EP4239113A1 - Air spinning device and method for treating the surface inside an air spinning device - Google Patents

Abstract

The invention relates to an air spinning device and a method for surface treatment within an air spinning device with a thread withdrawal channel traversing a spinning cone with an outlet for discharging a spinning thread from the air spinning device, a spinning housing which is arranged at a distance from the spinning cone and encloses the spinning cone, and a nozzle device which can be pressurized with compressed air to produce a the spinning cone in an enveloping gap between the spinning cone and the spinning housing. In order to provide a method for surface treatment within an air spinning device and an air spinning device, which enables simple and rapid surface treatment within the air spinning device, it is provided that a fluid introduction device, which is used to supply a fluid on the outlet side to the outlet or to introduce a fluid into the Output of the thread withdrawal channel is formed.

Description

• einem einen Fadenabzugskanal aufweisenden Spinnkonus, wobei der Fadenabzugskanal einen Ausgang zum Ausleiten eines Spinnfadens aus der Luftspinnvorrichtung aufweist,
• einem im Abstand vom Spinnkonus angeordneten, den Spinnkonus einhausenden Spinngehäuse und
• einer mit Druckluft beaufschlagbaren Düsenvorrichtung zur Erzeugung eines den Spinnkonus in einem Hüllspalt zwischen Spinnkonus und Spinngehäuse umlaufenden Luftstroms.

The invention relates to an air spinning device and a method for surface treatment within an air spinning device

• a spinning cone having a thread withdrawal channel, the thread withdrawal channel having an outlet for discharging a spinning thread from the air spinning device,
• a spinning housing spaced from the spinning cone and enclosing the spinning cone and
• a nozzle device that can be pressurized with compressed air for generating an air flow circulating around the spinning cone in an enveloping gap between the spinning cone and the spinning housing.

Various methods and spinning devices are known in the textile industry in connection with the production of textile threads. Ring spinning machines and/or open-end rotor spinning machines, for example, have been in widespread use for a long time and have proven extremely successful. Furthermore, in particular in connection with the processing of synthetic yarn material, air spinning devices are also known, within which a thread is formed from a previously stretched fiber sliver via the air flow circulating around the hollow spinning cone. Within the air spinning device, the outer fibers of the sliver are laid in a known manner around the spinning cone and wound helically around the core fibers of the sliver with the aid of the rotational flow generated by one or more air nozzles in the enveloping gap between the spinning cone and the spinning housing. This produces an air-spun thread with suitable strength properties, which is transported via an outlet of the thread withdrawal channel formed by the cavity of the spinning cone to a winding device on which the air-spun thread is wound.

In principle, the air spinning process can be carried out with fibers made from different materials, both natural fibers such as cotton and/or animal wool and synthetic fibers such as polyester and mixtures of natural and synthetic fibers being able to be used. In practice, particularly when spinning polymer fibers, in particular fibers made of polyester (PES), deposits of Polymer residues, polyester fiber fragments and finishing agents on the surfaces of the air spinning device. However, such deposits can significantly disrupt the air-jet spinning process and significantly reduce the spinning result and thus the thread quality. In particular, thread breakage can occur during the air spinning process due to the resulting increased friction between the surfaces of the air spinning device and the fibers. In addition, the air nozzles and other components of the air spinning device can become clogged with deposits, so that the thread obtained has a lower strength and quality. The possible spinning area is also disadvantageously limited by such deposits.

In order to avoid such errors, it is necessary to clean the air spinning device at regular intervals, which, in addition to interrupting the spinning process, also requires the air spinning device to be opened, which leads to long downtimes of the air spinning device and associated production interruptions.

Proceeding from this, the invention is based on the object of providing a method for surface treatment, in particular for cleaning and/or supplying an additive, an air spinning device and an air spinning device which enables simple and rapid surface treatment, in particular cleaning and/or additive supply, of the air spinning device.

The invention solves the problem by a method for surface treatment, in particular for cleaning and/or for supplying an additive, an air spinning device with the features of claim 1 and by an air spinning device with the features of claim 9. Advantageous developments of the method according to the invention are in the dependent Claims 2 to 8 specified. Further developments of the air spinning device according to the invention are specified in the dependent claims 10 to 12.

