JPH03241021A - Spinning equipment - Google Patents

Abstract

PURPOSE:To provide a spinning equipment capable of giving high-strength real-twist yarns with large number of twists, so designed that a guide member is installed, toward a spindle, in a nozzle block to act swirling air stream on drafted fiber bundles, and the tilt angle of the nozzle to the advancing direction of the fiber bundles is specified. CONSTITUTION:Fiber bundles S fed through a sliver-charging guide 25 are drafted with a drafting apparatus D made up of a group of rollers and put to suction into a spinning equipment A through a gap 24 which has been formed by notching one side of a guide member support 13 with its tip conically projected, fixed in a nozzle block 23 having a nozzle 17 to act swirling air stream. Subsequently, fibers f1, a part of the fiber bundles S, are separated with a swirling air stream ejected through the nozzle 17 with its tilt angle alpha to the advancing direction of the fiber bundles S set at 70 deg.<alpha<90 deg. near the tip of a guide member 22 projected with its tip toward the inlet of a spindle 6, and formed to spirally wind on the fiber bundles S in the spindle 6, thus obtaining spun yarns Y.

Description

Detailed Description of the Invention A1 Objective of the Invention [Industrial Application Field] This invention produces spun yarn by applying swirling airflow to a non-twisted short fiber bundle drafted by a drafting device and heating it. This relates to a device for

[Conventional technology]

Conventional spinning machines can be broadly classified into three types: ring type, open-end type, and pneumatic type.

Among these, pneumatic spinning machines have been developed in recent years, and are capable of spinning at speeds several times faster than ring-type spinning machines. This pneumatic spinning machine has two air injection nozzles arranged next to a draft device (for example, the Japanese Patent Publication No. 53-4
(See Publication No. 5422). Each of these nozzles applies a compressed air flow swirling in opposite directions to the fibers exiting the draft device, and the fiber bundle is false-twisted by the second nozzle, and the false-twisted fiber bundle is transferred to the first nozzle. The fibers are ballooned by a nozzle, some of the fibers are wound around other fibers by the balloon, and the fiber bundle is further passed through a second nozzle and untwisted to be tightly wound to produce a spun yarn.

Since this pneumatic spinning machine produces yarn using a false twisting and untwisting method, the yarn produced inevitably has a hard and poor texture. In addition, this device has limitations in improving yarn quality because it is difficult to stabilize the behavior of the fibers when wrapping, and because it uses two nozzles, it consumes a lot of compressed air, resulting in low energy costs. The problem is that it's big.

Furthermore, there are some difficulties in the ability to spin relatively long fibers such as wool.

In order to deal with this problem, the following spinning machine has been proposed (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 spinning machine disclosed in JP-A No. 63-85123 mentioned above has a property in which other fibers are spirally wound around a non-twisted or twisted core fiber. ,
Compared to ring yarn, where most fibers are twisted,
The appearance is different and the thread strength is also lower.

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 a pneumatic spinning machine.

1. Structure of the Invention [Means for Solving the Problem] In order to achieve the above object, the spinning device of the present invention includes a nozzle block having a nozzle 17 that applies a swirling airflow to the fiber bundle S exiting the draft device. 23, a guide member 22 is installed with its tip facing the inlet 6a of a rotating or stationary spindle 6, and the inclination angle α of the nozzle 17 with respect to the traveling direction of the fiber bundle S is set to 70° < α to 90°. be.

[For production]

In the spinning device configured as described above, the fiber bundle S exiting the draft device is sucked into the nozzle block 23, exposed to swirling airflow near the inlet 6a of the spindle 6, and is slightly twisted. At this time, all the fibers of the fiber bundle S are located around the guide member 22, are directly exposed to the air flow, and are subjected to a force that separates them from the fiber bundle S, but the tips of the fibers at the entrance 6a of the spindle 6 are , because it is false twisted, it does not separate easily. The rear end of the separated fiber is
Due to the action of the air flow, it wraps around the outer periphery of the spindle 6 and extends outward. As the fiber bundle S travels, the fibers
It is gradually drawn out while swirling around the fiber bundle S, and most of the fibers are wound in a spiral shape to form a real twisted spun yarn.

