JPH0554565U - Spinning equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the rotatability of a yarn and increase the yarn strength in a pneumatic spinning device. [Structure] A nozzle block 2 having an opening nozzle 3 for causing a swirling air flow to act on a fiber bundle exiting a draft device, and an inlet 6a
Twisting nozzle 11 that ejects a swirling airflow into the nearby fiber bundle passage 9
And a guide member 5 protruding toward the spindle inlet 6a.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a device for producing a spun yarn by twisting a non-twisted short fiber bundle drafted by a drafting device by applying a swirling air flow to twist the bundle.

[0002]

[Prior Art]

 The present applicant has previously proposed a pneumatic spinning device for producing a real twist spun yarn, and has already applied for it (Japanese Patent Application No. 2-34874). The spinning device is the one shown in FIG. 1 and the opening position of the twisting nozzle 11 into the passage of the spindle 6 (as shown in FIG. 1, it is not opened near the spindle inlet 6a but is opened near the outlet). Although there is a difference in the detailed configuration, it basically does not change, so that the description will be given with reference to FIG.

This device has a nozzle block 2 having an opening nozzle 3 that causes a swirling air flow to act on the fiber bundle exiting the draft device, and a twisting nozzle 11 that ejects the swirling air flow into a fiber bundle passage 9 near the outlet. It is composed of a non-rotating spindle 6, a guide member support 4, and a guide member 5 attached to the guide member support 4 and protruding toward the spindle inlet 6a.

[0004]

[Problems to be solved by the device]

 In the above-described conventional spinning device, the twist nozzle 11 has an outlet at the opening position into the spindle passage 9 and is separated from the spindle inlet 6a, which is the yarn forming position. It was not possible to say that the strength of the thread was still sufficient.

This invention aims at improving the rotatability of the yarn and increasing the yarn strength in such a pneumatic spinning device.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, a spinning device of the present invention has a nozzle block having an opening nozzle that causes a swirling air flow to act on a fiber bundle exiting a draft device, and a fiber near an inlet. It is composed of a non-rotating spindle having a twisting nozzle that ejects a swirling airflow into the bundle passage, and a guide member that projects toward the spindle inlet with its tip end.

[0007]

[Work]

 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 fiber opening nozzle, and the front ends of all the fibers of the fiber bundle are guided by the guide. From around the member, the fiber bundles being formed into yarns are drawn and guided into the spindle. Further, the rear end side of the fiber is inverted from the spindle inlet and separated into each fiber. The separated fibers at the rear end are exposed to the swirling airflow ejected from the opening nozzle, and the rotation of the yarn by the swirling airflow from the twisting nozzle causes the fiber bundle that is being formed into the yarn as the yarn travels. The spun yarn is spirally wound around it 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 a nozzle block having an opening nozzle 3 arranged at an inlet of a casing 1. 2, a guide member support 4 fixed to the inlet side thereof and having a guide member 5, and a non-rotating spindle 6 inserted into the casing 1 on the inlet side.

A portion of the spindle 6 that follows the inlet 6a is a conical portion 6b whose outer diameter increases toward the downstream side. At the center of the spindle 6, the inner diameter is small on the inlet 6a side and large on the downstream side. The through hole 7 is formed. The through hole 7 and the center of the casing 1 are both located on the same straight line that coincides with the running path of the fiber bundle. A cylindrical body 8 is fitted and inserted in a large diameter portion of the through hole 7, a fiber bundle passage 9 is formed in the center thereof, and a narrow diameter portion 8a having a large width is provided in the periphery. An air reservoir 10 is secured between the spindle 6 and the tubular body small-diameter portion 8a, and the inlet side of the tubular body 8 communicates with the air reservoir 10 and is directed slightly downstream or not, and Four twisting nozzles 11 are formed which are tangential to the fiber bundle passage 9. An air hose (not shown) is connected to the air reservoir 10 through a hole 12 formed on the downstream side of the spindle 6. By increasing the width of the small diameter portion 8a as described above, the opening position of the twisting nozzle 11 can be brought as close as possible to the spindle inlet 6a.

