JPS63201033A - Glass fiber producing device - Google Patents

Abstract

PURPOSE:To produce the glass fibers uniform in diameter by providing a subterminal on the outside of a glass heating main terminal when recesses are furnished at regular intervals to a bushing plate in the title glass fiber producing device and glass fibers are spun through a glass inlet hole on the inside of the recess. CONSTITUTION:Plural recesses 6 are provided to the bushing plate material 1 in the glass fiber producing device 5', a reinforcing rib 2 is formed between the respective recesses 6, and a frame 3 is integrally formed on the outside edges of the recesses 6. Many funneled glass inlet holes 7 are staggeringly bored in each recess 6, and the bushing plate 1 having nozzles which spinning holes is pierced, is formed at the bottom. Molten glass is filled in the device 5', main and auxiliary terminals 4, 8, and 8' are energized, and the molten glass is spun into a fiber through the nozzle hole. Since the frame 3 as well as the auxiliary rib 2 are heated by the auxiliary terminals 8 and 8', the molten glass is wholly and uniformly heated, and a glass fiber having uniform diameter can be spun through the nozzle.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in bushing plates for manufacturing glass fibers.

(Prior Art) Conventionally, in order to manufacture glass fibers, a bag for manufacturing glass fibers was used, in which a bushing plate 1 was provided with reinforcing ribs 2 and a frame 3, and only a main terminal 4 for electrical heating was provided, as shown in FIG. W15 was used.

(Problem to be Solved by the Invention) By the way, when molten glass is discharged and spun by heating with electricity through the main terminal 4, the electrical resistance of the reinforcing ribs 2 and the frame 3 is small and the temperature does not easily rise, so the temperature at the bushing surface increases. A gradient occurs, and the temperature of the molten glass becomes non-uniform.Those at high temperatures become thin glass fibers, while those at low temperatures become thick glass fibers, resulting in variations in thickness. There was a problem that glass fiber could not be obtained.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and is a bushing for manufacturing glass fibers that eliminates temperature gradients on the bushing surface and significantly reduces variations in the thickness of glass fibers to be spun. The purpose is to provide plates.

(Means for Solving the Problems) In order to solve the above-mentioned problems, a glass fiber manufacturing apparatus according to the present invention includes recesses provided at regular intervals in a bushing plate material and reinforcing ribs formed between the recesses. An integral frame is formed at the outer end of each recess, a number of glass introduction holes are arranged at regular intervals in each recess, and a spinning hole is formed through the bottom of each glass introduction hole to form a nozzle. A glass fiber manufacturing apparatus having a bushing plate comprising: a sub-terminal for auxiliary heating control, in addition to a main terminal for energization heating, is attached to the frame at the outer end of each of the recesses. be.

(Function) As described above, the glass fiber manufacturing apparatus of the present invention is equipped with a sub-terminal for auxiliary heating control in addition to the main terminal for electrical heating, so that molten glass is discharged by electrical heating of the main terminal. During spinning, electricity is applied from the subterminal to the frame at the outer end of each concave part, heating the frame and the reinforcing ribs between each concave part and raising the temperature. This suppresses the temperature gradient of the bushing plate and increases the temperature of the molten glass. is approximately average -, and the variation in thickness is extremely small (approximately average -
Glass fibers of a certain thickness can be obtained.

(Example) An example of the bushing plate for manufacturing glass fiber of the present invention will be described with reference to FIG.
A bushing plate material 1 made of Pt-Rhloht% alloy with a thickness of 21 m has a width of 70 mm at intervals of 4411.
Five recesses 6 each having a length of 40 mm and a depth of 2 mm are provided, reinforcing ribs 2 are formed between each recess 6, and an integral frame 3 with a width of 15+u is formed at the outer end of each recess 6. Inside each recess 6, 94 funnel-shaped glass introduction holes 7 with an opening diameter of 4.5 mm are bored in a staggered arrangement at 511 intervals, and at the bottom of each glass introduction hole 7 is a spinning hole with a diameter of 1.6 mm. A device 5 for producing glass fibers having a bushing plate 1 formed by forming a nozzle by forming a nozzle through the bushing plate 6.
', the thickness 61 and the width 30 provided at the center of the side end surface.
There are terminals 30 mm thick and 20 mm wide on both sides of the main terminal 4 for electrical heating with a length of 60 mm and a length of 60 mm.
fl, and one subterminal 8.8' for auxiliary heating control with a length of 60 m1 is installed.

