JPH0572975U - Spinning equipment - Google Patents

Abstract

(57) [Summary] [Purpose] When spinning long-fiber yarns such as wool, it is possible to produce yarns that are no different from ring spun yarns without neps or loops. [Structure] A rotating or non-rotating hollow spindle 4, a guide member 5 projecting its tip toward an inlet 4a thereof, a fiber bundle that has exited a draft device is drawn into the interior, and a spindle inlet is provided.
It is composed of a nozzle block 8 having a nozzle 7 for applying an air flow that inverts the fibers from 4a, and a nozzle block 12 having a nozzle 11 for applying a swirling air flow to the inversion fiber.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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 to the spun yarn, and more particularly to a spinning device for long fibers.

[0002]

[Prior Art]

 The applicant has previously proposed a pneumatic spinning device suitable for producing a real twist spun yarn mainly for short fibers such as cotton, and has already filed a separate application (Japanese Patent Application No. 3-29904 etc.).

The device has a rotating or non-rotating hollow spindle and a guide member projecting its tip toward the entrance thereof, and a swirling airflow is ejected toward the spindle entrance to the fiber bundle exiting the draft device. It is a spinning device that twists.

[0004]

[Problems to be solved by the device]

 The above-described conventional spinning device is excellent for short fibers because it has an extremely large amount of wound fiber and can produce a yarn that is comparable in appearance and tenacity to a ring yarn. When spinning the long-fiber yarn, the rotation delay occurs due to the air resistance at the rear end of the fiber that rotates by reversing from the spindle inlet, and the fiber is hardened near the outer periphery of the spindle inlet. There will be many neps and loops.

An object of the present invention is to provide a spinning device capable of producing a yarn similar to a ring-spun yarn having no nep or loop even when spinning a long fiber yarn such as wool.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a spinning device of the present invention is configured such that a rotating or non-rotating hollow spindle, a guide member having a tip directed toward an inlet thereof, and a fiber bundle exiting a draft device are drawn into the inside. It is composed of a nozzle block having a nozzle that applies an air flow that inverts fibers from the spindle inlet, and a nozzle block that has a nozzle that applies a swirling air flow to the inversion fibers.

[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 suction reversing nozzle, and the front ends of all the fibers in the fiber bundle are guided. 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 reversed from the spindle inlet by the air flow ejected from the suction reversing nozzle and separated into each fiber. The separated fibers at the rear end are exposed to the swirling airflow ejected from the twisting nozzle and rotate in a state where the separated state is maintained, and as the yarn runs, the fibers are formed around the fiber bundle that is being formed in the yarn. It is wound in a spiral shape and becomes a spun yarn with a real twist.

[0008]

【Example】

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

This spinning device is arranged next to the draft device, and is supported by a spindle 4 accommodated in a spindle casing 2 supported by a supporting plate 1 fixed to a frame and a tip of the spindle casing 2. A cylindrical guide member support 6 for supporting a guide member 5 housed in the nozzle casing 3 in order from the inlet side, a nozzle block 8 having a fiber suction reversing nozzle 7, and a twisting auxiliary nozzle. It is composed of a nozzle block 10 having 9 and a nozzle block 12 having a main twisting nozzle 11.

The spindle 4 is rotatably supported by a bearing 13 in the spindle casing 2, and is rotationally driven by a drive belt 14 that runs across each weight. The rotation speed is about 30,000 rotations / minute. A fiber bundle passage 15 is formed through the center of the spindle 4, the outer diameter of the inlet 4a is sufficiently small, and the portion following the inlet 4a is a conical portion 4b whose outer diameter increases toward the downstream side. . Further, four blades 4c are formed so as to project along the axial direction on the outermost periphery of the most downstream thereof. The blades 4c serve to supplementarily rotate the fibers inverted from the spindle inlet 4a. It should be noted that this spindle 4 does not necessarily have to rotate because it serves to assist the twisting of the yarn and can be manufactured depending on the yarn even if it does not rotate.

The guide member 5 is located at the center of the fiber bundle passage 16 of the guide member support 6 and has a free end, which faces the inlet 4 a of the spindle 4. The distance from the nip point of the front roller of the draft device to the tip of the guide member 5 is set to the average fiber length of the fiber bundle or a little shorter than that. For example, if the average fiber length of the fiber bundle is 80 mm, the distance from the nip point of the front roller to the tip of the guide member 5 is 60 to 80 mm. Therefore, a guide pipe 27 for guiding the fiber bundle from the nip point of the front roller to the inlet of the nozzle casing 3 is provided at the inlet of the nozzle casing 3.

