JP2856274B2 - Manufacturing method of spinneret - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a spinneret for spinning irregularly shaped yarn.

[0002]

2. Description of the Related Art A spinneret is usually formed by providing a number of spinning holes of a predetermined shape in a disk member made of steel, particularly stainless steel. When the cross section of the yarn to be spun is round, the spinning hole is formed as shown in FIGS. 16 and 17, for example, and a modified cross section (a cross section other than a round shape, for example, Y
In the case of a shape, a star, a cross, a triangle, etc.), the spinning hole is formed, for example, as shown in FIGS.

In FIG. 16 and FIG.
Shows a partial longitudinal section of a disk member constituting a spinneret, and a predetermined number of spinning holes 102 and 112 are formed in the disk members 101 and 111. The arrows indicate the flow direction of the molten fluid, for example, the molten synthetic resin. Hole 1 for spinning
Reference numerals 02 and 112 denote, in order from the upstream side, introduction portions 103 and 113 having a circular cross section and a tapered inner peripheral surface, and introduction holes 104 and 11 formed of straight holes having a circular cross section.
4. Constrained portions 105 and 115 each having a circular cross section and an inner peripheral surface formed as a tapered surface, and discharge holes 106 and 116 having the same cross section in the hole extending direction. In the case of a round cross-section yarn, the cross-sectional shape of the discharge hole portion 106 is formed in a circular shape as shown in FIG. 17, and in the case of a modified cross-section yarn, the cross section of the discharge hole portion 116 is, for example, as shown in FIG. As shown in FIG.

[0004] Of the spinning holes 102 and 112, the discharge holes 106 and 116, in particular, require extremely high finishing accuracy and have a hole diameter (hole maximum diameter) of 0.1 to 1.
The discharge holes 106 and 116 are usually formed by electric discharge machining because the diameter of the hole has to be as small as about 0 mm, and particularly in the case of a yarn cap with a modified cross section, the cross section of the hole has a modified cross section. That is, the aperture units 105 and 11
Up to 5, machining and finishing are performed by drilling, reaming, and the like, and the discharge holes 106 and 116 are formed by electric discharge machining.

[0005]

However, a spinning hole, particularly a spinning hole 11 having an irregular cross section, is formed by the processing method described above.
The conventional spinneret in which No. 2 is formed has the following problems. 18 and 19, a flat surface 117 is inevitably formed at the entrance of the discharge hole 116, that is, at the boundary between the discharge hole 116 and the throttle 115, due to processing. This flat surface 117 remains as shown in the figure even after the processing of the discharge hole portion 116. This flat surface 11
7 is a surface substantially perpendicular to the flow direction of the molten fluid,
This is likely to cause stagnation in this portion and cause a large pressure loss.

[0006] When the stagnation occurs, there is a possibility that a production trouble such as breakage of the spun yarn may be caused, or a problem in yarn quality may be caused. When the pressure loss increases, a higher pressure is required at the spinneret inlet, so that the spinneret portion and each component on the upstream side thereof need to have higher pressure resistance.

In the above-mentioned conventional machining method, since the discharge holes 116 must be subjected to electric discharge machining one by one, it takes time and effort for machining, and the spinneret becomes expensive. Variations in processing may cause variations in the hole accuracy of each of the finished discharge holes 116. When this variation increases, quality problems and troubles of the spun yarn are caused.

SUMMARY OF THE INVENTION It is an object of the present invention to substantially eliminate the stagnation, suppress the pressure loss to a very low level, and accurately set the cross-sectional shape of the spun yarn to a target shape. It is an object of the present invention to provide a method for producing a spinneret having a spinning hole that can be formed in the spinneret.

In particular, it is an object of the present invention to provide a method of manufacturing a spinneret which can facilitate hole processing and can greatly reduce the processing time and can be manufactured at low cost.

