JPH04163325A - Spinning machine - Google Patents

Abstract

PURPOSE:To provide a spinning machine capable of giving a yarn comparable to ring yarn by placing two nozzles at the front and the back parts of a spindle, protruding a guide member toward the inlet part of the spindle and rotating the spindle in the direction same as that of gyrating air flow. CONSTITUTION:A 1st nozzle 4 is attached to a nozzle block 3 containing a guide member-supporting part 6 holding a guide member 7. A gyrating air flow is applied to a fiber bundle delivered from a drafting apparatus. A 2nd nozzle 8 forming an air flow gyrating in the same direction as the former air flow is placed at the back of a spindle 5 rotating in the same direction. The twist transmitted downstream by the 1st nozzle is untwisted and eliminated by the rotation of the spindle 5 and the gyrating air flow generated by the 2nd nozzle 8 to leave a uniform twist of the opposite twist direction.

Description

Detailed Description of the Invention 41 Purpose of the Invention [Field of Industrial Application] This invention produces spun yarn by applying a swirling airflow to a non-twisted short fiber bundle trafted by a traft device and heating it. It is related to the 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 coming out of the front roller of the drafting device passes, 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 the property that other fibers are wound in a spiral shape around a non-twisted or twisted core fiber, and most of the fibers are twisted. The appearance is different and the thread strength is lower than that of the ring thread.

It is an object of the present invention to provide an apparatus capable of producing yarn having the same characteristics as ring yarn using such an air spinning apparatus.

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 having a first nozzle that applies a swirling airflow to the fiber bundle exiting the draft device. , a spindle that rotates in the same direction as the swirling airflow, a guide member support fixed within the nozzle block having a guide member protruding with its tip toward the inlet, and a guide member support that is provided downstream of the spindle and rotates in the same direction as the swirling airflow. It consists of a second nozzle that applies a swirling airflow in the same direction.

[For production]

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 and is exposed to swirling airflow near the spindle inlet, where it is slightly false-twisted. . 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 one spindle and extends outward due to the action of the air flow, and as the fiber bundle travels, it is gradually pulled out while turning around the fiber bundle. The fibers are wound in a spiral to form a real twisted spun yarn.

At this time, the twist transmitted downstream by the first nozzle is unraveled to zero by the rotation of the spindle and the swirling airflow of the auxiliary nozzle, and a uniform twist in the opposite direction remains.

〔Example〕

An embodiment of the spinning device of the present invention will be described with reference to FIGS. 1 and 2.

This spinning device is arranged next to a raft part consisting of a back roller, a middle roller, and a front roller. The front roller 1 is shown in FIG.

The spinning device includes a guide member support 6 having a guide member 7.
a nozzle block 3 which houses therein and has a first nozzle 4;
, a rotating spindle 5, and a second nozzle 8 are arranged in order within the casing 2.

A hollow air reservoir 9 is formed between the casing 2 and the nozzle block 3. The nozzle block 3 has four air holes each having a diameter of 0.4 mm, communicating with the air reservoir 9, facing downstream slightly away from the inlet 5a of the spindle 5, and facing tangentially to the hollow chamber IO around the spindle 5. A first injection nozzle 4 is formed, and an air hose 12 is connected to the air reservoir 9 through a hole 11. The first nozzle 4 is oriented in the same direction as the rotational direction of the spindle 5.

The compressed air supplied from the hose 12 flows into the air reservoir 9 and then is ejected from the first nozzle 4 into the hollow chamber 1o, creating a high-speed swirling airflow near the spindle port 5a.

This air flow swirls inside the hollow chamber 10 and then flows through the escape hole 1
It is guided in three directions, drawn into an air suction pipe and discharged. At the same time, this air flow generates a suction air flow that flows from the nip point N of the front roller 1 into the hollow part of the casing 2.

Further, a guide member support 6 is fixed to the inner wall of the nozzle block 3. The guide member support 6 has a cylindrical shape with a thin cylindrical portion protruding from one end, and its negative side is cut out to form a gap 14 between it and the nozzle block 3, which serves as a guide path for the fiber bundle.

Further, in the longitudinal direction of the guide member support 6, a pore is formed that coincides with the center line of the passage 15 of the spindle 5, and a pin-shaped guide member 7 is inserted into the pore.

The guide member 7 protrudes from the pore of the guide member support 6, leaving its tip free and facing the population 5a of the spindle 5.

According to this method of installing the kite member 7, the entrance side of the apparatus is not blocked by the guide member 7, so that the entrance of the fiber bundle is not obstructed.

The guide member 7 has a diameter smaller than the passage diameter of the inlet 5a of the spindle 5, and has a smoothly curved tip.

The tip of the guide member 7 is shown in FIG. 1 at a position slightly inside the passage 15 from the entrance 5a of the spindle 5, 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 take a position away from the entrance 5a, 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 7 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.

The inner diameter of the inlet 5a of the spindle 5 is approximately 8 mm, and the portion following the inlet 5a is a conical portion 5b whose outer diameter increases toward the downstream side.

The spindle 5 is supported and driven by three rollers 16, 17, 18, as shown in FIG. These rollers 16, 17, 18 are located on the outside of the casing 2, and their peripheral portions face inward through the slits, pressing against the edge of the spindle conical portion 5b from three sides. three rollers 16
．． 17. One of the rollers 8 is a drive roller rotating at 10,000 rpm. The spindle 5 may be supported by a bearing on the gauging 2 or without contact.

Immediately after the spindle 5 there is a thread with a diameter of 0.3 mm oriented tangentially to the thread passage 19 of the casing, which has a diameter of 2.2 mm.
Eight air injection second nozzles 8 are formed in the second nozzle 8, and an air hose 22 is connected to the second nozzle 8 through an air reservoir 20 and a hole 21.
is connected. The direction of the second nozzle 8 is the same as that of the first nozzle 4.
The orientation should be the same as that of the .

