JPH052619Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention [Industrial application field] This invention creates a spun yarn by twisting the untwisted staple fiber bundle drafted by a drafting device by applying swirling airflow. The invention relates to a device for manufacturing.

[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.

[The problem that the idea aims to solve]

The yarn produced by the above-mentioned conventional spinning equipment has a structure in which other fibers are spirally wound around a non-twisted or slightly twisted core fiber, and most of the fibers are twisted. Compared to ring threads, it has a different appearance and is less strong.

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

B. Structure of the invention [Means for solving the problem] In order to achieve the above object, the spinning device of this invention has a cylindrical part at one end in the nozzle block that applies a swirling airflow to the fiber bundle exiting the drafting device. A guide member support is fixedly installed, and a guide member is provided protruding from the cylindrical part with its tip facing the center of the entrance of a rotating or stationary spindle, and the diameter of the cylindrical part and the length of the guide member are set so that the diameter of the cylindrical part and the length of the guide member are equal to that of the guide member. 1.5 each
-10 times, 2-20 times.

[Effect]

In the spinning device configured as above,
The fiber bundle exiting the draft device and sucked into the nozzle block is guided into the spindle inlet, exposed to swirling airflow near the spindle inlet, and slightly 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 the spindle and extends outward due to the action of the airflow, and as the fiber bundle travels,
It is gradually pulled out while rotating around the fiber bundle,
Most of the fibers are wound in a spiral, creating a real twisted yarn.

〔Example〕

An embodiment of the spinning device of this 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 26, a pair of middle rollers 28 having an apron 29, and a pair of front rollers 20, which are arranged following a sliver input guide 25. It is located. 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.

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

Reference numeral 1 denotes 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 is composed of a pair of front and rear split molds, which are screwed together.

A spindle 6 is rotatably supported inside the bearing 2 via bearings 4 and 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 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, and the portion following the inlet 6a 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 11 near the inlet 6a of the spindle 6, and a conical hollow chamber that opens at a large angle in the part continuing from this hollow chamber 11. It is set at 12.

The area in front of the small-diameter hollow chamber 11 is formed into a cylindrical shape with a diameter slightly larger than the tip diameter of the spindle 6 by a nozzle block 23, and the cylindrical portion serves as a guide passage for the fiber bundle S. . In front of the conical hollow chamber 12, an annular hollow chamber 14 and an air escape hole 15 in the tangential direction following the annular hollow chamber 14 are formed. An air suction pipe is connected to this air escape hole 15.

Inside the casing 3, there is a nozzle block 23.
A hollow air reservoir 16 is formed between the two. The nozzle block 23 is formed with four air injection nozzles 17 that are oriented from the air reservoir 16 toward the inlet 6a of the spindle 6 and tangentially to the hollow chamber 11. An air hose 19 is connected via 18. The direction of the nozzle 17 is set to be the same as the rotational direction of the spindle 6, and its ejection pressure is about 4 kg/cm ² .

The compressed air supplied from the hose 19 flows into the air reservoir 16 and then is ejected from the nozzle 17 into the hollow chamber 11, creating a high-speed swirling airflow near the spindle inlet 6a.

After this airflow swirls inside the hollow chamber 11,
It diffuses outward while rotating gently within the conical hollow chamber 12, is guided toward the relief hole 15, and is discharged. At the same time, this air flow is transferred to the front roller 20
A suction air flow is generated that flows into the hollow part of the casing 3 from the nip point N of the casing.

Furthermore, a guide member support 13 is fixed to the inner wall of the nozzle block 23. The guide member support 13 has a cylindrical shape with a thin cylindrical portion 13a protruding from one end, and one side thereof is cut out to form a gap 24 between it and the nozzle block 23, and the fiber bundle S
It is a guide passage.

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

The guide member 22 protrudes from the pore of the guide member support 13 and has a free end facing the inlet 6a of the spindle 6.

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.

Now, with reference to FIG. 3, the size relationship between the guide member 22 and the guide member support 13 will be examined.

The length l ₁ of the guide member 22 is preferably 4 to 10 mm. If it is shorter than this, the fibers will not wrap around the guide member 22 despite the swirling airflow from the nozzle 17, resulting in yarn breakage or
The appearance of the yarn surface deteriorates. Furthermore, if the length is longer than this, the yarn produced will be a bundled spun yarn, which is not preferable.

Diameter d ₁ of guide member 22 and guide member support 1
There must be a step difference of 0.5 mm or more between the diameter d ₂ of the cylindrical portion 13 a and the diameter d 2 of the cylindrical portion 13 a. Since the distance from the point N to the tip of the guide member 22 is substantially shortened, the yarn produced becomes a bound spun yarn or a so-called loose yarn with low strength.

