JP2645473B2 - Yarn processing nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a yarn for causing a loop or entanglement in the yarn by the jetting force of a pressurized fluid, thereby giving the yarn bulkiness. Regarding the processing nozzle.

(Conventional technology and its problems) When manufacturing textiles such as carpets,
It is well known that bulky yarn is used. However, since synthetic fibers originally do not have such bulkiness, a yarn obtained by simply combining a plurality of filaments after spinning is not suitable for such a use. Therefore, the injection force of the pressurized fluid causes the synthetic fiber filament forming the yarn to form a loop shown in FIG. 18 (a) or an entanglement shown in FIG. 18 (b), thereby causing the yarn to be artificially formed. Various yarn processing nozzles for providing bulkiness have been proposed.

As a typical example of such a yarn processing nozzle, there is a nozzle disclosed in Japanese Patent Application Laid-Open No. 52-21446 (a so-called "Taslan nozzle"). FIG. 19 is a sectional view of the Taslan nozzle, and FIG. 20 is a sectional view taken along line AA.

In these drawings, the nozzle 1 has a structure in which a needle 4 having a yarn guide path 5 is inserted into a center hole 3 provided along an axis of a substantially hollow cylindrical nozzle body 2. . The yarn introduction path 5 has a yarn introduction port 6 and a yarn discharge port 7 at both ends thereof.
The venturi member 8 is provided at a position facing the. The venturi member 8 has a conical surface 9 surrounding the yarn discharge port 7 and a yarn lead-out passage 10 extending from the conical surface 9 and leading to the outside. A gas supply hole 11 for supplying compressed air from the outside communicates with the center hole 3 in a direction substantially perpendicular to the axial direction of the center hole 3.

When the compressed air is supplied from the gas supply hole 11 in the nozzle 1 having such a structure, the compressed air is supplied to the first annular air chamber 12 formed by the gap between the center hole 3 and the needle 4. After that, it moves to the second annular air chamber 14 through the orifice 13. Then, the compressed air is ejected from the nozzle opening 15 to the outside of the nozzle 1 through the yarn outlet path 10.

On the other hand, the yarn Y to be processed is introduced from the yarn inlet 6. The yarn Y passes through the yarn introduction path 5 and is released from the yarn discharge port 7.
In the vicinity of the yarn discharge port 7, there is a high-speed airflow from the second air chamber 14 to the outside of the nozzle 1 through the yarn outlet path 10. For this reason, the yarn Y is sucked into the yarn outlet path 10 by the Venturi effect. Then, the filaments forming the yarn Y are led out of the nozzle opening 15 while being entangled with each other by the air flow.

By the way, such a Taslan nozzle 1 has the advantage that the efficiency of imparting bulkiness is high, but has the problem of low operability. That is, since the needle 4 and the venturi member 8 are used, clogging of the needle 4 and the venturi member 8 easily occurs, and the cleaning cycle is considerably shortened.

Nozzles that have solved this drawback have already been proposed, and a representative one of them is the nozzle disclosed in JP-A-53-19446 (so-called "Heber line nozzle"). FIG. 21 is a sectional view of the nozzle 20. As shown in the figure, in the nozzle 20, a part of the yarn introduction path 21 having a circular cross section is a vortex chamber 22 also having a circular cross section. A gas injection hole 23 communicates in an oblique direction with respect to the axis of the vortex chamber 22, and a vortex of air is generated in the vortex chamber 22 by injecting compressed air from the gas injection hole 23. .

On the other hand, a nozzle head 25 having a conical surface 24 is provided at the open end of the vortex chamber 22, and a spherical guide member 26 is provided to face the conical surface 24.

Therefore, if the yarn Y is guided to the vortex chamber 22 in the yarn introduction path 21,
The filaments forming the yarn Y are interlocked and entangled with each other by the vortex in the vortex chamber 22, and a filament loop is formed. Thereafter, the yarn Y is guided by the guide member 26 while being conical with the guide member 26.
It is drawn out of the nozzle 20 through the gap between the nozzle 20 and the nozzle 20. The guide member 26 is for increasing the bulkiness imparting efficiency by sufficiently exposing the yarn Y to compressed air. And, in this heber line nozzle, a needle or a venturi member is not required by adopting such an oblique injection type configuration, thereby extending a cleaning cycle.

