EP3181741A1 - Air jet spinning machine and method for operating the same - Google Patents

Abstract

The invention relates to a method for operating an air spinning machine having a plurality of spinning stations (1), each spinning station (1) comprising at least one spinneret (2) with an internal swirl chamber (6), wherein the spinneret (2) during operation of the spinning station (1 ) a fiber strand (4) via an inlet (5) of the spinneret (2) is supplied, wherein the spinneret (2) has a plurality in the vortex chamber (6) opening air nozzles (9) via which during operation of the air spinning machine compressed air in the Vortex chamber (6) flows in to generate a vortex air flow within the vortex chamber (6), the fiber structure (4) within the vortex chamber (6) being rotated by means of the vortex air flow so that a yarn (3 ), which finally leaves the spinneret (2) via an outlet (8), and wherein the air-spinning machine has an additive supply (10) with the aid of which during the operation of the air-spinning machine at least a portion of the spinning stations (1) at least temporarily an additive (11) is supplied. According to the invention, it is proposed that a liquid additive (11) is used, wherein the additive (11) is degassed before leaving the additive supply (10). In addition, an air-jet spinning machine with a degassing device (12) will be described.

Description

The present invention relates to a method for operating an air spinning machine having a plurality of spinning stations, wherein each spinning station comprises at least one spinneret with an internal swirl chamber, wherein the spinneret is supplied to a fiber strand via an inlet during operation of the spinning station, wherein the spinneret more in the swirl chamber emptying Comprises compressed air nozzles, during which the compressed air flows into the vortex chamber during operation of the air-spinning machine to generate a vortex air flow within the vortex chamber, wherein the fiber structure within the vortex chamber with the aid of the vortex air flow receives a rotation, so that from the fiber strand a yarn is formed, the Finally, the spinneret leaves via an outlet, and wherein the air-spinning machine has an additive supply, with the aid of which an additive is at least temporarily supplied to at least part of the spinning stations during operation of the air-spinning machine.

Furthermore, an air spinning machine having a plurality of spinning stations is described, wherein each spinning station comprises at least one spinneret, which serves to produce a yarn from a fiber bond supplied 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 an outlet for the yarn produced inside the swirl chamber, the spinneret having a plurality of air nozzles opening into the swirl chamber through which compressed air flows into the swirl chamber during operation of the air spinning machine to create a swirling air flow within the swirl chamber, and wherein the Air-jet spinning machine has an additive supply, which is formed, at least To provide a part of the spinning stations at least temporarily with a liquid additive.

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.

For the purposes of the invention, the term yarn is thus generally understood to mean a fiber structure in which at least some of the fibers are wound around an inner core. 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 processing of man-made fibers, for example polyesters, or blends of natural and man-made fibers, deposits are formed, in particular on the surface of the yarn-forming element. The reason for this is the fact that the production of chemical fibers is a so-called preparation the continuous fibers during the manufacturing process comprises. In this case, a spin finish, usually an oil 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.

Thus, 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 spindles are predominantly used with an internal exhaust duct. 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 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 to maintain a consistent Quality of the spun yarns to maintain.

The cleaning of the surfaces of Garnbildungselementes, the Spinndüseninnenraumes 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 failure.

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 is guided by the compressed air to the Garnbildungselement and causes a cleaning of the surface of 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.

Moreover, it is known to add additive to the fiber structure in order to improve the properties of the yarn produced therefrom, for example with regard to its hairiness, strength, elongation and yarn uniformity, wherein the dosage should be particularly precisely controllable in order to prevent individual fiber strand sections is applied more or less than the predetermined additive target amount.

In particular, the dosage mentioned is in practice - regardless of the purpose of the additive addition - not always completely unproblematic because the additive of the respective spinning station is supplied with very low volume or mass flows.

Object of the present invention is therefore to propose a method and an air spinning machine, with the help of a particularly accurate and reproducible dosing of an additive is possible.

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

According to the invention, the method for operating an air spinning machine is now characterized by the fact that a liquid additive is used, wherein the additive is degassed before leaving the additive supply. The additive supply preferably comprises a line system connected to an additive tank, via which the additive is supplied to the individual spinning stations. The additive tank may be, for example, a container partially filled with additive, in which additional compressed air may be present, so that the additive is moved through the line system by the air pressure present in the container. Furthermore, the additive supply preferably comprises individual additive nozzles or other openings fed with additive by the conduit system, via which the additive leaves the additive supply and individual regions of the spinning station (such as the yarn formation element or the above-mentioned fiber guiding element) on the fiber structure, the yarn produced therefrom. or get into the air nozzles. In any case, it is provided that the additive is partially or completely freed of gas present in the additive before it leaves the additive supply. This reliably prevents fluctuations in the volume or mass flow of the additive leaving the additive supply, since the additive stream can not be interrupted by gas bubbles forming in the additive supply. Preferably, at least 80%, preferably at least 90%, more preferably at least 95%, of the additive in the additive prior to degassing Exists existing gas during degassing, so that the additive contains as little or no gas at all when leaving the additive supply or the passage of the above-mentioned openings.