Further, the guide member 22 has a diameter d ₁ of 0.5 to 2.0 mm.
The guide member support 13 is often one in which the diameter _d2 of the cylindrical portion 13a is 2 to 4 mm, and a real twisted yarn can be produced within this range.

From the above, if d ₂ = αd ₁ and l ₁ = βd ₁ , then
It is necessary to set α to 1.5 to 10 and β to 2 to 20. That is, it is necessary that the diameter d ₂ of the cylindrical portion 13a and the length l ₁ of the guide member 22 be 1.5 to 10 times and 2 to 20 times the diameter d ₁ of the guide member 22, respectively.

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 also possible to take a position away from the end face of the inlet 6a, 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 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 a cap.

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

The fiber bundle S drafted by the drafting device D and sent out from the front roller 20 passes through the gap 2 between the guide member support 13 and the nozzle block 23.
Before the fiber bundle S is sent out from the front roller 20, the tip of a 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 apparatus by the air flow sucked from the front roller 20. A suction air flow into the 6 is created. Therefore, the fiber bundle S entering the gap 24 is smoothly drawn into the spindle 6 by this air flow.

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 is also mixed with the yarn on the package cage side, which is also introduced by the suction mouth. The threads are spliced.

The peripheral speed of the delivery roller provided on the downstream side of the outlet 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 provided on the downstream side of the exit 30 of the cap 21 is set to be slightly higher than the peripheral speed of the front roller 20. , so that tension is applied at all times.

The fiber bundle S is guided into the inlet 6a of the spindle 6 by the action of the jet air flow from the nozzle 17,
In the vicinity of the spindle inlet 6a, it is subjected to the action of a swirling compressed air flow, and is slightly twisted in the same direction. At this time, the presence of the guide member 22 makes it impossible for the fiber bundle S to be located within the space occupied by the guide member 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 periphery, and the fibers located inside will also be exposed to the air flow and will form a fiber bundle. Receives the force of separation from S. However, the tip of the fiber is at the inlet 6 of the spindle 6.
When in position a, the tip is not easily separated because it is subjected to false twisting as described above. Also,
The rear end of the fiber has not been separated yet because it is nipped by the front roller 20 or is located far from the nozzle 17 and is 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 20 and comes to a position where it receives a strong air flow from the nozzle 17. The separated rear ends of the fibers are wrapped around the inlet 6a of the spindle 6 once or multiple times by the action of the airflow, and then wrapped around the conical part 6b of the spindle 6 a little, and then guided to the rotating body 9. Extends outward.

Furthermore, the fiber bundle S continues to travel downward in FIG.
On the other hand, since the spindle 6 is rotating, the rear 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 10.

The direction in which the wound fibers are wound is determined by the direction of the nozzle 17 and the direction of rotation of the spindle 6. The swirling direction of the airflow by the nozzle 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 false twist that is about to propagate from the spindle 6 to the front roller 20 side is prevented from propagating by the guide member 22, and the fiber bundle S leaving the front roller 20 is prevented from propagating by the guide member 22.
There is no twisting caused by false twisting,
Most of the fibers are 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 appears near the center of the roller width of the flat fiber bundle sent out from the front roller 20.

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 Depending on the conditions, it is also possible to apply the present invention to a spinning device using a nip type twister or a one-nozzle type spinning device. Further, the spindle 6 assists in twisting the yarn, and some yarns can be manufactured even if the spindle 6 does not rotate.
Therefore, the spindle 6 does not necessarily need to rotate.

C. Effects of the invention Since this invention is configured as explained above, it 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.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of a spinning device to which the device of this invention is applied, Fig. 2 is a sectional view of the device of this invention, and Fig. 3 is a sectional view of a guide member support and a guide member of the device. It is. 6...Spindle, 6a...Spindle inlet,
DESCRIPTION OF SYMBOLS 13... Guide member support body, 13a... Cylindrical part of guide member support body, 17... Nozzle, 22... Guide member, 23... Nozzle block, D... Draft device, S... Fiber bundle.

Claims (1)

[Scope of utility model registration request] A guide member support having a cylindrical portion at one end is fixed in a nozzle block that applies swirling airflow to the fiber bundle exiting the drafting device, and the guide member is guided from the cylindrical portion toward the center of the inlet of a rotating or stationary spindle. The diameter of the cylindrical part and the length of the guide member are each 1.5 to 10 times the diameter of the guide member.
A spinning device that has been multiplied by 2 to 20 times.