JP7330433B2 - Glass article manufacturing apparatus and manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a manufacturing apparatus and manufacturing method for glass articles, and more particularly to improvement of a conditioning tank provided in a transfer apparatus for transferring molten glass from a melting furnace to a forming apparatus.

As is well known, an apparatus for manufacturing glass articles includes a melting furnace for producing molten glass from frit, a forming apparatus for forming the molten glass, and a transfer apparatus for transferring the molten glass flowing out of the melting furnace to the forming apparatus. Prepare. For example, a clarification tank, an agitation tank, a conditioning tank, etc. are arranged in order from the upstream side in the transfer device.

The clarifier removes air bubbles in the molten glass flowing out of the melting furnace. The stirring tank stirs and homogenizes the molten glass with a stirrer. The conditioning tank mainly adjusts the viscosity and flow rate of the molten glass immediately before supplying the molten glass to the molding apparatus.

Since the flow of molten glass in the conditioning tank tends to be stagnant, devitrification (crystallization) may occur around the liquid surface of the molten glass. To address this problem, Patent Document 1 discloses suppressing devitrification by lowering the liquid level of the molten glass in the conditioning tank.

JP 2017-14067 A

By the way, the conditioning tank disclosed in Patent Document 1 has an open top opening. This opening serves as an insertion port for a plunger that dams the downward flow of molten glass. Moreover, the gas (mainly the vapor obtained by vaporizing the molten glass) in the conditioning tank is released to the outside from the opening. However, conventionally, no attention has been paid to this emitted gas, and the actual situation is that it is left as it is. This is because most of the bubbles in the molten glass are removed in the fining tank, and it was believed that the conditioning tank generated only a small amount of gas due to bubbles.

As a result of intensive research, the present inventors have found that various harmful effects can occur due to the gas released from the opening of the conditioning tank when the molten glass is being formed in the forming apparatus. did.

To explain an example of its adverse effects, tin oxide or the like as a refining agent remains in the molten glass in the conditioning tank. If the opening at the upper end of the conditioning tank is open, residual tin oxide or the like volatilizes, and volatile matter may adhere to the inner surface near the opening. Moreover, since the temperature in the vicinity of the opening is lowered due to the influence of the outside air, the volatile matter is likely to liquefy or solidify and adhere to the opening, and the volatile matter tends to aggregate after adhering. As a result of these factors, the volatile matter adhering to the inner surface near the opening falls into the molten glass over time and becomes foreign matter. As a result, the quality of the glass article, which is a product, is deteriorated or the product yield is deteriorated.

In view of the above, it is an object of the present invention to avoid the adverse effects that may occur due to the open opening of the conditioning tank provided in the transfer device.

The first aspect of the present invention, which was invented to solve the above problems, is a glass article having a conditioning tank for adjusting the state of molten glass in a transfer device for transferring molten glass from a melting furnace to a molding device. In the manufacturing apparatus, the conditioning tank is characterized by comprising: a cylindrical portion having a central axis extending in the vertical direction and having an opening at the upper end; and a lid covering the opening of the cylindrical portion. .

According to this apparatus for manufacturing a glass article, the opening of the tubular portion is covered with the lid particularly when the molten glass is being formed by the forming apparatus. Therefore, it is possible to avoid the adverse effects that may occur due to the opening of the cylindrical portion being open. Specifically, even if the tin oxide or the like remaining in the molten glass in the conditioning tank evaporates, the vicinity of the opening of the cylindrical portion is always maintained at a high temperature, so the volatile matter liquefies or solidifies. can be prevented from adhering to the inner surface near the opening. Therefore, it is possible to appropriately prevent the adhering volatile substances from falling into the molten glass and becoming foreign matter. In addition, since the amount of heat radiation from the opening is greatly reduced, the effect of preventing devitrification in the vicinity of the liquid surface of the molten glass can also be obtained. As a result, it is possible to improve the quality of the glass article as a product or improve the product yield.

In this case, the lid body preferably has a refractory material and a covering material made of platinum or a platinum alloy that covers at least the lower surface of the refractory material. Here, the "covering material" means a plate (thin plate) or a layer formed by thermal spraying. The term "refractory" as used herein means, for example, dense zircon, mullite, alumina-based, zirconia-based refractories, and the like.

In this way, the lower surface of the lid, which is a portion that is easily eroded, is covered with the covering material made of platinum or a platinum alloy, so that erosion of the lid can be efficiently suppressed and the durability can be improved. can. In addition, if the entire lid is made of platinum or a platinum alloy, the cost and weight increase. Weight reduction is realized.

