JPH03241017A - Fine spinning frame - Google Patents

Abstract

PURPOSE:To obtain a fine spinning frame giving a strong real-twist yarn at a high speed by providing a guide member having a tip end opened close to the inlet part of a non-rotating yarn-guide tube, placing the guide member in a block for opening a drafted fiber bundle with a jet of gyrating air stream and placing a gyrating air stream blasting twist nozzle in a yarn guide tube path. CONSTITUTION:A fiber bundle S is supplied through a sliver-feeding guide 14 and drafted with a drafting apparatus D consisting of a back roller 15, a middle roller pair 17 having an apron 18 and a front roller pair 19. The drafted bundle is introduced into a fine spinning frame A. The frame A contains a guide member 6 in a fiber- opening nozzle block 1 having a fiber-opening nozzle 4 blasting a gyrating air stream and has a twist nozzle 5 blasting a gyrating air stream in the path 7 of the yarn guide tube 2. The guide member 6 has its tip end opened near the inlet part 2a of the non-rotating yarn guide tube 2. The yarn is exposed to the gyrating air stream near the inlet part 2a of the yarn guide tube 2 to effect false-twisting and the separated fiber is wound around the fiber bundle S by the rotation of the yarn caused by the gyrating air stream blasted from the twisting nozzle 5 to obtain the objective real-twist yarn Y.

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 traft device and heating it. This relates to a device for

[Conventional technology]

Conventional spinning machines can be broadly classified into three types: ring type, oven end type, and air type.

Among these, pneumatic spinning machines have been developed in recent years, and are capable of spinning at several times the speed of ring-type spinning machines. This pneumatic spinning machine is equipped with two air injection nozzles following a draft device (for example, the Japanese Patent Publication No. 53-4
(See Publication No. 5422). Each of these nozzles applies a compressed air flow swirling in opposite directions to the fibers exiting the draft device, and the fiber bundle is false-twisted by the second nozzle, and the false-twisted fiber bundle is transferred to the first nozzle. The fibers are ballooned by a nozzle, some of the fibers are wound around other fibers by the balloon, and the fiber bundle is further passed through a second nozzle and untwisted to be tightly wound to produce a spun yarn.

Since this pneumatic spinning machine produces yarn using a false twisting and untwisting method, it has the disadvantage that the texture of the yarn produced is inevitably hard and poor. Furthermore, with this device, it is difficult to stabilize the behavior of the fibers when winding them, so there is a limit to how much yarn quality can be improved, and because it uses two nozzles, it consumes a lot of compressed air, which reduces energy costs. The problem is that it's big.

Furthermore, there are some difficulties in the ability to spin relatively long fibers such as wool.

In order to deal with this problem, the following spinning machine has been proposed (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 traft 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 spinning machine disclosed in JP-A No. 63-85123 has the property that other fibers are wound in a spiral shape around a silent or thinly twisted core fiber.
compared to ring yarn, where most of the fibers are twisted,
The appearance is different and the thread strength is also lower.

An object of the present invention is to provide an apparatus capable of producing yarn having the same characteristics as ring yarn using such a pneumatic spinning machine.

1. Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the spinning machine of the present invention is equipped with a fiber opening nozzle 4 that spouts swirling airflow to the fiber bundle S exiting the draft device (tD). A guide member 6 with its tip facing the inlet 2a of the non-rotating yarn guide tube 2 is installed in the fiber opening nozzle block 1 having a twisting nozzle 5 that spouts swirling airflow into the passage 7 of the yarn guide tube 2. It was established.

[For production]

In the spinning machine configured as described above, the fiber bundle S exiting the traft device ifD is sucked into the opening nozzle block l, exposed to a swirling air current near the opening 2a of the yarn guide tube 2, and is slightly suspended. twisted. At this time, all the fibers of the fiber bundle S are located around the guide member 6, are directly exposed to the air flow, and are subjected to a force that separates them from the fiber bundle S.
The tips of the fibers located at the entrance 2a of the fibers are not easily separated because they are subjected to false twisting. The separated rear ends of the fibers are wound around the outer periphery of the thread guide tube 2 and extended outward by the action of the air flow. The fibers are gradually pulled out while swirling around the fiber bundle S due to the travel of the fiber bundle S and the rotation of the yarn by the swirling airflow from the twisting nozzle 5, and most of the fibers are wound in a spiral shape, resulting in actual twisting. It becomes a shaped spun yarn.

〔Example〕

An embodiment of a spinning machine of the present invention will be described with reference to the drawings.