• einen einen Spinnkonus durchquerenden Fadenabzugskanal mit einem Ausgang zum Ausleiten eines Spinnfadens aus der Luftspinnvorrichtung,
• ein, insbesondere koaxial, und im Abstand vom Spinnkonus angeordnetes, den Spinnkonus einhausendes Spinngehäuse, und
• eine mit Druckluft beaufschlagbare Düsenvorrichtung zur Erzeugung eines den Spinnkonus in einem Hüllspalt zwischen Spinnkonus und Spinngehäuse umlaufenden Luftstroms

aufweist.The inventive method is suitable for an air spinning device which

• a thread withdrawal channel traversing a spinning cone with an outlet for discharging a spun thread from the air spinning device,
• a spinning housing enclosing the spinning cone, arranged in particular coaxially and at a distance from the spinning cone, and
• a nozzle device that can be pressurized with compressed air for generating an air flow circulating around the spinning cone in an enveloping gap between the spinning cone and the spinning housing

having.

In the context of the present invention, a thread withdrawal channel is to be understood as such a channel through which the air-spun thread can be withdrawn or discharged from the spinning device. The thread withdrawal channel can preferably be designed in one or more parts and more preferably coaxially to the spinning cone, whereby an increased degree of freedom in the design of the spinning cone and the air spinning device can be provided.

According to a preferred embodiment, the spinning cone can likewise be configured in one or more parts and, more preferably, at least partially or completely surround the thread withdrawal channel. For example, the spinning cone can extend along the yarn withdrawal channel and thus along the yarn running and yarn withdrawal direction such that the inlet opening of the spinning cone for receiving the yarn simultaneously forms the inlet opening of the yarn withdrawal channel. The exit orifice of the spinning cone for discharging the thread from the spinning cone can more preferably form the exit of the thread withdrawal channel. In an alternative preferred embodiment, the outlet orifice of the spinning cone is connected to a through-opening of the thread withdrawal channel, with the thread withdrawal channel being configured in at least two parts by a first yarn withdrawal channel section traversing the spinning cone and a second yarn withdrawal channel section adjoining the spinning cone in the direction of yarn travel. The second thread withdrawal channel section can also preferably be formed by the spinning housing.

According to a further preferred embodiment, the thread withdrawal channel can be designed linearly along the thread running direction, in particular axially straight, without deflection sections or alternatively with at least one deflection section that deflects the thread to be drawn off from the thread running direction. The thread running direction corresponds to a straight connecting line running between the inlet orifice and the outlet. The deflection section can be a bend in the thread withdrawal channel or a projection protruding into the thread withdrawal channel. By means of one or more deflection sections arranged along the running direction of the yarn, the yarn can be Influencing its property are distracted. For example, the design of a deflection section can influence the hairiness of the thread as required. If several deflection sections are to be provided, for example to form a thread withdrawal channel section running in the form of a spiral, then the thread to be withdrawn can be impinged with a twist.

In accordance with the present invention, the spin housing encloses the spinning cone. This is to be understood as meaning a configuration of the spinning housing that at least radially surrounds the spinning cone along the direction of travel of the yarn, with the spinning housing in the usual configuration having an input spaced from the spinning cone for receiving and feeding a fiber structure to the spinning cone. The spin housing is preferably arranged coaxially to the spinning cone. The spinning housing preferably has a passage which forms the outlet, in which the outlet is arranged or through which a segment, for example of the spinning cone or of the thread withdrawal channel, which encompasses the outlet, extends.

According to a preferred embodiment, the spin housing can be designed in one piece or, in the usual configuration, in multiple pieces. The multi-part configuration advantageously allows the air spinning device to be opened in order to be able to ensure accessibility to the spinning cone in a simple manner. For example, the multi-part spinning housing can comprise two spinning housing segments which can be moved relative to one another, one spinning housing segment having an entrance for receiving and feeding a fiber structure to the spinning cone and the other spinning housing segment carrying the spinning cone.

In principle, according to a preferred embodiment, the spinning housing can have the inlet, an internal turbulence chamber encompassing the enveloping gap and preferably several turbulence air nozzles opening into the turbulence chamber, which are particularly preferably in fluid communication with at least one air supply line, with compressed air provided by the air supply line during operation of the air spinning machine via the turbulence air nozzles flows into the turbulence chamber or the enveloping gap. The turbulence air nozzle is or the turbulence air nozzles are arranged in a known manner for generating a turbulence air flow within the turbulence chamber for air spinning the fiber structure into a thread. The vortex chamber is located along a transport direction of the fiber structure, which corresponds to a thread running direction, downstream of the entrance.

