JP2001140137A - Fluid jetting device having yarn collision unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid jetting device capable of stably producing a bulk- textured yarn having uniform tangles and loops imparted thereto with a good operating efficiency. SOLUTION: This fluid jetting device is obtained by making a yarn collision unit 14 assume a round shape having a threading hole 18 in the central part and providing a circumferential part 16 which is a collision part of the yarn other than the threading hole 18 having a bulge with a curvature in the fluid jetting device equipped with a cylindrical yarn guide hole 12 for running a core yarn therethrough and the yarn collision unit 14 for making the yarn collide therewith near an outlet of the yarn guide hole 12. In the fluid jetting device, the yarn running through the yarn guide hole 12 collides with the circumferential part 16 of the yarn collision unit 14 and is then passed through the threading hole 18 and taken off. The hole diameter of the threading hole 18 is 0.8-1.4 mm and the curvature of the circumferential part 16 is 1.5-2.0. The width of the circumferential part 16 is 2.0-3.3 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid ejecting apparatus for imparting entanglement and loops by fluid treatment for the purpose of imparting bulkiness to a yarn.

[0002]

2. Description of the Related Art Fluid treatment of yarn to increase its bulkiness is a well-known technique, and many methods and apparatuses have been proposed. For example, a Taslan nozzle disclosed in Japanese Patent Publication No. 60-14853 or a hemajet nozzle disclosed in Japanese Patent Publication No. 2-38704 is widely used as a fluid ejection processing apparatus.

[0003] However, all of these fluid jet processing apparatuses are capable of colliding objects of various shapes provided on the yarn exit side.
A loop is formed on the yarn by colliding the yarn with the fluid. Therefore, as the overfeed rate of the supply yarn is increased, the number of loops formed on the yarn increases, and the bulkiness is increased. However, as the overfeed rate increased and the degree of freedom of the yarn in the treatment zone became too large, uniform entanglement and loop entanglement were lacking.

Further, JP-A-1-52843 and JP-A-63-12734 disclose a circular shape having a thread hole at the center as a yarn impacting body, and a circumferential portion other than the thread hole is provided. A fluid ejecting device which is a yarn collision portion and a method for producing a bulky loop yarn using this device are described.

[0005] In these devices, although the degree of freedom of the yarn from the fluid jet nozzle to the yarn colliding body can be appropriately controlled, the uniform entanglement is not taken into account because the shape of the collision portion of the yarn colliding body is not taken into account. It was not possible to stably produce a bulky processed yarn to which a loop or a loop was sufficiently added.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems and makes it possible to stably produce a bulky processed yarn having uniform entanglement and sufficient loops with good operability. It is a technical object to provide a fluid ejection device.

[0007]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention relates to a fluid ejection processing apparatus provided with a cylindrical yarn guide hole through which a yarn travels and a yarn collision body with which the yarn collides near an exit of the yarn introduction hole, wherein the yarn collision body is centered. Presents a circular shape having a threading hole in the portion, the circumferential portion other than the threading hole is a collision portion of the yarn, has a bulge with a curvature,
A fluid jet processing device in which the yarn that has traveled through the yarn introduction hole collides with the circumferential portion of the yarn collision body and is then taken out through the yarn passage hole, wherein the diameter of the yarn passage hole is 0.8 to 1. 4 mm, the curvature of the circumference is 1.5 to 2.0, and the width of the circumference is 2.0 to 3.3 mm
The gist of the present invention is a fluid ejecting apparatus provided with a yarn collision body.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic explanatory view of one embodiment of the fluid ejecting apparatus of the present invention as viewed from the side, and FIG. 2 is a schematic explanatory view showing one embodiment of a thread impactor of the fluid ejecting apparatus of FIG. is there. FIG. 3 is an explanatory diagram showing cross-sectional areas A, B, and C in the fluid ejection device of the present invention. Also, FIG.
FIG. 4 is an explanatory diagram showing a curvature of a circumferential portion in the fluid ejection device of the present invention.