However, in the case of such an oblique injection type nozzle, there is a drawback that the efficiency of imparting bulkiness is lower than that of the above-described Taslan nozzle and the like, and the efficiency of imparting bulkiness in such an oblique injection type nozzle is low. The development of a nozzle with a high pressure was desired.

(Object of the Invention) The present invention is intended to overcome the above-mentioned problems in the prior art, and makes use of the characteristic of the oblique injection type nozzle that the clogging is small, and at the same time, is a yarn processing nozzle having a high efficiency of imparting the bulkiness of the yarn. The purpose is to provide.

(Means for Achieving the Object) In order to achieve the above-described object, the yarn processing nozzle according to the present invention has a yarn guiding path through which a yarn is inserted, and the yarn processing nozzle with respect to the yarn in the yarn guiding path. A yarn processing nozzle for injecting a pressurized fluid from an oblique direction to apply a propulsive force to the yarn, and to impart bulkiness to the yarn by the injection force of the pressurized fluid, And (B) a pressurized fluid injection hole for injecting the pressurized fluid into the yarn guide path, and an axial center of the pressurized fluid injection hole. In the direction of the long axis of the ellipse of the yarn introduction path.

That is, in the conventional oblique injection type nozzle, as shown in FIG. 22, focusing on the fact that the cross-sectional shape of the yarn introduction path 28 is circular, the pressurized fluid injected from the pressurized fluid injection hole 29 is It does not become a symmetrical flow, and the flow in the cross section is a deviated flow that is deviated leftward or rightward. Also in this flow, when subjecting the yarn to be also referred to as a disturbance, drift becomes to be further promoted, will have a rotating flow component as shown in the figure S _0. As described above, when the pressurized fluid has a large amount of the rotational flow component, the entire yarn Y becomes the yarn introduction path as shown by S in the figure.
The filament which rotates within 28 and forms the yarn Y is not sufficiently opened. As a result, conventionally, the efficiency of imparting bulkiness is low.

Thus, in the present invention, the cross-sectional shape of the yarn guide path 28 and
The rotation direction is prevented by improving the arrangement direction of the pressurized fluid injection holes 29.

(Embodiment) A. Configuration and Operation of Embodiment FIG. 1 is a longitudinal sectional view of a yarn processing nozzle according to an embodiment of the present invention, and FIG. 2 is a plan view of the nozzle.
3 (a) and 3 (b) are B-
It is a B, CC sectional view. Hereinafter, the configuration and operation of this embodiment will be described with reference to these drawings.

In these figures, the thread processing nozzle 30 is formed by providing a nozzle head 32 on the upper surface of a substantially cylindrical nozzle assembly 31. Of these, the nozzle assembly 31 has a cylindrical housing 33 formed of metal.
The housing 33 has a center hole 34 having a circular cross section along the axis thereof. This center hole
A cylindrical nozzle body 35 is inserted into 34, and the nozzle body 35 is sealed by an O-ring 36.

Inside the nozzle body 35, a yarn guide path 37 passes along the axial direction thereof, and a portion of the yarn guide path 37 existing in the nozzle body 35 has an oblong cross-sectional shape. It is a through hole. As shown in FIG. 4, the ellipse as the cross-sectional shape is an ellipse having a shape in which two semicircles 38 having a radius r are connected to two opposing sides of a rectangle 39. The length a in the direction is, for example, 1.6 mm, and the length b in the short axis direction is, for example, 1.2 mm.

As shown in FIG. 1, a gas injection hole 40 for injecting compressed air as pressurized fluid into the yarn introduction path 37 is provided in the middle of the yarn introduction path 37 in the axial direction of the yarn introduction path 37. And in an oblique direction having an angle θ with respect to. However, FIG. 3 (b)
1, the axial direction of the gas injection holes 40 is substantially the same as the major axis direction α of the cross section of the yarn introduction path 37. This gas injection hole
The arrangement direction of 40 will be described in more detail with reference to FIG. 16 .As described above, the present invention provides the inner wall surface shape of the yarn introduction path 37 against which the compressed air injected from the gas injection holes 40 collides, that is, the transverse direction. Although the surface shape has one feature, there are a plurality of traveling directions of the compressed air colliding with the inner wall surface as indicated by a broken line arrow L. However, in the present invention, it is only necessary that the direction substantially coincides with the direction of the long axis α among the plurality of traveling directions. Accordingly, the gas injection hole 40 has an axial direction substantially the same as the long-axis direction α of the cross section of the yarn introduction path 37, and an axial direction P of the yarn introduction path 37 (FIG. 1). Is provided in such a direction as to be oblique. The diameter φ (FIG. 3 (b)) of the gas injection hole 40 is not particularly limited, but in this embodiment, the length b in the short-axis direction of the cross section of the yarn introduction path 37 is used.
It has the same diameter as.

The nozzle body 35 may be formed of a single kind of metal or alloy, but if a material having high abrasion resistance (such as chromium) is plated or coated on the wall surface of the yarn guide path 37, it will be described later. The abrasion resistance due to the movement of the yarn is significantly improved. Also, wear resistance can be similarly improved by using ceramics such as alumina and silicon nitride, and super-hard materials such as tungsten carbide.

On the other hand, a compressed air supply hole 41 is formed in the side surface of the housing 33 in FIG. 1, and this compressed air supply hole 41 communicates with an air chamber 42 provided so as to surround the nozzle body 35. I have. The gas chamber 42 is provided with the gas injection holes 40 of the nozzle body 35.
Also communicates with. Therefore, when compressed air is supplied from the outside through the compressed air supply hole 41, the compressed air is buffered in the air chamber 42 and then injected obliquely into the yarn guide path 37 through the gas injection hole 40. Will be.

The nozzle head 32 connected to the upper surface of the nozzle assembly 31 by the setting screw 43 has compressed air and the yarn Y.
An ejection guide hole 44 is provided as an outlet side portion of the yarn introduction path 37 for ejecting the air from the nozzle 30 to the outside.
The injection guide hole 44 is a hole having a circular cross section, and the diameter of the portion 45 on the nozzle body 37 side is the same as the length a of the long axis of the cross section of the yarn introduction path 37. Also, this injection guide hole
Reference numeral 44 denotes a trumpet shape which spreads in a curved surface toward the nozzle opening 46, and a wall surface 47 thereof is a radius surface having a radius R. The nozzle head 32 is made of metal, Al ₂ O
It can be formed by a ceramic such as ₃ .

Next, the operation of this embodiment having the above configuration will be described. Also in this embodiment, similarly to the conventional oblique injection type nozzle, the yarn Y composed of a plurality of filaments is inserted from the yarn introduction port 48 side of the yarn introduction path 37. The yarn Y is guided to the outside of the nozzle 30 through the yarn guiding path 37 and is taken in a direction perpendicular to the axial direction of the yarn guiding path 37.

On the other hand, when compressed air is supplied to the nozzle 30 from outside via the compressed air supply hole 41, the compressed air is
It is injected into the yarn guide 37 through 40. As a result, a propulsive force is applied to the yarn Y in the upward direction in FIG.
Violently and randomly moving the filaments that form the filaments, thereby causing the filaments to entangle and form loops. At this time, of the yarn introduction path 37, the cross section of a portion existing in the nozzle body 37 is formed into an oval, and
Since the compressed air is injected along the long axis direction, the flow of the compressed air does not become a rotating flow, for example, as shown by an arrow T in FIG. 5, becomes a flow having almost no rotating component. . For this reason, the filaments constituting the yarn Y are efficiently repeatedly discretely set with each other, so that the entanglement and the formation of the loop are sufficiently performed.

The yarn Y thus entangled or formed with a loop passes through the ejection guide hole 44 provided in the nozzle head 32 shown in FIG. 1, and is compressed from the ejection guide hole 44. It is taken to the right of the figure while being exposed to air. In this operation, since the ejection guide holes 44 are spread in a curved trumpet shape, the compressed air is smoothly diffused and ejected out of the nozzles. For this reason, the flow of the compressed air given to the yarn Y outside the injection guide hole 44 is smooth,
When this flow hits the yarn Y, the entanglement of the filaments and the like are performed more efficiently.

B. Example of Experimental Data Next, the results of experimental verification of the performance of imparting bulkiness according to this example are shown. This experiment was performed for two types of tests: an overfeed test and a loop count test.

First, in the overfeed test, as shown in FIG. 6, the yarn Y wound around the spindle 51 is conducted to the yarn processing nozzle 53 via the first feed roller 52. Then, the yarn Y drawn out from the nozzle 53 is taken up by a yarn suction device (suction gun) 55 using compressed air via a second feed roller 54. As described above, the yarn Y derived from the nozzle 53 is taken in a direction perpendicular to the axial direction of the nozzle 53.

In this experiment, by the rotational speed of second feed roller 54 constant, to secure the feeding speed V ₂ of the yarn Y at the position of the second feed roller 54 at a constant value. And
By replacing the nozzle 53 to the various types of rotational speed of change of the first feed roller 52, i.e., to observe the change in the traveling speed V ₁ of the yarn Y at the position of the first feed roller. In this case, it is often such application amount of entanglement in the nozzle 53 as the speed V ₁ is greater. The conditions set during the actual experiment are as follows.

Thread Y: Polyethylene terephthalate, 150 denier, 72
Supply pressure P of compressed air to the filament nozzle 53: P = 5 kg / cm ² G, V ₂ = 300 m / min. The nozzles on which the experiment was conducted are the nozzles of the following examples and comparative examples.

Embodiment Nozzle: A nozzle obtained by removing the nozzle head 32 from the embodiment nozzle shown in FIGS. The cross-sectional view and the plan view are shown in FIGS. 7 (a) and (b), respectively. However, the constants are as follows.

a = 1.6 mm, b = φ = 1.2 mm, θ = 55 ° Comparative Example Nozzle: As shown in FIGS. 9 (a) and 9 (b) as a sectional view and a plan view, respectively, the cross-sectional shape of the yarn guide path 37 Is a circular nozzle, and the nozzle head 32 is not provided. Assuming that the diameter of the cross section of the yarn introduction path 37 is d, the various constants are set as follows.

a = 1.6 mm, φ = 1.2 mm, θ = 55 ° Experimental data obtained under such conditions are shown in Table 1 below. As can be seen from Table 1, the nozzle of the embodiment of the present invention has a traveling speed V _{1 of the} yarn Y that is larger than that of the nozzle of the comparative example.
And the nozzle performance was high. In this case, as shown in FIGS. 1 to 3 and 8, a nozzle head having a trumpet-shaped ejection guide hole 44 is provided.
The effect is further improved by adding 32. However,
The effect varies depending on the size of the trumpet-shaped ejection guide hole 44, and according to experimental data not shown, it has been obtained that R ≧ 1.5b is desirable.

Next, the results of the loop count test will be described. In this test, first, the yarn Y is given bulkiness by the apparatus shown in FIG. That is, in FIG. 10, the yarn Y wound on the spindle 61 passes through the feed roller 62 and is then provided to the water application device 63. Then, after the water is applied by the water applying device 63, the test nozzle 64 applies the bulkiness. The yarn Y thus obtained is taken up by the take-up roller 66 via the feed roller 65. The running speed of the yarn Y at the position of these rollers 62,65,66 respectively V _a, V _b, when the V _c, a relationship of _{V a> V b, V b} > V c between these . In this case, the relaxation rate R _1X of the yarn Y is given by R _1X = [(V _a −V _c ) / V _a ] × 100 (%).

FIG. 11 shows the yarn Y thus provided with bulkiness.
FIG. 5 is a layout view of a device for counting the number of loops of FIG. In FIG. 11, the yarn Y wound around the spindle 71 is given to the fluff counter 73 via the magnet tensor 72,
It is picked up by a yarn suction device 76 via a tension meter 74 and a pick-up roller 75. As shown in FIG. 12, the fluff counter 73 is a device for optically detecting and counting a loop 77 extending outside the core thread portion 76. In this experiment, all loops are counted regardless of the size of the loop 77. Then, the greater the number of loops, the higher the performance of the nozzle.

The data obtained in this way are shown in FIGS. 13A and 13B.
Shown in the figure. Among them, FIG. 13A shows that the yarn Y
Is given bulkiness.

Thread Y: polyethylene terephthalate, triangular cross section, 50 denier, 36 filament, test nozzle 64 (10th
Compressed air supply pressure P: P = 5 kg / cm ² G Speed V _{c at} take-up roller 66: V _c = 300 m / min FIG. 13B shows the yarn Y obtained under the following conditions. Data.

Thread Y: polyethylene terephthalate, circular cross section, 150 denier 3, 72 filaments, pressure P: P = 5 kg / cm ² G Picking speed V _c : V _c = 300 m / min And in either of FIG. 13A and FIG. 13B Also,
Example nozzle of FIG. 1, Hever line nozzle of FIG. 21,
In addition, the experimental results of three types of nozzles of the Taslan nozzle shown in FIG. 19 are shown as a function of the relaxation rate _1X . Further, the compressed air supply amount for each nozzle is as shown in the figure in units of N1 / min.

As can be seen from FIGS. 13A and 13B, it can be seen that the total number of loops is considerably larger in the nozzle of the embodiment according to the present invention than in the conventional nozzle. The air consumption is smaller than that of the Taslan nozzle, and the nozzle is economical and efficient.

C. Modifications By the way, the yarn processing nozzle according to the present invention is not limited to the above-described embodiment, and various modifications are possible. Hereinafter, this modified example will be described.

(1) In the embodiment shown in FIG. 1, the nozzle head 32 and the nozzle body 35 are formed as separate members, and they are connected to each other. In this case, there is an advantage that the manufacture of each member is easy. However, in this case, as shown in FIG. 14 (a), in the yarn introduction path 37, a boundary surface between a part existing in the nozzle body 35 and a part formed as the ejection guide hole 44 is provided. A step 81 is formed along the long axis direction (α direction in the drawing) of the yarn introduction path 37. Then, dirt such as an oil agent and an oligomer easily adheres to the step 81.

On the other hand, in the example shown in FIG. 14B, the nozzle head 32 and the nozzle body 35 are integrally formed, and the yarn introduction path 37 is formed.
Of the injection guide hole from the portion existing in the nozzle body 35
The transition 82 to 44 is smooth. By doing so, the problem of adhesion of dirt on the steps can be solved.

(2) In the embodiment of FIG. 1, as shown in FIG. 15 (a), the diameter φ of the gas injection hole 40 and the length b of the minor axis of the cross section of the yarn introduction path 37
Are the same, but φ <b may be satisfied as shown in FIG.

(3) In order to apply a propulsive force to the yarn Y, the axis of the gas injection hole 40 with respect to the axis P of the yarn introduction path 37 needs to be arranged at an angle smaller than 90 °, and From the viewpoint of performance and production, the range of θ = 15 ° to 80 ° is desirable.

(4) The cross section of the yarn introduction path 37 may be an oval, and its size and detailed shape are not particularly limited. Therefore, as shown in FIG. 17, the ratio of the length of the major axis to the length of the minor axis may be larger than in the above embodiment.

As described above, when the cross-sectional shape of the yarn guide path 37 is made to be an elliptical shape, that is, the collision surface of the inner wall surface of the yarn guide path 37 is formed not as a plane but as a curved surface, and moreover, for injecting the yarn into the yarn guide path. When the axial direction of the pressurized fluid injection hole is provided so as to substantially coincide with the major axis direction of the cross section of the yarn introduction path, as shown by the arrow T in FIG. The compressed air injected into the inside collides with the opposing inner wall surface of the yarn introduction path 37 and then reflects on the opposite inner wall surface side (the gas injection hole 40 side), and is similarly reflected in a zigzag manner. And change its course,
This flow hits the yarn Y to promote the entanglement of the filaments, and has the effect of further increasing the bulkiness.
In addition, the yarn passage 37 having such an oval cross section is connected to the nozzle body.
The forming in 35 is very easy because the cross-sectional shapes on both sides are circular, and is excellent in workability.

(Effects of the Invention) As described above, according to the present invention, the cross-sectional shape of the yarn introduction path of the yarn processing nozzle is formed into an elliptical shape, and the axial direction of the pressurized fluid injection hole is adjusted by the yarn introduction. Since it is arranged so as to coincide with the long axis direction of the cross section of the road, the injection energy of the pressurized fluid injected from the pressurized fluid injection hole acts on the yarn straightly, and the pressurized fluid is fed into the yarn introduction path. The yarn is guided in a zigzag manner in the traveling direction. Accordingly, the yarn is prevented from rotating in the yarn introduction path, is entangled with the yarn, and has a high bulkiness imparting efficiency.

That is, according to the present invention, it is possible to obtain a yarn processing nozzle having a higher efficiency of imparting bulkiness, while taking advantage of the characteristic of the oblique injection type nozzle that has less clogging. Further, since the cross-sectional shape of the yarn guiding path is elliptical, the processing is very easy, and there is an advantage that it is excellent in workability.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention, FIG. 2 is a plan view of the embodiment, and FIG. 3 is a sectional view taken along line AA of FIG.
FIG. 4 is a view showing a cross section, FIG. 4 is an explanatory view of a cross-sectional shape of the yarn guide path in the embodiment, FIG. 5 is an operation explanatory view of the embodiment, FIG. 6 is an arrangement diagram of an overfeed test apparatus, and FIG. FIGS. 8 and 9 are views showing a modification of the embodiment shown in FIG. 1, FIGS. 8 and 9 are views showing a comparative example, FIGS. 10 and 11 are arrangement diagrams of devices used for measuring the number of loops, and FIGS. The figure is an explanatory diagram of the measurement of the number of loops. 13A and 13B are graphs showing measurement results of the number of loops, FIGS. 14 to 17 are diagrams showing a modification of the present invention,
FIG. 18 is an explanatory diagram of a thread loop and entanglement, FIGS. 19 and 20 are diagrams illustrating a Taslan nozzle, FIG. 21 is a diagram illustrating a Heverline nozzle, and FIG. 22 is an operation of a conventional nozzle. FIG. Description of the reference numerals in the drawings 30 …… Thread processing nozzle, 31 …… Nozzle assembly, 32…
... Nozzle head, 35 ... Nozzle body, 37: Yarn path, 40 ...
… Gas injection hole, 44 …… Injection guide hole

Continuation of the front page (56) References JP-A-56-68129 (JP, A) JP-A-55-67029 (JP, A) JP-A-52-21446 (JP, A) , U)

Claims (4)

(57) [Claims] The present invention has a yarn guide path through which a yarn is inserted, and applies a propulsive force to the yarn by injecting a pressurized fluid from an oblique direction to the yarn in the yarn guide path. A yarn processing nozzle for imparting bulkiness to the yarn by a jetting force of a pressurized fluid, wherein (A) the cross-sectional shape of the yarn introduction path is oblong, and (B) the pressure A pressurized fluid injection hole for injecting a fluid into the yarn introduction path, wherein a direction of an axis of the pressurized fluid injection hole is provided in a long axis direction of the ellipse of the yarn introduction path. Characteristic yarn processing nozzle. 2. The yarn processing nozzle for jetting a nozzle body, a pressurized fluid connected to the nozzle body and a pressurized fluid derived from the nozzle body and a yarn to the outside of the yarn processing nozzle. The yarn guide path is formed so as to pass through the nozzle body and the nozzle head, and the yarn guide path is provided at a portion provided in the nozzle head. Including a trumpet-shaped ejection guide hole which spreads out on a curved surface toward the outside of the processing nozzle, a hole diameter of a portion of the ejection guide hole on the nozzle body side is a length of a long axis of the yarn introduction path of the nozzle body. The yarn processing nozzle according to claim 1, wherein the yarn processing nozzle is determined according to: 3. The yarn processing nozzle according to claim 1, wherein said nozzle body and said nozzle head are formed as separate members. 4. The nozzle body and the nozzle head are integrally formed, and a transition portion of the yarn introduction path from the nozzle body to the ejection guide hole has a smooth shape. 3. The yarn processing nozzle according to item 1 or 2.