JPH0280132A - Method for making spinning holes of spinning mouthpiece - Google Patents

Abstract

PURPOSE:To reduce bulging around the openings of introducing holes by making spinning solution introducing holes with a punch tool having a conical, small and sharp part on the point and a straight part of the same diameter as the diameter of the spinning solution introducing hole on the upper part of the sharp part. CONSTITUTION:The spinning solution introducing holes 4a are made with the punch tool 8 having a conical, small and sharp part 6 on the point and the straight part of the same diameter as the spinning solution hole 4a on the upper part of the sharp part 6. Then, the majority of the material of a part of the spinning solution introducing hole 4a in the spinning mouthpiece stock 1 flows on the lower side and the bulging 5 reduces around the opening of the spinning solution introducing hole 4a. Besides, since the upper part of the sharp part 6 of the punch tool 8 has a straight part 7 of the same diameter as the diameter of the spinning solution introducing hole 4a, the diameter of the opening of the spinning solution introducing hole 4a does not vary and is fixed notwithstanding that the plate thickness of the spinning mouthpiece stock 1 varies slightly or the depth of the spinning solution introducing hole 4a varies.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for drilling spinholes in a spinneret for spinning chemical field fibers.

(Prior Art) Conventionally, in order to form a spinning hole in a spinneret, a patch having a conically pointed tip is simply attached to the bottom 2 of a spinneret material 1 formed into a dish shape as shown in FIG. Several tens to tens of thousands of spinning holes 4, more specifically, spinning solution introduction holes 4a of the spinning holes 4, are bored using a tool 3, and then the spinning solution is discharged into the bottom of the spinning solution introduction holes 4a using another patch tool. Hole 4b was bored.

(Problem to be Solved by the Invention) By the way, in the method for forming the spinning hole 4 described above, when the spinneret material 1 is a soft material such as Pt-ΔuSTa, when the spinning solution introduction hole 4a is formed and shaped, The opening periphery of the spinning solution introduction hole 4a is located at the fourth point along the outer circumferential surface of the tip of the patch tool 3.
Since it bulges as shown in the figure, it takes time and effort to scrape off this bulge 5. Furthermore, if there are variations in the thickness of the spinneret material I and the depth of the spinning solution introduction holes to be drilled and shaped, there will be variations in the opening diameter of the spinning solution introduction holes.

Further, as described above (if a bulge 5 is formed around the opening of the spinning solution introduction hole 4a), the adjacent spinning solution introduction holes 4a may be deformed due to the interference of this bulge 5, and may not form a perfect circle on a plane.

(Object of the Invention) The present invention has been made to solve the above problems, and it is possible to reduce the swelling that occurs around the opening of the spinning solution introduction hole.
In addition, even if there are variations in the thickness of the spinneret material or the depth of the spinning solution introduction holes to be drilled and shaped, there is almost no variation in the opening diameter of the spinning solution introduction holes, and furthermore, there is almost no variation in the opening diameter of the spinning solution introduction holes. It is an object of the present invention to provide a method for forming a spinning hole in a spinneret that does not cause deformation.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the method for forming a spinning hole in a spinneret according to the present invention has a method for forming a spinning hole in a spinneret. The invention is characterized in that a spinning solution introduction hole is bored in the upper part of the sharp part using a patch tool having a straight part with a diameter of a spinning solution introduction hole.

(Function) As described above, the method for drilling a spinning hole in a spinneret according to the present invention uses a patch tool having a small conical sharp point at the tip and a straight part having the same diameter as the spinning solution introduction hole above the sharp point. Since the spinning solution introduction hole is bored through the spinneret material, much of the material in the spinning solution introduction hole portion of the spinneret material escapes downward, and the swelling around the opening of the spinning solution introduction hole is reduced. In addition, since the patch tool has a straight part with the same diameter as the spinning solution introduction hole above the sharp part, even if there is slight variation in the thickness of the spinneret material, there will be no variation in the depth of the drilled spinning solution introduction hole. Even if there is, the opening diameter of the spinning solution introduction hole does not change and remains constant.

Furthermore, as mentioned above, there is little bulge around the opening of the spinning solution introduction hole, and the processed part of the patch tool is perpendicular to the inner surface of the spinneret material, so that the spinning solution introduction hole can be turned on.
n Since the peripheral bulge does not spread upward to the periphery, the bulges on the opening periphery of adjacent spinning solution introduction holes do not interfere with each other, and therefore the spinning solution introduction holes are not deformed and all form a circular plane.