The present invention is directed to a fluid ejection process in which a cylindrical yarn introduction hole 12 of a fluid injection nozzle 11 on which a yarn travels and a yarn collision body 14 with which the yarn collides near the exit of the yarn introduction hole 12 are provided. The device 4. The cross-sectional shape of the yarn introduction hole 12 of the fluid jet nozzle 11 on which the yarn travels is not particularly limited, and may be a circle or a square.

The yarn impacting body 14 has a circular shape having a thread passing hole 18 at the center, and a circumferential portion 16 other than the thread passing hole 18 is a thread impact portion and has a bulge having a curvature. ing.

The yarn is first introduced from the inlet of the yarn introduction hole 12 of the fluid ejection nozzle 11, passes through a fluid ejection portion 19 to which the fluid ejected from the fluid ejection hole 13 is blown, and then passes through a fluid diffusion portion 20. Collides with the yarn collision body 14. The yarn after the collision is taken through the fluid converging portion 21 in the yarn passage hole 18. At this time, it is preferable to take up the yarn in a direction perpendicular to the yarn traveling direction of the introduction hole 12.

With the use of the fluid jet processing apparatus of the present invention, the running yarn collides with the yarn collision body 14 to form a confound and a uniform loop. The mechanism is as follows. . When the yarn is first introduced into the inlet of the yarn introduction hole 12 of the fluid ejection nozzle 11, the fluid is ejected by the fluid ejection unit 19 by the fluid ejected from the fluid ejection hole 13. At this time, turbulence is generated in the fluid diffusion portion 20 in the space between the exit of the yarn introduction hole 12 and the yarn collision body 14.

The yarn colliding with the circumferential portion 16 of the yarn colliding body 14 is bent from the end point of the fluid diffusion portion 20 in a direction perpendicular to the yarn running direction, and passes through the yarn colliding body 14. The yarn is drawn through the fluid converging portion 21 of the yarn hole 18.
The turbulence generated in this space converts the filaments into entanglements and loops on the yarn surface.

In the fluid converging section 21, the entanglement between the filaments and the fixing of the loop on the surface of the yarn are performed, so that the yarn is uniformly entangled or looped.

[0015] Therefore, in order to impart a stable and uniform entanglement or loop to the yarn, the yarn must be sufficiently defibrated by the fluid ejecting portion 19 in the yarn introduction hole 12, and a sufficient driving force In addition, it is possible to cause sufficient collision with the yarn collision body 14 to generate sufficient turbulence, and to fix the entanglement between filaments and the loop on the surface of the yarn with the threading hole 18 of the yarn collision body 14. This is an important point.

The fluid ejection device of the present invention has a sufficient effect in these points by having the structure described below. First, the yarn impacting body 14 which is a yarn impacting portion
Has a bulge with a curvature. Specifically, the curvature is set to 1.5 to 2.0.

The curvature of the circumferential portion 16 refers to the radius of the circle when a circle is drawn along the curve of the circumferential portion 16 on the side surface of the yarn impacting body 14 as shown in FIG. It is.

When the curvature of the circumferential portion 16 is less than 1.5, when the yarn is introduced into the yarn passing hole 18 while colliding with the yarn collision body 14 through the fluid diffusion portion 20, the yarn moves in the yarn traveling direction. On the other hand, it bends too much in the perpendicular direction, and the yarn length difference between the filaments occurs discontinuously, making it difficult to convert the yarn length difference into a uniform entanglement between the filaments and a uniform loop on the yarn surface.

On the other hand, if the curvature exceeds 2.0, when the yarn is introduced into the yarn passage hole 18 while colliding with the yarn colliding body 14 via the fluid diffusion portion 20, the yarn will not move in the yarn running direction. Since the yarn does not bend smoothly in the perpendicular direction, and the yarn length difference between the filaments is discontinuously generated, it is difficult to convert the yarn length difference into a uniform entanglement between the filaments and a uniform loop on the yarn surface.

