DE102018130826A1 - Spinneret and method for cleaning the same - Google Patents

Abstract

The invention relates to a spinneret (1) for an air spinning machine, the spinneret (1) having an internal vortex chamber (4), which is at least partially bounded towards the outside by a first spinneret section (5) and a second spinneret section (6) the first spinneret section (5) comprises an inlet opening (7) for the fiber structure (3) and a plurality of air nozzles (8) via which air can be introduced into the swirl chamber (4), the spinneret (1) being at least partially in the swirl chamber (4) extending yarn forming element (9) with an inlet (10) for the fiber structure (3) and an outlet (11) for the yarn (2) produced within the swirl chamber (4), and wherein the yarn forming element (9) from the second Spinning nozzle section (6) is held with the aid of a guide (12) and can be moved relative to the second spinning nozzle section (6) between a spinning position and a cleaning position. According to the invention, the first spinneret section (5) is attached to the second spinneret section (6) via at least one pivot axis (13) and can be pivoted about a pivot axis (13) from a closed position to an open position, the inlet (10) of the yarn forming element (9) regardless of the position of the yarn forming element (9) is only accessible to an operator from the outside in the open position.

Description

The present invention relates to a spinneret for an air spinning machine for producing a yarn from a fiber structure supplied to the spinneret, the spinneret having an inner cavity in the form of an internal vortex chamber which is at least partially bounded on the outside by a first spinneret section and a second spinneret section. The spinneret sections are in particular housing sections of the housing which delimits the spinneret towards the outside. The first spinneret section comprises an inlet opening for the strand-like fiber structure and a plurality of air nozzles via which air can be introduced into the swirl chamber. For this purpose, the spinneret is connected to a corresponding compressed air line after installing an air spinning machine. Furthermore, the spinneret comprises a preferably spindle-shaped yarn-forming element that extends at least partially into the swirl chamber, with an inlet for the fiber structure and an outlet for the yarn produced within the swirl chamber in the region of the yarn-forming element during operation of the spinneret. The inlet and the outlet are connected to a discharge channel running inside the yarn formation element. It is further provided that the yarn forming element is held by the second spinneret section with the aid of a guide and is movable between a spinning position and a cleaning position relative to the second spinneret section.

In addition, a method for cleaning a spinneret on an air spinning machine, which is used to produce a yarn from a fiber assembly fed to the spinneret, is proposed, the spinneret in turn having an internal swirl chamber that at least partially outwards from a first spinneret section and a second spinneret section is limited. In this case too, the first spinneret section comprises an inlet opening for the fiber structure and a plurality of air nozzles, via which air is introduced into the swirl chamber during operation of the air nozzle. The spinneret has a yarn-forming element that extends at least partially into the swirl chamber, with an inlet for the fiber structure and an outlet for the yarn produced within the swirl chamber in the region of the yarn-forming element during operation of the spinneret. Finally, the method provides that the yarn-forming element is moved from a spinning position into a cleaning position before or during the opening of the spinneret relative to the second spinneret section.

Generic spinnerets are used to produce a yarn from an elongated fiber structure with the help of a vortex air flow generated by appropriate air nozzles within the vortex chamber. The outer fibers of the fiber assembly are wound around the inner fibers (core fibers) in the area of the inlet of the generally spindle-shaped yarn-forming element, so that a yarn is formed as a result, which is finally drawn off from the swirl chamber via the extraction channel of the yarn-forming element and with the aid of a winding device can be wound on a tube.

In order to be able to clean the inside of the spinneret, in particular the yarn-forming element, manually or also with the aid of automatic handling devices after the yarn production has stopped, proposals have already been made to design the housing of the spinneret surrounding the swirl chamber in several parts. The individual spinneret sections are mounted such that they can move relative to one another, so that the housing can be opened by moving one or more spinneret sections. After opening, the interior of the spinneret is accessible and can be cleared of deposits (softening, honeydew, etc.).

Various opening mechanisms are already known (see e.g. the EP 2 573 220 A2 or the DE 10 2015 100 825 A1 ).

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

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

As already mentioned, the yarn forming element is held by the second spinneret section with the aid of a guide. The guide is preferably part of the second spinneret section or is formed directly by it, for example with the aid of the bore, which will be explained in more detail later. In any case, the guide is designed in such a way that the yarn-forming element is movable relative to the second spinneret section and thus also relative to the first spinneret section. In particular, a movement from a spinning position into a cleaning position is possible. The spinning position is the position that the yarn-forming element assumes during a spinning process, ie during the manufacture of a yarn. In contrast, the cleaning position is a position which the yarn-forming element assumes when the spinning process has been interrupted and cleaning of the yarn-forming element or the swirl chamber is desired. For this, the yarn forming element is in one of Moving away from the inlet opening of the spinneret in the cleaning position.

In the cleaning position, the distance between the inlet opening and the inlet of the yarn-forming element is therefore greater than in the spinning position.

In addition, the spinneret preferably includes a suction channel, which is preferably designed as an opening in a wall of the second spinneret section that delimits the vortex chamber to the outside. The suction channel is connected to a vacuum supply during operation of the spinneret, so that air can be sucked out of the swirl chamber and thus also in the swirl chamber or impurities adhering to the yarn formation element via the suction channel. To equalize the pressure, air flows into the swirl chamber via the inlet opening of the spinneret.

The movement of the yarn-forming element from the spinning position into the cleaning position here favors the suctioning off of impurities in the form of fiber residues, which wrap around the tip of the yarn-forming element having the inlet and adversely affect the spinning process.

However, there are always cases in which the cleaning process described by suction of air from the swirl chamber is not sufficient to remove fiber residues or other impurities, such as honeydew, from the tip of the yarn-forming element.

It is therefore proposed according to the invention that the first spinneret section is fastened to the second spinneret section via at least one pivot axis and can be pivoted about a pivot axis from a closed position to an open position.

The closed position is the position of the first spinneret section which it assumes during the spinning process. In this position, the first spinneret section bears against the second spinneret section, so that the vortex chamber is closed to the outside by the two spinneret sections.

If the first spinneret section is pivoted starting from its closed position, it is in its open position. The open position is understood here to mean any position of the first spinneret section that deviates from the closed position. Furthermore, it is provided that the inlet of the yarn formation element is accessible to an operator from outside only in the open position, regardless of the position of the yarn formation element (spinning position or cleaning position). If the first spinneret section is in its closed position, the tip of the yarn formation element is not accessible and protected from the outside.

By pivoting the first spinneret section, the spinneret is opened as a whole, so that an operator can directly remove fiber residues from the tip of the yarn-forming element, which has the inlet, from the outside. After this cleaning process, the first spinneret section can be pivoted again from its open position into the spinning position, so that the spinning process can be continued.

Thus, while the yarn-forming element can preferably only be moved linearly relative to the second spinneret section, the first spinneret section can preferably be pivoted exclusively relative to the second spinneret section.

It is particularly advantageous if the pivot axis is in operative connection with the first spinneret section on the one hand and with the second spinneret section on the other hand. For example, it would be conceivable that both the first spinneret section and the second spinneret section have a receptacle into which the pivot axis extends. At this point, however, it should be pointed out that the swivel axis does not necessarily have to be a bolt-shaped structure. It would also be conceivable that the pivot axis is merely an imaginary axis about which the first spinneret section can be pivoted with respect to the second spinneret section. The connection of the two spinneret sections can thus take place, for example, by means of a tab which enables the desired pivoting process.

Furthermore, it is advantageous if the yarn-forming element can be moved relative to the second spinneret section only linearly and preferably colinearly with respect to a longitudinal axis of a draw-off channel connecting the inlet of the yarn-forming element with its outlet. The draw-off channel connects the inlet and the outlet of the yarn-forming element and serves to guide the yarn during the spinning process. It is advantageous if, starting from its spinning position, the yarn-forming element can be moved at least 3 mm, preferably at least 5 mm, in the direction facing away from the inlet opening of the spinneret.

Preferably, the yarn-forming element comprises a section surrounding the outlet, which in each position of the yarn-forming element and also is visible and / or palpable in any position of the first spinneret section from outside the spinneret.

