JPH0454627B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an apparatus for manufacturing composite glass fiber.

(Prior art and its problems) Conventionally, in order to manufacture composite glass fiber,
As shown in Fig. 2, an inner glass reservoir tank 4, which has a nozzle hole 3 integrally formed in the center of the bottom wall, is concentrically installed in the upper part of an outer glass reservoir tank 2, which has a nozzle hole 1 integrally formed in the center of the bottom wall. It was manufactured using manufacturing equipment 5. That is, while the molten glass G for coating in the outer glass storage tank 2 is spun through the nozzle hole 1, the molten glass G' for the core material in the inner glass storage tank 4 is spun from the nozzle hole 3 through the molten glass G for coating in the nozzle hole 1. A composite glass fiber F was produced by blowing into the center of the glass and spinning the composite fiber together with the molten glass for coating through the nozzle hole 1.

By the way, in the manufacturing method of such a composite glass fiber, since the glass storage inner tank 4 is provided at the upper part of the glass storage outer tank 2, the molten glass G' for the core material in the glass storage inner tank 4 cannot be stirred. All I can do is
Striae and bubbles were generated in the molten glass G for coating in the outer glass storage tank 2, and a product of good quality could not be obtained. Furthermore, in the above manufacturing apparatus, the nozzle holes 1 of the outer glass storage tank 2 and the nozzle holes 3 of the inner glass storage tank 4 are aligned by combining the outer glass storage tank 2 and the inner glass storage tank 4. Accurate alignment is extremely difficult. Therefore, it was not possible to make the thickness of the coated glass uniform in the circumferential direction, and it was not possible to obtain a composite glass fiber with high dimensional accuracy. Furthermore, since composite spinning of molten glass is carried out in batches using only the molten glass charged into the outer glass storage tank 2 and the outer tank 4, the length of the composite glass fiber F is limited.

(Objective of the Invention) The present invention has been made to solve the above-mentioned problems, and by stirring the molten glass for the core material and the molten glass for the coating together, the generation of striae and bubbles can be eliminated, the quality is good, and the size is good. A composite glass fiber manufacturing device that can produce composite glass fibers with high precision, can continuously spin molten glass for core material and coating, and can produce composite glass fibers of any length. This is what we intend to provide.

(Structure of the Invention) The composite glass fiber manufacturing apparatus of the present invention includes:
A small-diameter glass spinning tank is integrally installed at the bottom of the main glass storage tank for storing molten glass for coating, a nozzle hole is bored in the center of the bottom, and a filter is installed at the upper end of the glass spinning tank, A stirring rod is provided in the center of the main glass storage tank, and a sub-glass storage tank for storing molten glass for the core material is provided adjacent to the main glass storage tank integrally with the main glass storage tank. A glass outflow pipe is passed through the lower end of the main glass storage tank horizontally and supported vertically on the filter, and is also passed through the center of the filter so that its tip faces the nozzle hole in the vertical direction and is integrated. A glass spinning tank is provided, and a stirring rod is provided in the center of the sub-glass storage tank.

(Embodiment) An embodiment of the composite glass fiber manufacturing apparatus of the present invention will be described with reference to FIG. Reference numeral 6 denotes a main glass storage tank for storing molten glass G for coating made of Pt, and a small diameter glass spinning tank 8 is integrally provided at the bottom of the tank with a hopper-shaped inclined wall 7 interposed therebetween. A nozzle hole 9 is bored in the center. A filter 10 made of Pt is supported by an inclined wall 7 and fitted horizontally to the upper end of the glass spinning tank 8, thereby dividing the main glass storage tank 6 and the glass spinning tank 8. A stirring rod 11 is provided at the center of the main glass storage tank 6. Adjacent to the main glass storage tank 6, a sub glass storage tank 12 made of Pt for storing molten glass for the core material is provided integrally with the main glass storage tank, and a glass made of Pt is attached to the outer periphery of the lower end of the sub glass storage tank 12. An outflow pipe 13 is provided,
This passes through the peripheral wall of the main glass storage tank 6 in the horizontal direction, is supported on the filter 10 in the vertical direction, and passes through the center of the filter 10 so that its tip faces the nozzle hole 9 in the vertical direction and is integrated. This is a glass spinning tank. A stirring rod 14 is provided at the center of the sub-glass storage tank 12. Sho 1
5 and 15' are pipes for supplying molten glass for coating and molten glass for core material to the main glass storage tank 6 and the auxiliary glass storage tank 12.

