JP2642965B2 - Spinneret spinning hole drilling method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for forming a spinning hole of a spinneret for spinning a chemical fiber.

(Prior Art) Conventionally, in order to form a spinning hole of a spinneret, as shown in FIG. 4, a punch having a simple conical tip on the bottom 2 of a spinneret material 1 formed into a dish shape. Tens to tens of thousands of spinning holes 4 are drilled with the tool 3, specifically, the spinning solution inlet 4a of the spinning hole 4, and then the spinning solution is discharged at the bottom of the spinning solution inlet 4a by another punch tool. Hole 4b was drilled.

(Problems to be Solved by the Invention) In the above-described method for forming the spinning hole 4, when the spinneret material 1 is a soft material such as Pt-Au or Ta, the spinning solution introduction hole 4a is formed by drilling. At this time, the periphery of the opening of the spinning solution introduction hole 4a rises as shown in FIG. 4 along the outer peripheral surface of the tip of the punch tool 3, so that it takes time to cut off the protrusion 5. Further, when the thickness of the spinneret material 1 and the depth of the spinning liquid introduction hole to be formed are varied, the opening diameter of the spinning liquid introduction hole varies. Further, when a bulge 5 is formed at the periphery of the opening of the spinning solution introduction hole 4a as described above, the adjacent spinning solution introduction hole 4a may be deformed due to the interference of the bulge 5, and may not be a perfect circle on a plane.

(Object of the Invention) The present invention has been made in order to solve the above-mentioned problems, and it is possible to reduce the swelling generated at the periphery of the opening of the spinning liquid introduction hole, and to control the thickness of the spinneret material and the spinning liquid introduction to be formed by drilling. Provided is a method for forming a spinning hole in a spinneret, in which even if the hole depth varies, the opening diameter of the spinning solution introduction hole hardly varies and the adjacent spinning solution introduction holes are not deformed. The purpose is to do so.

(Means for Solving the Problems) According to the method for forming a spinning hole of a spinneret of the present invention for solving the above-mentioned problems, in forming a spinning hole of a spinneret, a small conical sharp point is formed at the tip. And a straight part having the same diameter as the spinning solution introduction hole at the upper part of the sharp part, and the upper part of the straight part uses a punch tool having a larger diameter than the spinning solution introduction hole. A spinning solution introduction hole is formed at a sharp portion and a straight portion.

(Operation) As described above, the spinneret spinning hole drilling method of the present invention has a small sharp conical portion at the tip and a straight portion having the same diameter as the spinning solution introduction hole above the sharp portion. The upper part of the straight part uses a punch tool having a larger diameter than the spinning liquid introduction hole, and the conical sharp part of the punch tool and the spinning liquid introduction hole are drilled at the straight part. The material of the introduction hole portion largely escapes to the lower side, and the rise of the opening edge of the spinning solution introduction hole is reduced. Further, since the diameter of the upper portion of the straight portion is larger than the diameter of the spinning solution introduction hole, it is possible to prevent the punch tool from entering too deeply, and to further suppress the bulging of the peripheral edge of the opening at the end face of the large diameter portion. In addition, since there is a straight part with the same diameter as the spinning liquid introduction hole above the sharp part of the punch tool, even if there is a slight variation in the thickness of the spinneret material, there is a variation in the depth of the drilling liquid introduction hole. Even if there is, the opening diameter of the spinning solution introduction hole does not change and becomes constant. Further, as described above, the bulge of the opening periphery of the spinning liquid introduction hole is small, and the processing of the punch tool is perpendicular to the content of the spinneret material. Since they do not spread toward the periphery, the bulges of the opening edges of the adjacent spinning solution introduction holes do not interfere with each other, so that the spinning solution introduction holes are not deformed and all have a plane circular shape.

