JPH0514168U - Spinning equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the drop rate in pneumatic spinning equipment. A nozzle block 2 having a nozzle 3 for causing a swirling air flow to act on a fiber bundle exiting a draft device, a rotating or stationary spindle 6 having a fiber bundle passage 8, and an inlet side fixed to an inlet portion of the nozzle block 2. The guide member support body 4 is provided with staggered weirs 4a on the outlet side, and the guide member 5 provided on the weir 4a on the outlet side and projecting its tip toward the spindle inlet 6a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus 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]

[Prior Art]

 The applicant has previously proposed a pneumatic spinning device for producing a real twist spun yarn as shown in FIG. 2, and has already filed a separate application (Japanese Patent Application No. 3-29904).

The device has a nozzle block 16 having a nozzle 17 for causing a swirling air flow to act on a fiber bundle exiting a draft device, a fiber bundle passage 19, and a spindle 18 which is rotated by a driving device such as a rotating roller 20. (It does not need to be rotated), the guide member support 21 fixed in the nozzle block 16, and the guide member 22 attached to the guide member support 21 and protruding toward the spindle inlet 18a. It will be

[0004]

[Problems to be solved by the device]

 The conventional spinning device described above has a problem in that a large amount of cotton dust is discharged from the air escape hole 23 together with the air flow. The cotton drop rate, that is, the ratio of cotton fly to the supplied fiber is as high as 8 to 15%, which is uneconomical.

The present invention aims to reduce the cotton drop rate in such a pneumatic spinning device.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a spinning device of the present invention comprises a nozzle block having a nozzle that causes a swirling air flow to act on a fiber bundle that has exited a draft device, a spindle that has a fiber bundle passage, and a spindle that is stationary or stationary. It consists of a guide member support that is fixed to the inlet of the block and has staggered weirs on the inlet side and the outlet side, and a guide member that is installed on the weir on the outlet side and projects its tip toward the spindle inlet. It is a thing.

[0007]

[Work]

 In the spinning device configured as described above, the amount of sucked air drawn into the casing by the operation of the air flow ejected from the nozzle is relatively large, but the fiber bundle exiting the front roller is guided by the two weirs. The fibers are drawn into the casing in such a manner that they are evenly gathered around the member, and the front ends of all the fibers are uniformly drawn from around the guide member into the fiber bundle being formed into yarn and guided into the spindle. At that time, the floating fibers are apt to be drawn into the fiber bundle by the fibers gathering uniformly around the guide member. Also, the rear end side of the fiber is separated into each fiber as it is turned over from the spindle inlet. The separated fibers at the rear end are exposed to the swirling airflow ejected from the nozzle, and as the yarn travels, they are spirally wound around the fiber bundles that are being formed into yarn to form a spun yarn.

[0008]

【Example】

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

This spinning device is arranged next to a draft part including a back roller, a middle roller having an apron, and a front roller, and is provided inside a casing 1 with a nozzle block 2 having a nozzle 3. A guide member support 4 fixed inside the guide member 5 and a rotating spindle 6 inserted into the casing 1 on the inlet side.

The spindle 6 is circumscribed by three rollers 7 (one of which is on the front side of FIG. 1 and not shown) and is circumscribed. One of them is a drive roller, which can obtain a much higher speed of 50,000 to 200,000 rpm than that of the one in which the spindle 6 is directly rotated by a belt (30,000 rpm).

A fiber bundle passage 8 is formed through the center of the spindle 6, and the center of the passage 8 and the respective centers of the casing 1 are located on the same straight line that coincides with the traveling path of the fiber bundle. . The outer diameter of the inlet 6a of the spindle 6 is sufficiently small, and the portion following the inlet 6a is a conical portion 6b whose outer diameter increases toward the downstream side.

The portion of the casing 1 that covers the spindle conical portion 6b is a tapered portion 1a that opens in a trumpet shape along the outer diameter of the spindle conical portion 6b, and is formed between the spindle conical portion 6b and the annular portion. A space 9 is formed.

A nozzle block 2 is fitted on the inlet side of the casing 1, and a fiber bundle passage 10 is formed inside the nozzle block 2.

Inside the casing 1, a hollow air reservoir 11 is formed between the casing 1 and the nozzle block 2. The nozzle block 2 is formed with four air jet nozzles 3 which are in communication with the air reservoir 11 and face downstream slightly away from the spindle inlet 6a and which are tangential to the fiber bundle passage 10. An air hose 13 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.

