DESC:FIELD OF THE INVENTION
[001] The present invention relates to ring spinning and winding machines. Particularly the present invention relates to spindles mounted in the ring spinning machines. Still particularly, the present invention discloses a spindle with magnet sleeves to reduce the initial yarn breakages by reducing the friction between the Ring and Traveller.

BACKGROUND OF THE INVENTION
[002] Spinning machines for twisting and winding yarn has been known for some time. This apparatus generally consists of a spindle which supports the yarn bobbin, a ring surrounding the bobbin and a C-shaped traveller supported by the ring and capable of travelling about its circumference. With this structure the yarn which is supplied from an upper portion of the apparatus is fed to the bobbin via the traveller. The twisting and winding of the yarn are effected by tension on the yarn due to the winding operation which causes the traveller to move at relatively high speeds about the ring.

[003] In conventional spinning and twisting operations, the limiting factor with respect to increased speeds has always been the wear force between the traveller and the ring. The wear force between rings and travellers would results in friction. Increase in friction results in traveller wear out. As the polished surfaces of the traveller wear, they become roughened, increasing the coefficient of friction between the traveller and the ring. Such increased friction results in heat build-up. It is not uncommon for the toes of travellers to burn off, which in addition to loss of production time for replacement of the traveller, can cause damage to the yarn and the ring.

[004] Further, in addition to heat build-up, a roughened traveller will fray and eventually break the yarn, causing lost production time and a low quality end product. And such roughened travellers tend to become loaded with excess fibres resulting from such fraying, or fly, and again decrease production as they must be cleaned or replaced.

[005] Especially during the restarting time of ring spinning machines after doffing the full bobbins and replacing with empty bobbins, the yarn breakages would be higher due to increased yarn tension. As a result of excessive yarn tension, the friction between Ring and traveller would be higher which results in excessive heat generation and traveller damage or wear out.

[006] A Dutch patent application NL7006460 describes a magnetic coupling proposed to prevent bobbin from slipping and creeping up spindle. The spindle is of conventional design apart from magnetic coupling portion which comprises a collar of non-magnetic material containing band of magnetized material having opposite poles each end. To concentrate the lines of magnetic flux a low carbon steel, pole piece encircles the magnetized material. An inner ring of low carbon steel can be used also. The seat of the spindle can be covered by layer of synthetic resinous material for cushioning the bobbin. The provided solution is not effective for reduce the twisting and winding of yarn at initial stages.

[007] A Chinese patent application CN111705380 describes a single-motor-driven spindle and a textile machine. The spindle comprises a spindle blade base, a motor stator component and a motor rotor component, wherein the spindle blade base, the motor stator component and the motor rotor component are fixedly arranged on a rack. The spindle further comprises a spindle blade which rotates synchronously with the motor rotor component; and the projection of the motor rotor component and the projection of the motor stator component on the plane where the axis of a spindle blade rotating shaft is positioned do not coincide. The problems of head swinging and insufficient torque are avoided. The provided motor rotor component is a complex mechanism.

[008] A Korean patent application KR20010054901 proposes a spindle structure capable of continuously manufacturing spun yarn by supplying threads to a covering machine without winding threads on a bobbin is provided, which produces high quality spun yarn and improves working efficiency. In a spindle formed by a hole for passing through threads at the inside of a spindle and driven by a belt by combining a fixing device with a spindle by a bearing, the spindle structure is characterized in that a hole for passing through threads is formed on one side, a device connected by a bearing is installed at the upper part of a spindle, 4 to 8 permanent magnets are disposed at the lower part of the device, a permanent magnet is installed in its inside, a device rod is formed at the inside of the device and a guide pipe is combined at the upper part of a cover. The proposed device for spindle structure may not be effective solution. Also, forms an additional component for spindle structure.

[009] Though various efforts have been taken, the initial yarn breakages in the ring spinning machines are still a major problem in spinning mills. To overcome the disadvantages, present in the existing art, the present invention discloses an improved spindle for ring spinning machines to improve the frictional resistance and thereby to improve the working performance and traveller life and to reduce the yarn breakages.

OBJECTIVE OF THE INVENTION
[010] The principal objective of the present invention is to provide an improved spindles for textile spinning applications.

