WO2012049924A1

WO2012049924A1 - Yarn processing device

Info

Publication number: WO2012049924A1
Application number: PCT/JP2011/070376
Authority: WO
Inventors: 實國永; 昭夫溝俣
Original assignee: 有限会社Ｊｔｃ; 株式会社Ａｉｋｉリオテック
Priority date: 2010-10-15
Filing date: 2011-09-07
Publication date: 2012-04-19
Also published as: TWI586859B; KR101606376B1; EP2628830B1; KR20140010365A; JP5754817B2; TW201229342A; EP2628830A1; EP2628830A4; JPWO2012049924A1

Abstract

A yarn processing device having high yarn processing performance is provided. The yarn processing device (1) is provided with a yarn passage (10) provided with a yarn introduction section (11) and a yarn ejection section (12); a nozzle (2) having an air injection hole (14) that injects air into the yarn passage (10); and a collision body (4) facing an outlet (12a) positioned at the leading edge of the yarn ejection section (12). The part of the collision body facing the outlet (12a) is formed in a concave shape.

Description

Yarn processing device

The present invention relates to a yarn processing apparatus that imparts bulkiness to a yarn by injecting a fluid onto the yarn to cause entanglement or a loop.

Conventionally, a yarn processing apparatus that imparts bulkiness to a yarn by injecting a fluid onto a yarn made of a filament such as a synthetic resin to cause entanglement or a loop in the filament is known.

In

Patent Documents

1 and 2, a yarn passage having a yarn introduction portion and a yarn discharge portion, a nozzle having an air injection hole for injecting compressed air into the yarn passage, and a yarn discharge portion of the nozzle are opposed to each other. A yarn processing device is disclosed, each of which includes a spherical impactor disposed on the surface.

In the yarn processing apparatuses disclosed in

Patent Documents

1 and 2, the yarn introduced from the yarn introduction portion passes through the yarn passage through which air is injected and is discharged from the yarn discharge portion. Here, the air discharged from the yarn discharge section collides with the spherical collision body and flows along the surface thereof, and rides on the air flow, and the yarn passes through the gap between the yarn discharge section and the collision body. Discharged. At that time, a loop or entanglement occurs in the filament due to the air flow generated in the yarn discharge portion, thereby imparting bulkiness to the yarn.

JP 2000-514509 A (particularly FIGS. 5, 6, and 8) JP 2000-303280 A

However, in the conventional yarn processing apparatus using a spherical collision body, the bulky processing may be insufficient, and there is room for further improvement. Therefore, as a result of intensive studies to elucidate the above cause, the inventors of the present application have greatly affected the processing performance of the yarn processing apparatus, and the processing performance is devised by devising the shape of the collision body. Has been found to improve.

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

A yarn processing apparatus according to a first aspect of the present invention includes a nozzle having a yarn passage having a yarn introduction portion and a yarn discharge portion, a fluid injection hole for injecting a fluid into the yarn passage, and a discharge port of the yarn discharge portion. A collision body having a surface opposed to the front end surface with a gap, and a portion of the collision body that faces the front end surface of the yarn discharge portion is opposed to the discharge port. It is characterized by being formed.

According to the present invention, since the facing portion of the collision body that faces the discharge port of the nozzle is formed in a concave shape, a large space is secured between the yarn discharge section of the nozzle and the collision body, The fluid flow is likely to be disturbed. Therefore, loops and entanglement are likely to occur in the filament discharged from the yarn discharge section due to the intense fluid flow in the space, and the processing performance of the yarn is improved. In addition, the improvement in yarn processing performance means that even if the yarn is processed at a higher yarn speed than before, it is possible to realize the same or higher processing quality, and it can be said that the productivity is improved.

A yarn processing apparatus according to a second invention is characterized in that, in the first invention, the concave inner surface of the collision body is formed with a curved surface.

When the inner surface of the concave facing portion of the collision body is a curved surface, the fluid discharged together with the yarn from the yarn discharging portion flows along the inner surface in the inner space of the facing portion, so that it is difficult for the fluid to stay locally. Further, loops and entanglement are more likely to occur in the filament, and the processing performance of the yarn is improved.

The yarn processing apparatus according to a third aspect of the present invention is the yarn processing apparatus according to the first or second aspect, wherein the facing portion of the collision body is formed in a most recessed shape at a central portion thereof. .