On the downstream side of the annular space 9 of the casing 1, an annular hollow chamber 14 and a subsequent tangential air escape hole 15 are formed. An air suction pipe is connected to the air escape hole 15.

The compressed air supplied from the hose 13 flows into the air reservoir 11 and then is ejected from the nozzle 3 into the annular space 9 of the casing 1 to generate a high-speed swirling airflow in the vicinity of the spindle inlet 6a. This air flow, after swirling inside the annular space 9, is guided from the hollow chamber 14 to the escape hole 15 and discharged. At the same time, this air flow creates a suction air flow which flows into the hollow part of the casing 1 from the nip point of the front roller.

The guide member support body 4 has a cylindrical shape, and a weir 4 a having a shape in which a part of a disk is cut out is provided in a staggered manner with respect to the center on the inlet side and the outlet side thereof. . The base end of the guide member 5 is attached to the weir 4a on the outlet side. By attaching the guide member 5 to the weir 4a in this way, the amount of air sucked into the device can be increased and the sucked fiber bundle can be collected in the central portion, so that the strength of the spun yarn is increased. It is possible to reduce the cotton drop rate.

The guide member 5 has its tip free and faces the center of the spindle inlet 6a, and its diameter is smaller than the passage diameter of the spindle inlet 6a.

The tip of the guide member 5 is shown in the figure at a position slightly entering the inside of the passage 8 from the spindle inlet 6a, and this state is the most preferable, and the yarn to be produced is also the most ring yarn. It has a similar appearance. However, depending on the conditions, it is possible to take a position away from the end face of the inlet 6a, and it is possible to manufacture a yarn having an appearance similar to that of a ring yarn. These yarns are comparable in strength properties to ring yarns.

In the spinning device configured as described above, the amount of sucked air drawn into the casing 1 by the operation of the air flow ejected from the nozzle 3 is relatively large, but the air is discharged from the front roller of the draft device. The fiber bundle is drawn into the casing 1 so as to be uniformly gathered around the guide member 5 by the two weirs 4a, and the front ends of all the fibers are being formed into yarns evenly around the guide member 5. The fiber bundle is pulled and guided into the spindle. At that time, the floating fibers are apt to be drawn into the fiber bundle by the fibers gathering uniformly around the guide member 5. Further, the rear end side of the fiber is inverted from the spindle inlet 6a and separated into each fiber. The front ends of all the fibers of the fiber bundle that are drawn in by the suction air are drawn from the periphery of the guide member 5 to the fiber bundle that is being formed into a yarn and guided into the spindle. Further, the rear end side of the fiber is inverted from the spindle inlet 6a and separated into each fiber. The separated fibers at the rear end are exposed to the swirling airflow ejected from the nozzle 3, and as the yarn travels, the fibers are spirally wound around the fiber bundles that are forming into a real twisted spun yarn. Become. At this time, the guide member 5 functions as a so-called pseudo core that prevents the propagation of twist in the yarn forming process or temporarily substitutes for the central fiber bundle, and is remarkable in the conventional air-bonded spun yarn. It prevents the formation of the untwisted core fiber bundle appearing in Fig. 3 and effectively forms the yarn only with the wound fiber.

Although the example of rotating the spindle 6 has been described above, the spindle 6 serves to help twist the yarn, and since the spindle 6 can be manufactured depending on the yarn without rotation, the spindle 6 is It does not necessarily have to rotate.

[0023]

[Effect of the device]

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

That is, the amount of wound fiber is extremely large, and it is possible to manufacture a yarn whose appearance and tenacity property are comparable to those of the ring yarn. In addition, since the guide member is attached to the weir, the yarn strength is improved. In addition to being able to raise it even further, it can significantly reduce the rate of cotton drop.

[Brief description of drawings]

FIG. 1 is a sectional view of a spinning device of the present invention.

FIG. 2 is a sectional view of a spinning device as a prior art example.

[Explanation of symbols]

 1 Casing 2 Nozzle Block 3 Nozzle 4 Guide Member Support 4a Guide Member Support Weir 5 Guide Member 6 Spindle 6a Spindle Inlet

Claims (1)

[Scope of utility model registration request] 1. A nozzle block having a nozzle for causing a swirling air flow to act on a fiber bundle exiting a draft device, a rotating or stationary spindle having a fiber bundle passage, and an inlet side and an outlet side fixed to an inlet portion of the nozzle block. A spinning device comprising a guide member support body having a staggered weir on its inner side, and a guide member provided on the weir on the outlet side thereof and projecting its tip toward the spindle inlet.