(Embodiment) An embodiment of the method for forming a spinning hole of a spinneret according to the present invention will be described. As shown in FIG. 1, the outer diameter of the flange 1a is 60 mm, the outer diameter of the spinning surface 1b is 50 mm, the depth is 10 mm, and the plate thickness. 0.3mm Pt-Au40wt%
As shown in FIG. 2, the bottom 2 of the dish-shaped spinneret 1 made of an alloy has a small sharp portion 6 having a taper angle of 41 degrees and a spinning solution to be drilled at the upper portion of the sharp portion 6. Inlet hole
Spinning liquid inlet hole 4a having an opening diameter of 0.2 mm using a punch tool having the same shape as 4a and having a straight portion 7 having a diameter of 0.2 mm and a length of 0.03 mm.
Were drilled at intervals of 0.33 mm. Thereafter, a spinning solution discharge hole 4b having an opening diameter of 0.66 mm was formed through the bottom of the spinning solution introduction hole 4a with another punch tool (not shown) as shown in FIG.

On the other hand, as a conventional example, a cone-shaped portion having a taper angle of 33 degrees at the tip as shown in FIG. 4 has a length of 0.30 mm at the bottom of a dish-shaped spinneret material 1 having the same dimensions and the same material as the above embodiment. 12,000 spinning liquid introduction holes 4a having an opening diameter of 0.2 mm were formed at intervals of 0.33 mm with a punch tool 3 having an outer diameter of 0.20 mm. Thereafter, a spinning solution discharge hole 4b having an opening diameter of 0.06 mm was formed through the bottom of the spinning solution introduction hole 4a with another punch tool (not shown) to obtain a spinning hole 4.

However, the spinning hole 4 of the spinneret of these examples and the conventional example was
As a result of the inspection, the spinneret of the conventional example has a large bulge 5 at the opening periphery of the spinning solution introduction hole 4a, and a variation in the opening diameter due to a variation in plate thickness and a variation in the depth of the spinning solution introduction hole 4a. While the spinning liquid introduction hole 4a was as large as 0.05 mm, and the spinning liquid introduction hole 4a was deformed due to the interference of the bulge 5 of the opening peripheral edge of the adjacent spinning liquid introduction hole 4a, the spinneret of the embodiment was the same as the spinning liquid introduction hole 4a. The bulge 5 at the periphery of the opening is small, and the variation in plate thickness is as small as 0.2 mm ± 0.02 due to variation in the opening diameter due to variation in the depth of the spinning solution introduction hole 4a.
Further, a bulge 5 at the opening edge of the adjacent spinning solution introduction hole 4a.
There was no interference and no deformation of the spinning solution introduction hole 4a. This is a small conical sharp point 6 and its sharp point 6
The spinning solution introduction hole 4a is formed by a punch tool 8 having a straight portion 7 having the same diameter as the spinning solution introduction hole 4a to be drilled at the upper part of the spinning solution.
There is nothing other than drilling.

(Effects of the Invention) As can be understood from the above description, according to the spinneret spinning hole forming method of the present invention, it is possible to reduce the bulge generated at the periphery of the opening of the spinning solution introduction hole, and to reduce the thickness and spinning of the spinneret material. Even if there is variation in the depth of the liquid introduction hole, there is almost no variation in the spinning liquid introduction hole, and there is no interference with the bulging of the opening edge of the adjacent spinning liquid introduction hole, and the spinning liquid introduction hole does not deform, etc. Has the effect.

[Brief description of the drawings]

1 to 3 are views showing a method of perforating a spinning hole of a spinneret of the present invention, and FIG. 4 is a view showing a conventional method of perforating a spinning hole of a spinneret.

Claims (1)

(57) [Claims] 1. A method for forming a spinning hole of a spinneret, comprising: a small conical sharp portion at a tip and a straight portion having the same diameter as a spinning solution introduction hole above the sharp portion; A spinneret having a larger diameter than the spinning solution introduction hole, and a spinning solution introduction hole formed at a conical sharp portion and a straight portion of the punching tool. Hole drilling method.