JPH0345736A - Device for producing slub yarn - Google Patents

Abstract

PURPOSE:To readily change the size, length, etc., of a slub by feeding a bundle of sheath fibers into an air jet processing machine through a tension-imparting device for repeating the slow increase of the tension and the instantaneous cancellation of the tension therein. CONSTITUTION:A bundle 1 of core fibers is fed into an air jet processing machine 3 through a feed roller 4, while a bundle 2 of sheath fibers is fed into the air jet processing machine 3 through a feed roller 5 and a tension- imparting device 9. The tension-imparting device 9 has fiber guides 10 and 11 formed in a shaking arm 22 and a hooking guide 12, and the shaking arm 22 is shaken with a driving device 23 to transfer the bending position of the yarn from a yarn passageway.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a textured yarn obtained by blowing pressurized air onto a multifilament yarn to be treated, in which a sheath yarn is entangled with a core yarn to form a slab. The present invention relates to an apparatus for manufacturing a slub yarn having a slub yarn.

[Conventional technology]

It is known to produce textured yarns by imparting fine crimps to synthetic fiber filament yarns primarily by physical means and fixing the crimps on the yarns by heat treatment.

One of them is Air Jet Texture Art Yarn. In the same system, when the yarn passes through the air injection nozzle, high-pressure jets are ejected onto the yarn, and the filaments in the yarn bundle that are blown with the compressed air are disorganized, causing small loops and slack. , a feeling of excitement arises.

It is thought that slub yarn can be produced by irregularly producing the above-mentioned crimps, and the yarn bundle tension can be varied by bringing the yarn bundle into contact with the guide cam surface before being introduced into the air injection nozzle and swinging it left and right. A device has been developed that changes the effect of the pressure injected in the air injection nozzle on the yarn bundle, causing unevenness in the occurrence of crimp. The yarn bundle guide cam is limited by the spacing between each yarn path and cannot increase its swing width, and the shapes of the cam surfaces at both the left and right ends of the yarn bundle guide cam are symmetrical. Therefore, the variation curve of the tension applied to the thread is symmetrical. Therefore, when the tension changes, the tension that is gradually applied will be gradually relaxed. Therefore, the shape of the crimp, that is, the interval between slabs, size, etc., cannot be easily changed.

[Problem to be solved by the invention]

In view of the above-mentioned points, the present invention provides a slab-type manufacturing device that has a large slab crimp and can easily change the spacing, size, etc. of slabs when manufacturing slab yarn using an air jet processing machine. The purpose is to obtain.

[Means to solve the problem]

The device of the present invention introduces the yarn bundle that will become the sheath yarn into the air jet processing machine when guiding the yarn bundle that will become the core yarn and the yarn bundle that will become the sheath yarn to the air jet processing machine through separate yarn guide paths. right before,
a yarn guide provided with a tensioning device that repeatedly applies a slow increase in tension and an instantaneous release of tension to the yarn bundle, the tensioning device giving a bending position to the yarn bundle from the yarn bus;
The hook for hooking the yarn bundle between the yarn guides is composed of a guide, and the yarn guide is movable and connected to a drive device in a slub yarn manufacturing device.

〔Example〕

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

FIG. 1 is a schematic side view of an embodiment of the present invention, showing one unit, in the longitudinal direction of the machine (perpendicular to the plane of the drawing).
Multiple units are installed in rows. In the illustrated example, the yarn bundle (1) serving as a core and the yarn bundle (2) serving as a sheath are sent one by one to the air jet processing machine (3). ) and (2) may be changed to appropriate numbers.

In principle, the air jet processing machine (3) has a nozzle (6) as shown in FIG.
), and the compressed air from the compressed air jet pipe (8) is sent to the thread conduit (7).
) in the yarn bundles (1) and (2>) to cause swelling and twisting in some of the yarns constituting the yarn bundles (1) and (2>), Baffle boards etc. (19
By spraying the yarn bundles (1) and (2) on the yarn bundles (1) and (2), a crimp is generated and the yarns are entangled around the two yarns, or a loop is generated. In addition, if necessary, a water conduit (not shown) is provided in the air injection processing machine (3), and a yarn bundle that generates crimp is brought into contact with a part of the water flow at the tip of the conduit to impart moisture. . Addition of moisture effectively contributes to the occurrence of crimp.

The core yarn bundle (1) is sent to the air jet processing machine (3) via a feed roller (4) of a known shape, and the sheath yarn bundle (2) is
It is sent to the air injection processing machine (3) via the feed roller (5), and the feed roller (5) and the air injection processing machine (3)
The tension applying device (9) intermittently applies tension fluctuations between the two.

The tension applying device (9) is constructed as follows.

Yarn guides (10) (11) provide an entrance side bending position and an exit side bending position of the yarn along the yarn bath of the sheath yarn bundle (2).
) and a hook guide (12〉) that exerts an action and a pull-out action on the thread between the thread guides.A thread guide (
1(]) (11) is fixed on a swinging arm (22) that swings around a support shaft (21) in this example,
A drive device (23) to which the swinging arm <22> is connected
The bending position of the yarn from the yarn bath moves as the yarn is swung by the yarn bath (as shown by solid lines and chain lines).

The drive device (23) is connected to the other arm (24) of the swing arm (22).
) a rotating cam plate (26) connected to the link (25);
It consists of a drive motor (28) as a drive source directly connected to the shaft (27) of the cam plate (26). (29) is a cam follower, and (31) is a spring that always biases the swing arm (22) in the clockwise direction.

The driving device (23) may be replaced with a fluid cylinder or a solenoid, or a servo motor or the like may be used to cause the floating arm (22) to perform complex movements.