• ein Fluid ausgangsseitig dem Ausgang vorgelegt oder in den Ausgang eingeleitet und
• mittels der Düsenvorrichtung ein den Spinnkonus im Hüllspalt umlaufender Luftstrom erzeugt

wird.It is characteristic of the method according to the invention that during a spinning process or during an interruption of the spinning process

• a fluid is presented to the output on the output side or introduced into the output and
• an air flow circulating around the spinning cone in the enveloping gap is generated by means of the nozzle device

becomes.

According to the method according to the invention, it is provided that at defined or definable points in time during the spinning process or in the course of a planned or unscheduled interruption of the spinning process, e.g detected deviation of the yarn quality, after a predetermined spinning or operating time or the like, a fluid is presented on the output side to the output of the yarn withdrawal channel or introduced into the output of the yarn withdrawal channel. A template in the sense of the present invention is such a fluid supply to the area in front of the outlet outside the thread withdrawal channel that the supplied fluid can be sucked in via the negative pressure present in the thread withdrawal channel. The thread withdrawal channel extends, as described above by way of example--viewed in the direction of thread travel--from the entrance or the entrance opening of the spinning cone to the exit of the air spinning device, which is formed, for example, by the open end of the hollow spinning cone. The nozzle device activated before, during or after the start of the introduction of the fluid, which preferably comprises the turbulent air nozzles, generates a spinning pressure through the air flow circulating around the spinning cone in the enveloping gap, which generates a negative pressure at the entrance of the spinning cone and consequently in the yarn draw-off channel ensures that the fluid presented to the outlet on the outlet side or introduced into the outlet can be reliably guided out of the spinning cone on the inlet side in the air spinning device. The spinning pressure then causes the fluid to be conducted at least over the peripheral surface of the spinning cone through the enveloping gap, so that a reliable impact is achieved both on the inside surface of the thread withdrawal channel and on the surface areas of the air spinning device that form the spinning cone and more preferably surround it.

The preferred method thus makes it possible to reliably supply the air-spinning device with a fluid even when it is closed and ready for operation, in order to treat the surfaces of the air-spinning device in a defined manner.

According to a preferred embodiment, the surface treatment can be a cleaning and according to a further embodiment an additive supply, by means of the former the surfaces of the air spinning device, in particular in the course of a spinning interruption, and by means of the latter the fibers of the thread and the surfaces of the air spinning device, in particular during a spinning process, can be treated or acted upon as required. When the additive is deposited on the fibers of the thread, it has a beneficial effect, in particular for subsequent processing of the thread. Furthermore, the additive supply can be used to provide the surfaces of the air spinning device with a layer or film which can reduce deposits on the surface and consequently possible clogging as well as a frictional effect between the surfaces and the fibers.

The supply of a fluid for cleaning purposes and/or as an additive makes it possible to dispense with a time-consuming opening or disassembly of the air spinning device, which is significantly shorter than the cleaning methods known from the prior art, which provide for the opening or disassembly of the air spinning device for cleaning downtimes. Furthermore, as a result, the fluid can be supplied in an alternative manner, in particular one that saves installation space. This is because a conventional fluid supply in the area of a fiber structure introduction section or in an area of the open air spinning device can now be dispensed with. The distance between the pair of output rollers of the drafting device upstream of the air spinning device in the yarn running direction or in the fiber structure feed direction can be kept small in order to be able to ensure an almost seamless feeding of the fiber structure from the drafting device to the air spinning device. Furthermore, means to be supplied for introducing an additive into the open area of the air spinning device can be dispensed with. The intervals between the fluid supply processes are preferably freely selectable, in particular due to short surface treatment times, such as short cleaning or additive supply times, compared to the known methods with corresponding downtimes, in particular more frequent surface treatments, as is preferred Cleaning or additions of additives in an exclusive or combined manner are possible, which means that a high level of production reliability can be guaranteed.