The compressed air supplied from the air hose flows into the air reservoir 10 and then is ejected from the twist nozzle 11 into the fiber bundle passage 9 to generate a high-speed swirling airflow. At the same time, this air flow generates a suction air flow that flows into the passage 7 from the spindle inlet 6a, and this suction air flow facilitates the suction of the seed yarn. Further, the whirling airflow imparts false twist to the yarn in the fiber bundle passage 9, promotes winding of the fiber rear end described later, improves the tightness of the yarn, and increases the strength. Moreover, since the twisting nozzle 11 exists near the spindle inlet 6a, the yarn rotating efficiency is good. As described above, instead of using the swirling airflow from the twisting nozzle 11, the spindle 6 is rotated to rotate the yarn, but there is a limit in mechanically rotating the spindle 6. The swirling airflow can rotate the yarn at a speed as high as several times as high as the mechanical rotation, and thus can cope with a considerably high speed spinning.

A portion of the nozzle block 2 that covers the spindle 6 is a hollow chamber 12 having a shape that follows the outer shape of the spindle 6, and serves as a guide passage for the fiber bundle. On the downstream side, a large hollow chamber 13 is formed by the casing 1, and subsequently an air escape hole 14 is formed tangentially. An air suction pipe (not shown) is connected to the air escape hole 14.

A compressed air supply body 15 is fitted on the outside of the nozzle block 2, and a hollow air reservoir 16 is formed between the compressed air supply body 15 and the nozzle block 2. The nozzle block 2 is formed with four opening nozzles 3 that communicate with the air reservoir 16 and face downstream slightly away from the spindle inlet 6a and that are tangential to the hollow chamber 12. An air hose (not shown) is connected to the reservoir 16 through a hole 17. The direction of the opening nozzle 3 is set to be the same as the direction of the twist nozzle 11.

The compressed air supplied from the air hose flows into the air reservoir 16 and then is ejected from the fiber opening nozzle 3 into the hollow chamber 12 to generate a high-speed swirling airflow in the vicinity of the spindle inlet 6a. The air flow swirls inside the hollow chamber 12, diffuses into the hollow chamber 13, is guided to the escape hole 14 and is 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 4 has a cap shape having a hole 18 for receiving the fiber bundle at a position off the center. In the central portion of the guide member support body 4, a fine hole that matches the center line of the passage 10 of the spindle 6 is bored, and the pin-shaped guide member 5 is inserted into the fine hole.

The guide member 5 projects from the pores of the guide member support 4 and has a free end, which faces the inlet 6 a of the spindle 6. The guide member 5 has a diameter smaller than the passage diameter of the inlet 6a of the spindle 6, and has a tip formed with a smooth curve. Further, in the figure, the tip is shown at a position slightly entering the inside of the passage 7 from the inlet 6a of the spindle 6, and this state is the most preferable, and the produced yarn also has an appearance that is closest to the ring yarn. Presents. 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 close 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 fiber bundle exiting from the front roller of the draft device is acted by the air flow ejected from the opening nozzle 3 from the hole 18 of the guide member supporting body 4 to the casing 1 The front ends of all the fibers of the fiber bundle are drawn into the spindle 6 from the periphery of the guide member 5 by the fiber bundle being formed into the yarn. Further, the rear end side of the fibers is separated into the respective fibers when being inverted from the spindle inlet 6a. The separated fibers at the rear end are exposed to the swirling airflow ejected from the opening nozzle 3, and further, the yarn is rotated by the swirling airflow from the twisting nozzle 11, and the fiber bundle that is being formed into the yarn as the yarn travels. The yarn is spirally wrapped around and becomes a twisted spun yarn. The guide member 5 blocks the propagation of twist in the yarn forming process, or acts as a so-called pseudo core, which temporarily substitutes for the central fiber bundle, and appears prominently in the conventional air-bonded spun yarn. It functions to prevent the formation of a non-twisted core fiber bundle and to form a yarn from virtually only the wound fiber.

[0018]

[Effect of the device]

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

That is, it is possible to manufacture a yarn that has an extremely large amount of wound fibers and is comparable to the ring yarn in terms of appearance and tenacity, and of course, since the twist nozzle is provided near the spindle inlet, the yarn rotation efficiency is improved. It is possible to increase the thread tightening and the thread strength, and it is possible to achieve higher speed spinning. Further, it becomes easy to suck the seed yarn into the spindle passage.

[Brief description of drawings]

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

[Explanation of reference numerals] 1 casing 2 nozzle block 3 opening nozzle 4 guide member support 5 guide member 6 spindle 6a spindle inlet 11 twist nozzle

Claims (1)

[Scope of utility model registration request] 1. A nozzle block having an opening nozzle that causes a swirling air flow to act on a fiber bundle exiting a draft device, a non-rotating spindle having a twisting nozzle that ejects a swirling air flow into a fiber bundle passage near an inlet, and a spindle. A spinning device including a guide member that projects toward the inlet with its tip end.