It has particular advantages if the guide of the yarn formation element is designed as a bore, the yarn formation element in the region of the bore having a cylindrical outer contour corresponding to the bore, via which it is in contact with the guide. The yarn forming element therefore lies in particular on its outer contour against the inner wall of the bore and is thereby guided so as to be movable in the axial direction of the draw-off channel.

It is also extremely advantageous if the spinneret has a force accumulator, with the aid of which the first spinneret section has no external force, i.e. without an operator trying to move the first spinneret section to its open position, is held in its closed position. If the first spinneret section is moved into its open position by an operator for cleaning the yarn-forming element, the first spinneret section only remains in its open position until the operator no longer acts on the first spinneret section. From this point in time, the energy accumulator causes the first spinneret section to move back into its closed position. In addition or as an alternative to the energy accumulator, there may also be a magnet which is, for example, firmly connected to the second spinneret section and is in operative connection with a surface section or further magnets of the first spinneret section which is attracted by the magnet. Of course, the magnet can also be arranged on the first spinneret section and cooperate with a surface section or other magnets in the region of the second spinneret section.

It is advantageous if the first spinneret section starts from its closed position by an angle α is pivotable into its open position, the amount of which is between 25 ° and 120 °. An angle is preferred, the amount of which is between 45 ° and 70 °.

It is also advantageous if the first spinneret section has a connection for a compressed air line, via which the air nozzles can be supplied with compressed air. The spinnerets are therefore preferably located completely in the first spinneret section. Furthermore, there should be a cavity within the first spinneret section, which connects the individual spinnerets to the connection for the compressed air line.

It is advantageous if a seal is arranged between the first spinneret section and the second spinneret section, by means of which the vortex chamber in the closed position of the first spinneret section in the region of the first spinneret section is sealed airtight from the surroundings of the spinneret. The seal is preferably an annular seal, which is connected, for example, to the first spinneret section or the second spinneret section by positive locking or with the aid of an adhesive connection.

It is also extremely advantageous if the spinneret has a carrier by means of which it can be connected to a holding section of an air spinning machine, the carrier being rigid and preferably being connected exclusively to the second spinneret section or being formed by the latter. Carrier and second spinneret section can be designed as a separate component. It is also possible that the second spinneret section is formed in one piece with the carrier. The carrier preferably has a bearing section which can be formed, for example, by a bore. Via the bearing section, the spinneret can be movably attached, for example, to a holding section of an air spinning machine designed as a bolt. In this case, the spinneret as a whole can be moved, preferably pivoted, relative to other components of the air spinning machine.

The method according to the invention is characterized in that the first spinneret section is fastened to the second spinneret section via at least one pivot axis and is pivoted from a closed position into an open position about the pivot axis during the opening of the spinneret. It is provided here that the inlet of the yarn-forming element, irrespective of the position of the yarn-forming element (spinning position or cleaning position), is only accessible to an operator from the outside in the open position, the yarn-forming element being cleaned by an operator after the first spinning nozzle section has been pivoted.

The section of the yarn forming element which has the inlet is therefore protected from external influences within the spinneret until an operator pivots the first spinneret section into the corresponding open position. In this position, the yarn-forming element and in particular its inlet are accessible from the outside, so that adhering fiber residues or other impurities can easily be removed by the operator. After the end of the cleaning step, the first spinneret section is returned to its spinning position, either by the operator or with the help of an energy store or Magnets are released as soon as the operator stops applying force to the first section of the spinneret.

Preferably, during the cleaning of the yarn formation element, the yarn formation element is first displaced relative to the second spinneret section. Subsequently or simultaneously, air is sucked out of the swirl chamber via a suction channel, which is preferably part of the second spinneret section, air simultaneously flowing into the swirl chamber via the inlet opening of the spinneret. This already removes fiber residues from the swirl chamber. It is therefore advantageous if a negative pressure is applied to the swirl chamber via a suction channel of the spinneret when the yarn-forming element is in its cleaning position in order to suck off fiber residues from the swirl chamber, air being sucked in from the surroundings into the swirl chamber through the inlet opening of the spinneret becomes.

