) is performed with a time delay of 0 milliseconds to 500 milliseconds relative to step c) and/or Step g) is executed with a time lead of 0 to 500 milliseconds relative to step d). 6. The method according to claim 1 or 2, wherein both steps c) and d) are performed by providing a gradual deceleration and acceleration of the baseline (4, 5), respectively. 7. An entanglement device (1), It includes at least one electric motor (M), and at least one roller (12, 13) and an accumulation roller (9), both rotating under the action of the electric motor (M), wherein the roller (12, 13) is used to unwind the baseline (4, 5) from the respective drums (2, 3), and wherein the accumulation roller (9) is used to receive the wound yarn (8) of the interlaced yarn (7), and Includes a nozzle (6) and a corresponding compressed air supply line, wherein the baselines (4, 5) are guided close to the nozzle (6) to be impacted by the corresponding compressed air jets that cause entanglement, and The system includes a detection sensor (11) and a control unit (ECU), wherein the detection sensor (11) is used to detect the number of turns of the interlaced yarn (7) on the accumulation roller (9), and the control unit (ECU) is programmed to provide feedback control for the start and stop of the at least one electric motor (M) based on the number of turns of the yarn (8) detected by the detection sensor (11). Its features include a detection mechanism (S1-S4) for detecting the speed or movement of one or more baselines and a cutting mechanism for cutting off the compressed air, the cutting mechanism being controlled by the control unit (ECU) for: The supply of compressed air to the nozzle (6) is simultaneously or with a time delay (t”) relative to the stopping of the baselines (4, 5), and The time at which the baseline actually restarts movement, and simultaneously, or with a time advance (t'), the supply of compressed air to the nozzle (6) is restarted. When the number of baselines (4, 5) is reduced, the variable inertia of at least one of the rollers (2, 3) is compensated, while avoiding waste of compressed air or jets impacting the same portion of the baselines (4, 5) for too long, or producing unwound lengths of yarn. 8. The entanglement device (1) according to claim 7, wherein the cutting mechanism includes at least one electrically operated valve disposed upstream of the nozzle (6) along the compressed air supply line. 9. The intertwining device (1) according to claim 7 or 8, wherein the time delay and/or time advance for respectively shutting off or restarting the supply of compressed air is adjustable in the control unit (ECU). 10. The entanglement device (1) according to claim 7, wherein the time delay and/or time advance can be adjusted between 0 milliseconds and 500 milliseconds respectively relative to the stopping and starting of the electric motor (M). 11. The winding device (1) according to claim 7, wherein the control unit (ECU) provides feedback control of the cutting mechanism of the compressed air in advance or delay relative to the start and stop of the electric motor (M) based on the number of turns of the yarn (8) detected by the sensor (11). 12. The entanglement device (1) according to claim 7, comprising an encoder or speed sensor (15) arranged on the shaft of the electric motor (M) to detect its rotational speed, wherein the control unit (ECU) provides feedback control of the cut-off mechanism of compressed air based on the detected rotational speed. 13. The entanglement device (1) according to claim 7, comprising a permanent magnet (17) mounted on the accumulator or the rollers (12, 13) and a Hall sensor (16) arranged near the accumulator (9) or the rollers (12, 13) to detect their rotational speed, wherein the control unit (ECU) provides feedback control of the cut-off mechanism of compressed air based on the detected rotational speed. 14. The interlacing device (1) according to claim 7, comprising a motion sensor (18) arranged to detect the movement of the corresponding baselines (4, 5) and/or the interlaced yarn (7), wherein the control unit (ECU) provides feedback control of the cut-off mechanism of compressed air based on the signal generated by the motion sensor (18). 15. The entanglement device (1) according to claim 7, comprising a detection circuit for detecting the frequency of a signal sent by the control unit (ECU) to the electric motor and detecting a current absorbed by the electric motor, wherein the control unit performs feedback control of the cut-off mechanism of compressed air based on the processing of the frequency of the absorbed current. 16. The use of the interlacing device (1) according to any one of claims 7 to 15, for intermittently supplying interlaced yarn (7) to a textile machine without wasting compressed air.