JPH0930815A - Device for pouring out melted glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for pouring out a melted glass, capable of dividedly pouring out a necessary amount of the melted glass, eliminating the interference of heat between the upper and lower parts of the device, and changing the amount of the melted glass poured out from a melting crucible. SOLUTION: A flow port 4 for flowing out melted glass 3 is disposed in a melting crucible 1, and a movable flow-stopping valve 5 for opening or closing the flow port 4 is also disposed in the melting crucible 1. A reservoir 8 for the melted glass 3 is disposed at the lower end of the flow port 4, and a pouring nozzle 11 for pouring out melted glass 9 in the reservoir 8 is disposed on the reservoir 8. A gas nozzle 6 is disposed on the side surface of the flow port 4. The flow port 4 is closed with the flow-stopping valve 5, and a gas is subsequently charged into the flow port 4 through the gas nozzle 6 with a pressure flow control device to divide the melted glass 3 and simultaneously pour out a desired amount of the melted glass 9 from the pouring nozzle 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten glass pouring device that takes out necessary molten glass while heating and melting the glass to keep it warm.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Laid-Open No. 63-190722 and Japanese Patent Laid-Open No. 4-192722 disclose a pouring device for taking out molten glass.
It is disclosed in Japanese Patent Publication No. 193721. JP-A-63-
The molten glass pouring device described in Japanese Patent No. 190722, by changing the diameter of the pouring portion 23 from the melting crucible 21 to the pouring nozzle 22 to a large diameter as shown in FIG.
It was to increase the heat capacity of the molten glass 3 during pouring and reduce the heat interference between the upper and lower parts.

Further, the molten glass pouring device described in Japanese Patent Laid-Open No. 4-193721, as shown in FIG.
A gas ejection nozzle 34 and a suction nozzle 35 are connected in the middle of a pouring portion 33 communicating with a pouring nozzle 32 set at a lower portion of the melting crucible 31.
It was that the molten glass 3 inside 3 could be divided in a non-contact manner.

[0004]

However, JP-A-63-
In the molten glass pouring device disclosed in Japanese Patent No. 190722, as shown in FIG. 4, the pouring portion 23 between the melting crucible 21 and the pouring nozzle 22 does not have a function of dividing the molten glass 3. Since they flow continuously and continuously, it is difficult to carve out a necessary amount of glass and pour it out from the pouring nozzle 22. Further, since the molten glass 3 flows continuously, the interference of heat between the upper and lower sides cannot be eliminated, and the independent temperature control of the pouring portion 23 cannot be performed sufficiently.

In the molten glass pouring apparatus disclosed in Japanese Patent Laid-Open No. 4-193721, as shown in FIG.
Pouring section 3 between the melting crucible 31 and the pouring nozzle 32
3, there is no hot water reservoir for accumulating the molten glass 3,
The amount of molten glass 3 stored in the pouring nozzle 32 could not always be poured out, and the amount could not be changed.

The present invention has been made in view of the above-mentioned problems of the prior art, and makes it possible to cut and pour a required amount of glass and to pour out without interfering heat between the upper and lower parts. An object of the present invention is to provide a molten glass pouring device capable of independently controlling the temperature of each part and changing the amount of molten glass poured from a melting crucible.

[0007]

In order to solve the above-mentioned problems, the present invention has the following constitution. In the invention of claim 1, an outflow portion for outflowing the molten glass in the melting crucible is provided on the bottom surface of the melting crucible, a movable stop valve for opening and closing the outflow portion is provided in the melting crucible, and A molten glass pool is provided at the lower end of the outflow part, and a pouring nozzle for pouring out the molten glass in the pool is provided at the bottom of this pool, and a gas for injecting gas into the outflow part. A nozzle was provided, and a pressure flow rate adjusting device for sending gas to this gas nozzle was provided.

According to the invention of claim 2, in the structure of claim 1, the gas nozzle is provided on the side surface of the outflow portion. Further, the invention of claim 3 is the structure of claim 1, wherein the gas nozzle is provided so as to penetrate the stop valve.