The selection of the fluid and the type of presentation of the fluid on the outlet side to the outlet and introduction into the outlet can in principle take place in any way, e.g. in such a way that the fluid is presented to the outlet as a liquid stream on the outlet side or is introduced into the outlet. According to a preferred embodiment of the invention, it is provided that the fluid is atomized before it is introduced or introduced. Atomization is understood to mean the breaking up of the liquid into fine droplets as an aerosol in a gas, for example air. The presentation or introduction of the fluid as an aerosol makes it possible to minimize the amount of fluid required for the surface treatment, while at the same time a good distribution of the fluid on the surfaces of the air spinning device to be treated can be ensured. The preferred use of the atomized fluid, ie the aerosol, also enables the surfaces of the air-spinning device to dry particularly quickly, as a result of which downtimes of the air-spinning device can be additionally reduced.

The design of the presentation of the fluid on the outlet side to the outlet or the introduction of the fluid into the outlet of the thread withdrawal channel can also be freely selected. According to a preferred embodiment of the invention, it is provided that the fluid is introduced into the thread withdrawal channel via a feed line that can be connected to the outlet of the thread withdrawal channel.

According to this preferred embodiment of the invention, in order to introduce the fluid into the thread withdrawal channel, a supply line carrying the fluid is connected to the outlet of the thread withdrawal channel, as a result of which the fluid is then introduced directly into the thread withdrawal channel as a liquid stream or in atomized form as an aerosol. This preferred embodiment of the invention ensures in a particularly reliable manner that the fluid is fed completely into the thread withdrawal channel, so that at the same time it is possible to prevent the fluid from reaching areas in the vicinity of the air-jet spinning device that are not intended for this purpose. The feed line is preferably adapted to the design of the outlet of the thread withdrawal channel in order to ensure a leak-free introduction of the fluid into the thread withdrawal channel.

According to a further preferred embodiment of the invention, it is provided that the fluid is supplied to the thread withdrawal channel via a feed line ending adjacent to the outlet of the thread withdrawal channel. According to this preferred embodiment of the invention, it is provided that, in the yarn travel direction, outside the air spinning device adjacent to the outlet of the yarn withdrawal channel, the fluid is introduced to the outlet of the yarn withdrawal channel, whereby this can be achieved, for example, by a feed line, the end of which is arranged in such a stationary manner opposite the outlet of the yarn withdrawal channel is that this is arranged outside of the yarn path during the spinning process and thus has no influence on the operation of the air spinning device during the spinning process. The feed line is aligned in such a way that the exiting fluid is presented or fed to the outlet of the thread withdrawal channel. A connection of the feed line to the outlet of the air-jet spinning device, in particular after an interruption in a spinning process, can thus be dispensed with, as a result of which downtimes can be additionally reduced.

According to a further preferred embodiment of the invention, it is provided that the fluid is discharged via an expansion space adjoining the enveloping gap along the thread running direction and an outflow channel of the air spinning device connected to the expansion space. Because of the spinning pressure generated by the nozzle device, the fluid flows from the entrance of the thread withdrawal channel into the enveloping gap between the spinning cone and the spinning housing and subsequently into an expansion space adjacent to the enveloping gap. The fluid can then be reliably discharged from the air spinning device via an outflow channel connected to the expansion space in a fluid-conducting manner together with in particular the deposits and impurities removed by the fluid. The fluid can then, for example, be collected in a controlled manner and, if necessary, sent for post-processing, for example filtering and reuse.

According to a further preferred embodiment of the invention, it is provided that the fluid is introduced in the area of a thread preparation unit which is connected in the thread withdrawal direction to the outlet of the thread withdrawal channel of the air spinning device.

If the spinning process is interrupted, e.g. due to a break in the supplied fiber structure or because the spun thread has been separated by a controlled cut by a thread clearer, in the course of the subsequent piecing process serving to remedy the spinning interruption, the thread end of the already spun thread that has accumulated on an associated take-up spool is usually retrieved and transported through the air-jet spinning device to at least in front of the entrance of the spinning cone or into the area of the drafting system. For this purpose, it is already known to use a thread preparation unit which has, for example, a thread deflection unit and a thread guide channel arranged thereon, with the thread taken up by the winding package, for example a cross-wound bobbin, being freed of its thread twist and loose fibers within the thread preparation unit and via the outlet of the thread guide channel of the air spinning device is supplied to the spinning cone counter to the thread running direction for piecing.

According to the preferred development of the invention, it is provided that the fluid is introduced during an interruption of the spinning process, i.e. at the beginning of the interruption or later in time after the beginning, within the thread preparation unit, e.g the exit of the thread withdrawal channel into the air spinning device. This preferred embodiment of the invention ensures a particularly uniform and reliable introduction of the fluid into the air spinning device, with the thread preparation unit optionally downstream of the air spinning device also being cleaned of impurities, so that deposits in the area of the thread run between the air spinning device and the take-up bobbin are removed in a particularly reliable manner Impurities are removed and, optionally, the surfaces of the thread preparation unit can be additionally provided with a layer or a film as described above by way of example.

According to a preferred embodiment of the invention, the dynamic pressure is generated by activating the nozzle device, as a result of which an air flow is generated in the enveloping gap, before or beginning with the introduction of the fluid. This preferred embodiment of the invention ensures that at the time the fluid is introduced there is already sufficient dynamic pressure, whereby the fluid reliably reaches the air-spinning device via the entrance of the spinning cone and can be used there to treat the surfaces of the air-spinning device.

According to a further preferred embodiment of the invention, it is provided that the air flow in the enveloping gap is maintained at least temporarily, ie for a defined or definable period of time, beyond the end of the introduction of the fluid. This preferred embodiment of the invention ensures that after completion of the Introduction of the fluid via the then still existing air flow drying of the treated surfaces is carried out, whereby liquid residues such as drops or the like, which can lead to impairment of the spinning process, are particularly effectively avoided.

The invention also achieves the object by means of an air spinning device with a spinning cone having a thread withdrawal channel, the thread withdrawal channel having an outlet for discharging a spinning thread from the air spinning device, a, in particular coaxial, spaced from the spinning cone, enclosing the spinning cone, and a spinning housing that can be pressurized with compressed air Nozzle device for generating an air flow circulating the spinning cone in an enveloping gap between the spinning cone and the spinning housing. According to the invention, the air spinning device has a fluid introduction device which is designed to supply a fluid on the output side to the exit of the thread withdrawal channel or to introduce a fluid into the exit of the thread withdrawal channel.

The air spinning device can have a configuration according to one of the embodiments described above.

The air spinning device is characterized by the fluid introduction device, which - in particular at least during a spinning process or an interruption of the spinning process - is used to supply a fluid to the outlet or to introduce it into the outlet of the thread withdrawal channel, whereby a surface treatment within the air spinning device can be carried out without prior disassembly or Opening of the air spinning device can be done. The fluid introduction device is preferably designed so that the fluid, e.g. conveyed from a suitable reservoir, can be supplied to the exit of the thread withdrawal channel, where it then reaches the air spinning device via the exit of the thread withdrawal channel due to spinning pressure as a result of activation of the nozzle device and causes a treatment of the surfaces of the air spinning device. As an alternative to this, the air spinning device is preferably designed to introduce the fluid, for example conveyed from a suitable reservoir, into the outlet of the thread withdrawal channel.

The air spinning device thus enables deposits and impurities to be removed within the air spinning device in a particularly simple and convenient manner Necessity to open or dismantle the same, whereby particularly short downtimes of the air spinning device can be achieved for their cleaning. Alternatively, the surfaces may be coated or filmed in a manner described above.

The air spinning device is preferably designed to carry out a method according to one of the preferred embodiments described above.

The configuration of the fluid introduction device for supplying or for introducing the fluid can in principle be freely selected. According to a preferred embodiment of the invention, it is provided that the fluid introduction device has a supply line that can be connected to the outlet of the thread withdrawal channel, in particular in a liquid-tight manner, and/or that can be arranged adjacent to the outlet of the thread withdrawal channel. According to this preferred embodiment of the invention, the fluid introduction device has a feed line which is connected, for example, to a fluid reservoir and via the outlet of which the fluid is fed to the outlet of the thread withdrawal channel. For this purpose, the feed line can preferably be designed to be connected directly to the thread withdrawal channel or is stationarily arranged adjacent to the outlet of the thread withdrawal channel such that the fluid emerging from the feed line reliably reaches the outlet of the thread withdrawal channel.

