JPH0121243B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a spinneret for irregularly shaped yarn.

The stock solution discharged from the discharge hole with the protruding tip does not wet and spread at least beyond the area of the tip of the protruding tip. Therefore, the stock solution 2 discharged from the discharge hole 1 whose tip does not protrude as shown in FIG. 1 and the discharge hole 1' whose tip protrudes as shown in FIG. 2 accumulates as shown in the figure. There is a difference in form, and the discharged stock solution 2 has a smaller tip area of the protruding tip, which results in a thread with less unevenness in thickness.

For this reason, a spinneret having a discharge hole 1' with a protruding tip is widely used to improve yarn thickness unevenness.

However, among the irregularly shaped discharge holes, particularly the irregularly shaped discharge holes 3a, 3 as shown in FIGS. 3a, b, and c.
The yarns discharged from b and 3c are as shown in Fig. 4a and 3c.
As shown in b and c, the irregularly shaped yarns 4a, 4b, and 4c are rounded in the center and have no edges.
This is because the stock solution 2 tends to have a circular cross section at the moment it is discharged from the discharge holes 3a, 3b, and 3c.

For this reason, an attempt has been made to drill the irregularly shaped hole 3a' so that the tip area of the protruding tip of the irregularly shaped hole 3a' is made as small as possible as shown in FIG. However, even if this improves the uneven thickness of the thread, it is not possible to obtain a thread with a similar shape to the irregularly shaped hole 3a', and the fourth
As shown in Figure a, the yarn 4a was shaped like a yarn with a rounded center and no edges. This is because the thickness around the opening of the irregularly shaped hole 3a' is uniform, so that the discharged stock solution wets and spreads in the same amount at the center and the outer periphery during spinning.

The present invention has been made in order to solve such problems, and it is possible to spin a high-quality irregular-shaped yarn with high dimensional accuracy of irregular-shaped holes and similar shapes, as well as no unevenness in the thickness of the yarn. It is an object of the present invention to provide a spinneret for yarn spinning.

Hereinafter, an embodiment of a spinneret for irregularly shaped yarn according to the present invention will be explained with reference to FIGS. The opening 7 of the discharge hole 6 on the distal end face of the protruding tip is thinner toward the center and gradually thickens toward the outer periphery.

Note that the discharge hole 6 of the irregularly shaped yarn spinning nozzle 5 in the above embodiment is cross-shaped, but in the case of a T-shaped, Y-shaped, radial, etc.-shaped discharge hole, the opening on the tip surface of the discharge hole protrudes in the same way. The surrounding wall thickness is thinner near the center and gradually thickens toward the outer periphery.

In the irregularly shaped yarn spinning nozzle 5 of the present invention constructed as described above, the thickness of the opening periphery 7 of the distal end face of the protruding cross-shaped discharge hole 6 is thinner near the center and gradually thickens toward the outer periphery. Therefore, when the undiluted solution is discharged, there is less wetting of the undiluted solution near the center of the opening periphery 7 on the tip surface, and the wetting of the undiluted solution gradually increases toward the outer periphery.In other words, the undiluted solution does not wet and spread near the center. be. Therefore, the yarn discharged and spun from the discharge hole 6 has no bulge in the center and has a uniform cross-sectional cross-section similar to the cross-sectional shape of the edged discharge hole 6.

As can be seen from the above description, according to the spinneret for irregularly shaped yarn of the present invention, it is possible to easily spin irregularly shaped yarn of good quality with high dimensional accuracy and a similar shape to the irregularly shaped discharge hole without the thickness of the yarn. This has an excellent effect.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a main part showing a discharge hole in a spinneret whose tip end does not protrude, FIG. Figures 3a, b, and c are views showing irregularly shaped discharge holes, and Figures 4a, b, and c are cross-sectional shapes of irregularly shaped yarn spun through the irregularly shaped discharge holes shown in Figure 3a, b, and c. Figure 5 is a diagram showing an irregularly shaped hole with a reduced tip area of the protruding tip, Figure 6a
1 is a longitudinal sectional view showing an example of the irregularly shaped hole of the irregularly shaped yarn spinning nozzle according to the present invention, and Figure b is a view taken along the line A--A in Figure A. 5... A spinneret for irregularly shaped yarn of the present invention, 6... Cross-shaped discharge hole, 7... Surroundings of the opening of the discharge hole.

Claims (1)

[Claims] 1. In a spinneret for irregularly shaped yarn in which the tip of the irregularly shaped discharge hole protrudes, the wall thickness around the discharge hole of the protruding tip is thinner near the center and gradually thickens toward the outer periphery. A spinneret for spinning irregularly shaped yarn.