According to the structure of claim 1, the molten glass heated and melted in the melting crucible passes through the outflow portion by a necessary amount by the opening / closing operation of the stop valve and accumulates in the hot water pool portion having a large volume. To be done. The molten glass in the melting crucible whose outflow was stopped by the stop valve is completely separated from the molten glass in the melting crucible and the molten glass in the basin by the gas injected from the gas nozzle into the outflow portion. ,
The molten glass in the molten metal pool becomes discontinuous with the molten glass in the upper melting crucible and is not subject to thermal interference. The temperature of the molten glass accumulated in the hot water reservoir is adjusted independently, and the viscosity is adjusted to the viscosity required for pouring. Next, the molten glass whose temperature has been adjusted in the hot water reservoir is pushed out from the temperature adjusted pouring nozzle by the gas injected from the gas nozzle into the outflow portion.

According to the second aspect of the present invention, after the outflow portion is closed by the stop valve, the gas is injected from the gas nozzle provided on the side surface of the outflow portion so as to traverse the molten glass in the outflow portion and melted. The molten glass in the crucible and the molten glass in the basin are completely divided, the molten glass in the basin is discontinuous with the molten glass in the upper melting crucible, and thermal interference is prevented.

According to the third aspect of the present invention, after closing the outflow portion with the stop valve, the molten glass in the outflow portion is sent toward the pouring portion from the gas nozzle provided through the stop valve. A gas is injected into the molten metal to make the molten glass in the molten metal reservoir discontinuous with the molten glass in the melting crucible in the upper portion, and to prevent thermal interference.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 of the present invention will be described below with reference to FIG. 1 is a sectional view showing a molten glass pouring device according to a first embodiment of the present invention. The melting crucible 1 is provided with a crucible heater 2 for heating and melting the glass, and an outflow portion 4 for outflowing the molten glass 3 inside is provided at the bottom thereof. Inside the melting crucible 1, a stop valve 5 having a rounded tip (lower end) for opening and closing the outflow portion 4 is provided so that it can be moved up and down (opened and closed) by a vertical movement control device (not shown). The outflow amount of the glass 3 can be adjusted.

A gas nozzle 6 is connected to the side surface of the outflow portion 4, and a gas of appropriate amount and pressure can be injected into the other end of the gas nozzle 6 by a pressure flow rate adjusting device (not shown). The gas to be injected is preferably a non-oxidizing gas (N ₂ gas or the like). Further, the outflow portion 4 is provided with a dedicated outflow portion heater 7 capable of independently controlling the temperature.
By this, the flow state of the glass inside the outflow portion 4 can be optimized.

At the lower end of the outflow section 4, a hot water pool section 8 having a larger volume than that of the outflow section 4 is connected so that a required amount of molten glass (storage glass) 9 can be pooled. The hot water pool portion 8 is provided with a dedicated hot water pool heater 10, and the hot water pool heater 10 can independently control the temperature of the storage glass 9 inside the hot water pool portion 8.

A pouring nozzle 11 for pouring the storage glass 9 to the outside is connected to the lower portion of the hot water pool portion 8 with its pouring outlet facing downward, and the pouring nozzle 11 is a dedicated nozzle heater. 12 allows independent temperature control.
The outflow part 4, the hot water reservoir part 8, and the pouring nozzle 11 are connected to the pouring part 1
In particular, the temperature control independent of the melting crucible 1 is made possible by the outflow part heater 2, the hot water pool heater 11, and the nozzle heater 12 for independent temperature control.

Next, the operation of the first embodiment of the present invention will be described. Heat and melt with crucible heater 2 (preferably 1000)
The molten glass 3 in the melting crucible 1 that has been heated to
The required amount passes through the outflow portion 4 whose temperature is controlled by the lower outflow portion heater 7 by the vertical movement (opening / closing) of the stop valve 5, and accumulates in the hot water pool portion 8 as storage glass 9. At this time, the outflow portion 4
Is adjusted to a temperature at which the molten glass 3 can flow quickly (preferably 1200 to 1400 ° C.), and the temperature of the hot water sump portion 8 is a temperature at which the storage glass 9 is easily poured out by the hot water sump heater 10 (preferably 1,000 to The temperature is adjusted to 1200 ° C.

When the flow stop valve 5 descends, the outflow portion 4 is closed to stop the outflow of the molten glass 3, and a required amount of the accumulated glass 9 accumulated in the hot water storage portion 8 is provided in the outflow portion 4.
The molten glass 3 in the upper melting crucible 1 is completely separated by the gas injected from the above. As a result, the accumulated glass 9 becomes discontinuous with the molten glass 3 in the upper melting crucible 1, and it is possible to prevent thermal interference from the molten glass 3.