In the above configuration, the cylindrical portion has a flange at its upper end that protrudes from the outer peripheral end of the lid body to the outer peripheral side, and the conditioning tank is located above the portion of the flange that protrudes from the lid body. and a flow rate reducing means for reducing the flow rate of the gas flowing out from the gap between the upper end of the cylindrical portion and the lid body toward the cooling pipe.

In this way, for example, the conditioning tank can be satisfactorily energized and heated. More specifically, the conditioning tank is normally electrically heated to adjust the temperature of the molten glass therein. From the viewpoint of layout, the electrodes for energizing and heating the conditioning tank are usually mounted on the above-mentioned flange. Therefore, the flange is cooled by the cooling pipe and the electrodes are thus protected from heat. In this case, the cooling pipe is mounted on the upper side of the flange. Therefore, when the gas generated from the molten glass in the conditioning tank (mainly the vapor of the molten glass vaporized) flows out from the gap between the upper end of the cylindrical part and the lid, the gas flows above the flange. can hit the cooling pipe. Due to the high temperature of this gas, there is a risk that the cooling pipes will be corroded by oxidation and damaged or broken. If the cooling pipe breaks, the coolant leaking from the cooling pipe may drop into the conditioning tank through the gap between the upper end of the cylindrical portion and the lid. In response to this, since the flow rate reducing means for reducing the flow rate of the gas directed to the cooling pipes is provided, it is difficult for the gas to hit the cooling pipes, and the probability of damage or breakage of the cooling pipes can be reduced. .

In this case, the flow rate reducing means may be a gas flow path provided in the lid.

In this way, the gas flow path provided in the lid causes the internal gas to flow out preferentially to the gap between the upper end of the cylindrical portion and the lid, thereby increasing the flow rate of the gas toward the cooling pipe. can be reduced. Therefore, the lid body is effectively used for constructing the flow rate reducing means, and a cheap and compact flow rate reducing means is realized.

In this configuration, the inlet and the outlet of the gas flow path may be formed at different positions in plan view.

Here, since the temperature in the vicinity of the outlet of the gas flow path is lowered due to the influence of the outside air, volatile substances such as tin oxide are likely to adhere to the inner circumferential surface of the outlet. Therefore, there is a possibility that the adhering volatile matter may drop into the molten glass over time. On the other hand, since the positions of the outlet and the inlet are different in a plan view, the inlet is not present in the path along which the volatile matter adhering to the inner peripheral surface of the outlet falls vertically downward. . This may prevent volatiles from falling through the inlet into the molten glass.

In this configuration, the inlet and the outlet of the gas channel may be formed so that the gas flows in different directions.

By doing so, even if the volatile matter adhering to the inner peripheral surface of the outflow port falls, it will easily stop in the middle of the gas flow path because the direction of gas flow is different between the inflow port and the outflow port. It becomes difficult to reach the inlet. This may also prevent volatiles from falling through the inlet into the molten glass.

Further, the flow rate reducing means may be a shielding wall arranged between the outer peripheral edge of the lid and the cooling pipe.

With this configuration, even if the gas generated from the molten glass flows out from the gap between the upper end of the tubular portion and the lid, the shielding wall prevents the gas from hitting the cooling pipe. As a result, the probability of damage or breakage of the cooling pipe can be reduced.

Further, the tubular portion may have a flange at its upper end, the conditioning tank may have a cooling pipe attached to the flange, and the cooling pipe may be attached to the lower side of the flange. good.

With this configuration, even if the gas generated from the molten glass flows out from the gap between the upper end of the cylindrical portion and the lid, the gas flows above the flange, so the lid is attached to the lower side of the flange. It will not hit the cooling pipe that is This reliably avoids damage or breakage of the cooling pipes.

A second aspect of the present invention, which has been devised to solve the above problems, comprises a transfer step of transferring the molten glass from the melting furnace to the molding device by a transfer device, and in the transfer step, the molten glass is placed in the transfer device. A method for manufacturing a glass article in which a condition adjustment process is performed to adjust the condition of molten glass in an adjustment tank, wherein the adjustment tank includes a cylindrical part having a central axis extending in the vertical direction and having an opening at the upper end, and a lid. and wherein the cover covers the opening of the tubular portion when the condition adjustment process is performed.

According to this manufacturing method, similarly to the manufacturing apparatus described above, it is possible to appropriately prevent volatile substances from falling into the molten glass.

