JPH0673618A - Spinning apparatus - Google Patents

Abstract

PURPOSE:To facilitate the separation and inversion of the rear end of a fiber and to eliminate the generation of yarn unevenness in an apparatus for producing a spun yarn by twisting a drafted untwisted fiber tow with a gyrating air flow. CONSTITUTION:This spinning apparatus is composed of a rotating or stationary hollow spindle 6 having conical head part, a guide member 5 protruding its tip end toward the inlet port 6a and a nozzle block 2 having a nozzle 3 to eject gyrating air flow against a fiber tow 6a supplied to the surrounding of the guide member. The angle (theta) of a bush 9 covering the head part of the spindle is made to be 0.3-1 times the inclination angle (alpha) of the nozzle relative to the moving direction of the fiber tow and the angle (beta) of the conical head of the spindle is made to be slightly larger than the angle theta.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for producing a spun yarn by twisting an untwisted fiber bundle drafted by a drafting device by applying a whirling air current, and particularly to a long yarn typified by a wool fiber. The present invention relates to a spinning device most suitable for spinning fiber yarn.

[0002]

2. Description of the Related Art The applicant of the present invention comprises a nozzle block having a nozzle for causing a swirling air flow to act on a fiber bundle exiting a draft device, a hollow spindle, and a guide member projecting with its tip toward its inlet. An apparatus for manufacturing a spun yarn by twisting a non-twisted short fiber bundle by an airflow has been proposed and filed separately.

[0003]

The angle of the spindle inlet head of the above-mentioned conventional spinning device and the angle of the bush covering it are as small as tens of degrees, and when spinning a long fiber yarn, It is difficult to reverse from the spindle inlet at the rear end to the downstream side. Therefore, incomplete inversion of the rear end of the fiber occurs, and the fiber is often wound in a state where the central portion of the fiber is separated from the fiber bundle, and thus the manufactured yarn is apt to be wound with a bundle (a binding yarn) or a loop.

The present invention is an apparatus for producing a spun yarn by twisting a drafted non-twisted fiber bundle by applying a swirling air current to the yarn, whereby separation and inversion of the rear end of the fiber is easily performed, and uneven yarn is produced. The purpose is to lose.

[0005]

In order to achieve the above object, a spinning device of the present invention comprises a hollow spindle which has a conical head portion and rotates or stands still, and a guide member which projects its tip toward its inlet. And a nozzle block having a nozzle for ejecting a swirling air flow to the fiber bundles supplied around it, and the angle of the bush covering the spindle head is 0.3 to 1 times the inclination angle of the nozzle with respect to the fiber bundle advancing direction. age,
The angle of the spindle conical head is slightly larger than that.

[0006]

[Operation] In the spinning device configured as described above, the fiber bundle exiting the draft device is drawn into the device by the action of the air flow ejected from the nozzle, and the front ends of all the fibers of the fiber bundle are From around the guide member, the fiber bundle being formed into the yarn is drawn and guided into the spindle.
In addition, the rearward side of the fiber is reversed from the spindle inlet and separated into each fiber by the action of sufficient traveling force of the air flow ejected from the nozzle. The separated fibers at the rear end are exposed to a swirling airflow ejected from a nozzle, and as the yarn travels, the fibers are spirally wound around a fiber bundle that is being formed into a yarn and become a spun yarn of a real twist.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a spinning device S of the present invention will be described with reference to FIGS.

This spinning device S generally has a draft device D.
The nozzle block 2 having the nozzle 3 disposed inside the casing 1 following the above, the guide member support body 4 having the guide member 5 disposed therein, and the inlet side head portion were inserted into the casing 1. It comprises a rotary spindle 6 and a fiber bundle introducing body 7 mounted on the inlet side of the nozzle block 2.

The spindle 6 includes a belt, a contact roller,
It is rotationally driven by an appropriate drive means such as an air turbine. A fiber bundle passage 8 is formed at the center thereof,
The outer diameter of the inlet 6a is sufficiently small, and the portion following the inlet 6a is a conical portion 6b whose outer diameter increases at a large angle toward the downstream side.