If the opposing part of the colliding body has the most concave shape at the center, the yarn discharged from the yarn discharging part is converged and collides with the innermost part of the concave opposing part. As described above, the yarn is concentrated and collided at one location of the collision body, so that the subsequent yarn processing (loop formation or entanglement) is stabilized, and the processing performance of the yarn is improved.

A yarn processing apparatus according to a fourth invention is characterized in that, in the first invention, a cross-sectional shape of the facing portion of the collision body is an arc shape or an elliptic arc shape.

When the cross-sectional shape of the facing portion of the colliding body is an arc or an elliptical arc, the inner surface of the facing portion is a curved surface and the most concave shape is in the center of the facing portion. Therefore, as described in the second and third inventions, the fluid is less likely to stay locally and the loop or entanglement is likely to occur, and the formation and entanglement of the loop is performed stably. Processing performance is further improved.

The yarn processing apparatus according to a fifth aspect of the present invention is the material processing apparatus according to any one of the first to fourth aspects of the invention, wherein the opposing portion of the collision body has a recess and a front end surface of the yarn discharge portion including the discharge port. And the flat part surrounding the said recessed part is formed, It is characterized by the above-mentioned.

If the entire portion of the colliding body facing the discharge port is concave, the end of the collider will have a sharp shape. In this case, variations in the shape of the end portion may occur in the collision body, or a minute chip may occur in the end portion, which greatly affects the processing of the yarn. Specifically, it causes thread tension variation and fluff generation. However, in the present invention, since the concave portion and the flat portion are provided so as to surround the concave portion in the facing portion of the collision body, the variation in the end portion shape of the facing portion is small, and chipping is not easily generated. , Yarn processing is stable.

According to a sixth aspect of the present invention, there is provided the yarn processing apparatus according to any one of the first to fifth aspects, further comprising a nozzle holder for holding the nozzle, wherein the collision body is attached to the nozzle holder, and the nozzle holder Is provided with a yarn guide that guides the yarn that has passed through 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 a yarn guide on the downstream side of the nozzle. However, since the tension of the thread changes depending on the position of the thread guide with respect to the nozzle, when the thread guide is provided separately from the thread processing apparatus, in order to appropriately set the thread tension, after installing the thread processing apparatus, Furthermore, the troublesome work of adjusting the position of the yarn guide relative to the yarn processing device (nozzle) is required. In the present invention, since the nozzle holder provided with the nozzle and the collision body is further provided with a thread guide, and the nozzle and the collision body are integrated with the thread guide, the thread processing device is installed at a predetermined position. By simply doing this, the position of the thread guide is automatically determined, and there is no need to adjust the position of the thread guide.

It is a front view of the yarn processing apparatus which concerns on embodiment of this invention. It is a left view of the yarn processing apparatus of FIG. It is the figure which showed a part of thread | yarn processing apparatus of FIG. 1 in the cross section. (A) is an enlarged view of the nozzle and the collision body shown in FIG. 3, and (b) is a right side view of the collision body of (a). It is sectional drawing of the collision body of a change form. It is sectional drawing of the nozzle and collision body of another modified form. It is a figure which shows the nozzle and collision body which were used by the Example and the comparative example.

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 cross-sectional view of a part of the yarn processing apparatus of FIG. 4A is an enlarged view of the nozzle and the collision body shown in FIG. 3, and FIG. 4B is a right side view of the collision body of FIG. In the following description, the vertical and horizontal directions in FIGS. 1 and 3 are defined as vertical and horizontal directions. 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 provided on the nozzle holder 3.

First, the nozzle 2 will be described. As shown in FIGS. 3 and 4A, the nozzle 2 is formed in a cylindrical shape from a hard material such as metal or ceramics, and a flange portion 2a projecting in the radial direction is provided at one end portion of the nozzle 2. Yes. Further, a thread passage 10 extending in the cylinder axis direction of the nozzle 2 is formed inside the nozzle 2. The yarn passage 10 includes a yarn introduction portion 11 formed on the flange portion 2a side (right side portion) of the nozzle 2, a yarn discharge portion 12 formed on the opposite side (left portion) of the flange portion 2a of the nozzle 2, and a yarn An air introduction portion 13 that connects the introduction portion 11 and the yarn discharge portion 12 is provided.

