TWI586859B - Yarn handling device - Google Patents

Description

Yarn processing device

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a yarn processing apparatus for injecting a fluid into a yarn to produce an entanglement, a loop, or the like to impart bulkiness to the yarn.

Conventionally, there has been known a yarn processing apparatus which ejects a fluid from a yarn composed of a filament of a synthetic resin or the like, and generates an entanglement or a loop in the filament to thereby align the yarn. Gives fluffiness.

Patent Literatures 1 and 2 disclose a yarn processing apparatus including a yarn passage, a nozzle, and a spherical collision body, wherein the yarn passage has a yarn introduction portion and a yarn discharge portion, and the nozzle system is provided with a pair An air injection hole for compressing air is injected into the yarn passage; the spherical collision system is disposed to face the yarn discharge portion of the nozzle.

In the yarn processing apparatuses of the above-described Patent Documents 1 and 2, the yarn introduced from the yarn introduction portion is discharged from the yarn discharge portion through the yarn passage through which the air is injected. Here, the air from the yarn discharge portion collides with the spherical collision body and flows along the surface thereof, so that the yarn is multiplied by the flow of the air, and is discharged through the gap between the yarn discharge portion and the collision body. . At this time, the yarn may be looped or entangled in the filament due to the flow of air generated in the yarn discharge portion, and the yarn may be provided with bulkiness.

(Patent Document 1) Japanese Patent Publication No. 2000-514509 (especially, FIG. 5, FIG. 6, and FIG. 8)

(Patent Document 2) Japanese Patent Laid-Open Publication No. 2000-303280

However, in the conventional yarn processing apparatus using the spherical collision body, the fluffing processing may be insufficient, and there is room for further improvement. Therefore, the inventors of the present invention have carefully reviewed the results for the above reasons, and found the following findings: the shape of the collision body has a great influence on the processing performance of the yarn processing apparatus, and can be improved by the shape of the collision body. Processing performance.

It is an object of the present invention to provide a yarn processing apparatus having high yarn processing performance.

The yarn processing device according to the first aspect of the invention includes a cylindrical nozzle having a yarn passage and a fluid ejection hole, wherein the yarn passage includes a yarn introduction portion and a yarn discharge portion, and the fluid ejection The hole system ejects the fluid toward the yarn passage; and the collision body is disposed to face the front end surface of the "tubular nozzle having the discharge port which is the most end side of the yarn discharge portion" In the surface of the collision body that faces the front end surface of the nozzle, the opposing portion of the discharge port is formed in a concave shape.

According to the present invention, since the concave portion is formed by the opposing portion of the collision body facing the discharge port of the nozzle, a large space can be secured between the yarn discharge portion of the nozzle and the collision body, and it is easy to be in the space. Disturbing the flow of fluid. Therefore, it is easy to generate a loop or an entanglement in the filament "discharged from the yarn discharge portion by the intense fluid flow in the space", and the processing property of the yarn is improved. Further, the improvement of the processing property of the yarn means that the processing quality of the same grade or higher can be achieved even if the processing is performed at a yarn speed faster than the conventional one, and the productivity can be improved.

In the yarn processing device according to the second aspect of the invention, the inner surface of the concave portion of the concave body of the collision body is formed by a curved surface.

When the inner surface of the opposing portion of the concave portion of the collision body is a curved surface, since the fluid discharged from the yarn discharge portion together with the yarn flows along the inner surface of the opposite portion in the inner space, the fluid is not easily It is locally retained and it is easier to produce loops or entanglements in the filaments, which improves the processing properties of the yarn.

In the yarn processing device according to the first aspect of the invention, the opposing portion of the collision body has a most concave shape at a central portion thereof.

When the opposing portion of the collision body has the most concave shape at the center portion thereof, the yarn discharged from the yarn discharge portion is concentrated to collide with the innermost deep portion of the concave opposing portion. Thus, by the concentrated collision of the yarn to one of the collision bodies, the subsequent yarn processing (loop formation or entanglement) is stabilized, and the yarn processing property is improved.

In the yarn processing device according to the fourth aspect of the invention, the cross-sectional shape of the opposing portion of the collision body is an arc shape or an elliptical arc shape.

