JP2000303280A - Fluid jet treating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid jet treating apparatus capable of imparting sufficient interlacing and uniform loop even in a high speed production exceeding 1,000 m/minute and stably producing a bulky finished yarn. SOLUTION: This fluid jet treating apparatus is equipped with a cylindrical yarn guide hole 1 through which a yarn travels and a yarn hitting body 2 against which the yarn collides in the vicinity of the outlet of the yarn guide hole 1. The yarn guide hole 1 comprises a yarn introduction part 11, a fluid jet part 12, a fluid accelerating part 13 and a fluid diffusing part 14 along the traveling direction of the yarn. The yarn having collided against the yarn hitting body 2 is taken off from an end point R of the fluid diffusing part 14 downward. The yarn guide hole is in a tapered state in the yarn introduction part 11, the fluid accelerating part 13 and the fluid diffusing part 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid jet processing apparatus for imparting entanglement and loops by fluid treatment in order to impart 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, as a fluid processing apparatus, a Taslan nozzle disclosed in Japanese Patent Publication No. 60-14853 and a hemajet nozzle disclosed in Japanese Patent Publication No. 2-38704 are widely used.

[0003] However, these fluid treatment devices are:
Since the yarn introduction holes are simply provided in a parallel cylindrical shape, if they are used in the process of producing semi-undrawn yarns or drawn yarns at high speed, entanglement shortage frequently occurs. Even if the pressure of the fluid is increased to prevent this, sufficient entanglement cannot be imparted, and the speed at which a bulky processed yarn can be stably produced is 1000
m / min or less.

Japanese Patent Application Laid-Open No. 9-310241 discloses a fluid treatment apparatus in which the diameter of the yarn introduction hole is changed. According to this apparatus, in the production in the range of 100 to 900 m / min, even if the speed is increased, it is possible to impart the same degree of confounding as when the production speed is low.
However, even in this apparatus, although the diameter of the yarn introduction hole is changed, the acceleration of the fluid is not sufficiently considered, so that at a high speed exceeding 1000 m, the bulky processed yarn provided with sufficient entanglement is stabilized. Could not be produced.

Further, since the conventional fluid treatment device is a closed type, at the start of processing or when the yarn breaks, the yarn is manually passed from the inlet to the exit of the fluid treatment device, and then passed to the winding device. Therefore, there is a problem that the workability is low, and particularly in the case of a one-step spinning method in which the spinning is performed at a high speed, the operation is difficult.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and can provide a sufficient entanglement and a uniform loop even in the case of high-speed production exceeding 1000 m / min. It is an object of the present invention to provide a fluid ejection processing apparatus capable of stably producing a fluid.

[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 provides a spherical yarn impacting body in which the yarn collides near the exit of the cylindrical yarn guiding hole on which the yarn travels, and the yarn guiding hole extends along the yarn traveling direction. A fluid ejection processing device comprising an introduction unit, a fluid ejection unit, a fluid acceleration unit, and a fluid diffusion unit, wherein the yarn introduction unit has a yarn introduction hole diameter that gradually decreases along the yarn traveling direction. In the fluid ejecting section, the yarn guide hole has a substantially uniform diameter a, and the outer periphery of the yarn guide hole has a cylindrical shape with a hole diameter b of 0.
Three or more fluid ejection holes satisfying 3a ≦ b ≦ 0.7a are provided so that the incident angle α with respect to the yarn introduction hole is 30 ° ≦ α ≦ 60 °, and the fluid accelerating unit includes An angle (acceleration angle) β formed by a line having a hole diameter gradually larger than a and a line drawn horizontally from the base point P and a line connecting the base point P and the end point Q is 5 ° ≦ β ≦
15 °, and the fluid diffusion portion gradually increases toward the end point R so that the diameter of the yarn introduction hole draws a smooth curve, and a line drawn horizontally from the base point P of the fluid acceleration portion and the base point P (Diffusion angle) γ between the line connecting the fluid diffusion part and the end point R of the fluid diffusion part is 30 ° ≦ γ ≦ 60 °, the length L1 of the fluid injection part is 4a ≦ L1, and The length L2 to the base point P of the fluid accelerating portion is 0.5a≤L2≤3
a, the length L3 of the fluid accelerating portion is 5a≤L3≤10a, and the total length L4 of the fluid accelerating portion and the fluid diffusing portion is 8a≤L4
≦ 15a, and the diameter c of the thread colliding body is 9a ≦ c ≦ 15a.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory sectional view showing one embodiment of the fluid ejection processing apparatus of the present invention. The present invention is an apparatus provided with a yarn impacting body 2 with which a yarn collides near an exit of a cylindrical yarn guiding hole 1 on which the yarn travels. Along the yarn introduction section 11, the fluid ejection section 1
2, a fluid accelerating section 13 and a fluid diffusing section 14.
The yarn diameter of the yarn introduction hole 1 is changed in each of these four portions.

