JPH0424221A - Spinning equipment - Google Patents

Abstract

PURPOSE:To provide the title equipment capable of giving even yarns with high mechanical strength, so designed as to install a guide member with its tip directed to a rotary spindle within a nozzle block to act a swirling air stream on drafted fiber bundles and fix a supporting cylinder with a spherical form contacted with the fiber bundle passage. CONSTITUTION:A spinning equipment, provided at the rear of a drafting device, made up of (A) a spindle 6 rotating through a hollow cylindrical bearing 2 and bearings 4, 5 inside it and (B) a casing 3 for a rotator 9 is supported with a supporting plate 1, a guide member support 13 is fixed on the inner wall of a nozzle block 23 inside the casing 3, and fiber bundles delivered through the gap 24 from the drafting device are put to suction into the spinning equipment, false-twisted by the action of a swirling air stream near the inlet 6a of the spindle 6, and introduced into the fiber passage of the spindle 6 through a guide member 22 installed with its tip directed the center of the inlet of said spindle 6. The bundles are then held with a supporting cylinder 32 with a fixed spherical form 31 contacted with the inside of said passage and twisted under swinging, thus obtaining spun yarns.

Description

Detailed Description of the Invention 10. Purpose of the Invention [Field of Industrial Application] The present invention provides an apparatus for producing spun yarn by heating a silent short fiber bundle drafted by a drafting device by applying a swirling air current to the silent short fiber bundle. It is related to.

[Conventional technology]

As a conventional pneumatic spinning device, the following spinning device is known (see Japanese Patent Laid-Open No. 85123/1983).

This device includes a rotating spindle that has a passage through which the fiber bundle exits from the front roller of a draft device, and an air injection nozzle that applies a swirling air flow near the inlet of the spindle to separate the fiber ends from the fiber bundle. The fiber ends are wound around the fiber bundle.

[Problem to be solved by the invention]

The yarn produced by the above-mentioned conventional spinning equipment has a structure in which other fibers are spirally wound around a core fiber that is untwisted or twisted, and most of the fibers are twisted. The appearance is different and the thread strength is lower than that of the ring thread.

An object of the present invention is to provide an apparatus capable of producing yarn having characteristics similar to those of ring yarn using such an air spinning apparatus.

8. Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the spinning device of the present invention is arranged in a nozzle block that applies a swirling airflow to the fiber bundle exiting the draft device, and It has a guide member directed toward the center of the inlet of the rotating spindle, a support tube is fixed in the fiber bundle passage of the spindle, and the sphere is brought into contact with the support tube.

[For production]

In the spinning device configured as described above, the fiber bundle exiting the draft device is sucked into the nozzle block, exposed to swirling airflow near the spindle inlet, and is slightly twisted. At this time, all the fibers of the fiber bundle are located around the guide member and are directly exposed to the air flow and are subjected to a force separating them from the fiber bundle, but the tips of the fibers at the entrance position of the spindle are subjected to false twisting. Because of this, it does not separate easily.

The separated trailing ends of the fibers wrap around the outer periphery of the spindle and extend outward under the action of the air flow. As the fiber bundle travels, the fibers are gradually pulled out while turning around the fiber bundle, and most of the fibers are wound in a spiral shape to form a real twisted spun yarn.

The sphere in the fiber bundle passage rotates together with the rotating spindle, and the spun yarn is swung around while being held between the sphere and the support tube, thereby assisting in twisting.

〔Example〕

Embodiments of the spinning device of the present invention will be described with reference to the drawings.

As shown in FIG. 1, this spinning device tA includes a pair of back rollers 26 disposed following a sliver input guide 25;
It is arranged next to the draft part D which consists of a pair of middle rollers 28 having an apron 29 and a pair of front rollers 20. Note that the lines extending left and right in the figure are the running paths of the fiber bundle S or yarn Y, and 27 is a sliver width regulating guide.

The details of the spinning apparatus A will be explained with reference to FIG.

