JPH03161525A - Apparatus for producing spun yarn - Google Patents

Abstract

PURPOSE:To obtain really twisted yarn in which wrapped fiber extending nearly the whole area of yarn is present by providing the inside or outsides of a flowing fiber bundle between front rollers of drafting part and a twisting part with a fiber bundle guide member. CONSTITUTION:The inside or outside of a flowing fiber bundle (S) between front rollers 20 of a drafting part (D) and a twisting part is provided with a fiber bundle guide member 22 to afford really twisted yarn with a high content of wrapped fiber. False twist tending to propagate from the twisting part (spindle 6) to the side of the front rollers 20 is prevented from propagating with the guide member 22. Thereby, most of the fiber becomes wrapped fiber without twisting in the fiber bundle emerging from the front rollers 20 by false twisting.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for producing spun yarn, and more specifically, for producing spun yarn by twisting untwisted short fiber bundles drafted by a drafting device. Relating to a device for

[Conventional technology]

Conventional spinning machines are broadly classified into three types: ring type, open-end type, and pneumatic type.

Among these, pneumatic spinning machines have been developed in recent years, and are capable of spinning at speeds several times faster than ring-type spinning machines13. In the device of this publication, two air injection nozzles are arranged following the draft device, and each nozzle
Compressed air flows swirling in opposite directions are applied to the ITO. The fiber bundle is false twisted by the second nozzle and the false twisted wI vertebral bundle is ballooned by the first nozzle. This balloon wraps some fibers onto other fibers, and the fibers pass through the second nozzle and are untwisted to be tightly wrapped, thus making a single yarn. The thread is spun.

[Problem to be solved by the invention]

A detailed examination of the yarn obtained by the above-mentioned conventional air two-mesh spinning machine reveals that it is a bundled spinning system in which other fibers are spirally wound around non-twisted or lightly twisted core fibers. The quantitative ratio of the core fiber to the wrapped lIm, the manner in which the fibers are wound, etc. can be changed to some extent by variously changing the spinning conditions, and the physical properties of the yarn such as yarn strength can also be changed accordingly. Although it is possible to change the behavior of the wound fibers, it is difficult to stabilize the behavior of the wound fibers with this pneumatic spinning machine when the fiber length becomes long because the fibers are wound with an unstable balloon. Additionally, since this spinning machine uses two nozzles, it consumes a lot of compressed air, resulting in high energy costs.Additionally, there is a problem in that it has considerable difficulty in spinning long fibers such as wool. there were. The present invention has focused on these circumstances and aims to solve the above-mentioned problems by providing a new spinning device to replace the conventional pneumatic spinning machine described above.

[Means to solve the problem]

According to the present invention, a fiber bundle guide member is provided inside or outside the flow of the fiber bundle that exits the draft part and is supplied to the twisting part.

〔Example〕

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

The detailed structure of the above-mentioned spinning device (A) is shown in FIG.
It shows the driving route of Y).

(1) is a support plate fixed to the frame, and this plate (l) has a hollow cylindrical bearing (2
) is fixed, and furthermore, a spindle and a casing {3} of a rotating disk, which will be described later, are fixed by screws or the like. The caning (3) is made up of a pair of split molds at the front and back, and is secured with screws.

A spindle (6) is rotatably supported inside the bearing (2) via bearings (4) and (5). A hollow boule (7) is inserted into the outer periphery of the spindle (6).

(8) is an endless drive belt that is suspended along the unit so as to be in contact with the outer periphery of the boley (7) and is driven to run by a motor (not shown). 7), the spindle (6) rotates at high speed. A rotating body (9) is integrally formed in front of the bearing (5) of the spindle (6).

A fiber bundle passage (lO) is formed through the center of the spindle (6), and the present spinning device (A) has a fiber bundle passage (lO) that extends through the center of the fiber bundle passage (10) and the center of each hollow part of the casing (3). (S
) and arranged so that the distance between the spindle population (6a) and the front roller nip point (N) is shorter than the average length of the fibers constituting the fiber bundle (S). The population part (6a) of the spindle (6)
The outer diameter of the casing (3) is sufficiently small, and the outer diameter of the portion following the inlet (6a) is shaped like a cone (6b) increasing toward the rotating body (9). )
The part that covers the spindle (6) and rotating body (9) is
The vicinity of the inlet (6a) of the spindle (6) is formed into a small-diameter cylindrical hollow chamber (11), and the part continuing from this hollow chamber <11> is a conical hollow chamber (12) opened at a large angle. It has been done.

