JPS5997817A - Manufacturing method of nozzle plate - Google Patents

Abstract

PURPOSE:To provide an excellent nozzle plate, by first making the discharge opening of the material solution nearly the same as but somewhat smaller than a predetermined size by a melting method such as electric discharging and then by finishing the opening into the predetermined size with punching tools. CONSTITUTION:A blind hole for material solution intake 5 is provided in a material plate 7 for the nozzle plate. After providing an opening 4' nearly the same as but smaller than the size of the material solution discharge opening 4 in T-shape at the bottom of the hole 5, the slit hole 2' in the opening 4' is finished into a slit hole 2 of a predetermined size by plastic working with punching tools. Then, a slit hole 1' is provided in the opening 4' with punching tools, and the hole 1' is then enlarged gradually by plastic working with punching tools into a lateral slit hole 1 of a predetermined size, and thus, the material solution discharge opening 4 can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for manufacturing a spinneret, in particular, a spinneret in which the cross-sectional shape of the raw solution discharge hole is T-shaped.

Conventionally, there are various methods for manufacturing a spinneret in which the cross-sectional shape of the raw solution discharge hole is T-shaped. The most common method is to drill a blind solution introduction hole in the spinneret plate.
In this method, an undiluted solution discharge hole is punched approximately in the center of the bottom by plastic working with a punch tool having a T-shaped cross section.

However, there is a limit to the size of the stock solution discharge hole that can be flied by this method, the so-called capillary length.
1m.

When the length becomes about 0.5+u+, the punch shell becomes weak and easily breaks, so when the gear pillar length becomes 0.11 or more, processing becomes extremely difficult, and the production of spun gold becomes virtually impossible. It becomes impossible. Also, the capillary length is 0,1
Even if it is less than 1, not only will the life of the stock solution discharge hole be shortened due to wear, but also the thickness of the yarn will be uneven, resulting in poor quality as a spinneret.

For this reason, for example, after machining a stock solution discharge hole that is smaller than a predetermined size using electrical discharge machining, the melt-processed surface of the stock solution discharge hole is removed using a punch tool.
Furthermore, a method is adopted in which a similar stock solution discharge hole is drilled little by little with a larger puncher, and a discharge TL is bored in the stock solution 1 of a predetermined size having a mirror-finished inner wall surface.

There is a limit to the length of the capillary that can be fjF when an approximate stock solution discharge hole is melt-processed using the electric discharge machining method, but as mentioned above, the width of the slit hole on one side of the T-shaped stock solution discharge hole is 0.05 mm, When the W is about 0.5 mm, the capillary thickness can be processed to about 1s+n (3), and unevenness in the thickness during spinning does not occur. And by welding: By removing the unevenness of the seven sides and making it a mirror surface, it may obstruct the flow of the spinning solution, cause the spinning solution to stick, or cause scratches on the spun yarn, reducing its strength. This solves the problem of color unevenness during dyeing. In addition, by slightly enlarging the approximate stock solution discharge hole obtained by electrical discharge machining using a plastic working method, the amount of machining per punch tool can be reduced, and the wall surface of the stock solution discharge hole that is No unevenness occurs.

However, even this manufacturing method has the following problems. The reason is that the shape of the stock solution discharge hole, which has a T-shaped cross section, exhibits an R at the orthogonal part of the vertical slit hole and the horizontal slit hole, and the cross section of the yarn obtained from the stock solution discharge hole with such a shape is sharp. There is no place, and the outer surface of the orthogonal part becomes a curved thread.