Reference numeral 1 denotes a support plate fixed to the frame, to which a hollow cylindrical bearing 2, a spindle 6, and a casing 3 of a rotating body 9 are fixed. This casing 3
It consists of a pair of split molds that are screwed together.

A spindle 6 is rotatably supported inside the bearing 2 via a hair ring 4.5, and a hollow pulley 7 is inserted into the outer periphery of the spindle 6.

Reference numeral 8 denotes an endless drive belt that is suspended along the unit in contact with the outer periphery of the pulley 7 and rotates the spindle 6 at high speed. A rotating body 9 is integrally provided at a position in front of the bearing 5 of the spindle 6.

A fiber bundle passage 10 is formed through the center of the spindle 6, and the center of the fiber bundle passage 10 and each center of the casing 3 are
Both are located on the same straight line that coincides with the running path of the fiber bundle S.

A support cylinder 32 that supports a sphere 31 is fixed in the fiber bundle passage 10. The side of the support tube 32 that receives the sphere 31 has a concave taper in the center.

In order to bring the sphere 31 into contact with the support tube 32, this spinning device A is used.
It is preferable to stand the fiber bundle inlet side up and use gravity, or make the sphere 31 made of iron and use a magnet to attract it to the support tube 32 side.

Further, the distance between the spindle head 6a and the nip point N of the front roller 20 is set to be shorter than the average length of the fibers constituting the fiber bundle S. The outer diameter of the inlet 6a of the spindle 6 is sufficiently small, and the portion following the inlet 6a is formed into a conical portion 6b whose outer diameter increases toward the rotating body 9.

The part of the casing 3 that covers the spindle 6 and the rotating body 9 has a small-diameter cylindrical hollow chamber 1 in the vicinity of the inlet 6a of the spindle 6.
1, and the part following this hollow chamber 11 is a conical hollow chamber 12 that opens at a large angle.The part in front of the small diameter hollow chamber 11 is slightly larger than the tip diameter of the spindle 6 by a nozzle block 23. It has a cylindrical shape with a diameter of
The cylindrical portion serves as a guide path for the fiber bundle S. In front of the conical hollow chamber 12, an annular hollow chamber 14 is formed, followed by a tangential air escape hole 15. An air suction pipe is connected to the air vent hole 5.

Inside the casing 3, a hollow air reservoir 6 is formed between it and the nozzle block 23. Nozzle block 23
Four air injection nozzles 17 are formed in the air reservoir 16 toward the inlet 6a of the spindle 6 and tangentially to the hollow chamber 11.
An air hose 19 is connected through the hole 18. The direction of the nozzle 17 is set to be the same as the rotational direction of the spindle 6.

The compressed air supplied from the hose 19 flows into the air reservoir 16 and then is ejected from the nozzle 17 into the hollow chamber 11 to generate a high-speed swirling air flow in the vicinity of the spindle port 6a.

This airflow swirls inside the hollow chamber 11, then diffuses outward while gently swirling inside the conical hollow chamber 12, is guided toward the escape hole 15, and is discharged. At the same time, this air flow generates a suction air flow that flows from the nip point N of the front roller 20 into the hollow portion of the casing 3.

21 is a cap fitted to the rear end of the bearing 2.

Further, a guide member support 13 is fixed to the inner wall of the nozzle lock 23. The guide member support 13 has a cylindrical shape with a conical protrusion at one end, and the negative side thereof is cut out to form a gap 24 between it and the nozzle lock 23, and the gap 24 is used as a guide for the fiber bundle S. It is used as a passageway. By causing one end of the guide member support 13 to protrude in a conical shape in this way, the fibers of the fiber bundle S supplied from the gap are less likely to wind around (and even if they wind around, the amount is very small and is easy to unravel. In addition, a hole that coincides with the center line of the spindle 6 passage lO is bored in the longitudinal direction of the guide member support 13, and a pin-shaped guide member 22 is inserted into the hole. The guide member 22 protrudes from the hole of the member support 13, leaving its tip free and facing the inlet 6a of the spindle 6. It is effective to make this guide member 22 conical like the guide member support 13.

