JPH06220711A - Spinneret - Google Patents

Abstract

PURPOSE:To provide the spinneret capable of reducing the generation of fiber breakage and irregular denier during the spinning of the fibers, thereby capable of improving the quality of the fibers. CONSTITUTION:This spinneret 2 comprising a thin plate having many spinning holes 1 is characterized by rounding 6 a part of the outlet opening edge of each spinning hole 1, the part being placed in the direction for winding up the fiber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinneret for spinning chemical fibers such as acrylic and rayon.

[0002]

2. Description of the Related Art A conventional thin plate (for example, a thickness of 0.35 mm) plate-shaped spinneret 2 having a large number of spinning holes 1 shown in FIG. It expands by about 0.02 to 0.3 mm due to the elongation of the material due to processing.
When the fiber 4 is spun by the spinneret 2, the spinning surface 3 bulges in the spherical shape so as to project outward by about 1 to 3 mm at the central portion due to the spinning pressure as shown by the chain line, as shown in FIG. The capillary direction K of the spinning hole 1 and the winding direction M of the fiber 4 intersect with each other, and the yarn is rubbed by the edge 5 of the outlet opening edge of the spinning hole 1 to cause yarn breakage or uneven denier. And the quality of the fiber was low.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide a spinneret capable of reducing the occurrence of yarn breakage and uneven denier during fiber spinning.

[0004]

The spinneret of the present invention for solving the above-mentioned problems is a spinneret of a thin plate having a large number of spinning holes, in which the fiber at the exit opening edge of the spinning hole is wound up. It is characterized in that the part is marked with a radius.

[0005]

As described above, the spinneret of the present invention is rounded at the exit opening edge of the spinning hole in the direction in which the fiber is wound, and has no edge. As a result, the thread slips better, the bending is reduced, and the thread is less rubbed, so that the occurrence of thread breakage and uneven denier is reduced.

[0006]

EXAMPLE An example of the spinneret of the present invention will be described with reference to the drawing. As shown in FIG. 1, the outer diameter is 60 mm and the flange outer diameter is 70 mm.
mm, depth 10 mm, wall thickness 0.35 mm, Pt-Au 60% dish-shaped spinneret 2, with 10,000 intervals of 0.30 mm diameter and 0.29 mm depth of stock solution introduction hole 1a and diameter of 0.06 mm, A spinning hole 1 consisting of a stock solution discharge hole 1b having a depth of 0.06 mm is bored, and a radius 6 of 0.02 to 0.03 mm is attached to the exit opening edge of each spinning hole 1 in the direction in which the fiber is wound. ing.

[0007] The spinneret 2 of the embodiment configured as described above
When the rayon was wet-spun by the method, the spinning surface 3 swelled outward by a spherical shape by about 2 mm due to the spinning pressure, but only a few yarns were broken during spinning and the denier unevenness was very small. This is because there is no edge because the radius 6 is attached to the portion of the exit opening edge of the spinning hole 1 in the direction in which the fiber is wound,
The slippage of the yarn during winding of the fiber 4 during spinning is improved,
The bending is alleviated, and the thread is less likely to rub, which is exactly the reason.

[0008]

As described above, according to the spinneret of the present invention,
During winding of the fiber during spinning, the yarn slips well, the bending is relaxed, and the yarn is less likely to be rubbed, so that the occurrence of yarn breakage and uneven denier is reduced, and the quality of the fiber is improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a spinneret of the present invention.

FIG. 2 is a vertical sectional view showing a conventional spinneret.

FIG. 3 is an enlarged view of a portion A on a swollen spinning surface shown by the alternate long and short dash line in FIG.

[Explanation of symbols]

 1 Spinning hole 2 Spinneret 6 R

Claims (1)

[Claims] 1. A spinneret for a thin plate having a large number of spinning holes, characterized in that a rounded portion is provided on a portion of an exit opening edge of the spinning hole in a direction in which fibers are wound.