JPH0522565U - Spinning equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To further increase the tenacity and the number of twists of yarn produced in a pneumatic spinning device. 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 reduced toward the downstream side, and an outlet perpendicular to the fiber bundle passage (18). An Olyssis 4 having a side end surface 4b, a guide member support 5 fixed inside thereof so that the tip 5a is aligned with the outlet position, a hollow or rotating hollow spindle 7, and a tip directed toward the spindle inlet 7a. The guide member 6 is attached to the protruding guide member support 5, and the inner diameter of the fiber bundle passage abruptly expands at the boundary of the outlet of the Orissys 4.

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 manufactured a real twist spun yarn consisting of a nozzle block having a nozzle that causes a swirling air flow to act on the fiber bundle that has exited the draft device, a hollow spindle, and a guide member that projects toward the inlet with its tip directed. Have already proposed and filed several pneumatic spinning devices for use in such applications (see, for example, Japanese Patent Application No. 3-5469). Then, in such an air spinning device, in order to reduce the amount of fly waste discharged together with the air flow, as shown in FIG. 2, inside the inlet side of the nozzle block 2, the inner diameter is gradually reduced toward the downstream side. In another proposal, a guide member 6 is attached by fixing the guide member support 5 to the inside of the guide member 6 and fixing the guide member 6. In this spinning device, the tip 5a of the guide member support 5 is retracted inward from the exit position 4b of the Orissys 4.

[0003]

[Problems to be solved by the device]

 According to the above-described conventional spinning device, the amount of discharged cotton wool is considerably reduced, and it is possible to produce a real twist spun yarn having a certain degree of satisfactory tenacity and twist number. Some twists are not enough.

The present invention aims to further increase the tenacity and the twist number of the yarn produced in such a pneumatic spinning device.

[0005]

[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 the fiber bundle that has exited the draft device, and the inner diameter of which 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 whose tip is fixed so that its tip matches the outlet position, a hollow spindle that rotates or is stationary, and a tip to the spindle inlet. The guide member is attached to the guide member support body so as to project toward the end of the fiber bundle passage, and the inner diameter of the fiber bundle passage abruptly increases at the boundary of the outlet of the Orissis.

[0006]

[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, the suction air flow diffuses when it exits the outlet of Oris, and is rolled up upstream, promoting the open end state of the fiber bundle and pulling back the suspended fibers 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. Also, 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 nozzle, and as the yarn travels, they are spirally wrapped around the fiber bundle that is being formed into a yarn, and become a spun yarn.

[0007]

【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 has a nozzle block 2 having a nozzle 3 arranged inside a casing 1. The orifice 4 fixed inside the inlet side, the guide member support 5 fixed inside so that the tip 5a coincides with the outlet position, the guide member 6 attached thereto and the inlet side inside the casing 1. It consists of a spindle 7 inserted in the.

The spindle 7 is circumscribed by three rollers 8 (one of which is on the front side in FIG. 1 and not shown) and is circumscribed externally, 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 covering the spindle 7 has a hollow chamber 11 of a small diameter cylindrical shape formed by a bush 10 in the vicinity of the spindle inlet 7a. 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 18 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.

Unlike the conventional guide member support body 5 shown in FIG. 2, the guide member support body 5 is fixed in the orifice 4 so that the tip 5a thereof coincides with the outlet position 4b of the orifice 4. It 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 bored in the longitudinal direction, and a pin-shaped guide member 6 is provided in the hole. Is inserted.

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 at a position slightly entering 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. ing. 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 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 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.

Finally, comparing the tenacity and the number of twists of the spun yarn manufactured by the spinning device of the present invention and the spinning device shown in the conventional example, the yarn tenacity is 10.5 g / tex of the conventional one. The number of twists has been increased to 11.4 g / tex from the conventional one, 642 T / m 2, and the twist number from this invention, 841 respectively.

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

[0020]

[Effect of the device]

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

That is, since the amount of wound fiber is extremely large, a twisted yarn that is comparable to the ring yarn in terms of appearance and tenacity properties can be produced, and fiber loss is very small, and the guide part material support Since the tip of the body is aligned with the exit position of Orissys, the yarn strength and the number of twists can be increased by one layer.

[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 cross-sectional view of a nozzle block in a conventional spinning device and each member housed therein.

[Explanation of symbols]

 2 Nozzle Block 3 Nozzle 4 Orifice 4a Orifice Inner Wall 4b Orifice Outlet End Face (Exit Position) 5 Guide Member Support 5a Guide Member Support Tip 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 for causing a swirling air flow to act on a fiber bundle exiting a draft device, a fiber bundle passage fixed inside the inlet side thereof and having an inner diameter gradually reduced toward the downstream side, and an outlet side perpendicular thereto. An Olyssis having an end face, a guide member support member having a tip fixed to match the exit position inside the hollow member, a hollow or rotating spindle, and a tip member projecting toward the spindle inlet and attached to the guide member support member. And a guide member, and the inner diameter of the fiber bundle passage increases rapidly at the exit of the Orisis.