[0010]

According to the method of the present invention for producing a spinneret according to the present invention, a plurality of plate members are combined.
A combination member having a non-circular deformed cross-sectional shape is prepared, and the combination member is combined with an extension of the axis of the cylinder member on one end surface of the cylinder member having one end surface formed into a spherical surface. The members are joined so that their axes coincide with each other, integrated with the cylindrical member, the integrated member is formed into a male mold, and a ceramic material is arranged around the integrated member to form a spinning material having substantially the same shape as the integrated member. Forming a ceramic member having a use hole, and fixing the ceramic member in a mounting hole formed in the base body.

This method is particularly suitable for producing a spinneret having a three-dimensionally curved inner surface of the spinning hole in which the shape line of the inlet of the discharge hole does not substantially appear as described later.

Further, in the method of manufacturing a spinneret according to the present invention, a columnar pin member having a circular cross section, having a large-diameter portion and a small-diameter portion, and having both portions connected by a tapered portion is produced. Using a grinding means, a plurality of grooves extending in a direction along the axis of the pin member are engraved in the small-diameter portion and at least a part of the tapered portion of the pin member in the circumferential direction of the pin member, and the pin member is formed by molding. Forming a ceramic member having a spinning hole having substantially the same shape as the pin member by forming a ceramic material around the pin member as a mold, and fixing the ceramic member in a mounting hole formed in the base body; .

This method is particularly useful for producing a spinneret having a three-dimensionally curved spinning hole inner surface in which the shape line of the inlet portion of the discharge hole does not substantially appear as described later, and for forming the discharge hole portion. It is suitable for the production of a spinneret in which the width of the extending portion in the radial direction of the discharge hole portion having the irregular cross-sectional shape changes in the radial direction of the discharge hole portion.

In both of the above manufacturing methods, when a corner remains in the molded male mold, it is preferable that the corner is rounded by R processing. Further, if necessary, the above-mentioned male die or the hole after molding may be subjected to correction processing in order to increase the accuracy of the hole to be formed. A target spinneret is obtained by fixing the ceramic member manufactured as described above in each mounting hole formed by machining a metal disc member as a base body, for example, a metal disk member.

That is, the target spinneret manufactured by the manufacturing method according to the present invention has the following configuration. For example, in a spinneret having a large number of spinning holes having an introduction hole into which a spinning fluid is introduced, and a discharge hole having a smaller diameter than the introduction hole for discharging the fluid from the introduction hole, The cross section of the discharge hole is formed in a non-circular irregular shape, and the inlet of the discharge hole is formed such that the cross sectional irregular shape gradually develops along the flow direction of the fluid, and The width of the inner part in the radial direction of the discharge hole portion of the extended portion in the radial direction of the discharge hole portion having the irregular cross-sectional shape is smaller than the width of the outer portion in the radial direction of the discharge hole portion. It is a base.

The width of the extending portion in the radial direction of the discharge hole portion having the irregular cross-sectional shape of the discharge hole portion may be substantially linearly tapered in the radial direction of the discharge hole portion. It may be changed in a tapered shape.

Preferably, when viewed in the flow direction of the fluid, at least a part of the inner surface of the spinning hole connected to the inlet of the discharge hole substantially has a shape line of the inlet of the discharge hole. Not formed on a three-dimensional curved surface.

The spinning hole as described above can be formed in a ceramic member separate from the metal die body. That is, each spinning hole is formed in each ceramic member, and each ceramic member is a spinning die fixed in each mounting hole formed in the die body.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the method for producing a spinneret according to the present invention will be described below with reference to the drawings. First, an example of a target spinneret manufactured by the spinneret manufacturing method of the present invention will be described. 1 to 4
1 shows a spinneret according to an embodiment manufactured by the manufacturing method of the present invention, and shows a case where the spinneret is applied to a modified cross-section yarn base. 1 and 2, reference numeral 1 denotes the entire spinneret. The spinneret 1 has a metal disc member 2 as a spinneret main body, and a predetermined number (number of spinning holes) of the metal disc member 2 and a mounting hole 3 formed in a predetermined arrangement. And a ceramic member 5 having a spinning hole 4 fixed thereto.

