JPH0465531A - Spinning machine - Google Patents

Abstract

PURPOSE:To twine a floating fiber in a spindle around a fiber bundle in a passage of the fiber bundle by circulating a turning air stream in a circular space, introducing the air stream through a spindle inlet into the passage of the fiber bundle and discharging the air stream through an air passage of a bush. CONSTITUTION:A fiber bundle drafted and sent out from a front roller is taken into an apparatus by an air stream sucked through a gap 22 and false twist is applied thereto to a small extent using a force of a turning compressed air stream in the neighborhood of a spindle inlet in a state where the fiber bundle is sucked into the spindle 13. The separated back end part of the fiber bundle is wound around the inlet part of the spindle by an action of the air stream, extended to the inside of a circular concave part 17 and gradually taken out while turning around the fiber bundle. The spun yarn (Y) is then made to pass through a passage 11 of the fiber bundle and a floating yarn is twined around the yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for producing spun yarn by applying swirling airflow to and heating untwisted short fiber bundles trafted by a traft device.

[Conventional technology]

As a conventional pneumatic spinning device, the following spinning device is known (see Japanese Patent Laid-Open No. 85123/1983).

This device includes a rotating spindle that has a passage through which the fiber bundle exits from the front roller of a draft device, and an air injection nozzle that applies a swirling air flow near the inlet of the spindle to separate the fiber ends from the fiber bundle. The fiber ends are wound around the fiber bundle.

Further, the swirling air flow is sucked and discharged by a blower.

41 Purpose of the Invention [Problem to be Solved by the Invention] The yarn produced by the above-described conventional spinning device has a property in which other fibers are spirally wound around a non-twisted or twisted core fiber. The appearance is different and the yarn strength is lower than that of ring yarn, which is made of twisted fibers.

There is also the problem that a large amount of loose fibers are discharged together with the air discharged by the blower.

This invention can produce yarn with characteristics similar to ring yarn in such a pneumatic spinning device,
The purpose is to provide a device with less fiber loss.

1. Structure of the Invention [Means for Solving the Problem] In order to achieve the above object, the spinning device of the present invention includes a nozzle block that applies a swirling airflow to the fiber bundle exiting the draft device, and an enlarged outlet. a spindle that is integral with the housing and has a fiber bundle passage; a guide member support that is fixed within the nozzle block and that has a guide member that protrudes with its tip directed toward the center of the inlet; It consists of a bush that passes through a thin thread passage and an air passage around it, and an annular space that guides the swirling airflow that circulates and returns from the spindle entrance into the fiber bundle passage, and the swirling airflow is discharged only from the fiber bundle passage of the spindle. It is something to do.

[Function] In the spinning device configured as described above, the fiber bundle exiting the traft device and sucked into the nozzle block is guided into the spindle inlet, exposed to swirling airflow near the spindle inlet, and slightly False twisted. At this time, the fiber bundle is prevented from ballooning due to the presence of the thread passage in the bush, and all the fibers are located around the guide member, are directly exposed to the air flow, and are subjected to a force that separates them from the fiber bundle, but at the entrance of the spindle. The tips of the fibers in position are not easily separated because they are undergoing false twisting. The separated fiber rear end is
Due to the action of the air flow, it wraps around the outer circumference of the spindle and extends outward, and as the fiber bundle runs, it is gradually pulled out while turning around the fiber bundle, and most of the fibers are wound in a spiral shape, creating a real twist. It becomes spun yarn.

Further, the swirling air flow circulates within the annular space, is guided from the spindle inlet into the fiber bundle passage, and is smoothly discharged through the air passage of the bush. Floating fibers guided into the spindle with the swirling air flow become entangled with the fiber bundle in the fiber bundle passage and become part of the yarn.

〔Example〕

Embodiments of the spinning device of the present invention will be described with reference to the drawings.

As shown in FIG. 1, this spinning device A is located next to a draft part D consisting of a pair of back rollers 2, a pair of middle rollers 4 having an apron 3, and a pair of front rollers 5, which are arranged following a sliver input guide 1. It is located in Note that the lines extending left and right in the figure are the running paths of the fiber bundle S or yarn Y, and 6 is a sliver width regulating guide.

The details of the spinning device will be explained with reference to FIG.

7 is a support plate fixed to the frame, and a housing 8 is fixed to this.

A male type and female type nozzle block 9, 10 are installed in the interior space of the entrance of the housing 8, and a fiber bundle passage 11 is formed therethrough at the center thereof. The exit of the fiber bundle passage 11 is wide open in the shape of a trumpet. A portion 13 of this fiber bundle passage 11 including a slightly protruding entrance portion 12
However, in the conventional device, this part functions as a rotating spindle. Furthermore, a mounting block 23 is disposed inside the housing 8 following the spindle 13.

The distance between the entrance 12 of the spindle 13 and the nip point N of the front roller 5 is set to be shorter than the average length of the fibers constituting the fiber bundle S.

The male nozzle block 9 has a cavity inside, and the inner wall thereof is narrowed toward the inlet 12 of the spindle 13 to approximately the same diameter as the spindle head 12. A guide passage for the fiber bundle S is formed between the narrowed inner wall and a guide member support 14 and a guide member 15, which will be described later. The fiber bundle S supplied to the gap is narrowed and
Converged. Therefore, the number of fibers that become floating fibers and fly away is reduced, and fiber loss can be reduced. The constriction structure of the male nozzle block 9 is not limited to that shown in the drawings, and may be such that only the inner wall of the outlet of the male nozzle block 9 is annularly constricted.

The male nozzle block 9 and the female nozzle block 10 are
They are closely abutted to each other, and the male nozzle block 9 projects toward the spindle 13 in the shape of a truncated cone.

Four spiral grooves 16 are formed on the conical surface. The depth of the groove is approximately 0.50°. Although the groove 16 may be formed in the female nozzle block 11O, it is preferable to form it in the male nozzle block 9 for ease of processing.

On the other hand, the female nozzle block 10 is concave to receive the male nozzle block 9, and a gap is created between the two nozzle blocks 9 and 10 by a groove 16 formed in the male nozzle block 9. formed and acts as a nozzle.

Instead of having such a nozzle configuration, a single nozzle block may be used, and nozzle holes may be formed in it.

An annular recess 17 is formed in the inner wall of the housing 8 on the downstream side of the female nozzle block 10.
The part that covers the vicinity is defined as an annular space 18.

A hollow air reservoir 19 is formed between the housing 8 and both nozzle blocks 9 and 10, and the groove 16 is connected to the air reservoir 1.
It is connected to 9. The direction of the groove 16 is towards the inlet 12 of the spindle 13 and tangential to the annular space 18 . An air hose 21 is connected to the air reservoir 19 through a hole 20.

The compressed air supplied from the hose 21 flows into the air reservoir I9 and then blows out from the groove 16 into the annular space 18, creating a high-speed swirling air flow in the vicinity of the spindle population 12.

After swirling inside the annular space 18, this air flow is led into the fiber bundle channel ll from the inlet 12 of the spindle 13 and smoothly discharged from the outlet 27 through the air channel of the bush. Moreover, this air flow simultaneously generates a suction air flow that flows into the hollow portion of the housing 8 from the nip point N of the front roller 5.

When the swirling air flow is guided from the spindle population 12 into the fiber bundle channel 11, the floating fibers separated from the fiber bundle S are also guided into the fiber bundle channel 11.

A guide member support 1 is provided on the inner wall of the male nozzle block 9.
4 is fixed. The guide member support 14 has a cylindrical shape with one end protruding conically, and the negative side is cut out to form a gap 22 between it and the male nozzle block 9, and serves as a guide path for the fiber bundle S. There is. By causing one end of the guide member support 14 to protrude in a conical shape in this way, the fibers of the fiber bundle S supplied from the gap are less likely to be wound around, and even if they are wound around, the amount is very small and easy to unravel.

Further, in the longitudinal direction of the guide member support 14, a pore is formed that coincides with the center line of the passage 11 of the spindle 13, and a pin-shaped guide member 15 is inserted into the pore.

The guide member 15 protrudes from the pore of the guide member support 14 and has a free end, and is connected to the inlet 1 of the spindle 13.
2 is on the way.

According to this method of installing the guide member 15, the entrance side of the apparatus is not blocked by the guide member 15, so that the entrance of the fiber bundle S is not obstructed.

The guide member 15 has a diameter smaller than the passage diameter of the inlet 12 of the spindle 13, and has a smoothly curved tip.

The tip of the guide member 15 is shown in FIG. 2 at a position slightly inside the passage 11 from the spindle entrance 12, and this state is most preferable, and the yarn to be manufactured is also the closest to the ring yarn. It has an appearance. However, depending on the conditions, it is also possible to position the inlet 12 away from the end face, and it is possible to manufacture a thread having an appearance similar to a ring thread. These yarns are comparable in strength to ring yarns.

The guide member 15 functions as a so-called pseudo core, which prevents the propagation of twist in the yarn forming process described later, or temporarily takes the place of the central fiber bundle, and eliminates the disadvantages that appear conspicuously in conventional pneumatic bound spun yarns. This serves to prevent the formation of twisted core fiber bundles and virtually form yarns only from the wound fibers.

As shown in FIG. 3, the bushing 23 has a thread passage 2 in the center.
4 and several air passages 25 around it. The diameters of the thread passage 24 and air passage 25 are:
1 each. It is about 2 to 2■, 3■. This narrow yarn passage 24 prevents the yarn from bulging and thus prevents the fiber bundle S from deviating from the center of the guide member 15 upstream thereof. The air passage 25 is a discharge path through which the swirling air flow goes around and escapes from the trumpet-shaped outlet of the spindle I3.

26 is a cap. When the swirling airflow cannot be smoothly discharged from the fiber bundle passage 11 of the spindle 13,
It is preferable to provide the cap 26 with a blower or the like that sucks air from the fiber bundle passage 11.

Next, the yarn manufacturing process using this actual twisted kite yarn manufacturing apparatus A will be explained.

The fiber bundle S that has been drafted by the drafting device and sent out from the front roller 5 is drawn into the device by an air flow sucked from the gap 22 between the guide member support 14 and the male nozzle nozzle 9. It is constricted and converged at the nozzle block exit and guided into the spindle inlet,
Prior to sending out the fiber bundle S from the front roller 5, the tip of a suction pipe (not shown) comes into contact with the outlet 27 of the cap 26, creating an air flow sucked into the spindle 13. Therefore, due to this air flow, the interval lIi+22
The fiber bundle S entering the spindle 13 is smoothly sucked into the spindle 13.

The yarn sucked into the suction pipe through the spindle 13 is introduced into the splicing device by movement of the suction pipe, and spliced with the yarn on the package side, which has also been introduced by the suction mouth.

The peripheral speed of the delivery roller provided on the downstream side of the outlet 27 of the cap 26 is set to be slightly higher than the peripheral speed of the front roller 5, and the peripheral speed of the delivery roller is set to be slightly higher than the peripheral speed of the front roller 5. , I try to maintain tension all the time.

The fiber bundle S is guided into the inlet 12 of the spindle 13 by the action of the airflow ejected from the outlet of the groove 16, and is subjected to the action of the compressed airflow swirling near the spindle 12, and is slightly false twisted in the same direction. Ru.

At this time, ballooning of the fiber bundle S is suppressed due to the presence of the thread passage 24 of the bush 23, and the fiber bundle S is prevented from ballooning by the guide member 15.
Due to the presence of the guide member 15, it is impossible to locate it within the space occupied by this guide member 15.

Therefore, all the fibers will be located around the guide member 15 and will be directly exposed to the air flow and will be separated from all around the entire outer periphery, and the fibers located inside will also be exposed to the air flow and the fiber bundle S receives the force of separation from However, when the fiber tip is at the spindle entrance 12 position,
Since the tip is false-twisted as described above, it does not separate easily. Further, the rear ends of the fibers have not been separated yet because they are nipped by the front roller 5 or located far from the exit of the groove 16 and are not affected by much air. The rear end of the fiber is separated from the fiber bundle S only after it leaves the front roller 5 and comes to a position where it receives a strong air flow from the outlet of the groove 16. The separated fiber trailing end wraps around the inlet 12 of the spindle one or more times under the action of the air flow and subsequently extends into the annular recess 17 of the housing 8.

Further, the fiber bundle S continues to travel downward in FIG. 2, and the trailing end of the fiber is gradually drawn out while turning around the fiber bundle S.

As a result, the fibers are spirally wound around the fiber bundle S, and the fiber bundle S becomes a spun yarn Y and passes through the fiber bundle passage 11.

The winding direction of the wound fibers is determined by the direction of the grooves 16.

On the other hand, the floating fibers guided into the fiber bundle passage 11 from the spindle head 12 along with the swirling airflow become entangled with the yarn and become part of the yarn. Therefore, by eliminating the air vent, it is possible to almost eliminate fiber loss, which conventionally used to escape from the blower by as much as 20%. Air is exhausted from the air passage 25 of the bushing 23.

As described above, according to the apparatus of this embodiment, the spindle 1
The false twist that is about to propagate from 3 to 70 controller 5 side is
Its propagation is prevented by the guide member 15, and the fiber bundle S leaving the front roller 5 is not twisted by false twisting, and most of the fibers become wound fibers.

This can be confirmed by the fact that when the guide member 15 is not installed, a striped portion in the running direction is generated near the center of the flat fiber bundle sent out from the front roller 5 in the roller width direction.

C1 Effect of the invention Since this invention is configured as explained above,
This produces the effects described below.

That is, it is possible to produce a real twisted yarn with an extremely large amount of wound fibers and comparable in appearance and strength to ring yarn.

Further, since the air vent is eliminated and the swirling airflow that circulates and returns is guided into the fiber bundle passage from the spindle inlet, fiber loss can be almost completely eliminated.

Furthermore, since the bushing is provided on the downstream side of the spindle, the ballooning of the fiber bundle can be suppressed through the thread passage, and the fiber bundle can be always positioned around the guide member to produce a homogeneous thread, and the air can be It can be smoothly discharged from the passage.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of a spinning apparatus to which the apparatus of the present invention is applied, FIG. 2 is a cross-sectional view of the apparatus of the present invention, and FIG. 3 is a view of a bush viewed from the fiber bundle inlet side. 9-Male nozzle block, 10-Female nozzle block, 11-Fiber bundle passage, I 2--Inlet of spindle, 13 Spindle, 14 Guide member support, 15-=Chi 8 member, 16 groove, 18 Annular space, 2
3 Bush, 24 Bush yarn passage, 25 Bush air passage, D Traft device, S Fiber bundle agent Patent attorney Yasushi Moto Fujii

Claims (1)

[Claims] 1. A nozzle block that applies a swirling airflow to the fiber bundle exiting the draft device, a spindle that has a fiber bundle passage with a widened outlet and is integral with the housing, and a guide member that protrudes with its tip toward the center of the inlet. The guide member support is fixed in the nozzle block, and the bushing is disposed on the downstream side of the spindle and has a thin thread passage in the center and an air passage around it. A spinning device that consists of an annular space that leads into the fiber bundle passage and discharges swirling airflow only from the fiber bundle passage of the spindle.