JPH0522564U - Spinning equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To further reduce the cotton drop rate in pneumatic spinning devices. 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 fiber bundle passage (18) fixed inside the inlet side and having an inner diameter gradually decreasing toward the downstream side, and an outlet perpendicular to the fiber bundle passage (18). An Oris mesh 4 having a side end surface 4b, and a guide member support 5 fixed inside the Oris mesh 4;
It consists of a rotating or stationary hollow spindle 7 and a guide member 6 protruding toward the spindle inlet 7a and attached to the guide member supporting body 5. The inner diameter of the fiber bundle passage abruptly expands at the boundary of the outlet of the Orissis 4. To do.

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-twisted spun yarn having a structure shown in FIG. 2 with little fiber loss, and has already filed a separate application (Japanese Patent Application No. 3-5469).

The device has a nozzle block 2 having a nozzle 3 that causes a swirling air flow to act on a fiber bundle that has exited the draft device, a fiber bundle passage 9, and a spindle that is rotated by a drive device such as a rotating roller 8. 7 (not required to rotate), a guide member support fixed in the nozzle block 2 having a fiber bundle passage 18 formed with a taper portion 5a whose inner diameter is reduced toward the downstream side and an enlarged diameter portion 5b following the taper portion 5a. It is composed of a body 5 and a guide member 6 which is attached to the guide member support body 5 so as to project toward the spindle inlet 7a with its tip end.

[0004]

[Problems to be solved by the device]

 In the above-described conventional spinning device, although the amount of fly waste discharged from the air escape hole 14 along with the air flow is reduced, the cotton drop rate, that is, the proportion of fly waste to the supplied fiber is still 3 to 4%. It is uneconomical because there is also.

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

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the spinning device of the present invention has a nozzle block having a nozzle that causes a swirling air flow to act on a fiber bundle that has exited a draft device, and an inner diameter of the nozzle block that is fixed inside the inlet side and gradually decreases toward the downstream side. Fiber bundle passage and an outlet end face at right angles to the fiber bundle passage, a guide member support member fixed therein, a hollow or rotating spindle, and a guide member support member protruding toward the spindle inlet end It is composed of a guide member attached to the fiber bundle, and the inner diameter of the fiber bundle passage rapidly increases at the exit of the Orissis.

[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 nozzle. At that time, when the sucked air flow exits the outlet of Oris, it winds up to the upstream side and rides on the air flow, and the suspended fibers are pulled back to the center of the fiber bundle. Then, the front ends of all the fibers of the fiber bundle are drawn from the periphery of the guide member to the fiber bundle being formed into a yarn and guided into the spindle. Further, the rear end side of the fiber is reversed 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 nozzle, and as the yarn travels, they are spirally wrapped around the fiber bundle that is being formed into yarn and become spun yarn with a real twist. ..

[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 consisting of a back roller, a middle roller having an apron, and a front roller, and a nozzle block 2 having a nozzle 3 arranged inside a casing 1. A guide member support 5 having an orifice 4 fixed inside the inlet side, a guide member 6 fixed inside the orifice 4, and a spindle 7 inserted into the casing 1 on the inlet side.

The spindle 7 is circumscribed and surrounded by three rollers 8 (one of which is on the front side of FIG. 1 and not shown), one of which is a drive roller. Is A fiber bundle passage 9 is formed through the center of the spindle 7, and the center of the passage 9 and each center 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 spindle inlet 7a is sufficiently small, and the portion following the inlet 7a is a conical portion 7b whose outer diameter increases toward the downstream side.

A portion of the casing 1 that covers the spindle 7 has a small-diameter cylindrical hollow chamber 11 in the vicinity of the spindle inlet 7a by means of a bush 10. The portion following the hollow chamber 10 is a conical hollow that opens at a large angle. Room 12

In front of the small-diameter hollow chamber 10, the inner wall 2a of the nozzle block 2 forms a cylindrical shape having a diameter slightly larger than the tip diameter of the spindle 7, and the cylindrical portion serves as a guide passage for the fiber bundle. It will be. In front of the conical hollow chamber 12, an annular hollow chamber 13 and a tangential air escape hole 14 following it are formed. An air suction pipe is connected to the air escape hole 14.

Inside the casing 1, a hollow air reservoir 15 is formed between the casing 1 and the nozzle block 2. The nozzle block 2 is formed with four air injection nozzles 3 which communicate with the air reservoir 15 and face downstream slightly away from the spindle inlet 7a and which are tangential to the hollow chamber 11. An air hose 17 is connected to the reservoir 15 through a hole 16. The direction of the nozzle 3 is set to be the same as the rotation direction of the spindle 7.

