METHOD FOR CLEANING AN AIR JET SPINNING DEVICE OF A SPINNING STATION, AN AIR JET SPINNING DEVICE OF THIS TYPE AND A THREAD-FORMING UNIT FOR AN AIR JET SPINNING DEVICE OF THIS TYPE

Abstract

Method for cleaning an air jet spinning device of a spinning station, an air jet spinning device and a thread-forming unit for an air jet spinning device. The air jet spinning device has a thread-forming unit having a thread-forming element arranged in a vortex chamber of a nozzle unit, and a nozzle unit having at least one air nozzle orientated towards the vortex chamber such that an air flow exiting the air nozzle impinges on the sliver in the vortex chamber with a rotation flow. The thread-forming unit has an element carrier for detachably receiving and releasing the thread-forming element or, alternatively or in addition, can be linearly shifted in conjunction with the air jet spinning device relative to the nozzle unit between a closed operating position and an open cleaning position, and the air jet spinning device can be linearly shifted and/or pivoted in the cleaning position.

Claims

1. An air jet spinning device for manufacturing an air-spun thread from a supplied sliver, the air jet spinning device comprising: a thread-forming unit, which has a thread-forming element which can be or is arranged in a vortex chamber of a nozzle unit, and the nozzle unit, which has at least one air nozzle oriented toward the vortex chamber such that an air flow emerging from the air nozzle applies a rotational flow to the sliver, which can be or is fed into the vortex chamber, characterised in that the thread-forming unit is mounted so as to be linearly displaceable relative to the nozzle unit between a closed operating position and an open cleaning position of the air jet spinning device, and the air jet spinning device is linearly displaceable and/or pivotable in the cleaning position.

2. The air jet spinning device according to claim 1, characterised in that a drafting system for feeding the sliver is associated with the air jet spinning device, the air jet spinning device being rotatably and/or pivotably supported on the drafting system for the purpose of the displacement and/or pivoting ability relative to the drafting system in the cleaning position.

3. The air jet spinning device according to claim 1, characterised by a drive unit for the automated displacement and/or pivoting of the air jet spinning device in the cleaning position.

4. The air jet spinning device according to claim 1, characterised in that the thread-forming unit is linearly displaced relative to the nozzle unit in the longitudinal axis direction of the thread-forming element.

5. The air jet spinning device according to claim 1, characterised in that the thread-forming unit is mounted on a guide element (7) having a guide section, so as to be linearly displaceable relative to the nozzle unit.

6. The air jet spinning device according to claim 1, characterised by an associated drive unit for repositioning the air jet spinning device between the operating position and the cleaning position.

7. The air jet spinning device according to claim 1, characterised in that the thread-forming unit has an element carrier, that releasably holds the thread-forming element in the cleaning position of the air jet spinning device.

8. The air jet spinning device according to claim 1, characterised in that the element carrier has mounting openings for the bayonet-type locking of the thread-forming element and/or the locking of the thread-forming element by fastening clips.

9. The air jet spinning device according to claim 1, characterised in that the element carrier is for lateral removal of the thread-forming element parallel to the drafting plane of the sliver.

10. The air jet spinning device according to claim 1, characterised by an extraction device arranged below the drafting plane of the sliver in an entry region of the nozzle unit.

11. A method for cleaning an air jet spinning device according to claim 1, characterised in that the thread-forming unit is linearly displaced relative to the nozzle unit in order to reposition the air jet spinning device from the closed operating position to the open cleaning position, and the opened air jet spinning device is then linearly displaced and/or pivoted.

12. The method according to claim 11, characterised in that the air jet spinning device is linearly displaced and/or pivoted, in the cleaning position, relative to the associated drafting system such that an extraction device arranged below the drafting plane in an entry region of the nozzle unit enters an operative connection with an output bottom roller of an output roller pair of the drafting system.

13. The thread-forming unit for an air jet spinning device according to claim 1, characterised by an element carrier, which releasably holds a thread-forming element for arrangement in a vortex chamber of a nozzle unit, which nozzle unit can work in conjunction with the thread-forming unit.

14. The thread-forming unit according to claim 13, characterised in that the element carrier has mounting openings for the bayonet-type locking of the thread-forming element and/or the locking of the thread-forming element by fastening clips.

15. The thread-forming according to claim 13, characterised in that the element carrier is designed for the thread-forming element to be laterally received and removed obliquely to the thread forming direction of the thread-forming element.

16. The air jet spinning device according to claim 6, characterised in that the associated drive unit is a pneumatically acting drive unit.

17. The method according to claim 11, characterised in that the opened air jet spinning device is then linearly displaced and/or pivoted relative to an associated drafting system.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] An embodiment example of the present invention is explained below with reference to the drawings. In the drawings:

[0038] FIG. 1 shows a schematic representation of an air jet spinning device known from the prior art, with an upstream drafting system;

[0039] FIG. 2 shows a perspective representation of an air jet spinning device according to an embodiment example, which can be displaced and/or pivoted between an operating position and a cleaning position and then displaced and/or pivoted in relation to a drafting system;

[0040] FIG. 3 shows a further perspective representation of the air jet spinning device in FIG. 2;

[0041] FIG. 4 shows a side view of the air jet spinning device in FIG. 2 in the operating position;

[0042] FIG. 5 shows a side view of the air jet spinning device in FIG. 2 in the cleaning position and

[0043] FIG. 6 shows a perspective view of the air jet spinning device in FIG. 2 with a thread-forming element removed from an element carrier.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0044] For a general understanding of the mode of function of an air jet spinning device 2, FIG. 1 shows the basic structure of a drafting system 1 with a downstream air jet spinning device 2. The sliver 39 taken up from a sliver source not shown here is pulled in by an input roller pair formed by an input top roller 26 and an input bottom roller 27. The sliver 39 is then drafted between the second drafting system top roller 28 and the second drafting system bottom roller 29 as well as the third drafting system top roller 30 and third drafting system bottom roller 31 and the subsequent output roller pair consisting of output top roller 15 and output bottom roller 16. The drafted sliver 39 then passes through an entry region 12 of a nozzle unit 6 into the air jet spinning device 2 and is transformed therein into a thread by means of a thread-forming unit 3 and the nozzle unit 6 of the air jet spinning device 2.

[0045] The nozzle unit 6 has nozzles 40, 41 for this purpose, which are connected to a compressed air source 43 via lines 42. The air flowing out of the nozzles 40, 41 produces a rotational flow, which is applied to the fed, drafted sliver 39. The thread-forming unit 3 has a thread-forming element in the form of a spinning cone 5, which, in conjunction with the nozzle unit 6, forms a thread, which is taken up from the air jet spinning device 2 via the hollow spinning cone 5 through an outlet opening 13.

[0046] FIGS. 2 and 3 show an air jet spinning device 2 that can be repositioned between an operating position and a cleaning position, according to an embodiment example. The sliver 39 running in the region between the top rollers 15, 26, 28, 30 arranged on a weighting arm (not shown) and the bottom rollers 16, 27, 29, 31 arranged on a drafting system frame of the drafting system 1 is conveyed into the air jet spinning device 2 after having been drafted by the drafting system 1.

[0047] The air jet spinning device 2 has a nozzle unit 6 as well as a thread-forming unit 3, which can be repositioned relative to one another between an operating position shown in FIGS. 2, 3 and 4 and a cleaning position shown in FIGS. 5 and 6. In addition to the nozzles 40, 41 for generating a rotational flow acting on the drafted sliver 39, the thread-forming unit 3 also has a vortex chamber 4, within which, in the operating position, the thread-forming element in the form of the spinning cone 5 is arranged. Within the air jet spinning device 2, the drafted sliver 39 is transformed into a thread according to the operating principle shown in FIG. 1, which thread can be taken up through the outlet opening 13.

[0048] For repositioning the thread-forming unit 3 with the spinning cone 5 relative to the nozzle unit 6, the air jet spinning device 2 according to this embodiment example has a guide element 7 arranged on a base carrier 22 of the air jet spinning device 2. The guide element 7 has mounting openings for the displaceable mounting of guide rails 8 connected to the thread-forming unit 3 and of a guide element 9. A pneumatic drive unit 10 with a drive cylinder 11 is used to move the thread-forming unit 3 between the operating position and the cleaning position. A pressurisation of the drive cylinder 11 causes a displacement of the thread-forming unit 3 in the longitudinal axis direction of the guide rails 8 and the guide rod 9 relative to the base carrier 22 and the nozzle unit 6, which is arranged in a fixed position on the base carrier 22, into the cleaning position shown in FIGS. 5 and 6.

[0049] In the cleaning position, the air jet spinning device 2 is pivotably connected to the drafting system 1 by means of the articulated arrangement of the base carrier 22 on a retainer 23 arranged on the drafting system 1, the articulated connection being established by means of suitable bearing pins 24. In the cleaning position, the opened air jet spinning device 2 can be pivoted relative to the drafting system 1 in such a way that an extraction nozzle 17 of an extraction device 18, which is arranged in the entry region 12 of the nozzle unit 6, is arranged relative to the output bottom roller 16 in such a way that contamination can be extracted via the extraction nozzle 17 both from the entry region 12 of the nozzle unit 6 and from the region around the output bottom roller 16.

[0050] For easy replacement of the thread-forming element designed as a spinning cone 5, the air jet spinning device 2 has an element carrier 19 which is designed to detachably receive an element frame 25 which accommodates the spinning cone 5. Thus, the element frame 25 has an opening for receiving the spinning cone 5, which opening is provided with mounting openings 33 on the edge, which enable a bayonet-type reception of studs 34 arranged on the spinning cone 5, by means of which studs 34 the spinning cone 5 can thus be arranged in a fixed position on the element frame 25. A protrusion 35 projecting from a rear side of the spinning cone 5 extends, in the assembled position, through an opening 36 at the element frame 25 and allows the spinning cone 5 to be oriented in its circumferential direction.

[0051] The element frame 25, for its part, can be arranged in a fixed location on the element carrier 19. For this purpose, the element frame 25 has a bar element 38, which orients the element frame 25 in the circumferential direction with respect to the element carrier 19, as well as detent protrusions 21 for locking. In the assembled position of the element frame 25 on the element carrier 19, the bar element 38 extends through an opening 36 of the element carrier 19. In addition, the element frame 25 is locked in its position in the assembled position by means of elastic detent bodies 20, which engage with the detent marks 21 on the element frame 25. For removal of the element frame 25 with the spinning cone 5, the detent bodies 20 are moved against their elastic preload so that the element frame 25 can be removed laterally from the element carrier 19. The spinning cone 5, for its part, because of the bayonet-type connection with the element frame 25, can be moved by partial rotation into a position in which the spinning cone 5 can be removed from the element frame 25.

LIST OF REFERENCE SIGNS

[0052] 1 Drafting system [0053] 2 Air jet spinning device [0054] 3 Thread-forming unit [0055] 4 Vortex chamber [0056] 5 Thread-forming element [0057] 6 Nozzle unit [0058] 7 Guide element [0059] 8 Guide rail [0060] 9 Guide rod [0061] 10 Drive unit [0062] 11 Drive cylinder [0063] 12 Entry region [0064] 13 Outlet opening [0065] 15 Output top roller [0066] 16 Output bottom roller [0067] 17 Extraction nozzle [0068] 18 Extraction device [0069] 19 Element carrier [0070] 20 Detent body [0071] 21 Detent protrusions [0072] 22 Base carrier [0073] 23 Retainer [0074] 24 Bearing pin [0075] 25 Element frame [0076] 26 Input top roller [0077] 27 Input bottom roller [0078] 28 2nd drafting system top roller [0079] 29 2nd drafting system bottom roller [0080] 30 3rd drafting system top roller [0081] 31 3rd drafting system bottom section [0082] 33 Mounting opening [0083] 34 Stud [0084] 35 Protrusion [0085] 36 Opening [0086] 37 Recess [0087] 38 Bar element [0088] 39 Sliver [0089] 40 Nozzle [0090] 41 Nozzle [0091] 42 Lines [0092] 43 Compressed air source