JPS60139821A - Apparatus for spinning carbon fiber - Google Patents

Abstract

PURPOSE:To keep the spinning surface of a spinneret at a uniform temperature, by using heating wires at a regular interval to many extrusion holes embedded at the upper and lower positions near the outlet starting tips in the horizontal direction. CONSTITUTION:An apparatus for spinning carbon fibers having heating wires 7 at a regular interval to many extrusion holes 6...6 of a spinneret 4 mounted to the lower end of a nozzle head having heating wires embedded in the side peripheral wall 3 thereof, the heating wires 7 being embedded at the upper and lower positions near the outlet starting tips 61...61 of the extrusion holes 6...6 in the horizontal direction. The heating wires 7 are connected to a temperature controller 11, and the spinning surface 42 of the spinneret 4 is heated by heating with the side peripheral wall 3 and the heating wires 7. Thus, a pressed in molten pitch is extruded from the spinning surface 42.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a carbon fiber spinning device which is novel and has great industrial applicability. - □ Originally, in equipment that spins pitch fiber from pitch, especially mepasoface pitch (petroleum-based, coal-based, etc.)・Melted pitch stock solution (2) is fed to screw feeder Q
41 to the nozzle head (1), and the nozzle head (1) is equipped with a spun and thread spool (4) to spin carbon fibers. Heating is carried out by heating the molten pitch stock solution to approximately 3.00℃ using a heating wire embedded in the nozzle head side peripheral wall (3).
Generally, the spinning surface of the spinneret, which is in direct contact with the outside air, is separated from the heated nozzle head side circumferential wall (3), in other words, the spinning surface is The temperature decreases as the temperature approaches the center of the exit surface, and the temperature decreases in the direction of spinning. It has been a concern in the carbon fiber spinning industry to eliminate this drawback, which increases the number of fibers and makes stable spinning impossible.

The device of the present invention aims to completely solve the above-mentioned problems in the field by very effectively maintaining a uniform temperature in the spinning direction of the spinneret.

Next, the configuration of the present invention will be specifically explained with reference to drawings showing embodiments.

(1) is a nozzle head that contains the molten pitch stock solution (2) to be press-fitted, and a heating wire (not shown) is embedded in the side peripheral wall (3), and the nozzle head (1) is filled with a heated wire (not shown). It shall be possible to adjustably heat the molten pitch (undiluted molten pitch).

(4) is a spinneret attached to the lower end of the nozzle head (1), (5)...Φ(5) is the spinneret (4
A plurality of spinning dope inlet holes, (6)...@kai, (6) open on the spinning dope receiving surface (5) of
)...Communicates with the reduced diameter end of (5), spinning surface (rolling)
The drawing shows that the spinning dope solution guide hole (5)...(5) has a straight tubular part with a large diameter and a tapered part in cross section that decreases in diameter downward. This shows an aspect in which the upper and lower sides are connected to each other.

(7) is one or more heating wires forming the essential part of the present invention, and the discharge holes (6) correspond to the arrangement of the discharge holes (6). 6), ... (6) are formed in a straight or curved shape spaced at equal intervals, and as shown in FIG. 4, the discharge hole starting end ( 2)...(2) Nearby, that is, the discharge hole (6
)...0.(6) Spinning stock solution introduction hole (5)...
- It shall be buried horizontally in the upper and lower positions near the part that receives the reduced diameter end of (5).

An example of the arrangement of the heating wire (7) is the discharge hole (
6)...When (6) is arranged in a circular or concentric pattern, as shown in Figure 2, the circular heating wires (7
), for example, two rows of concentrically arranged discharge holes (6) 0
(61) are buried at equal intervals between two rows, and the discharge holes (6
1...If (6) are arranged in parallel,
As shown in Fig. 3, an arbitrary number of linear heating wires (7) is
A large number of discharge holes (6) (61) are buried at equal intervals.

Although there is no limitation on the manner in which the heating wire (7) is buried, for example, as shown in FIG. After the heating wire (7) is placed in the heating wire burial groove (8), it may be covered with a holding plate (9). By the way, the 415i! IK^
The key to this is the presser foot and plate connector.

In the present invention, the above-mentioned heating wire (7) is connected to a temperature controller installed at an appropriate location to connect the nozzle head.
The spinning direction of the spinneret (4) is controlled by heating the side peripheral wall (3) and the heating wire (7) controlled by the temperature controller.
(2) 0...
A plurality of rings are arranged at appropriate locations during spinning Ifi.
This is a temperature sensor connected to the temperature controller ■.