A hollow chamber 10 is formed in a portion covering the head portion of the spindle 6 between the bush 9 fixed in the casing 1 and the outer shape of the head portion of the spindle 6. The downstream side portion following the hollow chamber 10 is an annular hollow chamber 11 formed in the lower portion of the casing 1, and an air escape hole 12 is formed in the subsequent tangential direction.

The outlet portion of the nozzle block 2 on the upstream side of the bush 9 has a narrow internal space, and the outlet portion thereof, as shown in FIG. The groove-shaped wall portions 2b are formed alternately. Further, the nozzle block 2 is formed with four air jet nozzles 3 which are directed slightly downstream from the inlet 6a of the spindle 6 and which are oriented linearly with respect to the arc-shaped wall portion 2a of the outlet portion thereof. . The direction of the nozzle 3 is set to be the same as the rotation direction of the spindle 6.

A groove wall 2b at the outlet of the nozzle block 2
Serves as a passage for reversing from the spindle inlet of the fiber rear end described later, and although the swirl component force of the air ejected from the nozzle 3 is secured as before, the fiber rear end reversal is achieved even in the case of long fibers. It can be done easily.

The relationship between the inlet side head of the spindle 6 and the bush 9 covering it is as follows. That is, the area of the portion b, which is obtained by subtracting the cross-sectional area of the spindle 6 at the position corresponding to the outlet of the nozzle block 2 from the area of the circle connecting the innermost portions of the groove-shaped wall portions 2b, is the circle passing through the arc-shaped wall portion 2a. 1 to 8 times the area of a portion obtained by subtracting the cross-sectional area of the spindle 6 at the position corresponding to the outlet of the nozzle block 2 from the area of, and the angle θ of the bush 9 is 0 of the inclination angle α of the nozzle 3 with respect to the fiber bundle traveling direction. 3 to 1 times, the sectional area of the minimum clearance c between the head of the spindle 6 and the bush 9 is 1.5 of the area of the portion a.
˜3.5 times, the length d from the opening position of the nozzle 3 to the minimum gap portion c is 0.25 to 0.5 of the average fiber length of the supplied fiber bundle.
Double, the length e of the bush 9 forming the minimum clearance c is 5
It is 15 mm, and the cross-sectional area of any position of the hollow chamber 10 that covers the conical portion 6b is 1 to 24 times the area of the portion a. For example, the diameter of a circle passing through the arc-shaped wall portion 2a and each groove-shaped wall portion 2b
The diameters of the circles connecting the innermost portions of the nozzles are 6 mm and 8 mm, the inclination angle α of the nozzle 3 is 60 °, and the outer diameter of the spindle inlet is 2.
When it is 8 mm, the angle β of the spindle conical portion 6b is 64 °, the angle θ of the bush 9 is 60 °, and the inner diameter of the bush 9 and the outer diameter of the spindle in the minimum gap portion c are 31 mm and 30 mm, respectively.

Thus, if the angle θ of the bush 9 covering the spindle head is 0.3 to 1 times the inclination angle α of the nozzle 3 and the angle β of the spindle conical head is slightly larger than that, the nozzle The swirling component force of the air jetted from No. 3 can be secured as in the conventional case, and a traveling component force sufficient for reversing from the spindle inlet of the fiber rear end can be obtained. for that reason,
Conventionally, the winding of loop-shaped fibers, which has been generated during the spinning of long-fiber yarns, is reduced, and the amount of orderly wound fibers is increased. Therefore, the distance from the nip point of the front roller to the spindle inlet 6a can be shortened, and the UI representing the thickness unevenness, the number of portions thinner than the average, the number of thick portions, and the IPI value representing the number of neps are improved. The appearance is the same as the ring thread.

Inside the upper portion of the casing 1, a hollow air reservoir 13 is formed between the casing 1 and the nozzle block 2.
The nozzle 3 communicates with the air reservoir 13, and the air reservoir 13
A hose (not shown) is connected to the via a hole 14.