The temperature of the storage glass 9 accumulated in the hot water reservoir 8 is controlled independently by the hot water heater 10 to the above temperature, and then the temperature at which the storage glass 9 is easily flowed out of the pouring nozzle 11 (preferably 1200). The temperature is controlled to 1400 ° C.) by the nozzle heater 12, and the temperature controlled storage glass 9 is extruded and ejected from the ejection nozzle 11 by the gas injected from the gas nozzle 6 in an appropriate amount.

According to the first embodiment of the present invention, the molten glass 3 is once accumulated in the hot water reservoir 8 to form the accumulated glass 9, and then the gas is injected from the gas nozzle 6 into the outflow portion 4 to melt the molten glass. After dividing 3 and the storage glass 9,
Since the accumulated glass 9 can be poured out from the pouring nozzle 11, it is possible to carve and pour out a required amount of glass, and it is possible to change the amount of molten glass poured out from the melting crucible 1. it can. Further, since the glass flow can be divided by the gas, the heat interference between the upper and lower sides of the molten glass 3 in the melting crucible 1 and the accumulated glass 9 in the basin 8 is eliminated, and the independent temperature control of the pouring part 4 is achieved. It becomes possible, and the temperature of the storage glass 9 can be individually adjusted to a viscosity suitable for pouring.

The second embodiment of the present invention will be described below with reference to FIG. 2 is a sectional view showing a molten glass pouring device according to a second embodiment of the present invention. The basic configuration of the second embodiment of the present invention is the same as that of the first embodiment of the present invention.
Therefore, only the parts different from the first embodiment will be described, and the same components will be denoted by the same reference numerals and the description thereof will be omitted.

In the first embodiment, the outflow portion 4 provided on the bottom surface of the melting crucible 1 was connected to the gas nozzle 6 and the pressure flow rate adjusting device (not shown) via the gas nozzle 6, but the present invention is embodied. In the second embodiment, the stop valve 1
A gas nozzle 15 is provided at the center of the nozzle 4, and gas from a pressure flow rate adjusting device (not shown) is injected into the outflow portion 4 from the round tip of the stop valve 14 in the outflow direction of the molten glass 3.

Next, the operation of the second embodiment of the present invention will be described. As for the molten glass 3 in the melting crucible 1 that has been heated and softened by the crucible heater 2, a required amount of the molten glass 3 is stored in the molten metal pool portion 8 by opening / closing (up / down) operation of the stop valve 14 by a vertical movement control device (not shown). Be done.

Next, the flow stop valve 14 is lowered to close the outflow portion 4 to stop the outflow of the molten glass 3 in the melting crucible 1, and then the gas nozzle 15 set in the flow stop valve 14 is shown in the drawing. A storage glass 9 in which an appropriate amount of gas is injected by a pressure flow rate adjusting device, and an appropriate amount is stored in the hot water reservoir 8.
And the molten glass 3 in the melting crucible 1 are completely separated.
The storage glass 9 separated by an appropriate amount by this division is completely independent of the upper molten glass 3 and is not discontinuously and thermally interfered with, and the viscosity control is performed by the temperature control of the hot water pool portion 8 by the hot water pool heater 10. Is possible.

Then, from the gas nozzle 15 to the accumulation glass 9
The pouring nozzle 1 in which a gas adjusted to an appropriate pressure and flow rate for pouring is injected and the temperature is controlled by the nozzle heater 12.
The storage glass 9 is poured out from the outside. Other functions are similar to those of the first embodiment of the present invention.

According to the second embodiment of the present invention, in addition to the effects of the first embodiment of the present invention, the gas nozzle 6 is set on the side surface of the outflow portion 4 in the pouring device of the first embodiment. On the other hand, in the second embodiment of the present invention, the gas nozzle 15
Is set inside the stop valve 14, and gas is injected into the outflow portion 4 from the tip of the stop valve 14, so that there is no bias at the time of glass cutting, and less glass remains at the end of the stop valve 14. Weighing accuracy is improved. Furthermore, since the airflow during glass pouring can be stably performed from directly above, the storage glass 9 can be smoothly poured from the pouring nozzle 11.