The compressed air supplied from the hose 17 flows into the air reservoir 15 and then is ejected from the nozzle 3 into the hollow chamber 11 to generate a high-speed swirling airflow in the vicinity of the spindle inlet 7a. After swirling in the hollow chamber 11, this air flow diffuses outward while swirling in the conical hollow chamber 12, is guided to the escape hole 13 and is discharged. At the same time, this air flow produces a suction air flow which flows into the hollow part of the casing 1 from the nip point of the front roller.

The orifice 4 is formed with a fiber bundle passage 17 having a tapered inner wall 4a whose inner diameter gradually decreases from the inlet. The inner diameter of the outlet of the tapered inner wall 4a is smaller than the inner diameter of the cylindrical portion 2a of the nozzle block 2, and the fiber bundle passage abruptly expands at the outlet-side end surface 4b of the guide member support 4. The fiber bundle passing through this portion is restricted in rotation, and immediately after passing there, the fiber bundle is diffused and the open end state is promoted. Further, the suctioned airflow exiting the fiber bundle passage 18 is rolled up toward the end face 4b as shown by the arrow, whereby the floating fibers are pulled back and the fiber loss is reduced.

The guide member support 5 has a columnar shape with a conical portion protruding at one end, and a hole matching the center of the passage 9 of the spindle 7 is formed in the longitudinal direction of the guide member support 5. A pin-shaped guide member 6 is inserted therein. The guide member 6 has its tip free and faces the spindle inlet 7a. Further, the guide member 6 has a diameter smaller than the passage diameter of the spindle inlet 7a, and has a tip formed with a smooth curve. In the figure, the tip of the guide member 6 is shown in a position where the tip of the guide member 6 enters the inside of the passage 9 from the spindle inlet 7a. 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 the position away from the end face of the inlet 7a, 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 fiber bundle exiting the draft device is restricted in rotation by the tapered inner wall 4 a of the orifice 4 due to the action of the jet air flow from the nozzle 3. It is drawn in, diffuses immediately after passing there, and promotes an open-ended state.On the other hand, the air flow sucked from the inlet winds up to the upstream side and rides on the air flow, and the floating fibers reach the center of the fiber bundle. Be pulled back. Then, the front ends of all the fibers of the fiber bundle are drawn from the periphery of the guide member 6 to the fiber bundle being formed into a yarn and guided into the spindle. The rear end side of the fiber is reversed from the spindle inlet 7a 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 wrapped around the fiber bundles that are forming into a real twisted spun yarn. Become. At this time, the guide member 6 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 air-bonded spun yarn. It functions to prevent the formation of untwisted core fiber bundles and to form the yarn from the wound fibers.

Lastly, Table 1 shows the cotton drop rate when the spun yarn is manufactured by variously changing the air pressure ejected from the nozzle 3 by the spinning device of the present invention and the spinning device shown in the conventional example.

[0019]

[Table 1]

According to this table, in the spinning device of the present invention, the cotton drop rate is considerably reduced.

In addition, in this embodiment, the device of the type in which the twist is applied by the spindle has been described, but the spindle 7 assists in applying the twist to the yarn, and even if this does not rotate, the yarn may be manufactured depending on the yarn. As it is possible, the spindle 7 does not necessarily have to rotate.

[0022]

[Effect of the device]

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

That is, since it is possible to produce a twisted yarn in which the amount of wound fiber is extremely large and the ring yarn is comparable in appearance and tenacity, the inner diameter of the orifice is gradually reduced toward the downstream, Since the inner diameter of the fiber bundle passage was sharply expanded at the exit, the fiber loss can be further reduced compared to before.

[Brief description of drawings]

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

FIG. 2 is a sectional view of a conventional spinning device.

[Explanation of symbols]

 2 Nozzle block 3 Nozzle 4 Orifice 4a Orifice tapered inner wall 4b Orifice outlet end face 5 Guide member support 6 Guide member 7 Spindle 7a Spindle inlet 9 Spindle fiber bundle passage 18 Orifice fiber bundle passage

Claims (1)

[Scope of utility model registration request] 1. 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 fiber bundle passage that is fixed inside the inlet side and whose inner diameter is gradually reduced toward the downstream side, and an outlet side that is perpendicular thereto. The Oris system includes an Olyssis having an end face, a guide member support member fixed to the inside thereof, a hollow spindle that rotates or stands still, and a guide member that projects toward the spindle inlet with its tip end and is attached to the guide member support unit. A spinning device in which the inner diameter of the fiber bundle passage increases sharply at the exit of the fiber.