Incidentally, it is advantageous if each of the spinning stations or at least a major part thereof during the yarn at least temporarily an additive is supplied, preferably each spinning station comprises at least its own metering unit, which is part of the additive supply of the air spinning machine and on the additive, the additive supply leaves in a defined mass or volume flow. In particular, the additive should be degassed in this case before it reaches the area of the respective metering unit.

In essence, the invention therefore provides that the gas dissolved in the additive used is removed as far as possible on the additive in order to ensure a constant metering of the additive when leaving the additive supply or passing through the corresponding metering unit.

In particular, it is advantageous if the additive is degassed with the aid of a degassing device of the air spinning machine and thus on site. The additive is thus filled in the additive supply, preferably in the abovementioned additive tank, and only then degassed by means of the air-spinning machine itself, ie freed as completely as possible from gas dissolved in the additive. With regard to possible features of the degassing device used, reference is made to the following description. In particular, the additive should be degassed shortly before leaving the additive supply or shortly before passing through the corresponding metering unit. For example, it would be conceivable that the additive is degassed and at the latest after an hour, preferably at the latest after 15 minutes, leaves the additive supply and thereby impinges on the yarn, the fiber structure or one or more sections of the spinning station.

The spinning station includes, besides the spinneret preferably a drafting device upstream of the spinneret for stretching the fiber strand, a downstream of the spinneret deduction device for deduction of the yarn from the spinneret and a winding device for winding the yarn. Preferably, all spinning stations are constructed the same.

It is also extremely advantageous if the additive is degassed at a central location and then forwarded to the individual spinning stations. In this case, the air-spinning machine only has to have a degassing device with the aid of which the additive fed to the spinning stations can be degassed. Of course, it is also possible to use a plurality of degassing devices which are distributed over the spinning station or are all arranged at one point, wherein a degassing device preferably degasses the additive for a plurality of spinning stations.

It is also advantageous if the additive is degassed by being subjected to negative pressure. For example, the absolute pressure within said additive tank could be lowered below 1 bar, preferably below 0.8 bar, to effect degassing of the additive. It would also be possible to integrate a degassing device into said additive supply line system which contains at least one semi-permeable membrane which is permeable to the gas present in the additive but impermeable to the corresponding liquid fraction of the additive. If, on the side of the membrane opposite the additive, a pressure is applied which is smaller than the pressure acting on the additive, then the gas molecules leave the additive and migrate through the membrane onto the side of the additive facing away from the additive. The additive can thus be guided past a semipermeable membrane which comes into direct contact with the additive, the side facing away from the additive being exposed to a lower pressure than the side facing the additive. The pressure difference eventually leads to a degassing of the additive, wherein the escaping gas can leave the degasser over the membrane.

Alternatively or additionally, it is also conceivable for the additive to be admixed with a substance which is preferably present as powder or liquid in order to expel the gas dissolved therein from the additive, ie to degas the additive. For example, it would be conceivable to add to the additive, preferably at a central location (ie prior to splitting the additive to the individual spinning stations), sodium sulfite (Na ₂ SO ₃ ) at a concentration of between 0.1 grams per liter of additive and 1.0 grams per liter Add additive. Likewise, the degassing by means of ultrasound or heating of the additive would be conceivable, since this also contained in the additive gas can be expelled from the additive.

It is advantageous if at least a portion of the additive of the degassing device is supplied several times before it is forwarded to the spinning stations. As a result, the amount of gas removed from the additive can be increased compared to a likewise possible method in which the additive only passes the additive degassing once. Finally, it is also conceivable that a part of the additive supplied to the additive is supplied to the spinning stations after a single degassing, while another part of the additive passes through the degassing device several times.

Moreover, it is advantageous if at least part of the additive contained in the additive supply circulates within a loop system of the additive supply of the air-spinning machine until it is fed to one of the spinning stations. From the loop system can branch off several supply lines, which finally connect the loop system with the individual spinning stations. If an additive molecule now passes one of the supply lines without entering it (eg because no additive requirement and thus no additive consumption currently prevail at the corresponding spinning station), it is transported on in the loop system for as long as until it enters one of the subsequent supply lines and finally the associated spinning station can be supplied.