When the cross-sectional shape of the opposing portion of the collision body is an arc shape or an elliptical arc shape, the inner surface of the opposing portion is curved, and the central portion of the opposing portion is the most concave shape. Therefore, as described in the second and third inventions, the fluid is less likely to be locally retained and the loop or the entanglement is likely to occur, and the formation or entanglement of the loop can be stably performed, so that the yarn can be further improved. Processing performance.

In the yarn processing device according to any one of the first to fourth aspects of the invention, the concave portion and the flat portion are formed in the opposing portion of the collision body, and the flat portion is the aforementioned portion including the discharge port. The front end faces of the yarn discharge portions are parallel and surround the aforementioned concave portions.

When the entire opposing portion of the collision body and the discharge port is concave, the end portion thereof has a sharp shape. In this case, the shape of the end portion of the collision body may be uneven, or a minute defect may be generated at the end portion, which may greatly affect the processing of the yarn. Specifically, the tension of the yarn is uneven or causes a pile or the like. However, in the present invention, since the concave portion and the flat portion for surrounding the concave portion are formed in the opposing portion of the collision body, the unevenness of the shape of the end portion of the opposing portion is small, and it is also less likely to occur. Defects, so the processing of the yarn is stable.

In the yarn processing device according to any one of the first to fifth aspects of the present invention, the nozzle holder having the nozzle is provided, and the collision system is attached to the nozzle holder, and the yarn holder is provided with the yarn in the nozzle holder. In the wire guide, the yarn guide guides the yarn "passing out between the yarn discharge portion of the nozzle and the collision body".

In order to stabilize the running of the yarn discharged from the yarn discharge portion of the nozzle, it is preferable to provide the yarn guide on the downstream side of the nozzle. However, since the tension of the yarn varies depending on the position of the yarn guide relative to the nozzle, in order to appropriately set the tension of the yarn when the yarn guide is additionally provided with the yarn processing device, There is a need to further adjust the troublesome operation of the yarn guide relative to the position of the yarn processing device (nozzle) after the yarn processing device is set. In the present invention, since the nozzle holder is provided with the nozzle and the collision body, the yarn guide is further provided, and the nozzle or the collision body and the yarn guide are integrated, so that the yarn processing device is provided The predetermined position automatically determines the position of the yarn guide without the need to adjust the position of the yarn guide.

According to the present invention, since the opposing portion of the collision body facing the discharge port of the nozzle is formed in a concave shape, a large space can be secured between the yarn discharge portion of the nozzle and the collision body, and it is easy to be in the space. Internally disturbs the flow of fluid. Therefore, it is easy to generate a loop or an entanglement of the filament discharged from the yarn discharge portion by the violent fluid flow in the aforementioned space, and to improve the processability of the yarn. Further, the improvement of the processing property of the yarn means that the processing quality of the same grade or higher can be achieved even if the processing is performed at a yarn speed faster than the conventional one, and the productivity can be improved.

Next, an embodiment of the present invention will be described. Fig. 1 is a front view of the yarn processing apparatus of the present embodiment; Fig. 2 is a left side view of the yarn processing apparatus; and Fig. 3 is a schematic view showing a part of the yarn processing apparatus of Fig. 1 in a cross section. Further, Fig. 4(a) is an enlarged view of the nozzle and the collision body shown in Fig. 3, and Fig. 4(b) is a right side view of the collision body of Fig. 4(a). In the following description, the directions of up, down, left, and right in the first and third figures are defined as up, down, left, and right. As shown in FIGS. 1 to 3, the yarn processing apparatus 1 includes a nozzle 2, a nozzle holder 3 that holds the nozzle 2, and a collision body 4 that is provided in the nozzle holder 3.

First, the nozzle 2 will be described. As shown in FIG. 3 and FIG. 4( a ), the nozzle 2 is formed in a tubular shape by a hard material such as metal or ceramic, and a flange portion that bulges in the radial direction is provided at one end portion of the nozzle 2 . 2a. Further, a yarn passage 10 extending in the direction of the cylinder axis of the nozzle 2 is formed inside the nozzle 2. The yarn passage 10 has a yarn introduction portion 11 formed on the flange portion 2a side (right portion) of the nozzle 2, and a yarn formed on the opposite side (left portion) from the flange portion 2a of the nozzle 2. The discharge portion 12; and the air introduction portion 13 that connects the yarn introduction portion 11 and the yarn discharge portion 12.

An introduction port 11a through which the yarn 31 can be introduced is formed in an end surface of the flange portion 2a located at the right end portion of the nozzle 2, and the yarn introduction portion 11 is formed from the introduction port 11a toward the front end side (left side in the drawing) ) The narrower the inner diameter, the more pointed. On the other hand, a discharge port 12a through which the yarn 31 introduced into the yarn passage 10 is discharged is provided on the left end surface of the nozzle 2 opposite to the flange portion 2a, and the yarn discharge portion 12 is attached. The shape of the tail width is increased as the inner diameter is increased toward the discharge port 12a. The shape of the yarn introducing portion 11 of the pointed end or the yarn discharging portion 12 of the tail width can be, for example, a push-out shape or a flared shape in which the degree of expansion (curvature) at the open end is larger than the push-out shape. As an example, in the present embodiment, the yarn introduction portion 11 has a flared shape, and the yarn discharge portion 12 has a push-out shape.

In the central portion of the nozzle 2 in the cylinder axis direction, an air injection hole 14 (fluid injection hole) that opens toward the air introduction portion 13 of the yarn passage 10 is provided. Further, although only one air injection hole 14 is shown in Fig. 4(a), a plurality of (for example, three) air injection holes 14 may be disposed at equal intervals in the circumferential direction of the nozzle 2, respectively. Further, the air injection hole 14 extends obliquely toward the front end side (left side) of the yarn passage 10 with respect to the radial direction of the nozzle 2 (direction orthogonal to the yarn passage 10), and is possible to face the yarn passage 10 When the air is injected, a stronger air flow toward the left side is generated.

Next, the nozzle holder 3 will be described. As shown in Figs. 1 to 3, the nozzle holder 3 has a rectangular parallelepiped shape which is slightly longer in the vertical direction. A mounting hole 20 that horizontally penetrates the nozzle holder 3 is formed at an upper side portion of the nozzle holder 3. Further, although the above-described nozzle 2 is inserted into the mounting hole 20, the diameter of the mounting hole 20 is smaller than the outer diameter of the flange portion 2a of the nozzle 2. Therefore, the left end portion of the nozzle 2 can be inserted into the mounting hole 20 from the opening on the right side, and the flange portion 2a provided at the right end portion of the nozzle 2 is not inserted into the mounting hole 20 but is abutted against the nozzle holder. The right side of the 3, whereby the nozzle 2 can be positioned relative to the nozzle holder 3. Further, as shown in FIG. 1, the nozzle holder 3 is attached with a regulating member 22 that prevents the nozzle 2 inserted into the mounting hole 20 from flying toward the right side.

An air supply hole 21 that extends upward and downward is formed inside the nozzle holder 3, and the air supply hole 21 is connected to an air supply source (not shown). Further, when the nozzle 2 is attached to the attachment hole 20 of the nozzle holder 3, the air nozzle hole 14 formed in the nozzle 2 communicates with the air supply hole 21, and the air supplied from the air supply hole 21 can be supplied from the air injection hole 14. Sprayed toward the yarn passage 10.

Next, the collision body 4 will be described. As shown in FIGS. 3 and 4, the collision body 4 has a substantially disk-shaped outer shape and is formed of a hard material such as metal or ceramic. The collision body 4 is opposed to the left end surface of the nozzle 2 attached to the nozzle holder 3 (the front end surface of the yarn discharge portion 12 where the discharge port 12a is formed) with a slight gap therebetween.

Among the right side of the collision body 4 facing the left end surface of the nozzle 2, a central portion facing the discharge port 12a is formed as a recess 4a. The inner surface of the concave portion 4a is formed in an arcuate curved surface in a cross section of a plane including the central axis of the nozzle 2. Further, the recessed portion 4a is surrounded by a flat portion 4b having a flat surface parallel to the front end surface of the yarn discharge portion 12.

In addition, the configuration in which the collision body 4 is held at a position facing the discharge port 12a of the nozzle 2 is not particularly limited. However, in the present embodiment, the following configuration is adopted as an example. First, as shown in Fig. 1, the base member 23 is fixedly attached to the left side surface of the lower portion of the nozzle holder 3 by a bolt or the like, and the mounting base member 23 is connected to the block member so as to be rotatable in the vertical plane. The holder is 24 below. Further, one end of the connecting rod 25 is fixed to the holder 24, and the collision body 4 is fixed to the other end of the connecting rod 25. In this configuration, as shown by the two-dot chain line in FIG. 3, when the holder 24 is rotated with respect to the attachment base member 23, the collision body 4 is also integrally rotated, and the collision body 4 can be spread over the following two positions. The movement is a position facing the discharge port 12a of the nozzle holder (a position indicated by a solid line) and a retracted position (a position indicated by a two-dot chain line) away from the discharge port 12a. Then, by moving the collision body 4 to the retracted position, the threading operation into the nozzle 2 can be easily performed.

Further, in order to stabilize the travel of the yarn 31 discharged from the yarn discharge portion 12 of the nozzle 2, it is preferable to provide a yarn guide on the downstream side of the nozzle 2. However, the tension of the yarn on the downstream side of the nozzle changes with the position of the yarn guide relative to the nozzle 2. Therefore, when the yarn guide is separately provided separately from the yarn processing device 1, in order to appropriately set the tension of the yarn, it is necessary to further adjust the yarn guide after the yarn processing device is provided. The troublesome operation with respect to the position of the yarn processing device 1 (nozzle 2).

Therefore, as shown in FIG. 1 and FIG. 2, in the present embodiment, the attachment base member 23 fixed to the nozzle holder 3 is provided with the yarn discharged from the nozzle 2 through the attachment member 27. Guided yarn guide 26. That is, the nozzle holder 3 provided with the nozzle 2 and the collision body 4 is further provided with the yarn guide 26, and the nozzle 2 or the collision body 4 and the yarn guide 26 are integrally formed. Then, the yarn which is discharged from the right side of the first drawing into the nozzle 2 and discharged from the yarn discharge portion 12 can be oriented via the yarn guide positioned on the front side (the right side in FIG. 2) of the first drawing. Guided above. As described above, by integrally configuring the yarn guide 26 and the nozzle holder 3, the position of the yarn guide 26 can be automatically determined as long as the yarn processing device 1 is set at a predetermined position, and adjustment is not necessary. The position of the yarn guide 26 relative to the nozzle 2.

Next, the action of the yarn processing apparatus 1 of the present embodiment in the case of the fluffing processing will be described. First, as shown in FIG. 1 to FIG. 3, the yarn 31 made of a filament such as synthetic resin can be introduced from the introduction port 11a of the yarn introduction portion 11 provided in the nozzle 2, and the air is introduced into the air introduction portion. 13 guides. Further, the air supplied from the air supply source not shown in the drawing is jetted to the air introduction portion 13 by the air injection hole 14.

The air jetted to the air introduction portion 13 is discharged from the yarn discharge portion 12, and further collides with the collision body 4 disposed to face the discharge port 12a, and the air 31 flows from the collision body 4 and The gap between the yarn discharge portions 12 is discharged. At this time, the constituent filaments of the yarn 31 can be cleaved by the intense air flow in the yarn discharge portion 12, thereby generating loops or entanglement by the violent movement of the respective filaments, thereby Line 31 provides bulkiness.

Here, in the yarn processing apparatus 1 of the present embodiment, the concave portion 4a is formed on the surface of the collision body 4 facing the discharge port 12a. Therefore, a large space can be secured between the yarn discharge portion 12 of the nozzle 2 and the collision body 4, and the flow of the air is easily disturbed in the space. Therefore, since it is easy to generate a loop or an entanglement of the filament discharged from the yarn discharge portion 12 by the intense air flow, the processing property of the yarn can be improved. Moreover, the improvement of the processability of the yarn processing apparatus 1 means that even if it is processed at a yarn speed faster than the conventional one, the processing quality equivalent to the conventional one can be obtained, the productivity can be improved, and the processing can be reduced. The amount of air required for a yarn per unit length.

Further, in the present embodiment, the concave portion 4a of the collision body 4 is formed by a continuous curved surface having a circular arc shape. When the concave portion 4a is formed by a curved surface, since the air discharged from the yarn discharge portion 12 together with the yarn flows along the inner surface of the space in the concave portion 4a, the air is less likely to be locally retained, and more It is easy to create a loop or entanglement in the filament. Further, the concave portion 4a having an arcuate cross section is formed in a central portion (a position at which the central axis of the nozzle 2 can pass), and the yarn discharged from the yarn discharge portion 12 is concentratedly collided. In the innermost part of the recess 4a. In this way, by the concentrated collision of the yarn to one of the collision bodies 4, the subsequent yarn processing (loop formation or entanglement) can be stably performed, and the processing property of the yarn can be improved.

Further, in the present embodiment, the concave portion 4a and the flat portion 4b for surrounding the concave portion are provided in the opposing portion of the collision body 4 and the discharge port 12a. In this case, the entire opposing portion of the collision body 4 is formed in a concave shape, and the end portion (outer peripheral portion) is sharp (the fifth embodiment (e) of the modification described later). The unevenness of the shape of the end portion (outer peripheral portion) of the opposing portion of the collision body 4 is small, and defects are not easily generated, so that the processing of the yarn can be stably performed. Further, when the outer diameter of the collision body 4 is D, the diameter of the concave portion 4a is d, and when the width of the flat portion 4b is t, it becomes D=d+2t, but the flat portion 4b is The width t is preferably determined to be in the range of 0 ≦ t ≦ 5 (mm).

The present invention is not limited to the embodiments described above, and may be modified as appropriate, and may be modified as appropriate without departing from the scope of the invention.

1] The concave shape of the "opposing portion of the discharge port 12a of the nozzle 2" of the collision body 4 is not limited to the cross-sectional arc shape of the above embodiment. For example, as shown in Fig. 5, (a) an elliptical arc shape, (b) a pan bottom shape, (c) a trapezoidal shape, (d) a conical shape, or the like may be employed as the cross-sectional shape of the concave portion 4a.

Further, in the fifth (a) to (d) of FIG. 5, the elliptical arc-shaped recessed portion 4a of (a) is the same as the arcuate recessed portion of the above-described embodiment (see Fig. 4), and the inner surface thereof is The curved surface is formed, so the air flows along its inner surface without being easily localized, and it is easy to generate a loop or entanglement in the yarn. Further, in the elliptical arc shape of (a) and the conical shape of (d), since the center portion is most recessed, the yarn is concentratedly collided into the innermost deep portion of the collision body, whereby the subsequent yarn can be stably performed. Line processing.

Further, as in the fourth embodiment of the above-described embodiment, the recessed portion 4a is provided only on a part of the surface of the collision body 4 on the side of the discharge port 12a, and the periphery of the recessed portion 4a does not necessarily need to be surrounded by the flat portion 4b, and as shown in Fig. 5 (e) In general, the entire surface of the collision body 4 on the discharge port 12a side may be configured as a recess 4a.

2] The nozzle 2 is not limited to the shape of the fourth embodiment (a) of the above embodiment. For example, as shown in Fig. 6(a), the yarn introduction portion 11 may be in a push-out shape, and the yarn discharge portion 12 may have a flared shape. Alternatively, as shown in Fig. 6(b), the yarn introduction portion 11 may have a straight shape in which the diameter does not change.

3] Although the collision body 4 is configured to be movable (rotated) with respect to the nozzle holder 3 in the above embodiment, the collision body 4 may be fixed to the nozzle holder 3.

[Examples]

Next, a specific embodiment of the present invention will be described in comparison with a comparative example.

(1) Specifications of nozzles and collision bodies

The four types of nozzle specifications used in the examples and comparative examples are shown in Table 1, and the six types of nozzle specifications are shown in Table 2. Further, a combination of these nozzles and collision bodies is shown in Fig. 7.

[Table 1]

[Table 2]

No. 1 nozzle and No. 2 nozzle of Table 1 are nozzles shown by (1) on the left side of Fig. 7. Further, the No. 3 nozzle and the No. 4 nozzle in Table 1 are nozzles shown in (2) on the left side of Fig. 7. However, as shown in Table 1, in the No. 1 nozzle and the No. 2 nozzle, the diameters of the air injection holes are different, and there are some variations in the range of the applicable yarn thickness (No. 1 nozzle is a fine yarn) For the wire, the No. 2 nozzle is used for thick yarn). The same applies to the No. 3 nozzle and the No. 4 nozzle.

Further, as shown in Table 2, in the case of the collision body, a collision type (Cup) of three types which are used in the embodiment of the present invention, which is a concave portion of the nozzle and the opposite portion of the discharge port, is used as a comparative example. There are six types of a total of two kinds of spherical collision bodies (Ball) and one type of flat collision type (Plate). In Fig. 7, (a) and (e) are spherical collision bodies of 13 mm, (b) and (f) are spherical collision bodies of 6 mm, and (c) and (g) are flat collision bodies, ( d) and (h) are concave collision bodies of the present invention. Moreover, all six types of collision bodies are made of ceramics.

(2) Comparison of processing performance due to the difference in shape of the collision body

The review of the processing performance of the yarn processing device due to the difference in the shape of the collision body was reviewed. That is, the nozzles of Table 1 and the collision body of Table 2 were combined, and the material of the yarn and the thickness of the yarn were changed and experiments were respectively carried out, and the yarn on the downstream side (discharge side) of the nozzle was measured for each experimental example. tension.

Here, the core yarn and the pattern yarn are processed by supplying a core yarn and an effect yarn to the nozzles at different supply speeds and processing them. Further, the yarn speed (discharge side yarn speed) on the downstream side of the nozzle was changed in four stages, and "the excess feed amount to the respective core yarn and the pattern yarn (the amount of supply yarn to the nozzle ( The yarn tension (unit: gr) on the discharge side at the time of "fixed time" of the supply-side yarn speed) with respect to the discharge yarn amount (discharge-side yarn speed). The yarn tension measurement results on the discharge side of the polyester yarn (PET) and the yarn thicknesses of 150 denier, 300 denier, 600 denier and 750 denier are shown in Tables 3 to 6. . Further, the results of the yarn tension on the discharge side in the case where the yarn thickness of the nylon yarn (PA6) was 140 d are shown in Table 7. In addition, in Tables 3 to 7, the nozzles corresponding to the yarn thickness are appropriately selected from among the nozzles of the four types of Table 1.

[table 3] (Yarn type) Material: PET, yarn thickness: 75d/72f×2=150d

[Table 4] (Yarn type) Material: PET, yarn thickness: 150d/48f×2=300d

[table 5] (Yarn type) Material: PET, yarn thickness: 150d/48f×4=600d

[Table 6] (Yarn type) Material: PET, yarn thickness: 150d/48f×5=750d

[Table 7] (Yarn type) Material: PA6, yarn thickness: 70d/48f×2=140d

In general, it can be understood that the higher the yarn tension on the discharge side, the stronger the entanglement of the yarn. In other words, it can be judged that the higher the yarn tension on the discharge side, the more excellent the processing can be obtained. This point is shown in Tables 3 to 7. Regardless of the material of the yarn, the thickness of the yarn, and the type of the nozzle, in the case of using the concave collision body (Cut) of the present invention, and the use thereof In the case of a spherical collision body or a plate-shaped collision body (Plate), the yarn tension on the discharge side is higher than that of the comparative example. In other words, it can be understood that the processing performance of the yarn of the yarn processing apparatus can be considerably improved by using the concave collision body.

Further, it can be understood from Tables 3 to 7 that generally, the lower the yarn speed, the higher the yarn tension on the discharge side, and the processing of the yarn tends to be excellent. In this regard, when a spherical collision body or a flat collision body is used, it is necessary to reduce the yarn speed when it is desired to achieve a certain processing quality (a certain or more yarn tension), but by using this The concave colloidal body of the invention can produce a yarn of a quality equal to or higher than that of a spherical or flat plate at a faster yarn speed, and can greatly improve productivity.

For example, in Table 5, it can be understood that a spherical collision or a plate-like collision body (Plate) reduces the yarn speed to a low speed of 350 m/min and barely reaches a tension of 11 gram; In the case of a collision, it is possible to achieve a tension of more than 11 gram even when the yarn speed is increased to 500 m/min, and it is possible to obtain a quality equal to or higher than that of a spherical collision body or a flat collision body at a low speed.

(3) The diameter of the concave portion of the concave collision body

Next, the processing performance of the yarn when the diameter of the concave portion of the concave collision body (dimension d shown in Fig. 7) was changed was examined. Here, experiments were carried out using three types of collision bodies having a recess diameter of 11 mm, 20 mm, and 24 mm shown in Table 2 and a flat collision body as a comparative example, and changing the thickness of the yarn. The yarn tension measurement results on the discharge side when the material of the yarn was PET and the yarn thicknesses were 150 denier, 300 denier, and 600 denier were shown in Tables 8 to 10.

[Table 8] (Yarn type) Material: PET, yarn thickness: 75d/72f×2=150d

[Table 9] (Yarn type) Material: PET, yarn thickness: 150d/48f×2=300d

[Table 10] (Yarn type) Material: PET, yarn thickness: 150d/48f×4=600d

As shown in Tables 8 to 10, regardless of the thickness of the yarn and the type of the nozzle, the diameter of the concave portion is in the range of 11 mm to 24 mm, and the yarn tension is changed as compared with the case of using the collision body in the form of a flat plate. High and improve processing performance.

Further, when the concave portion of the collision body is formed to be extremely small or extremely large with respect to the diameter of the opposing discharge port, the effect of improving the workability can be considered to be small. In this regard, in Tables 8 to 10, the parameter of the dimensionlessness of the ratio of the discharge port diameter (K) of the nozzle to the diameter (d) of the concave portion of the collision body (ε=K/d) has been described, and at least It is understood that the processing performance is improved in the range of ε of 0.25 to 1.18.

1. . . Yarn processing device

2‧‧‧ nozzle

2a‧‧‧Flange

3‧‧‧ nozzle holder

4‧‧‧ Collision body

4a‧‧‧ recess

4b‧‧‧flat

10‧‧‧Yarn path

11‧‧‧Yarn introduction department

11a‧‧‧Import

12‧‧‧Yarn discharge department

12a‧‧‧Export

13‧‧‧Air introduction department

14‧‧‧Air jet hole

20‧‧‧Installation holes

21‧‧‧Air supply hole

22‧‧‧Restricted components

23‧‧‧Installing base member

24‧‧‧Holding

25‧‧‧Links

26‧‧‧Yarn guides

31‧‧‧Yarn

Fig. 1 is a front view of a yarn processing apparatus according to an embodiment of the present invention.

Fig. 2 is a left side view of the yarn processing apparatus of Fig. 1.

Fig. 3 is a schematic view showing a part of the yarn processing apparatus of Fig. 1 in a cross section.

Fig. 4(a) is an enlarged view of the nozzle and the collision body shown in Fig. 3, and Fig. 4(b) is a right side view of the collision body of Fig. 4(a).

Fig. 5 (a) to (e) are cross-sectional views of the collision body in a modified form.

Fig. 6 (a) and (b) are cross-sectional views showing a nozzle and a collision body of another modification.

Fig. 7 (a) to (h) are schematic views showing nozzles and collision bodies used in the examples and comparative examples.

1. . . Yarn processing device

2. . . nozzle

2a. . . Flange

3. . . Nozzle holder

4. . . Collision body

4a. . . Concave

10. . . Yarn access

11. . . Yarn introduction

11a. . . Guide

12. . . Yarn discharge

12a. . . Discharge

13. . . Air introduction

14. . . Air injection hole

20. . . Mounting holes

twenty one. . . Air supply hole

twenty two. . . Restricting member

twenty three. . . Mounting base member

twenty four. . . Holder

25. . . Link rod

Claims (6)

A yarn processing device comprising: a cylindrical nozzle having a yarn passage and a fluid injection hole, wherein the yarn passage includes a yarn introduction portion and a yarn discharge portion, the fluid injection hole is oriented The yarn passage ejecting fluid; and the collision body disposed to face the front end surface of the center line orthogonal to the cylindrical nozzle, wherein the cylindrical nozzle is formed in the yarn discharge portion The discharge port is located at the end side, and the opposing portion of the collision body and the front end surface of the nozzle is formed in a concave shape. The yarn processing device according to claim 1, wherein the inner surface of the concave portion of the concave body of the collision body is formed by a curved surface. The yarn processing device according to claim 1 or 2, wherein the opposing portion of the collision body is formed in a most concave shape at a central portion thereof. The yarn processing device according to claim 1, wherein the cross-sectional shape of the opposing portion of the collision body is an arc shape or an elliptical arc shape. The yarn processing device according to claim 1 or 2, wherein a concave portion and a flat portion are formed in the opposing portion of the collision body, and the flat portion is discharged from the yarn including the discharge port The front end faces are parallel and surround the aforementioned recesses. A yarn processing apparatus according to claim 1 or 2, Wherein, a nozzle holder for holding the nozzle is provided, and the collision system is attached to the nozzle holder, and the nozzle holder is provided with a yarn guide that guides the yarn discharge portion passing through the nozzle a yarn that comes out of the collision body.