〔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 A is located next to a draft part D, which consists of a pair of back rollers 26, a pair of middle rollers 28 having an apron 29, and a pair of front rollers 20, which are arranged following a sliver input guide 25. It is located in 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.

2 is a support plate fixed to the frame, to which are fixed a hollow cylindrical bearing 2, a nozzle block 23, a bush 31 following it, a spindle 6, and a casing 3 of a rotating body 9. This casing 3 is composed of a pair of front and rear split molds, which are screwed together.

A spindle 6 is rotatably supported inside the bearing 2 via a bearing 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. At a position in front of the bearing 5 of the spindle 6, a rotating body 9 is provided in a −' body.

A fiber bundle passage 1O is formed through the center of the spindle 6, and the center of this 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. The distance from the spindle 6a to the front roller 20 is approximately 80% of the average fiber length of 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 that covers the spindle 6 and the rotating body 9 is the part that covers the spindle 6
A bush 31 forms a small-diameter cylindrical hollow chamber 1 in the vicinity of the population 6a, and the portion following this hollow chamber 11 forms a conical hollow chamber 12 that opens at a large angle. The area in front of the small-diameter hollow chamber 11 is formed into a cylindrical shape with a diameter slightly larger than the tip end diameter of the spindle 6 by a nozzle block 23, and the cylindrical portion serves as a guide passage for the fiber bundle S. In front of the conical hollow chamber 12 is an annular hollow chamber 1.
4 and a tangential air escape hole 15 following it. An air suction pipe is connected to this air escape hole 15.

Inside the casing 3, a hollow air reservoir 16 is formed between it and the nozzle block 23. Nozzle block 23
Four air injection nozzles 17 are formed in the air chamber 16 toward the inlet 6a of the spindle 6 and tangentially to the hollow chamber 11. The air hose 19 is then connected. 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 IJ, creating a high-speed swirling air flow near 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 opening I5, 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.

Reference numeral 21 denotes a cap fitted to the rear end of the bearing 2, and 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 one end protruding conically, and the negative side thereof is cut out to form a gap 24 between the guide member support 13 and the nozzle lock 23.
is used as a guide path for the fiber bundle S. 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. Further, a hole is formed in the longitudinal direction of the guide member support 13, and the hole coincides with the center line of the spindle 6 passage 10, and a pin-shaped guide member 22 is inserted into the hole. The guide member 22 protrudes from the hole of the guide member support 13 and has a free end facing the entrance 6a of the spindle 6. This guide member 22 also has a guide member support 1
Similar to 3, it is effective to make it conical.

According to this method of installing the guide member 22, the entrance side of the apparatus is not blocked by the guide member 22, so that the entrance 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.

Although the tip of the guide member 22 is shown in FIG. 2.3 at a position slightly inside the passage 10 from the inlet 6a of the spindle 6, it is also possible to take a position away from the inlet 6a. It is possible to set it at an appropriate position according to each condition.

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.

In the spinning apparatus described above, the fiber bundle S of the nozzle 17
Yarns were manufactured by varying the inclination angle α with respect to the traveling direction from 45° to 90°.

However, at this time, even if the inclination angle α of the nozzle 17 is changed, the jetted air flow is always blown out near the inlet of the spindle 6. Further, the diameter of the nozzle 17 is 0.8 mm, and the injection air pressure from the nozzle 17 is 4 kg/ai.

Looking at the results, it can be seen that as the inclination angle α of the nozzle 17 increases, the fiber wrapping angle of the produced yarn becomes larger.

That is, the number of twists of the thread becomes large. In order to obtain a yarn with a satisfactory number of twists, the inclination angle α of the nozzle 17 was 70 to 90°.

In order to obtain the same number of twists, as the inclination angle α increases, the nozzle 17
The amount of air injected can be reduced.

Further, by preparing several nozzles 17 with different inclination angles α, it is possible to obtain the number of twists suitable for the target yarn.

Next, the yarn manufacturing process by the spinning apparatus A will be explained.