In addition, the area in front of the small-diameter hollow chamber (11) has a cylindrical shape with a diameter slightly larger than the tip diameter of the spindle (6), and the cylindrical portion is formed into a guide passage (13) of the m-Ito (S). ). An annular hollow chamber (l4) and a tangential air escape hole (15) continuous with the hollow chamber (14) are formed on the outer periphery of the conical hollow chamber (12).

An air suction pipe is connected to the air escape hole (15).

A hollow air chamber (16) is formed inside the casing (3), and extends from the air chamber (16) toward the inlet (6a) of the spindle. ) are formed (Figs. 1 and 3) with four air injection nozzles (17) oriented tangentially to the air chamber (
16) is connected to an air hose (19) through a hole (18). The direction of the nozzle (17) is the spindle (6).
) is set to be the same as the rotation direction.

The compressed air supplied from the hose (19) flows into the air chamber (16) and then blows out from the nozzle (17) into the hollow chamber (11), causing the spindle population (6a>
generates a high-speed swirling airflow near the

After this airflow swirls inside the hollow chamber (11), it expands outward while gently swirling inside the aforementioned conical hollow chamber (12), and is guided toward the escape hole (15> direction and discharged). At the same time, the air flow generates a suction air flow flowing from the nib point (N) of the front roller (20) into the hollow portion of the casing (3).

(21) is a cap fitted to the rear end of the bearing 2).

Furthermore, in FIGS. 1 and 3, the guide member (2
2) is fixedly installed with one end fixed to the artificial wall (23) and the other end left free. In other words, the guide member (22) is provided between the draft parser (23) in FIG. 1 and the twisting part (spindle (6) in this embodiment).

Note that the guide member (22) is shown as a twenty-one dollar figure in the embodiments of FIGS. 1 and 3.

That is, the twenty-one dollar (22) is a pin-shaped item having a diameter smaller than the passage diameter of the entrance (6a) of the spindle (6), and the tip (22a) is shaped with a smooth curve, and at least In the vicinity of the spindle, the center line of the 21 dollar has a portion (22 b ) substantially parallel to the running direction of the fiber bundle.

Furthermore, the tip i (22a) of the above-mentioned twenty-one dollar (22) is shown at a position slightly inside the passage {10} from the population of the spindle (6), but it is at the same position as the inlet end face (6a). Alternatively, it is possible to take a position away from the inlet end face (6a), and it is set at an appropriate position according to various conditions.

In Figure 3, the fiber bundle population (24) and the spindle (6)
Since the aisles (IO) of
2) is bent in the middle for installation, but the entrance (24
) is installed eccentrically above or below the passageway (10), it is possible to install the straight line (22) by fixing it to the wall (23).

Further, the shape of the guide member {22} is not limited to a twenty-one dollar shape, and may be a conical shape, a rocket shape with a cylindrical body with a tapered tip, or other shapes.

The function of the guide member (22) is mainly to prevent the propagation of twist in the process of forming the yarn, which will be described later, or to temporarily replace the central core fiber bundle. The purpose is to prevent the core fiber bundle from being twisted and to actually shape the yarn using only the wound fibers.

In Figure 1, <25) is a sliver feeding guide, <26) is a back roller pair, (27) is a sliver width regulating guide, (28) is a middle roller pair, and (29) is an apron. It embodies (D).

Next, the yarn manufacturing process using the textile machine described above will be explained.

It is drafted by the draft device (D), and the front roller (
#a Weito (S) sent out from the cylindrical part (guide passage> (13)) is drawn into the guide passage (13) by the suction air flow that acts toward the front passage. Prior to sending out the wi fiber bundle (S) from the front roller (20), the tip of the suction nozzle (not shown) comes into contact with the outlet (30) of the cap (21). ), and the fiber bundle (S) entering the guide passage (l3) toward the back is smoothly drawn into the spindle (6) by the suction air flow at the inlet of the spindle (6). It gets sucked in.

The needle thread (which has passed through the spindle {6} and has already become a yarn) that has been sucked into the suction pipe through the spindle (6) is introduced into the yarn splicing device by the rotation of the suction pipe. , is spliced with the bobbin thread on the package side which is also introduced by the suction mouth.

Further, the circumferential speed of the delivery roller on the downstream side of the outlet (30) is set slightly higher than the circumferential speed of the front roller (20). The spinning process is performed under constant tension.

Next, this spinning outfit II! The spinning process in (A) will be explained.