In a further step, the first spinneret section can finally be pivoted into its open position relative to the second spinneret section and also relative to the yarn-forming element in order to allow an additional manual cleaning of the yarn-forming element or the swirl chamber by an operator.

After cleaning has ended, the first spinneret section is finally pivoted back into its closed position. The yarn-forming element is also shifted back into its spinning position. After completing the above movements, the spinning process can be started again.

It also has advantages if the operator moves the yarn forming element with the help of an actuator of the air spinning machine and swivels the first spinneret section manually. The actuator can be, for example, one or more levers that are connected to a section of the yarn-forming element that is arranged outside the second spinneret section. This section preferably has the outlet of the yarn-forming element and has, for example, a groove or a bulge which is connected to the actuator.

In particular, a spinneret is used in the sense of the description of the device claims. It is also conceivable that the spinneret according to the invention has features that have been described exclusively in connection with the method.

• 1 einen Querschnitt einer erfindungsgemäßen Spinndüse, wobei sich das Garnbildungselement in seiner Spinnstellung und der erste Spinndüsenabschnitt in seiner Schließstellung befindet,
• 2 die Spinndüse gemäß 1, nachdem das Garnbildungselement in seine Reinigungsstellung bewegt wurde, und
• 3 die Spinndüse gemäß 2 mit dem ersten Spinndüsenabschnitt in Offenstellung.

Further advantages of the invention are described in the following exemplary embodiments. Each shows schematically:

• 1 3 shows a cross section of a spinneret according to the invention, the yarn-forming element being in its spinning position and the first spinneret section in its closed position,
• 2nd the spinneret according to 1 after the yarn forming member has been moved to its cleaning position, and
• 3rd the spinneret according to 2nd with the first spinneret section in the open position.

1 shows a spinneret according to the invention 1 in cross section, as used in air spinning machines, which are known in principle from the prior art.

The spinneret 1 has a housing that has at least a first spinneret section 5 and a second spinneret section 6 includes. The first spinneret section 5 and the second spinneret section 6 limit an internal vortex chamber 4th in which a yarn forming element 9 with an internal duct 15 protrudes.

The yarn forming element 9 is preferably with respect to only in 2nd shown longitudinal axis 14 rotationally symmetrical and preferably has a cylindrical outer contour 16 on that on a tour 12 of the second air nozzle section 6 is present. The leadership 12 allows a linear movement of the yarn forming element 9 between the in 1 shown spinning position and in the 2nd and 3rd shown cleaning position. The movement of the yarn forming element 9 is carried out, for example, by an actuator 24th , which is formed for example by one or more levers.

As can also be seen from the figures, the first spinneret section has 5 several air jets 8th on that via a corresponding connection to a connector 19th are in fluid communication with the connector 19th is formed with a compressed air line 20th to be connected to the air spinning machine. When operating the spinneret 1 is via the compressed air line 20th Compressed air in the air nozzles 8th brought in. Since this is tangential to the swirl chamber 4th open, arises in the area of the inlet 10th of the yarn forming member 9 a vortex air flow, which is a rotation of the fibers of the inlet opening 7 introduced fiber dressing 3rd causes. In the area of the inlet 10th of the yarn forming member 9 arises from the fiber composite 3rd a yarn 2nd , which via the culvert 15 and finally the outlet 11 of the yarn forming member 9 from the spinneret 1 can be deducted. The one over the air vents 8th air introduced escapes primarily through a suction channel 25th , which is connected to a corresponding vacuum supply, not shown, of the air spinning machine.

The spinneret 1 itself is preferably over a carrier 22 which is particularly rigid with the second spinneret section 6 is connected to a holding section 23 the air spinning machine.

The principle of an air spinning machine is well known from the prior art, so that further explanations are not necessary at this point.

During the spinning process, impurities or fiber remnants of the fiber structure increasingly accumulate 3rd on the yarn forming member 9 from. It is therefore necessary at regular intervals, the yarn forming element 9 , especially the area around its entrance 10th , to clean.