According to the present invention, the adverse effects that may occur due to the open opening of the conditioning tank arranged in the transfer device are suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic side view which shows the whole structure of the manufacturing apparatus of the glass article which concerns on embodiment of this invention. It is a perspective view which shows the upper structure of the conditioning tank which concerns on 1st Embodiment of this invention. FIG. 3 is a longitudinal front view cut along line AA of FIG. 2; It is a perspective view which shows an example of the cover body used by 1st Embodiment of this invention. FIG. 4 is a perspective view showing another example of the lid body used in the first embodiment of the present invention; It is a longitudinal front view for explaining a problem of a 1st embodiment of the present invention. It is a vertical front view which shows the upper structure of the conditioning tank which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the upper structure of the conditioning tank which concerns on 3rd Embodiment of this invention. FIG. 9 is a longitudinal front view cut along line BB of FIG. 8; It is a vertical front view which shows the upper structure of the conditioning tank which concerns on 4th Embodiment of this invention. It is a vertical front view which shows the upper structure of the conditioning tank which concerns on 5th Embodiment of this invention. It is a perspective view which shows the upper structure of the conditioning tank which concerns on 6th Embodiment of this invention. FIG. 13 is a longitudinal front view cut along line CC of FIG. 12; It is a perspective view which shows the upper structure of the conditioning tank which concerns on 7th Embodiment of this invention. FIG. 15 is a longitudinal front view cut along line DD of FIG. 14; It is a perspective view which shows the upper structure of the conditioning tank which concerns on 8th Embodiment of this invention. FIG. 17 is a longitudinal front view cut along line EE of FIG. 16; It is a perspective view which shows the upper structure of the conditioning tank which concerns on 9th Embodiment of this invention. FIG. 19 is a longitudinal front view taken along line FF of FIG. 18;

DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus and method for manufacturing a glass article according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[Glass article manufacturing equipment]
FIG. 1 illustrates the overall configuration of a manufacturing apparatus for glass articles according to the present invention. As shown in the figure, this manufacturing apparatus 1 can be roughly divided into a melting furnace 2 arranged at the upstream end to produce molten glass Gm from frit, and a molten glass Gm flowing out of the melting furnace 2 to the downstream side. It comprises a transfer device 3 for transferring toward and a forming device 4 for forming the molten glass Gm supplied from the transfer device 3 into a band-shaped plate glass Gp.

The transfer device 3 has, in order from the upstream side, a clarification tank 5 , one or more (two in the figure) stirring tanks 6 , and a conditioning tank 7 . The clarification tank 5 removes air bubbles in the molten glass Gm flowing out from the melting furnace 2 . The stirring tank 6 stirs and homogenizes the molten glass Gm with a stirrer 8 . The conditioning tank 7 mainly adjusts the viscosity of the molten glass Gm and the flow rate of the molten glass Gm to be supplied to the molding device 4 immediately before supplying the molten glass Gm to the molding device 4 .

The melting furnace 2 communicates with the clarification tank 5 via an upstream connection pipe 9 . The clarification tank 5 communicates with an upstream stirring tank 6 via an intermediate connection pipe 10 . The stirring tank 6 on the upstream side communicates with the stirring tank 6 on the downstream side through a downstream connection pipe 11 . The stirring tank 6 on the downstream side communicates with the conditioning tank 7 through a cooling pipe 12 . The conditioning tank 7 is composed of a cylindrical portion 13 as a large-diameter pipe, a reduced-diameter portion 14 as a conical pipe, and a lower portion 15 as a small-diameter pipe. The tubular portion 13 has an opening 16 at its upper end and a center axis extending in the vertical direction. The reduced-diameter portion 14 is connected to the lower end of the cylindrical portion 13 and has an inner diameter that gradually decreases as it moves downward. The lower portion 15 is connected to the lower end of the reduced diameter portion 14 . An inlet 17 of the conditioning bath 7 is provided on the side wall of the tubular portion 13 and communicates with the cooling pipe 12 . The outlet 18 of the conditioning tank 7 is the lower end opening of the lower part 15 .

The forming apparatus 4 has a formed body 19 for forming the sheet glass Gp by causing the molten glass Gm to flow down by an overflow downdraw method, and a large-diameter introduction pipe 20 for guiding the molten glass Gm to the formed body 19 . The lower part 15 of the conditioning tank 7 is inserted into the introduction pipe 20 , and the lower end of the lower part 15 is immersed in the molten glass Gm inside the introduction pipe 20 . With this configuration, the molten glass Gm is supplied from the conditioning tank 7 to the introduction pipe 20 .

