DE102017113257A1 - Working point of an air-jet spinning machine and method for opening a spinneret - Google Patents

Abstract

The invention relates to a workstation of an air-jet spinning machine with a spinneret (1) for producing a yarn (2) from a fiber strand (3) fed to the spinneret (1), the spinneret (1) having an internal swirl chamber (4) and an inlet ( 5) for the fiber structure (3), wherein the spinneret (1) has a yarn formation element (6) extending at least partially into the swirl chamber (4), wherein the spinneret (1) comprises air nozzles (7) via the air into the Vortex chamber (4) can be introduced in order to impart rotation to the fiber structure (3) in the region of the yarn formation element (6), wherein the spinneret (1) has an outlet (8) via which the yarn (2) is removed from the vortex chamber (4 ), wherein the spinneret (1) comprises at least two spinneret sections (9; 10) delimiting the vortex chamber (4), wherein a first spinneret section (9) of the at least two spinneret sections (9; 10) forms the inlet (5). for the Faserverba nd (3) and a second spinneret section (10) of the at least two spinneret sections (9; 10) has the outlet (8) for the yarn (2), and wherein the second spinneret section (10) is mounted such that it can be moved relative to the first spinneret section (9) and at least partially linearly from a closed position to an open position wherein the Garnbildungselement (6) is accessible and cleanable in the open position for an operator. According to the invention, it is provided that the first spinneret section (9) is mounted such that it can be moved away from the second spinneret section (10) starting from a basic position in order to further increase the accessibility of the yarn-forming element (6). Furthermore, a method for opening a spinneret (1) of an air-spinning machine is provided.

Description

The present invention relates to a work station of an air spinning machine with a spinneret for producing a yarn from a fiber strand fed to the spinneret, the spinneret having an internal swirl chamber and an inlet for the fiber strand. Furthermore, the spinneret comprises a yarn formation element extending at least partially into the swirl chamber, wherein the spinneret moreover has air nozzles through which air can be introduced into the swirl chamber in order to impart rotation to the fiber structure in the region of the yarn formation element. The spinneret has an outlet over which the yarn is removable from the swirl chamber. The spinnerette further includes at least two spinnerette sections delimiting outwardly of the swirl chamber, wherein a first spinneret section of the at least two spinneret sections has the inlet for the fiber strand and a second spinneret section of the at least two spinneret sections has the outlet for the yarn, and wherein the second spinneret section is supported in that it can be moved linearly from a closed position into an open position relative to the first spinneret section and in this case at least partially, wherein the yarn-forming element is accessible and can be cleaned by an operator in the open position.

Further described is a method for opening a spinneret of an air-jet spinning machine, which serves to produce a yarn from a fiber structure by means of an air flow, the spinneret having at least a first spinneret section with an inlet for the fiber strand and a second spinneret section with an outlet for the yarn wherein the first spinneret section and the second spinneret section delimit an internal swirl chamber to the outside, the spinneret comprising a yarn formation element projecting into the swirl chamber, the second spinneret section being linearly opening from a closed position into a first spinneret section during opening and at least partially Open position is moved, and wherein the Garnbildungselement is accessible and cleanable in the open position of the second spinneret section for an operator.

Generic spinnerets are used to produce a yarn from an elongated fiber structure by means of a vortex air flow generated by corresponding air nozzles within the vortex chamber. The outer fibers of the fiber composite are in this case wound in the region of an inlet opening of the generally spindle-shaped Garnbildelements around the inner fibers (core fibers), so that in the result a yarn is formed, which finally withdrawn via the withdrawal channel of Garnbildungselements from the vortex chamber and with the aid of a winding device can be wound on a sleeve.

To be able to clean the interior of the spinneret, in particular the Garnbildungselement, manually or with the aid of automatic handling devices after a stop of the yarn production, there are already proposals to form the vortex chamber surrounding the spinneret in several parts. The individual housing sections are in this case mounted to be movable relative to one another, so that the housing can be opened by moving one or more housing sections. After opening, the interior of the spinneret is accessible and can be freed of deposits (avivage, honeydew, etc.).