Next, the width H of the circumferential portion 16 of the yarn impacting body 14
2.0 to 3.3 mm, more preferably 2.5 to 3.
It is one. If the width H of the circumferential portion 16 is less than 2.0 mm, the yarn that has passed through the fluid diffusion portion 20 cannot sufficiently collide with the circumferential portion 16 and the yarn length difference causes entanglement between filaments and a uniform loop on the yarn surface. It is difficult to convert to On the other hand, the circumferential portion 16
When the width H exceeds 3.3 mm, the yarn that collides with the circumferential portion 16 is introduced into the yarn passage hole 18 without being smoothly bent in a direction perpendicular to the yarn running direction, and the yarn length difference is reduced. It becomes difficult to convert the filaments into uniform entanglements and uniform loops on the yarn surface.

The diameter L of the thread passing hole 18 is 0.8 to 1.
4 mm. When the hole diameter L is less than 0.8 mm, the flow rate of the backflow of the pressure fluid introduced from the fluid diffusion unit 20 to the yarn passing hole 18 of the yarn collision body also increases, and the flow rate of the yarn from the fluid ejection nozzle to the yarn collision body increases. The degree of freedom cannot be controlled appropriately.
In addition, operational problems such as clogging of the yarn also occur.

On the other hand, when the hole diameter L exceeds 1.4 mm, the pressure of the fluid in the fluid converging section 21 decreases, and it becomes impossible to entangle the filaments and fix the loop on the yarn surface in a satisfactory manner.

Further, the yarn introduction hole 12 of the fluid jet nozzle 11
And the cross-sectional area A of the fluid ejecting portion 19 from the fluid ejecting hole 13 to the outlet of the yarn introduction hole 12 and the fluid diffusion portion 20 from the exit of the yarn introducing hole 12 to the entrance of the yarn passing hole 18 of the yarn collision body 14. The cross-sectional area B and the fluid focusing portion 21 in the thread passage hole 18 of the yarn impacting body 14
Preferably satisfies 0.9 <A / (B + C) <1.1.

Accordingly, the yarn is defibrated in the fluid ejecting unit 19, the yarn length difference is generated in the fluid diffusing unit 20, the entanglement and the loop are provided, and the entanglement and the loop are fixed in the fluid converging unit 21. The balance is improved, and more uniform confounding and loops can be stably provided.

The fluid ejecting apparatus according to the present invention, in which the yarn is drawn and the like, and then two kinds of yarns are aligned and introduced, and the fluid ejecting process is performed. When used, sufficient entanglement and loops were provided without the need to apply water to facilitate the entanglement and loops, which is usually performed before two types of yarns are aligned and introduced. A bulky yarn can be obtained.

As described above, the fluid jet processing apparatus 4 of the present invention
When the knitting and weaving of the bulky processed yarn formed with a sufficient entanglement and a uniform loop is carried out into a fabric, the fabric surface has no insect-like defects on the fabric surface and has a beautiful surface appearance.

The fluid jet treatment apparatus of the present invention can be used in either a two-step method in which the undrawn yarn is wound and then processed after the winding, or a single step in which the processing is performed after the spinning without the winding. It is possible to use.

Here, an example of a method for obtaining a bulky processed yarn by a two-step method using the fluid jet processing apparatus of the present invention will be described with reference to FIG.

First, the yarn Y1 is stretched between the supply roller 1 and the stretching roller 2 via the stretching pin 3 to form a high shrinkage yarn, and the yarn Y2 is a heat-relaxed stretched low shrinkage yarn. 2. Withdraw without stretching. Next, the yarn Y1 and the yarn Y2 are aligned on the stretching roller 2, guided to the fluid ejection processing device 4 in a relaxed state, subjected to the fluid ejection process, passed through the take-up roller 5, and then wound by the take-up roller 6. And a package 7 is obtained.