In addition, a3 in FIG. 1 is a hopper, a rabbit is a screw feeder, and a9 is a carbon fiber.

In the device of the present invention, it is clear from the above configuration that
As such, it is possible to easily and reliably obtain the uniform heat retention effect for spinning, which is essential for stable fiber spinning in carbon fiber spinning equipment, and it is possible to achieve this effect with conventional spinning equipment of this type. It can completely prevent the occurrence of thread breakage in areas that could not be avoided.
Coupled with the fact that it can be manufactured at a relatively low cost due to its structure, it has great industrial applicability.

*Example 1 Outer diameter 801m/I1. 0.2 m in circular arrangement.
A concentric heating wire embedding groove was cut inward of the circular arrangement of the spinneret having 10 discharge holes of 1/m.

A cartridge heater connected to the temperature controller is embedded in the heating wire embedding groove, and in combination with heating the peripheral wall on the nozzle head side to which the spinneret is attached, the ejection surface is heated to approximately 300 mm.
Heat evenly to ℃ to melt petroleum-based □ Schiff Ace pitch! When the liquid was spun, fiber spinning was carried out smoothly in all holes from the initial yarn stand, and no yarn breakage was observed.

Example 2 Concentric heating wire embedding grooves were carved between the i-shaped arrays of a spinneret having 100 discharge holes of 0.2 ml and 1 ml, each having an outer diameter of 150 ml and two concentric circular arrays. A cartridge heater connected to a temperature controller is buried in the heating wire embedding groove, and in combination with heating on the circumferential side of the nozzle head that connects the spinneret, the discharge surface is heated to approximately 300°C.
When the temperature was measured using six temperature sensors disposed on the discharge surface, the temperature was 300 fc±6''.

Using this device, when the same molten stock solution of petroleum-based mesoface pitch as in Example 1 was spun, smooth fiber spinning was observed from all holes after wiping six times, and there was no yarn breakage phenomenon.

[Brief explanation of the drawing]

Figure 1 is a general explanatory diagram of a carbon fiber spinning device, Figures 2-
Fig. 4 shows an embodiment of the device of the present invention, in which Fig. 2 is a plan view showing one embodiment, Fig. 3 is a plan view showing another embodiment, and Fig. 4 is a main part. FIG. In the drawing, (1) is the nozzle head, (2) is the molten pitch stock solution, and (3) is the nozzle head side circumference i! , (41 is the spinneret, (Foundation) is the spinning dope receiving surface, (Tan) is the spinning surface, (5)
...(5) is the spinning solution introduction hole, (6) ...(6
) is the discharge hole, (69 is the starting end of the discharge hole, (7) is the heating wire,
(8) is the heating wire embedding groove, (9) is the holding plate, (2) is the holding plate connector, (2) is the temperature controller, and the surface is the temperature sensor, (
(to) is the hopper, I is the screw feeder, and (to) is the carbon fiber. Patent Applicant Masaru Aoki Representative Patent Attorney Takashi Ito Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. The nozzle head of the side peripheral wall heating which contains the molten pitch concentrate to be press-fitted has a number of poles □ of discharge holes communicating with the contracted diameter end of the spinning □ yarn concentrate introducing hole □. Place □ in a carbon fiber spinning device equipped with a spinning face number and a spinneret for opening.
)... Corresponding to the arrangement mode (6), the discharge holes (
6)...-' The wires formed in straight or curved shapes spaced at equal intervals according to (6) are attached to the spinneret (starting end of the discharge hole in the total thickness of 41゛ -1... The equipment is installed horizontally in the upper and lower positions near 611, and the -heat □ wire (7
) and the temperature, which is placed in the right place, is 7.7゛ female 2. He is configured to uniformly heat the spinning spinneret' (4) by heating the side peripheral wall (3) and heating the heating wire (7) connected to the temperature controller (6). - A fiber spinning device characterized by: 2. The heating wire (7) corresponds to the discharge hole [6]...+61, which is arranged in a circular or concentric circular shape.
``Carbon fiber spinning device according to claim 1'' having a circular shape. 3. - The hot wires (7) are arranged in a dog-like arrangement number (6).
... (Claim 1 MMa carbon ゛i anti-spinning equipment-0゛□ which has a straight □ shape that does not correspond to 61)