JPH069028Y2 - Spinning equipment - Google Patents

Description

[Detailed Description of Device] a. Purpose of the Invention [Field of Industrial Application] The present invention relates to a device for producing a spun yarn by twisting an untwisted short fiber bundle drafted by a drafting device by causing a swirling air flow to act on it.

[Conventional technology]

A spinning device described below is known as a conventional pneumatic spinning device (see Japanese Patent Laid-Open No. 63-85123).

This device has a spindle that has a passage through which a fiber bundle comes out of a front roller of a draft device and rotates, and an air injection nozzle that causes a swirling air flow to act near the inlet of the spindle to separate the fiber end from the fiber bundle. The fiber ends are wound around the fiber bundle.

[Problems to be solved by the device]

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

It is an object of the present invention to provide a device capable of producing a yarn having characteristics similar to those of a ring yarn in such a pneumatic spinning device.

B. Configuration of the Invention [Means for Solving the Problems] In order to achieve the above object, a spinning device according to the present invention is a spindle that rotates or stands still in a nozzle block that causes a swirling air flow to act on a fiber bundle exiting a draft device. The guide member is installed with the tip facing the inlet of the nozzle, the annular bush is provided downstream of the nozzle block, the outer diameter D of the tip of the spindle, its inner diameter d, and the distance δ from the spindle inlet to the inlet side end surface of the bush. The relation between (the spindle inlet is upstream from the inlet side end surface of the bush) and the inner diameter r of the nozzle block is r / D = 1 to 3 D / d = 1.5 to 3 −2 <δ < 2 (mm).

[Action]

In the spinning device configured as described above, the fiber bundle exiting the draft device is sucked into the nozzle block, exposed to the swirling airflow in the vicinity of the inlet of the spindle, and slightly false twisted. At this time, all the fibers of the fiber bundle are located around the guide member, directly exposed to the air flow, and subjected to the force of separating from the fiber bundle, but the tip of the fiber at the spindle inlet position is false twisted. Therefore, it is not easily separated. The separated rear end of the fiber is wound around the outer periphery of the spindle by the action of the air flow and extends outward. The fibers are
As the fiber bundle travels, it is gradually pulled out while turning around the fiber bundle, and most of the fibers are wound in a spiral shape,
It becomes a spun yarn with a real twist.

〔Example〕

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

As shown in FIG. 1, the spinning device A includes a back roller pair 26, a middle roller pair 28 having an apron 29, and a front roller pair 20, which are arranged subsequent to the sliver feeding guide 25, and are arranged next to the draft part. It is arranged. In addition, a line extending to the left and right in the figure is a traveling path of the fiber bundle S or the yarn Y, and 27 is a sliver width regulation guide.

The spinning device A will be described in detail with reference to FIG.

Reference numeral 1 denotes a support plate fixed to a frame, to which a hollow cylindrical bearing 2, a nozzle block 23, a bush 31 following the nozzle block 23, a spindle 6, and a casing 3 of a rotating body 9 are fixed. The casing 3 is composed of a pair of front and rear split molds and is screwed.

A spindle 6 is rotatably supported inside the bearing 2 via bearings 4 and 5, and a hollow pulley 7 is attached to the outer periphery of the spindle 6.

Reference numeral 8 is an endless drive belt that contacts the outer periphery of the pulley 7 and is suspended along the unit to rotate 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 passage 10 and the center of the casing 3 are
Both are located on the same straight line that coincides with the traveling path of the fiber bundle S. The outer diameter of the inlet 6a of the spindle 6 is sufficiently small,
The portion following the inlet 6a is formed as a conical portion 6b whose outer diameter increases toward the rotating body 9. The portion 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 with a bush 31.
The portion following the hollow chamber 11 is a conical hollow chamber 12 opened at a large angle.

The front of the small-diameter hollow chamber 11 is made into a cylindrical shape having a diameter slightly larger than the tip diameter of the spindle 6 by the 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 a tangential air escape hole 15 following it are formed. An air suction pipe is connected to the air escape hole 15.

Inside the casing 3, a hollow air reservoir 16 is formed between the casing 3 and the nozzle block 23. Nozzle block 23
Is formed with four air injection nozzles 17 that are directed from the air chamber 16 toward the inlet 6a of the spindle 6 and are tangential to the hollow chamber 11, and the air reservoir 16 is
An air hose 19 is connected through the hole 18. The direction of the nozzle 17 is set to be the same as the rotation 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 inlet 6a.

