JPH042805A - Method for forming protruded nozzle of spinneret - Google Patents

Abstract

PURPOSE:To obtain a spinneret having high protruded nozzle height and enabling stable spinning by machining with plural punch tools having gradually sharpening point angles, applying a specific treatment and reaming the product. CONSTITUTION:A protruded nozzle 6 is formed on a spinneret by machining a spinning face plate 1 with plural punch tools (fools) having gradually sharpening point angles, working with a tool having an intermediate point angle to bulge the protrusion 2 on the spinning face plate 1 and reaming and finishing the product. Concretely, the face plate is successively machined with a tool having a point angle of 36 deg., a tool having a point angle of 32 deg. and a tool having a point angle of 20 deg., pushed out with a tool having a point angle of 35 deg. corresponding to the intermediate angle in the above tools and reamed.

Description

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

(Prior art and its problems) Conventionally, in order to form tens of thousands of minute protruding nozzles especially in a thin plate spinneret, a punch tool is attached to the spinning face plate 1' of the spinneret as shown in Fig. 2a. Then, as shown in Fig. 2, the concave part 2' of the introduction hole is formed, and then the protruding part 3' is removed by polishing, as shown in Fig. 2 C and d. Processing is carried out sequentially using a punch with an acute angle tip and a punch tool with an even more acute angle, and then the hole is penetrated with a reamer as shown in Fig. 1e, and the inner diameter of the spinning hole 4' and the tip of the protrusion 5' are After finishing the process, use the protruding nozzle 6'.
It was.

However, in the above method, the protrusion height is limited to a low level especially in thin plates due to the introduction hole diameter and spinning hole.
Therefore, during spinning, molten polymer adheres to the periphery of the spinning hole,
As the threads gradually accumulated, breakage began to occur.

(Object of the Invention) Therefore, the present invention provides a method for forming a protrusion nozzle with a high protrusion height in a thin plate spinneret.

(Structure of the Invention) The technical means of the present invention to solve the above problems is to form a protruding nozzle of a thin plate by sequentially processing with a plurality of punch tools whose tips are gradually sharpened, and then reaming and finishing. In this method, processing is performed using a punch tool having a tip angle intermediate between the punch tools before the reaming process.

(Function) According to the method for forming the protruding nozzle in the spinneret of the present invention configured as described above, the tip of the protruding nozzle is formed at the intermediate tip between the punch tools that are sequentially processed using the punch tools with gradually sharp angles before the reaming process. Since processing is performed using a punch tool with an angle, the protrusion on the inner periphery created during the punching process is extruded, and as a result, the protrusion on the spinneret plate further expands, making it difficult to ream and finish. After processing, a protrusion nozzle with a high protrusion height will be obtained.

(Example) Examples and conventional examples will be described below.

First, as an example, as shown in Fig. 1a, the material is 5US31.
6. Plate thickness 1. A recess 2 with an introduction hole diameter of 0.65 mm is formed in the spinning face plate 1 of an Omm spinneret using a punch tool with a tip angle of 36 degrees.
At the same time, the bulge 3 formed on the opposite side was polished as shown in Figure 1. Next, as shown in Figure 1C and d, the tip of the punch tool was sharper than that in Figure 1A. Tip angle 3
2 degree punch tool and even sharper tip angle 20
After that, as shown in Fig. 1e, after processing with a punch tool with a tip angle of 35 degrees between the punch tools, as shown in Fig. 1f, the inner diameter is machined with a reamer. A spinning hole 4 of 0.15 mm was penetrated, and the protrusion tip 5 was finished to obtain a protrusion nostle 6 with a protrusion height of O and 15 mm.

On the other hand, as a conventional example, in the above embodiment, punching and finishing were performed in the same manner as in the embodiment except that the punch tool with a tip angle of 35 degrees was not used as shown in Fig. 1e, and the inner diameter was 0.15 mm. Protrusion height 0.1 with spinning holes
A protrusion nozzle with a diameter of 0 mm was obtained.

As is clear from the above results, in the conventional example, 0.
While the protrusion height was 10 mm, in the example, a protrusion nozzle with a height of 0.15 mm, which is 1.5 times higher than that of the conventional example, was obtained.

(Effects of the Invention) As described above, according to the method for forming a protrusion nozzle in a spinneret of the present invention, the protrusion nozzle has a high protrusion height, so stable spinning can be achieved without adhesion and accumulation of molten polymer. This has the excellent effect of providing a spinneret that can be used.

[Brief explanation of the drawing]

1A to 1F are diagrams showing the manufacturing process of an embodiment of the present invention, and FIGS. 2A to 2E are diagrams showing the manufacturing process of a conventional protrusion nozzle. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. Figure 1 (a) (d) (b) (e) (C) (f) Figure (a) (d) (b) (e) (C)

Claims (1)

[Claims] 1) When forming a protruding nozzle of a thin plate by sequentially processing with a plurality of punch tools whose tips are gradually sharpened, and then reaming and finishing, the intermediate tip between the punch tools is used before reaming. A method for forming a protruding nozzle in a spinneret characterized by processing using an angled punch tool.