Next, a method for manufacturing a composite glass fiber using the manufacturing apparatus 16 having such a configuration will be described. The molten glass for coating G supplied to the main glass storage tank 6 through the pipe 15 is stirred by rotating the stirring rod 11, passes through the filter 10, and is introduced into the glass spinning tank 8. The molten glass G for coating is spun through the nozzle hole 9. On the other hand, the secondary glass storage tank 1 is passed through the pipe 15'.
After stirring the molten glass G' for core material supplied to 2 by rotating the stirring rod 14, the glass outflow pipe 13
The molten glass G for coating was blown into the center of the molten glass G for coating in the nozzle hole 9 through the nozzle hole 9 and spun together with the molten glass G for coating to obtain a composite glass fiber F'.

As described above, in the manufacturing apparatus of the present invention, the molten glass G for coating supplied to the main glass storage tank 6 and the molten glass G' for core material supplied to the auxiliary glass storage tank 12 are rotated by stirring rods 11 and 14, respectively. Since the stirring was performed, striae and bubbles were removed from the molten glass G for coating and the molten glass G' for core material, and the molten glass G for coating
is passed through the filter 10 and introduced into the glass spinning tank 8, and the molten glass G' for the core material is passed through the glass outflow pipe at the bottom end of the auxiliary glass storage tank, so that striae and bubbles are completely removed from each molten glass. . Therefore, the quality of the composite glass fiber F' spun from the nozzle hole 9 was good.

In addition, the main glass storage tank 6 and the sub glass storage tank 12
Molten glass G for coating and molten glass for core material respectively.
Since it was possible to stir even when G' was continuously supplied, each molten glass G and G' could be continuously and stably spun into composite fibers of any length.
F′ was obtained.

(Effects of the Invention) As can be seen from the above explanation, the composite glass fiber manufacturing apparatus of the present invention stirs the molten glass for coating and the molten glass for core material supplied to the main glass storage tank and the auxiliary glass storage tank. We cut striae and bubbles,
Moreover, since the molten glass for coating passes through a filter and the molten glass for core material passes through a glass outflow pipe, striae and bubbles are completely removed, and the composite glass fiber spun from the nozzle hole is of good quality. In addition, since the molten glass for coating and the molten glass for the core material can be stirred even when they are continuously supplied to the main glass storage tank and the auxiliary glass storage tank, each molten glass can be continuously and stably spun into composite fibers, and the length can be limited. It is possible to obtain a composite glass fiber of a required length that is not required.

Further, a secondary glass storage tank for storing molten glass for the core material is provided adjacent to the main glass storage tank for storing molten glass for coating, and a glass outflow pipe at the lower end of the secondary glass storage tank is passed through the main glass storage tank, The glass outflow pipe is supported on a filter stretched over the upper end of the small-diameter glass spinning tank at the bottom, and passes through the center of the filter, with its tip facing the nozzle hole at the bottom of the glass spinning tank. It can be easily positioned on the same axis as the nozzle hole and can be fixed with high precision, and furthermore, a stirring rod can be placed in the center of each glass reservoir. Therefore, the composite glass fiber spun from the nozzle hole can not only have high dimensional accuracy, but can also be spun efficiently and reliably.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of a composite glass fiber manufacturing apparatus of the present invention, and FIG. 2 is a diagram showing a conventional composite glass fiber manufacturing apparatus.

Claims (1)

[Claims] 1. A small-diameter glass spinning tank is integrally installed at the bottom of the main glass storage tank that stores molten glass for coating, a nozzle hole is bored in the center of the bottom, and a filter is installed at the top end of the glass spinning tank. A stirring rod is provided in the center of the main glass storage tank, and a sub-glass storage tank for storing molten glass for the core material is provided adjacent to the main glass storage tank integrally with the main glass storage tank. The glass outflow pipe at the lower end is passed horizontally through the lower end of the main glass storage tank and supported vertically on the filter, and is passed through the center of the filter so that its tip faces the nozzle hole in the vertical direction. A composite glass fiber manufacturing device comprising an integrated glass spinning tank and a stirring rod in the center of the sub-glass storage tank.