There are already various opening mechanisms known (see, for example, the EP 2 573 220 A2 or the DE 10 2015 100 825 A1 ).

The object of the present invention is therefore to improve a generic spinneret and to propose an improved method for opening a spinneret.

The object is achieved by a job and a method with the features of the independent claims.

According to the invention, the workstation is characterized in that the first spinneret section is mounted in such a way that it can be moved away from the second spinneret section starting from a basic position. The accessibility of the yarn-forming element is thereby further increased, in particular if the second spinneret section is already in its open position. Thus, the first spinnerette section may be moved before or after the first spinneret section is moved to its open position or while being transferred thereinto. The movements of the two spinneret sections may be coupled together or independently possible.

In any case, it is provided that both spinneret sections are movable from a starting position to a second position in order to expose the interior of the spinneret, in particular the yarn-forming element, as far as possible and thus to maximize the accessibility from the outside.

The first and / or the second spinneret section are preferably movably mounted on a carrier of the spinneret (eg via one or more rails or one or more pivot axes). Preferably both can Spinneret sections are moved independently or coupled to each other relative to the carrier. Preferably, the Garnbildungselement is part of the second spinneret section.

In any case, there are a plurality of spinneret sections that are movably supported relative to one another. If the second spinneret section is moved into its open position and the first spinneret section is moved from its basic position to a position deviating therefrom, then the yarn-forming element or the vortex chamber can be cleaned from the outside manually or with the aid of a cleaning device.

Furthermore, it brings advantages when the spinneret is mounted in such a way that, in particular by pivoting, it can be moved back and forth between at least two positions. In this case, so the spinneret can be moved as a whole. The storage of the spinneret and the two spinneret sections can be designed such that the first spinneret section can be moved starting from its basic position in a deviating position or moves automatically by a corresponding guide when the spinneret is moved as a whole.

Additionally or alternatively, it is also conceivable that the second spinneret section can be moved from its firing position into its open position or moves automatically by a corresponding guide when the spinneret is moved as a whole. Both spinneret sections can thus be moved once as part of the spinneret moving as a whole in a common direction. In addition, a separate movement of each spinneret section is possible.

Preferably, the spinneret has at least one guide or is operatively associated with one that effects movement of the second spinneret section when or after the spinneret is moved as a whole, preferably pivoted. The movement of the spinneret as a whole is preferably carried out with a pneumatic or electrically operating actuator. It is also advantageous if the second spinneret section moves automatically relative to the above-mentioned carrier and / or to the first spinneret section when the spinneret is moved as a whole. This can be realized by one or more corresponding guides and / or scenes.

It is particularly advantageous if the first and / or the second spinneret section are mounted such that the first spinneret section can be pivoted exclusively relative to the second spinneret section. The movement may be by one or more pivot axes, z. B. in the form of bolts, be predetermined.

The first spinneret section is preferably mounted on the carrier via one or more pivot axes, on which the second spinneret section is also mounted and preferably displaceable via one or more guides.

Preferably, the second spinneret section can be displaced exclusively relative to the first spinneret section. Preferably, the bearing of the spinneret and the two spinneret sections is such that the entire spinneret is pivotable about a pivot axis, that the second spinneret section pivots as part of the spinneret during its pivoting and can also be moved relative to the first spinneret section. Finally, it is advantageous if the first spinneret section can be pivoted as part of the spinneret during its pivoting and additionally pivoted relative to the second spinneret section. The pivot axis about which the spinneret as a whole is pivotable and the pivot axis about which the first spinneret section is pivotable are preferably in the form of separate pivot axes. The two pivot axes preferably do not run collinear and in particular parallel.

It is likewise advantageous if the first spinneret section and also the second spinneret section are mounted on a common carrier. The carrier is preferably pivotable about one of the aforementioned pivot axes and fastened via one or more pivot pins or pivot pin receptacles to a preferably stationary and / or rigidly mounted holding section of the spinneret or a holding section of the workstation or spinning machine. In particular, it is provided that the inlet and the outlet move in different directions relative to the carrier when the first and the second spinneret section are moved from a spinning position to a maintenance position. In the spinning position, the second spinneret section assumes its closed position and the first spinneret section assumes its basic position.