[0009] The yarn is first introduced from the yarn introduction part 11, and after the fluid is injected by the fluid injection part 12, it collides with the yarn collision body 2 through the fluid acceleration part 13 and the fluid diffusion part 14,
The fluid is drawn from the end point R of the fluid diffusion section 14 in a direction perpendicular to the yarn running direction.

Next, each part of the introduction hole 1 will be described in order. First, in the yarn introduction section 11, the yarn introduction hole diameter gradually decreases along the yarn traveling direction, and the yarn introduction hole diameter at the end point N of the yarn introduction section is a. And, showing the change of this introduction hole diameter,
The angle (radiation angle) θ between the line drawn horizontally from the end point N of the yarn introduction portion and the introduction hole is preferably 5 ° or more.

As a result, the pressure of the fluid flowing backward from the fluid injection hole toward the inlet of the yarn introduction portion is reduced by the radiation angle (θ) of the yarn introduction portion, so that the yarn supplied to the yarn introduction hole is reduced. Vibration that hinders defibration is less likely to occur in the yarn, and the yarn can be stably supplied at a high speed, and a bulky processed yarn to which uniform entanglement is imparted even at a high speed can be obtained. If the angle θ is less than 5 °, this effect is small, and the yarn is likely to vibrate, resulting in insufficient fibrillation and difficult to supply at high speed and stably.

The fluid jetting part 12 has a diameter a of which the yarn introduction hole diameter is substantially uniform, and the outer periphery of the yarn introduction hole 1 is cylindrical and has a hole diameter b of 0.3a ≦ b ≦ 0.7a. Some fluid injection holes 3 are 3
The angle of incidence α is 30 ° ≦ α ≦ 60 ° with respect to the running direction of the yarn (yarn guide hole).

The inventors of the present invention have conducted various studies on the shape of the fluid ejecting portion in order to stably perform fluid ejection processing on a yarn running at a high speed. As a result, the yarn introducing hole diameter a and the fluid ejecting hole diameter b are 0.3a ≦.
By satisfying the relational expression of b ≦ 0.7a, the fluid injection holes 3
It has been found that the supplied pressurized fluid breaks the yarn traveling through the yarn introduction hole 1 most efficiently.

When the diameter b of the fluid injection hole is less than 0.3a, the flow rate of the fluid injected from the fluid injection hole 3 becomes small, and the energy for defibrating and propelling the supplied yarn is insufficient, so that a stable fluid is obtained. Injection processing cannot be performed. On the other hand, when the fluid injection hole diameter b exceeds 0.7a, the flow rate of the pressurized fluid supplied from the fluid injection hole 3 in the reverse direction in the yarn introduction hole 1 as well as in the running direction of the yarn increases, and Cannot be stably opened.

If the number of the fluid injection holes 3 provided on the outer periphery of the yarn introduction hole 1 is less than three, the pressure fluid necessary for stably defibrating and propelling the yarn traveling at a high speed through the yarn introduction hole is required. Cannot be obtained. The upper limit of the number of the fluid injection holes 3 is not particularly limited, but if the number is too large, the effect is saturated and the processing cost is increased. And, these fluid injection holes 3
Are preferably provided at equal intervals on the outer periphery of the yarn introduction hole 1.

Further, the fluid injection holes 3 are provided such that the incident angle α with respect to the running direction (yarn guiding hole) of the yarn is 30 ≦ α ≦ 60. Thereby, the pressure fluid introduced into the yarn introduction hole 1 from the fluid injection hole 3 has an optimum defibrating force and a propulsive force for the yarn. When the incident angle α is less than 30 °,
Since the propulsive force of the pressure fluid introduced from the fluid injection hole 3 into the yarn introduction hole 1 becomes excessive and the fibrillation power becomes insufficient, the yarn cannot be stably fibrillated. On the other hand, when the incident angle α exceeds 60 °, the pressurized fluid introduced from the fluid ejection hole 3 into the yarn introduction hole 1 has a defibrating force, but forms interlace-like confounding, and the reverse flow increases to promote propulsion. Due to insufficient power, it is not possible to stably perform fluid injection processing on a yarn running at high speed.

The length L1 of the fluid ejecting section 12 is 4a ≦
L1 and the length L2 from the hole end O on the yarn running direction side of the fluid injection hole to the base point P of the fluid accelerating portion must satisfy 0.5a ≦ L2 ≦ 3a. Thereby, the yarn traveling at high speed can be defibrated stably. When the length L1 is less than 4a, the vibration generated in the yarn near the entrance of the fluid ejection processing device by the fluid flowing backward through the yarn introduction hole 1 is propagated to the yarn near the fluid ejection hole without decreasing. The filaments cannot be stably opened.

When the length L2 is less than 0.5a, the pressure fluid introduced from the fluid injection hole into the yarn guide hole is directed to the fluid accelerating section before the flow velocity in the yarn guide hole becomes uniform in the running direction of the yarn. Since it is supplied, the defibration state becomes unstable. On the other hand, when L2 exceeds 3a, the pressure resistance in the running direction of the yarn to the pressurized fluid introduced from the fluid injection hole into the yarn introduction hole becomes large,
The reverse flow increases and the propulsive force becomes insufficient, and it becomes impossible to stably perform the fluid injection processing on the yarn running at high speed.

The pressure of the fluid supplied from the fluid injection hole 3 is not particularly limited, but is 6 to 9 kg / cm ^2.
It is preferable to set the degree.

Next, in the fluid accelerating unit 13, the diameter of the yarn introduction hole gradually increases from a in the running direction of the yarn.
The angle (acceleration angle) β formed by a line indicating the change in the hole diameter, which is drawn horizontally from the base point P, and a line connecting the base point P and the end point Q is 5
° ≦ β ≦ 15 °, and the length L3 of the fluid accelerating portion is 5a
.Ltoreq.L3 .ltoreq.10a.

Accordingly, the flow rate of the pressure fluid introduced from the fluid injection hole into the yarn introduction hole is reduced by the appropriate diffusion action to the Mach 2
As described above, preferably, the acceleration can be accelerated to Mach 4 or more, and the yarn running at a high speed can be stably subjected to the fluid injection processing. Acceleration angle β
Is less than 5 ° or when the fluid acceleration length L3 is less than 5a, the diffusion action of the pressure fluid is small and the flow velocity is not accelerated to Mach 2 or more, so the propulsion is insufficient and the yarn running at high speed is stabilized. And cannot perform fluid ejection processing. Acceleration angle β is 15
When the temperature exceeds °, or when the fluid acceleration length L3 exceeds 10a, the pressure fluid is excessively diffused, so that both the flow velocity and the flow rate become non-uniform in the yarn introduction hole of the fluid acceleration section, and the yarn running at high speed is stabilized. And cannot perform fluid ejection processing.

The fluid diffusing section 14 gradually increases in diameter toward the end point R so as to draw a smooth curve. The fluid accelerating section 13 indicates a change in the hole diameter.
A line drawn horizontally from the base point P, the base point P, and the fluid diffusion portion 14
Angle (diffusion angle) γ with the line connecting to the end point R is 30 °
.Ltoreq..gamma..ltoreq.60.degree., And the total length L4 of the fluid accelerating portion 13 and the fluid diffusing portion 14 must be 8a.ltoreq.L4.ltoreq.15a.

Since the fluid diffusing portion 14 has such a shape, the direction of the fluid for driving the yarn existing near the center in the yarn introduction hole is not disturbed. It is possible to cause the yarn defibrated in 13 to collide with the yarn colliding body 2 while maintaining the defibrated state. Further, the yarn in the yarn introduction hole smoothly bends in the direction perpendicular to the yarn running direction while colliding with the yarn collision body 2 via the fluid diffusion portion 14, so that the yarn length difference between the filaments is stepwise. The yarn length difference is converted into entanglement between filaments and a uniform loop on the yarn surface. When there is no fluid diffusion part having a smooth curve and fluid is ejected from the end point of the fluid acceleration part, the fluid accelerated along the yarn guide hole wall of the fluid acceleration part leaves the yarn guide hole at the acute angle part of the end point. As a result, a turbulent flow is generated, which adversely affects the defibration state of the yarn.

Therefore, when γ is less than 30 °, the spread of the fluid diffusion portion 14 is insufficient, and when γ exceeds 60 °, the spread of the fluid diffusion portion 14 becomes too large. After the yarn in the hole collides with the yarn colliding body, it cannot bend smoothly near the end point R of the fluid diffusion portion 14, the yarn length difference between the filaments does not occur stepwise, and the yarn length difference is reduced. It is not converted into interlacing between the yarns and uniform loops on the yarn surface.

When L4 is less than 8a, the fluid diffusion portion is too short, so that the yarn is sharply bent in a direction perpendicular to the direction of the yarn introduction hole after colliding with the yarn colliding body, and the yarn length difference is reduced. It is not converted into interlacing between the yarns and uniform loops on the yarn surface.

When L4 exceeds 15a, the fluid diffusion portion is too long, so that even after the yarn collides with the yarn colliding body, the yarn is gradually loosened in the direction perpendicular to the running direction along the gently curved fluid diffusion portion. The yarn length difference gradually occurs, and most of the yarn length difference is converted into entanglement between filaments, so that a uniform loop is not formed on the yarn surface.

In the fluid jet processing apparatus of the present invention, it is preferable that the cylindrical yarn introduction hole 1 is provided so as to be dividable along the cross section in the yarn running direction. That is,
The fluid ejection processing device is usually made of metal such as stainless steel, and is formed by drilling a cylindrical yarn introduction hole 1 therein. The hole 1 is provided so as to be divided, and, for example, the fluid jet processing device itself is provided along the cross section of the yarn introduction hole 1 in the yarn running direction.
One having a shape that can be divided into planes (up and down or left and right planes), or one in which the yarn introduction hole 1 is divided into two surfaces along a cross section in the yarn running direction.
One having a shape that allows a part of the fluid ejection processing apparatus including the surface to be taken out is exemplified.

As described above, since the cylindrical yarn introduction hole 1 is provided so as to be dividable along the cross section in the yarn running direction, the conventional yarn introduction hole 1 can be used even when the yarn is passed for starting or yarn breakage. When the thread can be separated into the upper and lower surfaces as described above without manually passing the thread from the inlet to the outlet as described above, the thread is first passed through the lower surface of the yarn introduction hole 1 and In this case, even if the yarn breaks in one spinning process running at high speed, it is possible to pass the yarn while picking up the running yarn with a suction gun or the like. Is significantly improved.

When the fluid jet processing apparatus of the present invention is used, the running yarn collides with the yarn colliding body 2 to form a confound and a uniform loop. The mechanism is as follows. . The fluid accelerated by the fluid accelerating unit 13 collides with the yarn colliding body 2, and at this time, turbulence is generated in the space between the yarn colliding body 2 and the fluid diffusion unit 14. Then, the yarn colliding with the yarn colliding body is bent from the end point R of the fluid diffusion portion 14 in a direction perpendicular to the yarn traveling direction and is taken out. The yarn length difference generated at this time is converted into entanglement between filaments and a loop on the yarn surface by the turbulence generated in the space.

