JPH06240520A - Spinning device - Google Patents

Abstract

PURPOSE:To form spun yarn free from a major defect such as a nep by disposing a hollow friction member at the exit of the hollow spindle of the spinning device for twisting a non-twisted staple fiber bundle with a revolving air flow. CONSTITUTION:In the spinning device utilizing a revolving air flow, a nontwisted staple fiber bundle discharged from a draft device D is drawn with a revolving air flow blown out from a nozzle in the spinning device S. The front ends of staple fibers forming the fiber bundle are guided into a rotating hollow spindle 6, and the rear ends are simultaneously separated from each other by the axially directional action of the revolving air flow and spirally wound on the periphery of the fiber bundle forming yarn Y to form the spun yarn Y similar to a really twisted yarn. The whole periphery of the yarn Y is twisted with a hollow friction member 19 disposed at the exit of the spindle 6, and leaf residues, seed residues, neps, etc., are simultaneously removed. The yarn is subsequently spun out from a delivery roller Rd through a yarn guide 21.

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 short fiber bundle drafted by a drafting device by causing a swirling air flow to twist the bundle.

[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 air flow was previously proposed and filed.

[0003]

Among the yarns spun by the above spinning device, there are leaf scum, seed scum in raw cotton,
Etc. are partially mixed, which is the main cause, and also due to the hook fiber with a bent tip, a thick and short part that can be cut with a slab catcher, that is, a serious defect such as nep is relatively Are occurring frequently.

According to the present invention, in a spinning device for producing a spun yarn by twisting a supplied fiber with a swirling airflow, it is possible to spun a yarn having almost no serious defects such as nep that is cut by a slab catcher. The purpose is to

[0005]

In order to achieve the above object, a spinning device of the present invention is arranged next to a draft device, and a hollow friction member is fixed to an outlet of a yarn of a rotating hollow member. Is.

[0006]

[Operation] In the spinning device configured as described above, the fiber bundle exiting the draft device is formed into yarn, and when leaving the hollow member, the yarn is rubbed around the entire circumference while being rotated by the friction member. , Leaf dregs, seed dregs, etc. are repelled from the thread, the hook fibers at the tip are loosened, and nep etc. are removed.

[0007]

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

This spinning device S is provided between the front roller Rf and the delivery roller Rd of the draft device D, and is generally arranged inside the casing 1 following the draft device D and has a nozzle block 3 having a nozzle 3. 2 and
The guide member support 4 is provided at the inlet portion and has the guide member 5, the rotary spindle 6 is inserted into the casing 1 on the inlet side, and the friction member 19 is fixed to the outlet of the rotary spindle 6. .

The draft device D employs, for example, a front roller Rf, a second roller R2 having an apron, a third roller R3 and a back roller Rb.

A fiber bundle passage 7 is formed through the center of the spindle 6, the outer diameter of the inlet 6a is sufficiently small, and the portion following the inlet 6a has a conical portion whose outer diameter increases toward the downstream side. 6b.

A portion of the nozzle block 2 which covers the vicinity of the spindle inlet 6a is a hollow chamber 8 having a small diameter along the outer shape, and the upstream side thereof is slightly larger than the tip diameter of the spindle 6 by the nozzle block 2. It has a cylindrical shape with a diameter. An annular hollow chamber 9 formed in the lower casing 1a and a tangential air escape hole 10 following the hollow chamber 9 are formed in a portion following the hollow chamber 8.

Inside the upper casing 1b, a hollow air reservoir 11 is formed between it and the nozzle block 2. The nozzle block 2 communicates with the air reservoir 11, faces downstream slightly away from the inlet 6a of the spindle 6, and has a hollow chamber 8
Four air injection nozzles 3 are formed which are tangential to the air reservoir 11, and a hose (not shown) is connected to the air reservoir 11 through a hole 12. The direction of the nozzle 3 is set to be the same as the rotation direction of the spindle 6.

The compressed air supplied from the hose, after flowing into the air reservoir 11, is ejected from the nozzle 3 into the hollow chamber 8,
A high-speed swirling airflow is generated in the vicinity of the spindle inlet 6a. This air flow swirls inside the hollow chamber 8 and then diffuses outward while gently swirling inside the hollow chamber 9 to release the escape hole 10
It is guided in the direction and discharged. At the same time, this air flow
A suction air flow is generated which flows from the nip point of the front roller into the hollow portion of the casing 1.

The guide member support 4 is in the shape of a cap having a fiber bundle introduction hole 13 in the upper part off the center,
A pin-shaped guide member 5 is fixed to the center of the upper part.

The guide member 5 projects from the center of the upper portion of the guide member support 4 and has its free end exposed to the entrance 6a of the spindle 6.

The spindle drive unit is the bearing casing 14
Is supported by an air bearing inside and driven by an air turbine.

In the air bearing, a cylindrical bush 17 having an air ejection hole 17b is fitted into the bearing casing 14 following the air reservoir 17a, and the bearing casing 14 also has a compressed air supply hole 14c communicating with the air reservoir 17a. It is provided. Reference numeral 18 is a cap of the bearing casing 14.

In this air bearing, the compressed air supply hole 1
When compressed air is supplied from a hose (not shown) connected to 4c, the compressed air is discharged through the air reservoir 17a, the air ejection hole 17b and a slight gap between the spindle 6 and the bush 17, 6 is in a non-contact state with the bush 17.

