JPH04370209A - Production of spinneret for spinning of modified fiber - Google Patents

Abstract

PURPOSE:To form a plurality of spinning dope-extruding holes in the bottom of a spinning dope-feeding hole at a highly precise distance by forming the spinning dope-extruding holes in the center of the bottom of a spinning dope- feeding hole with a punch having a flat tip, the spinning dope-feeding hole being formed in a thin dish-shaped spinneret plate. CONSTITUTION:A plurality of holes 16 for spinning a spinning dope are formed with a punch 15 having a flat tip in the center of the bottom of a spinning dope-feeding hole 4 formed in a thin dish-shaped spinneret plate 2. Depositions formed on the outside surface of the dish-shaped spinneret plate are ground and removed for the penetration of the spinning dope-extruding holes for finishing the formation of the spinning dope-extruding holes. The material is cut with the tip angle part of the punch to form the penetrated spinning liquid- extruding holes without causing the positions of the spinning dope-extruding holes to deviate.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for manufacturing a spinneret for spinning irregularly shaped yarn having a peanut-shaped cross section.

0002

2. Description of the Related Art Conventionally, in order to manufacture a spinneret for spinning irregularly shaped yarn 1 having a peanut-shaped cross section as shown in FIG.
As shown in the figure, a large number of undiluted solution introduction holes 4 with a flat bottom are formed in an array on a thin dish-shaped cap plate 2 using a flat punch 3, and then the undiluted solution introduction holes 4 are formed on the outer surface of the dish-shaped cap plate 2 by drilling the undiluted solution introduction holes 4. warts 5
is removed by polishing as shown in FIG.
Two small-diameter stock solution discharge holes 7 are preformed, and then warts 8 formed on the outer surface of the dish-shaped cap plate 2 due to the preforming of the stock solution discharge holes 7 are removed by polishing as shown in FIG. death,
Next, as shown in FIG. 10, the preformed stock solution discharge hole 7 is formed into a stock solution discharge hole 10 using a sharp second punch 9, and then the stock solution discharge hole 10 is formed on the outer surface of the dish-shaped cap plate 2. The formed wart 11 is removed by polishing as shown in FIG. 11, and then, as shown in FIG. 12, the stock solution discharge hole 10 is penetrated by machining of the reamer 12 to form the stock solution discharge hole 13, and then the stock solution is removed. Figure 13 shows the burr 14 on the opening edge of the discharge hole 13.
It was removed as shown.

By the way, in the method for manufacturing the irregularly shaped yarn spinneret, the material is elongated by the processing of the first punch 6, the second punch 9, and the reamer 12, and the two stock solutions at the bottom of the stock solution introduction hole 4 shown in FIG. Distance A dimension of discharge holes 13 is standard ±0.02m
Since there is a large variation of ±0.04 mm with respect to m, the yarn discharged and spun from the two stock solution discharge holes 13 may not adhere, or even if it does adhere, the cross section will be oval, resulting in a cross section with the required dimensions and shape. It was not possible to obtain a donut-shaped irregularly shaped thread. In addition, the elongation of the material caused the tool to break and form oblique holes.

0004

[Problems to be Solved by the Invention] Therefore, the present invention improves the accuracy of the interval between the two stock solution discharge holes at the bottom of the stock solution introduction hole, and spins irregularly shaped yarn with a peanut-shaped cross section of required dimensions and shape. It is an object of the present invention to provide a method for manufacturing a spinneret that can be used.

[0005]

[Means for Solving the Problems] A method for manufacturing a spinneret for irregularly shaped yarn according to the present invention to solve the above-mentioned problems is a method for manufacturing a spinneret for spinning irregularly shaped yarn having a peanut-shaped cross section, the method comprising:
A large number of large-diameter, flat-bottomed solution introduction holes are punched in a thin dish-shaped cap plate using a flat punch, and then the warts formed on the outer surface of the dish-shaped cap plate are removed by polishing. Then, in the center of the bottom of each stock solution introduction hole, use a punch with a flat tip to punch a plurality of small diameter stock solution discharge holes at a predetermined interval, and then, by drilling the stock solution discharge holes. This method is characterized in that warts formed on the outer surface of the saucer-shaped cap plate are removed by polishing to penetrate the stock solution discharge hole, and then the stock solution discharge hole is finished and formed.

[0006]

[Function] As described above, in the method for manufacturing the irregularly shaped yarn spinneret of the present invention, a plurality of stock solution discharge holes are bored in the center of the bottom of the stock solution introduction hole using a punch with a flat tip. Therefore, the material is cut at the tip corner of the punch to obtain a stock solution discharge hole. Therefore, since the material does not extend in the lateral direction, the position of the stock solution discharge hole does not shift, and the interval between the plurality of stock solution discharge holes at the bottom of the stock solution introduction hole becomes highly accurate.

[0007]

[Example] An example of the method for manufacturing the irregularly shaped yarn spinneret of the present invention will be explained with reference to the drawings.As shown in FIG.
．． Disc-shaped cap plate 2 made of 60% Pt-Au with a diameter of 4 mm, an inner diameter of 50 mm, a depth of 9.6 mm, and a flange outer diameter of 60 mm.
Then, as shown in Figure 2, use a flat punch 3 to cut the inner diameter with a flat bottom.
A large number of stock solution introduction holes 4 with a diameter of 0.5 mm and a depth of 0.3 mm are formed in an array, and then the dish-shaped cap plate 2 is formed by drilling the stock solution introduction holes 4.
The warts 5 formed on the outer surface of the tube were removed by polishing as shown in FIG.
2 pieces with 1mm interval, inner diameter 0.05mm, depth 0
．． Drill a 1 mm stock solution discharge hole 16, then drill the stock solution discharge hole 1.
Wart 1 formed on the outer surface of dish-shaped cap plate 2 by drilling 6
7 is removed by polishing as shown in FIG.
6, and then finished forming the stock solution discharge hole 16.
A shaped yarn spinneret was obtained.

[0008] Regarding the 100 irregularly shaped yarn spinnerets thus obtained, the distance between the two stock solution discharge holes 16 at the bottom of the stock solution introduction hole 4 was measured, and all were within ±0.02 mm of the standard, showing extremely high accuracy.

[0009]

[Effects of the Invention] As can be seen from the above explanation, according to the manufacturing method of the irregularly shaped yarn spinneret of the present invention, the positional accuracy of the two stock solution discharge holes at the bottom of the stock solution introduction hole is improved, and the required size and shape are improved. An irregularly shaped yarn spinneret capable of spinning irregularly shaped yarn having a peanut-shaped cross section is obtained. In addition, according to the method for manufacturing the irregularly shaped yarn spinneret of the present invention, the stock solution introduction hole and the stock solution discharge hole are obtained by processing with a flat punch and a punch with a flat tip, so the cost of the irregularly shaped yarn spinneret is reduced. .

[Brief explanation of drawings]

FIG. 1 is a diagram showing the steps of an embodiment of the method for manufacturing a irregularly shaped yarn spinneret of the present invention.

FIG. 2 is a diagram showing the steps of an embodiment of the method for manufacturing a irregularly shaped yarn spinneret of the present invention.

FIG. 3 is a diagram showing the steps of an embodiment of the method for manufacturing a irregularly shaped yarn spinneret of the present invention.

FIG. 4 is a diagram showing steps of an embodiment of the method for manufacturing a irregularly shaped yarn spinneret of the present invention.

FIG. 5 is a diagram showing the steps of an embodiment of the method for manufacturing a irregularly shaped yarn spinneret of the present invention.

FIG. 6 is a diagram showing a deformed yarn with a peanut-shaped cross section.

FIG. 7 is a diagram illustrating the steps of a conventional method for manufacturing a irregularly shaped yarn spinneret.

FIG. 8 is a diagram illustrating the steps of a conventional method for manufacturing a irregularly shaped yarn spinneret.

FIG. 9 is a diagram illustrating the steps of a conventional method for manufacturing a irregularly shaped yarn spinneret.

FIG. 10 is a diagram illustrating the steps of a conventional method for manufacturing a irregularly shaped yarn spinneret.

FIG. 11 is a diagram illustrating the steps of a conventional method for manufacturing a irregularly shaped yarn spinneret.

FIG. 12 is a diagram illustrating the steps of a conventional method for manufacturing a irregularly shaped yarn spinneret.

FIG. 13 is a diagram illustrating the steps of a conventional method for manufacturing a irregularly shaped yarn spinneret.

FIG. 14 is a diagram illustrating defects caused by the conventional manufacturing method of a irregularly shaped yarn spinneret.

[Explanation of symbols]

2　Dish-shaped cap plate 3 Flat punch 4 Stock solution introduction hole 5 Warts 15　Punch with a flat tip 16 Stock solution discharge hole 17 Warts

Claims (1)

[Claims] Claim 1: In manufacturing a spinneret for spinning irregularly shaped yarn having a peanut-shaped cross section, a large number of large-diameter, flat-bottomed solution inlet holes are punched in a thin dish-shaped spinneret plate in an array, Next, the warts formed on the outer surface of the saucer-shaped cap plate by drilling the stock solution introduction holes were removed by polishing, and then a punch with a flat tip was punched at the center of the bottom of each stock solution introduction hole at a predetermined interval. Then, the warts formed on the outer surface of the dish-shaped cap plate by drilling the stock solution discharge holes are polished and removed, and the stock solution discharge holes are penetrated. 1. A method for manufacturing a irregularly shaped yarn spinneret, which comprises finishing a discharge hole.