As shown in FIG. 1, this spinning frame A has a draft device consisting of a pair of back rollers 15, a pair of middle rollers 17 having an apron 18, and a pair of front rollers 19, which are arranged following a sliver input guide 14! ! It is placed next to D. Note that the lines extending left and right in the figure are the travel paths of the fiber bundle S or yarn Y, and 16 is a sliver width regulating guide.

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

This spinning machine A generally consists of a fiber opening nozzle block 1 having a fiber spreading nozzle 4, a guide member support 3 having a guide member 6, and a yarn guide tube 2 having a twisting nozzle 5, which are installed in a machine frame. It is something that

A fiber bundle passage 7 is formed through the center of the fiber guide tube 2.
The center of this passage 7 coincides with the travel path of the fiber bundle S. Furthermore, four twisting nozzles 5 are formed in the yarn guide tube 2 and are oriented tangentially to the passage 7 through an air reservoir 12.
An air hose is connected to the air reservoir 12 through a hole. This swirling airflow from the twisting nozzle 5 causes the yarn Y in the passage 7 to
False twisting is applied to the fibers to promote winding of the trailing ends of the fibers, which will be described later. Instead of rotating the yarn Y with the swirling airflow in this way, it is conceivable to rotate the yarn guide tube 2 to rotate the yarn Y, but there is a limit to mechanically rotating the yarn guide tube 2. With swirling airflow, it is possible to achieve 300,000 revolutions per minute, which is 10 times faster than mechanical rotation. Therefore, it is possible to handle fairly high speed spinning.

Further, the distance between the population 2a of the fiber guide tube 2 and the nip point N of the front roller 19 is set to be shorter than the average length of the fibers constituting the fiber bundle S. The outer diameter of the inner diameter 2a of the yarn guide tube 2 is sufficiently small, and the portion following the inlet 2a is formed into a conical portion 2b whose outer diameter increases in the direction in which the yarn travels. The part of the conical pipe 2 that covers the conical part 2b is a small-diameter cylindrical hollow chamber 8, which is followed by a tangential air escape hole 9.
is formed. An air suction vibrator is connected to this air escape hole 9.

The front of this hollow chamber 8 is formed into a cylindrical hollow chamber 10 having a diameter slightly larger than the diameter of the tip of the fiber guide tube 2 by the opening nozzle block l.

The opening nozzle block l is formed with four opening nozzles 4 that are directed from the air reservoir 11 toward the entrance 2a of the fiber guide tube 2 and tangentially to the hollow chamber 10. An air hose is connected to 11 through a hole. The orientation of the fiber opening nozzle 4 is set according to the twisting direction of the yarn to be manufactured.

The compressed air supplied from the hose flows into the air reservoir 1.1, and then is ejected from the opening nozzle 4 into the hollow chamber 10, producing a high-speed swirling air flow in the vicinity of the fiber guide tube 2a.

After swirling inside the hollow chamber 8, this airflow is guided toward the escape hole 9 and discharged. At the same time, this air flow generates a suction air flow that flows into the device from the nip point N of the front rollers 19.

Further, a guide member support 3 is fixed to the inner wall of the opening nozzle lock 1. The guide member support 3 has a cylindrical shape with one end protruding conically, and the - side is cut out to form a gap between it and the fiber opening nozzle lock 1, and the gap is used as a guide for the fiber bundle S. It is designated as passage 13. In addition, a hole is formed in the longitudinal direction of the guide member support 3 and corresponds to the center line of the passage 7 of the thread guide tube 2, and a bottle-shaped guide member 6 is inserted into the hole. In addition to this, the guide member 6 may have a shape obtained by cutting a pipe in half in the vertical direction. The guide member 6 protrudes from the hole of the guide member support 3 and has a free end facing the entrance 2a of the thread guide tube 2. According to this method of installing the guide member 6, the entrance side of the apparatus is not blocked by the guide member 6, so that the entrance of the fiber bundle S is not obstructed.

The guide member 6 has a diameter smaller than the diameter of the passage 2a of the thread guide tube 2, and has a smoothly curved tip.

In FIG. 2, the tip of the guide member 6
Although the case is shown in which it is located a little into the inside of the passage 7 from a, it is also possible to take a position away from the end face of the inlet 2a, and it can be set at an appropriate position according to each condition.

The guide member 6 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 using only the wrapped fibers.