The material of the metal disk member 2 is not particularly limited, and the heat resistance, pressure resistance,
Any material having corrosion resistance or the like may be used. Therefore, stainless steel conventionally used for a spinneret can be used. Further, in the present embodiment, the metal disc portion plate 2 is used as the base body, but the material of the base body is made of another material, for example, a ceramic member formed separately from the ceramic member 5 described below. You may comprise.

The material of the ceramic member 5 is not particularly limited, and a ceramic material containing alumina and zirconia can be used. Among them, zirconia ceramics having high hardness and high rigidity are preferable.

The ceramic member 5 has a spinning hole 4 inside, and in this embodiment, the outer peripheral surface is formed in a stepped shape as shown in FIG. The mounting hole 3 formed in the metal disk member 2 has a fitting portion 3a with the ceramic member 5 formed at the center in the plate thickness direction, and upper and lower portions 3b,
Each of the holes 3c has a hole diameter larger than the outer diameter of the ceramic member 5. After each ceramic member 5 is fitted into the fitting portion 3a of each mounting hole 3, a heat-resistant inorganic material is provided in a gap formed between the outer peripheral surface of the ceramic member 5 and the inner peripheral surface 3b, 3c of the mounting hole. The adhesive 6 is filled and solidified. By filling and solidifying the heat-resistant inorganic adhesive 6, the ceramic member 5 is firmly fixed in the mounting hole 3, and a gap which causes stagnation or the like is formed on the upper and lower surfaces of the spinneret. Is prevented.

The heat-resistant inorganic adhesive 6 is composed of a mixture of an inorganic powder, for example, a glass powder or a ceramic powder, and a heat-resistant adhesive or a binder.
It is solidified by heat treatment in a furnace (constant temperature bath, baking furnace, etc.).

In this embodiment, the ceramic member 5 is fixed in the mounting hole 3 by using the heat-resistant inorganic adhesive 6 as described above. However, the present invention is not limited to this, and the ceramic member 5 may be fixed by another method. . For example, the mounting hole 3 is formed substantially in the same shape as the outer peripheral shape of the ceramic member 5 over substantially the entire length, and a method of press-fitting the ceramic member 5 or a metal disk member 2 as a base body is used. Is heated to expand the hole diameter of the mounting hole 3 by thermal expansion, and after fitting the ceramic member 5 at room temperature or heated to the same temperature as the base body, the temperature of the disk member 2 is lowered and fixed. Etc. can also be adopted.

In the present embodiment, the spinning hole 4 formed in the ceramic member 5 is formed in the shape shown in FIGS. As shown in FIG. 3, the spinning hole 4 has a spinning fluid,
For example, from the upstream side as viewed in the flow direction (arrow direction) of the molten synthetic resin, a molten fluid is introduced into the hole from the upstream side. An inlet hole 8 formed of a straight hole having a circular cross section and connected to the inlet hole 8; a three-dimensional curved surface portion 9 connected to the inlet hole 8 and having a smooth three-dimensional curved surface whose diameter is reduced toward the downstream side; It is formed from a discharge hole portion 10 which is connected to the curved surface portion 9 and comprises a straight hole portion having a deformed cross section for discharging a molten fluid.

In this embodiment, the irregular cross section of the discharge hole 10 is formed in a Y-shape as shown in FIG. The three-dimensional curved surface portion 9 changes its surface shape smoothly, and when connected to the entrance portion 10a of the discharge hole portion 10, the shape line of the entrance portion 10a of the discharge hole portion 10 does not substantially appear. Connects smoothly. In FIG. 3, for convenience of description, the boundaries of the holes are indicated by broken lines, but these lines do not actually appear. In this embodiment, the boundary between the three-dimensional curved surface 9 and the introduction hole 8 is also connected via a smooth curved surface,
Also in this part, the shape line does not appear. Further, in the present embodiment, R is also provided at the boundary between the introduction portion 7 and the introduction hole portion 8, and this portion also transitions smoothly. Due to the connection state as described above, the discharge hole 10
In the inlet portion 10a, the irregular cross-sectional shape gradually develops along the flow direction of the fluid.