It is advantageous if the second spinneret section has a sleeve-shaped section which at least partially surrounds the yarn-forming element. In addition, the sleeve-shaped portion should be in contact with the first spinneret section and in this case at least partially complete the vortex chamber outwardly when the first spinneret section is in its home position and the second spinneret section is in its closed position.

In particular, the sleeve-shaped portion may be formed substantially cupped or bell-shaped. Said portion is preferably spaced at least in the region from the yarn forming member in contact with the first spinneret portion when the first spinneret portion is in its home position and the second spinneret portion is in its closed position. By the distance a free space is limited, which represents the vortex chamber or mitbildet.

It is also advantageous if the sleeve-shaped section at least partially surrounds the yarn-forming element in an annular manner and, together with the yarn-forming element, delimits the vortex chamber. Preferably, the sleeve-shaped portion has at least partially the shape of a cylinder wall. The swirling chamber is preferably delimited by the sleeve-shaped section, a section of the second spinneret section extending therebetween and the yarn-forming element and the first spinneret section when the spinneret assumes the abovementioned spinning position.

It is also advantageous if the sleeve-shaped portion has at least one cutout or aperture through which air can flow out of the vortex chamber when the first spinneret section is in its home position and the second spinneret section is in its closed position. The cutout is preferably delimited by the sleeve-shaped section and the first spinneret section when the spinneret has its spinning position. In this position, the cutout or the alternatively present opening borders on an air outlet (eg an air suction), which may be formed by a pipe section, which in turn may be connected to a vacuum source of the air spinning machine.

Likewise, it is advantageous if the first spinneret section with the second spinneret section and / or the first spinneret section and / or the second spinneret section are in form-locking contact with a carrier of the spinneret in such a way that the first and / or second spinneret section is rotated about a central axis of a spinneret section the exhaust duct having the outlet is prevented. The first and the second spinneret section can thus be installed only in a predetermined position in the workplace. In particular, the second spinneret section should, at least in its closed position, preferably also in its open position, be positively connected to the carrier. The positive connection should be designed such that the cutout or the opening of the second spinneret section is always located at the same location when the second spinneret section assumes its closed position. The cutout or the aperture should always be aligned in this position to the air outlet that air from the air outlet can flow out of the vortex chamber.

Particular advantages it brings with it when the first spinneret section is mounted on the second spinneret or a support of the spinneret or a holding portion of the job or is fixed such that it completely from the second spinneret section or from its basic position and after release of at least one fastener from the second spinneret Carrier is detachable. The first spinneret section can therefore preferably be completely removed from the workstation. This causes a particularly good accessibility of the vortex chamber. In addition, the removal of the first spinneret section or the release of the at least one fastening means should be releasable manually and without the use of tools. Conceivable, for example, fasteners in the form of one or more detent or clip connections or nuts that can be solved manually (eg., Wing nuts).

Furthermore, it is advantageous if a seal is arranged between the first spinneret section and the second spinneret section. If the spinneret has the abovementioned spinning position, then the two spinneret sections are pressed against one another, wherein the seal is located between the spinneret sections and prevents an undesired escape of air when air is introduced into the vortex chamber via the air nozzles.

It is advantageous if the first spinneret section with an actuator, such as a pneumatic cylinder, or a power storage, for. B. a tension or compression spring, is operatively connected, which presses or pulls the first spinneret portion during a spinning operation of the work against the second spinneret or the said seal. The vortex chamber is thus sealed to the outside, wherein the spinneret may have an air outlet through which air introduced via the air nozzles can emerge again from the spinneret. Incidentally, an escape of air can also take place through the outlet and / or inlet of the spinneret.

Preferably, the first spinneret portion can be moved manually against the force of the actuator from its normal position to a position deviating therefrom, e.g. B. be pivoted. If no or only a small amount of manual force is exerted on the first spinneret section, then it will pick up again due to the force exerted by the actuator Basic position and is in this case pressed or pulled against the second spinneret section. Furthermore, a corresponding actuator can be present, which is designed to pivot the spinneret as a whole between two positions.

