EP2927355A2 - Spinning unit of an air jet spinning machine along with a top frame for the fixing on a spinning nozzle of an air jet spinning machine - Google Patents

Abstract

The invention relates to a spinning station of an air spinning machine with a spinneret (1), which serves to produce a yarn (2) from one of the spinneret (1) supplied fiber strand (3), wherein the spinneret (1) has an inlet (4) for the Fiber structure (3), an internal vortex chamber (5), a yarn formation element (6) projecting into the vortex chamber (5) and an outlet (7) for the yarn (2) produced in the interior of the vortex chamber (5). According to the invention, it is proposed that the spinning station is assigned an additive supply (8) which is designed to supply the spinneret (1) with an additive (9), wherein the additive supply (8) comprises at least one attachment (8) fixed to the spinneret (1). 10), via which the additive (9) provided by an additive supply line (14) of the additive supply (8) can be supplied to the spinneret (1). In addition, an attachment for fixing to a spinneret (1) of an air-spinning machine is proposed.

Description

The present invention relates to a spinning station of an air spinning machine with a spinneret, which serves to produce a yarn from a fiber composite fed to the spinneret, wherein the spinneret has an inlet for the fiber structure, an internal swirl chamber, a Garnbildelement projecting into the swirl chamber and an outlet for in the Inside the vortex chamber produced yarn.

In addition, an attachment for fixing to a spinneret of an air-spinning machine is proposed, wherein the spinneret serves to produce a yarn from a fiber composite fed to the spinneret, the spinneret having an inlet for the fiber structure, an internal swirl chamber, a yarn formation element projecting into the swirl chamber, and having an outlet for the yarn produced inside the swirl chamber.

Air-jet spinning machines with corresponding spinning stations are known in the art and serve to produce a yarn from an elongate fiber structure. In this case, the outer fibers of the fiber composite are wound around the inner core fibers by means of a vortex air flow generated by the air nozzles within the vortex chamber in the region of an inlet mouth of the yarn formation element and finally form the binder fibers which determine the desired strength of the yarn. This creates a yarn with a true rotation, which finally dissipated via a vent channel from the vortex chamber and z. B. can be wound on a sleeve.

Generally, in the context of the invention, the term yarn is thus understood to mean a fiber structure in which at least some of the fibers are around an inner fiber Core are twisted. Thus, a yarn is included in the traditional sense, which can be processed into a fabric, for example with the aid of a weaving machine. However, the invention also relates to air spinning machines, with the help of so-called roving (other name: Lunte) can be produced. This type of yarn is characterized by the fact that, despite a certain strength, which is sufficient to transport the yarn to a subsequent textile machine, it is still delayable. The roving can thus with the help of a defaulting device, z. As the drafting system, a roving processing textile machine, such as a ring spinning machine, are warped before it is finally spun.

In the production of man-made fibers, for example polyesters, or blends of natural and man-made fibers, deposits are formed on the surface of the yarn-forming element. The production of man-made fibers involves a so-called preparation of the continuous fibers during the manufacturing process. In this case, a spin finish, usually oils with various additives, applied to the continuous fibers, which allows a treatment, such as stretching the continuous fibers at high speeds. Some of these preparation agents remain attached to the man-made fibers in the further treatment and lead to impurities in the air-spinning machine. The fibers supplied to the air-spinning machine in the form of a fiber structure are usually supplied to the spinneret through a pair of delivery rollers. The delivery roller pair may correspond to an output roller pair of a drafting system. Used drafting systems serve to refine the submitted fiber structure before entering the spinneret.