The irregular cross-sectional shape of the discharge hole portion 10 is not limited to the above-mentioned Y-shape, and a cross-sectional shape used for a known irregular cross-sectional yarn, for example, a star, a cross, a triangle, or the like can be adopted. In any cross-sectional shape, at least the introduction hole and the discharge hole may be smoothly connected by the three-dimensional curved surface so that the entrance shape line of the discharge hole does not appear.

The discharge hole portion 10 usually has a hole diameter (maximum diameter) of about 0.1 to 1.0 mm and a length of 0.1 to 1.0 mm.
0 mm, and the introduction hole 8 has a hole diameter of 1.0 to 5.0 mm.
It is about 0 mm. Since the discharge hole portion 10 has an irregular cross-section, the hole diameter is small, and precision is required, conventionally, only the electric discharge machining has been performed as described above. However, in this embodiment, the metal disc member 2 is used as the spinning hole 4 forming member.
The ceramic members 5 manufactured separately are used, and each ceramic member 5 can be easily and accurately manufactured in a short time in a substantially same process by a method as described below. It is.

In the spinning hole 4 having the above-described shape, the irregular cross-sectional shape gradually develops along the flow direction of the spinning fluid at the inlet portion 10a of the discharge hole portion 10. If the required accuracy of the irregular cross-sectional shape of the yarn to be produced is high, the following problem may occur.

That is, as schematically shown in FIG. 5 in a vertical section near the discharge hole, the formation of the three-dimensional curved surface 9 results in the entrance 10a of the discharge hole (including the portion immediately upstream thereof). The irregular cross-sectional shape gradually develops along the flow direction of the fluid. Assuming that the irregular cross-sectional shape of the discharge hole portion 10 is, for example, as shown in FIG. 6, the width W of the radially extending portion 13a of the discharge hole portion 10 is a constant shape 13,
The distance L between the fluid flowing into the extending portion 13a from the arrow F1 portion shown in FIG. 5 and the fluid flowing into the extending portion 13a from the arrow F2 portion reaches the outlet of the discharge hole portion 10.
There is a difference between 1 and L2, which results in a difference in pressure loss. This pressure loss is greater for fluids flowing over a distance of L1 and less for fluids flowing over a distance of L2. Therefore, the cross-sectional shape 13
The flow rate tends to be larger as approaching the central portion of the discharge hole portion 10 in the extension portion 13a (that is, radially inward of the discharge hole portion), and increasing as the distance from the central portion (that is, radially outward of the discharge hole portion) increases. Attempt to lower the flow rate. Therefore, the cross-sectional shape of the modified cross-section yarn discharged from the discharge hole portion 10 tends to be deformed as shown by a two-dot chain line 13b in FIG.

Therefore, in the present invention, when a more accurate cross-sectional shape is required, the cross-sectional shape of the discharge hole portion and / or the hole at the upstream portion thereof is changed to the shape shown in FIG.
It is modified as shown in In the example shown in FIG. 7, the width W1 of the extending portion 14a in the hole shape 14 is changed to a linear taper shape so as to become smaller toward the center of the hole. Fluid inflow area A shown in FIG.
In the case where the three-dimensional curved surface 9 extends substantially linearly in the longitudinal section, it is preferable to linearly change the width W1 in the corresponding region B in FIG. On the other hand, when the three-dimensional curved surface 9 changes in a curved manner as viewed in the longitudinal section, as shown in FIG.
It is preferable that the width W2 of the extended portion 15a in the region C corresponding to the region A in FIG.

By correcting the cross-sectional shape of the hole as shown in FIGS. 7 and 8, the target cross-sectional shape of the modified cross-section yarn is accurately realized.

The modification of the cross-sectional shape of the hole in the discharge hole portion is not limited to the modified cross-section shown in FIGS. 7 and 8, and can be applied to any modified cross-section.

