JPS6036492B2 - Manufacturing method of spun yarn style yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses continuous multifilament yarn as a component,
This invention relates to a method for producing a spun yarn with many irregularities in which a large number of loops protrude from the yarn body.

Up until now, as a method of producing spun yarn-like yarn by concentrating the multifilament yarn in a loop shape, the method involves tensioning and relaxing the winding striped yarn on the core yarn, which is being heated and progressing, to create an open twill. There are methods such as winding the yarn while twisting or winding other yarns in the twisting area in front of the heater during false twisting, but these methods have limitations on the yarns that can be used or Due to the insufficient entanglement of the material, various problems were caused in the workability of turning, knitting and weaving, and so on.

On the other hand, the present inventors previously proposed a method in which these problems could be solved by using a core yarn passing through a cylindrical chamber while being twisted by a fluid twisting element. A spun yarn in which the pseudo yarn is injected into the cylindrical chamber in the opposite direction to the rotation of the core yarn and at a speed at least three times the running speed of the core yarn, merges with the core yarn, and then entangled by the fluid twisting element. We have proposed a method for producing wind yarn, and have made it possible to manufacture spun yarn wind yarn that fully satisfies practical performance, including entanglement, yarn unevenness, and ease of handling in post-processes such as winding, knitting, and weaving. However, this method has the problem that the apparatus is somewhat complicated, and the yarn obtained is uniform, so that when it is made into a cloth, the appearance is monotonous and lacks variation.

Therefore, in developing a method for producing spun yarn-like yarn from continuous multifilament yarn, the present inventors conducted extensive studies to solve the above-mentioned drawbacks and arrived at the present invention. That is, in the present invention, the core thread is heated and run by a fluid twisting element, and the substantially untwisted continuous multifilament thread is drawn out at a speed of four times or more than the drawing speed of the core thread upstream of the fluid twisting element. After opening the filament by ejecting a fixed collision surface provided in the vicinity of the running of the core thread with a fluid at a speed of 13 tones or less, and causing the fiber to travel on a sliding surface following the collision surface and merge with the core thread, The present invention is characterized in that the fluid is introduced into the twisting element and untwisted and entangled. Next, the present invention will be explained in detail using the drawings. FIG. 1 is a perspective view showing an example of an apparatus for carrying out the present invention, in which a continuous multifilament yarn 2 unraveled from a suitable package 1 is fed by a feed roller 4 through a guide 3; Yarn passage 1 of ejector 5 into which high-speed fluid is introduced
6, and after merging with the high-speed fluid in the fluid passage 15 of the ejector 5, it is ejected together with the high-speed fluid, collides with the collision surface 6 in front, and is spread by the diffusing fluid, and is installed on the sliding surface 8. The fluid progresses while being squeezed inward during a specific diffusion by the fluid regulation guide 7, is pulled out from an appropriate package 9, passes through the guides 26 and 11, and passes through the core yarn introduction guide 19 and yarn exit guide 20 of the sliding surface 8. As the core yarn 10 runs while being heated by the twisting element, the core yarn 10 is rotated and wound around the outer periphery of the core yarn 10 one after another. Here, the continuous multifilament yarn may be one or more. Collision surface 6
is a flat surface, a curved surface, or a combination thereof, and is fixedly provided. The reason why it is fixed here is to open the twill and wrap it around the core thread as it is. Among the twisting elements, fluid twisting elements are used because, in addition to the twisting and scale twisting action, they also have the action of attaching the fiber ends to the core yarn in multiple ways. At this stage, the yarn 21 still has a loose surface loop of the continuous multifilament yarn 2 wound around the core yarn 1, but is subsequently guided to the fluid twisting element 12 and twisted and untwisted. Only when the actual twist in the twisting direction of the fluid twisting element 12 is applied by the action, the loop of the multifilament yarn 2 becomes a yarn 25 in which the core yarn 10 is also firmly fixed.

The yarn 25 is then pulled out by the draw-off roller 3 and wound up through the guide 27 into a package 28 which is surface-driven by the wind-up roller 4.