In the entry region of the spinneret, a fiber guide element is usually arranged, via which the fiber structure is guided into the spinneret and finally into the area of the yarn-forming element. As Garnbildungselemente majority spindles with an internal exhaust duct used. At the tip of the Garnbildungselementes compressed air is introduced through the housing wall of the spinneret such that the said rotating vortex air flow results. As a result, individual outer fibers are separated from the fiber strand leaving the fiber guiding element and are turned over via the tip of the yarn-forming element. In the further course, these removed fibers rotate on the surface of the yarn-forming element. As a result, by the forward movement of the inner core fibers of the fiber structure, the rotating fibers are wound around the core fibers, thereby forming the yarn. Due to the movement of the individual fibers over the surface of the yarn-forming element, however, deposits on the yarn-forming element are also formed due to the adhesion to the fibers from the production process. Deposits on the yarn-forming element can also be caused by damaged fibers. Deposits can also arise on the surface of the spinning nozzle interior or the fiber guiding element for the same reasons. These adhesions lead to a deterioration of the surface quality of the Garnbildungselementes and cause deterioration of the yarn quality produced. Regular cleaning of the affected surfaces is therefore necessary in order to maintain a consistent quality of the spun yarns.

The cleaning of the surfaces of the Garnbildungselementes and the fiber guide element can be done manually by a periodic removal of Garnbildungselementes, but this leads to a considerable maintenance, combined with a corresponding loss of service leads.

The EP 2 450 478 on the other hand discloses a device which allows to perform an automatic cleaning without stopping the machine. For this purpose, an additive is added to the compressed air used for the formation of the fluidized air flow within the spinneret. The additive will guided by the compressed air to the Garnbildungselement and causes a cleaning of the surface of the Garnbildungselementes.

Another embodiment of a cleaning of the Garnbildungselementes discloses the JP-2008-095-208 , An additive is also supplied to the compressed air used for the turbulence in the spinneret and passed with this compressed air in the spinneret and thus to the Garnbildungselement. The dosage and addition of the additive is separately provided for each spinning station in the disclosed embodiment.

A disadvantage of the disclosed cleaning systems is that the dosage of the additive depends on the compressed air supply of the air nozzles. A dosage independent thereof is thus eliminated.

The same problem also occurs in principle if additive is to be added to the fiber structure in order to improve the properties of the yarn produced therefrom, for example with regard to its hairiness or strength, since the dosage in this case should be particularly precisely controllable in order to prevent more or less than the predetermined additive set amount from being applied to individual fiber strand sections.

Object of the present invention is therefore to propose a solution that allows a particularly consistent and precisely regulated supply of the spinneret with additive.

The object is achieved by a spinning station of an air spinning machine and an attachment with the features of the independent claims.

According to the invention, the spinning station is characterized in that it is associated with an additive supply which is designed to supply the spinneret with an additive, wherein the additive supply comprises at least one attached to the spinneret attachment, via which of an additive supply line the additive supply provided additive of the spinneret can be fed. The additive is thus not introduced via the air nozzles of the spinneret as known in the art. Rather, a separate attachment is proposed, via which the spinning station can be supplied independently of the air flowing through the air nozzles compressed air. The essay can be formed in one or more parts and can be subsequently attached to existing spinnerets with appropriate fixing elements. If the attachment is connected to a corresponding additive supply line, the additive, which originates, for example, from a pressure vessel storing the additive or another additive reservoir, can be supplied to the spinneret in the desired dosage, with a corresponding additive outlet of the attachment preferably in the region of the inlet of the spinneret is placed in order to give up the additive on the entering into the spinneret fiber strand can.

It is advantageous if the attachment is detachably fixed, for example by means of at least one clip connection, to the spinneret. The attachment can easily be removed from the spinneret in this case and replaced by another attachment. As a result, depending on the additive or type of fiber dressing, different attachments may be used to adjust the amount of additive dispensed through the attachment to the particular conditions. The attachment can be done for example by one or more positive elements, so that the article only has to be pressed against the spinneret during its fixation and is finally held by a snap or clip connection. Alternatively, of course, a non-detachable connection, for example by gluing, between essay and spinneret or their housing conceivable.

It is also advantageous if the attachment is at least partially made of a plastic. Depending on the choice of plastic, the article has a high resistance to a wide variety of additives used (as additives, liquid or even solid substances, or mixtures the same, with water or an aqueous solution being preferred). For example, it would be conceivable to manufacture the attachment as an injection-molded part. Likewise, the article can also have one or more coatings in order to increase the surface quality. Of course, the article can also be made of a metal or formed in several parts, wherein the individual components are made of different materials and / or can be releasably connected to each other.

