JP2002294515A - Spinneret for conjugate spinning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinneret for conjugate spinning which can easily be processed and can reduce the scrapping frequency of a spinneret material. SOLUTION: This spinneret for conjugate spinning is characterized by vertically forming in a spinning plate a spinning hole 5 comprising a right circular cylindrical hole 5a, a truncated conical hole 5b, and an extruding hole 5c which are sequentially connected to each other in the direction for extruding a spinning liquid, fitting into the spinning hole 5 a filling member 7 which has a right columnar portion 7a to be tightly fit to the right circular cylindrical hole 5a and a conical portion 7b to be tightly fit to the truncated conical hole 5b, disposing at least two paths 9A, 9B on the side face of the right columnar portion 7a in the direction for extruding the spinning liquid, and guiding mutually different spinning liquids in the paths 9A, 9B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite spinneret, and more particularly, to a composite spinneret capable of facilitating manufacture and reducing the frequency of discarding a base material of the spinneret.

[0002]

2. Description of the Related Art A composite spinneret requires a mechanism for discharging two or more kinds of spinning liquids into a single spinneret. Therefore, the structure is complicated and requires a lot of trouble in production. When precision is required and processing accuracy is low, there is a problem that a composite yarn having a target composite ratio cannot be obtained. Therefore, if there is a processing defect, it must be discarded, and the yield has been a problem.

Conventionally, as a spinneret for a side-by-side type composite yarn, a type in which different types of yarn liquids are supplied into the spinning holes of a die plate has been proposed. There is a problem that the distribution state of the spinning solution in the cross section of the obtained composite yarn varies.

Japanese Utility Model Publication No. Sho 40-30323 discloses a composite spinneret in which a hole is formed obliquely inclined toward a discharge portion of a spinning hole for each spinning solution and is merged immediately before the discharge portion. Proposed.

According to this composite spinneret, it is possible to form a composite yarn without mixing each spinning solution before discharging, but it is necessary to provide an inclined hole in the die plate, so that it is very difficult to obtain high processing accuracy. This is difficult, especially in the case of producing a spinneret having a large number of spinning holes in one spinneret plate, and there has been a problem that slight errors in the inclination angle change the compounding ratio and result in compound unevenness. In addition, since the inclined hole is directly formed in the base plate, the base plate itself cannot be modified, resulting in a problem that the yield has to be reduced due to the necessity of disposal.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a composite spinneret which can be easily processed and can reduce the frequency of discarding the base metal.

[0007]

The composite spinneret of the present invention, which achieves the above object, has a spinning hole in which a straight cylindrical hole, a truncated conical hole, and a discharge hole are sequentially connected in the direction of spinning liquid perpendicular to the die plate. Perforated, a filling member having a straight cylindrical portion that is in close contact with the straight cylindrical hole and a conical portion that is in close contact with the truncated conical hole is fitted in the spinning hole, and a side surface of the straight cylindrical portion is in a spinning liquid discharge direction. At least two paths along the path are provided, and different spinning solutions are guided to these paths.

As described above, since the spinning holes are vertically formed in the base material of the die plate, the processing of the spinning holes is no different from that of the spinneret of a single component yarn. it can. In addition, the passage leading to the discharge hole in order to combine two or more kinds of spinning liquids may be processed on the side of the right cylindrical portion of the filling member, and there is no need to form an inclined hole in the die plate.
Since high-precision processing can be performed and processing is easy in any case, the frequency of discarding the base plate can be significantly reduced, and the yield can be significantly improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 1 shows an example of a composite spinneret of the present invention, and FIG. 2 shows an upper surface of a die plate used for the composite spinneret.

The composite spinneret 1 has a spinneret plate 2 and a distribution plate 3 stacked and housed in the bottom of a pack 4, and is attached to a spinning machine (not shown). The base plate 2 is formed in a disk shape in plan view, and is provided so that a large number of spinning holes 5 are distributed in a multiple annular shape. Each spinning hole 5 is provided with a die plate 2
3 and a straight cylindrical hole 5a, a truncated conical hole 5b, and a discharge hole 5 as shown in the enlarged view of FIG.
It is formed so as to be connected in the order of c. Straight cylindrical hole 5a
Is configured to have a larger diameter than the discharge hole 5c for discharging the spinning liquid in a thread shape.

On the spinning solution supply side (upper end side) of each of the spinning holes 5, an oval concave portion 6 is formed so that the circumferential direction of the die plate 2 is the long axis direction. The width of the oval recess 6 in the short axis direction is the same as the diameter of the right cylindrical hole 5a.

A filling member 7 as shown in FIG. 5 is inserted and fitted into each of the spinning holes 5, and is firmly fixed. The filling member 7 is formed so as to have a straight cylindrical portion 7a and a conical portion 7b. The straight cylindrical portion 7a has substantially the same diameter as the straight cylindrical hole 5a of the spinning hole 5, and is fitted in the straight cylindrical hole 5a. Further, the conical portion 7b has substantially the same conical surface as the truncated conical hole 5b and is closely fitted.

