JPH0376827A - Production of spun yarn - Google Patents

Abstract

PURPOSE:To readily obtain non-torque two ply yarns not causing problems of separation of single yarn in twisting process by heating two drafted slivers, respectively, spinning S twist single yarn and Z twist single yarn wherein each core yarn is wound with coiling yarn and doubling. CONSTITUTION:Two slivers S1 and S2 fed from plural cans are drafted by a drafting device 1, twisted by a twister 2 by air jet to give S twist single yarn Y1 and Z twist single yarn Y2 wherein core yarns are wound with coiling yarns. The spun yarns Y1 and Y2 are doubled and wound by a winder 3 to give spun yarn Y3 which is not readily separated wherein the spun yarn Y2 is entangled with the coiling yarn of the spun yarn Y1, the spun yarn Y1 is entangled with the coiling yarn of the spun yarn Y2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing spun yarn, and more particularly to a method for producing double yarn in innovative spinning, in which a sliver is directly processed into spun yarn.

[Conventional technology]

In the conventional plying and twisting process, a puff cage of yarn spun by a ring spinning machine and wound by an automatic winder is passed through a plying machine.
The twin yarns which were doubled by the yarn-twisting machine were further heated by a double twister. When producing single yarns using a ring spinning machine, one single yarn obtained using a doubling machine in this way can be manufactured as an S-twisted yarn, and the other single yarn can be manufactured as a Z-twisted yarn. No torque remains in the double yarn after doubling, and the fabric etc. woven using this double yarn becomes a good product without twisting or the like.

[Problem to be solved by the invention]

However, in order to obtain a non-torque twin yarn as described above, it is necessary to prepare two types of ring spinning machines: one with S and one with Z twist layer, and many of the ring spinning machines Since it is a Z-twisted layer, S requisition has disadvantages such as high unit price and the need to modify the spinning machine itself. In addition, the single yarn produced with a ring spinning machine is a real twisted yarn, and most of the fibers that make up the yarn are wound in the same direction, so even after doubling, the single yarns do not get entangled with each other. Since it depends only on the torque possessed, much cannot be obtained, and there is a problem that the single yarns easily separate from each other during the subsequent twisting process using a double twister or the like.

Therefore, the present invention aims to provide a method for easily obtaining the above-mentioned non-torque twin yarns, which does not cause problems such as separation of single yarns in the subsequent yarn twisting process. be.

[Means to solve the problem]

The method for producing a spun yarn according to the present invention involves generating wrapped m-fibers from two slivers that have undergone a drafting process, and winding the wrapped fibers of one sliver in the S-twist direction, and wrapping the wrapped fibers of the other sliver in the S-twist direction. The fibers are wound in two twist directions and then merged to form a double yarn.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a spinning device for obtaining a spun yarn according to the present invention, and includes a dotting device (1) for drafting slivers St and Si supplied from a plurality of cans (not shown). and the sliver Sl drafted by the dotting device (1).

A heating device (2) using an air jet that heats S2 and disciplines the spun yarn Yll Y2, and the spun yarn Y.

It is comprised of a winding device (3) that joins Y2 and winds it up as the spun yarn Y of the present invention. The draft device (1) has a pair of back rollers (4) whose circumferential speeds are set higher in order.
a), (4b) Middle roller pair (5a), (
5b) and front roller pair (6a), (6b
) and middle roller pairs (5a) and (5b).
is equipped with apron bells) (7a) and (7b).

(8a), (8b) are roller pairs (4a), (4b) that back the sliver S, S2 supplied from the can.
These are the sura and iba guides placed in parallel to send the materials to. Also, (9) is the back roller pair (4a), (4b
) and the middle roller pair (5a), (5b), the slivers Sl, S2 inserted in parallel into the back roller pair (4a), (4b) are separated. and the separation guide (
9), there are guide blocks α13. Ql)
is provided to restrict the spread of the two rows of slivers S, S, separated by the separation guide (9) to the left and right.