That is, as shown in FIG. 2, the fiber bundle (S) is affected by the compressed air flow that is ejected from the air injection nozzle (17) near the spindle (6) and swirls around the outer periphery of the spindle (6). It will be slightly twisted in the direction. At this time, the guide member (22) makes it impossible for M Weidong to be located in the space occupied by the guide member (22).
Therefore, all the fibers are located around the guide member (22) and are directly exposed to the air flow and are subjected to force to separate from the SaW bundle (S), but the tips of the fibers (S) are attached to the spindle. When the tip is in the position of population (6〉), the tip is not easily separated because it has been subjected to the above-mentioned false twisting, and
The rear end of the i-fiber is attached to the front roller (20〉) as shown in the second figure.
It is not separated yet because it is nipped by the nozzle (17) or is located far from the nozzle (17) and is not affected by the air flow much.

Subsequently, when the rear end (fla) of the fiber (fl) separates from the front roller (20) and approaches the air injection nozzle (17), it is strongly affected by the force of the air flow from the nozzle (17) and the fibers are separated. Separate from the east (S). At this time, the fiber (f1
) is partially false-twisted, and since it is inserted into the spindle with little airflow, it does not separate, and only the trailing end (fla) of the fiber, which is hardly subjected to false-twisting, becomes a fiber bundle (S). ). The separated rear end of the fiber is brought into the inlet of the spindle (6) once or yI by the action of air flow.
It is wound several times, then wrapped around the conical part (6b) a little, and then guided by the rotating body (9) and extended outward.

Next, the fiber bundle (S) continues to run to the left and the spindle (6) rotates, so that the rear end (fl) of the fiber (f1)
a) is gradually pulled out while circling around Iso Ito (S).

As a result, the above fiber (f1) is! The fiber bundle (S) is wound spirally around the a weito (S) and becomes a bundled spun yarn (Y) and passes through the m weito passageway (10).

In the process of lining the yarn (Y) described above, the fiber (f1) is separated from the entire outer periphery of the fiber bundle (S), and the fiber (fl)
When the m-fibers are separated, the m-fibers located inside are exposed to the air flow and are further separated.Furthermore, since the fibers are present on the outer periphery of the guide member (20), a large number of fibers are continuously separated. Ru. These separated fibers are evenly distributed around the outer periphery of the spindle (6) and the conical shape B (6b), and most of the fibers are twisted and wound with almost no core fibers, resulting in a real twisted shape. It becomes the thread of

The winding direction of these wound Ia fibers (fl) is the spindle (
It is determined by the direction of rotation of the spindle <<6>>, and when the spindle <<6>> rotates in a certain direction, it winds in the Z-twist direction, and when it rotates in the opposite direction, it winds in the S-twist direction. The swirling direction of the air flow from the air injection nozzle (17) does not disturb the winding direction of the above-mentioned wrapped fiber (f1), and the spindle (6 ) is preferably set in the same direction as the rotation direction.

As described above, according to the device of this embodiment, the false twist that attempts to propagate from the twisting part (spindle (6)) to the front roller (20> side) is prevented from propagating by the guide member <22>. The fiber bundle leaving the front roller (20) is not twisted by false twisting, and most of the fibers become wound fibers.

This means that when the guide member (22) is not installed,
This can be confirmed by the fact that the fibers are twisted near the center in the roller width direction of the flat fiber bundle coming out of the front roller (20) due to the propagated false twist, and a streak-like part is created in the running direction of the fiber bundle. .

Figures 4, 6, and 8 show the appearance of the spun yarn produced by the apparatus of this embodiment.

The spinning conditions were as follows: The fiber used was 26 gelens of cotton, the total draft of the draft part was 82, and the spindle (6
) rotation speed 6080Orpm, injection air pressure from nozzle (l7) 4 kg/cat ~ 6 kg/c
at, the spun yarn was Ne24, and the yarn speed was 106. 5n+
/min.

The spun yarn (Y1) in Figure 4 was obtained when the twenty-one dollar (22) was introduced a certain distance (a) into the passage (10) of the spindle (6), and the appearance is that the entire area of the yarn is It is a ring-like spun yarn with actual twisting of Ill fibers wound over the entire length, and there are almost no untwisted core fibers inside. That is, the m-wound vertebrae exist almost continuously along the length of the thread, the winding angle is uniform, and there is little unevenness in the thickness of the thread.

The spun yarn <Y2> in Figure 6 is 21 dollars (as shown in Figure 7).
This was obtained when the tip of 22) was aligned with the artificial end surface of the spindle (6), and in this case also, a real twisted yarn was obtained in which the wrapped fibers were present at a uniform angle over almost the entire area.

The spun yarn (Y3) in Figure 8 is worth 21 dollars (Y3) as shown in Figure 9.
22) was obtained by separating the tip of the spindle (6) by a slight distance (b) from the inlet end face of the spindle (6).
As shown in Figure 6, a real twisted yarn was obtained in which wrapped fibers were present over almost the entire area of the yarn.