It is also extremely advantageous if the attachment has at least one, preferably inner, channel with a channel inlet in fluid communication with the additive supply line and a channel outlet in fluid communication with the spinneret. The attachment thus forms a channel wall which at least partially surrounds the channel. Alternatively, the attachment can also have a recess arranged in the region of one of its surfaces, which form part of a channel. The second part of the channel can in this case be formed by a surface section of the spinneret, against which the attachment abuts (for example via an intermediate seal) such that the attachment and the spinneret together form the actual channel. Furthermore, the channel inlet can have a connection region, for example in the form of a connecting piece, to which the said additive settlement line can be connected.

It also brings advantages when the channel outlet is located in the region of the inlet of the spinneret. In this case, the additive leaving the attachment via the duct outlet can be applied directly to the fiber structure entering the spinneret. The channel outlet is also preferably located in a ring or partial ring section forming the inlet or surrounding it, so that the additive can be applied thereto perpendicularly or obliquely to the transport direction of the fiber composite. Depending on the amount of the additive to be metered, this ultimately serves to clean the yarn-forming element or to improve the properties of the fiber-wound structure mentioned above

Yarn.

Particular advantages arise when the channel outlet is arranged in the region of a fiber guide element arranged in the region of the inlet of the spinneret, so that the additive flowing through the channel in the region of the fiber guide element can be brought into contact with the fiber structure introduced into the spinneret via the fiber guide element is. The fiber guiding element serves to guide the fiber structure when entering the spinneret and preferably surrounds it in a circumferential direction running perpendicular to the transport direction. While the duct outlet of the attachment can be arranged in the region of an end face of the fiber guiding element which points outwards relative to the swirl chamber, it is likewise conceivable for the duct outlet to open into a throughflow channel formed by the fiber guiding element, which passes through the fiber structure as it enters the spinneret.

It is particularly advantageous if the attachment has an end section which encloses the channel outlet, by means of which it is fixed in the region of the fiber guide element, preferably on the fiber guide element itself. The end portion may be formed in one or more parts and held positively and / or non-positively on the fiber guide element. For example, it would be conceivable that the end portion is plugged or clipped onto an annular outer circumference of the fiber guide element.

Likewise, it brings advantages when the end portion is at least partially annular and is fixed, preferably form-fitting, to a holding portion. The end portion is for example releasably connected to the holding portion, wherein the holding portion is part of the fiber guiding element or part of the attachment, or wherein the holding portion as a separate section of the spinneret, for example, the housing is present. In particular, it is advantageous if the end portion surrounds the holding portion and is positively or non-positively connected thereto.

It is advantageous if the holding portion is at least partially annular. For example, it would be conceivable that the holding section surrounds the fiber guide element on its outer circumference and is thereby attached to this. Likewise, the holding section can form together with the fiber guide element the inlet channel of the spinneret over which the fiber structure enters the vortex chamber. Preferably, the holding portion further comprises grooves or outwardly directed bulges, via which it is releasably connected to the rest of the spinneret or the attachment or a portion thereof, wherein the holding portion in the latter case may itself be part of the attachment.

It is also advantageous if the holding section at least partially surrounds or is formed by the fiber guiding element. While the holding section may be penetrated by the fiber guiding element in the first case, in the second case the fiber guiding element has fastening elements, for example, via which the attachment can be fastened to the fiber guiding element.

It is advantageous if the holding portion is part of the attachment, wherein the holding portion with a main body of the essay, preferably releasably connected, and in particular, at least partially, consists of a different material than the essay. For example, it would be conceivable to manufacture the basic body from a plastic and the holding section from a different material, which is particularly resistant to abrasion, since the holding section primarily comes into contact with the fiber structure.