As already mentioned, it is possible in this connection, the yarn forming element 9 , preferably with the help of the actuator 24th or manually, from the in 1 shown in the spinning position in the 2nd and 3rd shown cleaning position to move.

Like comparing the 1 and 2nd can be seen in this context, by the movement of the yarn forming element 9 the distance between its inlet 10th and the inlet opening 7 the spinneret 1 or the first spinneret section 5 enlarged. Fiber residues that are in the area of the inlet 10th on the surface of the yarn forming member 9 have accumulated, this can be easier from the yarn forming element 9 solve and will eventually through the suction channel 25th from the spinneret 1 aspirated.

However, it often happens that there are fiber residues, especially in interaction with adhesive substances from the fiber structure 3rd into the vortex chamber 4th be introduced (such as honeydew) stubbornly on the surface of the yarn forming element 9 fix. Such contamination can be extracted by suction of air through the suction channel 25th usually no longer from the yarn forming element 9 to solve. In this case, manual intervention by an operator is necessary.

Like comparing the 2nd and 3rd shows, it is in addition to the movement of the yarn forming member 9 possible the first spinneret section 5 relative to the second spinneret section 6 about a pivot axis 13 to pivot. The pivoting can be done manually by the operator or automatically with a handling device of the air spinning machine, such as a lever element, not shown.

In any case, it is possible for the operator to remove contaminants directly from the yarn forming element 9 remove after the first spinneret section 5 in the in 3rd shown open position was pivoted.

After the cleaning process, the first spinneret section can 5 finally back to its closed position and the yarn forming element 9 in its spin position ( 1 ) are moved to the vertebral chamber 4th complete with the outside world.

The movement of the first spinneret section 5 can be in its closed position either manually by the operator or with the help of an energy store 17th be effected. In 3rd is an example of an energy store 17th Shown in the form of a spiral spring, the first spinneret section 5 holds in the closed position when there is no force or moves back into it when there is an external force in the open position of the first spinneret section 5 not applicable.

Additionally or alternatively, one or more magnets can be used 18th be present (see 2nd ), the first spinneret section 5 if there is no external force, fix it in its closed position.

Finally, between the first spinneret section 5 and the second spinneret section 6 a seal 21st , for example in the form of a sealing ring, over which the first spinneret section 5 in its closed position on the second spinneret section 6 is airtight.

The first spinneret section 5 is by the way an angle α pivotable, the amount of which is preferably between 25 ° and 120 °.

The present invention is not limited to the exemplary embodiments shown and described. Modifications within the scope of the patent claims are possible as well as any combination of the described features, even if they are shown and described in different parts of the description or the claims or in different exemplary embodiments, provided that there is no contradiction to the teaching of the independent claims.

Reference symbol list

1

Spinneret

2nd

yarn

3rd

Fiber dressing

4th

Vortex chamber

5

first spinneret section

6

second spinneret section

7

Inlet opening

8th

Air nozzle

9

Yarn forming element

10th

inlet

11

Outlet

12

guide

13

Swivel axis

14

Longitudinal axis

15

Culvert

16

cylindrical outer contour

17th

Lift mechanism

18th

magnet

19th

connection

20th

Compressed air line

21st

poetry

22

carrier

23

Holding section

24th

Actuator

25th

Suction channel

α

Angle by which the first spinneret section can be pivoted

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included 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.

Patent literature cited

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

Claims (12)