In addition, in the above three examples, the spun yarn (Y1> in Fig. 4 has an appearance closest to a ring yarn, and the 21 dollar (22) is in the position shown in Fig. 5, that is, in the passage of the spindle (6). It is good if there is a slight intrusion into the 21 dollar (22)
Although the position in the direction perpendicular to the fiber running direction is on the center line of the pipe-like passageway (10) in the example, a slight deviation in the radial direction is within the permissible range. just,
When the fibers around the twenty-one dollars flow into the spindle,
It costs 21 dollars (
22) is preferably on the center line of the passageway <10).

On the other hand, Fig. 10 is a diagram to clearly show the characteristics of the spun yarns in Figs. 4, 6, and 8 above, in which only the 21 dollar (20) is deleted and the other conditions are the same as the above yarns. The obtained spun yarn (Y4) is shown. Obviously, in this case the wrapped fiber (Y4
a) is not present over the whole area of the yarn, but only exists partially, and the core fiber I! is non-twisted or lightly twisted. (Y4b) is present in large quantities. That is, the core fiber (Y4b) is wrapped around the core fiber (Y4b).
It has a structure in which al fibers (Y4a) are spirally wound, and is particularly characterized in that the wound fibers are arranged at approximately equal pitches along the length of the yarn.

Next, experimental results regarding the strength characteristics of the spun yarn obtained using the apparatus of this example will be shown. Figures 12 to 15 are each
It is an SS diagram in which elongation is plotted on the horizontal axis and strength is plotted on the vertical axis. Figure 12 shows the spun yarn obtained by the present invention (Figure 4 (
7) Yarn (Yl) S-] Figure 1 shows characteristics very similar to the SS diagram of the ring yarn obtained with the ring spinning machine shown in Figure 13. Regarding the strength value, ring thread 1
It showed a strength of 11.3g/TEX, which was close to 90% compared to 3g/TεX.

Figure 14 is an S-S diagram of the spun yarn (Y4) shown in Figure 10, where the strength temporarily decreases during tension (e)
occurs. It is presumed that this is caused by misalignment of the fibers at the so-called partially weak winding strength points.

FIG. 15 shows an SS diagram of the spun yarn obtained with the two-nozzle device shown in Japanese Patent Publication No. 53-45422, which was shown above, and there are also places where the strength is partially reduced. It is estimated that some of the fibers have shifted or slipped.

As described above, the apparatus of this embodiment produces a real twisted yarn that exhibits ring yarn-like characteristics in terms of appearance and strength characteristics, and in which the wound fibers are continuously present over almost the entire length of the yarn.

In the above-mentioned embodiment, a case where the twisting section is applied to a four-spindle-type spinning device has been described in detail, but the present invention can also be applied to devices for obtaining other bundled spun yarns. For example, it is possible to provide a 21-dollar-shaped guide member to the first nozzle of the two-nozzle type described in the above-mentioned publication, or a spinning device using a nozzle and a nip-type twister, or a one-nozzle type spinning device, etc. It may also be possible to apply it depending on the conditions.

〔Effect of the invention〕

As described above, in the present invention, since the fiber bundle guide member is provided inside or outside the flow of the fiber bundle between the front roller of the draft part and the twisting part, real twisted yarn with a large amount of wrapped fibers is can be manufactured.

[Brief explanation of the drawing]

FIG. 1 is a schematic structural diagram showing an embodiment of a spinning device to which the present invention is applied, FIG. 2 is a schematic diagram showing a spinning state by the same device,
Fig. 3 is an enlarged detailed view of the spinning section of the device, and Figs. 4 to 9 are views showing the external appearance of the spun yarn obtained by the device and the positional relationship between the guide member (22) and the spindle (6). in,
Figures 4, 6, and 8 are external views of the spinning system, and Figures 5, 7, and 9 are guide members (2
2) and the spindle (6), Figures 10 and 11 show the appearance of the spun yarn when the guide member (22) is removed, and the appearance of the spindle (with the guide member (22) removed). 6) and FIGS. 12 to 15 are SS diagrams showing the relationship between elongation and strength of various spun yarns. (6> Spindle (22) Guide member (D) Draft part (S)/fiber bundle (Y1) to (Y4) Spinning system

Claims (1)

[Scope of Claims] A spun yarn manufacturing apparatus characterized in that a fiber bundle guide member is provided inside or outside the flow of fiber bundles that exit a draft part and are supplied to a twisting part.