The compressed air supplied from the hose, after flowing into the air reservoir 13, is ejected from the nozzle 3 into the internal space of the outlet portion of the nozzle block 2 and produces a high-speed swirling airflow in the vicinity of the spindle inlet 6a. After the air flow swirls in the inner space of the nozzle block 2 outlet and the hollow chamber 10,
While gently swirling in the hollow chamber 11, it diffuses outward, is guided to the escape hole 12 and is discharged. At the same time, this air flow is transferred from the nip point of the front roller to the casing 1.
To generate a suction air flow that flows into the hollow part of the.

As shown in FIG. 4, the guide member support 4 has a cross-sectional shape that divides the internal space of the nozzle block 2 into two and forms fiber bundle passages 15 on both sides. Shaped guide member 5 is fixed.

The guide member 5 projects from the center of the guide member support 4 and has its tip free, and faces the inlet 6a of the spindle 6.

The fiber bundle introducing member 7 includes a guide member supporting member 4
Two fiber bundle introducing passages 16 communicating with the respective fiber bundle passages 15 are formed. In each of the fiber bundle introducing passages 16, a sub-nozzle 17 having a circular cross section or a slit shape facing the downstream side is laterally or vertically arranged. There are multiple openings or all around. Further, the fiber bundle introducing body 7 is provided with an air reservoir 18 communicating with the sub nozzle 17 and an air introducing hole (not shown). Then, the compressed air supplied from the external hose connected to it is flown into the air reservoir 18, is jetted from the sub-nozzle 17 to each fiber bundle introducing passage 16, and is advanced to the spindle inlet 6a. Invert from the inlet 6a to help separate.

Two fiber bundles fed from the draft device are separately supplied to the two fiber bundle introduction passages 16, but the number of the fiber bundle introduction passages 16 may be one. In that case, the shape of the guide member support 4 is slightly changed accordingly.

The spindle 6 assists in twisting the yarn, and can be manufactured depending on the yarn even if it does not rotate. Therefore, the spindle 6 does not necessarily have to rotate.

In the spinning device constructed as described above, the fiber bundle exiting from the draft device is drawn into the device mainly by the action of the air flow ejected from the ejection nozzle 3. Then, the front ends of all the fibers of the fiber bundle are guided from the periphery of the guide member 5 into the spinning spindle 6 which is pulled by the fiber bundle being formed into a yarn. The rear end side of the fiber is assisted by the air flow ejected from the sub-nozzle 17 by the advancing component force of the air flow ejected from the nozzle 3, and mainly passes through the space of the annular wall portion 2a and the spindle inlet 6a.
And is separated from each fiber. The separated fibers at the rear end are exposed to the swirling airflow ejected from the nozzle 3,
As the yarn runs, it is spirally wound around the fiber bundle that is being formed into a yarn, and becomes a spun yarn in the form of a real twist.

[0023]

Since the present invention is configured as described above, it has the following effects.

That is, the angle of the bush covering the spindle head is set to 0.3 of the angle of inclination of the nozzle with respect to the fiber bundle advancing direction.
Since the spindle conical head angle is slightly larger than that, the inversion of the fiber rear end from the spindle inlet is smooth, there is no rod winding or loop, and the amount of wound fiber is extremely high. It is possible to manufacture yarns that are comparable to ring yarns in terms of many appearances and tenacity properties. Further, the distance from the nip point of the front roller to the spindle entrance can be shortened.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a positional relationship between a spinning device and a draft device of the present invention.

FIG. 2 is a sectional view of the spinning device of the present invention.

FIG. 3 is a diagram of a nozzle block as a component when viewed from the inlet side.

4 is a sectional view taken along line AA in FIG.

FIG. 5 is a cross-sectional view near the spindle head.

[Explanation of symbols]

 2 Nozzle block 3 Nozzle 5 Guide member 6 Spindle 6a Spindle inlet 6b Spindle conical part α Bushing angle β Nozzle inclination angle θ Spindle conical head angle

Claims (1)

[Claims] 1. A hollow spindle which has a conical head and rotates or stands still, a guide member which projects its tip toward its inlet, and a nozzle which ejects a swirling air flow to a fiber bundle supplied around it. A spinning device comprising a nozzle block and a bush covering the spindle head, the angle of the nozzle being 0.3 to 1 times the inclination angle of the nozzle with respect to the fiber bundle advancing direction, and the angle of the spindle conical head being slightly larger than that.