JPH02210011A - Spinneret for wet-spinning of modified cross-section fiber and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject spinneret effective in preventing the breakage of fiber during spinning, decreasing the fluctuation of the thickness of the fiber and preventing the nozzle clogging by opening spinning holes having modified shapes in a specific arranged state on a circular or doughnut-shaped spinneret for wet-spinning. CONSTITUTION:Spinning holes having modified shape are opened in arranged state on a circular or doughnut-shaped spinneret by punching the spinneret while moving the spinneret in the direction of X-axis under rotation. The spinning holes having modified shape are opened on the whole surface of the spinneret at regular intervals directing toward the center of the spinneret without arranging a part or the total of the holes on the concentric circles S1, S2, S3 having the center O of the spinneret as the common center.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in a spinneret used for wet spinning fibers of rayon, acrylic, etc. having irregular cross-sections, and a manufacturing method thereof.

(Prior Art) Conventionally, a spinneret used for wet spinning fibers such as rayon, acrylic, etc. having an irregular cross section such as a C shape, a T shape, or a Y shape has been used.
As shown in Figure 3, a circular base plate 1 or a donut-shaped base plate 1
Each concentric circle St, $ of multiple concentric circles centered on the center 0 of '
2, S, ...... At regular intervals above, C shape, T shape, Y shape.
A type in which spinning holes 2 with irregular cross-sections such as shapes are arranged or drilled, or a fourth type
．． As shown in Figure 5, lines diagonally intersecting at regular intervals at an angle of 60 degrees on the entire surface of the circular base plate 1 or donut-shaped base plate 1'! !
At the intersection P of SR', spinning holes 2 having irregular cross-sections such as C-shape, T-shape, Y-shape, etc. were arranged and bored.

(Problems to be Solved by the Invention) By the way, these spindles for wet-spinning irregularly shaped yarns do not allow the spinning holes 2 of different shapes to be arranged on the circular spinneret plate 1 or the donut-shaped spinneret plate 1'. 1' is moved in the X-axis and Y-axis directions for punching, so the irregularly shaped spinning holes 2 face in the same direction with respect to the X-axis or the Y-axis. However, since the spindle plate 1.1' has a thin wall thickness of 0.25 to 1.0 mm, the spinning hole 2 is affected by processing distortion.
is distorted non-uniformly, the punching tool may break during punching, and the arrangement of the spinning holes 2 may become non-uniform. When wet-spinning irregularly shaped yarns using such a wet spinneret for irregularly shaped yarns, yarn breakage occurred during spinning, variations in yarn thickness, and yarn clogging occurred.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a spinneret for wet spinning irregularly shaped yarn, which can prevent yarn breakage during spinning, reduce variations in yarn thickness, and prevent yarn clogging, and a method for manufacturing the same.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the irregularly shaped yarn wet spinning nozzle of the present invention has a circular or donut-shaped wet spinning nozzle.
The irregularly shaped spinning holes are not arranged partially or completely on the circumference of each concentric circle of multiple concentric circles centered on the center of the spinneret, but are drilled at regular intervals over the entire surface facing toward the center of the spinneret. This is a characteristic feature.

In addition, the method for manufacturing such a spinneret for irregularly shaped yarn involves moving and rotating a circular or donut-shaped spinneret plate in the X-axis direction to gradually form irregularly shaped spinning holes within a certain range from the center toward the outer periphery. It is characterized by being arranged and drilled at regular intervals.

(Function) As described above, the spindle for wet spinning of irregularly shaped yarns of the present invention moves and rotates the spindle plate in the X-axis direction when arranging and drilling irregularly shaped spinning holes in a circular spinneret plate or a donut-shaped spinneret plate. In order to perform punching, the irregularly shaped spinning holes face toward the center of the spinneret. Therefore, even if the thickness of the spinneret plate is thin, uneven distortion does not occur in the spinning holes, the puncher tool does not break during processing, and the spinning holes are arranged uniformly.

When the irregularly shaped yarn is wet-spun using this irregularly shaped yarn wet spinning nozzle, there will be no yarn breakage during spinning, no variation in yarn thickness, no yarn clogging, and uniform cross-sectional dimensions. Obtains irregularly shaped yarn with good precision.