Preferably, the additive within the loop system is continuously kept moving during operation of the air spinning machine, i. by means of a pump arrangement and / or by means prevailing in the additive tank overpressure by the additive supply, in particular the said loop system, transported. It is also advantageous if the additive flows through the degassing device continuously.

It has special advantages when water is used as an additive. Likewise, of course, another liquid is conceivable, which may be aqueous or oil-based.

The air spinning machine according to the invention, which comprises a plurality of spinning stations mentioned in the preamble of the independent device claim, further comprises a degassing device, with the help of which the used additive can be degassed before leaving the additive supply, i. is degassable. The degassing device (of which several may also be present) is thus part of the air-spinning machine, so that the additive used on site, i. on or through the air-spinning machine itself, can be degassed. The degassing device is designed to remove at least part of the gas dissolved in the additive from the additive, before the additive is fed to the spinning stations and metered accordingly there. In this case, the metering is not adversely affected by gas present in the additive or gas bubbles forming therefrom, so that a particularly accurate and reproducible metering at the individual spinning stations is possible.

It is advantageous if the degassing device is designed to pressurize the additive with a negative pressure. The degassing device is thus capable of the pressure of a region through which the additive flows to reduce the degassing device relative to the ambient air pressure prevailing in the area of the air-spinning machine, so that the gas dissolved in the additive emerges from the additive and can be removed. For this purpose, the degassing device preferably comprises a membrane (which may in particular comprise a plurality of membrane sections) which is impassable for the additive but passable for the gas dissolved therein. If the pressure on the side of the membrane facing away from the additive is reduced compared with the pressure on the side of the membrane facing the additive, a pressure gradient results, which results in the gas dissolved in the additive passing through the membrane and thus being removed from the additive. Alternatively, it would also be conceivable that the degassing device comprises an ultrasound unit with the aid of which the additive can be degassed by means of ultrasound. Finally, the degassing could also take place by heating the additive, wherein the degassing device should have a heat source in operative connection with the additive for this purpose.

It also brings advantages when the degassing device has a metering device, with the aid of which a substance can be fed to the additive, which causes a degassing of the additive. The dosing unit can be designed to supply the substance to the additive in a defined amount (for example in a defined mass flow). It may also be sufficient if the metering device allows only an addition of the substance to the additive, without causing a metered dose. The substance may be, for example, the abovementioned sodium sulfite, it also being possible to use other substances which bring about degassing of the additive.

It is particularly advantageous if the degassing device is integrated into a line system of the air spinning machine, via which the additive can be conducted to the individual spinning stations. The conduit system preferably comprises one or more main conduits communicating with an additive tank, at least one supply conduit branching off per spinning station, via which the additive can finally be fed to the appropriate spinning station. In particular, it is advantageous if the additive supply comprises one or more additive tanks integrated into the line system, which are also preferably subjected to an overpressure with the aid of which the additive is conveyed into and through the line system. In addition, the individual supply lines metering units, for example in the form of metering valves, have to be able to dose the amount of the respective spinning station supplied additive individually at the individual spinning stations.

It is also advantageous if the line system is designed as a loop system, so that additive that is not supplied to one of the spinning stations, in one or more of the above main lines (which are part of the loop system) can be circulated until it over one of a Main line branching supply line is fed to one of the spinning stations. The degassing device (s) and / or the additive tank or tanks are preferably integrated in a main line of the loop system.

Figur 1

einen Ausschnitt einer Spinnstelle einer möglichen Ausführung einer erfindungsgemäßen Luftspinnmaschine, und

Figur 2

ausgewählte Bereiche einer erfindungsgemäßen Luftspinnmaschine.

Further advantages of the invention are described in the following exemplary embodiments. It show, each schematically:

FIG. 1

a section of a spinning station of a possible embodiment of an air-jet spinning machine according to the invention, and

FIG. 2

selected areas of an air-jet spinning machine according to the invention.

FIG. 1 shows a section of a spinning station 1 of an air-jet spinning machine according to the invention (wherein the air-spinning machine can of course have a plurality of spinning stations 1, as in FIG. 2 is shown). The air-spinning machine can, if required, a drafting system with multiple drafting rollers 15 (wherein the drafting rollers 15 may be partially wrapped with a strap 18), which is supplied with a fiber structure 4, for example in the form of a relined tape. Furthermore, the spinning station 1 shown comprises a in FIG. 1 partially cut spinneret 2 with an internal vortex chamber 6, in which the fiber structure 4 or at least a part of the fibers of the fiber composite 4 is provided after passing through an inlet 5 of the spinneret 2 with a rotation (the exact operation of the spinning station 1 will be even closer described).

