JPH052618Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention [Industrial application field] This invention creates a spun yarn by twisting the untwisted staple fiber bundle drafted by a drafting device by applying swirling airflow. 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, some of the fibers are wrapped around other fibers by the balloon, and the fiber bundle is passed through the second nozzle and 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 Application 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. In particular, as shown in FIG.
5 and 26 are provided at different levels in the front and rear. This serves to maintain the flat state of the fiber bundle that is flattened and sent out by the front roller.
Therefore, the ends of the guide plates 25 and 26 that come into contact with the fiber bundle protrude in a straight line so as to be lightly applied over the entire width of the flattened fiber bundle. In addition, 6 is a spindle, 17 is an air injection nozzle, 23
is the nozzle block.

[The problem that the idea aims to solve]

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. In addition, the movement of the sliver may be disturbed at the inlet of the device, which causes tension fluctuations and causes the sliver to break.

The purpose of this invention is to provide an apparatus that can produce yarn having the same characteristics as ring yarn using such a pneumatic spinning machine, and that does not cause sliver breakage.

B. Structure of the invention [Means for solving the problem] In order to achieve the above object, the device for producing real twisted wind yarn of this invention has an entrance slit 24, and the fiber bundle S exiting the drafting device D is provided with an inlet slit 24. The guide member 22 has one end fixed to a nozzle block 23 that applies a swirling airflow, and the other end directed toward the inlet 6a of a rotating or stationary spindle 6.

[Effect]

In the apparatus for producing real twisted yarn constructed as described above, the fiber bundle S exiting the draft device D is sucked into the nozzle block 23 from the inlet slit 24 in a stable state without any tension fluctuation, and is drawn into the nozzle block 23 by the spindle 6. exposed to swirling airflow near the inlet 6a of the
A little bit of false twist. 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 runs, the fiber bundle S
The yarn is gradually drawn out while swirling around the yarn, and most of the fibers are wound in a spiral, forming a real twisted spun yarn.

〔Example〕

An embodiment of the actual twist yarn manufacturing apparatus of this invention will be described with reference to the drawings.

As shown in FIG. 1, this real twist wind yarn manufacturing apparatus A is arranged following the sliver input guide 25.
It is arranged next to the 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. 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 actual twist yarn manufacturing 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, and is 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 S. 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 outer diameter of the portion following the inlet 6a is formed into a conical portion 6b that 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 11 near the inlet 6a of the spindle 6, and a conical hollow chamber that opens at a large angle in the part continuing from this hollow chamber 11. It is set at 12.

The portion in front of the small-diameter hollow chamber 11 is made cylindrical with a diameter slightly larger than the tip diameter of the spindle 6 by the nozzle block 23, and this cylindrical portion serves as a guide passage for the fiber bundle S. In front of the conical hollow chamber 12, there is formed an annular hollow chamber 14 and an air escape hole 15 in the tangential direction. 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 chamber 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 chamber 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.

Compressed air supplied from the hose 19 flows into the air chamber 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, as shown in FIGS. 2 and 3, the nozzle block 23 is formed with an inlet slit 24 for introducing the fiber bundle S. This entrance slit 24
extends in the nip line direction of the front roller 20,
The fiber bundle S which is flattened by the front roller 20 and sent out is received as it is. A guide member 22 is provided in the nozzle block 23 in the center of the passage 13, that is, in the direction along the flow of the fiber bundle S, and its tip faces the inlet 6a of the spindle 6 in a free state. The guide member 22 can also be fixed by bending one end and extending it out from the inlet 24 of the nozzle block 23.

Although the tip 22a 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. and can be set 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.

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 is drawn into the guide passage 13 by the airflow stably sucked from the inlet slit 24 of the nozzle block 23. Prior to sending out the fiber bundle S from the roller 20, the tip of a 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, the fiber bundle S entering the guide passage 13 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 directly 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 f1 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 f1 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 direction in which these wound fibers f1 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 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.

Most preferably, the tip of the guide member 22 extends slightly into the passage of the spindle 6. Although the yarn produced under this condition has an appearance closest to that of a ring yarn, it is also possible to manufacture a yarn having an appearance similar to that of 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 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 this invention is configured as explained above, it produces the following effects.

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 there is no tension variation in the sliver at the inlet of the device, there is no chance of sliver breakage.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of a spinning device to which the device of this invention is applied, Fig. 2 is a sectional view of the device of this invention, Fig. 3 is a schematic diagram showing the spinning state of the device, and Fig. 4 1 is a sectional view of a fiber bundle inlet portion in a conventional device. 6...Spindle, 6a...Spindle inlet,
17... Nozzle, 22... Guide member, 23...
Nozzle block, 24... Inlet slit, D...
Draft device, S... fiber bundle.

Claims (1)

[Scope of utility model registration request] A guide member 22 which has an inlet slit 24, has one end fixed to a nozzle block 23 that applies a swirling airflow to the fiber bundle S exiting the drafting device D, and has the other end directed toward the inlet 6a of the rotating or stationary spindle 6.
An apparatus for producing real twisted wind yarn.