JPH04257305A - Production of spinneret - Google Patents

Abstract

PURPOSE:To obtain a spinneret causing no variation in spun fiber fineness by using a punching tool with a ring-shaped press jig engaged and welded therewith in boring a stock liquor guide hole for spinning nozzles to prevent developing a raise on the periphery of the inlet of said guide hole leading to no need for its abrasive finishing. CONSTITUTION:When the objective spinneret having many spinning nozzles on a cap with a flange is to be manufactured, a stock liquor guide hole for the nozzles is bored with a punching tool having at the tip a boring part of the same dimension as that of said guide hole with a ring-shaped press jig engaged and welded with the outer periphery of its upper part.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for manufacturing a spinneret for wet spinning rayon, acrylic, etc.

0002

BACKGROUND OF THE INVENTION A spinneret for wet spinning rayon, acrylic, etc. has a cap-shaped spinneret plate 2 having a flange 1 on the outer periphery as shown in FIG. 1, and a funnel-shaped stock solution introduction hole as shown in FIG. A large number of spinning holes 5 are formed through the spinning holes 5, each consisting of a thin vertical stock solution discharge hole 4 at the tip thereof.

In manufacturing this spinneret 6, in order to perforate the stock solution introduction hole 3 of the spinning hole 5, a punch tool 8 having a sharp perforation part 7 concentrically and integrally at the tip is used as shown in FIG.
It was perforated.

0004

[Problems to be Solved by the Invention] However, in the punch tool 8, the r dimension of the base 7' of the sharp-pointed hole 7 at the tip varies by 0.015 to 0.04 mm when the punch tool 8 is manufactured. The size of the bulge 9 generated at the inlet periphery of the stock solution introduction hole 3 shown in FIG. 6, which was punched using the punch tool 8 that caused this variation, varies in size. As a result, when polishing is performed later to remove the protuberance 9, uneven polishing occurs, and the inlet diameter of the stock solution introduction hole 3 becomes uneven. Therefore, when rayon, acrylic, etc. are wet-spun using a spinneret having a stock solution introduction hole 3 with uneven inlet diameter as described above, denier unevenness is likely to occur.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for manufacturing a spinneret in which no bulges are formed around the entrance of the stock solution introduction hole.

[0006]

[Means for Solving the Problems] A method for manufacturing a spinneret according to the present invention to solve the above-mentioned problems, in manufacturing a spinneret having a large number of spinning holes in a flanged cap-shaped spinneret plate, it is possible to The undiluted solution introduction hole of the hole is to be punched with a punch tool having a perforation part at the tip having the same size and shape as the undiluted solution introduction hole, and a ring-shaped holding jig fitted and welded to the upper outer periphery of the perforation part. This is a characteristic feature.

[0007]

[Function] As described above, in the method for manufacturing a spinneret of the present invention, the tip has a perforation having the same size and shape as the stock solution introduction hole, and a ring-shaped holding jig is fitted and welded to the upper outer periphery of the perforation. The punch tool, that is, the perforation part and the holding jig, were processed separately and welded together, so there was no r at the base of the perforation part.
Moreover, since the stock solution introduction hole is punched with a punch tool whose length dimension matches the depth of the stock solution introduction hole to be drilled, a bulge occurs at the periphery of the entrance of the stock solution introduction hole. do not. Therefore, it is no longer necessary to polish the protrusions as in the conventional method, and the accuracy of the entrance diameter of the stock solution introduction hole becomes high.

[0008]

EXAMPLE An example of the method for manufacturing a spinneret of the present invention and a conventional example will be described.