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

The front roller 19 is drafted by the draft device ID.
The fiber bundle S sent out from the front roller 19 is drawn into the guide passage 13 by the air flow sucked into the hollow chamber 10, but before the fiber bundle S is sent out from the front roller 19, a suction pipe (not shown) The tip is the thread guide tube 2
is brought into contact with the end side of the passageway 7, and an air flow is generated that is sucked into the thread guide tube 2. Therefore, due to this air flow, the guide passage 1
The fiber bundle S entering the fiber bundle S is smoothly sucked into the fiber guide tube 2.

The yarn suctioned into the suction pipe through the yarn guide tube 2 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 circumferential speed of the delivery roller provided on the downstream side of the end of the passage 7 of the yarn guide tube 2 is set to be slightly higher than the circumferential speed of the front roller 19, and the fiber bundle S passing through this device during spinning is set to be slightly higher than the circumferential speed of the front roller 19.
I try to maintain tension at all times.

The fiber bundle S is subjected to the action of the swirling compressed air flow near the entrance 2a of the yarn guide tube 2, and is slightly twisted in the same direction. At this time, the presence of the guide member 6 makes it impossible for the fiber bundle S to be located within the space occupied by the guide member 6. All the fibers will therefore be located around the guide member 6, directly exposed to the air flow and subjected to forces that separate them from the fiber bundle S. However, when the tip of the fiber is at the entrance 2a of the fiber tube 2, the tip is not easily separated because it is false twisted as described above. Further, the rear ends of the fibers have not been separated yet because they are nibbed by the front roller 19 or located far from the opening nozzle 4 and are not much affected by air.

When the rear end of the fiber leaves the front roller 19 and comes to a position where it is strongly exposed to the air flow from the opening nozzle 4, the fiber is separated from the fiber bundle S.

At this time, the tips of the fibers are partially false-twisted, and because they are inserted into the thread guide tube 2 where the action of air is small, they do not separate, and the rear ends of the fibers are hardly subjected to the false-twisting action. only is separated from the fiber bundle S. The separated rear end of the fiber wraps around the artificial part 2a of the thread tube 2 once or multiple times under the action of the air flow, and then wraps around the conical section 2b of the thread tube 2 a little and extends outward.

The fiber bundle S continues to run to the left in the figure, and on the other hand, a swirling airflow is blown out from the twisting nozzle 5 into the passage 7 of the yarn guide tube 2, and the yarn is rotating, so that the fiber bundle S continues to travel to the left in the figure. It is gradually drawn out while circling around 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 7.

In the manufacturing process of this yarn Y, the fibers are separated from all over the entire outer periphery of the fiber bundle S, and the fibers located inside are also exposed to the air flow and separated, so that the fibers are further separated from the outer periphery of the guide member 6. Since the fibers are located at These separated fibers are evenly distributed in the conical part 2b of the thread pipe 2, and there are almost no core fibers, and most of the fibers are twisted and wound, resulting in a real twisted shape. It becomes a thread. The winding direction of these wound fibers is determined by the directions of the opening nozzle 4 and the twisting nozzle 5. The swirling directions of these air flows are preferably set in the same direction so as not to disturb the winding direction of the wound fibers and to prevent the ends of the fibers from separating.

As described above, according to the apparatus of this embodiment, the false twist that is about to propagate from the yarn guide tube 2 to the front roller 19 side is prevented from propagating by the guide member 6, and the fiber bundle S leaving the front roller 19 is prevented from propagating by the guide member 6. The fibers are not twisted during false twisting, and most of the fibers become wrapped fibers. This can be confirmed by the fact that when the guide member 6 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 19 in the roller width direction.

It is most preferable that the distal end of the guide member 6 extends a little into the passage of the thread guide tube 2. The yarn produced under this condition has an appearance closest to that of a ring yarn, but it is also possible to manufacture a yarn having an appearance similar to a ring yarn under other conditions. These yarns are comparable in strength to ring yarns.

C. 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.

In addition, since the rotation of the yarn for winding the fibers separated by the opening nozzle is done by the swirling airflow of the twisting nozzle, it is possible to rotate at a speed 10 times faster than when using mechanical rotation. can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of a spinning apparatus to which the spinning machine of the present invention is applied, and FIG. 2 is a sectional view of the spinning machine of the present invention.

Claims (1)

[Claims] 1. A guide member 6 whose tip faces the inlet 2a of the non-rotating fiber guide tube 2 is placed in the opening nozzle block 1 having the opening nozzle 4 that jets a swirling airflow to the fiber bundle S exiting the drafting device D. The spinning machine is equipped with a twisting nozzle 5 for ejecting swirling airflow into the passage 7 of the yarn guide tube 2.