JP3114652B2 - Air Spindle Spindle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air spinning machine for producing a spun yarn by twisting a non-twisted short fiber bundle drafted by a drafting device by applying a swirling airflow thereto.

[0002]

2. Description of the Related Art The present applicant has previously proposed an air spinning machine for producing a real twist spun yarn using a spinning device shown in FIG.
A separate application has already been filed.

The spinning device has a nozzle member having a nozzle for applying a swirling airflow to a fiber bundle exiting a draft device, and has a tip portion located at a point where the swirling airflow acts from the nozzle member, and serves as a yarn passage. Consisting of a spindle member having a hollow portion and a guide member projecting toward the tip thereof toward the entrance thereof, the fiber bundle exiting the draft device is driven by a suction flow generated by the action of an air flow ejected from a nozzle. The front ends of all the fibers of the fiber bundle are drawn into the spindle from around the guide member by the fiber bundle being formed into a yarn. Further, the rear end of the fiber is inverted from the spindle inlet by the suction flow and the swirling airflow from the nozzle, and is separated into fibers. The separated fibers at the rear end are exposed to the swirling airflow from the nozzle, and are introduced into the spindle while being wound around the fiber bundle being formed into the yarn as the yarn travels, thereby forming a true twist. This results in the formation of a spun yarn.

[0004]

In the above-described conventional spinning apparatus, the hole diameter of the yarn passage provided in the spindle member is an important dimension that affects the quality of the yarn to be spun, and is small and long. In addition, during spinning, there is a problem in that lint or fiber clumps or the like contained in the sliver are clogged in the yarn passage, causing yarn breakage and deteriorating the spinnability. For this reason, research has been advanced to find a spindle that is less likely to be clogged with leaf residue and fiber lump.

The present invention solves the above-mentioned problems of the conventional spinning machine. During spinning, so-called trash, which is contained in a sliver, such as leaf lump and agglomeration of fibers, clogs the yarn passage. It is an object of the present invention to provide a spindle that does not cause yarn breakage and deteriorate spinnability.

[0006]

In order to solve the above-mentioned problems, in the present invention, a nozzle member for applying a swirling airflow to a fiber bundle exiting a draft device, and a point where the swirling airflow from the nozzle member acts. A spindle member positioned at the tip end of the air spindle;
A spindle that constitutes a member and penetrates the center
The tip of the yarn passage has a hole diameter of φ1.0 mm to 1.5 mm
The gist of the present invention is that the length of the narrow passage is 2 mm to 3 mm . Therefore, when forming the spun yarn at the tip of the spindle member by the swirling airflow, it is possible to suppress the vibration of the spun yarn and obtain stable yarn properties. In addition,
Because the length of the passage was 2-3 mm,
Reducing yarn breakage during spinning

Further, a thick passage is provided downstream of the narrow passage.
The connecting passage between the narrow passage and the thick passage is a tapered passage.
Therefore, when piecing with a piecing device,
Take the yarn end wound on the package so that
Can be threaded. Further, the hole diameter of the large passage is smaller than the hole diameter of the narrow passage.
Since the length is 2 to 4 times, even if the length dimension of the spindle member is set freely, it is possible to always obtain stable yarn properties of the spun yarn without increasing yarn breakage due to trash clogging. Was.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is an enlarged view showing the tip shape of a spindle according to the present invention,
(A) is a spindle tip shape according to the present invention,
(B) is a conventional spindle tip shape. FIG. 2 is a sectional view of a spinning device to which the present invention is applied. FIG. 3 is an overall front view of a spinning machine to which the present invention is applied. 4 and 5
Shows the results of the spinning experiment using each spindle.

First, a spinning machine to which the present invention is applied will be described. As shown in FIG. 3, the spinning machine has a spinning unit U
After the sliver L is sent to the drafting device D and formed into a spun yarn Y by the spinning unit Sp, the spun yarn Y passes through a nip roller Rn, a slab catcher Z, and the like. W is wound up. P is a piecing device that performs piecing, and is configured to run below the inside of the spinning machine along the longitudinal direction of the spinning machine.