The third embodiment of the present invention will be described below with reference to FIG. 3 is a sectional view showing a molten glass pouring device according to a third embodiment of the present invention. The basic configuration of the third embodiment of the present invention is the same as that of the first embodiment. Therefore, only the parts different from the first embodiment will be described, and the same components will be denoted by the same reference numerals and the description thereof will be omitted.

In the configuration of the first embodiment, the outflow portion 4
With regard to the basin section 8, the lower end tip of the outflow section 4 is located on the upper surface of the inner wall of the basin section 8 and the connection state is continuous. However, in the third embodiment of the present invention, the lower end of the outflow section 16 is The outflow portion 16 and the molten metal reservoir 8 are connected so that the tip thereof projects downward from the upper surface of the inner wall of the molten metal reservoir 8.

Next, the operation of the third embodiment of the present invention will be described. In the melting crucible 1, an appropriate amount of the molten glass 3 heated and softened by the crucible heater 2 flows out to the pool 8 through the outflow portion 16 by the stop valve 5 which is driven to open and close by the vertical movement control device (not shown). Since the lower end tip of the outflow portion 16 is projected downward from the upper surface of the inner wall of the hot water sump portion 8, the molten glass 3 flowing out from the melting crucible 1 to the outflow portion 16 does not travel along the inner wall surface of the hot water sump portion 8. It is accumulated in the reservoir 8. Other functions are similar to those of the first embodiment of the invention.

In the first embodiment, the outflow portion 4 provided on the bottom surface of the melting crucible 1 is provided with a molten metal pool 8 at the lower end thereof.
Were connected, and the connected state was continuous, and the glass flow flowing inside was flowing along the upper surface of the inner wall of the hot water reservoir 8. Therefore, gas may be entrained in the molten glass 3 flowing on the inner wall surface, or the wall surface may be affected by heat to deteriorate the flow and generate a temperature distribution. On the other hand, in the third embodiment of the present invention, the lower end tip of the outflow portion 16 is projected downward from the upper surface of the inner wall of the basin 8, so that the glass flow traveling along the inner wall surface of the basin 8 as described above. Since this can be eliminated, the entrainment of gas and the occurrence of temperature distribution as described above can be suppressed.

[0030]

As described above, according to the first aspect of the present invention.
According to the molten glass pouring device of ~ 3, since the function of dividing the molten glass is provided in the pouring portion from the melting crucible to the pouring nozzle, the amount of glass required for pouring is carved. In addition to making it possible to pour in, and to eliminate the interference of heat between the upper and lower parts, it is possible to control the temperature of the pouring part independently, that is, to adjust the viscosity independently.Furthermore, since the glass fluid is not continuous, it was accumulated and measured with molten glass It is possible to prevent the glass from being pulled to each other and worsening the amount adjustment and the liquid shortage. In addition, by providing a molten metal reservoir at the pouring portion between the melting crucible and the pouring nozzle, it becomes possible to freely change the amount of molten glass that can be poured.

[Brief description of drawings]

FIG. 1 is a sectional view showing Embodiment 1 of the present invention.

FIG. 2 is a sectional view showing Embodiment 2 of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional technique.

FIG. 5 is a sectional view showing a conventional technique.

[Explanation of symbols]

 1 Melt crucible 3 Molten glass 4,16 Outflow part 5,14 Stop valve 6,15 Gas nozzle 8 Hot water reservoir 11 Pouring nozzle 13 Pouring part

Claims (3)

[Claims] 1. An outflow part for outflowing molten glass in the melting crucible is provided on the bottom surface of the melting crucible, a movable stop valve for opening and closing the outflow part is provided in the melting crucible, and the outflow part is provided. A molten glass pool is provided at the lower end of the pool, a pouring nozzle is provided at the bottom of the pool for pouring out the molten glass in the pool, and a gas nozzle is provided to send gas to the outlet. A molten glass pouring device comprising a pressure flow rate adjusting device for sending gas to the gas nozzle. 2. The molten glass pouring device according to claim 1, wherein the gas nozzle is provided on a side surface of the outflow portion. 3. The molten glass pouring device according to claim 1, wherein the gas nozzle is provided so as to penetrate the stop valve.