EP4015680A1 - Cleaning device for a yarn forming element of an air spinning nozzle and method for cleaning such a yarn forming element - Google Patents

Abstract

The invention relates to a cleaning device for a yarn-forming element of an air-jet spinning nozzle, a spinning station of an air-jet spinning machine and a method for cleaning such a yarn-forming element. In order to provide a spinning station of an air-jet spinning machine and a method for cleaning a yarn-forming element of an air-jet spinning machine, which enable long and trouble-free operation with consistent quality and strength of the yarn produced, it is provided that the cleaning device has a cleaning tape and a storage unit for providing and drawing in the cleaning tape , wherein a fixed end of the cleaning tape is fixed to the storage unit and a free end of the cleaning tape can be made available for cleaning and can be retracted again after cleaning. In addition, the cleaning device has a cleaning tape guide for feeding the free end of the cleaning tape to the yarn-forming element of the air spinning nozzle for mechanical cleaning.

Description

The invention relates to a cleaning device for a yarn-forming element of an air-jet spinning nozzle, a spinning station of an air-jet spinning machine and a method for cleaning such a yarn-forming element.

In general, during air spinning, a drafting sliver is drawn in a defined manner according to the yarn count to be achieved by means of a multi-roller drafting system and then fed to an air spinning nozzle. Inside a turbulence chamber of the air spinning nozzle, the outer fibers of the sliver are wound around an internal fiber core by means of a turbulent air flow generated by air nozzles in the area of an inlet opening of a yarn-forming element of the air spinning nozzle, resulting in an air-yarn-specific yarn structure of a parallel yarn core and twisted fibers lying at a certain angle, whereby the wrapping fibers are crucial for the desired strength of the yarn. There are clear limits to how many fibers must be present in the cross section in order to achieve sufficient strength, which is why conventionally spun air yarns are typically in a fineness range of Ne 20 - 50.

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, when spinning with a high proportion of polymer fibers, in particular fibers made of polyester (PES), there is often a deposit of polymer residues, polyester fiber fragments and/or finishing agents on a surface of a spinning cone of the yarn-forming element. However, such deposits significantly disrupt the air-jet spinning process and significantly reduce the spinning result and thus the yarn quality. In particular, yarn breakages can occur during the spinning process due to the increased friction between the surfaces of the air spinning nozzle and the fibers. In addition, the air nozzles and other components of the air spinning nozzle can become clogged with deposits, so that the yarn obtained has a lower yarn strength and yarn quality. The possible spinning area is also disadvantageously limited by such deposits.

The invention is therefore based on the object, a spinning position of an air spinning machine and to provide a method for cleaning a yarn-forming element of an air spinning nozzle, which enables particularly long and trouble-free operation with consistent quality and strength of the yarn produced.

The object is achieved according to the invention by a cleaning device for a yarn formation element of an air spinning nozzle according to claim 1, a spinning station of an air spinning machine according to claim 4 and a method for cleaning a yarn forming element of an air spinning nozzle according to claim 7. Advantageous developments of the invention are specified in the dependent claims.

The cleaning device according to the invention for at least one yarn-forming element of an air spinning nozzle, which is designed for use in an air spinning machine, has a cleaning tape and a storage unit for providing and drawing in the cleaning tape, with a fixed end of the cleaning tape on the storage unit, in particular detachable and fixable for replacement of the cleaning tape, and a free end of the cleaning tape can be made available, in particular rolled out, for cleaning the yarn-forming element, and can be retracted again, in particular rolled up, after cleaning. In addition, the cleaning device has a cleaning tape guide for feeding in the free end of the cleaning tape for mechanical cleaning of the yarn-forming element of the air spinning nozzle.

Furthermore, the fixed end is preferably fixed such that it can rotate about an axis of extension of the cleaning tape. As a result, undesirably severe twisting of the cleaning tape, which propagates as a result of multiple guidance of the free end around the yarn-forming element, can be avoided. The rotatably fixed fixed end consequently rotates passively with delay in the course of the propagating twisting forces acting on the cleaning tape. Alternatively or additionally preferably, an active rotation of the fixed end around the axis of extension of the cleaning tape by means of a rotary drive can be provided in order to enable the fixed end to rotate in a controlled, defined, in particular identical, manner in accordance with the movement of the free end, as a result of which the twisting forces can be reduced as required .