A power cord is connected to the main terminal 4 for energization heating of the embodiment configured as described above, and the glass fiber manufacturing apparatus 5 is installed.
After heating the frame 3 and the reinforcing ribs 2 by heating the frame 3 and the reinforcing ribs 2 by heating the frame 3 and the reinforcing ribs 2 by connecting the auxiliary heating power cord to the subterminal 8. Compared to the conventional glass fiber manufacturing apparatus 5 which does not have a sub-terminal 8.8' for heating control, which is heated by electricity and spun by discharging molten glass from a nozzle, the thickness variation is extremely small and the thickness is almost uniform. A thick glass fiber was obtained. This is because the frame 3 and the reinforcing ribs 2 are heated through the auxiliary heating control terminal 8.8' during the discharge spinning of the molten glass, and the temperature rises. As a result, the temperature gradient of the bushing plate 1 is suppressed, and the temperature of the molten glass is approximately This is because it is even.

The thickness of the sub-terminal 8.8' for auxiliary heating control is 172 to 1 1/2 times the thickness of the main terminal 4 for electrical heating.
A value of 15 is preferable; if it exceeds 1/2, the temperature will rise too much and vibration control will not be possible, and if it is less than 175, heating will be insufficient.

Furthermore, although the bushing plate 1 in the above embodiment is square, it may also be circular, donut-shaped, or the like.

Further, the manner in which the terminal is attached is not limited to the embodiment, and may be attached as shown in FIG. 2.

(Effects of the Invention) As can be seen from the above explanation, the glass fiber manufacturing apparatus of the present invention is equipped with a sub-terminal for auxiliary heating control in addition to the main terminal for energization heating. During discharge spinning of molten glass, the sub-terminal for auxiliary heating control heats the frame at the outer end of each recess and the reinforcing ribs between each recess to raise the temperature, thereby suppressing the temperature gradient of the bushing plate. As a result, the temperature of the molten glass becomes approximately uniform, resulting in the excellent effect that glass fibers having approximately uniform thickness with very little variation in thickness can be obtained.

In addition, in the glass fiber manufacturing apparatus of the present invention, if a pipe is provided in the main terminal for electrical heating and water cooling is provided, the temperature gradient of the bushing plate can be further suppressed, and the temperature of the molten glass can be adjusted to an appropriate level. I would like to add that it is possible to ensure uniformity.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a glass fiber manufacturing apparatus according to the present invention, FIG. 2 is a perspective view showing another example of the present invention, and FIG. 3 is a perspective view of a conventional glass fiber manufacturing apparatus. Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. 1-Bushing plate material, 2-Reinforcement lip, 3-Frame, 4-Main terminal for electrical heating, 5'--Glass fiber manufacturing device of the present invention, 6--Concavity , 7-Glass introduction hole, 8.8'-=Subterminal for auxiliary heating control.

Claims (1)

[Claims] Recesses are provided at regular intervals in the bushing plate material, reinforcing ribs are formed between the recesses, an integral frame is formed at the outer end of each recess, and a large number of glass introduction holes are arranged at regular intervals within each recess. In a glass fiber manufacturing device having a bushing plate formed by drilling a spinning hole through the bottom of each glass introduction hole to form a nozzle, there is a main terminal for electrical heating in the center of the side end surface of the bushing plate. A glass fiber manufacturing device characterized in that a subterminal for auxiliary heating control is attached to the device.