SLIVER RECEIVING DEVICE AND METHOD FOR FORMING SAME

Abstract

The invention relates to a sliver receiving device for supplying a sliver coming from a drafting system to a yarn-forming element of a spinning device, an air jet spinning device and a method for forming a sliver receiving device for supplying a sliver coming from a drafting device to a yarn-forming element of a spinning device. The sliver receiving device according to the invention comprises a main body having an inlet opening for receiving the sliver supplied from the drafting system, and a sliver guide device arranged behind the inlet opening for the defined supplying of the sliver to the yarn-forming element.

Claims

1. A sliver receiving device (1) for feeding a sliver coming from a drafting system to a yarn forming element (2) of a spinning device, comprising a basic body (4), which has an inlet opening (3) for receiving the sliver fed from the drafting system, and a sliver guiding apparatus (5), which is arranged downstream of the inlet opening (3) in the sliver receiving direction (1), for feeding the sliver to the yarn forming element (2) in a defined manner, wherein, the sliver guiding apparatus (5) has an individual needle (6), which is formed integrally with the basic body (4), or the sliver guiding apparatus (5) is formed from two needles (6a, 6b) arranged next to each other, the needle tip of which at least partly extends into a blowing air nozzle section (7) formed integrally with the basic body (4) for producing a rotating air flow or is arranged upstream of the blowing air nozzle section (7) from the direction of the inlet opening (3).

2. The sliver receiving device (1) according to claim 1, wherein at least the basic body (4) and the sliver guiding apparatus (5) are formed of an identical material.

3. The sliver receiving device (1) according to claim 1, wherein the blowing air nozzle section (7) is formed of the same material as the basic body (4) or the sliver guiding apparatus (5).

4. The sliver receiving device (1) according to claim 1 wherein the sliver receiving device (1) being formed of ceramic.

5. The sliver receiving device (1) according to claim 1, wherein the sliver receiving device (1) having a ceramic coating at least on all fibre-guiding surface sections.

6. The sliver receiving device (1) according to claim 1, wherein the two needles (6a, 6b) are formed and/or arranged mirror-symmetrically to each other.

7. The sliver receiving device (1) according to claim 1, wherein the two needles (6a, 6b) each have a rotationally asymmetrical shape.

8. The sliver receiving device (1) according to claim 1, wherein a sliver table (8) is arranged between the inlet opening (3) and the sliver guiding apparatus (5), by means of which sliver table (8) the sliver can be guided, the sliver table (8) having a closed and continuous surface.

9. An air-jet spinning device, comprising a spinning nozzle (10) having a spinning cone (9), wherein a sliver receiving device (1) according to claim 1 is arranged upstream of the spinning cone (9) in the sliver receiving direction.

10. An air-jet spinning device according to claim 9, wherein the sliver guiding apparatus (5) of the sliver receiving device (1) extends at least partly into the blowing air nozzle section (7) and/or partly into an opening (11) in the spinning cone (9).

11. A method for forming a sliver receiving device (1) for feeding a sliver coming from a drafting system to a yarn forming element (2) of a spinning device, according to claim 1 wherein a sliver guiding apparatus (5) for feeding the sliver to the yarn forming element (2) in a defined manner, which sliver guiding apparatus (5) is arranged downstream of an inlet opening (3) and is formed from a needle (6), is formed integrally with a basic body (4) of the sliver receiving device (1), or in that, in the case of a sliver guiding apparatus (5) arranged downstream of an inlet opening (3) and formed from two needles (6a, 6b) arranged next to each other, a blowing air nozzle section (7) for producing a rotating air flow in the spinning device is formed integrally with a basic body (4) of the sliver receiving device (1).

12. The method according to claim 11, wherein the sliver receiving device (1) is formed by means of an additive manufacturing method.

13. The method according to claim 11, wherein the sliver receiving device (1) is formed from ceramic and by means of stereolithography.

14. The method according to claim 11, wherein the sliver receiving device (1) is formed from metal by means of laser sintering.

Description

[0031] Several embodiment examples of the sliver receiving device according to the present invention and parts thereof are explained in more detail below with reference to the drawings. In the drawings:

[0032] FIG. 1 shows a sectional view of a region of an air-jet spinning device having a first embodiment of a sliver receiving device,

[0033] FIG. 2 shows a sectional view of a region of an air-jet spinning device having a second embodiment of a sliver receiving device,

[0034] FIG. 3a shows a magnified sectional view of the sliver receiving device shown in FIG. 1, with a blowing air nozzle section,

[0035] FIG. 3b shows a perspective outer view of the sliver receiving device shown in FIG. 3a,

[0036] FIG. 4a shows a perspective outer view of a part of the sliver receiving device shown in FIG. 3,

[0037] FIG. 4b shows a perspective outer view, rotated relative to FIG. 4a, of a part of the sliver receiving device shown in FIG. 3, and

[0038] FIG. 4c shows a top view of the sliver receiving device shown in FIG. 4a, the view being directed at a sliver guiding apparatus.

