JPH0154442B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a protruding nozzle in a spinneret for spinning chemical fibers.

(Prior art) Spinneret for spinning chemical fibers (hereinafter referred to as spinneret)
The spinning nozzle (hereinafter referred to as discharge hole) corresponding to the fineness of the fiber has a shape such as a dish shape, a cap shape, a plate shape, etc., with one or more holes bored in the spinneret body, and the discharge hole is The diameter of the hole is approximately in the range of 0.04 to 0.3 m/m, and is made of metal such as gold-platinum alloy, rhodium alloy, or stainless steel.

Conventionally, in order to manufacture a protruding nozzle in this spinneret, a spinneret 1 as shown in FIG.
A blind hole-shaped polymer guide hole 2 is bored with a drill or a punch tool (not shown), and then the bulge 4 formed on the spinning surface 3 of the spinneret is polished, etc. as shown in FIG. 1b. The solution is shown in Figure 1c.
As shown in the figure, insert a punch tool 5 at the bottom of the polymer guide hole 2.
At the same time, the discharge hole 6 is drilled through the discharge hole 6.
A protrusion 7 is formed on the periphery of the tip.

(Problem to be Solved by the Invention) However, among the spinnerets 1, a spinneret made of austenitic stainless steel has about 1,000 to 2,000 holes when the discharge holes 6 are punched through the punch tool 5. Due to the drilling process, the inner wall surface of the discharge hole 6 becomes a dull, rough surface, resulting in a poor quality spinneret.

The reason why the inner wall surface of the discharge hole 6 becomes a dull and rough surface as described above is because a seizure phenomenon occurs between the punch tool 5 and the spinneret 1 made of stainless steel material during the drilling process shown in FIG. As shown in FIG. 2, abrasion powder of the stainless steel material adheres to the tip 5a of the punch tool 5, and deposits 8 thereof grow.

When about 1,000 to 2,000 holes are punched, the deposits 8 scrape the inner wall surface of the discharge hole 6 when the punch tool 5 moves upward, resulting in a dull, rough surface.

Therefore, in order to prevent the tip 5a of the punch tool 5 from seizing, conventionally, as shown in FIG. However, as shown in FIG. 3b, the lubricating oil 9 does not flow to the tip 5a of the punch tool 5 near the deepest part of the discharge hole 6. Tool 5 had almost no anti-seize effect.

The present invention was made in view of the above-mentioned problems, and its purpose is to penetrate the discharge hole with a punch tool into the bottom of thousands of polymer guide holes when manufacturing a protruding nozzle in a spinneret. We manufacture a protrusion nozzle that does not cause the punch tool to seize even when drilling, the inner wall surface of all discharge holes has a mirror gloss, and a protrusion with uniform height and flatness is formed on the periphery of the tip of the discharge hole. The goal is to provide a method to do so.

(Means for Solving the Problems and Their Effects) As a result of various studies to overcome the above-mentioned problems, the inventors of the present invention set up a plate material impregnated with lubricating oil at the bottom of a spinneret to form a discharge hole. We have found a way to drill holes. That is, the gist of the present invention is to place a plate material impregnated with lubricating oil on the top surface of the base material, place and fix a spinneret having a polymer guide hole pre-drilled in the form of a blind hole thereon, Next, a method for manufacturing a protrusion nozzle in a spinneret, which comprises punching a discharge hole by penetrating the bottom of the polymer guide hole of the spinneret with a punch tool, and forming a protrusion on the periphery of the tip of the discharge hole. be.

The structure and operation of the present invention will be explained below. As shown in FIG. 4a, a plate material 12 impregnated with lubricating oil is placed on the upper surface of the base material 10.

The plate material must be capable of being impregnated with lubricating oil, and in the present invention, a spongy thin plate made of sintered metal or a fine lattice mesh plate is used. Bronze, stainless steel, copper, brass, etc. are used as the sintered metal.

Since the sintered metal is used for various purposes, its manufacturing method has been established, and one example of the manufacturing method for use in the present invention is as follows.

Brass spherical particles (particle size 0.15mm) diameter 90mm depth
Fill an appropriate amount into a 70mm bottomed cylindrical mold,
Compress from the top with a force of about 3t/ ^cm2 . Through this operation, the brass particles are bonded to each other, and the thickness is 5 mm and the diameter is 90 mm.
Obtain a thin plate of This thin plate is sintered between particles at approximately 750°C (below the melting point of brass) in an electric furnace.

This sintered metal is different from those made by melting and casting, and the product material is spongy (with fine pores inside).
It is. Usually, metal spherical powder with a particle size of 0.1 to 0.5 mm is used, and it is preferable to sinter the powder to have a porosity of 30 to 40% by volume in terms of lubricating oil impregnation and deformation resistance against compression. Next, the fine lattice mesh plate is made by layering wire mesh (cloth-like) woven from stainless steel wire with a diameter of 0.05 mm to a thickness of about 5 mm and a diameter of 90 mm.
Cut into a circular shape and secure the surrounding area with a stainless steel frame.

Since this fine lattice-like mesh plate is also a layered wire mesh made of fine wires, it has a large internal porosity and is easily impregnated with lubricating oil.

