FR2525243A1 - SELF-CLEANING ROTATING RING FOR SPINNING AND TWISTING MACHINES - Google Patents

Abstract

The invention relates to the textile industry. The wall (26) of the ring (8) which carries the running track (6) for the traveller (4) has passing through it a multiplicity of outward-leading orifices (34), through which impurities (30) and fibres accumulated on the inside of the ring (8) are spun outwards under the effect of the centrafugal forces. The invention makes it possible to prevent a jamming of the traveller which could be caused by fluff, fibre flakes or the like in the rotating ring, particularly in the pneumatically mounted ring.

Description

Self-cleaning rotating ring for spinning and twisting machines.

 The present invention relates to the textile industry and, more particularly, to spinning and twisting continuous with rotary rings.

 The operation of these machines is too well known for it to be necessary to describe it in detail. Let us simply recall that a wire leaving a rolling device passes through a cursor circulating on a track carried by a ring concentric with a spindle carrying a support on which the wire is wound.

 On modern machines, the ring is rotatably mounted, generally on an air bearing, and is rotated by the rotation of the cursor on the track of the ring.

 A specific drawback of the rotating ring lies in the production of fillings between the cursor and its track. These accumulate in the groove formed in the internal surface of the ring to retain the cursor and the deposit can become large enough to lock the cursor in an inclined position on its track, in which the wire trapped between the cursor and his track ends up being severed.

 The presence of a slider cleaner, which is a fixed part forming a squeegee disposed outside the ring in the vicinity of the path of the slider, delays the appearance of this phenomenon, but does not prevent it.

 The present invention aims to remedy this drawback by allowing self-cleaning of the ring, which avoids the harmful accumulation of fluff and impurities.

 The subject of the invention is a rotary spinning or twisting ring in which the annular wall of the ring which supports the cursor guide track is pierced with a plurality of radial outlets for discharge towards the outside, by centrifugal effect, impurities and fluff accumulated on the inner face of said wall.

The invention will be better understood using the description which follows of the accompanying drawings. On these drawings
Ligure 1 is a vertical section view of a spinning or twisting ring
Figure 2 is an enlarged vee of part of the ring of Figure 1
Figure 3 is a view of the same ring showing the arrangement of the evacuation-jon fluff openings
Figures 4 and 5 are views similar to Figure 2 showing other shapes of rings
FIG. 6 shows the arrangement of the wading evacuation openings in the ring of FIG. 5.

 FIG. 1 shows a conventional spinning station with a rotating ring in which a thread 2, leaving a rolling device not shown, passes through a cursor 4 circulating on a track 6 carried by a ring 8 concentric with a spindle carrying a coil support 10 on which the wire is wound to form a coil 12.

Rotating rings mounted on air bearings are well known. In the example shown in FIG. 1, a stator 14 hollowed out of a groove 15 receives, by a pipe 16, compressed air which is distributed by nozzles 18, 20 in the interval between the stator 14 and parts opposite 22, 24 forming the rotor of the ring, to establish an air cushion therein. The air cushion which is established under the part 24, in the form of a collar, lifts the ring out of contact with the stator, while the air cushion which is established around the part 22, in the form of a skirt, centers the ring in the stator. There are of course many other types of rotating rings, for example pneumatic "aerodynamic" or magnetic and the invention applies to all rotating rings.

 There is shown on a larger scale in Figure 2 the upper part of the ring 8 of Figure 1 where we can see more clearly the cursor 4 which circulates on the track 6 which is supported, compared to the rest of the ring, by an annular wall 26.

In operation, the cursor 4 drives the ring
in rotation by friction of the cursor on the portion 28 of the track.

After a variable operating time with
the nature of the yarn worked, a pack of 30 fillers
rait in the hollow or groove area 32 of connection of
the annular wall 26 with the track 6. The cursor 4, by construction, is shaped in such a way that it cannot
reach the bottom of the groove 32 where the flocks 30 accumulate and therefore cannot dislodge them.

 If the pack of fluff gets bigger, it can block the cursor in an inclined position where the thread is trapped between the track and the cursor.