This is because when manufacturing a puncher tool for finishing the stock solution discharge hole, the angle of the orthogonal part of the T-shaped part is 90 degrees or 111B right angle because the wear of the partner shaping tool is significant (4), so it is originally 90 degrees. Alternatively, the approximately right-angled portion has a curved surface shape, and therefore, the yarn spun from the stock solution discharge hole punched with such a puncher has a rough shape, and naturally the outer surface of the orthogonal portion has no sharp points. This is only possible because it is a curved surface. To explain this in more detail, since the punch tool is made of a relatively strong and hard material such as S K 0 grade tool steel, in order to shape it into a punch tool of a predetermined size, diamond-containing material is used. For example, if you want to obtain a punch tool with a 90 degree angle, the shaping tool itself needs to be shaped at 90 degrees, so the strength of the tip of the vertical tool is weak. Naturally, when shaping the punching tool, there is considerable wear, and the resulting punching tool has a large curvature at the right angle part, so the spun yarn is discharged from the stock solution discharge hole created by punching with this punching tool. The resulting thread lacked sharpness, and the outer surface of the orthogonal portion was curved.

For this reason, for example, a so-called slit-shaped punching tool is created by dividing the T-shaped punching tool into one shape and one shape. Attempts have been made to create a undiluted liquid discharge hole in which the horizontal slit hole and the vertical slit hole are slightly enlarged one by one or alternately to achieve a predetermined size. I got it. This is because when the horizontal slit hole 1 and the vertical slit hole 2 are enlarged little by little with a slit-shaped punching tool as shown in FIG. This is because the orthogonal portions of the stock solution discharge holes 4 are extremely sharp.

However, even this processing method has drawbacks.

As shown in Fig. 2, when machining the horizontal slint 1 to hole 1, the slit-shaped puncher 3 can always machine approximately the center of the hole, but it is restricted from at least four directions. When machining the slotted hole 2 in the horizontal direction, the vertical slit hole 2 in the center of the horizontal slit hole 1 is not restricted by the opposing inner wall and can slide toward the horizontal slit hole 1. (6) As shown in Figures 3 and 4, sideways pickpocket rL 1
The central part of the slit hole 2 is recessed, or there is a recess 6, at least tin can be seen, and the wall on the opposite side that contacts the horizontal slit of the vertical slit hole 2 is on the inlet side of the stock solution discharge hole 4. Concave/'L/. Therefore, the yarn discharged and spun from the stock solution discharge hole 4 obtained in this way has variations in strength, and color unevenness occurs during dyeing. Also vertical Surin 1
~The wall on the opposite side of the hole 2 that is in contact with the horizontal slit hole 1 is recessed on the artificial side of the stock solution discharge fL4, so the length of the hole in that part is short and the shape of the obtained thread is unbalanced. be.

The present invention has been made to solve such problems,
To provide a method for producing spun L gold with sharp orthogonal parts of T-shaped stock solution discharge holes, no dents or scratches on the inner surface of the stock solution discharge holes, and without any variation in the length of the holes. This is what I am trying to do.

An embodiment of the method for producing a spinneret according to the present invention will be described below with reference to the drawings. As shown in FIGS. In manufacturing the spinneret 6 constructed as shown in FIG. As shown in Fig. 6, a vertical slit hole 2' in an approximation of the stock solution discharge hole 4', which is smaller than the T-shaped stock solution discharge hole 4, is formed by plastic working with a punch tool. After drilling, as shown in FIG. 6C, a narrow horizontal slit hole 1' is formed by plastic working with a punch tool.
Thereafter, this horizontal slit hole 1' is enlarged little by little by plastic working using a punching tool to form a horizontal slit hole 1 of a predetermined size, and a stock solution discharge hole 4 having a mirror wall is bored.

Next, to explain another embodiment, as shown in No. 71aa, a blind hole-shaped stock solution introduction hole 5 is bored in the spinneret metal plate 7, and the bottom of the stock solution introduction hole 5 is larger than the T-shaped stock solution discharge hole 4. A small approximate stock solution discharge hole 4' is drilled, and then a horizontal slit hole 2' in the stock solution discharge hole 4' and a narrower horizontal slit hole 1' are inserted using a punching tool as shown in Figure 7. Plasticity (8) Using a processing method, the material is alternately enlarged slightly and finished to a predetermined size, and a stock solution discharge hole 4 having a mirror wall is bored.