Spinning nozzle (1) for an air spinning machine for producing a yarn (2) from a fiber structure (3) fed to the spinning nozzle (1), the spinning nozzle (1) having an internal swirl chamber (4) which is separated from a first spinning nozzle section (5). and a second spinneret section (6) is at least partially limited to the outside, - the first spinneret section (5) comprising an inlet opening (7) for the fiber structure (3) and a plurality of air nozzles (8) via which air into the swirl chamber (4 ) can be introduced, - the spinneret (1) an at least partially extending into the swirl chamber (4) yarn forming element (9) with an inlet (10) for the fiber structure (3) and an outlet (11) for inside the swirl chamber ( 4) has yarn (2) produced in the region of the yarn-forming element (9) during operation of the spinneret (1), and - the yarn-forming element (9) being held by the second spinneret section (6) with the aid of a guide (12) and relative to the second Spinning Nozzle section (6) can be moved between a spinning position and a cleaning position, characterized in that the first spinning nozzle section (5) is fastened to the second spinning nozzle section (6) via at least one swivel axis (13) and around the swivel axis (13) from a closed position to a The open position can be pivoted, the inlet (10) of the yarn forming element (9) being accessible to an operator from outside only in the open position, regardless of the position of the yarn forming element (9). Work station according to the preceding claim, characterized in that the swivel axis (13) is operatively connected on the one hand to the first spinneret section (5) and on the other hand to the second spinneret section (6). Work station according to one of the preceding claims, characterized in that the yarn-forming element (9) with respect to the second spinneret section (6) is only linear and preferably colinear with a longitudinal axis (14) of an inlet (10) of the yarn-forming element (9) with its outlet (11 ) connecting trigger channel (15) is movable. Work station according to one of the preceding claims, characterized in that the guide (12) is designed as a bore, the yarn-forming element (9) in the region of the bore having a cylindrical outer contour (16) corresponding to the bore, via which it is connected to the guide ( 12) is in contact. Work station according to one of the preceding claims, characterized in that the spinneret (1) has a force accumulator (17) and / or a magnet (18), with the aid of which the first spinneret section (5) is held in its closed position without external force. Work station according to one of the preceding claims, characterized in that the first spinneret section (5) can be pivoted from its closed position by an angle α into its open position, the angle α having an amount which is between 25 ° and 120 °. Work station according to the preceding claim, characterized in that the first spinneret section (5) has a connection (19) for a compressed air line (20) via which the air nozzles (8) can be supplied with compressed air. Work station according to one of the preceding claims, characterized in that a seal (21) is arranged between the first spinneret section (5) and the second spinneret section (6) through which the vortex chamber (4) in the closed position of the first spinneret section (5) Area of the first spinneret section (5) is sealed airtight from the surroundings of the spinneret (1). Work station according to one of the preceding claims, characterized in that the spinneret (1) has a carrier (22) via which it can be connected to a holding section (23) of an air spinning machine, the carrier (22) being rigid and preferably exclusively with the second Spinneret section (6) is connected. Method for cleaning a spinneret (1) on an air spinning machine, which is used to produce a yarn (2) from a fiber assembly (3) fed to the spinneret (1), - the spinneret (1) having an internal swirl chamber (4) which is at least partially limited towards the outside by a first spinneret section (5) and a second spinneret section (6), - the first spinneret section (5) comprising an inlet opening (7) for the fiber structure (3) and a plurality of air nozzles (8) air is introduced into the swirl chamber (4) during operation of the spinneret (1), - the spinneret (1) comprising a yarn-forming element (9) which extends at least partially into the swirl chamber (4) and has an inlet (10) for the fiber structure ( 3) and an outlet (11) for the yarn (2) produced within the swirl chamber (4) in the region of the yarn formation element (9) during operation of the spinneret (1), and - wherein the yarn-forming element (9) is moved from a spinning position into a cleaning position before or during the opening of the spinning nozzle (1) relative to the second spinning nozzle section (6), characterized in that the first spinning nozzle section (5) during the opening of the spinning nozzle (1) is pivoted about a pivot axis (13) from a closed position into an open position, the inlet (10) of the yarn forming element (9) being accessible to an operator from outside only in the open position, regardless of the position of the yarn forming element (9), and wherein Yarn formation element (9) is cleaned by an operator after pivoting the first spinneret section (5). Method according to the preceding claim, characterized in that the movement of the yarn forming element (9) with the aid of an actuator (24) of the air spinning machine and the pivoting of the first spinneret section (5) is carried out manually by the operator. Procedure according to Claim 10 or 11 , characterized in that the vortex chamber (4) via a suction channel (25) of the spinneret (1) is subjected to a negative pressure when the yarn forming element (9) is in its cleaning position in order to suck off fiber residues from the vortex chamber (4), whereby air is drawn in from the surroundings through the inlet opening (7) of the spinneret (1) into the swirl chamber (4).

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