Inside the nozzle casing 3, a hollow air reservoir 17 is formed between the nozzle casing 8 and the fiber suction reversing nozzle block 8. The nozzle casing 3 communicates with the air reservoir 17 and has an axial center. Four air jet nozzles 7 are formed which face each other. An air hose (not shown) is connected to the air reservoir 17 through a hole 18.

The compressed air supplied from the hose flows into the air reservoir 17, and then is ejected from the nozzle 7 into the annular gap 19 formed between the nozzle casing 3 and the guide member support 6. This air flow generates a suction air flow that flows into the hollow portion of the casing 3 from the nip point of the front roller, reverses the trailing end side of the fibers from the spindle inlet 4a, and separates the fibers. At this time, the air pressure ejected from the nozzle 7 is about 3 to 4 kg / cm ² .

Similarly to the case of the fiber suction / inversion nozzle block 8, air reservoirs 20 and 22 are formed in the twisting auxiliary nozzle block 10 and the twisting main nozzle block 12, respectively, and holes 21 and 23 are provided therein. Has been. However, the nozzles 9 and 11 face downstream and are tangential to the hollow chamber 24 surrounding the spindle 4, and these directions are set to be the same as the rotation direction of the spindle 6. A wide annular hollow chamber 25 is provided downstream of the hollow chamber 24, and a tangential air escape hole 26 is formed subsequently to the hollow chamber 25. Then, the airflow ejected from the nozzles 9 and 11 into the hollow chamber 24 swirls inside the hollow chamber 24, then swirls the hollow chamber 25 gently but spreads outward and is guided toward the escape hole 26. He is discharged. By the swirling airflow formed in the hollow chamber 24, the fibers inverted from the spindle inlet 4a are entirely rotated. Air pressure ejected from the nozzle 9, 11 in this case, each 0.5 Kg / cm ^2, is about 3-4 kg / cm ^2, therefore, the rotating air flow is responsible for ejecting mainly nozzle 11 or al ..

As described above, the air pressure ejected from the nozzle 9 is very weak, and this assists the rotation of the fibers reversed from the spindle inlet 4a, and in some cases, as shown in FIG. The nozzle block 10 having the twisting auxiliary nozzle 9 may be omitted.

In the spinning device configured as described above, the fiber bundle drafted by the draft device is drawn into the nozzle casing 3 from the guide pipe 26 by the action of the air flow ejected from the nozzle 7, and The front ends of all the fibers of the bundle are drawn from the circumference of the guide member 5 into the fiber bundle which is being formed into yarns and into the spindle. Further, the rear end side of the fiber is reversed from the spindle inlet 4a by the air flow ejected from the nozzle 7 and separated into each fiber. The separated fibers at the rear end are exposed to the nozzle 11, and in some cases, the swirling airflow ejected from the nozzle 9 to rotate while maintaining the separated state, and are formed into a yarn as the yarn travels. It is wound into a spiral around the fiber bundle that is being formed into a real twist spun yarn. 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 remarkably present in the conventional pneumatic bound spun yarn. It functions to prevent the formation of untwisted core fiber bundles and to form the yarn from only the wound fibers.

[0017]

[Effect of the device]

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

That is, that is, fibers that are reversed from the spindle inlet can be sufficiently rotated in a separated state, and as with cotton yarn spinning, there is no nep or loop, appearance and strength characteristics are comparable to ring yarns. It is possible to produce yarns without.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of another embodiment of the spinning device of the present invention.

[Explanation of symbols]

 4 Spindle 4a Spindle inlet 5 Guide member 9 Auxiliary nozzle for twisting 10 Auxiliary nozzle block for twisting 11 Main nozzle for twisting 12 Main nozzle block for twisting

Claims (1)

[Scope of utility model registration request] 1. A rotating or non-rotating hollow spindle, a guide member projecting with its tip toward the inlet, a fiber bundle that has exited the draft device is drawn into the interior, and an airflow that causes the fibers to be inverted from the spindle inlet is applied. A spinning device comprising a nozzle block having nozzles, and a nozzle block having nozzles for causing a swirling air flow to act on a reversed fiber thereof.