According to this method of installing the guide member 22, since the entrance side of the apparatus is not blocked by the kite member 22, the entry of the fiber bundle S is not obstructed.

The guide member 22 has a diameter smaller than the passage diameter of the inlet 6a of the spindle 6, and has a smoothly curved tip.

The tip of the guide member 22 is shown in FIG. 2 at a position slightly inside the passage 10 from the entrance 6a of the spindle 6, and this state is most preferable, and the yarn to be manufactured is also the most ring yarn. It has a similar appearance. However, depending on the conditions, it is possible to produce a yarn with a 6a end and an appearance similar to a ring yarn. These yarns are comparable in strength to ring yarns. Note that the shape and installation method of the guide member 22 are not limited to those described above.

The guide member 22 functions as a so-called pseudo-core, which prevents the propagation of twist in the yarn forming process described later or temporarily takes the place of the central fiber bundle, and eliminates the disadvantages that appear conspicuously in conventional pneumatic bound spun yarns. This serves to prevent the formation of twisted core fiber bundles and virtually form yarns only from the wound fibers.

Next, the yarn manufacturing process using this actual twisted kite yarn manufacturing apparatus A will be explained.

The fiber bundle S that has been drafted by the draft device and sent out from the front roller 20 is drawn into the device by the air flow sucked from the gap 24 between the guide member support 13 and the nozzle lock 23. Prior to sending out the fiber bundle S from the roller 20, the inner end of the suction pipe (not shown) is brought into contact with the outlet 30 of the cap 21, creating an air flow sucked into the spindle 6. Therefore,
Due to this air flow, the fiber bundle S entering the gap 24 is smoothly sucked into the spindle 6.

The yarn sucked into the suction pipe through the spindle 6 is introduced into the splicing device by the movement of the suction pipe, and spliced with the yarn on the package side, which has also been introduced by the suction mouth.

The peripheral speed of the delivery roller provided downstream of the exit 30 of the cap 21 is set to be slightly higher than the peripheral speed of the front roller 20, and the peripheral speed of the delivery roller is set to be slightly higher than the peripheral speed of the front roller 20. , I try to maintain tension all the time.

The fiber bundle S is subjected to the action of a swirling compressed air flow near the inlet 6a of the spindle 6, and is slightly twisted in the same direction. At this time, the presence of the guide member 22 makes it impossible for the fiber bundle S to be located within the space occupied by the guide member 22. Therefore, all the fibers will be located around the guide member 22 and will be directly exposed to the air flow and will be separated from all around the entire outer periphery, and the fibers located inside will also be exposed to the air flow and the fiber bundle S receives the force of separation from However, when the tip of the fiber is at the inlet 6a position of the spindle 6, the tip is subjected to false twist as described above, and therefore is not easily separated. Further, the rear ends of the fibers are not separated yet because they are nipped by the front roller 20 or located far from the nozzle 17 and are not affected by air much. The rear end of the fiber is
It is separated from the fiber bundle S only after it leaves the front roller 20 and comes to a position where it is strongly exposed to the air flow from the nozzle 17. The separated rear ends of the fibers are wrapped around the input hole 6a of the spindle 6 once or multiple times by the action of the airflow, and then slightly wrapped around the conical part 6b of the spindle 6, and then guided to the rotating body 9. and extends outward.

The fiber bundle S continues to travel downward in FIG. 2, while the spindle 6 is rotating, so the trailing end of the fiber is gradually drawn out while turning around the fiber bundle S.

As a result, the fibers are spirally wound around the fiber bundle S, and the fiber bundle S becomes a spun yarn Y and passes through the fiber bundle passage 10. At this time, since the sphere 3 exists in the fiber bundle passage 10, the sphere 31 rotates together with the rotating spindle 6, so that the spun yarn Y is swung around while being held between the sphere 31 and the support cylinder 32. Swinging the thread Y in this way serves as an aid to twisting the thread.