The spinning position of an air spinning machine according to the invention has a supply for a sliver to an air spinning nozzle, the air spinning nozzle with a sliver inlet to the inlet of the supplied sliver into the air spinning nozzle, a turbulence chamber arranged inside the air spinning nozzle for generating a turbulent air flow by means of at least one turbulence air nozzle opening into the turbulence chamber, at least one yarn-forming element arranged inside the turbulence chamber for producing a yarn from the fiber sliver inlet into the turbulence chamber of the air spinning nozzle via an outlet supplied fiber sliver, a withdrawal channel extending through the yarn-forming element for drawing off the air-spun yarn, and a cleaning device, in particular a cleaning device according to the invention, with a free end of a cleaning tape that can be made available from a storage unit and fed to the vortex chamber and can also be retracted again after cleaning for mechanical cleaning of a surface of the yarn forming element.

In the method according to the invention for cleaning a yarn-forming element of an air spinning nozzle, in particular a surface of a yarn-forming element, a free end of a cleaning tape is first drawn out of a cleaning device through a discharge channel of a yarn-forming element into the turbulence chamber of the air-spinning nozzle, in particular up to an outlet of a sliver inlet leading into the turbulence chamber , via which the sliver is introduced into the air spinning nozzle and into the turbulence chamber, and then a turbulence air flow is generated in the turbulence chamber by means of at least one turbulence air nozzle opening into the turbulence chamber, in order to sweep the cleaning ribbon, in particular multiple times, over one surface at least at the tip of the yarn-forming element and /or over at least one nozzle orifice of the whirling air nozzle and/or over a surface of the discharge duct in order to clean the corresponding areas. Finally, after the cleaning process, the cleaning tape is drawn back through the discharge channel in the direction of or to the cleaning device, preferably into the cleaning device.

Using the proposed cleaning device and the proposed method, mechanical cleaning of components inside the turbulence chamber of an air spinneret can be carried out in a particularly simple manner, with it being particularly advantageous not to have to open the air spinneret so that the cleaning can be carried out particularly quickly and trouble-free can.

An air spinneret is first understood to mean any spinneret which, by means of at least one air stream, twists fibers, in particular twisted fibers, around an internal fiber core into one Thread or yarn tangled. The process of yarn formation takes place in the area of a turbulence chamber of the air spinning nozzle, in which at least one yarn-forming element is arranged. The air spinning nozzle is surrounded by a spinning station, each spinning station serving to produce a yarn from a fiber sliver fed to the air spinning nozzle of the spinning station.

The air spinning nozzle has a feed and an inlet for the sliver. Furthermore, the air spinning nozzle has an internal swirl chamber, one or more yarn forming or spinning elements arranged at least in sections in the swirl chamber, and an outlet for the air-spun yarn produced inside the swirl chamber. The outlet is preferably formed as a discharge channel that completely penetrates the yarn-forming element. The withdrawal channel is preferably partially arranged by the yarn-forming element and a yarn channel adjoining the yarn-forming element in the withdrawal direction of the air-jet yarn, or is formed exclusively by the yarn-forming element.

In addition, a plurality of turbulence air nozzles opening into the turbulence chamber are preferably arranged on the air spinning nozzle, which are particularly preferably in fluid communication with at least one air supply line, with compressed air provided by the air supply line flowing through the air nozzles into the turbulence chamber during operation of the air spinning machine. 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 sliver into a yarn. The eddy chamber is located behind the sliver inlet in the transport direction of the sliver or the sliver inlet forms a feed opening or an outlet for the sliver to be fed to the eddy chamber on a side facing the eddy chamber.

A yarn or a thread within the meaning of the invention is a fiber structure in which at least some of the fibers are wound around an internal fiber core. A yarn can also be a roving or a roving for further processing, for example by means of a ring spinning machine. The sliver and thus the yarn produced from it is preferably formed at least partially, particularly preferably completely, from synthetic fibers or man-made fibers, for example from polyester or from polyethersulfone.

The sliver is basically the one that is supplied to the air spinning process Fibrous material that is preferably provided as a cohesive band or composite of fibers to be spun. All the fibers can be formed from the same material or the sliver can contain fibers that are chemically different from one another. In principle, however, the fibers in the sliver are not yet spun together.

The yarn-forming element can be an independent component, a section of a structural unit, or a functional unit that is directly involved in the air-jet spinning process. The yarn formation element can be formed in one piece or in several pieces. The yarn-forming element preferably has a spinning cone or a part of a spinning cone. The yarn-forming element particularly preferably forms the spinning cone. During the air-spinning process, the yarn-forming element comes into direct contact, at least in sections, with the fibers to be spun to produce the yarn and with the spun yarn.

A cleaning device is basically any device by means of which it is possible to mechanically clean a yarn-forming element of an air-jet spinning nozzle of an air-jet spinning machine. The mechanical cleaning is preferably a mechanical rubbing of the surface to be cleaned inside the air spinning nozzle by means of the cleaning tape. However, the mechanical cleaning can also be supported by a chemical cleaning medium, preferably a cleaning liquid and particularly preferably an aqueous cleaning solution on the cleaning tape. In addition, it is conceivable to introduce a corresponding chemical cleaning medium, in particular a cleaning liquid, into the vortex chamber and thereby in particular onto the surfaces to be cleaned to support the mechanical cleaning by the cleaning tape.

The cleaning tape can in principle have any length, any diameter and any chemical composition, as long as the cleaning tape can still be guided to the surface of the air spinning nozzle to be cleaned and is suitable for cleaning. The cleaning tape is preferably at least 10%, particularly preferably at least 50%, very particularly preferably at least 100% and particularly preferably at least 200% longer than the distance between the storage unit of the cleaning device and the surface to be cleaned that is furthest away, so that even with wear of the cleaning tape, especially in the area of the tip of the cleaning tape, a complete cleaning is still possible.

The cleaning tape is preferably formed from a fiber material and/or has a rough surface in order to support the mechanical cleaning. In addition, the cleaning tape is so flexible that the end of the cleaning tape inserted into the air spinning nozzle for cleaning can be moved, in particular multiple times, over the surfaces of the air spinning nozzle to be cleaned, in particular the yarn-forming element and/or a nozzle orifice of the whirling air nozzle, due to the turbulent air flow. The cleaning tape is particularly preferably formed in such a way that it can be guided several times over a spinning cone tip, over at least one nozzle orifice of the turbulence air nozzle and/or over a surface of a discharge channel by means of the turbulent air flow.

Furthermore, the free end of the cleaning tape preferably forms a bundle of fibers, in particular with or after exposure to the turbulent air and/or moisture. As a result, the free end with a plurality of individual fiber ends can be provided fanned out in the vortex chamber, which enables effective cleaning. The moisture required for fanning out can be supplied, for example, via the turbulence air nozzle. The fiber ends that can be separated can be twisted or glued together before being fed into the turbulence chamber, with the holding forces for fanning out being released by the turbulence air and/or the moisture.

The storage unit is initially any component or any assembly group for storing the drawn-in cleaning tape during operation of the spinning station or the air-jet spinning machine outside of a cleaning process. The storage unit can have a closed housing and/or be a self-contained unit. In principle, however, the storage unit can also be integrated into another device or structural unit of the air-jet spinning machine and in particular the spinning position. The cleaning tape is preferably kept or stored in a rolled-up state. Although it is fundamentally also conceivable for a plurality of cleaning tapes to be stored in a storage unit, it is preferred that exactly one cleaning tape is located in each storage unit.

In order to enable cleaning, the cleaning tape is made available from the storage unit and then retracted again. The provision can in particular both actively by means of a drive device or preferably passively by grasping and pulling at one end of the cleaning tape by means of another device at the spinning station, on the air-jet spinning machine or at a service unit serving the spinning station and/or through a targeted air flow. For cleaning, the cleaning tape is preferably pulled out or moved at least to the surface to be cleaned that is located furthest away from the storage unit of the cleaning device. The retraction can also preferably take place actively by means of a drive device or in particular by a spring that is tensioned when ready. However, passive retraction due to gravity or an externally applied air flow is also conceivable. However, active retraction is preferred.

The storage unit can in particular be equipped with a device for connecting the individual fiber ends of the free end in the course of the drawing-in. For example, a twisting device can be provided which twists the bundle of fibers and thus restores a compact free end from individual fiber ends connected to one another by holding forces for renewed, easy insertion into the drainage channel. As an alternative or in addition to this, the device can have a means for moistening the individual fiber ends and a means for compacting the moistened individual fiber ends to form the compact free end.

A cleaning tape guide is understood to mean any means and any device that contributes to the cleaning tape getting or being fed out of the storage unit or after leaving the storage unit to the air spinning nozzle and in particular into the interior of the air spinning nozzle. The cleaning tape guide can be formed in one piece as a component or in several pieces as an assembly. The cleaning tape guide can also be formed by means of further components of an air-jet spinning machine, in particular by means of further components of a spinning station of an air-jet spinning machine, or by means of components of the service unit serving the spinning station. In addition, the cleaning ribbon guide can also be understood functionally and can thus be any means to guide the cleaning ribbon with a free end to the yarn-forming element to be cleaned.

A service unit is understood to mean any conventional facility or device that is located along the plurality of spinning positions, in particular those that are lined up next to one another can move at least one air-jet spinning machine in order to carry out supporting thread handling and/or maintenance or service activities at a respective spinning station if necessary.

In a preferred embodiment of the cleaning device, the storage unit has a storage spool for unwinding and rolling up the cleaning tape, with the fixed end of the cleaning tape preferably being fixed to the storage spool, as a result of which the cleaning tape can be wound up and down particularly easily and without the risk of knots or loops forming can be unrolled. Furthermore, the storage spool with a cleaning tape located on it can be removed from the storage unit, so that the cleaning tape can be changed and/or renewed in a simple manner.

According to an advantageous development of the cleaning device, the storage unit and in particular the storage coil is connected to an automatic and/or motorized drive unit for controlled provision and/or retraction of the free end of the cleaning tape, whereby active control is possible in a particularly simple manner. The drive unit can be operated electrically and/or pneumatically. The drive unit is preferably a motor, although a direct drive by means of at least one air flow is also conceivable.

Although the cleaning device can in principle be arranged at any position of a spinning position, an air-jet spinning machine or a service unit, a preferred embodiment of the spinning position of an air-jet spinning machine according to the invention provides that the cleaning device is arranged outside the turbulence chamber and preferably outside the area of the air-jet spinning nozzle, so that the Air spinning process can be carried out undisturbed by the cleaning device. The cleaning device is particularly preferably arranged in a thread withdrawal direction of the air-spun yarn behind the yarn-forming element and/or behind the withdrawal channel and/or in the area of a unit for thread preparation, in particular on the unit for thread preparation.

An arrangement in the area of a unit for thread preparation is particularly advantageous, since the thread preparation otherwise provided for receiving one end of a spun thread can also receive the free end of the cleaning tape in a particularly simple manner and this can be inserted into the interior of the air spinning nozzle in the same way as a thread end , can lead or pull in particular into the vortex chamber, in particular up to the outlet of the sliver inlet. Correspondingly, it is also preferred that the free end of the cleaning tape is fed in, in particular up to the outlet of the fiber tape inlet, by means of a fiber guide element. In order to be able to guide the free end of the cleaning tape into the vortex chamber or to the exit of the fiber sliver inlet within the vortex chamber, the thread preparation, in particular a unit for thread preparation, can be switched accordingly, with both direct control of the thread preparation for gripping the end of the Cleaning tape is possible, as well as moving the storage unit and / or the free end of the cleaning tape in the area of the thread preparation, so that with a regular operation of the thread preparation now the cleaning tape is taken instead of the yarn.

Many prior art methods of cleaning a yarn forming element have the disadvantage that the air spinneret must be opened to do so. Although in principle cleaning of a yarn-forming element by means of a cleaning tape with an open spinneret would also be conceivable, a preferred embodiment of the method provides that cleaning always takes place in the closed spinneret or with a closed vortex chamber. In addition, it is preferred that cleaning takes place when the air-jet spinning operation is interrupted, so that there is no spun yarn or sliver to be spun in the eddy chamber and the cleaning tape can be fed in and out of the eddy chamber unhindered, in particular through the discharge channel.

A preferred development of the method for cleaning a yarn-forming element provides that the drawing-in takes place with the turbulent air flow switched on in order to remove deposits and/or to better clean the surface of the discharge channel, since with a switched-on turbulent air flow there is also a movement and/or a turbulence of the cleaning tape.

Furthermore, the turbulent air flow is preferably generated in the turbulence chamber with or after the free end of the cleaning tape has exited the discharge channel or with or after the free end has entered the turbulence chamber. As a result, an effective and reliable cleaning of the area around the discharge channel opening of the yarn-forming element within the turbulence chamber can also be ensured. Furthermore, this can be done in a reliable manner the guiding of the free end of the cleaning tape within the vortex chamber along the surface of the yarn-forming element can be made possible.

In principle, the cleaning tape can be used repeatedly for any length of time and as often as you like. However, due to increasing soiling and/or wear, especially in the area of the free end of the cleaning tape, it is advantageous to regularly separate and discard the tip of the free end of the cleaning tape, in particular using the thread-separating means of the spinning position, the air-jet spinning machine or the service unit , whereby this can be done after each cleaning, as well as after a specified number of cleanings or according to the degree of soiling or wear. The thread-separating means can particularly preferably be part of the thread preparation, by means of which a thread end can also preferably be suitably prepared in a previously known manner after a spinning interruption for a piecing process. In addition, regular replacement of the cleaning tape after a specified number of cleanings or after the degree of soiling or wear is also conceivable. In addition, the cleaning tape can also be cleaned when it is drawn in or after it is drawn into the cleaning device, in order to at least partially clean the cleaning tape and to extend its service life.

In principle, the cleaning can take place at any time and be repeated as often as you like. A preferred embodiment of the method for cleaning a yarn-forming element provides that a yarn-forming element is cleaned in the course of a spinning interruption, for example after at least one or each thread breakage, after at least one or each cut of the yarn, during removal of a take-up package wound up by means of the air-spun yarn and/or or during a change of a sliver can, from which the sliver is fed to the spinning position. Cleaning after a thread breakage makes it possible, in particular, for contamination as a possible reason for a thread breakage to be eliminated before the air-jet spinning process is resumed. Cleaning after the yarn has been cut, while the take-up bobbin is being removed or a new empty tube is being inserted in the winding device and during a sliver can change ensures consistently high yarn quality and strength, as does cleaning after a yarn breakage. Alternatively or additionally, cleaning can also be carried out periodically with defined identical or mutually different interval sections, in particular based on the operating time of the spinning position, the number of yarn breaks, the Number of yarn cuts, the number of take-up bobbins removed or the number of empty tubes used, the number of sliver can changes, generally the number of spinning interruptions or spinning stops, in order to ensure regular cleaning or to avoid longer periods without cleaning. Furthermore, as an alternative or in addition, cleaning can take place before the spinning station is put into operation after a defined downtime and/or before the spinning station is shut down in preparation for a defined downtime. This also ensures that when the air spinning process is resumed, these disruptive deposits in the air spinning nozzle are largely minimized or eliminated.

According to a further aspect of the present invention, the spinning station can be included in a working station of the air-jet spinning machine. A work station is any position on the air-jet spinning machine at which an air-spun spun thread or yarn is produced by means of the spinning station from a fiber sliver fed to the spinning station and is wound up via a winding device downstream of the spinning station in the yarn path for winding a package, in particular a cross-wound bobbin . The sliver can be fed in via a central sliver store assigned to the air-jet spinning machine or via a sliver store assigned to the individual spinning station, such as a sliver can in particular, in which a defined quantity of sliver is stored so that it can be removed from the sliver can. The work station can have further sliver or thread treatment devices for the defined and needs-based treatment of the sliver or thread. For example, the workplace can use sensors to monitor the sliver feed and/or the sliver parameters and or alternatively to monitor the thread take-off, the thread feed to the winding device, the yarn parameters, to clean out yarn defects and/or for piecing after a sliver or thread breaks or after a sliver can change or have a package take-off. Furthermore, the work station can be assigned sensors or other devices in the area of a drafting system that includes the supply of the sliver, by means of which the sliver can be defined and drawn as required and/or provided with additional fibers, in particular made of a different fiber material, a so-called core yarn.

Fig. 1

eine schematische Ansicht einer Luftspinndüse einer Luftspinnmaschine während des Spinnprozesses,

Fig. 2

eine schematische Ansicht der in Figur 1 dargestellten Luftspinndüse mit einer Reinigungsvorrichtung vor einer Reinigung eines Garnbildungselements der Luftspinndüse, und

Fig. 3

eine schematische Ansicht der in Figur 1 dargestellten Luftspinndüse mit einer Reinigungsvorrichtung während der Reinigung des Garnbildungselements.