The inventive method for opening a spinneret comprising at least two spinneret sections of an air-spinning machine is characterized in that the second spinneret section is mounted such that it can be moved from a closed position to an open position relative to the first spinneret section. The movement takes place here at least in sections linearly. In addition, the Garnbildungselement is accessible and cleanable in the open position for an operator. Furthermore, it is provided that the first spinneret section is moved away from the second spinneret section during opening, starting from a basic position, in order to further increase the accessibility of the yarn-forming element.

Thus, the spinneret can be opened by the movement of at least the first and second spinneret sections to remove contaminants within the spinneret. Preferably, the second spinneret section is displaced exclusively linearly relative to the first spinneret section. The spinneret can therefore be opened by moving both spinneret sections in different ways.

Incidentally, the spinneret may have one or more of the features mentioned above or below.

It is also advantageous if the spinneret moves in the course of opening the spinneret beyond, preferably pivoted, is. The spinneret is therefore moved when opened as a whole, while additionally moving the two spinneret sections as described above. As a result, therefore, preferably the second spinneret section is pivoted as part of the spinneret and then moved linearly or in the course of the pivoting. The first spinneret section is also pivoted as part of the spinneret about a first pivot axis and then moved separately or subsequently in the course of this pivoting.

Furthermore, it is advantageous if the first spinneret section is pivoted during opening, starting from its basic position relative to the second spinneret section. Preferably, the first spinneret section is exclusively pivotable relative to the second spinneret section. Preferably, the pivoting of the first spinneret section takes place about a different pivot axis than the pivoting of the spinneret as a whole. Both pivot axes are preferably parallel.

It also has advantages when, during the opening of the spinneret, the second spinneret section is first moved and the first spinneret section is moved after the start or completion of this movement, thereby increasing the spinneret opening degree with each movement. The movement of the first spinnerette section preferably occurs after the movement of the second spinneret section is completed. Preferably, the second spinneret section is moved while the spinneret is pivoted as a whole.

• 1 einen Querschnitt durch eine bekannte Spinndüse sowie ein Walzenpaar eines vorgelagerten Streckwerks,
• 2 eine Seitenansicht einer erfindungsgemäß ausgebildeten Spinndüse,
• 3 die Spinndüse gemäß 2 mit verschwenkter Spinndüse,
• 4 die Spinndüse gemäß 3 mit verschobenem zweiten Spinndüsenabschnitt,
• 5 die Spinndüse gemäß 4 mit verschwenktem ersten Spinndüsenabschnitt, und
• 6 eine perspektivische Ansicht des zweiten Spinndüsenabschnitts einer erfindungsgemäßen Spinndüse.

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

• 1 a cross section through a known spinneret and a roller pair of an upstream drafting system,
• 2 a side view of an inventively designed spinneret,
• 3 the spinneret according to 2 with pivoted spinneret,
• 4 the spinneret according to 3 with shifted second spinneret section,
• 5 the spinneret according to 4 with pivoted first spinneret section, and
• 6 a perspective view of the second spinneret section of a spinneret according to the invention.

1 shows a section 13 a spinning station of an air-jet spinning machine according to the invention (wherein the air-spinning machine can of course have a plurality of, preferably adjacent to each other, work stations). If necessary, the workplace can have a drafting system with several roller pairs 18 , of which only one is shown, which comprise a fiber strand 3 , for example in the form of a relined strip conveyor, is supplied. Furthermore, the work station shown comprises a in 1 detailed and cut spinneret 1 with an internal vortex chamber 4 , in which the fiber structure 3 or at least a part of the fibers of the fiber composite 3 after passing an inlet 5 the spinneret 1 is provided with a rotation.

In addition, the job can be a spinneret 1 downstream pair of take-off rollers and a take-off roller pair downstream winding device for winding the yarn leaving the job 2 on a sleeve. The Work according to the invention need not necessarily have a drafting system. Also, the pair of take-off rollers is not absolutely necessary.

