JPH0457928A - Spinning machine - Google Patents

Abstract

PURPOSE:To obtain a spinning device capable of providing an homogeneous yarn similar to a ring yarn by installing the tip of a guide member provided in a nozzle block in which turning air stream is blown out from a spiral groove toward the inlet center of a spindle. CONSTITUTION:A guide member 22 is installed in a nozzle block in which a number of spiral grooves 17 are formed on either one head face of female mold or male mold, and the tip 22a of guide member is projected toward the center of inlet 6a of the spindle. The fiber is spirally wound around a fiber bundle and the fiber bundle is passed through a fiber bundle passage 10 in a state of spun yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION A.Objective of the invention [Industrial application field] This invention produces spun yarn by heating a non-twisted staple fiber bundle drafted by a drafting device by applying a swirling air current to it. This relates to a device for

[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.

[Problem to be solved by the invention]

The yarn produced by the above-mentioned conventional spinning equipment has a structure in which other fibers are spirally wound around a core fiber that is either untwisted or twisted, and most of the fibers are twisted. The appearance is different and the thread strength is lower than that of the ring thread.

An object of the present invention is to provide an apparatus capable of producing yarn having characteristics similar to those of ring yarn using such an air spinning apparatus.

B6 Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the spinning device of the present invention comprises a male spinning device having a large number of spiral grooves formed on one of the abutting surfaces;
A guide member support having a guide member whose tip protrudes toward the center of the inlet of a rotating or stationary spindle is fixed in a female nozzle block that applies swirling airflow to the fiber bundle exiting the drafting device. It is.

[For production]

In the spinning device configured as described above, the fiber bundle exiting the draft device and sucked into the nozzle block is guided into the spindle inlet, where it is exposed to a uniform swirling airflow near the spindle inlet and is slightly false-twisted. be done. At this time, all the fibers of the fiber bundle are located around the guide member and are directly exposed to the air flow and are subjected to a force separating them from the fiber bundle, but the tips of the fibers at the entrance position of the spindle are subjected to false twisting. Because of this, it does not separate easily. The separated rear end of the fiber wraps around the outer periphery of the spindle and extends outward due to the action of the air flow, and as the fiber bundle runs, it is gradually drawn out while turning around the fiber bundle, until most of the fibers are spirally formed. It winds into a shape and becomes a real twisted spun yarn.

〔Example〕

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

This spinning device [A] is a draft bar D consisting of a pair of back rollers 26, a pair of middle rollers 28 having an apron 29, and a pair of front rollers 20, which are arranged following the sliver input guide 25 as shown in FIG. It is located next. Note that the lines extending left and right in the figure are the running paths of the fiber bundle S or yarn Y, and 27 is a sliver width regulating guide.

According to FIG. 2, the spinning device i! The details of A will be explained.

2 is a support plate fixed to the frame, to which a hollow cylindrical bearing 2, a spindle 6, and a casing 3 of a rotating body 9 are fixed. This casing 3
It consists of a pair of front and rear split molds, which are screwed together.

A spindle 6 is rotatably supported inside the bearing 2 via a bearing 4.5, and a hollow pulley 7 is inserted into the outer periphery of the spindle 6.

Reference numeral 8 denotes an endless drive belt that is suspended along the unit in contact with the outer periphery of the pulley 7 and rotates the spindle 6 at high speed. A rotating body 9 is integrally provided at a position in front of the bearing 5 of the spindle 6.

A fiber bundle passage 10 is formed through the center of the spindle 6, and the center of this passage 10 and each center of the casing 3 are
Both are located on the same straight line that coincides with the running path of the fiber bundle S.

The outer diameter of the inlet 6a of the spindle 6 is sufficiently small (inlet 6a
The portion following a is a conical portion 6b whose outer diameter increases toward the rotating body 9.

The part of the casing 3 that covers the spindle 6 and the rotating body 9 has a small-diameter cylindrical hollow chamber 1 in the vicinity of the inlet 6a of the spindle 6.
1, and the part following this hollow chamber 11 is a conical hollow chamber 12 that opens at a large angle.