An exemplary embodiment of a spinning position according to the invention of an air-jet spinning machine is explained in more detail below with reference to the drawings. In the figures show:

1

a schematic view of an air spinneret of an air spinning machine during the spinning process,

2

a schematic view of in figure 1 shown air spinning nozzle with a cleaning device before cleaning a yarn forming element of the air spinning nozzle, and

3

a schematic view of in figure 1 illustrated air spinneret with a cleaning device during the cleaning of the yarn-forming element.

In order to spin a yarn 14 by means of a spinning position 9 of an air-jet spinning machine from a sliver 11 that has been stretched by means of a drafting system, an in figure 1 The sliver 11 is fed to the air spinneret 12 shown purely schematically in the region of a feed 10 . The sliver 11 passes through an outlet 13 of a sliver inlet 16 into a turbulence chamber inside the air spinning nozzle 12 and is spun there by means of a turbulent air flow on a yarn-forming element 2 designed as a spinning cone to form a yarn 14, with the outer fibers of the sliver 11 being twisted by means of the turbulence generated by turbulent air nozzles Eddy air flow is wound around an internal fiber core, resulting in an air yarn-specific yarn structure of a parallel yarn core and winding fibers lying at a certain angle. Finally, the spun yarn 14 is withdrawn from the air spinneret 12 through a withdrawal channel 15 in order to be able to be fed to a subsequent yarn handling device such as a winding device for forming a package.

If a sliver 11 made of synthetic fibers, in particular polyester fibers, is used for air spinning, fiber fragments and finishes can be deposited on the surface of the yarn-forming element 2 or the surfaces of the walls of the turbulence chamber of the air-spinning nozzle 12 surrounding the yarn-forming element 2 in the course of the air-spinning process occur, which lead to a deterioration in the spinning result in the long term and thus to reduced yarn strength and quality.

In order to be able to clean this surface, a cleaning device 1 is arranged in the yarn withdrawal direction behind the withdrawal channel 15 and in the area of a unit for thread preparation of the spinning position 9 . A cleaning tape 3 is rolled up on a storage spool 8 inside a storage unit 4 of the cleaning device 1 .

The cleaning tape 3 is fixed with a fixed end 5 on the storage spool 8 in a repeatably detachable and fixable manner. The free end 6 of the cleaning tape 3 can be withdrawn from and retracted from the storage unit 4 by unwinding and winding up the storage spool 8 . The cleaning tape 3 is formed from a fiber material and has a rough surface.

In order to be able to feed the cleaning tape 3 to the air spinning nozzle 12 after it has been rolled out of the storage unit 4, the cleaning device 1 finally has a cleaning tape guide 7, which is formed by other components of the spinning station 9, in particular a unit for thread preparation.

In order to be able to clean the surface of the yarn-forming element 2, the air spinning process is interrupted and then, with the air spinning nozzle 12 still closed, the free end 6 of the cleaning tape 3 is guided into the area of the outer opening of the discharge channel 15 by means of the cleaning tape guide 7 (see Fig figure 2 ).

The free end 6 of the cleaning tape 3 is then guided into the draw-off channel 15 by means of the thread preparation and advanced there into the interior of the vortex chamber in the direction of the exit 13 of the sliver inlet 16 . By switching on the turbulent air flow inside the turbulence chamber, the free end 6 of the cleaning tape 3 is repeatedly moved against and around the surface of the yarn-forming element 2 formed as a spinning cone. By further feeding the cleaning tape 3 to the vortex chamber, the free end 6 of the cleaning tape 3 can also be guided past the nozzle openings of the vortex air nozzles, cleaning in particular taking place in the area of the tip of the yarn-forming element 2 and in the area of the nozzle openings. The movement of the free end 6 caused by the turbulent air flow continues along the cleaning belt 3 in the direction of the fixed end 5 in such a way that the surface of the discharge channel 15 within the yarn-forming element 2 is also cleaned. The fixed end 5 of the cleaning tape 3 is rotatably fixed about the axis of extension of the cleaning tape 3 such that an undesirably strong twisting of the cleaning tape 3 by propagating the movement of the free end 6 in the direction of the fixed end 5 can be avoided.