The work site shown generally works by an air spinning process. To the formation of the yarn 2 becomes the fiber bandage 3 over the inlet 5 in the vortex chamber 4 the spinneret 1 guided. There it receives a rotation, ie at least part of the free fiber ends of the fiber composite 3 is caused by a vortex air flow, which is due in one the vortex chamber 4 Surrounding housing wall arranged air nozzles 7 is generated, recorded (with the air nozzles 7 via an air duct 19 in turn, in turn, with an air supply 14 is connected, which is supplied via a compressed air supply with compressed air).

Part of the fibers is hereby made of the fiber structure 3 at least a little bit pulled out and around the front area of one in the vortex chamber 4 protruding Garnbildungselements 6 wound. Because of the fiber structure 3 through an inlet opening 26 the yarn formation element 6 via one within the yarn formation element 6 arranged extraction duct 16 from the vortex chamber 4 and finally over the outlet 8th from the spinneret 1 Finally, the free fiber ends loop as so-called Umwindefasern to the centrally extending core fibers - resulting in a desired rotation having yarn 2 , The over the air nozzles 7 introduced compressed air leaves the spinneret 1 finally via the withdrawal channel 16 and any existing air outlet 25 which can be connected to a source of negative pressure when needed.

Generally it should be made clear at this point that it is the yarn produced 2 basically around any fiber structure 3 can be, which is characterized in that an outer part of the fibers (so-called Umwindefasern) around an inner, preferably untwisted or if necessary also rotated part of the fibers, wrapped around the yarn 2 to give 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 Umwindefasern, or a yarn 2 in which the wraps are looped relatively loosely around the inner core, so that the yarn 2 remains defensible. This is crucial when making the yarn 2 at a subsequent textile machine (for example, a ring spinning machine) should be retracted again with the help of a drafting system or must, in order to be further processed accordingly.

The essence of the present invention can now be the synopsis of 2 to 5 take a schematic diagram of a spinneret 1 show an air-jet spinning machine (the drawing unit, not shown, would be below the spinneret shown in the above figures 1 are located).

In principle, the spinneret comprises 1 at least a first spinneret section 9 and a second spinneret section 10 , which share the internal vortex chamber 4 enclose. Both spinneret sections 9 . 10 are preferably on a common carrier 11 stored, in turn, on a holding section 22 , z. B. a frame member, the job is stored.

Like a comparison of 2 and 3 shows, the spinneret can 1 about her carrier 11 as a whole about a first pivot axis 20 and relative to said holding portion 22 be pivoted.

In addition, there is a movement of the first spinneret section 9 and the second spinneret section 10 in addition to the said pivoting possible. Preferably, the second spinneret section 10 during or after the pivoting of the spinneret 1 along a linear guide, the part of the carrier 11 can be moved linearly.

It is conceivable in this context that the displacement takes place automatically when the spinneret 1 is pivoted. For example, a pneumatic cylinder may be present, which pivoting the spinneret 1 causes. Is the second spinneret section 10 via a linkage or other guide with the holding section 22 connected, so takes place when pivoting the spinneret 1 also a displacement of the second spinneret section 10 ,

In any case, the second spinneret section 10 in an in 4 shown open position movable, preferably linearly displaceable. In this position, the interior of the vortex chamber 4 or the Garnbildungselement 6 already accessible from the outside, so that the areas mentioned can be freed of impurities (eg in the form of fiber residues or finishing agent).

To the accessibility of the interior of the spinneret 1 to further improve, the invention further provides that the first spinneret section 9 relative to the second spinneret section 10 can be moved. Preferably, the first spinneret section 9 via a second pivot axis 21 on the carrier 11 stored and swiveled around this.

In particular, the first spinneret section 9 with an actor 17 in operative connection, which exerts a force on the first spinneret section 9 exercises him without further external force in the in 4 shown basic position moves or stops there. In the 2 to 5 is the actor 17 indicated as a spiral spring.