For example, FIGS. 9 and 10 show a pentalobe (star).
2 shows an example of a deformed cross section of FIG. 9 shows the width W3 of the extending portion 16a of the cross-sectional shape 16 changed in a linear taper shape, and FIG. 10 shows the width W3 of the extending portion 17a of the cross-sectional shape 17.
4 is a curve tapered shape.

In the above embodiment, the spinning fluid flowing from the introduction hole 8 into the discharge hole 10 flows along the three-dimensional curved surface portion 9. The three-dimensional curved surface portion 9 is smoothly connected to the discharge hole portion 10 having a Y-shaped irregular cross section so that the shape line of the entrance 10a of the discharge hole portion 10 does not appear. The flow that reaches inside is also a very smooth streamline flow. That is, the flow does not form a broken line as in the conventional shape, and in particular, since the flat portion as shown in FIGS. 18 and 19 is not formed at all immediately above the discharge hole portion 10, there is a portion where there is a possibility of stagnation. The pressure loss is greatly reduced by the smooth and smooth flow.

In this embodiment, the boundary between the introduction portion 7 and the introduction hole 8 and the boundary between the introduction hole 8 and the three-dimensional curved surface 9 are also smoothly connected. These portions also have a smooth flow state, and the pressure loss is further reduced.

Further, since the ceramic member 5 having the spinning hole 4 can be manufactured easily, accurately and in large quantities separately from the metal disc member 2, the spinneret 1 can be manufactured in a short time. In addition, it can be manufactured at low cost.

Further, by changing the cross-sectional shape of the discharge hole portion 10 to change the width of the extending portion as shown in FIGS. 7 to 10, the flow rate change based on the pressure loss difference of the fluid can be corrected. The cross-sectional shape of the modified cross-section yarn discharged to the target can be more accurately formed into a target shape.

Next, a method of manufacturing the spinneret according to the present invention will be described. This method is intended to efficiently produce a spinneret for a modified cross-section yarn using a ceramic member, and can easily produce the above-described cross-sectional shape in which the width of the extending portion is changed. It is possible.

First, FIG. 11 shows a first method. In this method, first, a plate-like material is prepared, and three plate-like members 21a, 21b, and 21c as shown in the figure are formed. By combining these three plate-like members 21a, 21b, 21c as shown in the figure and joining the three members as necessary, a combination member 21 having a Y-shaped irregular cross section is formed.
Create The combination member 21 is provided with an extension line and an extension line on the one end surface of the cylindrical member 22 having one end surface formed into a spherical surface (in this embodiment, formed into a hemispherical surface). Are joined so that their axes coincide with each other.
Joining may be performed by any method, for example, brazing, electric discharge machining, or the like. Using the integrated member 23 as a molded male mold, the above-described ceramic material is disposed around the integrated member 23, and the above-described ceramic member is formed. The formed ceramic member is fired and hardened. The thus formed ceramic member is provided with a spinning hole having a deformed cross section substantially identical in shape to the integrated member 23, that is, a spinning hole having a desired deformed cross section. The molded ceramic member is fixed in the mounting hole of the base body as described above.

In the case where the combination member 21 or the integrated member 23 has a corner, the corner may be appropriately polished and rounded before forming the ceramic member. Further, it is possible to make the formed ceramic member round.

According to the first method, a spinning hole having a substantially arbitrary cross section can be formed. However, when changing the width of the extending portion in the above-mentioned irregular cross-sectional shape, the second method described below is easier to perform.

The second method is implemented, for example, as shown in FIGS. The example shown in the figure is a method for forming a Y-shaped irregular cross section. First, a cylindrical pin member 3 having a circular cross-section, having a large-diameter portion 31a and a small-diameter portion 31b, between which a tapered portion 31c smoothly connects.
1 is created. A small diameter portion 31b of the pin member 31;
Grinding means for at least a part of the tapered portion 31c;
For example, a groove 33 is formed by a grinding wheel 32 in a direction along the axis of the pin member 31. If the groove 33 is formed at three places in the circumferential direction, a desired Y-shaped irregular cross section can be obtained. The tapered portion 31c is formed so that the groove depth gradually decreases toward the large-diameter portion 31a.