In this way, the method for manufacturing a spinneret of the present invention is as follows:
When drilling the stock l&discharge hole 4 with an F-shaped cross section connected to L5, the width of the horizontal slit hole 1 in the approximate stock solution discharge hole 4' that is smaller than the stock solution discharge hole 4 is at least a vertical slit. The approximate stock solution discharge hole 4' is made slightly larger by the plastic working method so that the width of the hole 2' is smaller than that of the hole 2'. During drilling, the slit-shaped punching tool is restrained from four directions, so that the punching tool does not slip. In this way, no marks or scratches occur in the center of the horizontal slit hole. The perpendicular portions of the stock solution discharge hole 4 having a T-shaped cross section are sharp, and there is no unevenness in the length of the hole. Therefore, the yarn discharged and spun from the stock solution discharge hole 4 obtained in this way has no variation in strength, no color unevenness occurs during dyeing, and the shape of the yarn is balanced.

(9) As can be seen from the above explanation, according to the method for manufacturing a spinneret of the present invention, there is no dent or scratch in the center of the horizontal slit hole in the stock solution discharge hole, which has a T-shaped cross section, and The orthogonal parts are sharp and the length of the hole is uniform, so there is no variation in the strength of the thread, and no uneven color occurs during dyeing.
This has the effect of providing an excellent spinneret capable of spun yarn with a balanced shape.

[Brief explanation of drawings]

Figures 1a and b are diagrams showing a method of drilling a stock solution discharge hole with a T-shaped cross section in a conventional spinneret manufacturing method, and Figure 2 shows a horizontal slit in a stock solution discharge hole with a T-shaped cross section. A diagram showing a state in which a dark blue slit hole is drilled after the hole is drilled,
3 and 4 are a plan view and a longitudinal sectional view of the spinning surface showing defects caused by the drilling of the stock solution discharge hole shown in FIG. 2, and FIG. 5a. 6b is a vertical cross-sectional view of a main part of a spinneret having a dope discharge hole with a T-shaped cross section and a plan view of its spinning surface; FIGS. FIGS. 7a and 7b are plan views showing the process and two culms of the spinning method of the present invention (10) [another embodiment of the method for producing 1-gold gold. 1-1--Horizontal slit hole in the stock solution discharge container, 1'
---m-horizontal slit hole in approximate stock solution discharge hole, 2---1 vertical slit hole in stock solution discharge hole, 2
' Approximate vertical slit hole in stock solution discharge hole, 4--
---1 stock solution discharge hole, 4'--approximate stock solution discharge hole smaller than the stock solution discharge hole, 5-- stock solution introduction hole, 6-
---Spinneret, 7.----Spinneret plate. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. (11) Figure 1 Figure 2 Figure 7-87

Claims (1)

[Scope of Claims] 1) In manufacturing a spinneret in which the cross-sectional shape of the stock solution discharge hole connected to the stock solution introduction hole is T-shaped, a blind stock solution introduction hole is bored in the spinneret plate. Then, the width of the horizontal slit hole in the approximate stock solution discharge hole smaller than the stock solution discharge hole is smaller than the width of the vertical slit hole at the bottom of the stock solution introduction hole, and then the approximate stock solution is discharged. 1. A method for producing a spinneret, which comprises: drilling a hole, and then gradually increasing the size of the approximate stock solution discharge hole using a plastic working method to create a stock solution discharge hole having a specular wall of a predetermined size. 2) Slightly enlarging the approximate stock solution discharge hole to create a stock solution discharge hole with a specular wall of a predetermined size is to create an approximate stock solution discharge hole after drilling a vertical slit hole of a predetermined size using a plastic working method. (1) A method for manufacturing a spinneret according to claim 1, characterized in that the narrow horizontal slit holes in the spinneret are gradually enlarged to a predetermined size by a plastic working method. 3) Slightly enlarge the approximate stock solution discharge hole (to create a stock solution discharge hole with a specular wall of a predetermined size), the vertical slotted throat hole in the approximate stock solution discharge hole and the narrower horizontal slot 2. The method of manufacturing a spinneret according to claim 1, wherein the slit holes are made to have a predetermined size by enlarging the slit holes alternately little by little by a plastic working method.