JPS5916633A - Manufacture of spinneret - Google Patents

Abstract

PURPOSE:To prevent hole clogging of an original liquid discharge hole at the time of spinning, and to obtain easily a spinning nozzle for spinning a thread having a good quality, by providing an organic solvent onto the upper face of a spinneret material, and thereafter, piercing an original liquid leading-in hole, in case of manufacture of a spinneret. CONSTITUTION:An organic solvent 7 is provided to the upper face of a spinneret material 1 consisting of Ta, and thereafter, an original liquid leading-in hole 3 is pierced by a punch tool 2, and thereafter, an original liquid discharge hole is pierced in the bottom of the original liquid leading-in hole 3 in the same way as before. As a result, even if the tip part of the punch tool 2 and the spinneret material 1 are heated by friction at the time of working, which is caused between the tip part of the tool 2 and the mouth piece material 1, the organic solvent 7 takes its heat and evaporates. Therefore, it is not stuck by seizure to the tip part of the tool 2, and the wall face of the pierced original liquid leading-in hole 3 becomes a specular face.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a spinneret, and particularly to a spinneret for wet spinning having a large number of fine spinning holes, and the material thereof is T.
The present invention relates to a method for producing a spinneret comprising a.

Traditionally, acrylic yarns are produced using wet spinning methods.

There are staves and fibers such as rayon, and the material of the spinneret used in the wet spinning method is, for example, stainless steel in the case of acrylic, Ta or noble metal in the case of rayon.

By the way, there are various methods for forming a large number of fine spinning holes in such a spinneret material, but for example, in the case of electrical discharge machining or cutting, the walls of the resulting spinning holes are extremely rough; During spinning, the stock solution accumulates and sticks to the unevenness of the wall surface,
Problems such as uneven thickness of the spun yarn and clogged spinning holes occur.

For this reason, the spinning hole of the spinneret requires a very smooth wall surface that is close to a mirror surface, so many fine spinning holes are formed in the spinneret material using a plastic working method using a puncher tool.

However, even this plastic working method has its problems, and processing troubles are particularly likely to occur when the material of the spinneret is Ta. This is a phenomenon in which, as shown in FIG. 1, when the stock solution introduction holes 3 are made in the spinneret material 1 with the puncher tool 2, the tip of the puncher tool 2 breaks after about 1,000 to 2,000 holes are formed. Further, even if it does not break, the wall surface of the drilled stock solution introduction hole 3 gradually becomes dull and rough.

As mentioned above, even if the tip of the puncher 2 does not break, the wall surface of the stock solution introduction hole 3 becomes rough due to the fact that the spinneret material 1
The T of the spinneret material 1 is heated as shown in FIG.
a seizes and adheres to the tip of the punching tool 2 and gradually grows as the stock solution introduction hole 3 is drilled, so that the wall surface of the stock solution introduction hole 3 to be drilled is covered with the stuck material 4 on the tip of the punching tool 2. This is because the unevenness causes sushi-like scratches or uneven scratches. Also, the tip of the punching tool 2 will break if it is covered with a fixed object 4 to the extent that the tip of the punching tool 2 breaks.
When the sipante tool 2 moves upward due to the crimping between the stuck object 4 and the spinneret material 1, the tip part cannot withstand the tensile strength.
This is because it will break.

When spinning using a spinneret with uneven or sliver-like scratches on the wall surface of the stock solution introduction hole 3 as described above, the stock solution adheres and accumulates on uneven parts of the wall surface of the stock solution introduction hole 3. Even if the number of holes does not become clogged, the thickness of the spun yarn will be uneven.

For this reason, attempts were made to apply IK oil to the spinneret material and drill the stock solution introduction hole 3, but the puncher tool 2
When the tip of the punch tool 2 penetrates into the Ta material to the extent that the tip of the puncher tool 2 enters the Ta material, the oil film of the lubricating oil 6 is completely cut off and disappears as shown in FIG. Since the temperature is increased and the lubricant 6 does not quickly remove the heat from the tip of the punching tool 2, Ta is fixed to the tip of the punching tool 2, and the stock solution introduction hole 3 is drilled. As the process progressed, the adhered substances grew and stuck to the spinneret material 1, causing breakage, or even if the breakage did not occur, the wall surface of the drilled stock solution introduction hole 3 was extremely rough. .

