JPS58136840A - Production of spun yarn - Google Patents

Abstract

PURPOSE:A bundle of staple fibers are passed through two different vortex flow nozzles which cause vortex flows in reverse directions to each other to make a spun yarn with high yarn strength and good appearance, because of its less fluffs. CONSTITUTION:A bundle of staple fibers that has been drafted into a prescribed thickness is passed through two vortex nozzles N1 and N2 in which the directions of the vortex flows are reverse to each other. The number of balloon rotation of the yarn caused by the first nozzle N1 is represented by n1 and that by the second nozzle N2 by n2 and the air pressure is set so that n1 is small than n2. The yarn separated from the staple fiber bundle is made to winding around the fiber bundle positively between the front rollers and the first nozzle N1 to give the spun yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing spun yarn. In the history of spinning methods, ring spinning has been the mainstream since its appearance.

In recent years, innovative technologies such as oven-end spinning, false twist spinning, and bundled spinning have been developed to dramatically increase spinning speed compared to ring spinning.

In the yarn obtained by the above ring spinning method, most of the individual fibers constituting the yarn are in a parallel state, and the entire yarn is rotated from one side to create a real twisted yarn, which is generally a single yarn called a single yarn. It has a structure. In addition, the thread is drawn into a balloon of a certain size by the high-speed rotation of the traveler, and due to the centrifugal force depending on the balloon diameter and rotation speed, both ends of the fiber are heated in a state that protrudes everywhere. Fuzz is generated, and the fuzz is further exacerbated by the traveler's first wiping.

In addition, the rotor-type open-end spinning method is representative of the open-end spinning method, and this method twists the fibers that are being deposited in a state approximately parallel to the inner peripheral wall of a rotating rotor. , which heats the fibers while sprinkling them. Therefore, the core fibers are heated strongly, and the fibers on the outer surface are not twisted all the way to the inside, making them loosely twisted, like ring-spun yarn. It is impossible for the fibers to be heated together in a parallel state.

Therefore, the last sprinkled fibers are called bridge fibers or wrap fibers that simply wrap around the outside of the yarn, and these fibers are not arranged in the twist direction of the yarn.
They get tangled with the yarn, causing not only the appearance of the yarn to deteriorate, but also a decrease in strength and fluff.

Furthermore, the false twist spinning method or the binding spinning method was disclosed in Japanese Patent Application Laid-open No. 56-7.
9728, Japanese Patent Publication No. 52-48256, etc.

In other words, 80 to 90% of the main fibers constitute the main part of the yarn as fiber bundles in which the fibers are parallel to each other, and by wrapping a very small number of fibers around the outside and tightening the parallel fiber bundles, the yarn becomes strong. If you simply wrap staple fibers around a substantially untwisted parallel fiber bundle, it will inevitably be weak in terms of yarn strength, especially in the case of long fibers, but short fibers. The purpose of the present invention, which involves winding staple fibers with both ends unrestrained, is to overcome the drawbacks of the various spinning methods mentioned above. The present invention provides a method for producing a spun yarn.

That is, it is a pneumatic spinning method in which a spun yarn is obtained by applying one fluid vortex nozzle and a second fluid vortex nozzle to a staple fiber bundle drafted to a prescribed thickness, the second fluid vortex The fibers separated from the stable fiber bundle are actively wound around the heated fiber bundle on the heating side of the nozzle and between the front roller and the first fluid swirl nozzle to be spun.

In Fig. 1, the staple fiber bundle (S) is conveyed by a back roller (1), a middle roller (2), a front o--p (
8) After being drafted to a specified thickness by a drafting device consisting of Introduced SrL, 1 nol, hyphae (Yl
Then, while being pulled out by the pull-out roller (4), it is wound up by a winding device (not shown).
In each of the nozzles (Nl) and (N2), fluid jet ports are bored so as to generate swirling fluid flows in mutually opposite directions, and all gases can be used as the fluid. However, compressed air, which is easy to use, is sufficient.