According to a further preferred embodiment of the invention, it is provided that the fluid introduction device is designed for atomizing the fluid. According to this preferred embodiment of the invention, the fluid can be introduced to the outlet of the yarn withdrawal channel as an aerosol or introduced into the outlet of the yarn withdrawal channel by means of the fluid introduction device, whereby a particularly good distribution of the fluid within the air spinning device is achieved while reducing the fluid required for surface treatment.

According to a further preferred embodiment of the invention, the feed line is connected to a thread preparation unit arranged downstream of the exit of the thread withdrawal channel in the thread running direction. According to this preferred embodiment of the invention, the fluid is fed into the air spinning device by introducing the fluid into a thread preparation unit downstream of the thread withdrawal channel, which is used after an interruption in the spinning process, e.g Fiber structure or because the spun thread was separated by a controlled cut of a thread cleaner, to retrieve the thread end that has usually accumulated on an associated take-up bobbin and feed it to the air-jet spinning device, where a piecing process and a subsequent spinning process then takes place within the air-spinning device.

Depending on the intended use, the fluid is either a cleaning fluid with a cleaning effect on the surfaces inside the air-jet spinning device or an additive with an effect that influences the fiber or thread properties directly or indirectly via contact with the surfaces inside the air-spinning device as required . The composition of such cleaning fluids, which in particular can have water or an air-water mixture or another composition, and additives, for example EP 2 730 695 A1 previously known, are well known from the prior art and are not the subject of the present invention, which is why a detailed description of a corresponding composition is not given.

Fig. 1

in einer schematischen Darstellung eine erste Ausführungsform einer Luftspinnvorrichtung mit vorgelagertem Streckwerk;

Fig. 2

in einer schematischen Darstellung eine zweite Ausführungsform einer Luftspinnvorrichtung mit vorgelagertem Streckwerk und

Fig. 3

in einer schematischen Darstellung eine einer Luftspinnvorrichtung in Fadenlaufrichtung nachgelagerten Fadenvorbereitungseinheit.

Embodiments of the invention are explained below with reference to the drawings. In the drawings show:

1

in a schematic representation, a first embodiment of an air-jet spinning device with an upstream drafting system;

2

in a schematic representation of a second embodiment of an air spinning device with an upstream drafting system and

3

in a schematic representation of an air spinning device downstream in the direction of yarn travel yarn preparation unit.

In figure 1 For a general understanding of how an air spinning device 2 works, the basic structure of a drafting system 1 with a downstream air spinning device 2 is shown. A fiber structure, not shown here, drawn off from a fiber structure source, not shown here, is drawn in by an input roller pair formed by an input upper roller 26 and an input lower roller 27 . Then the fiber strand between the second upper drafting roller 28 and the second lower drafting roller 29 and the third upper drafting roller 24 and the third lower drafting roller 25 and the subsequent pair of output rollers consisting of an upper roller 22 and a lower roller 23 is drawn in a defined manner. The stretched fiber structure then passes through an entry area 12 a fiber structure introduction unit and downstream nozzle device 6 into the air spinning device 2 and is transformed therein using a spinning cone 5 and the nozzle device 6 of the air spinning device 2 into a thread. The air spinning device 2 has a multi-part spinning housing 13 with a first spinning housing segment comprising the inlet area 12 and the nozzle device 6 and a second spinning housing segment which carries the spinning cone 5 . The first and second spin housing segments are designed to move relative to each other to open the air spinning device 2 along the running direction of the yarn, whereby the spinning cone 5 is exposed in the open state of the air spinning device 2 or the spin housing 13 and is accessible from outside the spin housing 13.

The nozzle device 6 has nozzles 7 , 8 which are connected to a compressed air source 10 via lines 9 . The air flowing out of the nozzles 7, 8 generates a turbulent air flow, which is applied to the stretched fiber structure. The air flow flows around the spinning cone 5 in an envelope gap 15 between the spinning cone 5 and the spinning housing 13, which is arranged coaxially to the spinning cone 5 and encloses the spinning cone 5, and thus acts on the drawn fiber structure. In the air spinning device 2, outer winding fibers of the fiber structure are wound around the inner core fibers of the fiber structure due to the turbulent air flow prevailing within the air spinning device 2 in the sheathing gap 15, thereby ensuring the desired strength of the thread. The thread thus formed is then withdrawn from the air spinning device 2 via an exit 17 of the thread withdrawal channel 3, which extends in the thread running direction R from an entrance 4 of the spinning cone 5 to its exit 17.