A male nozzle block 23 is located in front of the small diameter hollow chamber 11.
Therefore, the fiber bundle S has a cylindrical shape with a slightly larger diameter than the tip end diameter of the spindle 6, and the cylindrical portion serves as a guide path for the fiber bundle S. In front of the conical hollow chamber 12, there is an annular hollow chamber 14 and a tangential air escape hole 1 following it.
5 is formed. An air suction pipe is connected to this air escape hole 15.

Inside the casing 3, a male nozzle block 23 and a female nozzle block 24 are closely abutted against each other. The male nozzle block 23 is shaped like a truncated cone and protrudes toward the spindle 6, and has a cylindrical hole in the center. A large number of spiral grooves 17 having a shape as shown in FIG. 3 or 4 are formed on the conical surface. The depth of the groove is about 0.5 mm. Although the groove 17 may be formed on the female nozzle block 24 side, it is better to form it on the male nozzle block 23 for ease of processing. On the other hand, the female nozzle block 24 is concave in order to receive the male nozzle block 23, and similarly has a cylindrical hole in the center. A gap is formed between the two nozzle blocks 23 and 24 by a groove 17 formed in the male nozzle block 23, and serves as a nozzle. As long as both nozzle blocks 23 and 24 are in close contact with each other, the cross-sectional shape is as shown in (I) to (■
) can be anything, including those shown below.

A hollow air reservoir 16 is formed between the casing 3 and the two nozzle blocks 23, 24, and the groove 17 communicates with the air reservoir 16. The groove 17 is oriented toward the inlet 6a of the spindle 6 and tangentially to the hollow chamber 11. An air hose 19 is connected to the air reservoir 16 through a hole 18. The direction of the groove 17 is determined by the direction of the spindle 6.
The direction of rotation is the same as the direction of rotation.

Compressed air supplied from the hose 19 flows into the air reservoir 16 and then blows out from the groove 17 into the hollow chamber 11, creating a high-speed swirling airflow near the spindle head 6a. Groove 1
Since the number of grooves 7 is very large, the airflows blown out from the outlets of adjacent grooves 17 are seamless and form one uniform vortex flow.

This airflow swirls inside the hollow chamber 11, then diffuses outward while gently swirling inside the conical hollow chamber 12, is guided toward the escape hole 15, and is discharged.

At the same time, this air flow fixes the member support 13 flowing from the nip point N of the front roller 20 into the hollow part of the casing 3. The guide member support 13 has a cylindrical shape with a thin cylindrical portion protruding from one end, and its negative side is cut out to form a gap with the nozzle plug 23, which serves as a guide path for the fiber bundle S.

Further, in the longitudinal direction of the guide member support 13, a pore is formed that coincides with the center line of the passage 10 of the spindle 6, and a pin-shaped guide member 22 is inserted into the pore.

The guide member 22 protrudes from the pore of the guide member support 13 with its tip free, and is connected to the inlet 6a of the spindle 6.
I am making it happen.

According to this method of installing the guide member 22, the entrance side of the apparatus is not blocked by the guide member 22, so that the entrance of the fiber bundle S is not obstructed.

The guide member 22 has a diameter smaller than the passage diameter of the inlet 6a of the spindle 6, and has a smoothly curved tip.

The tip of the guide member 22 is shown in FIG. 2 at a position slightly inside the passage 10 from the entrance 6a of the spindle 6, and this state is most preferable, and the yarn to be manufactured is also the most ring yarn. It has a similar appearance. However, depending on the conditions, it is possible to produce a yarn with a 6a end and an appearance similar to a ring yarn. These yarns are comparable in strength to ring yarns.

The guide member 22 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.

21 is camping.

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

The fiber bundle S, which has been trafted by the drafting device and sent out from the front roller 20, is transferred to the guide member support, 3, 3, and 23. while. The fiber bundle S is drawn into the apparatus by the air flow sucked from the gap, but before the fiber bundle S is sent out from the front roller 20, the tip of the suction pipe (not shown) is brought into contact with the outlet 30 of the cap 21, and the fiber bundle S is drawn into the spindle 6. A suction air flow is created. Therefore, due to this air flow, the fiber bundle S entering the gap
is smoothly sucked into the spindle 6.