In Fig. 2, there is an error point (Q) of the front roller (8).
The oni nozzle (Nl) is placed in the 0 side area σ) between I and the second nozzle (N2). is formed, and a rotating tube (7) is provided between the front roller (3) and the oni nozzle (N1).

The above rotation fee (7) is the inlet throttle part (1st nozzle QJI)
5) is rotatably supported via a bearing (8) on the outer periphery of the tube (7) in the same direction as the turning direction of the thread by the oni nozzle. The rotation of the sounding shaft (11) is transmitted and rotated.

The axis of rotation of the rotating light (7) is aligned with the center 1144 of the inner hole (12) of the first nozzle (N1) on the same straight line as the urine, and the axis of rotation of the rotating light (7) is aligned with the center of the inner hole (12) of the first nozzle (N1). This does not impede the propagation and also does not prevent the generation of the oni-order balloon (B2) between the front roller (3) and the oni-nozzle (Nl), which is generated by the oni-order balloon (Bl) caused by the oni-nozzle (Nl).

The rotational speed of the rotating tube (7) is set to an appropriate speed depending on the quality of the yarn to be spun or the yarn running speed, but it is necessary that the rotating tube (7) does not stand still, and that it rotates at least a little. 2 is enough.

IIJ The rotating tube ('7) is used to dramatically wind the fiber group (B2) cut from the false twist of the fiber bundle (Sl) around the heated fiber group in the center. This will be explained in FIG. 3, which shows step-by-step the process of forming yarn in such a spinning device d.

That is, in Fig. 31, (S) is the front loaf (8).
17) From the nip point fQ), the oni nozzle (A//), the second
The arrow (B) indicates the direction of the draft of the staple fiber bundle supplied to the nozzle (Nl), and the arrow (A) indicates the direction of rotation of the light beam 7 due to the swirling flow of the oni nozzle (Nl).
N2)... is the turning direction of the loop 7, and the yarn turning direction of the oni nozzle (N1) and the second nozzle CN2) is opposite, and (4) is the pull-out roller.

Figure /1'3 (Without running the LIU yarn, the second nozzle Q (
2) Indicates the state in which false twist is generated only by
i1″ (S twist) occurs in the yarn in the IJII twisting side region, and Z twisting occurs in the light in the untwisting side region (tJ).

(1)) shows a state where the yarn is running and a temporary twisting sound is generated at the second nozzle (N2). In this case, the S twist generated on the heating side (T) passes through the second nozzle (N2). The threads are untwisted and twisted one after another.

Originally, the untwisting side should be untwisted, but in the pneumatic false twisting device like the above example, all 7 points are used to generate false twist, so the second and first points of twisting are Therefore, the S twist on the Karo twisting side has moved to the untwisting side.

(C) is (b) 17) Oninozzle CNI)k in state d
A part (S2) of the fiber bundle (S) is sent out from the front roller (3) by the action of the nozzle (N1) with 41 people placed between the front roller (3) and the second nozzle ψ2).
is cut from (, ls+inhibition), and is turned into an ending.

Continuing from (C), (d) shows the state of the separated fiber (S2) on the twisted side, that is, the cut fiber (S2) is placed on the heated fiber bundle (Sl). It is wound in the direction opposite to the direction of false twist (842) (Z-rubbing), resulting in a tight state.

(e) shows the state of the fiber (S2) wound by (dl) when the false twist is untwisted 1lllllll (U), and the fiber (S2) is twisted into two twists in the opposite direction to the S twist of the false twist.
When it enters the untwisting side region, it is further twisted by 2 due to the untwisting action.
0 twist in the direction.

(fl) Therefore, the yarn (Y) that has passed through the pull-out roller (4) becomes a spun yarn with the actual twist of the Z twist to the south, and is transferred to the winding device d.