(Example) An example of the spindle for wet spinning irregularly shaped yarn of the present invention and the method for manufacturing the same will be described.

First, an example of a method for manufacturing a spinneret for wet spinning of irregularly shaped yarn will be explained with reference to the drawings.As shown in FIG.
A circular saucer-shaped base plate 11 with 5 holes, depth 5 mm, outer diameter φ 25 mm of flange 10, and wall thickness 0.5 mm is moved in the X-axis direction and rotated within a range of φ 2.5 mm from the center. Gradually towards the outer periphery, the outer diameter is φ300 μm and the inner diameter is φ150.
C-shaped spinning holes 12 of .mu.m were arranged and drilled at intervals of 2 ff and 1 m to obtain a spinneret 13 for wet spinning of irregularly shaped yarn.

In the thus obtained irregularly shaped yarn wet spinning nozzle 13, the C-shaped spinning hole 12 is partially or Rather than being arranged completely, the holes were arranged in a staggered manner at two stop intervals on the entire surface with the nozzle center facing 0, and there was no uneven distortion in the C-shaped spinning holes 12, resulting in a uniform arrangement. . In addition, since the puncher tool does not break when forming the C-shaped spinning holes 12, the C-shaped spinning holes 12 have high dimensional accuracy and have a smooth inner surface.

However, when C-shaped irregular yarn was wet-spun using the irregular-shaped yarn wet spinning nozzle 13 having such a structure, no yarn breakage occurred during spinning, and the thickness of the yarn varied by an average outer diameter of φ20 μm by 1.2.
It was possible to obtain irregularly shaped yarns that were as small as μm, did not cause yarn clogging, and had a uniform C-shaped cross section with high dimensional accuracy.

Note that the above example is a case of a spinneret for wet-spinning a C-shaped irregularly shaped yarn, but in the case of a spinneret for spinning a T-shaped or Y-shaped irregularly shaped yarn, irregularly shaped yarn with high dimensional accuracy can be obtained in the same manner as above. Can be done. Further, although the above embodiment is a case of a circular base, the same applies to a case of a donut-shaped base.

(Effects of the Invention) As can be seen from the above description, according to the spindle for wet spinning irregularly shaped yarn of the present invention, no yarn breakage occurs when wet spinning irregularly shaped yarn, and variations in yarn thickness are small. Further, yarn clogging does not occur, and therefore irregularly shaped yarns with a uniform cross-sectional shape and high dimensional accuracy can be easily obtained.

Furthermore, according to the method for manufacturing a spinneret for wet spinning of irregularly shaped yarns of the present invention, even if the wall thickness of the spinneret plate is thin, uneven distortion does not occur in the spinning holes arranged and drilled, and the puncher tool does not break during processing. , it is possible to easily obtain a spinneret for wet-spinning irregularly shaped yarns that has uniform spinning holes and exhibits the above-mentioned excellent effects.

[Brief explanation of the drawing]

Fig. 1 aSb is a sectional view and a plan view showing an embodiment of the irregular shaped yarn wet spinning nozzle of the present invention, and Figs. FIGS. 4 and 5 are plan views of conventional circular and donut-shaped irregular yarn spinning nozzles in which spinning holes are provided at regular intervals, respectively. Applicant: Tanaka Kikinzoku Kogyo Co., Ltd.

Claims (1)

[Claims] 1. In a circular or doughnut-shaped wet spinning nozzle, irregularly shaped spinning holes are arranged partially or completely on the circumference of each concentric circle of multiple concentric circles centered around the nozzle center. , a spinneret for wet spinning of irregularly shaped yarn, characterized in that holes are formed at regular intervals on the entire surface facing toward the center of the spinneret. 2. Moving and rotating a circular or donut-shaped spinneret plate in the X-axis direction to gradually arrange and drill irregularly shaped spinning holes at regular intervals from the center toward the outer periphery within a certain range. A method for producing a spinneret for wet spinning irregularly shaped yarn, characterized by: