GB2228747A - Producing twisted staple fibre thread by centrifugal spinning - Google Patents
Producing twisted staple fibre thread by centrifugal spinning Download PDFInfo
- Publication number
- GB2228747A GB2228747A GB9004454A GB9004454A GB2228747A GB 2228747 A GB2228747 A GB 2228747A GB 9004454 A GB9004454 A GB 9004454A GB 9004454 A GB9004454 A GB 9004454A GB 2228747 A GB2228747 A GB 2228747A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thread material
- thread
- spindle
- centrifugal spindle
- centrifugal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
1 t --- -7 C's METHOD OF, AND APPARATUS FOR, TREATING PARTLY TWISTED
THREAD MATERIAL This invention relates to a method of, and an apparatus for, feeding or pulling partly twisted fibre or thread material, temporarily stored by a centrifugal spindle of a spinning machine for the production of staple fibre yarn.
It is known to manufacture staple fibre yarn by imparting twist in two stages by means of a drawing frame co-operating with centrifugal spindles and spooling units. The first twist is imparted to the material as it passes between the outlet from the feed position and a centrifugal spindle and the second twist is imparted as the material passes between the centrifugal spindle to the spooling unit. According to DE-OS 2 229 263, to produce one completed spool, several fillings of partly twisted thread material from a centrifugal spindle are required. The pulling-off of the partly twisted thread material is done by cutting the thread coming from the feed position and connecting the resultant free end of the thread with the free end of thread situated on the spool, and by the partly twisted thread material situated in the centrifugal spindle being pulled off while the rotation of the centrifugal spindle is maintained.
In the method according to WP 22 772, it is merely 2 stated that after the filling of the centrifugal spindle the thread material is transferred to the spooling unit. None of these known descriptions indicates how and with what means the process of transferring the thread material from the centrifugal spindle to the spooling unit can be carried out rationally in a manner assuring correct quality. Practice requires that, during the period necessary for the transfer, the thread material released at the feed position is already being pulled out of the centrifugal spindle at approximately the spooling speed, because otherwise the piece of thread held between the revolving centrifugal spindle and a clamping point would be overwound or indeed twisted right off.
It is disadvantageous also, as disclosed by WP 22 772, to impart the remaining twist to the thread material directly between the centrifugal spindle and the spooling unit because, on account of the mechanisms required for the spooling, sudden fluctuations in thread stress cannot entirely be prevented. Consequently, in the pulling of the thread material from the centrifugal spindle, several layers of thread can be torn away and thus form loops in the thread. It is also a drawback that if a thread breaks between the-centrifugal spindle and the spooling unit, it is impossible to rectify the breakage because the end of the thread nearest the centrifugal spindle jumps back into this spindle.
1 1 1 k - f J1 3 It is an object of the present invention to eliminate the afore-mentioned defects and to provide a method of and apparatus for feeding partly twisted thread material to the spool(s) reliably and virtually free of thread breakages, and thus to improve the quality of the spooling process and largely to eliminate lost time.
In its broadest aspect, the present invention, reverses the direction of travel of the partly twisted thread material coming from the feed position suddenly for the purpose of spooling, thereby to cut the thread material and to pull the released thread at approximately spooling speed continuously out of the centrifugal spindle and guide it towards the spooling unit.
The invention provides a method of feeding or pulling partly twisted thread material which is to be temporarily stored by a centrifugal spindle of a spinning machine for the production of staple fibre yarn by imparting twist in two stages using a drawing frame, a centrifugal spindle and a spooling unit; said method comprising guiding the thread material in a path between a feed point and a thread guiding tube to the centrifugal spindle, subjecting the thread material to sudden clamping at a clamping zone to deflect the material from its said path to cut the material at or near the feed point and pulling the partly twisted thread material in opposition to the direction of feed to the centrifugal spindle towards the spooling unit to impart a final twist 4 between the clamping zone and the still revolving centrifugal spindle.
The invention also provides apparatus for feeding or pulling partly twisted thread material which is to be temporarily stored by a centrifugal spindle of a spinning machine for the production of staple fibre yarn by imparting twist in two stages using a drawing frame, a centrifugal spindle and a spooling unit; said apparatus comprising a pulling mechanism composed of a pair of rolls which can be relatively moved together or apart, said mechanism being disposed between a feed point and the centrifugal spindle and a thread guiding injector disposed in the vicinity of the rolls; whereby the rolls are moved together to suddenly clamp the thread material passing between the feed point and the spindle to deflect and cut the thread material and the injector draws in the thread material to impart a final twist to the thread material.
The invention is explained in greater detail with reference to the following description and the accompanying drawings, wherein:
Figure 1 is a schematic elevation of apparatus constructed in accordance with the invention'showing the path of the thread with the pulling mechanism in the open position; and Figure 2 is the same view as Figure 1 but at 1 initiation of the spooling phase and with the pulling mechanism closed.
As shown in the drawing, apparatus in accordance with the invention employs a thread pulling mechanism composed of rolls 3,4 relatively movable together or apart into closed or open positions relative to fibre or thread material 2. In Figure 1 the fibre or thread material 2 distorted at a feed position or outlet 1, also composed of rollers, passes from the feed position 1 on a straight path through the opened pulling mechanism 3,4 through a thread guiding tube 5 and into a centrifugal spindle 6 where it is laid up to form a coil 7. In this example, the roll 3 is driven and is stationarily journalled, whereas the roller 4 is so arranged that it can swing in from time to time onto the feed roll 3. When the coil 7 built up in the centrifugal spindle 6 has reached the desired mass of thread material 2, as shown in Figure 2, the feed roller 4 is released by means, not shown, and is suddenly pivoted onto the feed roll 3, which is rotating. The twist imparted to the thread material 2 by the rotating centrifugal spindle 6 can only run as far as the clamping zone 8 between the rolls 3,4 and no longer as far as the clamping zone 9 at the feed position outlet l.' The thread material is thereby cut at the feed position outlet 1. With the sudden pressing-on of. the roll 4, the forming of a coil is prevented, and the free end of the thread material 2 is conducted, by 6 the conveying movement of the rolls 3,4, in opposition to the direction of movement of the thread material 2 during the feed phase, and into the region of the inlet of a thread guiding injector 10. This operation is promoted by the pivoted-on feed roll 4, which, in the sudden pivoting-on movement, deflects the thread material 2 through an angle&Ckrelative to the feed axis. The thread end is gripped by the thread guiding injector 10 and is guided towards a spooling unit (not shown) for the spooling stage. The partly twisted thread material 2 now receives the final twist between the still revolving centrifugal spindle 6 and the clamping zone 8 of the rolls 3,4. The final twist is dependent on the ratio of the rotational speed of the spindle 6 to the conveying speed of the thread 2. The pulling-off speed is kept constant, so that as the individual layers of thread of the coil 7 are pulled off, no faults occur. The distorted fibre material that continues to be delivered meantime from the feed position is picked up by a suction unit 11 at the outlet position 1. It is more rational, however, to interrupt the supply of fibre'with a conventional fibre material stop device upstream e.g. at the entry to the position 1.
After the spooling phase has been completed, the feed roller 4 is pivoted back into the starting position, and a new feed phase can commence.
1 f- 4 7
Claims (4)
1. A method of feeding or pulling partly twisted thread material which is to be temporarily stored by a centrifugal spindle of a spinning machine for the production of staple fibre yarn by imparting twist in two stages using a drawing frame, a centrifugal spindle and a spooling unit; said method comprising guiding the thread material in a path between a feed point and a thread guiding tube to the centrifugal spindle, subjecting the thread material to sudden clamping at a clamping zone to deflect the material from its said path to cut the material at or near the feed point and pulling the partly twisted thread material in opposition to the direction of feed to the centrifugal spindle towards the spooling unit to impart a final twist between the clamping zone and the still revolving centrifugal spindle.
2. A method of feeding or pulling partly twisted thread material substantially as described with reference to, and as illustrated in the accompanying drawing.
3. Apparatus for feeding or pulling partly twisted thread material which is to be temporarily stored by centrifugal spindle of a spinning machine for the 8 production of staple fibre yarn by imparting twist in two stages using a drawing frame, a centrifugal spindle and a spooling unit; said apparatus comprising a pulling mechanism composed of a pair of rolls which can be relatively moved together or apart, said mechanism being disposed between a feed point and the centrifugal spindle and a thread guiding injector disposed in the vicinity of the rolls; whereby the rolls are moved together to suddenly clamp the thread material passing between the feed point and the spindle to deflect and cut the thread material and the injector draws in the thread material to impart a final twist to the thread material.
t
4. Apparatus substantially as described with reference to, and as illustrated in, the accompanying drawing.
1 Publiched 1990 atThe Patentomce, State House. 68 71 High Rjlbnm3,ondon WC1R 4TP.Purther opples maybe obtained from The Patent Ofnee. Sales Branch, St Mary -3ray. Orpington, Rent BR5 3RD. Printed by Multiplex techniques ltd. St MLrj Cray. Kent. Con. 1.57
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD89326115A DD285516A7 (en) | 1989-03-01 | 1989-03-01 | METHOD AND DEVICE FOR REMOVING PART-DRIVEN THREAD MATERIAL FROM A CENTRIFUGAL SPINDLE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9004454D0 GB9004454D0 (en) | 1990-04-25 |
| GB2228747A true GB2228747A (en) | 1990-09-05 |
Family
ID=5607380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9004454A Withdrawn GB2228747A (en) | 1989-03-01 | 1990-02-28 | Producing twisted staple fibre thread by centrifugal spinning |
Country Status (4)
| Country | Link |
|---|---|
| DD (1) | DD285516A7 (en) |
| DE (1) | DE4002308A1 (en) |
| GB (1) | GB2228747A (en) |
| IT (1) | IT1244041B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB779773A (en) * | 1954-08-20 | 1957-07-24 | Carlos Pujol | A device for the spinning, twisting or doubling of textile fibres |
| GB1414983A (en) * | 1972-02-01 | 1975-11-26 | Dunlop Ltd | Apparatus and method for forming twisted filamentary materials |
-
1989
- 1989-03-01 DD DD89326115A patent/DD285516A7/en unknown
-
1990
- 1990-01-26 DE DE4002308A patent/DE4002308A1/en not_active Withdrawn
- 1990-02-16 IT IT04763890A patent/IT1244041B/en active IP Right Grant
- 1990-02-28 GB GB9004454A patent/GB2228747A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB779773A (en) * | 1954-08-20 | 1957-07-24 | Carlos Pujol | A device for the spinning, twisting or doubling of textile fibres |
| GB1414983A (en) * | 1972-02-01 | 1975-11-26 | Dunlop Ltd | Apparatus and method for forming twisted filamentary materials |
Also Published As
| Publication number | Publication date |
|---|---|
| IT9047638A0 (en) | 1990-02-16 |
| IT1244041B (en) | 1994-07-01 |
| GB9004454D0 (en) | 1990-04-25 |
| DE4002308A1 (en) | 1990-09-06 |
| IT9047638A1 (en) | 1991-08-16 |
| DD285516A7 (en) | 1990-12-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |