Abstract
A spinning ring for a ring-spinning or ring-twisting machine includes a web and a ring crown, the ring crown having a contact surface along which a ring traveler slides in operation of the ring-spinning or ring-twisting machine. At least the contact surface of the ring crown formed of a tungsten sintered material having at least 90% tungsten. A ring/traveler system using the spinning ring includes a ring traveler made of a wire made of high-speed steel (HSS) having a minimum hardness of 60 HRC.
Claims
1-11: (canceled)
12. A spinning ring for a ring-spinning or ring-twisting machine, the spinning ring comprising: a web and a ring crown, the ring crown having a contact surface along which a ring traveler slides in operation of the ring-spinning or ring-twisting machine, and the contact surface of the ring crown formed of a tungsten sintered material having at least 90% tungsten.
13. The spinning ring according to claim 12, wherein the ring crown is formed entirely of the tungsten sintered material having at least 90% tungsten.
14. The spinning ring according to claim 12, wherein the tungsten sintered material is W97Ni2Fe1.
15. The spinning ring according to claim 12, further comprising a foot flange on a side of the web opposite the ring crown.
16. The spinning ring according to claim 15, wherein one or both of the foot flange and the web are made of copper or a copper alloy.
17. The spinning ring according to claim 15, wherein the copper alloy is a nickel aluminum bronze.
18. The spinning ring according to claim 15, wherein one or both of the foot flange and the web are made of steel.
19. The spinning ring according to claim 12, wherein a component of the spinning ring is formed of the tungsten sintered material is applied to the ring crown or to the web by a soldering process.
20. The spinning ring according to claim 12, the spinning ring as a whole is formed from the tungsten sintered material having at least 90% tungsten.
21. A ring/traveler system, comprising: a ring traveler made of a wire made of high-speed steel (HSS), the ring traveler having a minimum hardness of 60 HRC; and a spinning ring in accordance with claim 12.
22. The ring/traveler system according to claim 21, wherein the high-speed steel corresponds to material 1.3343 according to DIN EN ISO 4957 (2018 November) with the material name HS65-2C.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0055] The invention is described below on the basis of an exemplary embodiment and explained in more detail with the drawings. The following are shown:
[0056] FIG. 1 a schematic illustration of a ring-spinning machine;
[0057] FIG. 2 a schematic illustration of a spinning ring with a ring traveler;
[0058] FIG. 3 an enlarged view according to FIG. 2, and
[0059] FIG. 4 a schematic illustration of a second and third embodiment of a spinning ring.
DETAILED DESCRIPTION
[0060] Reference will now be made to embodiments of the invention, one or more examples of which are shown in the drawings. Each embodiment is provided by way of explanation of the invention, and not as a limitation of the invention. For example features illustrated or described as part of one embodiment can be combined with another embodiment to yield still another embodiment. It is intended that the present invention include these and other modifications and variations to the embodiments described herein.
[0061] FIG. 1 shows a schematic illustration of a spinning position of a ring-spinning machine, wherein current ring-spinning machines have up to 2'000 or more such spinning positions. In the ring-spinning machine, a fiber structure, a so-called roving 1, is fed to a drafting system 2. The roving 1 is drawn into a thread 3 by the drafting system 2. The drafting system 2 shown is a so-called apron drafting system, which is usually used for cotton. Many types of drafting systems 2 are known from the prior art, depending on the application. Downstream of the drafting system 2, the thread 3 is guided to a ring traveler 10 via a thread guide 4. After passing the ring traveler 10, the thread 3 is wound onto the bobbin 5. The bobbin 5 is set in rotation 6 by a drive 7. As a result of this rotation 6 of the bobbin 5, the ring traveler 10 is carried along by the thread 3, which means that the thread 3 is given a rotation and the yarn is thus formed. Because the ring traveler 10 is held on the spinning ring 8, the ring traveler 10 is forced to revolve around the bobbin 5. The spinning ring 8 is held in a stationary manner on a ring frame 9.
[0062] FIG. 2 is a schematic illustration of a spinning ring 8 having a ring traveler 10 placed thereon. The spinning ring 8 illustrated by way of example consists of a ring crown 14 and a web 15 adjoining the ring crown 14. The web 15 serves to fasten the spinning ring 8 in a spinning machine. The ring traveler 10 is placed on the ring crown 14 and surrounds the ring crown 14 in part. In this case, the ring traveler 10 is designed in such a way that it surrounds the ring crown 14 to a sufficient extent that the ring traveler 10 cannot fall off of the ring crown 14; however, the greatest possible freedom of movement of the ring traveler 10 relative to the ring crown 14 is achieved. Numerous forms and embodiments of ring crowns 14 and ring travelers 10 are known from the prior art. The rotational movement transmitted by the thread 3 to the ring traveler 10 causes the ring traveler 10 to revolve around the spinning ring 8 in the direction of the traveler rotation 11. This rotation in turn results in a centrifugal force 12 acting on the ring traveler 10. This presses the ring traveler 10 against the inside of the spinning ring 8 and/or the ring crown 14.
[0063] This situation is shown enlarged in FIG. 3. The ring traveler 10 slides along the spinning ring 8, thereby engendering a contact surface 13. At least in the region of this contact surface 13, it must be ensured that the ring traveler 10 has good sliding properties relative to the spinning ring 8. By means of a corresponding material selection of the ring crown 14 at least in the region of the contact surface 13, the sliding pairing between the spinning ring 8 and the ring traveler 10 is facilitated. The ring crown 14 is shown in the region of the contact surface 13 with an insert 16 made of a tungsten sintered material having at least 90% tungsten. In this case, the insert is connected to the ring crown by a soldering process on a base material, for example copper.
[0064] FIG. 4 shows a schematic illustration of a second and third embodiment of a spinning ring 8 according to the invention. The illustration is divided into two parts. The designs at left and at right each show a spinning ring 8 with a ring crown 14, a web 15 and a foot flange 17 arranged on a side of the web 15 facing away from the ring crown 14. The foot flange 17 serves to fasten the spinning ring 8 in a spinning machine. In the embodiment at right, the ring crown 14 is made of a tungsten sintered material with at least 90% tungsten, and the remaining part of the spinning ring 8, namely the web 15 and the foot flange 17, are made of a standard material, for example made of copper, a copper alloy, steel or a light metal. The ring crown 14 is connected to the web 15 by a soldering or welding process. In contrast to this, the entire spinning ring 8 in the embodiment at left is made of a tungsten sintered material with at least 90% tungsten.
[0065] The present invention is not limited to the embodiments shown and described. Modifications within the scope of the claims are possible as well as a combination of the features, even if these are shown and described in different embodiments.
KEY
[0066] 1 Roving [0067] 2 Drawing frame [0068] 3 Thread [0069] 4 Thread guide [0070] 5 Bobbin [0071] 6 Rotation [0072] 7 Drive [0073] 8 Spinning ring [0074] 9 Ring frame [0075] 10 Ring traveler [0076] 11 Traveler rotation [0077] 12 Centrifugal force [0078] 13 Contact surface [0079] 14 Ring crown [0080] 15 Web [0081] 16 Insert [0082] 17 Foot flange