In the air turbine, a cylindrical bush 16 having a compressed air supply hole 16a and an air discharge hole 16b opening tangentially in the bearing casing 14 is fitted, and the bearing casing 14 also has a compressed air supply hole 16a or air. A compressed air supply hole 14a or an air discharge hole 14b communicating with the discharge hole 16b is provided, while the compressed air supply hole 1 is provided.
A plurality of semicircular recesses 6c for receiving the jetted air flow are formed on the outer peripheral surface of the spindle 6 corresponding to the opening of 6a.

In this air turbine, when compressed air is supplied from a hose (not shown) connected to the compressed air supply hole 14a, the compressed air is supplied to the compressed air supply hole 16a.
The spindle 6 is rotated by passing through a and hitting the concave portion 6c of the spindle 6. The air flow that rotates the spindle 6 is discharged through the air discharge holes 16b and 14b.

The friction member 19 is made of a sintered metal having good durability and a particle size of about 120 μm, has a thread passage 20 in the center, and is fixed to the outlet of the spindle 6 with an adhesive or the like. There is. The yarn passage 20 has the same inner diameter as the fiber bundle passage 7 on the upstream side, and has a taper shape that opens at an angle of about 30 ° toward the outlet on the downstream side. The friction member 19 only needs to have a large friction coefficient of the thread passage 20,
In addition to the above examples, an O-ring, one having mechanically formed irregularities, one to which a substance having irregularities is attached, or the like can be adopted.

A yarn guide 21 is provided between the friction member 19 and the delivery roller Rd. The installation position is, for example, a distance L from the outlet end of the friction member 19.
1 is 10 _mm , and the distance L2 from the line connecting the center of the friction member 19 and the nip point of the delivery roller Rd is 10 _mm . In addition, from the yarn guide 21 to the delivery roller R
The distance L3 to the nip point of d is 100 _mm .

As described above, when the friction member 19 is attached to the outlet of the spindle 6 and the yarn Y being spun is spun while being forcibly pressed against the yarn passage 20 of the friction member 19 by the yarn guide 21, the yarn Y is rotated while being completely rotated. Rubbed around the leaves and leaves,
The seed residue and the like are repelled from the thread, the tip hook fibers are loosened, and the nep and the like caused by them are removed. At that time, since the yarn Y is rotating, it is not cut.

In the spinning device constructed as described above, the fiber bundle that has exited the draft device is drawn into the device by the action of the air flow ejected from the nozzle 3, and the front ends of all the fibers in the fiber bundle are guided. A spindle 6 which is drawn around the member 5 by a fiber bundle being formed into a yarn and rotates.
Be guided inside. Further, on the rear end side of the fiber, the axial component force of the air flow ejected from the nozzle 3 acts and the spindle inlet 6
It is inverted from a and separated into each fiber. The separated fibers at the rear end are exposed to the swirling airflow ejected from the nozzle 3, and are spirally wound around the fiber bundle that is being formed in the yarn as the yarn travels to form a spun yarn Y in a real twist shape. Become.
At that time, the yarn Y is rubbed around the entire circumference by the friction member 19 while being rotated, leaf dust, seed dregs and the like are repelled from the yarn, and the tip hook fiber is loosened, which causes nep. Etc. are removed.

Finally, regarding the spinning device using the sintered metal for the friction member 19, the spinning device using the O-ring, and the conventional spinning device in which the friction member 19 is not attached at all, the nozzle 3
Supply air pressure of 4 kg / cm ² , the rotation speed of the spindle 6 is 50,000 rpm, the spinning speed is 250 m / min, and the target number is 4
The properties of the yarn when spun as 0 Ne were examined.
The results are shown in Table 1.

[0026]

[Table 1]

The results show that the spinning device of the present invention slightly increases the fluffing as compared with the conventional spinning device having no friction member, but the yarn strength is almost the same and the uniformity (U%). It can be seen that is slightly improved and the number of neps is greatly reduced. Also, looking at the distribution of thickness,
The spinning device according to the present invention comprises A4, B4, C4, D4, C3, D3 and middle 4 which are referred to as a class mat measure 6.
The serious defects of A3, B3, C2, and D2 referred to as “cutting with a slab catcher” are greatly reduced. In particular, it is 0 in the case of a sintered metal. The class mat is a table for locating the relationship between the length and the degree of the thickness of the portion where the thickness of the yarn is different from the average value, and Table 2 is a part thereof.

[0028]

[Table 2]

[0029]

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

That is, since the amount of wound fibers is extremely large, and the appearance and strength characteristics of the ring yarn are comparable to those of the ring yarn, the friction member is fixed at the outlet of the rotary hollow member, It is possible to eliminate serious defects such as nep that is cut by a slab catcher without adding extra power. Therefore, the operating rate of the device is significantly improved.

[Brief description of drawings]

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

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

[Explanation of symbols]

 2 Nozzle block 3 Nozzle 5 Guide member 6 Spindle 6a Spindle inlet 19 Friction member 21 Yarn guide

Claims (1)

[Claims] 1. A spinning device in which a hollow friction member is fixed to the yarn outlet of a rotating hollow member which is arranged next to the draft device.