For the treatment of surfaces within the air spinning device 2 in the closed state, in figure 1 The air spinning device 2 shown has a fluid introduction device 11a, by means of which a fluid, for example a cleaning liquid or an additive, is introduced as an aerosol to the outlet 17 of the yarn guide channel 3 via a feed line 14 and a nozzle 16, for example during a spinning process or in the event of a spinning interruption. In order to introduce the fluid into the air spinning device 2, the nozzle device 6 is activated before or during the application of the fluid at the outlet 17, as a result of which a spinning pressure is present within the air spinning device 2, as a result of which the enveloping gap 15 between the spinning cone 5 and the spinning housing 13 circulates Air flow at the entrance 4 of the spinning cone 5 is a negative pressure, so that the fluid via the outlet 17 through the Yarn guide channel 3 is passed to the entrance of the spinning cone 5 and from there into an expansion space 19 . With this flow, the fluid effects a treatment or action on the surfaces within the air spinning device 2, with the fluid reaching the expansion chamber 19 due to the spinning pressure, from where it can be discharged via the discharge channel 20, for example with impurities detached from the surfaces.

Activation of the nozzle device 6 beyond the end of the introduction of the fluid causes drying of the surfaces treated with the fluid within the air spinning device 2.

In figure 2 a further embodiment of an air spinning device 2 is shown, which differs from that in figure 1 shown air spinning device 2 in that the fluid introduction device 11b has an in particular flexible feed line 14, at the free end of which a connection element 18 is arranged, by means of which the feed line 14 can be directly connected in a liquid-tight manner to the outlet 17 of the thread withdrawal channel 3. A fluid, for example a cleaning liquid or an additive, can then be introduced directly into the thread withdrawal channel 3 via the connection element 18 . For the liquid-tight arrangement, the connecting element 18 according to this preferred exemplary embodiment has a conical shape, which comes into operative connection with a conical receptacle formed in or on the outlet 17, for example in the form of a sealing lip.

figure 3 shows a schematic representation of a thread deflection unit 30 which is optionally downstream of the air spinning device 2 and which is connected to a thread preparation unit 31 via a thread guide channel 32 connected to its outlet 33 . The air spinning device 2, the thread deflection unit 30 and the thread preparation unit 31 with its thread guide channel 32 are components of a spinning station of an air spinning machine, not shown here, in which during the spinning process a thread emerging from the air spinning device 2 is wound onto a take-up bobbin, not shown here.

During the normal spinning process, the thread produced in the air spinning device 2 is withdrawn from this and fed via the thread deflection unit 30, the thread guide channel 32 and the thread preparation unit 31 to a take-up bobbin on which the thread is wound. If there is a spinning interruption, e.g. B. due to a breakage of the thread or due to a controlled cut of an already spun thread, before a Restarting the spinning process, a piecing process must first be carried out. In order to carry out a piecing process, it is necessary to arrange the end of the finished thread, which is usually on the take-up spool, back in the area of the fiber structure in the air-jet spinning device 2 .

For this purpose, the thread end of the thread that has already been produced is usually retrieved from the take-up spool via a thread transfer device (not shown here) and transferred to the thread preparation unit 31, which is equipped with a holding and release tube 34 and is arranged downstream of the air spinning device 2 in the thread running direction R, in order in the holding and release tube 34 free the thread end from twists and loose fibers as far as possible while clamping the thread. For this purpose, an injection nozzle (not shown) is positioned in front of the holding and opening tube 34 in the thread running direction R, via which compressed air can be supplied to the thread guide channel 32 and a turbulent air flow directed counter to the thread running direction R can be generated in the region of the holding and opening tube 34 to open the thread end. When compressed air is present in the thread guide channel 32 , the loosened and prepared thread is reliably fed via a passage channel 35 to the outlet 17 of the air spinning device 2 .

To introduce a fluid into the outlet 17 of the air spinning device 2, the thread guide channel 32 of the thread preparation unit 31 is connected to a fluid introduction device 11c, by means of which the fluid, for example a cleaning liquid or an additive, is fed via a feed line 14 and a nozzle 16 in, for example, atomized form into the Thread guide channel 32 of the thread preparation unit 31 can be introduced. After an interruption in the spinning process, with compressed air present in the yarn guide channel 32 and with spinning pressure present in the air spinning device 2, the compressed air flow prevailing in the yarn guide channel 32 causes the fluid to be entrained and the negative pressure present in the yarn withdrawal channel 3 causes the fluid to be introduced into the outlet 17 of the Thread withdrawal channel 3, in which this causes a treatment of the inner surfaces of the air spinning device 2 in the manner described above.

