JPH07197330A - Pneumatic spinning equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an air spinning device capable of producing a bound spun yarn having a high constituent ratio of wound fibers and excellent yarn strength. [Structure] A plurality of wall members parallel to the traveling direction of the fiber bundle are provided in the fiber bundle introduction path on the introduction side of the spinning nozzle. Also,
A flat fiber bundle introduction path was formed on the introduction side of the spinning nozzle, and a plurality of wall members parallel to the traveling direction of the fiber bundle were arranged side by side in the fiber bundle introduction path. In addition, a plurality of wall members parallel to the fiber bundle advancing direction were erected from above and below in the fiber bundle introducing path.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a pneumatic spinning nozzle.

[0002]

2. Description of the Related Art Conventionally, in an air spinning device, a sliver supplied from a can is drafted by a draft device composed of three or more draft roller pairs, and then the sliver is arranged in series downstream of the draft device. The false spinning is performed by an air spinning nozzle including a first nozzle (introduction nozzle) and a second nozzle (twisting nozzle) that generate swirling airflows in opposite directions.

That is, when the sliver drafted by the drafting device and flattened and spread is sent out from the front roller, most of the fibers constituting the sliver are run up to the vicinity of the front roller. However, the fiber tips mainly on both sides of the sliver become free and unconstrained due to the vibration caused by the ballooning in the direction opposite to the false twist by the first nozzle.

[0004] When the above-mentioned unconstrained fibers are wound around the core fiber bundle as a core fiber bundle in the direction opposite to the false twist due to the action of the swirling air current in the first nozzle. In addition, as a result of being further wound around the core fiber bundle in the process of untwisting the false twist passing through the second nozzle, there is almost no twist and there are wound fibers around the parallel core fiber bundle. A twisted spun yarn is formed.

In order to increase the yarn strength of the bundled spun yarn in such an air spinning device, it is essential to increase the number of wound fibers and keep the amount constant, but as described above, the sliver is constructed. Since most of the fibers to be wound are immediately bundled by false twisting of the second nozzle, there is a problem that it is difficult to secure the tenacity of the yarn because the amount of the unwrapped fibers to be wound fibers is limited.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present invention provides an air spinning device capable of producing a bundled spun yarn having a high constituent ratio of wound fibers and excellent yarn strength. The purpose is to do.

[0007]

A plurality of wall members parallel to the traveling direction of the fiber bundle are provided in the fiber bundle introduction path on the introduction side of the spinning nozzle. Further, a flat fiber bundle introduction path was formed on the introduction side of the spinning nozzle, and a plurality of wall members parallel to the advancing direction of the fiber bundle were arranged side by side in the fiber bundle introduction path. In addition, a plurality of wall members parallel to the fiber bundle advancing direction were erected from above and below in the fiber bundle introducing path.

[0008]

The sliver, which is drafted by the drafting device and flattened and spread, is sent out from the front roller, and is sucked into the fiber bundle introduction path by suction generated by the compressed air jet in the spinning nozzle, and the fiber bundle is introduced. In the passage, a plurality of wall members are branched and introduced into the spinning nozzle in a parallel state. At this time, the fibers in the central portion of the sliver are bundled by false twisting of the false twisting device that has been upstreamed and transmitted to form a converged fiber bundle, but the other fibers act as a swirling air flow in the spinning nozzle. Is wrapped around a bundle of bundles of fibers to form wrapped fibers. When the false twist is unwound on the downstream side of the false twist device, a large amount of wound fibers are present around the substantially parallel core fiber bundle, so that a bundled spun yarn in a twisted state is obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment will be described with reference to the drawings.

1 to 3, in the pneumatic spinning device 1 of the embodiment of the present invention, a fiber bundle introducing passage 4 is provided at an introducing side of a nozzle 3 arranged downstream of a front roller pair 2 of a draft device.
Is provided. The fiber bundle introduction path 4 has a flat elongated hole shape whose cross-sectional shape is parallel to the nip line N of the front roller pair 2, and inside thereof, wall members 5 and 6 parallel to the fiber bundle advancing direction are arranged from above and below. It stands up alternately.

The front end edges 8 of the wall members 5 and 6 are inclined with an appropriate receding angle in order to facilitate the introduction of the fiber bundle,
The rear edge 9 has a reverse inclination parallel to the front edge 8. Further, the neck portion 10 between the fiber bundle introducing passage 4 and the spinning nozzle 3 has a flat funnel shape.

An air injection hole 11 is opened in the inner peripheral wall of the spinning nozzle 3 in the tangential direction of the inner peripheral wall so that a swirling airflow can be generated in the spinning nozzle 3. The air injection hole 11 is obliquely provided with an appropriate inclination angle with respect to the central axis of the spinning nozzle 3 and facilitates the generation of suction airflow on the introduction side of the first nozzle N1. A balloon controller 12 is provided on the delivery side of the spinning nozzle 3.

A false twisting device 13 is provided on the downstream side of the spinning nozzle 3. In the illustrated example, a false twisting device 13 is provided, which comprises a pair of nip belts 14 and 15 that are in contact with each other in the traveling direction and are capable of nipping a yarn at the contact portion. Reference numeral 16 is a delivery roller in pressure contact with the nip roller 17.

Next, the operation will be described based on the embodiments.