It is also advantageous if the holding section has a channel section which opens into the inlet of the spinneret. If the holding section is part of the attachment, then the channel outlet of the attachment is located in the region of the holding section. On the other hand, if the attachment is in the form of a separate component from the holding section, then the channel section of the attachment, together with the channel section of the holding section, forms the actual channel which originates from Additive must be passed after entering the attachment before it exits through the channel outlet and meets the fiber structure.

It is likewise advantageous if the channel section of the holding section is directed against the transport direction of the fiber strand introduced into the spinneret. For example, the channel section of the holding section may enclose an angle with the transport direction which lies between 20 ° and 80 °, preferably between 30 ° and 70 °. The additive is deflected in this case when leaving the channel section and transported by the fiber structure in the vortex chamber.

It is also advantageous if the attachment is at least partially fixed to a spinning air inlet element of the spinneret. The spinning-air inlet element is designed, for example, as a connection piece, via which an air-conditioning duct is connected to the spinneret and via which the compressed air necessary for the swirl distribution within the swirl chamber can flow into the spinneret. For example, it would be conceivable that the attachment has an opening or other space with which it is inserted over the neck or attached to this and is finally held in a form-fitting manner.

It is also extremely advantageous if the channel of the attachment has, at least in sections, a curved or kinked course within the attachment. For example, the channel and / or attachment may extend from a side portion of the spinneret to an inlet portion of the front portion thereof. In this case, the channel would initially run counter to the transport direction of the fiber composite and then in the direction of the inlet. In either case, a bent or kinked passageway of the channel and / or the cap allows delivery of the additive at a location spaced from the channel outlet of the cap or from the inlet of the spinneret.

Finally, the attachment for a spinneret according to the invention comprises at least one, preferably internal, channel with a channel inlet and a channel outlet, via which an additive provided by an additive supply line can be fed to the spinneret after the attachment has been fixed to the spinneret. With regard to possible features of the article reference is made to the previous and following description, the features can be implemented individually or in any combination, as far as the features are not in conflict with each other. In particular, the attachment in the region of the channel inlet should have a connection section, for example a connection, via which it can be connected to an additive supply line.

Furthermore, it is advantageous if the attachment according to the invention for a spinneret is provided with a color coding due to the diameter ratios of the inner channel, respectively of the channel inlet and / or the channel outlet. In this case, a unique identifier may be provided at a certain point of the essay or the article itself be made in a particular color. Due to the colored marking of various attachments, which can be used for different applications, a confusion is ruled out. The volume or mass flow of an additive to be metered can be changed by using different types of attachments in its area or by the type of feed.

It is also advantageous if the attachment has an end section comprising the channel outlet, wherein the end section is preferably at least partially annular, and wherein the end section comprises a holding section which is preferably fixable to the spinneret in the region of the inlet of the spinneret , For example, the holding section may be fixable to a fiber guiding element of the spinneret. Furthermore, it is advantageous if the channel of the essay within the essay at least partially a curved or has a bent course, since in this way the additive can be transported, for example, from a side region of the spinneret into the region of its inlet.

Figur 1

einen Ausschnitt einer Spinnstelle einer Luftspinnmaschine,

Figur 2

eine Spinndüse mit einem erfindungsgemäßen Aufsatz,

Figur 3

eine Spinndüse mit einem weiteren erfindungsgemäßen Aufsatz,

Figur 4

eine Schnittdarstellung eines Ausschnitts einer Spinndüse mit einem erfindungsgemäßen Aufsatz, und

Figur 5

eine Schnittdarstellung eines Ausschnitts einer weiteren Spinndüse mit einer weiteren Ausführungsform eines erfindungsgemäßen Aufsatzes.

Further advantages of the invention are described in the following exemplary embodiments. Show it:

FIG. 1

a section of a spinning station of an air-spinning machine,

FIG. 2

a spinneret with an attachment according to the invention,

FIG. 3

a spinneret with a further attachment according to the invention,

FIG. 4

a sectional view of a section of a spinneret with an attachment according to the invention, and

FIG. 5

a sectional view of a section of another spinneret with a further embodiment of an attachment according to the invention.