The present invention was developed in view of the above circumstances, and is an fc type. The holes can be drilled to a mirror-like finish without causing any damage, and the tip of the puncher tool can be drilled without breaking. Therefore, the stock solution discharge hole does not get clogged during spinning, and the thickness of the yarn can be improved. It is an object of the present invention to provide a method for manufacturing a spinneret that can spin yarn of good quality without causing unevenness.

The method for manufacturing the spinneret of the present invention is as shown in FIG.
An organic solvent 9, for example 1
．． 1. After disposing the 2-trichlorotrifluoroethylene P77, use the puncher tool 2 to punch the stock solution introduction hole 3, and then drill the stock solution discharge hole at the bottom of the stock solution introduction hole 3 in the same manner as before (not shown). ).

As described above, in the spinneret manufacturing method of the present invention, the organic solvent 7 is placed on the upper surface of the spinneret material 1 before the stock solution introduction hole 3 is formed in the spinneret material 1. When the introduction hole 3 is bored, the temperature of the tip of the puncher 2 and the spinneret material 1 is increased due to friction generated during processing between the tip of the puncher 2 and the spinneret material 1. Also, organic solvent 7
absorbs the heat and evaporates, so the tip of the puncher tool 2 and the spinneret material 1 are cooled. Therefore, since the Ta of the spinneret material 1 does not seize and stick to the tip of the puncher tool 2, the tip of the puncher tool 2 will not break and the wall surface of the drilled stock solution introduction hole 3 will be completely covered. It becomes a smooth mirror surface.

Thus, when spinning with the spinneret made by the manufacturing method of the present invention, the stock solution introduced into the introduction hole 3 flows smoothly into the stock solution discharge hole because the wall surface of the introduction hole 3 has a mirror surface. This prevents the stock solution discharge hole from becoming clogged, and the spun yarn has no uneven thickness.

As can be seen from the above explanation, the spinneret manufacturing method of the present invention involves drilling a stock solution introduction hole in the spinneret material in manufacturing a wet spinning nozzle made of Ta material having a large number of fine spinning holes. Since the organic solvent is applied before spinning, even if the tip of the puncher and the spinneret plate are heated due to friction when the raw solution introduction hole is punched with a puncher, the organic solvent will absorb the heat. It is cooled because it is removed and evaporated. Therefore, the Ta of the spinneret material does not seize and stick to the tip of the puncher, and the wall surface of the solution inlet hole becomes a mirror surface. An excellent effect is that it is possible to easily obtain a spinneret that can spin yarn of good quality without causing unevenness.

[Brief explanation of the drawing]

Fig. 1 is a partial vertical cross-sectional view showing a method for forming a stock solution introduction hole in a conventional spinneret manufacturing method, and Fig. 2 shows a stock solution introduction hole obtained by the method for forming a stock solution introduction hole. FIG. 3 is a partial vertical cross-sectional view showing the state of the wall surface of the spinneret, and FIG.
FIG. 4 is a partial vertical sectional view showing another conventional method for forming a stock solution introduction hole, and FIG. 5 is a stock solution introduction hole in the spinneret manufacturing method of the present invention. FIG. 1... Spinneret material, 2... Puncher tool, 3... Stock solution introduction hole, 7... Organic solvent. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. 185- Regret

Claims (1)

[Claims] In a method for manufacturing a spinneret, in which a spinning hole consisting of a raw solution introduction hole and a continuous solution discharge hole is formed in a spinneret material made of Ta) by a plastic working method, an organic material is formed on the upper surface of the spinneret material. 1. A method for manufacturing a spinneret, which comprises drilling a stock solution introduction hole after applying a solvent.