In the method of the present invention, the steps (c) to (f) described above are performed in (C) →
(d)→(e)→edge) to produce a yarn.In step (d) of the above yarn forming stage, a part of the stranded fiber (2) is separated from the false twist. S is heated fiber (81) and thread...
In addition, in Akira Kimoto, a rotating tube (7) is arranged between the front roller (3) and the first nozzle (Nl), and the rotating tube (7) is wrapped around the oni nozzle ψl.
) is actively rotated in the same direction as the balloon direction of the thread, so that the fiber (S) bundle or C) cut-off fiber 032) is actively wrapped around the As a result, the formed spun yarn has two twists.
A smooth thread can be obtained with a strong, large, and less fluffy yarn.

& (d) CPI in (e)) 0″2) C Indicates the winding pitch of the winding fiber J (S2) at each position,
Pi>P2.

Furthermore, if the amount of fibers torn off from the false twist is too small, sufficient strength may not be obtained; on the other hand, if it is too large, thread breakage will occur, so it is necessary to control the amount to an appropriate amount.

In this example, by controlling the air pressure of the first nozzle and the second nozzle and adjusting the number of rotations of the yarn balloon,
You can produce a wide variety of craftsmanship.

Balloon rotation of the thread by the oni nozzle φ1).

If the number is nl and the number of rotations of the yarn balloon by the second nozzle 0J2 is N2, air pressure is set so that nl<N2, so 4).

As mentioned above, the front roller (3) and the 71 nozzle (N
The separated fibers are wrapped around the MAI bundle (ε゛1) which has been sent out from the front roller (3) between 1N and 1N and has undergone false twisting. The rear end ml (821) gets stuck in the false twisted fiber bundle.

Therefore, cut off; rL l, and the first rule for the tip of the fiber is 3.2
The winding direction, that is, in the case of the above embodiment, is the same on both sides due to the receiving a/returning action that has passed through the nostle (N2), and the rear end becomes untwisted, and is not cut or oiled. Sa I
They are mixed in the fiber bundle (81) that was not used, resulting in four yarns as shown in Figure 5.

1Z1 The spun yarn tYl obtained in this way has directionality, and when rubbed in the direction of arrow (c), the wrapped fibers (S2) form a neck shape. In addition, the binding force decreases, and the bare thread becomes shaped and there is a risk of pro-eutectoid 7L.When rubbed in the direction of the arrow Φ), it is extremely strong, several times stronger than the ring thread, and the outer appearance of the thread has fewer neps. .

As described above, in the present invention, the fibers separated from the staple fiber bundle are actively wound around the Kano fiber bundle between the front roller and the roller fluid vortex nozzle for spinning, thereby increasing yarn strength. Moreover, it is possible to obtain a smooth spun yarn with less fuzz when viewed from the outside.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a pneumatic spinning device; Fig. 2 is an enlarged cross-sectional view of essential parts of a spinning device embodying the present invention; and Fig. 8 illustrates the process of forming spun yarn produced by the method of the present invention. FIG. 4 is a schematic diagram showing the winding state of separated fibers, and FIG. 5 is a schematic diagram showing the structure of the manufactured yarn. (8)...Front roller (7)...Rotating sound (Nl)...Ol fluid swirl nozzle (g) 2y...Second fluid swirl nozzle (S)...Stagel fiber bundle (81)...υ mouthpiece fiber bundle

Claims (1)

[Claims] A spinning method for obtaining a spun yarn by applying an O driftwood vortex nozzle and a second fluid vortex nozzle that generates a fluid flow in a direction opposite to the fluid swirling direction of the O fluid vortex nozzle to a staple fiber bundle, On the heating side of the second fluid vortex nozzle, and between the front roller and the first fluid vortex nozzle, the fibers separated from the false twist on the east side of the staple fibers are actively wound around the θ0 twisted fiber bundle and spun. A method for producing a spun yarn, which is characterized by producing a spun yarn.