Further, on the side surface of the right cylindrical portion 7a, two passages 9A and 9B each having a groove having an arc-shaped cross section are provided for guiding different spinning solutions A and B to positions opposite to each other.
The upper ends of the passages 9A and 9B face the oval recess 6 and the lower ends face the discharge holes 5c.
The upper end of the filling member 7 is formed so as to be flush with the upper surface of the die plate 2. The filling member 7 may be fixed to the spinning hole 5 in an interference fit state. However, the filling member 7 may be welded to the short axis portion of the oval concave portion 6 if necessary.

As described above, the distribution plate 3 is laminated on the base plate 2 in which the filling member 7 is fitted in the spinning hole 5 so as to be in close contact with the spinning hole 5. The distribution plate 3 is provided with a distribution hole 8A for supplying the spinning solution A and a distribution hole 8B for supplying the spinning solution B at a position corresponding to the upper end of the spinning hole 5. This distribution plate 3
When the is closely attached to the upper surface of the base plate 2, the distribution hole 8A communicates with the passage 9A of the filling member 7, and the distribution hole 8B communicates with the passage 9B.

When two types of spinning solutions A and B are compositely spun using the composite spinneret 1, the two types of spinning solutions A and B are supplied from the distribution holes 8 A and 8 B of the distribution plate 3 to the spinning plate 2. After being separated and supplied to the passages 9A and 9B of the filling member 7 fitted into the spinning hole 5 of FIG. Spin.

In the illustrated example, the case where two types of spinning liquids A and B are combined is described. In the present invention, the number of passages provided on the side surface of the right cylindrical portion 7a of the filling member 7 is increased, and the number of passages is increased. By forming the distribution holes of the distribution plate so as to correspond to the above, composite yarns of three or more kinds of spinning solutions can be spun.

As described above, according to the composite spinneret of the present invention, the spinning hole 5 may be formed in the spinneret plate 2 in the vertical direction in the same manner as the spinneret for spinning a single component yarn. Can be. In addition, since the passages 9A and 9B for guiding different spinning solutions to the discharge holes 5c of the spinning holes 5 may be formed along the side surfaces of the right cylindrical portion 7a of the filling member 7, compared with the conventional processing of inclined holes. And can be processed with high precision. As a result, the frequency of discarding the base metal base plate is reduced, and the yield can be improved.

Further, at the time of spinneret cleaning, the spinning hole 5 and the passages 9A and 9B can be made straight in the same direction, so that ultrasonic waves can be easily transmitted in ultrasonic cleaning after chemical solution cleaning. The filling member 7 can be used repeatedly stably without causing a change in the position of the filling member 7 due to ultrasonic waves.

[0020]

As described above, according to the composite spinneret of the present invention, since the spinning holes are vertically formed in the base material of the die plate, the spinning holes are processed by a single component yarn spinneret. It is possible to perform high-precision processing without any change. In addition, the passage leading to the discharge hole in order to combine two or more kinds of spinning solutions,
It is sufficient to work on the side surface of the right cylindrical portion of the filling member, and it is not necessary to form an inclined hole in the base plate, so that high-precision processing can be performed. In either case, processing is easy. The frequency of disposing of the board is greatly reduced, and the yield can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an example of a composite spinneret according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged sectional view of a main part of a spinning hole portion of the composite spinneret of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a perspective view illustrating a filling member used in the composite spinneret of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Composite spinneret 2 Spinneret 3 Distribution plate 5 Spinning hole 5a Straight cylindrical hole 5b Truncated cone hole 5c Discharge hole 7 Filling member 7a Cylindrical part 7b Conical part 8A, 8B Distribution hole 9A, 9B Passage

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kiyohiko Umebayashi 1-1-1 Sonoyama, Otsu-shi, Shiga F-term in the Shiga Plant of Toray Co., Ltd. (Reference) 4L045 BA21 CB16 CB18 CB18 CB21

Claims (4)

[Claims] 1. A spinning hole, in which a straight cylindrical hole, a truncated conical hole, and a discharging hole are sequentially connected in a spinning liquid discharge direction, are vertically formed in a base plate, and a straight cylinder closely adhered to the spinning hole with the straight cylindrical hole. And a filling member having a conical portion that is in close contact with the truncated conical hole, and at least two passages along the spinning liquid discharge direction are provided on the side surface of the right circular column portion. Composite spinneret to guide. 2. The composite spinneret according to claim 1, wherein an oval recess is provided at an upper end of the spinning hole. 3. The composite spinneret according to claim 1, wherein the passage comprises a groove having an arcuate cross section. 4. The composite spinneret according to claim 1, wherein the number of the passages is two.