In this embodiment, the grinding wheel 32 is 12
It has an edge angle of 0 ° and is formed in a regular trilobe-shaped irregular cross section as shown in FIG. In addition, it is preferable that the tip of the grindstone 32 be rounded and the bottom of the formed groove be rounded. If there is a corner at the tip of the formed regular trilobe, it may be rounded appropriately.

The grooved pin member 31 thus produced
Is formed as a molded male mold, the above-described ceramic material is disposed around the pin member 31, and the above-described ceramic member is formed. The ceramic member thus formed is
For example, it has a spinning hole shape 34 as shown in FIG. In FIG. 14, the groove shape in the hole is represented by a line for the sake of convenience, but in reality, these shape lines are not shown because the inner surface of the hole changes smoothly. 34a is a discharge hole, 3
Reference numeral 4b denotes a raised portion on the inner surface of the hole.

The ceramic member thus formed is
A desired spinneret is manufactured by being fixed in a mounting hole of a separately manufactured spinneret main body.

The second method is the most suitable method to be applied to the case where the width of the radially extending portion in the irregular cross section is changed.

For example, as shown in FIG. 15, by using a grinding wheel 41 having a cutting edge angle smaller than 120 ° and forming a groove 43 in a cylindrical pin member 42, a radial direction of a deformed cross section 44 is formed. The width of the extension portion 44a can be reduced toward the radially inner side and increased toward the radially outer side. If necessary, each part may be rounded and a ceramic member may be formed by the same method as described above. A discharge hole having a shape as shown in FIGS. 7 and 8 is easily formed in the ceramic member formed by such a method.

The spinning fluid in the present invention is not particularly limited as long as it can be spun.
The die according to the present invention is particularly suitable for use as a die for synthetic fibers represented by nylon or polyester, that is, a die for spinning a polymer at a relatively high pressure. Regenerated fibers typified by rayon and semi-synthetic fibers typified by acetate are often used with a thin base (for example, a simple one in which a plate of about 1 mm is punched with a punch). The present invention can be applied to such a fiber when a relatively thick base is used.

[0050]

As described above in detail, according to the method of manufacturing a spinneret according to the present invention, the ceramic member is formed by using the integrated member or the pin-shaped member as the forming male die. High-precision ceramic members having a uniform hole shape can be manufactured easily, in large quantities, and in a short time, so that a desired spinneret can be manufactured at low cost. In particular, a die having a discharge hole in which the width of the radially extending portion in the irregular cross-sectional shape changes can be easily and inexpensively manufactured.

In the spinneret manufactured by the method for manufacturing a spinneret according to the present invention, the width of the radially extending portion in the irregular cross section of the discharge hole portion of the spinning hole may be changed. Since the fluid can be discharged from the outlet of the discharge hole at a desired flow rate in each part, it is possible to accurately spin a yarn having a target irregular cross-sectional shape. Thereby, the inner surface of the spinning hole reaching the discharge hole inlet can be formed into a three-dimensional curved surface without any problem. And the pressure loss can be greatly reduced. As a result, the quality of the spun yarn can be improved, and as a result, it is possible to increase the pressure resistance of components upstream of the yarn including the die.

Further, if the member having the spinning hole is formed separately from the die body, and this member is formed of a ceramic member and is fixed to the die body, the desired hole as described above can be easily formed. In addition, a spinneret can be manufactured at a low processing cost with a short processing time. The effect of reducing the production cost is more remarkable as the number of holes for spinning increases, and a spinneret having a number of holes of several thousands can achieve a great cost reduction effect.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a spinneret manufactured by a manufacturing method of the present invention.