 According to the invention, to avoid this accumulation of flocks 30, openings 34 are drilled in the annular wall 26 of the ring, just below the groove 32.

 Figure 3 shows a possible embodiment of these openings. They are arranged substantially identical and equidistant on a circumference of the ring and occupy the largest possible area compatible with the rigidity of the ring. Under the action of the centrifugal force generated by the rotation of the ring 8 and under the action of the flow of air centrifuged through these openings, the flocks are projected outward through the openings 34 without being able to accumulate in a harmful way in the throat 32.

Self-cleaning of the rotating ring is thus obtained.

The rotating ring 8 shown in Figure 4 is quite similar to that of Figures 1 and 2, except that the annular wall 26 of the ring which supports the track 6 is flared frusto-conically upwards, thanks to which the openings 34, close to the zone 32 of accumulation of the flocks, are located in the region of more
large internal diameter D of the annular wall 26, which
increases the centrifugal effect of evacuation of the flocks.

The separation of the flocks from the ring can be completed by a fixed element, or blade 36, fixed to the ring holder plate 38 (FIG. 1) and whose edge 40 is pre
feels in the vicinity and at the level of the openings 34.

 The blade 36 can extend or be integral with a conventional CRSR cleaner 42 arranged, at a fixed station, in the vicinity of the path of the cursor 4.

 FIG. 5 represents another model of rotating ring 8 ′ which uses a type of cursor 4 ′ different from those described in connection with FIGS. 1 to 4. The bearing surface 44 of cursor 4 ′ on track 6 is increased by giving the internal surface of the wall 26 a frustoconical shape, the large base of which faces downwards. The flocks 30 tend to slide on the surface of the wall 26 and to accumulate in the groove 46 at the base of the cone trunk. However, the accumulation reaches a lesser degree than in the case of the C cursor of FIGS. 1 to 4, because the end 48 of the cursor 4 ′ penetrates almost to the bottom of the groove 46 and disperses the flocks 30 which tend to accumulate there.

If some openings 34 ′ are provided in the wall 26 of the ring at the level of the groove 46, the flocks are easily evacuated there. The cleaning is even more complete if the slider cleaner 42 is extended or accompanied downwards by a blade 36 which scrapes the wads passing through the openings 34 'under the action of centrifugal force.

Since the evacuation of the flocks is facilitated by the action of a squeegee played by the tip 48 of the cursor 4 ′, the openings 34 ′ can occupy a smaller surface than the openings 34 previously described.

Three or four openings 34 'affecting the shape of longer than tall slots arranged at substantially equal intervals on the circumference of the base ~ of the ring 8', as shown in Figure 6, give good results. It should also be noted that, in the case of FIG. 5 as in that of FIG. 4, the openings 34 ′ are formed in the zone of maximum internal diameter of the annular wall 26 of the ring.

 The present invention therefore makes it possible, thanks to the self-cleaning effect obtained, to improve the quality of the yarn and the productivity of the continuous spinning and twisting, in particular by reducing the number of breaks due to the jamming of the ring. on his trail by packets of wads.

Claims (5)

 1. Rotating spinning or twisting ring, characterized in that the annular wall (26) of the ring (8) which supports the track (6) for guiding the cursor (4) is pierced with a plurality of openings radial (34) discharge to the outside, by centrifugal effect, of impurities and fluff (30) accumulated on the inner face of said wall.  2. Rotating ring according to claim 1, characterized in that the openings are substantially equidistant along a circumference of the ring.  3. Rotating ring according to one of claims 1 and 2, characterized in that there is provided a fixed element (36) for unhooking the flocks, arranged outside the ring, adjacent thereto and s 'extending at least at the abovementioned openings (34).  4. Rotating ring according to claim 3, charac terized in that said fixed element (36) is integral with the slider cleaner (42).  5. Rotating ring according to any one of claims 1 to 4, characterized in that the aforementioned openings (34) are drilled in the zone of maximum internal diameter (D) of the annular wall (26) above.