As shown in FIG. 2, the spinning device to which the present invention is applied is composed of a draft device D and a spinning unit Sp. The drafting device D is a so-called 4-wire drafting device including a back roller Rb, a third roller Rt, a second roller Rs having an apron, and a front roller Rf, each of which includes a pair of rollers. The drafting device D is a device for extending a sliver L supplied through a sliver guide T to a predetermined fineness, and performs drafting by gradually increasing the rotation speed of each roller.

The sliver L drafted to a predetermined thickness by passing through the draft device D is supplied to a spinning unit Sp composed of a nozzle member N and a spindle member S, and is formed into a spun yarn Y. The spindle member S includes a stationary or rotating spindle 1. The nozzle member N has a plurality of air injection holes (nozzles) n perforated in a tangential direction. Spindle 1
The spun yarn Y is formed by a swirling airflow generated by injecting toward the front end of the spun yarn Y.

The fiber bundle that has exited the front roller Rf of the draft device is drawn into the casing from the hole 6 of the support member 5 of the guide member 4 by the suction flow generated by the action of the air flow ejected from the air ejection hole n. The front ends of all the fibers of the fiber bundle are pulled from around the guide member 4 by the fiber bundle being formed into the yarn, and the yarn passage 2 in the spindle 1 is drawn.
Is led to. The rear end side of the fiber is inverted from the spindle tip 3 by the suction flow and the swirling airflow from the air injection hole n, and is separated into fibers.

The separated fibers are exposed to the swirling airflow from the air injection holes n, and are introduced into the spindle while being spirally wound around the fiber bundle being formed into the yarn as the yarn travels. This is a mechanism for forming a real twist-like spun yarn. Guide member 4 at this time
Is a so-called pseudo-core, which prevents the propagation of twist in the yarn forming process or temporarily substitutes for the central fiber bundle. It functions to prevent the formation and to form the yarn with only the wound fiber.

As described above, the separated fiber at the tip of the spindle is drawn into the thread passage at the center of the spindle while being swirled (while ballooning) by the swirling airflow, thereby forming a spun yarn. Therefore, the tip hole diameter of the spindle 1 has an optimum dimension with respect to the diameter of the yarn to be spun. In an experiment in which the present invention was confirmed, the diameter was 1.1 mm for the spun yarns Ne20 to Ne40. . Further, when spinning a yarn thicker than Ne20, a slightly larger hole diameter is optimal, and when spinning a yarn thinner than Ne40, a slightly smaller hole diameter is optimal. Therefore, the spinning range Ne5 to Ne to which the present invention is applied.
It seems that φ1.0 to φ1.5 mm is an appropriate size for 60.

FIG. 5 shows the yarn properties of the spun yarn when the spindle hole diameter is changed. The machine condition at this time is 380m / mi of yarn speed.
At n, the air pressure injected from the nozzle was 4 kg / cm ² . As is clear from the results, the yarn properties such as yarn strength and elongation are improved as the pore diameter is smaller. However, although not shown in the figure, the smaller the hole diameter is, the more thread breakage due to trash clogging increases, and the spinnability of a spinning machine having a large number of spinning units is greatly deteriorated. It is necessary to make it as large as possible and to reduce the size so as to improve the yarn physical properties, so that each spun yarn type has a certain appropriate hole diameter.

As described above, the hole diameter at the tip of the spindle 1 is an important dimension that greatly affects the yarn properties and spinnability, and cannot be easily changed. Therefore, as shown in FIG. 1- (a), in the present invention, the spinning performance was improved by shortening the length L1 of the narrow passage 2a which is the yarn passage at the tip of the spindle. In the conventional yarn passage shape shown in FIG. 1- (b), the diameter of the narrow passage 2a is φ1.1 mm, its length L2 is 10 mm, and continues to the thick passage 2b having a diameter of 3.5 mm. A spinning experiment was performed by sequentially reducing the length of the narrow passage 2a. When L1 = 2 mm, the yarn physical properties were equivalent to the yarn physical properties obtained by the conventional spindle, and the yarn breakage was reduced. The remarkable effect was seen.

The connecting passage between the narrow passage and the thick passage is one on one side.
A 20 ° tapered passage 2c is formed on both sides of 0 °.
The passage is formed in a tapered shape in order to thread a yarn end wound on a package in a direction reverse to the yarn passage during piecing by a piecing device. A taper angle of ３０30 ° seems appropriate. Since the hole diameter of the thick passage is φ3.5 mm, the hole diameter which is 2 to 4 times the hole diameter of 1.0 to 1.5 mm of the narrow passage is an appropriate size.