An introduction port 11a through which the yarn 31 is introduced is opened at the end surface of the flange portion 2a located at the right end portion of the nozzle 2, and the yarn introduction portion 11 is directed from the introduction port 11a to the tip side (left side in the figure). It is formed in a tapered shape whose inner diameter decreases. On the other hand, a discharge port 12a through which the yarn 31 introduced into the yarn passage 10 is discharged is opened on the left end surface of the nozzle 2 on the side opposite to the flange portion 2a, and the yarn discharge unit 12 is connected to the discharge port 12a. It is formed in a divergent shape whose inner diameter increases as it goes. As the shape of the tapered yarn introduction portion 11 or the end-widening yarn discharge portion 12, for example, a tapered shape or a trumpet shape having a larger extent (curvature) at the opening end than the tapered shape can be adopted. As an example, in the present embodiment, the yarn introduction portion 11 has a trumpet shape, and the yarn discharge portion 12 has a taper shape.

The air injection hole 14 (fluid injection hole) opened to the air introduction part 13 of the yarn passage 10 is provided in the central part of the nozzle 2 in the cylinder axis direction. In FIG. 4A, only one air injection hole 14 is shown, but in reality, a plurality (for example, three) of air injection holes 14 are arranged at equal intervals in the circumferential direction of the nozzle 2, respectively. Yes. The air injection hole 14 extends obliquely toward the distal end side (left side) of the yarn passage 10 with respect to the radial direction of the nozzle 2 (the direction orthogonal to the yarn passage 10), and injects air into the yarn passage 10. When this happens, a strong air flow toward the left can be generated.

Next, the nozzle holder 3 will be described. As shown in FIGS. 1 to 3, the nozzle holder 3 is formed in a rectangular parallelepiped shape that is slightly longer in the vertical direction. A mounting hole 20 that horizontally penetrates the nozzle holder 3 is formed in the upper portion of the nozzle holder 3. The nozzle 2 described above is inserted into the mounting hole 20, but the diameter of the mounting hole 20 is smaller than the outer diameter of the flange portion 2 a of the nozzle 2. Therefore, the left end portion of the nozzle 2 is inserted into and attached to the mounting hole 20 from the right opening, while the flange portion 2 a provided at the right end portion of the nozzle 2 is not inserted into the mounting hole 20 and the right side surface of the nozzle holder 3. Thus, the nozzle 2 is positioned with respect to the nozzle holder 3. As shown in FIG. 1, a restriction member 22 that prevents the nozzle 2 inserted into the mounting hole 20 from popping out to the right is attached to the nozzle holder 3.

An air supply hole 21 extending in the vertical direction is formed inside the nozzle holder 3, and the air supply hole 21 is connected to an air supply source (not shown). When the nozzle 2 is mounted in the mounting hole 20 of the nozzle holder 3, the air injection hole 14 formed in the nozzle 2 communicates with the air supply hole 21, and the air supplied from the air supply hole 21 is air injection. It is injected from the hole 14 into the yarn passage 10.

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

A concave portion 4a is formed in the central portion of the colliding body 4 facing the discharge port 12a on the right surface facing the left end surface of the nozzle 2. The inner surface of the recess 4 a has a circular arc-shaped cross section in a plane including the central axis of the nozzle 2. Further, the concave portion 4 a is surrounded by a flat portion 4 b having a flat surface parallel to the tip surface of the yarn discharge portion 12.

In addition, although the structure which hold | maintains the collision body 4 in the position facing the discharge port 12a of the nozzle 2 is not specifically limited, In this embodiment, the following structures are employ | adopted as an example. First, as shown in FIG. 1, a mounting base member 23 is fixed to the lower left side surface of the nozzle holder 3 with a bolt or the like, and the lower portion of the block-shaped holder 24 is rotatable on the mounting base member 23 in a vertical plane. It is connected. Further, one end of a 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 a two-dot chain line in FIG. 3, when the holder 24 rotates with respect to the mounting base member 23, the collision body 4 also rotates integrally. It can move over a position facing the discharge port 12a (a position indicated by a solid line) and a retreat 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, threading into the nozzle 2 can be easily performed.