Drafted by draft device 1tD, front roller 2
The fiber bundle S sent out from the guide member support 13
The airflow sucked from the gap 24 between the front roller 20 and the nozzle lock 23 draws the fiber bundle S into the apparatus. This creates an air flow that is drawn into the spindle 6. Therefore, the fiber bundle S entering the gap 24 is smoothly sucked into the spindle 6 by this air flow.

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 outlet 30 of the cap 21 is set 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 fl will be located around the guide member 22 and will be directly exposed to the air flow and will be subjected to forces that separate them from the fiber bundle S. However, when the tip of the fiber fl is at the inlet 6a position of the spindle 6, the tip is not easily separated because it is subjected to false twist as described above. In addition, the rear end rta of the fiber
is not separated yet because it is nipped by the front roller 20 or located far from the nozzle 17, as shown in FIG. 3, and is not affected by air much.

When the rear end fla of the fiber leaves the front roller 20 and comes to a position where it receives a strong air flow from the nozzle 17, the fiber fl is separated from the fiber bundle S. At this time, the tip of the fiber fl is partially false-twisted, and because it is inserted into the spindle 6 where the action of air is small, it does not separate, and the rear end rta of the fiber is hardly subjected to the false-twisting action. only is separated from the fiber bundle S. The separated fiber rear end rta is wound around the inlet 6a of the spindle 6 once or multiple times by the action of the air flow, and then wrapped around the inlet 6a of the spindle 6.
After wrapping a little around the conical part 6b, it is guided by the rotating body 9 and extends outward.

The fiber bundle S continues to run to the left in the figure, and on the other hand, since the spindle 6 is rotating, the fiber rear end fi11 moves toward the fiber bundle S.
It is gradually pulled out while circling around it.

As a result, the fiber "1" is 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.

In the manufacturing process of this yarn Y, the fibers fl are separated from all over the entire outer periphery of the fiber bundle S, and the fibers located inside are also exposed to the air flow and separated, so that the fibers are further separated from the guide member 22. Since the fibers are located on the outer periphery, a large number of fibers are continuously separated. These separated fibers are evenly distributed in the conical part 6b of the spindle 6, and there are almost no core fibers, and most of the fibers are twisted and wound to form a real twisted yarn. Become. The direction in which these wound fibers fl are wound is determined by the direction of the nozzle I7 and the direction of rotation of the spindle 6. The swirling direction of the air flow by the nozzle 17 does not disturb the winding direction of the wrapped fiber fl,
Also, to prevent the fiber tips from separating, spindle 6
It is preferable to set it in the same direction as the rotation direction of.

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 running direction appears near the center of the flat fiber bundle sent out from the front roller 20 in the roller width direction.

Most preferably, the tip of the guide member 22 extends slightly into the passage of the spindle 6. The yarn produced under this condition has an appearance closest to that of a ring yarn, but it is also possible to manufacture a yarn having an appearance similar to a ring yarn under other conditions. These yarns are comparable in strength to ring yarns.

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 Application to a spinning device using a nip type twister or a one-nozzle type spinning device is also possible depending on the conditions. Further, the spindle 6 assists in twisting the yarn, and since some yarns can be manufactured without rotating, the spindle 6 does not necessarily need to rotate.

C1 Effect 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.

Further, since the inclination angle α of the nozzle 17 is set to 70°<α<90°, a yarn with a high number of twists can be manufactured without increasing the amount of air jetted from the nozzle 17. Further, by preparing several nozzles 17 with different inclination angles α, it is possible to obtain the number of twists suitable for the target yarn.

[Brief explanation of drawings]

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. 3 is a schematic diagram showing a spinning state by the device. 6---Spindle, 6a Spindle inlet, 11-
Guide member support, 17- nozzle, 22 guide member, 23 nozzle block, D draft device, S-
fiber bundle,

Claims (1)

[Claims] 1. A guide member 22 is installed in a nozzle block 23 having a nozzle 17 that applies a swirling airflow to the fiber bundle S exiting the drafting device D, with its tip facing the inlet 6a of the rotating or stationary spindle 6, and the nozzle A spinning device in which the inclination angle α with respect to the traveling direction of the fiber bundle S of 17 is 70°<α<90°.