After swirling in the hollow chamber 11, this air flow diffuses outward while gently swirling in the conical hollow chamber 12, is guided to 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.

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

Further, the guide member support 13 is fixed to the inner wall of the nozzle block 23. The guide member support 13 has a columnar shape with one end protruding in a conical shape, and one side thereof is cut out to form a gap 24 with the nozzle block 23.
The gap 24 serves as a guide passage for the fiber bundle S. By making one end of the guide member support 13 project in a conical shape in this manner, the fibers of the fiber bundle S supplied from the gap are less likely to be wound, and even if wound, it is easy to unravel because it is extremely small. Further, a hole matching the center line of the spindle 6 passage 10 is formed in the longitudinal direction of the guide member support body 13, 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 its tip free, and faces the inlet 6 a of the spindle 6. It is effective that the guide member 22 also has a conical shape like the guide member support body 13.
According to such a method of installing the guide member 22, the entrance side of the device is not blocked by the guide member 22, so that the fiber bundle S is prevented from entering.

The guide member 22 has a diameter smaller than the passage diameter of the inlet 6a of the spindle 6, and has a tip formed with a smooth curve.

2 and 3, the tip end of the guide member 22 is shown at a position slightly entering the inside of the passage 10 from the inlet 6a of the spindle 6, but it is also possible to take a position away from the end face of the inlet 6a. Yes, it can be set at an appropriate position according to each condition.

The guide member 22 functions as a so-called pseudo core that prevents the propagation of twist in the yarn forming process described later or temporarily substitutes for the central fiber bundle, and does not appear remarkably in the conventional air-bonded spun yarn. It functions to prevent the formation of a twisted core fiber bundle and to form a yarn from only the wound fibers.

In the spinning device described above, the outer diameter D of the tip of the spindle 6, its inner diameter d, and the distance δ from the spindle inlet 6a to the inlet end surface of the bush 31 (when the spindle inlet 6a is upstream of the inlet end surface of the bush 31) Is the plus and the opposite is the minus) and the nozzle block 2
The inner diameter r of 3 is variously changed, and the cotton draft of 28 gelen is used, the total draft of the draft device is 82, the number of rotations of the spindle 6 is 60800 rpm, the diameter of the nozzle 17 is 0.8 mm,
Air pressure from the nozzle 17 is 4 kg / cm ² , yarn speed is 10
A spun yarn was produced at 0 m / min.

The results are summarized as follows: When the condition of r / D = 1 to 3 D / d = 1.5 to 3 −2 <δ <2 (mm) is satisfied, both the strength / elongation property of the yarn and the yarn unevenness property are satisfied. It has been found that it is possible to produce spun yarn of true twist which is capable of

In addition, r = 5 (mm), D = 3 (mm), d = 1.8 (m
When m) and δ = -0.5 (mm), it was possible to produce a spun yarn with a true twist that had the highest strength and was balanced.

Next, a yarn manufacturing process by the real twist wind yarn manufacturing apparatus A will be described.

The fiber bundle S drafted by the draft device D and sent out from the front roller 20 is drawn into the device by the air flow sucked from the gap 2 between the guide member support 13 and the nozzle block 23. Prior to the delivery of the fiber bundle S from the roller 20, the tip end of the suction pipe (not shown) is brought into contact with the outlet 30 of the cap 21 to generate an air flow to be sucked 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 yarn splicing device by the movement of the suction pipe, and is also spliced with the yarn on the package side introduced by the suction mouth.

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 with respect to the fiber bundle S passing through the device A during spinning. , I always try to apply tension.

The fiber bundle S is subjected to the action of the compressed air flow that swirls in the vicinity of the inlet 6a of the spindle 6, and is slightly twisted in the same direction. At this time, the fiber bundle S cannot be positioned in the space occupied by the guide member 22 due to the existence of 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 the force of separating from the fiber bundle S. However, when the tip of the fiber f1 is located at the inlet 6a position of the spindle 6, it is not easily separated because it has undergone false twisting as described above. Also, the rear end f1a of the fiber is
As shown in FIG. 3, it is not separated yet because it is nipped by the front roller 20 or is located far from the nozzle 17 and is not affected by air so much.

When the rear end f1a of the fiber separates from the front roller 20 and comes to a position where the air flow from the nozzle 17 is strongly received,
The fiber f1 is separated from the fiber bundle S. At this time the fiber f1
The fiber rear end f1a, which is not subjected to false twisting, is not separated because the tip of the fiber is partially false twisted and is not separated because it is inserted into the spindle 6 that is less affected by air.
Only the fibers separate from the fiber bundle S. Fiber rear end f1a isolated
Is at the inlet 6a of the spindle 6 due to the action of the air flow.
It is wound once or a plurality of times and then slightly wound around the conical portion 6b of the spindle 6, and then guided outward by the rotating body 9.

The fiber bundle S continues to run to the left in the figure, while the spindle 6 is rotating, so the fiber rear end f1a is gradually pulled out while turning 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 the spun yarn Y and passes through the fiber bundle passage 10.

In the manufacturing process of the yarn Y, the fibers f1 are separated from all over the outer circumference of the fiber bundle S, and the fibers located inside thereof are also exposed to the air flow and separated, so that the fibers are further separated from the guide member 22. Since it is located on the outer circumference, a large number of fibers are continuously separated. These separated fibers are
The fibers are evenly distributed to the conical portion 6b of the spindle 6, and there is almost no core fiber, and most of the fibers are twisted and wound to form a real twist yarn. The winding direction of these wound fibers f1 is determined by the direction of the nozzle 17 and the rotation direction of the spindle 6. The swirling direction of the air flow by the nozzle 17 is preferably set in the same direction as the rotation direction of the spindle 6 so that the winding direction of the wound fiber f1 is not disturbed and the tip of the fiber is not separated.

As described above, according to the apparatus of this embodiment, the spindle 6
False twist that is about to propagate from the
Most of the fibers become wound fibers without being prevented from being propagated by the guide member 22 and the fiber bundle S that has exited the front roller 20 is not twisted by false twist. This means that when the guide member 22 is not installed,
This can be confirmed by the fact that a streak portion in the running direction is formed near the center of the flat fiber bundle fed from the front roller 20 in the roller width direction.

Most preferably, the tip of the guide member 22 slightly enters the passage of the spindle 6. The yarn produced in this state has an appearance that is closest to the ring yarn, but a yarn having an appearance that is similar to the ring yarn can be produced under other conditions. These yarns are comparable in strength properties to ring yarns.

In addition, in this embodiment, a device of twisting with a spindle has been described, but a guide member is provided at the first nozzle inlet of another spinning device, for example, a two-nozzle type spun yarn producing device, or a nozzle is used. The application to a spinning device using a nip type twister and a one-nozzle type spinning device may be possible depending on conditions. Further, the spindle 6 does not necessarily have to rotate because the spindle 6 assists in twisting the yarn and can be manufactured depending on the yarn even if it does not rotate.

C. Effect of the Invention Since the invention is configured as described above,
The following effects are achieved.

That is, it is possible to produce a yarn of actual twist, which has an extremely large amount of wrapped fiber and is comparable to the ring yarn in appearance and tenacity.

[Brief description of drawings]

FIG. 1 is a schematic view 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 view showing a spinning state by the device. 6 ... Spindle, 6a ... Spindle inlet, 13 ...
Guide member support, 17 ... Nozzle, 22 ... Guide member, 23 ... Nozzle block, 31 ... Bush, S ...
… Fiber bundle, D …… Outside diameter of spindle inlet, d …… Inside diameter of spindle inlet, δ …… Distance from spindle inlet to end face on the inlet side of bush, r …… Inner diameter of nozzle block

Claims (1)

[Scope of utility model registration request] 1. A guide member is installed in a nozzle block that causes a swirling air flow to act on a fiber bundle exiting a draft device, with its tip facing the inlet of a rotating or stationary spindle, and an annular bush is provided downstream of the nozzle block. Installed, the outer diameter D of the tip of the spindle, its inner diameter d, the distance δ from the spindle inlet to the inlet side end face of the bush (plus is assumed when the spindle inlet is upstream from the inlet side end face of the bush)
And a spinning device whose relationship with the inner diameter r of the nozzle block is defined by the following equations. r / D = 1 to 3 D / d = 1.5 to 3 −2 <δ <2 (mm)