[011] Another objective of the present invention is to provide magnet sleeves in the spindle blade part of spindle.

[012] Another objective of the present invention is to provide plurality of slots in the Ring spindles to mount the magnet sleeves.

[013] Yet another objective of the present invention is to provide the magnet sleeves in the bobbins.

SUMMARY OF THE INVENTION
[014] The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the present invention or delineates the scope of the invention. Its sole purpose is to present some concept of the invention in a simplified form as a prelude to a more detailed description of the invention presented later.

[015] According to the main aspect of the present invention, a spindle to reduce the yarn tension during the initial stage of running of spinning machines is provided. A ring spindle comprises a spindle blade, spindle wharve, spindle bolster and a spindle lock. The bottom portion of said spindle blade comprises plurality of slots and Magnet sleeves are mounted in each slot of the spindle blade. Said magnet sleeves are preferably ferro magnets. Said magnet sleeve has a circular slot to mount the fastener and the slots in the spindle blade also have plurality of provisions to mount the fasteners.
BRIEF DESCRIPTION OF THE DRAWINGS
[016] The invention will be better understood and objects other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:

[017] Figure 1 illustrates a spindle for ring spinning machines known in the existing art.

[018] Figure 2 illustrates a spindle for ring spinning machines according to the present invention.

[019] Figure 3 illustrates an exploded view of a spindle for ring spinning machines according to the present invention.

Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure. Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.
DETAILED DESCRIPTION OF THE DRAWINGS
[020] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and sprit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[021] Figure 1 illustrates a ring spindle (1) according to the existing art. Said spindle comprises a spindle blade (2), spindle wharve (3), spindle bolster (4) and a spindle lock (5). Plurality of spindles (1) are mounted in the machine frame of ring spinning machines using the spindle bolster (4). The spindles are locked using the spindle lock (5) to arrest the free movement of the spindle while taking the bobbins outside.

[022] Figure 2 illustrates the ring spindle (11) according to the present invention. The bottom portion of the spindle blade (12) comprising plurality of slots (13). Magnet sleeves (14) are mounted in each slot (13) of the spindle blade (12). The magnet sleeves are fastened in the slot (13) using fastener or glue. The magnet sleeves are preferably ferro magnets. The width of each magnet sleeve (14) shall be 5.0 to 10.0 mm and the length of said sleeve shall be 10.0 to 50.0 mm. The thickness of the sleeve shall be 1.0 to 3.0 mm.

[023] Figure 3 illustrates the exploded view of ring spindle (11) according to another embodiment of the present invention. The magnet sleeve (14) has a circular slot (15) to mount the fastener (16). The slots (13) in the spindle blade (12) also have plurality of provisions (17) to mount the fasteners (16). The surface of the spindle blade (13) and the magnet sleeve (14) are positioned tangentially.

[024] The magnet sleeves are used to reduce the yarn tension during the initial stage of running of machines during restarting after every doffing. The magnet attracts the traveller and as a result the excessive centrifugal force is reduced. Therefore, the friction between ring traveller is reduced. This results in reduction of traveller wear out and results in lesser initial restarting breakages. ,CLAIMS:WE CLAIM:
1. A Spindle for spinning machines, said ring spindle (1) comprises a spindle blade (2), spindle wharve (3), spindle bolster (4) and a spindle lock (5) characterized in that, bottom portion of said spindle blade (12) comprising plurality of slots (13) and Magnet sleeves (14) are mounted in each slot (13) of the spindle blade (12).

2. The spindle as claimed in claim 1, wherein, the width of each magnet sleeve (14) shall be 5.0 to 10.0 mm and the length of said sleeve shall be 10.0 to 50.0 mm. The thickness of the sleeve shall be 1.0 to 3.0 mm.

3. The spindle as claimed in claim 1, wherein, said magnet sleeves (12) are fastened in the slots (13) using fastener or glue.

4. The spindle as claimed in claim 1, wherein, said magnet sleeves (13) are preferably ferro magnets.

5. The spindle as claimed in claim 1, wherein, said magnet sleeve (14) has a circular slot (15) to mount the fastener (16) and the slots (13) in the spindle blade (12) also have plurality of provisions (17) to mount the fasteners (16).