Finally, the cleaning tape 3 is removed again via the discharge channel 15 from the inside withdrawn from the air spinneret 12, with repeated cleaning of the surface of the withdrawal duct 15 taking place. In order to be able to store the cleaning tape 3 free of knots and loops, the cleaning tape 3 is rolled up onto the storage spool 8 inside the storage unit 4 again.

Reference List

1

cleaning device

2

yarn forming element

3

cleaning tape

4

storage aggregate

5

solid end

6

free end

7

cleaning tape guide

8th

storage coil

9

spinning position

10

feeding

11

sliver

12

air spinneret

13

Exit

14

yarn

15

culvert

16

sliver inlet

Claims (11)

Cleaning device (1) for a yarn formation element (2) of an air spinning nozzle (12), with - a cleaning tape (3), - A storage unit (4) for providing and retracting the cleaning tape (3), wherein - a fixed end (5) of the cleaning tape (3) is fixed to the storage unit (4) and a free end (6) of the cleaning tape (3) can be made available for cleaning the yarn-forming element (2) and can be retracted again after cleaning, and - A cleaning tape guide (7) for feeding the free end (6) of the cleaning tape (3) to the yarn-forming element (2) for mechanical cleaning. Cleaning device (1) according to Claim 1, characterized in that the storage unit (4) has a storage spool (8) for unwinding and rolling up the cleaning tape (3), the fixed end (5) of the cleaning tape (3) being attached to the storage spool ( 8) is fixed. Cleaning device (1) according to Claim 1 or 2, characterized in that the storage unit (4) is connected to an electric and/or pneumatic drive unit for the controlled provision and retraction of the free end (6) of the cleaning tape (3). Spinning station (9) of an air spinning machine with - a feed (10) for a sliver (11) to an air spinning nozzle (12), - an air spinning nozzle (12) with a sliver inlet (16) for the inlet of the supplied sliver (11) into the air spinning nozzle (12), - a turbulence chamber arranged inside the air spinning nozzle (12) for generating a turbulence air flow by means of at least one turbulence air nozzle opening into the turbulence chamber, - a yarn-forming element (2) arranged within the eddy chamber for producing a yarn (14) from the sliver (11) fed into the eddy chamber via an outlet (13) of the sliver inlet (16), - A through the yarn-forming element (2) extending withdrawal channel (15) for withdrawing the air-spun yarn (14), and - A cleaning device (1), in particular according to at least one of Claims 1 to 3, with a free end (6) of a cleaning belt (3) which can be made available from a storage unit (4) and fed to the vortex chamber, for mechanically cleaning a surface of the yarn-forming element (2) . Spinning station (9) of an air-jet spinning machine according to Claim 4, characterized in that the cleaning device (1) is arranged outside the air-jet spinning nozzle (12). Spinning position (9) of an air-jet spinning machine according to Claim 4 or 5, characterized in that the cleaning device (1) is arranged downstream of the yarn-forming element (2) in the thread withdrawal direction of the air-jet yarn (14) and/or in the region of a unit for thread preparation. A method for cleaning a yarn-forming element (2) of an air spinning nozzle (12), comprising the steps of: - feeding a free end (6) of a cleaning tape (3) from a cleaning device (1) through a discharge channel (15) of a yarn-forming element (2) into a turbulence chamber of the air spinning nozzle (12), - Generation of a turbulent air flow in the turbulent chamber by means of at least one turbulent air nozzle opening into the turbulent chamber in order to guide the cleaning tape (3) over a surface of the yarn-forming element (2) and/or over at least one nozzle opening of the turbulent air nozzle, and subsequently - Drawing in the cleaning tape (3) through the discharge channel (15) to the cleaning device (1). Method for cleaning a yarn-forming element (2) according to claim 7, characterized in that the turbulent air flow in the turbulence chamber with or after the exit of the free end (6) of the cleaning tape (3) from the discharge channel (15) or with or after the entry of the free End (6) is generated in the vortex chamber. Method for cleaning a yarn-forming element (2) according to claim 7 or 8, characterized in that the feeding of the free end (6) of the Cleaning tape (3) is switched via a thread preparation. Method for cleaning a yarn-forming element (2) according to at least one of Claims 7 to 9, characterized in that the cleaning takes place when the air-spinning operation is interrupted with the air-spinning nozzle (12) closed. Method for cleaning a yarn-forming element (2) according to at least one of Claims 7 to 10, characterized in that the free end (6) is drawn in with the swirling air flow switched on.

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