In addition, the air-spinning machine may have a downstream of the spinneret 2 and e.g. two take-off rolls 23 comprehensive extraction device 16 and a take-off device 16 downstream winding device 17 for winding up the spinning station 1 leaving yarn 3 on a sleeve. The spinning station 1 according to the invention need not necessarily have a drafting system. Also, extraction device 16 is not mandatory.

The spinning station 1 shown generally operates according to an air spinning process. To form the yarn 3, the fiber structure 4 is guided via the inlet 5 into the swirl chamber 6 of the spinneret 2. There it receives a rotation, ie at least part of the free fiber ends of the fiber composite 4 is detected by a vortex air flow, which is generated by appropriately arranged in a vortex chamber surrounding the vortex chamber 6 air nozzles 9. A portion of the fibers is hereby pulled out of the fiber structure 4 at least a little bit and wound around the tip of a projecting into the swirl chamber 6 Garnbildelements 7. As a result of the fact that the fiber structure 4 is drawn off from the spinning nozzle 2 via a withdrawal channel 24 arranged inside the yarn formation element 7 and finally via an outlet 8, the free fiber ends are finally pulled in the direction of the inlet mouth of the yarn formation element 7 and loop in this case as so-called Umwindefasern around the centrally extending core fibers - resulting in the desired rotation having yarn 3. The introduced via the air nozzles 9 compressed air leaves the spinneret 2 finally via the outlet channel 24 and a possibly existing air outlet, which may be connected to a source of negative pressure, if necessary.

In general, it should be made clear at this juncture that the yarn 3 produced can in principle be any fiber structure 4, which is characterized in that an external part of the fibers (so-called binding fibers) around an inner, preferably untwisted or if necessary also rotated Part of the fibers, is wrapped around to give the yarn 3 the desired strength. Also included in the invention is an air-spinning machine with the aid of which an roving, which has already been described in more detail above, can be produced.

According to the present invention, the air-spinning machine now has an additive supply 10, via which the individual spinning stations 1 an additive 11 can be supplied. The spinning stations 1 is preferably each assigned its own dosing unit 25, the in FIG. 1 is shown as the end portion of a supply line 21, wherein the supply line 21 preferably branches off from a main line 22 of the additive supply 10 (s. FIG. 2 in which, for reasons of clarity, only two of the eight supply lines 21 shown are provided with a reference numeral). With the aid of the dosing unit 25, which may comprise, for example, a valve to be passed by the additive 11, finally, the amount of additive 11 supplied per unit time of the spinning station 1, which is basically a liquid, can be determined.

Furthermore, the additive supply 10 should comprise one or more additive tanks 13 providing the additive 11 and one or more main conduits 22 connected thereto and / or from which in turn the individual supply conduits 21 branch off (see FIG. figure 2 ). The additive tank 13 can be a container in which the additive 11 is provided and in which an overpressure prevails with the aid of which the additive 11 is pressed out of the additive tank 13 into the respective main line 22.

Like now FIG. 2 it can be seen, the additive tank 13 is preferably arranged at a location spaced from the spinneret 2 location (for example, on a support or a frame member of the air spinning machine). In addition, the main line 22 may be part of a loop system 19, via which the individual additive molecules circulate until they reach one of the supply lines 21 and are finally fed to the respective spinning station 1.

A collection container 20 for the additive 11 flowing back after passing through the main line (s) 22, in which the additive 11 collects and from which it is finally withdrawn with the aid of a pump 14, can again be present in the ring-line system 19 in order to re-inject an additive tank 13 to be fed.

In order to ensure that the additive 11, which is supplied to the individual spinning stations 1, contains as little as possible or ideally no dissolved gas, the invention provides that the additive 11 before leaving the additive supply 10 and before reaching the corresponding metering unit 25 (if present) degassed, that is completely or at least partially freed from the existing in the additive 11 gas. While the degassing can also be carried out separately, ie without the involvement of an air-spinning machine-specific device, a solution is preferred in which the degassing device 12 is part of the air-spinning machine, as described, for example, in US Pat FIG. 2 is shown.

With regard to possible embodiments of the degassing 12 reference is made to the previous description. In any case, the degassing device should 12 may be integrated into a main line 22 of the additive supply 10, so that the additive 11 is degassed before it enters one of the supply lines 21.

The degassing device 12 is preferably flowed through by the additive 11 and degassed when passing through the degassing device 12. In particular, the additive 11 should continuously pass the degasification system during operation of the air-spinning machine in order to avoid deposits within the degassing device 12. The degassing device is preferably arranged with respect to a flow direction of the additive 11 between an additive tank 13 and a first supply line 21 branching off from the main line 22.