Therefore, the two slivers Sl+ St separated at the separation guide (9) position are separated by the middle roller pair (5a),
(5b) position, front roller pair (6a), (
At position 6b), the air is drafted while maintaining two parallel rows, and introduced into the air injection nozzles (2) and (a3) of the heating device (2). The heating device (2) has an air injection nozzle (2) inside a housing fixed to the frame GO.

α are installed in parallel, each air injection nozzle○
, Q3 has the function of independently heating the supplied sliver Sll S2 and disciplining the spun yarn Yll Y2.

0Φ is a separation guide for preventing the confluence point of the spun yarns Y1 and Y2 from floating up and downstream along the yarn path by the guide member Q71, and the spun yarns Yll and Y2 that occur when the confluence point floats to the upstream side. Prevents unevenness in the amount of entanglement between comrades.

(to) is a cutter installed at position α of the guide member,
The cutter (to) is operated by a yarn defect detection signal from a slab catcher (a) which detects a yarn defect portion provided in the middle of the yarn path descending to the winding device (3) via the delivery roller (to).

(21) and (22) are suction ports for dust such as threads and fluff, respectively, and (23) and (24) are suction pipes for air, respectively.

(25) is a slack tube that sucks the yarn, h, spun from the air injection nozzle (2), α, and prevents yarn slack.

The winding device (3) is composed of a bobbin supported by a known cradle arm (26), a friction roller (27) and a traverse guide (28) that are in rotational contact with the bobbin (or package) and driven to rotate. There is.

However, the heating device (2) used in the present invention has two air nozzles (29), (30) each provided in series in a housing α fixed to the frame α0.
Hereinafter, the upstream side will be referred to as the first nozzle (29), and the downstream side will be referred to as the second nozzle (30). Two rows of α are provided in parallel, and each air injection nozzle 021
．． α has a function of independently heating the supplied slivers St, S2 and forming them into spun yarns Y, Y,.

Since the air injection nozzles ○ and α have the same mechanism except for the swirling direction of the generated air swirling flow, nozzle 0 will be explained below.

That is, as shown in FIG. 1, the first and second nozzles (
29), (30) are provided with a plurality of air injection holes (not shown) for injecting air tangentially into the passage of the sliver formed through its central axis, and the air injection The pores create airflows in the passageway that swirl in opposite directions in the directions of arrows A and B. (31) and (32) are the first nozzle (2), respectively.
9) is a compressed air supply pipe to the second nozzle (30).

The structure is similar for the air injection nozzles α, but the first nozzle (29) for the nozzle a□ generates a swirling air flow in the opposite direction of arrow A, and the second nozzle (30> generates a swirling air flow in the opposite direction of arrow 8). Air injection pores are provided so that a directional swirling air flow is generated.

That is, the air injection nozzle Q21αJ
Nozzle (29> (29) Second nozzle (30) (30
), only the opening directions of the air injection holes are mirror-symmetrically different, and in this example, nozzle 0 spins a Z-twisted single yarn, and nozzle 0 spins an S-twisted single yarn. It will be done.

Next, the thread manufacturing process using this embodiment apparatus will be explained. That is, the air injection nozzle side of the heating device.

A second nozzle (30
) The swirling air flow B of (30) and the opposite direction of 8 impart a false twist in that direction, and the false twist is caused by the front roller (
6a), (6h) propagates to the vicinity of the nip point.

The sliver S coming out from the front rollers (6a) and (6b) is focused by false twisting by this second nozzle (3(1) (30)), but the sliver S coming out from the front roller (6a)
, (6b) and the first nozzle (29) (29), the sliver S is removed by the first nozzle (29) (29).
is ballooned in the opposite direction to the false twisting, and by this balloon, the rear end is still held by the front rollers (6a) and (6b) and is in the fiber constituting the sliver, but the tip is free ( wrapped fiber) fl is produced. This fiber f.

are the front rollers (6a), (6b) and the first
The balloon in the opposite direction to the false twisting between the nozzles (29>) and the air flow A of the first nozzle (29>) and the core fiber bundle f in the opposite direction to the false twisting by the second nozzle (30), Then, this fiber f1 passes through the second nozzle (30〉) and in the process of untwisting the false twist, the core fiber f is wound in the opposite direction to the inserted false twist with a sufficient number of turns.
, the so-called bound spun yarn Y, (Z twist), Y
2 (S twist) is formed.

These two spun yarns Y, Y2 are delivered to the delivery roller α
Until the thread passes through the thread, the twisting torque still exists inside the thread, and the thread is in the process of forming the thread.While this twisting torque remains, the threads are aligned and merged by the guide member α, so that the threads are aligned and merged at the joining point. intertwined.

That is, since the oven-end fiber f wound around the core fiber f was originally a free fiber at one end, even after exiting the air injection nozzles ■ and α, one end became fluffy. There are some fibers that remain protruding, and these fibers f1 do not contribute to yarn formation, but turn around the yarn as the core fiber bundle f2 untwists during the twisting torque loss process of the core fiber bundle f. The spun yarns proceed downstream along the yarn path, and at the confluence point between the two guide members α, they become entangled with other spun yarns Yl and Y2, as shown in FIGS. 3 and 4.

The entanglement of the open-end fiber f promotes the release of the twisting torque remaining in the core fiber f2, and the remaining twisting torque released here further spreads the spun yarns y, , yz as shown in Fig. 3. As shown in the figure, they are intertwined with each other in the S-twist direction or the Z-twist direction. This spun yarn Y
,,Y, Since the entanglement of comrades is originally caused only by the untwisting force due to residual torque, the number of twists is small (
Approximately 50 to 100 times per meter of yarn length>, when the S twist part continues, the Z twist part is next due to the torque accumulated by the S twist.
A twisted portion is generated. In addition, in order to better express the characteristics of the tangles between single yarns shown in Figure 3, the number of faces is exaggerated in the yarn length direction, and in reality, as mentioned above, 1 m
The number of entanglements is small, about 50 to 100 times.

In addition, in the above embodiment device, each of the nozzles α (
29) With the air swirling direction of (30) as shown in the second figure, and the swirling direction of each nozzle (29) and (30) of nozzle 0 being in the opposite direction, S-twisted yarn is spun from nozzle (2), and nozzle αJ Even when Z-twisted yarn is spun from
A double yarn of a similar form is produced in a process similar to that described above.

Further, each of the nozzles (2) α first nozzles (29)
is for making the wrapped fiber f1 rawhide, so
Instead of this first nozzle (29), a wound fiber generating member may be used which causes the large number of fibers constituting the sliver to become denser and denser in the radial direction.In short, the generated wound fibers f are False twisting means (3
0>, the false twisting direction may be reversed on the left and right sides.

〔Effect of the invention〕

As described above, according to the present invention, non-torque twin yarns can be obtained very easily, and the single yarns of the obtained twin yarns are not easily separated due to entanglement with fluffy peripheral fibers, etc. Because of its properties, it has advantages such as a low incidence of yarn breakage in subsequent processes such as twisting.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of a spinning device for carrying out the method of the present invention, Fig. 2 is a perspective view showing the main part of the air injection nozzle of the heating device used, and Fig. 3 FIG. 4 is an enlarged model diagram within the dotted chain line circle in FIG. 3. Sll SR... Sliver Y,, Y,, Y, Spun yarn (1)
- Draft device (2) Heating device (12), (13) - Air injection nozzle (17)
Guide member (29>) First nozzle (30) - Second nozzle f, Wound fiber f2 Core fiber

Claims (1)

[Claims] Wound fibers are generated from two slivers that have undergone a drafting process, and the wound fibers of one sliver are wound in the S-twisting method, and the wound fibers of the other sliver are wound in the Z-twisting direction.
A method for producing a spun yarn, which is characterized in that the two are then merged to form a double yarn.