Next, as shown in FIG. 4a, a polymer guide hole 2 is formed in advance in the form of a blind hole on a plate material 12 impregnated with lubricating oil (the impregnation method will be explained in the examples below). Place spinneret 1. Then, the base material 10, plate material 12, and spinneret 1 are fixed by some means. Next, as shown in FIG. 4b, the bottom of the polymer guide hole 2 of the spinneret 1 is penetrated with a punch tool 5 to form a discharge hole 6, and at the same time, a protrusion 13 is formed on the periphery of the tip of the discharge hole 6. .

By drilling the discharge hole 6 in this way, the tip 5a' of the punch tool 5 that has passed through the discharge hole 6 can be
As shown in the figure, since the punch tool 5 does not pierce the plate material 12 impregnated with lubricating oil and restrain the punch tool 5, the periphery of the discharge hole 6 is pushed out without force, and a protrusion 13 is formed at the periphery of the tip of the discharge hole 6. Ru.

The lubricating oil contained in the plate material 12 adheres to the tip 5a' of the punch tool 5 as shown in FIG. It acts as a lubricant until it is completely removed. Then, the tip 5a' of the punch tool 5 again pierces the plate material 12 impregnated with lubricant, so that the tip 5a' of the punch tool 5 is coated with lubricant. In this way, each time a discharge hole 6 is penetrated through the bottom of a large number of polymer guide holes 2 and a protrusion 13 is formed on the periphery of the tip, the components of the plate material 12 containing the lubricating oil attached to the tip 5a' of the punch tool 5 are removed. The deposit 14 acts as a lubricant and disappears. Therefore, the tip 5a of the punch tool 5 does not seize on the spinneret 1, and
Since the inner wall surfaces of the discharge holes 6 are not scraped, the inner wall surfaces of all the discharge holes 6 formed through the discharge holes 6 have a mirror-like luster.

After drilling discharge holes 6 through the bottoms of all polymer guide holes 2 of the spinneret 1 and forming projections 13 on the spinning surface 1a, the projections 13 are polished to form the spinneret 15 as shown in FIG. Complete it.

A more specific explanation will be given below based on Examples.

(Example) FIG. 7 shows an example of a spinneret etc. for carrying out the present invention. In the figure, row a is a perspective view of each component, and row b is a cross section of the same. A is the spinneret, the upper collar part has a diameter of 100 mm, and the lower part has a diameter of 100 mm.
80mm and height 10mm. Thickness of spinneret plate is 0.5
mm, and 2 in row b is a polymer pore with a diameter of approximately
10,000 blind holes of 0.3 mm are drilled. Next B
is a spongy thin plate made of sintered brass metal with a thickness of 5
mm, diameter 90mm. Further, C and D are jigs for fixing the above A and B, and the bottom plate of jig D is the 4th and 5th jigs.
This becomes the base material 10 in the figure.

And c is a cross-sectional view of the above-mentioned A to D assembled and fixed. Next, to impregnate lubricating oil, put lubricating oil in the bottom of jig D before setting the spongy thin plate.
When a spongy thin plate is set there, the lubricating oil penetrates into the inside by capillary action and is retained because it is a porous material as described above.

Then, the spinneret 1 is set in the state shown in FIG. individual portion i.e.
Even when the discharge hole was drilled through 10,000 polymer guide holes, there was no need to replace the punch tool, and the inner wall surface of the discharge hole had a mirror gloss.

(Effects of the Invention) According to the method of manufacturing a protruding nozzle in a spinneret according to the present invention, when a discharge hole is punched through the bottom of a polymer guide hole with a punch tool, it is possible to
After punching about 2,000 holes, the punch tool's lifespan was reached due to seizure, and the punch had to be replaced.However, even after punching 10,000 holes or more, there is no need to replace the punch. Also, conventionally, 1000
However, according to the present invention, the inner wall surface of the ejection hole has a specular gloss even after about 10,000 holes are formed. In the conventional technique, the punch was replaced 4 to 5 times to make one spinneret, but according to the present invention, this is not necessary. Furthermore, according to the present invention, it is possible to manufacture a spinneret having a protrusion nozzle of good quality in which protrusions having uniform height and flatness are formed on the periphery of the distal end of the discharge hole.

[Brief explanation of drawings]

Figures 1 a to c are cross-sectional views of main parts showing the steps of a conventional method for manufacturing a protruding nozzle in a spinneret, and Figure 2 is a seizure of the punch tool caused by the manufacturing method shown in Figures 1 a to c. FIGS. 3a and 3b are enlarged cross-sectional views of the discharge hole showing defects caused by the phenomenon; FIGS. 5 is a cross-sectional view of a main part and an enlarged cross-sectional view of a main part, FIG. FIG. 6 is an enlarged cross-sectional view of the main part showing a spongy thin plate component containing a lubricant attached to the tip of the tool, and FIG. 6 is a cross-sectional view of the main part of the spinneret completed by finishing molding. FIG. 7 is a perspective view and a sectional view showing a spinneret and the like for carrying out the present invention. 1... Spinneret, 2... Polymer guide hole, 5...
Punch tool, 6...Discharge hole, 10...Base material, 12
... Plate material impregnated with lubricating oil, A ... Spinneret, B
... Spongy thin plate, C, D... Jig.

Claims (1)

[Claims] 1 Place a board material impregnated with lubricating oil on the top surface of the base material,
A spinneret having a polymer guide hole pre-drilled in the form of a blind hole is placed and fixed thereon, and then a discharge hole is punched by piercing the bottom of the polymer guide hole of the spinneret with a punch tool. A method for manufacturing a protrusion nozzle in a spinneret, characterized in that a protrusion is formed at the periphery of the tip of the discharge hole.