FIGS. 2 and 3 are a plan view and a front view, respectively, showing details of the continuous multifilament yarn feeding section. The continuous multifilament yarn 2 ejected from the fluid passage 15 of the ejector 5 together with the high-speed fluid is part of a cylinder whose central axis is approximately perpendicular to the extended line of the central axis in front of the fluid passage 15. The fluid collides with the collision surface 6, is refracted by the collision surface, and diffuses into a film.The fluid travels along the surface of the sliding surface 8 along with the discharge flow of the fluid, which is spread out in the form of a film, and travels while being burned. The core yarn 10 is wound in sequence around the outer periphery of the core yarn 10. Here, the important factors for opening the continuous multifilament yarn 2 are the distance d between the collision surface 6 and the fluid passage 15, the angle formed by the tangent at the intersection of the central axis extension of the fluid passage 15 and the collision surface 6, and Examples include the shape of the collision surface 6. In order to perform stable and good fiber opening, the distance d should be 0.5 to 10 degrees, and the angle peak should be 45 to 8 degrees, depending on the fluid velocity.
00 is preferable, and it is better for the collision surface 6 to have a curved shape than a planar shape.In particular, a cylinder with a radius of 5 to 5 ribs is divided into two parts parallel to its axis, and the axis is parallel to the traveling direction of the opening filament. It is preferable that the two parts are arranged at right angles to each other. Next, the sliding surface 8 has a distance L from the end of the collision surface 6 to the bottom of the collision surface 6 of 10 to 4 degrees, and its tip surrounds the core yarn 10 running almost perpendicularly across the sliding surface 8, and the open twill shield. It is preferable that the core yarn be curved so that the traveling filament is bent in the direction of the core yarn 10. The angle Q' formed by this curved part is 20 ~
40o is preferred. Further, it is preferable to provide a fluid discharge hole 18 as appropriate in the curved portion in order to smoothly discharge the fluid that has spread and progressed through the filament, and the opening area is preferably 10 to 40 mm. If the aperture area is less than 10, fluid discharge is insufficient, and the fluid reflected from the curved portion of the sliding surface 8 disturbs the running of the opened filament. Moreover, when the number of filaments exceeds 40, the filament is pressed against the curved part of the sliding surface 8, and the rotation of the core yarn is disturbed. therefore,
In either case, the opened filaments are not wound smoothly around the core yarn, resulting in poor entanglement and operational stability.

Next, the passage of the core yarn across the top of the sliding surface 8 is guided by the core yarn introduction guide 19 and the yarn outlet guide 20'.
It is better to place it so close that it lightly touches the top of the screen.

However, the winding of the continuous multifilament yarn 2 is stable,
This is because thread spots are reduced. On the other hand, if it is run several sides away from the sliding surface, the area where spread filaments can accumulate around the core yarn becomes wider, and the winding position of each filament tends to fluctuate, causing the filaments to concentrate in the interstices. is wrapped around the thread, producing a slab-like mottled thread. The position of the passage of the core yarn can be arbitrarily selected depending on the application, but if it is excessively lifted from the sliding surface, the winding variation of the multifilament yarn becomes large and the entanglement property is decreased, which is not preferable. Next, the diameter of the core yarn introduction guide 19 may be a size that allows the core yarn to pass through smoothly and also allows stable running. The yarn exit guide 2 must be large enough to prevent the yarn 21 with the continuous multifilament yarn 2 loosely wound around the core yarn 10 from being squeezed. Slightly more preferred among 2 to 4 willows. FIG. 4 shows an example of the fluid regulation guide 7, which is provided with fan-shaped vertical side walls that surround the fluid passage 15 from behind and extend to part of the collision surface 6 and sliding surface 8. It is something. The fluid regulation guide 7 is
This method regulates the diffusion direction of the ejected fluid within a certain range, suppresses filament opening, and stabilizes the running direction of the opened filaments, which has a great effect on weaving properties and stability. The side wall opening angle 8 (see Figure 3) is 20
-700 is preferable; if it is less than 200, the high-speed fluid will not be sufficiently diffused, making it difficult for the continuous multifilament yarn to twill. On the other hand, if it exceeds 700, the fluid regulating effect of the fluid regulating guide 7 will be reduced, and both are not preferred. next,
As described in detail above, in the present invention, it is necessary to guide the yarn pulled out from the yarn exit guide on the sliding surface to the fluid combustion element to give it twisting and untwisting effects. The fluid twisting element used for this purpose may be an ordinary one that exerts a turning force on the running yarn using a high-speed fluid, but one example of the fluid twisting element suitably used in the present invention is Shown in FIGS. 5 and 6. Here, a fluid introduction hole 23 is provided in the side wall surface of the yarn passage 22 in a tangential direction. Also, this thread passage 2
2 is connected to a yarn path narrowing section 24 that stabilizes the running of the yarn and acts as a twisting and untwisting point. The fluid introduced by the fluid twisting element 12 applies a turning force to the yarn, entangles the multifilament yarn, and then is discharged through the yarn passage 22. The direction in which this fluid is discharged is not particularly limited, but it is preferable to discharge the fluid mainly against the running direction of the yarn, as this will improve the entanglement of the multifilament yarn and reduce the size of loops protruding around the yarn. 29 is the front introduction pipe;
Three rivers are annular fluid passages.