Therefore, in order to impart a high-speed, stable and uniform entanglement or loop to the yarn, it is necessary that the yarn is sufficiently opened at the yarn introduction hole and that the yarn has a sufficient driving force. An important point is that it collides with the yarn impacting body 2 and generates sufficient turbulence.

In order to generate a sufficient turbulent air flow as described above, it is preferable that the diameter c of the thread collision body 3 is set to 9a ≦ c ≦ 15a, and the yarn collision body 3 is provided as close to the fluid diffusion part 14 as possible.

When the diameter c of the thread collider is less than 9a, the fluid colliding with the thread collider tends to flow along the surface of the collider, and sufficient turbulence is generated in the space between the thread collider and the fluid jet processing device. Does not occur, it is difficult to form a loop stably at high speed. Further, the diameter c of the yarn impacting body is 15
If the value exceeds a, sufficient turbulence is generated in the space between the yarn impacting body and the fluid ejection processing device, but the yarn collides with the yarn impacting body and is sharply bent in a direction perpendicular to the yarn traveling direction at the same time. Since the yarn length difference between the filaments is instantaneously generated, the yarn length difference is not converted into the entanglement between the filaments and the uniform loop on the yarn surface.

As described above, according to the fluid jet processing apparatus of the present invention, the diameter of each portion of the yarn introduction hole 1 is defined so as to have an appropriate spread and length. Is less likely to cause vibrations in the yarn that hinder opening,
In the fluid ejection unit 12, the fluid ejected from the fluid ejection holes 3 does not flow backward, and can stably open the yarn with a sufficient force. When the fluid advances to the fluid accelerating portion 13, the fluid accelerates while traveling along the outer wall, and turbulence does not occur even in the center of the yarn introduction hole. The yarn can be run in an open state, and after proceeding to the fluid diffusion section 14,
The yarn can be caused to collide with the yarn collision body 2 with a sufficient driving force. As a result, sufficient turbulence is generated, and the conventional 10
At a processing speed of 00m / min or less, of course,
Even when processing by increasing the pressure of the fluid at a speed of 1000 m / min or more, sufficient entanglement and a uniform loop can be provided, and a bulky processed yarn can be stably manufactured.

As described above, when the bulky yarn, which has been subjected to the fluid treatment by the fluid ejection treatment apparatus of the present invention and has sufficient entanglement and uniform loops, is knitted and woven into a fabric, the surface of the fabric has an insect-like defect. No beautiful surface appearance.

The fluid jet processing apparatus of the present invention can be used in either a two-step method in which the undrawn yarn is wound and then processed, or a one-step method in which the processing is performed after the spinning without winding. Although it is possible to use it, if the yarn introduction hole of the fluid jet treatment device of the present invention is provided so as to be dividable along the cross section in the yarn running direction as described above, it can be used well in the one-step method. Can be.

An example of a method of performing the process from spinning to winding by providing the fluid jet processing apparatus of the present invention in a one-step method will be described with reference to FIG. First, the chips are melted by the extruders 20 and 21 and spun from the spinnerets, respectively.
And The yarn A is stretched between the godet roller 22 and the heated godet roller 23 to be a high-shrink yarn, and the yarn B is taken up almost without stretching between the godet roller 24 and the heated godet roller 23, It is a contraction yarn. Next, the yarn A and the yarn B are aligned on the godet roller 23, water is applied by the slit nozzle 26, the yarn is passed through the fluid ejection processing device 27 in a relaxed state, and after passing through the godet roller 25, winding is performed. The film is wound by the device 28.

In the fluid jet treatment apparatus of the present invention, it is preferable to supply after supplying moisture to the yarn as described above.
Depending on the purpose, brand and the like of the yarn to be obtained, it may not be necessary to provide the yarn.

In the method shown in FIG. 2, the two yarns have different shrinkage ratios. However, the two yarns may have the same shrinkage ratio. It may be supplied with a long difference.

[0039]

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] The number of loop fluffs per meter measured by an optical fluff counter for surface loop fluffs of 2 mm or more. [Loop] The yarn surface of the obtained bulky processed yarn was visually observed, and the degree of uniform application of the loop was evaluated on a scale of 1 to 5, with 5 having the highest uniformity.

Examples 1 to 6 and Comparative Examples 1 to 9 In the one-step method shown in FIG. 2, a process from spinning to winding was carried out using the fluid jet processing apparatus of the present invention. First, the relative viscosity (concentration 1 g / dl using 96% sulfuric acid as a solvent, temperature 25 ° C.
Was measured. 2.5) Nylon chip of 2.53 was treated with water content of 0.
Extruder 2 after adjusting to 13%
0, 21 and spinning at a spinning temperature of 260 ° C., and a 24 A yarn A from the spinneret below the extruder 21.
48f from the spinneret below the extruder 20.
Was spun. Thread A is godet roller 22 and 1
2.5 mm between the godet roller 23 heated to 10 ° C.
It was stretched 5 times to obtain a high shrinkage yarn 70d / 24f. Thread B
Is stretched 1.01 times between the godet roller 24 and the godet roller 23 heated to 110 ° C.
d / 48f. Next, the yarn A and the yarn B are aligned on the godet roller 23, water is applied by a slit nozzle 26, and then the yarn is passed through a fluid jet processing device 27 to which a pressure fluid of 8 kg / cm ² is supplied. Fluid treatment was performed. At this time, the length and diameter of each part of the yarn introduction hole of the fluid ejection processing device 27,
The angle and the diameter of the yarn impacting body were variously changed as shown in Table 1. The fluid jet processing device has a shape that can be divided into an upper surface and a lower surface along the cross section of the yarn introduction hole 1 in the yarn running direction. Then, after passing through a godet roller 25 in a relaxed state with an overfeed rate of 4%, it was wound by a winding device 28 at a speed of 4000 m / min to obtain a bulky processed yarn of 140d / 72f. Table 1 also shows the length, diameter, and angle of each part of the yarn introduction hole of the fluid ejection processing device, the diameter of the yarn impacting body, and the evaluation of the number of entanglements, the number of neps, and the loop of the obtained bulky processed yarn. Show.

[0041]

[Table 1]

As is clear from Table 1, in Examples 1 to 6, the fluid treatment can be stably performed, and the obtained bulky processed yarn is provided with sufficient entanglement and a uniform loop, and the yarn surface Had a beautiful appearance with a small number of NEPs. Since the fluid jet processing device itself has a shape that can be divided into an upper surface and a lower surface along a cross section of the yarn introduction hole 1 in the yarn running direction, when the yarn breaks, the yarn passing operation is easily performed. The workability was good. On the other hand, in Comparative Example 1, since the incident angle α was too large, the flow rate of the pressure fluid introduced into the yarn introduction hole 1 from the fluid ejection hole 3 also increased, and the thrust was insufficient. The yarn cannot be stably subjected to the fluid injection treatment, and the obtained bulky processed yarn is not uniformly provided with a loop, and a large number of neps are generated on the yarn surface. The resulting fabric had many bug-like defects on the surface. In Comparative Example 2, the acceleration angle β was too small, and in Comparative Example 4, the fluid accelerating length L3 was too small, and the diffusion action of the pressure fluid became small, and the flow velocity could not be accelerated to Mach 2 or more. Insufficiency, a sufficient number of confounds could not be provided, and yarn breakage during processing frequently occurred, resulting in poor operability. In Comparative Example 3, since the angle γ was too small, the spread of the fluid diffusion portion 14 was insufficient, and the yarn in the yarn introduction hole collides with the yarn collision body, and then smoothly bends near the end point R of the fluid diffusion portion 14. As a result, the obtained bulky processed yarn was not sufficiently entangled, had a non-uniform loop, and generated many neps. In Comparative Example 5, although the diameter c of the yarn colliding body was too large, the obtained bulky processed yarn was sufficiently entangled. However, many neps were present on the yarn surface, and this yarn was manufactured. When weaving, insect-like defects occurred frequently on the fabric surface. In Comparative Example 6, since the fluid ejection hole diameter b was too small, the flow rate of the fluid ejected from the fluid ejection hole 3 was reduced, and the energy for defibrating and propelling the yarn was insufficient.
In Comparative Example 7, since the length L1 of the fluid jetting portion was too short, the vibration generated in the yarn near the entrance of the fluid jetting device by the fluid flowing backward through the yarn introduction hole 1 did not decrease.
The obtained bulky processed yarn was not provided with sufficient entanglement. In Comparative Example 8, since the fluid jetting part L2 was too short, the pressure fluid was supplied to the fluid accelerating part before the flow velocity became uniform in the running direction of the yarn in the yarn introduction hole, and the defibration state became unstable.
In Comparative Example 9, since the length L4 of the fluid acceleration / diffusion portion was too long, the yarn length difference was not well converted into entanglement and loop between filaments. No confounding and uniform loops were imparted.

[0043]

According to the fluid ejection processing apparatus of the present invention, 1
Sufficient entanglement and a uniform loop can be provided at a processing speed of 000 m / min or more, and a bulky processed yarn can be stably produced. Furthermore, by providing a cylindrical yarn introduction hole so as to be dividable along the cross section in the yarn running direction,
Even when used in the one-step spinning method, at the time of yarn breakage, it is possible to easily pass a yarn traveling at a high speed, thereby improving operability.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing one embodiment of a fluid ejection processing apparatus according to the present invention.

FIG. 2 is a process chart showing one embodiment of a one-step spinning method using the fluid jet processing apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Yarn introduction hole 2 Thread colliding body 3 Fluid ejection hole 11 Thread introduction part 12 Fluid ejection part 13 Fluid acceleration part 14 Fluid diffusion part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Nishida 5 Uji Tonouchi, Uji City, Kyoto Prefecture Unita Corporation Uji Factory F-term (reference) 4L036 AA01

Claims (2)

[Claims] 1. A sphere-shaped yarn collision body against which a yarn collides is provided near an exit of a cylindrical yarn introduction hole on which a yarn travels, and the yarn introduction hole introduces the yarn along the traveling direction of the yarn. Section, fluid ejection section,
A fluid injection processing device comprising a fluid accelerating unit and a fluid diffusing unit, wherein the yarn introduction hole diameter gradually decreases along the yarn traveling direction, and the yarn introduction hole diameter at the end point N of the yarn introduction unit. Is a
In the fluid ejecting section, the yarn introduction hole has a substantially uniform diameter a,
The outer periphery of the yarn introduction hole has a cylindrical shape with a hole diameter b of 0.3a ≦ b ≦
Three or more fluid ejection holes having a diameter of 0.7a are provided so that the incident angle α with respect to the yarn guide hole is 30 ° ≦ α ≦ 60 °. The angle (acceleration angle) β formed by a line drawn horizontally from the base point P and a line connecting the base point P and the end point Q is 5 ° ≦ β ≦ 15 °, and the fluid diffusion part has an end point R And a line connecting the base point P and the end point R of the fluid diffusion part with a line drawn horizontally from the base point P of the fluid accelerating part, and a line drawn horizontally from the base point P of the fluid accelerating part. Angle (diffusion angle)
γ is 30 ° ≦ γ ≦ 60 °, and the length L1 of the fluid injection portion is 4a ≦ L1, and the length L2 from the end O of the fluid injection hole to the base point P of the fluid acceleration portion is 0.5a ≦ L2 ≦ 3a. The length L3 of the fluid accelerating portion is 5a≤L3≤10a, the total length L4 of the fluid accelerating portion and the fluid diffusing portion is 8a≤L4≤15a, and the diameter c of the thread impactor is 9a≤c≤15a. A fluid ejection processing device. 2. The fluid jet processing apparatus according to claim 1, wherein the cylindrical yarn introduction hole is provided so as to be divided along a cross section in the yarn running direction.