Reference List

1 drafting system 19 expansion space 2 air spinning device 20 drainage channel 3 thread withdrawal channel 22 output top roller 4 spinning cone inlet 23 exit bottom roller 5 spinning cone 24 third drafting system top roller 6 nozzle device 25 third drafting system bottom roller 7 jet 26 input top roller 8th jet 27 input bottom roller 9 Line 28 second drafting system top roller 10 compressed air source 29 second drafting system bottom roller 11a, 11b, 11c fluid delivery device 30 thread deflection unit 31 thread preparation unit 12 entry area 32 yarn guide channel 13 spin housing 33 Exit 14 feed line 34 holding and release tubes 15 envelope gap 35 through channel 16 jet 17 Exit R yarn direction 18 connection element

Claims (12)

Process for surface treatment within an air spinning device (2), the - a thread withdrawal channel (3) passing through a spinning cone (5) and having an outlet (17) for discharging a spinning thread from the air spinning device (2), - a spinning housing (13) arranged at a distance from the spinning cone (5) and enclosing the spinning cone (5), and - A nozzle device (6) which can be pressurized with compressed air for generating an air flow circulating around the spinning cone (5) in an enveloping gap (15) between the spinning cone (5) and the spinning housing (13). having,
characterized in that
during a spinning process or an interruption of the spinning process - A fluid on the output side is presented to the output (17) or introduced into the output (17) and - By means of the nozzle device (6) generates a spinning cone (5) in the enveloping gap (15) circulating air flow becomes. Method according to Claim 1, characterized in that the fluid is atomized before being fed in front of or into the thread withdrawal channel (3). Method according to Claim 1 or 2, characterized in that the fluid is introduced into the thread withdrawal channel (3) via a feed line (14) which can be connected to an outlet (17) of the thread withdrawal channel (3). Method according to one or more of the preceding claims, characterized in that the fluid is supplied to the thread withdrawal channel (3) via a feed line (14) ending adjacent to the outlet (17) of the thread withdrawal channel (3). Method according to one or more of the preceding claims, characterized in that the fluid flows through an expansion space (19) adjoining the enveloping gap (15) and a discharge channel connected to the expansion space (19). (20) is discharged. Method according to one or more of the preceding claims, characterized in that the fluid is introduced in the region of a thread preparation unit (21) downstream of the outlet (17) of the thread draw-off channel (3) in the thread draw-off direction (R). Method according to one or more of the preceding claims, characterized in that the air flow is generated in the enveloping gap (15) before or beginning with the introduction of the fluid. Method according to one or more of the preceding claims, characterized in that the air flow in the enveloping gap (15) is maintained at least temporarily beyond the end of the introduction of the fluid. Air spinning device (2) with - a yarn withdrawal channel (3) passing through a spinning cone (5) and having an outlet (17) for discharging a spinning yarn from the air spinning device (2), - a spinning housing (13) arranged at a distance from the spinning cone (5) and enclosing the spinning cone (5) and - a nozzle device (6) which can be pressurized with compressed air for generating an air flow circulating the spinning cone (5) in an enveloping gap (15) between the spinning cone (5) and the spinning housing (13), marked by
a fluid introduction device (11a, 11b, 11c) which is designed to supply a fluid on the outlet side to the outlet (17) or to introduce a fluid into the outlet (17). Air spinning device (2) according to Claim 9, characterized in that the fluid introduction device has a feed line (14) which can be connected to the outlet (17) of the yarn withdrawal channel (3) and/or arranged adjacent to the outlet (17) of the yarn withdrawal channel (3). Air spinning device (2) according to claim 9 or 10, characterized in that the Fluid introduction device (11a, 11b, 11c) is designed for atomizing the fluid. Air-jet spinning device according to one or more of Claims 9 to 11, characterized in that the feed line (14) is connected to a thread guide channel of a thread preparation unit (31) arranged downstream of the outlet (17) of the thread withdrawal channel (3) in the direction of thread travel.

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