Next, FIG. 7 shows an example of an ejector 5 that ejects the multifilament yarn 2 together with a high-speed fluid onto the collision surface 6.

The fluid is introduced through the fluid introduction hole 17, merges with the multifilament yarn 2 guided through the yarn path 16 at the fluid path 15, and is ejected. There are no particular limitations on the ejector 5 as long as it can suction and transfer the continuous multifilament yarn along with the flow of the fluid. The fluid used in the ejector 5 and the fluid twisting element 12 is:
Although high pressure air is preferably used in both cases, other harmless and inert fluids such as nitrogen gas may also be used.
Next, the reason why the multifilament yarn is fed at a speed more than four times the withdrawal speed of the core yarn is to fully open the multifilament yarn on the sliding surface and to provide flexibility in winding it around the core yarn. By such feeding, the constituent filaments are released from each other and wound around the core yarn while forming individual loops. Therefore, if the feeding speed of the multifilament yarn is less than four times the withdrawal speed of the core yarn, sufficient loops will not be formed, resulting in poor entanglement properties after untwisting. On the other hand, if the feeding speed of the multifilament yarn is too high, it will scatter around the core yarn and will not be wound sufficiently and will not form a cohesive yarn, so the feeding speed should be about 4 to 15 times. Next, regarding the sliding direction of the multifilament yarn 2 and the rotating direction of the core yarn, as shown in FIGS. It is preferable that the winding variation of the filament yarn is also small. The yarn obtained in this way has a bulky and soft feel covered with numerous loops of delicate filaments, has excellent practical performance in terms of loop resistance, and has a spun yarn style with moderate yarn unevenness. It is the thread of

As described above, in the method of the present invention, the multifilament yarn, which is originally a single thread, is fully opened and divided into constituent single yarns, which are then wound around the core yarn, so that there are gaps between the loops and between the loops. It is possible to spin a yarn with sufficient entanglement between the filament and the core yarn. moreover,
Since the degree of freedom of the filament winding point can be increased,
It is possible to select any range of thread unevenness, so it is easy to create fancy effects, and the equipment is simple and can be installed relatively easily on conventional process machines such as drawing machines, so its range of applications is extremely wide. It is something. Polyester filament yarn (10M/
36f), a polyester filament yarn (5M/24f) was used as the multifilament yarn, and the yarn was manufactured using the apparatus shown in FIG.

High-pressure air was used as the fluid, the air pressure of the ejector was 1.0k9'c, and the air pressure of the fluid twisting element was 5.0k.
9/2G, the multifilament yarn supply speed ratio to the core yarn running speed was 6 times, the core yarn tension was 20 mm, and the winding speed was 90 threads/min. At this time, by appropriately changing the path of the core yarn on the sliding surface, a yarn with yarn unevenness of 17 to 29% was obtained.

The thread unevenness was measured using a Worcester Evenestistar type B manufactured by Helvega. The resulting yarn was a spun yarn-like yarn with a soft feel, even though the multifilament loops of the multifilament yarn were tightly wound around the core yarn. A 150/4 polyester pre-combusted yarn is used as a warp, and this is inserted into a weft.
When a 2/2 twill fabric was produced, a product with a warm texture and moderate thread unevenness was obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an apparatus used in the manufacturing method of the present invention;
2 and 3 are respectively a plan view and a front view of the supply open weaving section, FIG. 4 is a perspective view of the collision surface, and FIG. 5 is a view of the fluid combustion element along line V-V in FIG. 1. The vertical cross-sectional view, FIG. 6, is the W in FIG.
FIG. 7 is a cross-sectional view of the ejector taken along the skin line of FIG. 1. DESCRIPTION OF SYMBOLS 1... Package, 5... Ejector, 6... Collision surface, 8... Sliding surface, 12... Fluid suction element, 15... Fluid passage, 17 ...Fluid introduction hole. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. Run the core yarn while twisting it using a fluid twisting element,
The substantially untwisted continuous multifilament yarn is pulled out at a rate of at least 4 times the withdrawal speed of the core yarn upstream of the fluid twisting element.
Spraying it together with a fluid at a fixed collision surface provided near the running of the core yarn at a speed of 5 times or more to open the fibers, allowing the fibers to travel on a sliding surface following the collision surface and joining the core yarn, A method for producing spun yarn-like yarn, which comprises introducing the yarn to the fluid twisting element and untwisting and entangling it.