JPS62141132A - Apparatus for producing spun fiber - Google Patents

Abstract

PURPOSE:To enable sure and instantaneous threading of fiber bundle, by placing a suction apparatus opposite to an air ejection nozzle interposing a false-twisting apparatus therebetween and sucking a fiber bundle delivered from the false twisting apparatus. CONSTITUTION:A clutch of a back roller 7 is actuated in the case of yarn ending to start the feed of a fiber bundle S and, at the same time, to suck a yarn Y by temporarily driving a suction apparatus 12. A package P is separated from a friction roller 15, a suction pipe 20 and a suction mouth 21 are turned to respective positions shown by alternate long and short dash lines, the upper and lower yarns are sucked, the pipe and the mouth are returned to the positions shown by solid lines and both yarns are guided to a knotter 18. When both yarns are ended together by the knotter 18, the package P is pressed against the friction roller 15 to restart the winding operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for producing spun yarn by heating short fiber bundles.

[Conventional technology]

In place of conventional ring-type spinning machines, attempts have been made to develop various types of spinning equipment to increase spinning speed, reduce the number of spinning steps, and improve yarn quality, such as oven-end spinning machines and air-type spinning machines. has already been proposed. As a typical example of the above-mentioned pneumatic spinning machine, two air injection nozzles are arranged along the travel path of the fiber bundle, and two air streams swirling in different directions are sequentially applied to the fiber bundle by these nozzles. There is an apparatus for producing spun yarn by heating a fiber bundle. This device enables leap-speed spinning several times faster than that of a ring-type spinning machine, and by increasing the pressure of the air flow, the spinning speed can be further increased. However, if the spinning speed were to be significantly increased, energy consumption would rapidly increase, making it difficult in practice, and the development of a new spinning device capable of solving this problem has been awaited.

As an example of a device developed to meet such demands, there is a device disclosed in Japanese Patent Application Laid-Open No. 60-88132.

This device includes an air injection nozzle for applying a unidirectional swirling air flow to the fiber bundle exiting the draft device, and a belt-type false twisting device for false twisting the fiber bundle exiting the nozzle. . This belt-type false twisting device consists of two endless belts that intersect and run in different directions, and is a device that performs false twisting by nipping the fiber bundle between both belts. It has the advantages of direct nipping, which improves the false twisting efficiency, and the running of the belt, which imparts a feeding force to the fiber bundle, which reduces yarn breakage.For these reasons, this spinning device has the advantages of the above two It has been confirmed that this system can achieve even higher speed spinning than spinning devices that use nozzles.

[Problem that the invention seeks to solve]

In a spinning device using the belt-type false twisting device described above, the problem is how to pass the fiber bundle through the false twisting device before starting spinning. In other words, the fiber bundle becomes a strong spun yarn only after passing through the false twisting device, and since the fiber bundle before passing through the false twisting device has extremely low strength, it cannot be handled by hand or with a device. If you try to operate it, it will easily break. The present invention aims to solve such problems.

[Means for solving problems]

The present invention provides a spinning device in which the above-described air injection nozzle and belt-type false twisting device are sequentially arranged, and the fiber bundle exiting from the false twisting device is placed at a position opposite to the air injection nozzle with the false twisting device in between. It is characterized by being equipped with a suction device for suction.

[Effect]

The fiber bundle coming out of the air injection nozzle is introduced into the false twisting device by the air flow from the nozzle, then receives a sending force in the direction of the suction device by the running force of the belt in the false twisting device, and is further suctioned by the suction device. Receive power. Since the speed of the fiber bundle is so high that these forces act on the fiber bundle almost simultaneously, the fiber bundle passes instantaneously between the belts of the false twisting device and is drawn into the suction device.

〔Example〕

FIG. 2 schematically shows a side view of the spinning device according to the invention.

(1) is a main body frame having a U-shaped cross section and having a bogie running space (2) inside, and extending long in the front-rear direction in the drawing. (3) and (4) are rails arranged along the frame (1), and along the rails (3) and (4), the thread splicing cart (5) moves inside the cart running space (2). Runs forward and backward. (6) is a bank roller (7), a middle roller (
8) and a draft device consisting of a front roller (9), (10) an air jet nozzle, (11) a belt-type false twisting device, (12) a suction device, and (13) a delivery roller. These draft devices (6), air injection nozzles (10), false twisting devices (11), suction devices (12)
and the delivery roller (13) are the fiber bundles (
S) are sequentially arranged in a substantially straight line along the running path, and a large number of weights are arranged on the main body frame (1) in the front-rear direction in the plane of the drawing.