In FIG. 5, the two yarns have different shrinkage ratios. However, the two types of yarns to be processed by the fluid ejecting apparatus of the present invention may have the same shrinkage ratio.
Further, they may be supplied at the same speed or at different speeds with a difference in yarn length. Further, in FIG. 5, an example in which two types of yarns are used has been described. However, the fluid ejecting apparatus of the present invention naturally has a bulky processing in which uniform entanglement and loops are formed even when one yarn is subjected to fluid treatment. Yarn can be obtained.

[0031]

Next, the present invention will be described in detail with reference to examples. The measurement of the number of confounds and the number of neps, and the evaluation of loop addition were performed as follows. [Number of confounds] When the fineness of the obtained bulky processed yarn is h,
The number of entangled parts per meter measured by the foot drop method using a load of h × 1/20 (g). [Nep number] Surface loop fluff of 2 mm or more was measured by an optical fluff counter, and indicated by the number of loop fluff per 1 m. [Evaluation of Uniformity] The yarn surface of the obtained bulky processed yarn is visually observed, and the degree of uniformity of the loop is evaluated on a scale of 1 to 5 with 5 having the highest uniformity. did.

Examples 1 to 7 and Comparative Examples 1 to 5 In the two-step method shown in FIG. 5, the fluid jet processing apparatus of the present invention was provided, and the process from stretching to winding was performed. Relative viscosity as yarn Y1 (concentration 1 g / d1, using 96% sulfuric acid as a solvent,
It was measured at a temperature of 25 ° C. ) Using a nylon 6 chip of 2.51 and a nylon 6 unstretched yarn 230dtex / 48f spun at a spinning temperature of 260 ° C and a spinning speed of 1000 m / min. The drawn yarn 230dtex / 48f was drawn at a draw ratio of 2.95.
A nylon 6 stretched yarn (78 dtex / 48f) stretched twice and subjected to relaxation heat treatment (190 ° C.) was used. In the step shown in FIG. 5, the yarn Y1 is stretched using the stretching pin 3 so that the surface speed of the stretching roller 2 is 300 m / min.
The film is drawn at a surface speed ratio of 2.95 of the drawing roller 2 to the drawing 1 and subjected to relaxation heat treatment (190 ° C.). Was done.

Then, a stretching roller for the take-up roller 5 is drawn.
The fluid ejection process was performed at a surface speed ratio of 1.20 and a pressure of 8 kg / cm ² of the jet compressed air of the fluid ejection processing device 4. At this time, the dimensions of each part of the yarn impacting body 14 of the fluid ejection processing device 4 were variously changed as shown in Table 1. After passing through the take-up roller 5, the take-up roller 6 was taken up at a speed of 255 m / min to obtain a 155d / 96f bulky processed yarn. Table 1 shows the evaluation results of the obtained bulky yarn.
Shown in 2

[0034]

[Table 1]

[0035]

[Table 2]