FIG. 1 shows a section of a spinning unit according to the invention an air-spinning machine (the air-spinning machine of course, a plurality of, preferably adjacent to each other, can have spinning stations). If required, the air-spinning machine may comprise a drafting system comprising a plurality of drafting rollers 29, which is supplied with a fiber structure 3, for example in the form of a relined conveyor belt. Furthermore, the spinning station shown comprises a spinneret 1 with an internal swirl chamber 5, in which the fiber structure 3 or at least a part of the fibers of the fiber composite 3 after passing through an inlet 4 of the spinneret 1 is provided with a rotation (the exact operation of the spinning station is in Described in more detail below).

In addition, the air-spinning machine may comprise a pair of take-off rollers downstream of the spinneret 1 (not shown) and a winding device downstream of the take-off roller pair (also not shown) with a sleeve for winding up the yarn 2 leaving the spinning station. The spinning station according to the invention need not necessarily have a drafting system. Also, the pair of take-off rollers is not absolutely necessary.

The spinning station shown generally works by an air spinning process. To form the yarn 2, the fiber structure 3 is guided into the swirl chamber 5 of the spinneret 1 in a transport direction T via a fiber guide element 18 provided with an inlet opening forming said inlet 4. There it receives a rotation, d. H. At least a portion of the free fiber ends of the fiber composite 3 is detected by a vortex air flow, which is generated by appropriately arranged in a vortex chamber 5 surrounding Wirbelkammerwandung air nozzles 22 (wherein the air nozzles 22 are supplied, for example via an air distributor 23 with compressed air, via an air supply line 25 flows into the air distributor 23). A part of the fibers is in this case pulled out of the fiber structure 3 at least a little bit and wound around the tip of a projecting into the swirl chamber 5 Garnbildelements 6.

The fact that the fiber structure 3 is withdrawn through an inlet mouth of Garnbildungselements 6 via a arranged inside the Garnbildelements 6 exhaust duct 24 from the vortex chamber 5 and finally via an outlet 7 from the spinneret 1, finally, the free fiber ends are pulled in the direction of the inlet port and As a result, the compressed air introduced via the air nozzles 22 leaves the spinneret 1 via the outlet channel 24 and a possibly present air outlet 26, which can be provided with a Vacuum source can be connected.

In general, it should be made clear at this point that the yarn 2 produced can basically be any fiber structure 3, which is characterized in that an external part of the fibers (so-called capillary fibers) around an inner, preferably untwisted or if necessary also rotated Part of the fibers, is wrapped around to give the yarn 2, the desired strength. Also included in the invention is an air-spinning machine with the aid of which so-called roving can be produced. Roving is a yarn 2 with a relatively small proportion of wraparound fibers, or a yarn 2 in which the wraparound fibers are wound relatively loosely around the inner core, so that the yarn 2 remains deformable. This is crucial if the produced yarn 2 on a subsequent textile machine (for example, a ring spinning machine) should be distorted again with the help of a drafting system or must, in order to be further processed accordingly.

With regard to the air nozzles 22, it should also be mentioned as a precautionary measure at this point that these should as a rule be aligned so that the exiting air jets are rectified in order to jointly produce a rectified air flow with a sense of rotation. Preferably, the individual air nozzles 22 are arranged in this case rotationally symmetrical to one another and open tangentially into the swirl chamber 5.

According to the invention, the spinning station is now associated with an additive supply 8 which comprises one or more additive stores 28 and one or more, preferably at least partially flexible, additive supply lines 14 via which the respective additive store 28 (eg a pressure vessel filled with additive 9 and compressed air). is in fluid communication with an arranged in the region of the spinneret 1 additive 30 (with regard to possible additives 9 is made to the previous description).

Preferably, the additive delivery 30 is in the region of the inlet 4 of Spinneret 1 (so that the additive 9 can be applied to the fiber structure 3), wherein the additive delivery 30 according to the invention by a in the FIGS. 2 to 5 Attachment 10 is shown, which will be explained in more detail later.