FIG. 2 is a partially sectional side view showing a spinneret of FIG. 1;

FIG. 3 is an enlarged partial longitudinal sectional view of the spinneret of FIG. 1;

FIG. 4 is an enlarged plan view of the spinning hole of FIG. 3;

FIG. 5 is an enlarged vertical sectional view of the vicinity of a discharge hole of the spinneret of FIG. 1;

FIG. 6 is a hole plan view showing an example of the shape of an irregular cross section of a discharge hole portion.

FIG. 7 is a hole plan view showing another example of the shape of a cross section of the discharge hole portion.

FIG. 8 is a hole plan view showing still another example of the shape of the cross section of the discharge hole portion.

FIG. 9 is a plan view of a hole showing an example of the shape of a further different transverse cross section of the discharge hole.

FIG. 10 is a hole plan view showing another example of the shape of a cross section of a discharge hole portion having a different shape.

FIG. 11 is a partial side view of an integrated member used in the method of manufacturing a spinneret according to the present invention.

FIG. 12 is a partial side view of a pin-shaped member used in the method of manufacturing a spinneret according to the present invention.

FIG. 13 is a front view of the member in FIG. 12 as viewed from the small-diameter portion side.

14 is a plan view of a spinning hole of a ceramic member formed from the member shown in FIG.

FIG. 15 is a front view of the pin-shaped member showing a modification of FIG. 13 as viewed from the small-diameter portion side.

FIG. 16 is a longitudinal sectional view of a spinning hole of a conventional spinneret.

FIG. 17 is an enlarged plan view of the spinning hole of FIG. 16;

FIG. 18 is a longitudinal sectional view of a spinning hole of another conventional spinneret.

FIG. 19 is an enlarged plan view of the spinning hole of FIG. 18;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Spinneret 2 Metal disk member as a spinneret main body 3 Mounting hole 4 Spinning hole 5 Ceramic member 6 Heat resistant inorganic adhesive 7 Introducing part 8 Introducing part 9 Three-dimensional curved surface part 10 Discharge hole part 10a Discharge hole part 13, 14, 15, 16, 17 Irregular transverse section 13a, 14a, 15a, 16a, 17a Radially extending portion 21 Combination member 21a, 21b, 21c Plate member 22 Column member 23 Integrated member 31, 42 yen Columnar pin-shaped member 31a Large diameter portion 31b Small diameter portion 31c Taper portion 32, 41 Grinding wheel 33, 43 Groove 34 Spinning hole 44a Radially extending portion

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-124619 (JP, A) JP-A-50-76312 (JP, A) JP-A-62-177206 (JP, A) JP-A-51-76 99107 (JP, A) JP-A-7-157910 (JP, A) JP-A-6-128805 (JP, A) JP-B-46-36247 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) D01D 4/00-4/02 D01D 5/253

Claims (3)

(57) [Claims] 1. A cross section obtained by combining a plurality of plate members.
Create a combination member whose shape is a non-circular irregular shape, and
A cylindrical member having one end surface formed into a spherical surface.
The extension of the axis of the cylindrical member and the
Joined so that their axes coincide, integrated with the cylindrical member,
The integrated member is a molded male mold and ceramic
For spinning with the same shape as the integrated member
Forming a ceramic member having holes;
Is fixed in the mounting hole formed in the base body.
A method for producing a spinneret. 2. A circular cross section having a large diameter portion and a small diameter portion.
Create a cylindrical pin member with a tapered connection between both parts
Then, using a grinding means, a small diameter portion of the pin member and a small
Extend in a direction along the axis of the pin member
A plurality of grooves are engraved in the circumferential direction of the pin member, and the pin member is
A male mold is formed and a ceramic material is arranged around the pin member.
Ceramic having a spinning hole having substantially the same shape as the pin member
Molding the ceramic member and forming the ceramic member on the base body
Characterized by being fixed in a set mounting hole, a spinning port.
Gold manufacturing method. 3. An R-shape is formed on a corner portion of the male mold.
3. The spinning of claim 1 or 2, wherein the spinning is rounded.
Manufacturing method of base.