(Example) To explain one example of the method for forming a spinning hole in a spinneret of the present invention, as shown in Figure 51, the outer diameter of the flange 1a is 60 m.
m, outer diameter of spinning surface 1b 50 mm, depth 10 mm, plate thickness 0
．． As shown in FIG. 2, on the bottom 2 of a dish-shaped spinneret material 1 made of a 3 mm P t -A u 40 wt% alloy, there is a small conical sharp point 6 with a taper angle of 41 degrees at the tip and the sharp point 6.
A spinning solution introduction hole with an opening diameter of 0.2 mm is used with a patch tool 8 having a straight part 7 with a diameter of 0.2 mm and a length of 0.03 mm, which is the same diameter as the spinning solution introduction hole 4a to be drilled in the upper part of the spinning solution introduction hole 4a. 4a, 12,000 holes were drilled at 0.33 mm intervals.

Thereafter, a spinning solution discharge hole 4b having an opening diameter of 0.66 mm was drilled through the bottom of the spinning solution introduction hole 4a using another patch tool (not shown), as shown in FIG. 3, to obtain a spinning hole 4. .

On the other hand, as a conventional example, on the bottom of a dish-shaped spinneret material l having the same dimensions and the same material as those of the above embodiment, there is a conical pointed part with a taper angle of 33 degrees at the tip with a length of 0°30 m, as shown in Fig.
m, and the spinning solution introduction hole 4a with an opening diameter of 0.2+mn is opened by the patch tool 3 with an outer diameter of 0.20+n+n to 0.33+yu.
12,000 holes were drilled at intervals of a. After that, use another patch tool (not shown) to attach the opening diameter to the bottom of the spinning solution introduction hole 4a.
．． A spinning solution discharge hole 4b with a diameter of 0.06 mm was drilled through the yarn to obtain a spinning hole 4.

However, when the spinning holes 4 of the spinnerets of these embodiments and conventional examples were inspected, it was found that in the conventional spinneret, there was a large bulge 5 around the opening of the spinning solution introduction hole 4a, and there were also variations in plate thickness and problems with the spinning solution introduction hole. The variation in the opening diameter due to the variation in the depth of the spinning solution introduction hole 4a was as large as 01±0.05mm, and there were many deformations of the spinning solution introduction hole 4a due to the interference of the swell 5 on the opening periphery of the adjacent spinning solution introduction hole 4a. On the other hand, in the spinneret of the example, the bulge 5 around the opening of the spinning solution introduction hole 4a is small, and the variation in plate thickness is small.
Variation in opening diameter due to variation in depth of a is 0.2m
Small m±0.02, and adjacent spinning solution introduction hole 4
The spinning solution introduction hole 4 is free from interference from the swell 5 on the opening edge of a.
There was no deformation of a. This is done simply by using a patch tool 8 having a small conical sharp point 6 at the tip and a straight part 7 having the same diameter as the spinning solution introducing hole 4a to be drilled above the sharp point 6. This is only because the holes are drilled.

(Effects of the Invention) As can be seen from the above explanation, according to the method for forming a spinning hole in a spinneret of the present invention, it is possible to reduce the swelling that occurs around the opening of the spinning solution introduction hole, and also to reduce the thickness of the spinneret material and the spinning Even if there is variation in the depth of the spinning solution introduction hole, there is almost no variation in the spinning solution introduction hole, and furthermore, there is no interference between the raised edges of the opening edges of adjacent spinning solution introduction holes, so the spinning solution introduction hole is not deformed, etc. There is an effect.

[Brief explanation of the drawing]

FIGS. 1 to 3 are views showing a method for forming a spinhole in a spinneret according to the present invention, and FIG. 4 is a view showing a method for forming a spinhole in a conventional spinneret. Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. 4Q.

Claims (1)

[Claims] 1. When drilling the spinning hole of the spinneret, the spinning solution is introduced using a patch tool that has a small conical sharp point at the tip and a straight section with the same diameter as the spinning solution introduction hole above the sharp point. 1. A method for forming a spinneret in a spinneret, the method comprising forming a hole.