Now a force against by the actor 17 generated force on the first spinneret section 9 exercised (eg manually), this pivots in the in 5 shown position. The spinneret 1 is now particularly wide open, allowing the cleaning of the interior of the spinneret 1 is further simplified.

An advantageous embodiment of the second spinneret section 10 is in 6 not all features, such as possible bearing or guide elements, are shown.

In principle, it is advantageous if the second spinneret section 10 a sleeve-shaped section 12 which points in the direction of an inlet opening 26 the yarn formation element 6 to which the withdrawal channel 16 connects, is open. The sleeve-shaped section 12 thus delimits laterally a cavity shown in black, the part of the vortex chamber 4 is when the second spinneret section 10 at the first spinneret section 9 according to 2 is applied.

The sleeve-shaped section 12 can a section 13 have, over the air from the spinneret 1 in her in 2 escape shown position or can be sucked off. This air finally passes through a 1 indicated air outlet 25 from the vortex chamber 4 , which is advantageous because when spinning constantly air over the air nozzles 7 in the vortex chamber 4 flows.

Finally shows 6 in that the second spinneret section 10 an anti-rotation, for example in the form of the bulge shown 23 , which may be in a depression of the wearer 11 engages when the second spinneret section 10 relative to the central axis 15 the exhaust duct 16 properly mounted. The anti-rotation thus ensures that the cutout 13 always in the area of the air outlet 25 lies when the spinneret 1 assembled or assembled.

Finally shows 6 in that the second spinneret section 10 a seal 24 over which it is at the first spinneret section 9 sealingly abuts when both spinneret sections 9 . 10 in the 2 take position shown. Of course, the seal 24 also in the area of the first spinneret section 9 be placed.

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 specification or the claims or in different embodiments, provided that no contradiction arises to the teaching of the independent claims.

LIST OF REFERENCE NUMBERS

1

spinneret

2

yarn

3

fiber structure

4

swirl chamber

5

Inlet of the spinneret

6

Garnbildungselement

7

air nozzle

8th

Outlet of the spinneret

9

first spinneret section

10

second spinneret section

11

carrier

12

sleeve-shaped section

13

neckline

14

air supply

15

Center axis of the exhaust duct

16

culvert

17

actuator

18

roller pair

19

air duct

20

first pivot axis

21

second pivot axis

22

holding section

23

bulge

24

poetry

25

air outlet

26

Inlet opening of Garnbildungselements

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2573220 A2 [0005]
• DE 102015100825 A1 [0005]

Claims (15)

Working point of an air spinning machine with a spinneret (1) for producing a yarn (2) from a fiber strand (3) fed to the spinneret (1), wherein the spinneret (1) has an internal vortex chamber (4) and an inlet (5) for the fiber structure (3), wherein the spinneret (1) has a yarn formation element (6) extending at least partially into the swirl chamber (4), wherein the spinneret (1) comprises air nozzles (7) via the air into the swirl chamber (4) can be introduced in order to impart rotation to the fiber structure (3) in the region of the yarn formation element (6), the spinneret (1) having an outlet (8) through which the yarn (2) is removed from the vortex chamber (4 ), wherein the spinneret (1) comprises at least two spinneret sections (9; 10) delimiting the vortex chamber (4), - a first spinneret section (9) of the at least two spinneret sections (9; 5) for the fiber structure (3) and a z further spinneret section (10) of the at least two spinneret sections (9; 10) has the outlet (8) for the yarn (2), and - wherein the second spinneret section (10) is mounted such that it is moved relative to the first spinneret section (9) and at least partially linearly from a closed position to an open position can, wherein the Garnbildungselement (6) in the open position for an operator accessible and cleanable, characterized in that the first spinneret section (9) is mounted so that it can be moved away from a basic position of the second spinneret section (10) to to further increase the accessibility of the yarn forming element (6). Workstation according to the preceding claim, characterized in that the spinneret (1) is mounted such that, in particular by pivoting, between at least two positions back and forth. Workstation according to one of the preceding claims, characterized in that the first spinneret section (9) and / or the second spinneret section (10) are mounted such that the first spinneret section (9) can be pivoted relative to the second spinneret section (10) exclusively and / or or that the second spinneret section (10) can be displaced exclusively relative to the first spinneret section (9). Workstation according to one of the preceding claims, characterized in that the first spinneret section (9) and the second spinneret section (10) are mounted on a common support (11), the first spinneret section (9) and the second spinneret section (10) starting from a spinning position, in which the second spinneret section (10) is in its closed position and the first spinneret section (9) is in its basic position, are movable such that the inlet (5) and the outlet (8) relative to the carrier (11) move in different directions. Workstation according to one of the preceding claims, characterized in that the second spinneret section (10) has a sleeve-shaped section (12) which at least partially surrounds the yarn-forming element (6) and which is in contact with the first spinneret section (9) and in this case the swirl chamber (4) closes off at least in sections, when the first spinneret section (9) is in its basic position and the second spinneret section (10) is in its closed position. Workstation according to the preceding claim, characterized in that the sleeve-shaped portion (12) surrounds the Garnbildungselement (6) at least partially annular and here together with the Garnbildungselement (6) limits the vortex chamber (4). Job according to Claim 5 or 6 , characterized in that the sleeve-shaped portion (12) has at least one cutout (13) or an opening through which or via the air from the vortex chamber (4) can flow out when the first spinneret section (9) in its normal position and the second spinneret section (10) is in its closed position. Workstation according to one of the preceding claims, characterized in that the first spinneret section (9) with the second spinneret section (10) and / or the first spinneret section (9) and / or the second spinneret section (10) with a carrier (11) of the spinneret (1) are in such a form-fitting contact that a rotation of the first spinneret section (9) and / or the second spinneret section (10) about a central axis (15) of the outlet (8) having discharge duct (16) is prevented. Workstation according to one of the preceding claims, characterized in that the first spinneret section (9) on the second spinneret section (10) or a support (11) of the spinneret (1) or a holding section (22) of Work is stored or is fixed in such a way that it is completely detachable from the second spinneret section (10) or from the carrier (11) starting from its basic position and after releasing at least one fastener, the at least one fastener manually and without the use of tools solvable is. Workstation according to one of the preceding claims, characterized in that a seal (24) is arranged between the first spinneret section (9) and the second spinneret section (10). Workstation according to one of the preceding claims, characterized in that the first spinneret section (9) with an actuator (17), for example a pneumatic cylinder, or a force storage device, for. B. a spring, is operatively connected, which presses or pulls the first spinneret section (9) during a spinning operation of the work against the second spinneret section (10). Method for opening a spinneret (1) of an air-jet spinning machine, which serves to produce a yarn (2) from a fiber structure (3) by means of an air flow, in particular a spinneret (1) according to one of the preceding claims, - the spinneret (1) at least one first spinneret section (9) with an inlet (5) for the fiber structure (3) and a second spinneret section (10) with an outlet (8) for the yarn (2), wherein the first spinneret section (9) and the second spinneret section (10) delimiting an internal swirl chamber (4) towards the outside, - wherein the spinneret (1) comprises a yarn formation element (6) projecting into the swirl chamber (4), the second spinneret section (10) being open during opening relative to first spinneret section (9) and here at least partially linearly moved from a closed position to an open position, and - wherein the Garnbildungselement (6) in the open position of the second Spinneret section (10) is accessible and cleanable for an operator, characterized in that the first spinneret section (9) is moved away from the second spinneret section (10) during opening from a home position to further increase the accessibility of the yarn forming element (6). Method according to the preceding claim, characterized in that the spinneret (1) in addition in the course of opening the spinneret (1) moves, preferably pivoted, is. Method according to Claim 12 or 13 , characterized in that the first spinneret section (9) is pivoted during opening, starting from its basic position relative to the second spinneret section (10). Method according to one of Claims 12 to 14 characterized in that, during the opening of the spinneret (1), first the second spinneret section (10) moves and after commencement or completion of this movement the first spinneret section (9) is moved, the opening degree of the spinneret (1) at each movement is enlarged.

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