After flowing into the air reservoir 20, the compressed air supplied from the bowse 22 is ejected from the second nozzle 8 into the yarn passage 19, producing a high-speed swirling airflow.

The first nozzle 4 ejects a swirling airflow at approximately 2) 60,000 rpm to substantially rotate the fiber bundle at approximately 200,000 rpm, the spindle 5 rotates the fiber bundle at approximately 100,000 rpm, and the second nozzle No. 8 jets out a swirling airflow of about 3 million rpm to give the fiber bundle a substantial rotation of about 300,000 rpm. As a result, the first nozzle 4 sucks the fiber bundle, opens the fiber bundle,
Untwisting by rotating the fiber bundle is performed in the spindle 5, untwisting by rotating the fiber bundle in the second nozzle 8, and false twisting in the second nozzle 8. For example, the first nozzle 4, the spindle 5, the second
If the rotation direction of the nozzle 8 is the Z direction (counterclockwise),
The first nozzle 4 transmits an S twist corresponding to the rotation of the yarn at 200,000 rpm to the downstream side.

Then, ■00 converted to the rotation of the thread by the spindle 5
The second nozzle 8 rotates the yarn at 300,000 rpm in the direction of untwisting the S-twist, and the S-twist is
It is returned to its original state and becomes zero. Therefore, from the second nozzle 8 onwards,
A uniform Z twist will remain.

23 is a balloon controller 1 to a roller for narrowing the diameter of the thread passage 19 and controlling the balloon of the thread, and 24 is a cap on the exit side of the casing.

Next, the yarn manufacturing process using this spinning device will be explained.

The fiber bundle drafted by the drafting device and sent out from the front roller 1 is drawn into the device by the air flow sucked from the gap between the member support 6 and the nozzle block 3. Prior to sending out the fiber bundle from the front roller l, the tip of the suction pipe (not shown) is brought into contact with the outlet of the cap 24, and the spindle 5
An inward suction air flow is created. Therefore, the fiber bundle entering the gap I4 is smoothly drawn into the spindle 5 by this air flow.

The yarn that has passed through the spindle 5 and been sucked into the suction pipe is introduced into the splicing device by the movement of the thread pipe, and spliced with the yarn on the package side that has also been introduced by the suction mouth.

The circumferential speed of the delivery roller provided on the downstream side of the exit of the cap 24 is set slightly higher than the circumferential speed of the front roller 1, so that tension is constantly applied to the fiber bundle passing through this device during spinning. I try to make it hang.

The fiber bundle is guided into the inlet 5a of the spindle 5 by the action of the airflow ejected from the first nozzle 4, and is subjected to the action of the compressed airflow swirling in the vicinity of the spindle population 5a,
It is slightly twisted in the same direction. At this time, the presence of the guide member 7 makes it impossible for the fiber bundle to be located within the space occupied by the guide member 7. All the fibers will therefore be located around the guide member 7, directly exposed to the air flow and separated from all around the entire circumference,
The fibers located inside are also exposed to the air flow and are subjected to forces that separate them from the fiber bundle. However, when the tip of the fiber is at the inlet 5a position of the spindle 5, 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 1 or are located far from the first nozzle 4 and are not affected by air much. The rear end of the fiber leaves the front roller 1 and comes to a position where it receives a strong air flow from the first nozzle 4, and is separated from the fiber bundle for the first time. The separated rear ends of the fibers are wound around the inlet 5a of the spindle 5 one or more times by the action of the air flow, and then slightly wound around the conical part 5b of the spindle 5 and extended outward.

Furthermore, the fiber bundle continues to run downstream, and on the other hand, since the spindle 5 is rotating, the trailing end of the fiber is gradually drawn out while turning around the fiber bundle, and the fiber is spirally shaped around the fiber bundle. The fiber bundle passes through the fiber bundle passage 15 as a spun yarn.

At this time, the twist transmitted downstream by the first nozzle 4 is loosened by the rotation of the spindle 5 and the swirling airflow of the second nozzle 8 and becomes zero, leaving a uniform twist in the opposite direction.

As described above, according to the apparatus of this embodiment, the spindle 5
The false twist that is about to propagate from the front roller 1 side to the front roller 1 side is prevented from propagating by the guide member 7, and the fiber bundle leaving the front roller 1 is not twisted by the false twist, and most of the fibers are not twisted. It becomes a wrapped fiber. This can be confirmed by the fact that when the guide member 7 is not installed, a striped portion in the running direction is generated near the center of the flat fiber bundle fed out from the front roller 1 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 wrapped fibers and comparable in appearance and strength to ring yarn.

Furthermore, since a second nozzle is provided downstream of the spindle to apply a swirling airflow that rotates in the same direction, uniform twisting can be applied efficiently.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a spinning device of the present invention, and FIG. 2 is a schematic plan view illustrating the relationship between a spindle and its driving device. 3----nozzle block, 4-first nozzle, 5----
-Spindle, 5a=-Spindle inlet, 6-Guide member support, 7-Guide member, 8-Second nozzle representative Patent attorney Moto Yasushi Fujii

Claims (1)

[Claims] 1. A nozzle block having a first nozzle that applies a swirling airflow to the fiber bundle exiting the drafting device, a spindle that rotates in the same direction as the swirling airflow, and a guide member that protrudes with its tip toward the inlet of the nozzle block. A spinning device comprising a guide member support fixed within a nozzle block, and a second nozzle provided downstream of a spindle to apply a swirling airflow in the same direction as the swirling airflow.