JPH054444B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Purpose of the invention [Field of industrial application] The present invention provides a method for producing spun yarn by twisting a non-twisted short fiber bundle drafted by a drafting device by applying swirling air current. The invention relates to a device for manufacturing.

[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, see Japanese Patent Publication No. 53-45422). 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.
The false twisted fiber bundle is ballooned by the first nozzle, which causes some of the fibers to be wrapped around other fibers, and the fiber bundle passes through the second nozzle to be untwisted. The yarn is then tightly wound to produce a spun yarn.

Since this pneumatic spinning machine produces yarn using a false twisting and untwisting method, it has the disadvantage that the texture of the yarn produced is inevitably hard and poor. Additionally, this device has limitations in improving yarn quality because it is difficult to stabilize the behavior of the wrapped fibers, and because it uses two nozzles, it consumes a lot of compressed air, resulting in high energy costs. There is a problem. 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 has a property in which other fibers are spirally wound around a non-twisted or slightly twisted core fiber. Compared to ring yarn, where most of the fibers are twisted, the appearance is different and the yarn strength is 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.

B. Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the spinning device of the present invention has a tip in the nozzle block 23 that applies a swirling airflow to the fiber bundle S exiting the draft device D. Fixing the guide member support 13 projecting in a conical shape,
One side thereof is cut out to form a gap 24 between it and the nozzle block 23, and the tip of the guide member support 13 is provided with an inlet 6 for a rotary cylinder or a stationary spindle 6.
A guide member 22 is provided protrudingly with its tip facing the center a.

[Effect]

In the spinning device configured as above,
The fiber bundle S exiting the draft device D is sucked into the nozzle block 23 from the gap 24, and is passed through the spindle 6.
The fibers are exposed to swirling air currents near the inlet 6a and are 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 separated trailing ends of the fibers are wound around the outer periphery of the spindle 6 and extended outward by the action of the air flow. As the fiber bundle S travels, the fibers are gradually pulled out while turning 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, the spinning apparatus A includes a middle roller pair 2 having a back roller pair 26 and an apron 29, which are arranged following a sliver input guide 25.
8, it is arranged next to the draft part D consisting of 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 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 bearings 4 and 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 this passage 10 and each center of the casing 3 are located on the same straight line that coincides with the running path of the fiber bundle 7. Further, the distance between the spindle entrance 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 and the rotating body 9 has a small-diameter cylindrical hollow chamber 11 near the inlet 6a of the spindle 6, and a conical hollow chamber 12 that opens at a large angle in the part that follows this hollow chamber 11. It is said that

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 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, an annular hollow chamber 14 and an air escape hole 15 in the tangential direction following the annular hollow chamber 14 are formed. An air suction pipe is connected to this air escape hole 15.

Inside the casing 3, there is a nozzle block 23.
A hollow air reservoir 16 is formed between the two. The nozzle block 23 has four air injection nozzles 17 oriented from the air chamber 16 toward the inlet 6a of the spindle 6 and tangentially to the hollow chamber 11.
An air hose 19 is connected to the air reservoir 16 through a 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, creating a high-speed swirling air flow near the spindle inlet 6a.

After this airflow swirls inside the hollow chamber 11,
It diffuses outward while rotating gently within the conical hollow chamber 12, is guided toward the relief 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 onto the rear end of the bearing 2.

Furthermore, a guide member support 13 is fixed to the inner wall of the nozzle block 23. The guide member support 13 has a cylindrical shape with one end protruding conically, and one side of the guide member support 13 is cut out to form the nozzle block 2.
3, and the gap 24 is used as a guide path for the fiber bundle S. By making one end of the guide member support 13 protrude in a conical shape in this way, the fibers of the fiber bundle S supplied from the gap are difficult to wrap around, and even if they do wind up, the amount is very small and easy to unravel. Further, a hole is formed in the longitudinal direction of the guide member support 13 so as to coincide 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, and is connected to the inlet 6 of the spindle 6.
I am facing a. 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, 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 FIGS. 2 and 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 end face of 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 is conspicuous in conventional air-bound spun yarn. This serves to prevent the formation of a non-twisted core fiber bundle and virtually form a yarn using only the wound fibers.

