JPH0457929A - Spinning machine - Google Patents

Abstract

PURPOSE:To obtain an actual twist-like spun yarn similar to a ring yarn by specifying the distance from the tip of a guide member to the nip point of front rollers wherein the guide member is installed toward the inlet center of a spindle in a nozzle block on which turning air current acts. CONSTITUTION:Distance 1 from the tip 22a of a guide member provided in a nozzle block to a nip point N of front rollers 20 is kept to 0.5-1.2 times longer than the effective fiber length of a fiber constituting a fiber bundle S. Thereby most of the fiber is spirally wound to provide the actual twist-like spinning yarn.

Description

Detailed Description of the Invention A1 Objective of the Invention [Industrial Application Field] This invention produces spun yarn by applying swirling airflow to a non-twisted short fiber bundle drafted by a drafting device and heating it. [Prior Art] 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.

1. Structure of the Invention [Means for Solving the Problem] In order to achieve the above object, the spinning device of the present invention has a rotating or stationary spinning device in the nozzle block that applies a swirling airflow to the fiber bundle exiting the traft device. A guide member support having a guide member protruding with its tip directed toward the center of the entrance of the spindle is fixedly installed, and the distance from the nip point of the front roller to the tip of the guide member is equal to 0 of the effective fiber length of the fibers constituting the fiber bundle. 5 to 1.2 times.

[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 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 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.

As shown in FIG. 1, this spinning device A is located next to a draft bar D that is arranged following a sliver input guide 25 and is composed of a pair of back rollers 26, a pair of middle rollers 28 having an apron 29, and a pair of front rollers 20. 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 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
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.

8 is an endless drive belt that is suspended along the unit in contact with the outer periphery of the boot IJ 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 IO 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;
The portion following a is a conical portion 6b whose outer diameter increases toward the rotating body 9.

The part of the caning 3 that covers the spindle 6 and the rotating body 9 has a small diameter cylindrical hollow chamber 1 near 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.

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 end 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 is formed, followed by a tangential air escape hole 15.

An air suction vibrator is connected to this air escape hole 15.

Inside the casing 3, a hollow air reservoir 16 is formed between it and the nozzle block 23. Nozzle block 23
Four air injection nozzles 17 are formed in the air reservoir 16 toward the inlet 6 a of the spindle 6 and tangentially to the hollow chamber 11 . The air hose 19 is then connected. Nozzle 1
The direction of the pump 7 is set to be the same as the rotational direction of the spindle 6, and the ejection pressure is about 4 kg/ci.

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, producing a high-speed swirling air flow in the vicinity of the spindle port 6a.

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 generates a suction air flow that flows from the nip point N of the front roller 20 into the hollow part of the casing 3.

Furthermore, a guide member support 13 is fixed to the inner wall of the nozzle hook 23. A gap 24 is formed between the guide member supports and serves as a guide path for the fiber bundle S. By causing one end of the guide member support 13 to protrude in a conical shape in this way, the fibers of the fiber bundle S supplied from the gap are less likely to wind around, and even if they wind around, the amount of winding is extremely small and is easy to unravel.

Further, in the longitudinal direction of the guide member support 13, a pore is formed that coincides with the center line of the passage IO 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 a cap.

The distance from the nip point N of the front roller 20 to the guide member tip 22a, indicated by l in FIG. 3, is set to 0.5 to 1.2 times the effective fiber length of the fibers constituting the fiber bundle S.

According to experiments, when l is less than 0.5 times the effective fiber length, the finished yarn becomes a bound spun yarn, which is not preferable.

Conversely, if l is 1.2 times or more the effective fiber length, it becomes impossible to manufacture yarn. The effective fiber length of the fiber bundle used in this experiment was 28 .mu.m.

Note that the effective fiber length is determined as follows. That is, create a staple diagram of the fiber bundle (a distribution curve in which the constituent fibers are arranged uniformly in order of length) as shown in Figure 4, set 0Q = 1/20B in this diagram, and draw a parallel line from Q to the base line OC. , and the intersection with the curve is Po. From Po to baseline O
Drop a perpendicular line P'P to C, set 0K=1/40P, and draw a perpendicular line from K to base line OC to find '. TK=1/2
K, draw a parallel line from T to the base line OC, and draw a perpendicular line R' R from the intersection R° with the curve to the base line OC. 0L
= 1/40R, and when a perpendicular line is drawn from L to find Lo on the curve, LL' is the effective fiber length. The effective fiber length thus determined is longer than the average fiber length.

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 and sent out from the front roller 20 is drawn into the device by an air flow sucked from between #24 between the guide member support I3 and the nozzle 23. However, 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 an air flow sucked into the spindle 6 is generated. Therefore, due to this air flow, the fiber bundle S entering the gap 24
is smoothly sucked into the spindle 6.

The yarn suctioned 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 is also introduced by the suction mouth.

The peripheral speed of the delivery roller provided downstream of the outlet 30 of the cap 21 is set 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 the airflow ejected from the nozzle 17, and is slightly twisted in the same direction by the action of the compressed airflow swirling in the vicinity of the spindle 6a. 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 be separated from the fiber bundle S. receive the power to 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 end of the fiber is connected to the front roller 20.
It has not been separated yet because it is nipped by the nozzle 17 or is located far from the nozzle 17 and is not affected by air much. 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 F. The separated rear end of the fiber is placed in the input hole 6a of the spindle 6 by the action of the air flow.
After being wound around the conical part 6b of the spindle 6 a few times, 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 path IO.

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 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.

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.

[Brief explanation of drawings]

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 cross-sectional view of the device of the present invention, FIG. 3 is a cross-sectional view of the same device near the fiber bundle entrance, FIG. 4 is a staple diagram of the fibers constituting the fiber bundle. 6--Spindle, 6a--Spindle inlet, 13-
-1-guide member support, 17------- nozzle,
22--1--Guide member, 23--Nozzle block, D-11--Draft device, S--Fiber bundle agent
Patent Attorney Yasushi Moto FujiiFigure 3Figure 4

Claims (1)

[Claims] 1. A guide member support having a guide member protruding with its tip toward the center of the inlet of a rotating or stationary spindle is fixed in a nozzle block that applies a swirling airflow to the fiber bundle exiting the draft device, and a front roller A spinning device in which the distance from the nip point to the tip of the guide member is 0.5 to 1.2 times the effective fiber length of the fibers constituting the fiber bundle.