The yarn sucked into the suction pipe through the spindle 6 is introduced into the splicing device by the 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 downstream of the exit 30 of the cap 21 is set to be slightly higher than the peripheral speed of the front roller 20, and the peripheral speed of the delivery roller is set to be slightly higher than the peripheral speed of the front roller 20. , I try to maintain tension all the time.

The fiber bundle S is guided into the inlet 6a of the spindle 6 by the action of a uniform jetted airflow from the outlet of the groove 17, and is subjected to the action of a compressed airflow swirling in the vicinity of the spindle 6a, causing the fiber bundle S to temporarily move in the same direction. twisted. At this time, the fiber bundle S is
The presence of the guide element 22 makes it impossible to position it in the space occupied by this guide element 22.

Therefore, all the fibers will be located around the guide member 22 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 tip of the fiber is at the inlet 6a position of the spindle 6, the tip is subjected to false twisting as described above, and therefore is not easily separated.

Further, the rear ends of the fibers are not separated yet because they are nipped by the front roller 2o or are located far from the exit of the groove 17 and are not affected by much air.

The rear end of the fiber leaves the front roller 20 and enters the groove 17.
The fiber bundle S is separated from the fiber bundle S only when it comes to a position where it is strongly affected by the air flow from the outlet of the fiber bundle S. The separated fiber rear end is
Due to the action of the air flow, it wraps around the input hole 6a of the spindle 6 once or multiple times, and then wraps around the conical portion 6b of the spindle 6.
After wrapping around a little, it is guided by the rotating body 9 and extends outward.

Furthermore, the fiber bundle S continues to travel downward in FIG.
It is gradually pulled out while circling around it.

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 10.

The winding direction of the wound fiber is the direction of the groove 17 and the direction of the spindle 6.
Determined by the direction of rotation. The swirling direction of the air flow from the outlet of the groove 17 is preferably set in the same direction as the rotation direction of the spindle 6 so as not to disturb the winding direction of the wound fibers and to prevent the fiber tips from separating.

As described above, according to the apparatus of this embodiment, the spindle 6
The false twist that is about to propagate to the front roller 20 side from
Its propagation is prevented by the guide member 22, and the fiber bundle S leaving the front roller 20 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 22 is not installed, a striped portion in the traveling direction is generated near the center of the flat fiber bundle sent out from the front roller 20 in the roller width direction.

Although this example describes a type of spinning device that uses a spindle to apply twist, other spinning devices, such as a two-nozzle type bundled spun yarn manufacturing device, may have a guide member provided at the first nozzle inlet, or Application to a spinning device using a nip type twister or a one-nozzle type spinning device is also possible depending on the conditions. Further, the spindle 6 assists in twisting the yarn, and depending on the yarn, it is possible to manufacture the yarn even if the spindle 6 does not rotate. Therefore,
The spindle 6 does not necessarily need to rotate.

Effects 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 wrapped fibers and comparable in appearance and strength to ring yarn.

In particular, since the swirling airflow is blown out from a nozzle block consisting of a male mold and a female mold, each of which has a large number of spiral grooves formed on one of the abutting surfaces, the swirling airflow becomes one uniform flow and is produced. The thread becomes extremely homogeneous, including its appearance. Also, since the nozzle block consists of a male type and a female type, it has the advantage of being easy to disassemble and clean.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of a spinning device to which the device of the present invention is applied, Fig. 2 is a sectional view of the device of the present invention, and Figs. 3 and 4 are male nozzles with different grooves formed therein. A view of the block from the spindle side, Figures 5 (I) to (I
II) is a sectional view of an abutting portion of a male nozzle block and a female nozzle block in which different grooves are formed. 6---Spindle, 6a---1-Spindle inlet, 13---Guide member support, 17---Groove,
22 guide member, 23-1----male nozzle block, 24...-1--female nozzle block, D----
--Draft device, S--Fiber bundle agent Patent attorney Yasushi Moto Fujii Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A nozzle block consisting of a male die and a female die with a large number of spiral grooves formed on either abutting surface applies swirling airflow to the fiber bundle exiting the drafting device, and is placed at the center of the inlet of a rotating or stationary spindle. A spinning device in which a guide member support having a guide member protruding toward its tip is fixedly installed.