In addition, in order to stabilize the running of the yarn 31 after being discharged from the yarn discharging 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 downstream of the nozzle changes depending on the position of the yarn guide with respect to the nozzle 2. Therefore, when a yarn guide is provided separately from the yarn processing device 1, in order to appropriately set the yarn tension, after the yarn processing device is installed, the yarn guide with respect to the yarn processing device 1 (nozzle 2) is further provided. The troublesome work of adjusting the position is required.

Therefore, as shown in FIGS. 1 and 2, in this embodiment, a thread guide 26 that guides the thread discharged from the nozzle 2 is attached to the mounting base member 23 fixed to the nozzle holder 3 via the mounting member 27. Is provided. That is, the yarn holder 26 is further provided in the nozzle holder 3 in which the nozzle 2 and the collision body 4 are provided, and the nozzle 2 or the collision body 4 and the yarn guide 26 are integrated. Then, the yarn passed through the nozzle 2 from the right side in FIG. 1 and discharged from the yarn discharge portion 12 is guided upward via a yarn guide located on the front side (right side in FIG. 2) in FIG. The As described above, since the yarn guide 26 is integrated with the nozzle holder 3, the position of the yarn guide 26 is automatically determined only by installing the yarn processing apparatus 1 at a predetermined position. There is no need to adjust the position relative to 2.

Next, the operation of the yarn processing apparatus 1 of the present embodiment at the time of bulky processing will be described. First, as shown in FIGS. 1 to 3, a yarn 31 made of a filament such as synthetic resin is introduced from an introduction port 11 a of a yarn introduction portion 11 provided in the nozzle 2 and guided to the air introduction portion 13. In addition, air supplied from an air supply source (not shown) is injected into the air introduction portion 13 from the air injection hole 14.

The air injected into the air introduction unit 13 is discharged from the yarn discharge unit 12, and further collides with the collision body 4 disposed to face the discharge port 12a. Is discharged from the gap between the collision body 4 and the yarn discharge portion 12. At this time, the filament 31 constituting the yarn 31 is loosened by the intense air flow in the yarn discharge section 12, and further, the yarn 31 is bulky due to the occurrence of loops, entanglement, and the like due to intense movement of the individual filaments. Is granted.

Here, as described above, 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 is ensured between the yarn discharge portion 12 of the nozzle 2 and the collision body 4, and the air flow is easily disturbed in this space. Accordingly, loops and entanglement are likely to occur in the filament discharged from the yarn discharge section 12 by vigorous air flow, so that the yarn processing performance is improved. Further, the improvement in the processing performance of the yarn processing apparatus 1 means that even if processing is performed at a higher yarn speed than before, processing quality equivalent to the conventional one can be obtained, and productivity is improved. This reduces the amount of air consumed to process a unit length of yarn.

Further, in the present embodiment, the concave portion 4a of the collision body 4 is formed by a continuous curved surface having an arc cross section. When the concave portion 4a is formed in a curved surface, the air discharged together with the yarn from the yarn discharging portion 12 flows along the inner surface in the space in the concave portion 4a, so that the air is less likely to locally stay in the filament. Loops and confounding are more likely to occur. Further, the concave portion 4a having an arc-shaped cross section has the most concave shape in the central portion (position where the central axis of the nozzle 2 passes), and the yarn discharged from the yarn discharge portion 12 is in the innermost portion of the concave portion 4a. It converges and collides. As described above, the yarn concentrates and collides with one place of the collision body 4, so that subsequent yarn processing (loop formation or entanglement) is stably performed, and the processing performance of the yarn is improved.

Further, in the present embodiment, a concave portion 4a and a flat portion 4b are provided so as to surround the concave portion at a portion facing the discharge port 12a of the collision body 4. In this case, as compared with the case where the entire facing portion of the collision body 4 is formed in a concave shape and the end portion (outer peripheral portion) is pointed (FIG. 5 (e) of a modified form to be described later), Variations in the shape of the end (outer peripheral portion) of the facing portion are reduced, and chipping is less likely to occur, so that yarn processing is stable. When the outer diameter of the collision body 4 is D, the diameter of the recess 4a is d, and the width of the flat portion 4b is t, D = d + 2t. The width t of the flat portion 4b is 0 ≦ t ≦ 5. It is preferable to be determined in the range of (mm).

Note that the present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention, as exemplified below.

1] The concave shape of the collision body 4 facing the discharge port 12a of the nozzle 2 is not limited to the circular arc shape in 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 recess 4 a.

5A to 5D, the elliptical arc-shaped recess 4a in FIG. 5A has an inner surface formed in a curved surface, like the arc-shaped recess (see FIG. 4) of the above embodiment. For this reason, the air flows along the inner surface and is not likely to stay locally, and loops and entanglements are likely to occur in the yarn. In addition, in the elliptical arc shape of (a) and the conical shape of (d), since the most concave portion is in the center, the yarn is concentrated and collides with the innermost part of the collision body, so that subsequent yarn processing is stable. Done.

Further, as shown in FIG. 4 of the above embodiment, the recess 4a is not necessarily provided on a part of the surface of the collision body 4 on the discharge port 12a side, and the periphery of the recess 4a is not necessarily surrounded by the flat portion 4b. As shown in FIG. 5E, the entire surface of the collision body 4 on the discharge port 12a side may be a recess 4a.

2] The nozzle 2 is not limited to the shape shown in FIG. For example, as shown in FIG. 6A, the yarn introduction portion 11 may be tapered and the yarn discharge portion 12 may be a trumpet shape. Alternatively, as shown in FIG. 6B, the yarn introduction portion 11 may be a straight shape whose 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 embodiment, the collision body 4 may be fixed to the nozzle holder 3.

Next, specific examples of the present invention will be described in comparison with comparative examples.

(1) Nozzle and collision body specifications Table 1 shows the specifications of the four types of nozzles used in the examples and comparative examples, and Table 2 shows the specifications of the six kinds of collision bodies. Moreover, the combination of these nozzles and a collision body is shown in FIG.

No. in Table 1. 1 nozzle and no. The two nozzles are nozzles shown in (1) on the left side of FIG. In Table 2, No. 3 nozzles and no. The four nozzles are nozzles shown in (2) on the right side of FIG. However, as shown in Table 1, no. 1 nozzle and no. In the two nozzles, the diameters of the air injection holes are different, and the thickness range of the applied yarn is slightly shifted (No. 1 nozzle is for a thin yarn and No. 2 nozzle is for a thick yarn). No. 3 nozzles and no. The same applies to the four nozzles.

Further, as shown in Table 2, the collision body is compared with the three types of collision bodies (Cup), which are the embodiments to which the present invention is applied, in which the portion facing the discharge port of the nozzle is formed in a concave shape. For example, a total of six types of two types of spherical impact bodies (Ball) and one type of flat impact body (Plate) are used. In FIG. 7, (a) and (e) are 13 mm spherical collision bodies, (b) and (f) are 6 mm spherical collision bodies, (c) and (g) are flat plate collision bodies, and (d) and (h). Is the concave collision body of the present invention. Moreover, all the six types of collision bodies are made of ceramics.

(2) Comparison of processing performance due to the difference in the shape of the impacting body We examined how the processing performance of the yarn processing device changes due to the difference in the shape of the impacting body. That is, the nozzle of Table 1 and the collision body of Table 2 were combined, and the experiment was performed by changing the thread material and the thread thickness, and the thread tension on the nozzle downstream side (discharge side) was measured for each case. .

In addition, here, the core yarn and the effect yarn were processed by supplying them to the nozzles at different supply speeds, and the processing was performed by core & effect processing. In addition, the yarn speed (discharge side yarn speed) on the downstream side of the nozzle is changed in four stages, and the overfeed amount (the amount of yarn supplied to the nozzle (supply side yarn speed)) for each of the core yarn and the effect yarn is discharged. The yarn tension (unit: gr) on the discharge side when the yarn amount (excess rate with respect to the yarn amount (discharge side yarn speed)) was made constant was measured. Tables 3 to 6 show the thread tension measurement results on the discharge side for polyester yarn (PET) having a yarn thickness of 150 denier, 300 denier, 600 denier, and 750 denier, respectively. Table 7 shows the thread tension measurement result on the discharge side when the thread thickness is 140d with nylon thread (PA6). In Tables 3 to 7, a nozzle corresponding to the thickness of the thread is appropriately selected from the four types of nozzles in Table 1 and used.

Generally, it is known that the higher the yarn tension on the discharge side, the stronger the entanglement of the yarn. That is, it can be determined that the higher the yarn tension on the discharge side, the better the processing. In this regard, as shown in Tables 3 to 7, the case using the concave collision body (Cup) of the present invention regardless of the thread material, thread thickness, and nozzle type (Example) Then, compared with the case (comparative example) using a spherical impact body (Ball) or a flat impact body (Plate), the yarn tension on the discharge side is higher. That is, it can be seen that the yarn processing performance of the yarn processing apparatus is considerably improved by using the concave collision body.

As can be seen from Tables 3 to 7, generally, the lower the yarn speed, the higher the yarn tension on the discharge side and the better the yarn processing. In this regard, when using a spherical collision body or a flat collision body, when trying to achieve a certain level of processing quality (thread tension above a certain level), the yarn speed has to be lowered. By using the concave collision body of the present invention, a yarn having a quality equal to or better than that of a spherical or flat plate can be produced at a faster yarn speed, and the productivity is greatly improved.

For example, in Table 5, the spherical collision body (Ball) and the flat plate collision body (Plate) have a tension of 11 grams only at a low speed of 350 m / min, whereas the concave collision body (Cup). Thus, it can be seen that even if the yarn speed is increased to 500 m / min, the tension is more than 11 grams, and a quality equivalent to or higher than the processing at a low speed of the spherical impact member or the flat impact member can be obtained.

(3) Concave diameter of concave impactor Next, the processing performance of the yarn when the concave diameter (dimension d shown in FIG. 7) of the concave impactor was changed was examined. Here, three types of impact bodies shown in Table 2 having a recess diameter of 11 mm, 20 mm, and 24 mm and a flat impact body as a comparative example are used. The experiment was carried out by changing. Tables 8 to 10 show the thread tension measurement results on the discharge side when the yarn material is PET and the yarn thickness is 150 denier, 300 denier, and 600 denier, respectively.

As shown in Table 8 to Table 10, regardless of the thread thickness and the type of nozzle, the thread tension is higher in the range of the recess diameter of 11 mm to 24 mm than in the case of using a flat collision body. The processing performance is improved.

It should be noted that if the concave portion of the collision body is made extremely small or extremely large with respect to the diameter of the opposing discharge port, it is considered that the effect of improving the machining performance is small. In this regard, Tables 8 to 10 describe a dimensionless parameter, which is a ratio (ε = K / d) of the nozzle outlet diameter (K) and the concave diameter (d) of the collision body, at least. , Ε is in the range of 0.25 to 1.18, it can be seen that the processing performance is good.

DESCRIPTION OF SYMBOLS 1 Yarn processing apparatus 2 Nozzle 3 Nozzle holder 4 Colliding body 4a Recessed part 4b Flat part 10 Yarn passage 11a Inlet 12 Yarn discharge part 12a Drain 14 Air injection hole 26 Yarn guide 31 Yarn

Claims

A nozzle having a yarn passage having a yarn introduction portion and a yarn discharge portion, and a fluid injection hole for injecting a fluid into the yarn passage;
A collision body having a surface facing the front end surface where the discharge port of the yarn discharge portion is formed with a gap;
Of the surface of the collision body that faces the tip end surface of the yarn discharge portion, a portion facing the discharge port is formed in a concave shape.
The yarn processing apparatus according to claim 1, wherein an inner surface of the concave facing portion of the collision body is formed as a curved surface.
The yarn processing apparatus according to claim 1 or 2, wherein the facing portion of the colliding body is formed in a most recessed shape at a central portion thereof.
The yarn processing apparatus according to claim 1, wherein a cross-sectional shape of the facing portion of the collision body is an arc shape or an elliptical arc shape.
The concave portion and a flat portion that is parallel to the front end surface of the yarn discharge portion including the discharge port and that surrounds the concave portion are formed in the facing portion of the collision body. The yarn processing apparatus according to any one of 1 to 4.
A nozzle holder for holding the nozzle;
The collision body is attached to the nozzle holder,
Further, the nozzle holder is provided with a yarn guide for guiding the yarn that has passed through between the yarn discharge portion of the nozzle and the collision body. The yarn processing apparatus according to any one of the above.