(K) is a sliver can installed behind the main body frame (1), and the untwisted sliver, that is, the fiber bundle (S) drawn from the drawing machine and drawn from the eight cans (K), is drawn from the drafting device (6). It becomes a spun yarn (Y) through an air injection nozzle (10) and a false twisting device (11). Grasp (Y)
further includes a suction device (12) and a pre-heli roller (13).
) and a slab catcher (14), then it is wound onto a package (P) which is rotationally driven by a friction roller (15).

(16) is a duct having an opening at the thread exit portion of the suction device (12), and its base end communicates with an air suction source, ie, a blower (not shown). A cutter (17) is provided between the opening of the duct (16) and the delivery roller (13), and is activated by a signal from the slab catcher (14) to cut the yarn (Y). Furthermore, the yarn splicing cart (5) is equipped with a knock (18), a suction pipe (20) and a suction mouth (21) that communicate with the blower (19). The yarn splicing operation described below is performed by stopping at a dead weight. That is,
When the slab catcher (14) detects a defective part of the yarn (Y), a signal from the slab catcher (14) turns off a clutch (not shown) attached to the bank roller (7) and stops the roller (7). At the same time, cutter (1
7) cuts the thread (Y). In addition, the yarn splicing cart (5) running in the space (2) stops at the weight where the yarn breakage occurs due to the above signal, and connects the upper yarn on the spinning side and the lower yarn on the package (P) side to each other. to inherit. In the yarn splicing operation, first, the clutch of the bank roller (7) described above is turned on to start feeding the fiber bundle (S), and at the same time, the suction device (12), which will be described in detail later, is temporarily activated to splice the yarn ( At this time, the package (P) is separated from the friction roller (15) by a device (not shown). Next, the suction pipe (20) and the suction mouth (21) each turn to the position shown by the dashed line to suction the upper thread and the lower thread, and then return to the position shown by the solid line to guide both threads to the knock (18). , After the knock (18) splices both yarns, the package (P) is moved to the friction roller (15).
The winding is restarted by pressure contact. (22) is a duct for absorbing the slack of the upper thread that occurs during this splicing.

In FIG. 1, the air injection nozzle (lO) is connected to the fiber bundle (S
) and a linear thread passage (25) for passing the thread (25).
5) has a plurality of air ejection holes (26) formed on the inner circumferential surface of the air blower. The spout hole (26) opens tangentially to the cylindrical inner surface of the yarn passageway (25) and is inclined toward the false twisting device (11). Compressed air is constantly supplied to the jet hole (26) from a compressed air source (not shown), and this compressed air is jetted from the jet hole (26) into the yarn passageway (25) and goes to the false twisting device (11). The swirling air flow acts on the fiber bundle (S) in the yarn path (25) and causes the fiber bundle (S) to balloon. Also air injection nozzle (lO)
The fiber bundle entrance (27) is close to the nip point (N) of the front roller (9) of the draft device (6), and the guide pipe (28) formed at the fiber bundle exit is connected to the false twist bag W.
(11) is approaching the nip starting point (nl). A ring-shaped fiber bundle guide (29) is provided at the end of the guide pipe (28), and serves to reliably maintain the fiber bundle (S) at the nip starting point (nl).

The heald type false twisting device (11) consists of two endless belts (Bl) (B2) wound around a driving pulley (31) and a driven pulley (32), respectively.
l) The belts (B2) are arranged to cross each other in an X-shape, and the fiber bundle (S) is nipped between them, and each belt is constantly driven to run in the directions of arrows (33) and (34), respectively. A component of this running force applies a false twist in a certain direction to the fiber bundle (S), and at the same time, the suction device (1
2) sent out in the direction. The direction of twist at this time is set to be opposite to the swirling direction of the air flow jetted out from the jetting hole (26) of the blank jetting nozzle (10).

A false twist is formed on the fiber bundle (S,) exiting the draft device (6) by a belt forming device (11),
This twist propagates on the fiber bundle (S) to the nip point (N) of the front roller (9). Immediately after leaving the front roller (9), the fibers at the center of the fiber bundle (S) are caught by the twisting, and the fibers at the outer periphery are not caught and protrude like fluff from the center of the fiber bundle. The fiber bundle (S) in such a state is then subjected to the action of a swirling air flow in the air injection nozzle (10), and is ballooned in the opposite direction to the twisting direction, and at this time, the fluffy fibers on the outer periphery of the fiber bundle are is wound in the same direction as the swirling direction of the air flow, that is, in the opposite direction to the twisting direction of the fiber east width core. Next, such a fiber bundle (S) is
When passing the nip end point (B2) of the fiber bundle (11), the fibers at the center of the fiber bundle become untwisted or twisted, and the fibers at the outer periphery are twisted around the center fiber. As a result, the fiber bundle (S) becomes 1
It becomes the binding spun yarn (Y) of the book.