In order to be able to deliver the additive 9 precisely and in addition highly reproducibly via the additive delivery 30 and furthermore to be able to adapt the delivered volume or mass flow of the additive 9 to the respective conditions, the additive supply 8 furthermore comprises at least one controllable valve 27, which is preferably integrated into the corresponding additive supply line 14 and thus flows through the additive 9.

FIG. 2 now shows a first possible embodiment of an invention used in the essay 10. The article 10 has a channel inlet 13, via the additive 9 via an additive supply line 14, not shown, (which is connected to the attachment 10) in a running inside the attachment 10 channel 12 can occur (see FIGS. 4 and 5 ). Via the channel 12, the additive 9 finally flows into the region of the inlet 4 of the spinneret 1 and is there discharged onto the fiber structure 3, which enters the spinneret 1 in the transport direction T shown.

The attachment 10 and also the channel 12 can have a bent or bent profile, so that the channel inlet 13 can be located on a side face of the spinneret 1, while the dispensing of the additive 9 can take place in the region of a front side having the inlet 4. In case of FIG. 2 is the article 10 on the fiber guide element 18 and is glued to the spinneret 1, for example, or positively connected.

In a further development of in FIG. 2 shown solution, the attachment 10 may have an opening through which it is held on a spinning air inlet element 15 (see FIG. 3 ), wherein the spinning air inlet element 15th For example, with a (not shown) compressed air line is connected, via which the air nozzles 22 are supplied with compressed air.

FIG. 4 shows a section through a section of a spinneret 1 and a releasably connected thereto essay 10. The attachment 10 has a, z. B. partially annular, end portion 19, via which it is connected by a clip connection 11 with the fiber guide element 18. Furthermore, it is off FIG. 4 it can be seen that the channel 12 extending inside the attachment 10 has a channel outlet 17 which adjoins an inlet channel 31 of the fiber guiding element 18 so that the additive 9 can finally be applied to the fiber structure 3 inside the fiber guiding element 18. An adjustment of a metering range can also be carried out via different size ratios or shapes of the inner channel 12, respectively of the channel inlet 13 or the channel outlet 17.

Finally, it is also possible that the spinneret 1 or the attachment 10 a in FIG. 5 shown holding portion 20 which is fixed to a housing of the spinneret 1 or the fiber guide element 18, for example, positive and / or non-positive, wherein the holding portion 20 is in turn connected to a base body 16 of the attachment 10. The compound can also be solved in this case, z. B. by means of a clip connection 11, take place.

In addition, it is advantageous if the holding portion 20, which may be annular, for example, has a channel portion 21 which forms an extension of the extending in the base body 16 of the attachment 10 sub-channel. The channel 12 to be passed by the additive 9 is composed in this case of the partial channel of the main body 16 and the channel portion 21 of the holding portion 20, wherein the channel outlet 17 is in the region of the holding portion 20.

The present invention is not limited to the illustrated and described embodiments. Variations within the scope of the claims are also possible as any combination of the features described, even if they are shown and described in different parts of the description or the claims or in different embodiments.

LIST OF REFERENCE NUMBERS

1.

spinneret

Second

yarn

Third

fiber structure

4th

inlet

5th

swirl chamber

6th

Garnbildungselement

7th

outlet

8th.

additive supply

9th

additive

10th

essay

11th

clip connection

12th

channel

13th

duct inlet

14th

Additive supply line

15th

Spinning air inlet element of the spinneret

16th

Basic body of the tower

17th

duct outlet

18th

Fiber guide element

19th

end

20th

holding section

21st

channel section

22nd

air nozzle

23rd

air distributor

24th

culvert

25th

Air supply line

26th

air outlet

27th

Valve

28th

additive storage

29th

Drafting system roller

30th

additive delivery

31st

inlet channel

32nd

T transport direction

Claims (15)