Note that the thread guide (lO) (11) on the swing arm (22)
) can change its fixing position in the length direction of the arm (22), and the thread guide (10) (1
1) If the spacing is widened, the length of the thread that can be drawn out by the guide (12) will increase and a large or long slab will be obtained; if the spacing is narrowed, the length of the thread that can be drawn out will be reduced and a small or short slab will be obtained.

The means by which the hook allows the guide (12) to move forward and backward as described above will be described below, but the means are not limited thereto.

The hook is provided with a guide (12) at the tip of the swinging arm (13),
A swinging arm (13) is swingably supported on a shaft (14).One end of the swinging arm (13) is attached to a foil (■7) provided on the motor shaft of a motor (16) by a connecting rod (15). The swing angle of the swing arm (13) is adjusted by changing the fulcrum positions of the foil (17) and the connecting rod (15). It is bent in a shape, and when it reaches the furthest point between guides (10) and (11),
The sheath thread bundle (2) running between the guides (10) and (11) is locked to the bent part of the dogleg, and is pulled out as the floating arm swings, and as the swing angle increases, Sheath thread bundle (2
), the angle of the dogleg bend changes so that the thread that is locked will come off naturally. (18) is a feed roller that guides the thread that has been processed.
0% overfeed.

Now, in the above device, the core yarn bundle (1) and the sheath yarn bundle (2) are pulled out from the +J-ru (not shown), and the core yarn bundle (1)
) passes through the feed roller (4), and the sheath yarn bundle (2) passes through the feed roller (5) and tension imparting device (9), respectively, and both yarns are sent to the yarn conduit (7) of the air jet processing machine (j). bundle(
1) and (2) are sent aligned. At this time, among the yarns making up both yarn bundles that are blown with compressed air from the compressed air jetting tube (8>), the yarns that are strongly exposed to the compressed air are bowed out of the yarn bundle, producing a loop-shaped crimp.However, As mentioned above, the yarn bundle to which water has been applied in the air injection processing machine (3), that is, the sheath yarn bundle, has good separation between the yarns and crimps occur frequently. , air injection processing machine (
Before entering 3>, intermittent tension application is performed by the tension application device (3). That is, as the motor (16) rotates, the swing arm (13) pulled by the link rod (15) repeatedly swings back and forth. At this time, the hook at the tip of the floating arm is attached to the guide (1
2), in Fig. 1, when swinging to the right, the sheath thread bundle (
2) is engaged and pulled in, and at a position close to the swinging limit of the swinging arm (13), when the direction of the dogleg-shaped bent part of the guide (12) changes, the thread naturally catches the guide ( 12
), and at that moment the sheath yarn bundle (2) is untensioned and enters the yarn conduit (7) of the nozzle (6) in a relaxed state.

Here, the sheath yarn bundle that has been blown with pressurized air in a relaxed state is swollen with gaps between the yarns constituting the yarn bundle, and is then passed through the nozzle ( under constant tension). When the core yarn bundle (1) passes through the yarn conduit (7) of 6) and leaves the yarn conduit, a baffle plate or the like (19 A large slab is produced when the yarn bundle collides with the guide (I
The distance of the guide (12) can be changed by changing the distance between the OC (11) and the mounting position of the connecting rod (15〉). By changing the number of movements as appropriate, by changing the shape of the cam plate (26), by changing the rotation speed of the motor (28), etc., and by combining these, you can obtain a slub yarn with a wide variety of variations. be able to.

FIG. 3 shows a schematic diagram of the yarn obtained by this device.

The sheath thread (2) covers the core thread (1), and the length of the slab (SL) (S2) (S3) (Ll) (
L2) (L3) and size (Hl) (112
> ()13) are variously different.

In other words, the moment the thread bundle leaves the guide (12), the sheath thread (2) relaxes and forms a slab, so if the thread guides (10) and (11) move to the main and sub sides in Figure 1, The more the yarn is loosened, the longer the yarn becomes, resulting in a slab (S2) (S
3) Long and large ones such as
In addition, if the reciprocating speed of the guide (12) is fast for the hook, the interval between the slabs becomes small, and the size of each slab tends to become large.

Further, the motors (16) and (28) are equipped with a rotation control device (3) including an inverter and a microcomputer.
2) and vary the rotational speed of the two motors (16) and (28) according to a predetermined program,
It is also possible to relax the sheath thread (2) with more complex timing and length.

Furthermore, in the above embodiment, the guides (10) and (11) are fixed on the swing arm (22), and the hook is attached to the guide (10).
2), but in other embodiments, the guides (10) and (11) may be fixed on an arm that moves in parallel, or the guides (10) and (11) may be moved independently. You may do as follows.

〔Effect of the invention〕

As described above, according to the manufacturing apparatus of the present invention, the size, length, etc. of the slab can be varied extremely, and high-quality slab yarn can be easily obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a slub yarn manufacturing apparatus according to the present invention, FIG. 2 is a schematic sectional view of a nozzle, and FIG. 3 is a schematic diagram of the obtained slub yarn. (1) Core yarn, (2) Sheath yarn, (3) Air injection processing machine, (9) Tension imparting device, (10) (11) Yarn guide, (Work 2) - Hook is guide, (22> Swinging Arm, (23) Drive device.

Claims (1)

[Claims] When guiding a yarn bundle that will become a core yarn and a yarn bundle that will become a sheath yarn to an air jet processing machine through separate yarn guide paths, the yarn bundle that will become a sheath yarn is introduced into the air jet processing machine. A tensioning device is provided that repeatedly applies a slow increase in tension to the bundle and an instantaneous release of the tension, and the tensioning device provides a bending position of the yarn bundle from the yarn path, and a yarn guide between the yarn guides. 1. An apparatus for manufacturing slub yarn, comprising a hook guide for hooking a yarn, the yarn guide being movable and connected to a drive device.