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

The fiber bundle S drafted by the drafting device D and sent out from the front roller 20 passes between the guide member support 13 and the nozzle block 23.
However, before the fiber bundle S is sent out from the front roller 20, the tip of a suction pipe (not shown) is brought into contact with the outlet 30 of the cap 21, and the fiber bundle S is drawn into the apparatus by the air flow sucked from the spindle 6. An inward suction air flow is created. 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 is also mixed with the yarn on the package cage side, which is also introduced by the suction mouth. The threads are spliced.

The peripheral speed of the delivery roller provided on the downstream side of the outlet 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 provided on the downstream side of the exit 30 of the cap 21 is set to be slightly higher than the peripheral speed of the front roller 20. , so that tension is applied at all times.

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 f1 are located around the guide member 22, are linearly exposed to the air flow, and are subjected to forces that separate them from the fiber bundle S. However, the tip of the fiber f1 is at the entrance 6a of the spindle 6.
When in position, the tips are not easily separated because they are false-twisted as described above. Further, the rear end f1a of the fiber has not been separated yet because it is nipped by the front roller 20 or located far from the nozzle 17 and is not affected by much air as shown in FIG.

When the rear end f1a 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 f1 is separated from the fiber bundle S. At this time, the tip of the fiber f1 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 of the fiber f1 is hardly subjected to the false-twisting action.
Only fiber a is separated from the fiber bundle S. The separated fiber rear end f1a is moved to the spindle 6 by the action of air flow.
It wraps around the entrance 6a of the spindle 6 once or multiple times, and then wraps around the conical part 6b of the spindle 6 a little, and then 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 f1a
is gradually drawn out while swirling around the fiber bundle S.

As a result, the fibers f1a 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.

In the manufacturing process of this yarn Y, the fibers f1a 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. .
The winding direction of these wound fibers f1 is determined by 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 rotational direction of the spindle 6 so as not to disturb the winding direction of the wrapped fiber f1 and to prevent the fiber tips from separating.

As described above, according to the apparatus of this embodiment, the false twist that is about to propagate from the spindle 6 to the front roller 20 side is prevented from propagating by the guide member 22, and the fiber bundle S leaving the front roller 20 is prevented from propagating by the guide member 22.
There is no twisting caused by false twisting,
Most of the fibers are 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 is generated near the center of the flat fiber bundle sent out from the front roller 20 in the roller width direction.

It is most preferable that the tip of the guide member 22 enters the passage of the spindle 6 a little. The yarn produced under this condition has an appearance closest to that of a ring yarn, but a yarn having an appearance similar to a ring yarn can also be produced 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 Depending on the conditions, it is also possible to apply the present invention to a spinning device using a nip type twister or a one-nozzle type spinning device. Further, the spindle 6 assists in twisting the yarn, and some yarns can be manufactured even if the spindle 6 does not rotate, so the spindle 6 does not necessarily need to rotate.

C. Effects of the Invention Since the present invention is configured as described above, it 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, since one end of the guide member support 13 is conically protruded, the fibers are less likely to be wound around, and even if they are wound around, they are easy to unravel. Furthermore, according to this method of installing the guide member 22, the tip of the guide member 22 can be accurately faced to the center of the inlet 6a of the spindle 6, and the inlet side of the apparatus is not blocked, so that the fiber bundle S cannot enter. Do not disturb.

[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. 3 is a schematic diagram showing a spinning state by the device. 6...Spindle, 6a...Spindle inlet,
13... Guide member support, 17... Nozzle, 2
2... Guide member, 23... Nozzle block, 2
4...Material, D...Draft device, S...Fiber bundle.

Claims (1)

[Claims] 1. A guide member support 13 with a conically protruding tip is fixed in a nozzle block 23 that applies swirling airflow to the fiber bundle S exiting the draft device D, and one side of the guide member support 13 is cut out to connect it to the nozzle block 23. A gap 24 is formed therebetween, and an inlet 6a of a rotating or stationary spindle 6 is provided at the tip of the guide member support 13.
A spinning device in which a guide member 22 is provided protrudingly with its tip facing the center.