Spinning station of an air-jet spinning machine - With a spinneret (1), which is used to produce a yarn (2) from one of the spinneret (1) supplied fiber strand (3), - wherein the spinneret (1) has an inlet (4) for the fiber structure (3), an internal vortex chamber (5), - A in the vortex chamber (5) protruding Garnbildungselement (6) and having an outlet (7) for the yarn (2) produced inside the swirl chamber (5),
characterized in that - The spinning station is associated with an additive supply (8) which is adapted to supply the spinneret (1) with an additive (9), - wherein the additive supply (8) comprises at least one at the spinneret (1) fixed attachment (10) via which the additive from an additive supply line (14) of the additive supply (8) provided additive (9) of the spinneret (1) can be fed. Spinning station according to the preceding claim, characterized in that the attachment (10) releasably, for example by means of at least one clip connection (11), is fixed to the spinneret (1). Spinning station according to one of the preceding claims, characterized in that the attachment (10) is at least partially made of a plastic material. Spinning station according to one of the preceding claims, characterized in that the attachment (10) has at least one, preferably internal, channel (12) with a channel inlet (13) in fluid communication with the additive supply line (14) and with the spinneret (1) in FIG Having fluid connection standing channel outlet (17), wherein the channel outlet (17) is preferably arranged in the region of the inlet (4) of the spinneret (1). Spinning station according to Claim 4, characterized in that the channel outlet (17) is arranged in the region of a fiber guide element (18) arranged in the region of the inlet (4) of the spinneret (1) so that the additive (12) passes through the channel (12). 9) in the region of the fiber guiding element (18) can be brought into contact with the fiber structure (3) introduced into the spinneret (1) via the fiber guiding element (18). Spinning station according to the preceding claim, characterized in that the attachment (10) has an end section (19) which surrounds the channel outlet (17) and is fixed in the region of the fiber guiding element (18), preferably on the fiber guiding element (18). Spinning station according to the preceding claim, characterized in that the end portion (19) is at least partially annular and, preferably form-fitting, is fixed to a holding portion (20), wherein the holding portion (20) is preferably at least partially annular. Spinning station according to claim 7, characterized in that the holding section (20) at least partially surrounds or is formed by the fiber guiding element (18). Spinning station according to claim 7 or 8, characterized in that the holding section (20) is part of the attachment (10), wherein the holding section (20) is connected to a base body (16) of the attachment (10), preferably releasably, and in particular, at least partially, made of a different material than the article (10). Spinning station according to one of claims 7 to 9, characterized in that the holding portion (20) has a channel portion (21) which opens into the inlet (4) of the spinneret (1), wherein the channel portion (21) of the holding portion (20). is preferably directed against a transport direction (T) of the introduced into the spinneret (1) fiber assembly (3). Spinning station according to one of the preceding claims, characterized in that the attachment (10) is at least partially fixed to a spinning air inlet element (15) of the spinneret (1). Spinning station according to one of claims 4 to 11, characterized in that the channel (12) of the attachment (10) within the attachment (10) at least partially has a curved or kinked course. Attachment for fixing to a spinneret (1) of an air-spinning machine, wherein the spinneret (1) serves to produce a yarn (2) from a fiber structure (3) fed to the spinneret (1), - wherein the spinneret (1) has an inlet (4) for the fiber structure (3), an internal vortex chamber (5), - A in the vortex chamber (5) protruding Garnbildungselement (6) and having an outlet (7) for the yarn (2) produced inside the swirl chamber (5),
characterized in that - the attachment (10) has at least one, preferably inner, channel (12) with a channel inlet (13) and a channel outlet (17), via which an additive (9) provided by an additive supply line (14) after fixing of the attachment ( 10) can be fed to the spinneret (1) of the spinneret (1). An attachment according to the preceding claim, characterized in that the attachment (10) has an end portion (19) comprising the channel outlet (17), the end portion (19) being preferably at least partially annular, and wherein the end portion (19) comprises a retaining portion (20), which preferably can be fixed in the region of the inlet (4) of the spinneret (1) to the spinneret (1), preferably in a form-fitting manner. Attachment according to claim 13 or 14, characterized in that the channel (12) of the attachment (10) within the attachment (10) at least in sections has a bent or kinked course.

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