First, an example will be described. A cap-shaped Au-Pt with flange 1 shown in FIG. When manufacturing a spinneret by drilling 10,000 spinning holes through an alloy spinneret plate 2, a diameter of 0.0 mm is formed at the tip as shown in FIG.
It has a pin part 10 of 3 mm and a height of 0.35 mm at the tip.
It has a sharp perforated part 11 with a taper angle of 50 degrees, and a ring shape with an inner diameter of 0.3 mm, an outer diameter of 0.7 mm, and a thickness of 0.1 mm is attached to the outer periphery of the pin part 10 0.03 mm above the perforated part 11. As shown in FIG. ，
000 holes were drilled. After that, the portion 15 that bulged out on the bottom surface of the base plate 2 due to the drilling of the stock solution introduction holes 3 was removed by polishing as shown by the chain line, and then the bottom of each stock solution introduction hole 3 was marked with an inner diameter of 0.
．． A stock solution discharge hole 4 of 0.06 mm in diameter was drilled, and a spinning hole 5 was drilled through the spinneret 6 to obtain a spinneret 6.

Next, a conventional example will be explained.A cap-shaped Au-P with flange 1 shown in FIG.
In manufacturing a spinneret by drilling 10,000 spinning holes through a T-alloy spinneret plate 2, a base 7' with an outer diameter of 0.3 mm is provided at the tip as shown in FIG. Using a punch tool 8 with an outer diameter of 0.7 mm, which has a sharp perforation part 7 with a height of 0.35 mm and a taper angle of 50 degrees concentrically at its tip, as shown in FIG.
As shown in the figure, the stock solution introduction hole 3 of the spinning hole is set in the spinneret plate 2 at 10,0 mm.
00 holes were drilled. After that, a bulge 9 and a cap plate 2 are formed around the inlet of the stock solution introduction hole 3 due to the drilling of the stock solution introduction hole 3.
After removing the bulging portion 15 on the lower surface by polishing as shown by the chain line, the bottom of each stock solution introduction hole 3 has an inner diameter of 0.06 mm as shown by the chain line.
A stock solution discharge hole 4 of mm in diameter was drilled, and a spinning hole 5 was drilled through the spinneret 6 to obtain a spinneret 6.

When the inlet portion of the stock solution introduction hole 3 in the spinning hole 5 of the spinneret 6 of the thus obtained example and the conventional example was inspected, it was found that the conventional example had an outer diameter of 0.5 to 0.6 mm.
．． A protrusion of 0.01 to 0.02 mm occurred and a variation of 0.03 to 0.05 mm in the inlet diameter, resulting in poor accuracy, whereas in the example, no protuberance occurred at all and the inlet diameter was uniform. , the accuracy was high. This is solely based on the structural difference between the punch tool 14 and the punch tool 8.

0012

Effects of the Invention As described above, according to the method for manufacturing a spinneret of the present invention, no bulge is generated at the periphery of the inlet of the stock solution introduction hole of the spinning hole, so there is no need to polish the bulge as in the conventional method. The accuracy of the inlet diameter of the stock solution introduction hole becomes high. Therefore, when rayon, acrylic, etc. are wet-spun using a spinneret having a stock solution introduction hole with a highly accurate inlet diameter, a product with no denier unevenness can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a cap-shaped base plate with a flange.

FIG. 2 is a diagram showing the main parts of a punch tool used in the method for manufacturing a spinneret of the present invention.

FIG. 3 is a sectional view of a main part showing a stock solution introduction hole punched in a base plate by the punch tool of FIG. 2;

FIG. 4 is a sectional view of a main part showing a spinning hole of a spinneret.

FIG. 5 is a diagram illustrating a main part of a conventional punch tool for punching the stock solution introduction hole of the spinning hole in FIG. 4;

FIG. 6 is a sectional view of a main part showing a stock solution introduction hole punched in the base plate by the punch tool of FIG. 5;

[Explanation of symbols]

1 Flange 2 Cap-shaped base plate 3 Stock solution introduction hole 4 Stock solution discharge hole 5 Spinning holes 6 Spinneret 11 Perforation part 12 Presser jig 13 Welding 14 Punch tool

Claims (1)

[Claims] Claim 1: In manufacturing a spinneret having a large number of spinning holes in a flanged cap-shaped spinneret plate, the raw solution introduction hole of the spinning hole is connected to a perforated portion having the same size and shape as the raw solution introduction hole at the tip. 1. A method for producing a spinneret, which comprises punching a hole using a punch tool having a ring-shaped holding jig fitted and welded to the upper outer periphery of the hole.