[0039] A sliver receiving device 1 shown in FIG. 1 has a single-piece basic body 4 and is arranged in an air-jet spinning device, facing a yarn forming element 2 of the air-jet spinning device. The yarn forming element 2 comprises a spinning nozzle 10 having a spinning cone 9.

[0040] The sliver receiving device 1 has an inlet opening 3, through which a sliver coming from a drafting system can be fed to the sliver receiving device 1. The surface of the sliver receiving device 1 is formed, downstream of the inlet opening 3 in the transport direction of the sliver, as a sliver table 8, via which the sliver is fed to a sliver guiding apparatus 5.

[0041] The sliver guiding apparatus 5 has the function of feeding the sliver to the yarn forming element 2 in a controlled and defined manner. Furthermore, the sliver guiding apparatus 5 acts as a twist stopping apparatus, which prevents the situation in which the entire sliver or at least excessive portions of the sliver are swirled in the air spinning process. The sliver guiding apparatus 5 is formed as a tweezers nozzle from two needles 6a, b arranged parallel to each other, the needles 6a, b each being formed integrally with the basic body 4 and extending from the sliver table 8 toward the spinning cone 9.

[0042] In order to be able to spin the sliver to form a yarn, a blowing air nozzle section 7 is provided, which is formed integrally with the basic body 4 and is arranged in the region of the yarn forming element 2 (see FIG. 3b). The two needles 6a, b of the sliver guiding apparatus 5 extend at least partly into the blowing air nozzle section 7 so that the rear, free ends of the edge fibres of the sliver are exposed in the blowing air nozzle section 7 to an air flow exiting from blowing air nozzles 12 after said free ends exit the sliver guiding apparatus 5, said free ends being lifted off or detached from the sliver.

[0043] At the same time, the front ends of the fibres are generally not completely detached, because they are already trapped by wrap fibres and inserted into the spinning nozzle 10. The free fibre ends detached from the sliver are wrapped around the spinning cone 9 and given a twist by a rotating air flow produced by means of the blowing air nozzles 12. The rear free ends of the fibres are continuously drawn into an opening 11 in the spinning nozzle 10 by the continuous movement of the sliver in the sliver transport direction, the edge fibres being helically wrapped around the core fibres of the sliver.

[0044] However, not all fibres and fibre ends detached from the sliver are spun to form the yarn in this process, and therefore these released fibres can be easily caught at edges and separation points between components of the sliver receiving device 1. Accordingly, a single-piece design of the sliver receiving device 1 is advantageous. Furthermore, a single-piece design prevents leaks between the components, enabling more accurate formation of a rotating air flow in the blowing air nozzle section 7.

[0045] The sliver guiding apparatus 5 is formed from two identical needles 6a, b, which are arranged parallel to each other on both sides of the inlet opening 3 in the region of the sliver table 8 (see FIG. 3a). The tips of the needles 6a, b are arranged in the blowing air nozzle section 7 in the region of the outlet openings of the blowing air nozzles 12. Each needle 6a, b has a rotationally asymmetrical shape over the entire length and is flattened in particular on the surface section facing the opposite needle 6a, b.

[0046] As shown in FIG. 4, the two needles 6a, b continuously adjoin the surface of the sliver table 8, the two needles 6a, b being arranged opposite each other mirror-symmetrically. The sliver table 8 has a curved, edgeless surface.

[0047] A second embodiment of a sliver receiving device 1, shown in FIG. 2, differs from the first embodiment shown in FIG. 1 significantly in that the blowing air nozzle section 7 having the blowing air nozzles 12 is not formed integrally with the basic body 4 and in that the sliver guiding apparatus 5 is formed from a single needle 6, which is arranged in the entire blowing air nozzle section 7 and extends into the opening 11 in the spinning nozzle 10. Furthermore, the inlet opening 3 is arranged at an offset to and, at the same time, parallel to a central longitudinal axis of the basic body 4, while the needle 6 extends along said central longitudinal axis.

LIST OF REFERENCE SIGNS

[0048] 1 Sliver receiving device [0049] 2 Yarn forming element [0050] 3 Inlet opening [0051] 4 Basic body [0052] 5 Sliver guiding apparatus [0053] 6 Individual needle [0054] 6a First needle [0055] 6b Second needle [0056] 7 Blowing air nozzle section [0057] 8 Sliver table [0058] 9 Spinning cone [0059] 10 Spinning nozzle [0060] 11 Opening [0061] 12 Blowing air nozzle