The direction in which the wound fibers are wound is determined by the direction of the nozzle 17 and the direction of rotation of the spindle 6. The swirling direction of the airflow by the nozzle 17 is preferably set in the same direction as the rotation direction of the spindle 6 so as not to disturb the winding direction of the wound fibers and to prevent the fiber tips from separating.

As described above, according to the apparatus of this embodiment, the spindle 6
The false twist that is about to propagate to the front roller 20 side from
Its propagation is prevented by the guide member 22, and the fiber bundle S leaving the front roller 20 is not twisted by false twisting, and most of the fibers become wound fibers. This can be confirmed by the fact that when the guide member 22 is not installed, a striped portion in the traveling direction is generated near the center of the flat fiber bundle sent out from the front roller 20 in the roller width direction.

Here, the nozzle bronch diameter is 4.5mo+, and the nozzle diameter is 0.
Using a spinning device A with 8 nozzles and 4 nozzles with a spray angle of 45°, a 28G/Y cotton sliver was supplied, the spindle rotation speed was 30000 rpm, the sphere diameter was 5732 mm, the total draft was 60 times, and the yarn speed was 100 m/min. We tried producing spun yarn by varying the air pressure of the nozzle. and,
The count (Ne), yarn strength per Tex (g/Tex), twist coefficient, and U%, which is an index of yarn unevenness, of the spun yarns were measured. The results are as shown in FIG. According to this, the trends are generally as follows. That is, by putting the sphere 31 into the spindle 6, 1
) Thread strength increases. For example, the nozzle injection air pressure is 2
Even at kg/cd, it is possible to obtain yarn strength equivalent to or higher than the nozzle jet air pressure of 4 kg/crt when there is no sphere. These are the amount of air used (converted to 1 atm), and when the injection air pressure is 2 kg/cJ, it is 451/m
in, 901 for injection air pressure 4 kg/crl
/1n, and when converted to the amount of electricity used, each is 27
0W, 540W. Therefore, it is possible to obtain the same or higher yarn strength with half the energy consumption.

2) The twist coefficient increases. In other words, this means that the use of spheres improves the efficiency of twisting.

3) When the jet air pressure of the nozzle is not very high,
U%, that is, thread spots are reduced.

4) The count is large, that is, the thickness of the thread is increasing.

From these facts, it can be said that spun yarn with excellent characteristics can be produced without increasing the jet air pressure of the nozzle much.

Although this example describes a type of spinning device that uses a spindle to apply twist, other spinning devices, such as a two-nozzle type bundled spun yarn manufacturing device, may have a guide member provided at the first nozzle inlet, or Depending on the conditions, it is also possible to apply the present invention to a spinning device using a nip twister or a nozzle type spinning device.

C.9 Effects of the invention Since this invention is configured as explained above,
This produces the effects described below.

That is, it is possible to produce a real twisted yarn with an extremely large amount of wrapped fibers and comparable in appearance and strength to ring yarn.

Furthermore, even without increasing the air pressure ejected from the nozzle so much, spun yarn with excellent yarn strength and yarn unevenness can be produced, contributing to energy savings.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of a spinning device to which the device of the present invention is applied, FIG. 2 is a sectional view of the device of the present invention, and FIG. It is a figure showing physical properties. 6---- spindle, 6 a---- spindle inlet, 13--- guide member support, 17--- nozzle, 22--- guide member, 23...- nozzle block,
31---Sphere, 32---One support cylinder, D---m-
Draft device, S-one fiber bundle

Claims (1)

[Claims] 1. It is placed in a nozzle block that applies swirling airflow to the fiber bundle exiting the drafting device, has a guide member whose tip is directed toward the center of the inlet of the rotating spindle, and fixes the support cylinder within the fiber bundle passage of the spindle. A spinning device in which a sphere is brought into contact with a support tube.