When the sliver S drafted by the draft device and spread flatly is sent out from the front roller pair 2, the sliver S is introduced into the fiber bundle introduction path 4 by the suction airflow generated by the compressed air injection in the spinning nozzle 3. Wall members 5 and 5, which are sucked and are erected from above and below in the fiber bundle introduction path 4.
6 and 6 are branched in the length direction and introduced into the spinning nozzle 3 in a substantially parallel state. At this time, among the fibers forming the sliver S, a part of the fibers f2 near the center in the width direction is used.
Is bundled by false twisting of the false twisting device 13 that goes up to the rear end edge 9 of the wall members 5 and 6 to form a focused fiber bundle f2. However, most of the other fibers f1 of the sliver S are Is guided by the wall members 5, 5, 6, 6 and leaves the nip point N of the front roller pair 2 while passing through the fiber bundle introduction path 4.
The free fiber f0 is in an unrestrained state.

Then, the free fiber f0 is wound around the core fiber bundle f2 by the action of the swirling air current by the compressed air jet in the spinning nozzle 3 to be wound around the core fiber bundle f2. To form. At this time, on the surface of the fiber bundle, the fiber ends of the wound fiber f1 are separated from the core fiber bundle f2 to form many fluffs. Further, in the false twisting device 13 on the downstream side of the spinning nozzle, the false fluff is suppressed by imparting false twisting and rubbing action when the fiber bundle is fed while being nipped by the pair of nip belts 14 and 15.
Further, the false twist of the core fiber bundle f2 is untwisted on the downstream side of the false twisting device 13, and a large amount of wound fibers are present around the almost untwisted and parallel core fiber bundle, so that the false twist is performed. The bundled spun yarn Y in the state is delivered from the delivery roller 16.

In the spinning process, the false twisting by the false twisting device 13 is prevented from going up by the wall members 5 and 6, and the false twist is not transmitted to the fiber bundle introducing passage 4, so that the fiber bundle is introduced. In the path 4, the fiber bundles are not converged and remain in a substantially parallel state, and a constant distance is provided between the nip point N of the front roller pair 2 and the fiber bundle convergence point on the downstream side of the fiber bundle introduction path 4. The distance is secured. Therefore, many free fibers f0 are easily generated in the fiber bundle introduction path 4,
The free fibers f0 are reliably fed into the spinning nozzle 3 in a parallel state by being guided by the wall members 5 and 6 through the fiber bundle introduction path 4 in which a suction airflow is generated inside.
A large amount of wound fiber f1 is formed.

The wall members 5 and 6 are alternately arranged vertically in the fiber bundle introducing path 4, and the front end edges 8 of the wall members 5 and 6 are inclined so that the wall members 5 and 6 are flatter than the front roller pair 2. The sliver S delivered in the widened state is sucked into the fiber bundle introducing passage 4 and easily and surely branched, and in addition, the rear end edges 9 of the wall members 5 and 6 are inclined backward. As a result, the free fiber f0 is locked, and it is difficult for the free fiber to rotate. Therefore, the upstream transmission of false twist can be reliably prevented.

The cross section of the fiber bundle introduction path 4 is formed into a flat long hole parallel to the nip line N of the front roller pair 2, so that suction by compressed air injection in the spinning nozzle 3 is performed by the front roller pair 2. Since it extends over a relatively wide range in the width direction of the sliver, the sliver S that has been flattened and spread out is reliably sucked into the spinning nozzle 3, the amount of wrapping fibers produced is stable, and the obtained bound spun yarn is obtained. Y has an excellent yarn strength.

[0020]

The pneumatic spinning device of the present invention is, as described above,
Since it is configured, it has the following effects.

In the fiber bundle introduction path on the introduction side of the spinning nozzle,
Since a plurality of wall members parallel to the traveling direction of the fiber bundle are provided,
The upstream transmission of false twist into the fiber bundle introduction path is prevented, and
Since a fixed distance is secured from the front roller pair to the fiber bundle converging point, a large amount of free fibers are generated in the fiber bundle introduction path, the composition ratio of the wound fibers is high, and the binding spinning is excellent in yarn strength. Yarn can be obtained.

Since the fiber bundle introducing path is formed flat and a plurality of wall members parallel to the fiber bundle advancing direction are arranged side by side in the fiber bundle introducing path, it is flattened from the front roller pair and delivered. The sliver can be easily and surely introduced, and the amount of free fibers to be wound can be stabilized.

Since a plurality of wall members parallel to the fiber bundle advancing direction are erected from above and below in the fiber bundle introducing passage, a flat sliver can be branched easily and surely into the fiber bundle introducing passage. It is possible to prevent the false twist transmission and increase the production amount of the free fiber which becomes the wound fiber.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing an air spinning device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of a main part showing an air spinning device according to an embodiment of the present invention.

FIG. 3 is a front view showing the pneumatic spinning device according to the embodiment of the present invention.

[Explanation of symbols]

 1 Air Spinning Nozzle 2 Front Roller Pair 3 Spinning Nozzle 4 Fiber Bundle Introduction Path 5,6 Wall Member S Sliver f0 Free Fiber f1 Wound Fiber f2 Focused Fiber Bundle (Core Fiber Bundle) Y Spun Yarn

Claims (3)

[Claims] 1. An air spinning device, comprising a plurality of wall members parallel to a traveling direction of a fiber bundle, which are provided in a fiber bundle introducing path on an introduction side of a spinning nozzle. 2. An air characterized in that a flat fiber bundle introduction path is formed on the introduction side of the spinning nozzle, and a plurality of wall members parallel to the traveling direction of the fiber bundle are arranged side by side in the fiber bundle introduction path. Spinning equipment. 3. A flat fiber bundle introduction path is formed on the introduction side of the spinning nozzle, and a plurality of wall members parallel to the traveling direction of the fiber bundle are erected from above and below in the fiber bundle introduction path. Pneumatic spinning device characterized by.