FIG. 4 shows the results of the spinning experiment. The machine conditions at this time were as follows: the yarn speed was 350 m / min, the air pressure jetted from the nozzle was 4 kg / cm ² , and the ester cotton blend 50/50 N
e37 total draft 163, main draft 45
And the result when the cotton yarn Ne20 was spun by the total draft 106 and the main draft 40.

As can be seen from FIG. 4, the yarn strength, the elongation and the degree of uniformity representing the degree of yarn unevenness are almost the same without any significant difference, but there is a clear difference in the number of yarn breaks. Was done.
That is, in the case of ester cotton blend Ne37, 41.7 times is 3
0.4 times, and 28.5 times 2 for cotton yarn Ne20.
It decreased to 0.3 times. The number of thread breaks is the number of thread breaks per hour for one spinning machine with 72 spindles. Upon close observation, it was found that this decrease in the number of thread breaks was due to a decrease in trash clogging at the spindle inlet. Trash is a foreign matter contained in the sliver, such as leaf residue and fiber agglomeration. This is probably because the trash that had been clogged was easily discharged to the rear end of the spindle as it was.

The elongation of the spun yarn is 5% or more, and the distance from the delivery roller Rn to the tip of the spindle is about 300.
mm, up to a yarn elongation of about 15 mm in this area would be acceptable. At a spinning speed of 350 m / min, this 15 mm elongation corresponds to 0.0026 seconds. In other words, it is only necessary that the trash that is likely to be clogged in the narrow passage within 0.0026 seconds passes through the narrow passage. Assuming that the speed at which the trash passes through the narrow passage is reduced to about half of the spinning speed, the length of the narrow passage becomes 1
When the length is 0 mm, 0.0034 seconds are required, but when the length of the narrow passage is 2 mm, 0.0007 seconds is sufficient. That is, when the length of the narrow passage is 10 mm, the thread breaks, and when the length is 2 mm, the thread does not break. As is apparent from this calculation, when the length L1 of the narrow passage is 2 mm, the yarn is stretched until the yarn is broken even if the trash that is about to be clogged passes through the narrow passage while being decelerated. Instead, it is considered that it was discharged to the rear end of the spindle.

[0021]

As described above, according to the present invention,
Of the thread passages in the spindle, the length of the narrow passage located at the tip was shortened and immediately connected to the thick passage,
The yarn properties affected by the shape of the spindle tip are the same, and when the supplied sliver is drafted and introduced into the spindle portion, foreign matter such as leaf residue or fiber clumps contained in the sliver is obtained. However, the number of clogging of the narrow passage, which is the entrance of the spindle, was greatly reduced, and the breakage of the yarn during spinning was reduced, which had a great effect on improving the spinning performance.

[Brief description of the drawings]

FIG. 1 is an enlarged view showing a tip shape of a spindle according to the present invention, wherein (a) is a spindle tip shape according to the present invention, and (b) is a conventional spindle tip shape.

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

FIG. 3 is an overall front view of a spinning machine to which the present invention is applied.

FIG. 4 is a table showing the results of a spinning experiment using each spindle.

FIG. 5 is a table showing the results of a spinning experiment using each spindle.

[Description of Signs] 1 spindle 2 yarn passage 2a narrow passage 2b thick passage Sp spinning unit N nozzle member S spindle member D draft device P piecing device L sliver Y spun yarn

Claims (3)

(57) [Claims] 1. An air spinning machine having a spinning section comprising a nozzle member for applying a swirling airflow to a fiber bundle exiting a draft device, and a spindle member having a hollow portion serving as a yarn passage.
And a spindle constituting the spindle member
The tip of the yarn passage penetrating through the center is φ1.
With a hole diameter of 0 mm to 1.5 mm and a length of 2 mm to 3 mm
A spindle of an air spinning machine characterized by a narrow passage . 2. A thick passage is provided downstream of the narrow passage.
The spindle according to claim 1, wherein a connecting passage between the road and the thick passage is a tapered passage . 3. A method according to claim 1, wherein the diameter of the large passage is smaller than the diameter of the narrow passage by 2 to 4.
The spindle of the air spinning machine according to claim 2 , wherein the spindle is doubled .