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. 1. spinning station
2. 2. Spinneret
3. 3. Yarn
4. 4. Fiber Association
5. 5th inlet
6. 6. vortex chamber
7. 7. Yarn-forming element
8. 8. outlet
9. 9. Air nozzle
10. 10. Additive supply
11. 11. Additive
12. 12. degassing device
13. 13. Additive tank
14. 14. pump
15. 15. drafting roller
16. 16. Pulling device
17. 17. Winding device
18. 18. Straps
19. 19. Ring line system
20. 20. Collection container
21. 21. Supply line
22. 22nd main line
23. 23. Take-off roller
24. 24. Discharge channel
25. 25. Dosing unit

Claims (15)

Method for operating an air-spinning machine with several spinning stations (1), - each spinning station (1) comprising at least one spinneret (2) with an internal vortex chamber (6), - Wherein the spinneret (2) during operation of the spinning station (1) a fiber strand (4) via an inlet (5) of the spinneret (2) is fed, wherein the spinneret (2) has a plurality of air nozzles (9) which open into the swirl chamber (6) and through which compressed air flows into the swirl chamber (6) during operation of the air spinning machine in order to generate a swirling air flow within the swirl chamber (6). - wherein the fiber structure (4) within the vortex chamber (6) with the aid of the vortex air flow receives a rotation, so that from the fiber strand (4) a yarn (3) is formed, the spinneret (2) finally via an outlet (8) leaves, and - wherein the air spinning machine has an additive supply (10), with the aid of which during the operation of the air-spinning machine at least part of the spinning stations (1) at least temporarily an additive (11) is supplied, characterized
that a liquid additive (11) is used, wherein the additive (11) before leaving the additive supply (10) is degassed. Method according to the preceding claim, characterized in that the additive (11) is degassed on site with the aid of a degassing device (12) of the air-spinning machine. Method according to one of the preceding claims, characterized in that the additive (11) is degassed at a central location and then forwarded to the individual spinning stations (1). Method according to one of the preceding claims, characterized in that the additive (11) is degassed by being subjected to negative pressure. Method according to one of the preceding claims, characterized in that the additive (11) is degassed by adding a substance. Method according to one of the preceding claims, characterized in that at least a part of the additive (11) of the degassing device (12) is supplied several times before it is forwarded to the spinning stations (1). Method according to one of the preceding claims, characterized in that at least a part of the additive (11) circulates within a loop system (19) of the air-spinning machine until it is fed to one of the spinning stations (1). Method according to the preceding claim, characterized in that the additive (11) is continuously kept in motion during operation of the air-spinning machine inside the loop system (19). Method according to one of the preceding claims, characterized in that water is used as additive (11). Air-jet spinning machine with several spinning stations (1), - Wherein each spinning station (1) comprises at least one spinneret (2), the production of a yarn (3) from one of the spinneret (2) supplied Fiber dressing (4) serves - wherein the spinneret (2) has an inlet (5) for the fiber structure (4), an internal vortex chamber (6), - A in the vortex chamber (6) projecting Garnbildungselement (7), and an outlet (8) for the yarn (3) produced inside the swirl chamber (6), - wherein the spinneret (2) has a plurality of in the vortex chamber (6) opening air nozzles (9) via which flows during operation of the air spinning machine compressed air in the vortex chamber (6) to produce within the vortex chamber (6) a vortex air flow, and - wherein the air-spinning machine has an additive supply (10) which is designed to supply at least a part of the spinning stations (1) at least temporarily with a liquid additive (11), characterized
in that the air-spinning machine comprises at least one degassing device (12) with the aid of which the additive (11) used can be degassed before leaving the additive supply (10). Air-jet spinning machine according to the preceding claim, characterized in that the degassing device (12) is designed to apply a negative pressure to the additive (11). Air-jet spinning machine according to claim 10 or 11, characterized in that the degassing device (12) has a metering device with the aid of which a substance can be fed to the additive (11). Air-jet spinning machine according to one of claims 10 to 12, characterized in that the degassing device (12) is integrated into a line system of the air-spinning machine, via which the additive (11) to the individual spinning stations (1) can be conducted. Air-jet spinning machine according to one of claims 10 to 13, characterized in that the line system is designed as a loop system (19), so that additive (11) which is not supplied to one of the spinning stations (1) can be circulated until it reaches one of the spinning stations (1) is supplied. Use of a degassed liquid, preferably in the form of degassed water, as an additive (11) for an air-jet spinning machine.

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