As is clear from Table 1, in Examples 1 to 7, the fluid jetting treatment can be stably performed, and the obtained bulky processed yarn has a sufficient entanglement and a uniform loop. The strip had a beautiful appearance with a small number of neps on the surface. On the other hand, in Comparative Example 1, since the circumferential portion had a flat surface with no curvature, the yarn after the collision with the circumferential portion did not bend smoothly in the direction perpendicular to the yarn running direction, and the yarn passed through the yarn passing hole. Since it is introduced, it becomes difficult for the yarn length difference between the filaments to be converted into the entanglement between the filaments and the uniform loop on the yarn surface, and the obtained bulky processed yarn is not provided with a uniform loop. In addition, many neps occurred on the yarn surface. In Comparative Example 2, the same phenomenon as in Comparative Example 1 occurred because the curvature of the yarn impacting body was too large, and the obtained bulky processed yarn was not uniformly provided with a loop, and many yarns were formed on the yarn surface. Nep occurred. In Comparative Example 3, the curvature of the yarn impacting body was too small.
The yarn after colliding with the circumferential portion bends too much in the direction perpendicular to the yarn running direction, and it becomes difficult for the yarn length difference between the filaments to become entangled between the filaments and converted into a uniform loop on the yarn surface, The obtained bulky processed yarn was not sufficiently entangled, had a nonuniform loop, and generated many neps. In Comparative Example 4, since the collision width of the circumferential portion was too small, the fluid diffusion portion 2
The thread passing through 0 cannot sufficiently collide with the circumferential portion 16, making it difficult to convert the difference in yarn length into filaments entangled and converted into a uniform loop on the yarn surface. No confounding was imparted, the loop was uneven, and there were many occurrences of neps. In Comparative Example 5, since the collision width of the circumferential portion was too large, the same phenomenon as that in Comparative Example 1 could occur. Nep occurred. In Comparative Example 6, since the hole diameter of the yarn passing hole was too small, the pressure fluid introduced into the yarn passing hole of the yarn colliding body from the fluid diffusion section also increased in the reverse flow rate, and the fluid ejecting nozzle ran from the fluid ejection nozzle to the yarn colliding body. The degree of freedom of the resulting yarn could not be controlled appropriately, and the resulting bulky processed yarn was not sufficiently entangled, had a nonuniform loop, and generated many neps. Also,
The operability was poor due to frequent thread breakage due to thread clogging during processing. In Comparative Example 7, since the hole diameter of the threading hole was too large,
The entanglement between the filaments in the fluid focusing portion and the fixing of the loop on the yarn surface could not be performed, and the obtained bulky processed yarn was not sufficiently entangled, and the loop was uneven and the nep was frequent. .

[0037]

According to the fluid jet processing apparatus of the present invention, a uniform entanglement and a loop can be stably provided, and a high-quality bulky yarn can be manufactured with good operability.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of one embodiment of a fluid ejection device of the present invention as viewed from a side.

FIG. 2 is a schematic explanatory view showing one embodiment of a yarn impacting body of the fluid ejection device of FIG. 1;

FIG. 3 is a cross-sectional area of a fluid ejection device according to the present invention.
It is explanatory drawing which shows C.

FIG. 4 is an explanatory diagram showing a curvature of a circumferential portion in the fluid ejection device of the present invention.

FIG. 5 is a schematic process diagram illustrating an example of a process of manufacturing a bulky processed yarn using the fluid ejection device of the present invention.

[Explanation of symbols]

 11: Fluid injection nozzle 12: Yarn introducing hole 13: Fluid injection hole 14: Yarn collision body 16: Circumference L: Hole diameter of yarn passage H: Width of circumference 18: Yarn passage 19: Fluid injection unit 20: Fluid diffusion unit 21: Fluid focusing unit

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takehiko Yasui 5 Unitika, Uji-Tonouchi, Uji-city, Kyoto Pref. Inside the Uji Plant, Ltd. Reference) 4L036 AA01

Claims (2)

[Claims] In a fluid jet processing apparatus provided with a cylindrical yarn introduction hole on which a yarn travels and a yarn collision body with which the yarn collides near an exit of the yarn introduction hole, the yarn collision body has a central portion. Has a circular shape having a thread passage hole, and a circumferential portion other than the thread passage hole is a collision portion of the yarn, has a bulge with a curvature, and the yarn traveling through the yarn introduction hole has a yarn collision. A fluid ejection treatment device which is drawn through a yarn passing hole after colliding with a circumferential portion of a body, wherein the hole diameter of the yarn passing hole is 0.8 to 1.4 mm, and the curvature of the circumferential portion is 1.5.
A fluid ejecting apparatus comprising a yarn impacting body, wherein the width of the circumferential portion is 2.0 to 3.3 mm. 2. The relationship among a sectional area A of a fluid ejecting portion of a yarn guide hole, a sectional area B of a fluid diffusing portion, and a sectional area C of a fluid converging portion in a side section of a fluid ejection processing device satisfies the following expression. A fluid ejecting apparatus comprising the yarn impacting body according to claim 1. 0.9 <A / (B + C) <1.1