The suction device (12) has a linear thread passageway (3) through which the thread (Y) passes.
5) and a plurality of air jet holes (
a guide pipe (37) having a guide pipe (36);
37), and a continuous pipe (39) connected to the guide pipe (37).
Consisting of

The thread passage (35) is relatively narrow on the temporary 128 device (11) side with the opening of the spout hole (36) as the boundary, and the delivery roller (
13) The sides are relatively thick.

The ejection hole (36) is inclined toward the delivery roller (13) and opens into the thicker yarn path. Further, one end of the force 1 vibe (37), ie, the end (40) of the portion having the narrower thread passage, is close to the nip end point (n2) of the false twisting device (11). Furthermore, the main body block (
38) is formed with an annular air chamber (42) that communicates with the air outlet (36) and is also connected to a compressed air source (not shown) via a pipe (41). A solenoid valve (43) is provided in the middle of the pipe (41), and when the valve (43) opens, compressed air flows from the pipe (41) through the air chamber (42) and the jet hole (36). ejects into the yarn path (35), thereby causing the yarn path (35
), there is a delivery roller (13) from the temporary m device (11) side.
) creates an airflow that flows toward the side. The solenoid valve (43) opens at the same time when the yarn splicing cart (5) stops for yarn splicing and the clutch of the bank roller (7) is turned on.
The suction force acting on the guide vibrator end (40) sucks the yarn (Y) coming out of the false twisting device (11) and transfers it to the delivery roller (
13) After the air is supplied in the direction, it is closed again by a timer (not shown) and the supply of air is stopped. The continuous vibrator (39)' is screwed onto the outer periphery of the guide pipe (37), and is adjusted so that its end (44) is located near the opening of the duct (16).

As mentioned above, when the clutch of the bank roller (7) is turned on and the solenoid valve (43) is opened during yarn splicing, the fiber bundle (S
) passes through the draft device (6) to the air injection nozzle (10
) and further guided to the false twisting device (11) by the swirling air flow in the nozzle (10) (both bells) (81)
(B2) 0 then false twisting device ffi nipped between
The fiber bundle (S) in (11) is the belt (Bl) (B2)
As the thread travels, it receives a sending force and receives a suction force from the suction device (12), passes through the inside of the thread passage (35) and is sucked by the duct (16).Then, the solenoid valve (43) closes, and the suction pipe ( 20) turns to the position shown by the dashed line in FIG. 1, pulls out the thread (Y) drawn into the duct (16), guides it to the knock (18), and splices the thread. The false twisting device (11) may be arranged so that both belts (Bl) and (B2) are separated from each other only when threading as described above, but when they are pressed against each other as in normal false twisting operation. Can be fully threaded.

In addition, in order to ensure this threading, an air injection nozzle (
10) and each guide pipe end of the suction device (12) (
29) (40) is the belt nip point (nl
) (n2) is preferable. Also, in this way, each end (29) (40) is connected to each nip point (nl).
By placing the fiber bundle (S) close to (n2), the fiber bundle (S) is reliably maintained at the center of the intersection of both belts even during normal false twisting operation, and fluctuations in the fiber bundle running path are prevented, resulting in less twisting irregularities. High quality yarn (Y) can be produced.

Note that although the solenoid valve (43) can be kept open all the time, this is not preferable in terms of energy consumption. In addition, if fluff, etc. adheres to the thread passageway (35) of the suction device (12), open the solenoid valve (43) appropriately after a predetermined period of time to clean the inside of the passageway (35) with air flow. You can also do it. Further, an air jet hole (36) is provided tangentially in the same manner as the jet hole of the air jet nozzle (10),
It is also possible to generate a swirling air flow in the same direction or in the opposite direction to lO).

〔Effect of the invention〕

According to the present invention, in a spinning device equipped with an air injection nozzle and a belt-type false twisting device, a fiber bundle can be reliably passed through the false twisting device. According to the present invention, thread breakage hardly occurs at this time, and the thread can be threaded instantly without the need for troublesome operations, which can greatly contribute to improving production efficiency.

[Brief explanation of drawings]

FIG. 1 is a side view showing essential parts of the present invention, and FIG. 2 is a side view schematically showing the entire spinning apparatus according to the present invention. (lO)... Air injection nozzle (11)... Belt type false twisting device (12) --... Suction device

Claims (1)

[Claims] Along the running path of the fiber bundle, a false twisting device consisting of two belts running in different directions intersecting with an air injection nozzle that applies a swirling air flow to the fiber bundle is sequentially installed. 1. A spun yarn manufacturing apparatus equipped with a suction device for sucking fiber bundles exiting the false-twisting device at a position opposite to the air injection nozzle sandwiching the false-twisting device. manufacturing equipment.