[Method for producing glass article]
The method for manufacturing a glass article according to the present invention includes a melting step of heating frit in a melting furnace 2 to generate molten glass Gm, and a transfer of transferring the molten glass Gm from the melting furnace 2 to a molding device 4 by a transfer device 3. and a forming step in which the molten glass Gm supplied from the transfer device 3 is formed by the forming device 4 . In the forming step, the glass article is formed by the overflow down method. In the transfer step, a condition adjustment process for adjusting the condition of the molten glass Gm is performed by the condition adjustment tank 7 arranged in the transfer device 3 .

First to ninth embodiments of the upper portion of the conditioning tank 7, which is the main part of the present invention, will be described below.

[First embodiment]
FIG. 2 is a perspective view showing the upper structure of the conditioning tank 7 according to the first embodiment of the present invention, and FIG. 3 is a longitudinal front view cut along line AA in FIG. As shown in these figures, the opening 16 at the upper end of the tubular portion 13 is covered with the lid 21 during the transfer process and the molding process. More specifically, the tubular portion 13 has a flange 22 at its upper end. The lid 21 is placed on the inner peripheral portion 22a of the flange 22 while covering the opening 16, and can be easily attached and detached. The tubular portion 13 is made of platinum or a platinum alloy. Flange 22 is made of platinum or a platinum alloy or other metal. Here, in the illustrated example, the opening area of the opening 16 of the tubular portion 13 is substantially the same size as the pipeline area of the tubular portion 13, but the former may be smaller than the latter, or It can be big. In addition, the height of the liquid surface GL of the molten glass Gm is an intermediate position (especially a position near the upper end) between the upper end and the lower end of the inlet 17 (see FIG. 1) formed in the cylindrical portion 13. preferable.

An outer peripheral portion 22 b of the flange 22 protrudes from the outer peripheral end 21 a of the lid 21 . A cooling pipe 23 is attached to the upper side of the outer peripheral portion 22 b of the flange 22 . Specifically, the cooling pipe 23 is fixed to the upper surface of the outer peripheral portion 22b of the flange 22 so as to make approximately one turn along the circumferential direction. The coolant circulates in the cooling pipe 23, thereby cooling the flange 22, particularly the outer peripheral portion 22b. An electrode (not shown) for energizing and heating the conditioning tank 7 is attached to the outer peripheral portion 22 b of the flange 22 .

FIG. 4 is a perspective view showing the configuration of the lid 21. As shown in FIG. As shown in the figure, the lid body 21 is composed of a plurality of (two in the figure) refractories 24 and a thin plate 25 made of platinum or a platinum alloy covering the refractories 24 and serving as a covering material. be. The thin plates 25 include a lower thin plate 25a covering the lower surfaces of the two refractory materials 24, an outer peripheral thin plate 25b covering the entire outer peripheral surface of the two refractory materials 24, and interposed between the two refractory materials 24. and a partition thin plate 25c. Each of these thin plates 25a, 25b, 25c is integrated. As shown in FIG. 5, the two refractories 24 are separately covered with a lower thin plate 25a, an outer peripheral thin plate 25b and a partition thin plate 25c, and the two partition thin plates 25c are brought into contact so as to be separated from each other, or A configuration may be adopted in which they are joined together so that they cannot be separated from each other. Moreover, the thin plate 25 may cover the entire surface including the upper surface of the refractory 24 or may cover only the lower surface of the refractory 24 . The covering material is not limited to the thin plate 25, and may be a layer made of platinum or a platinum alloy formed by thermal spraying the refractory 24. FIG. Here, the refractory 24 is, for example, a dense zircon, mullite, alumina-based, or zirconia-based refractory (also referred to as "refractory" described below).

According to the glass article manufacturing apparatus 1 according to the first embodiment, the following effects can be obtained. When forming the molten glass Gm by the forming device 4 , the opening 16 of the tubular portion 13 in the conditioning tank 7 is covered with the lid 21 . Therefore, it is possible to avoid the adverse effects that may occur due to the opening 16 being open. Specifically, even if the tin oxide or the like remaining in the molten glass Gm in the conditioning tank 7 evaporates, the vicinity of the opening 16 of the cylindrical portion 13 is always maintained at a high temperature, so that the volatiles It can be prevented from liquefying or solidifying and adhering to the inner surface near the opening. Therefore, it is possible to appropriately prevent the adhering volatile substances from dropping into the molten glass Gm and becoming foreign matter. In addition, since the amount of heat radiation from the opening 16 is greatly reduced, the effect of preventing devitrification near the liquid surface GL of the molten glass Gm can also be obtained. As a result, it is possible to improve the quality of the glass article (glass plate) as a product or improve the product yield.

In addition, since the lower surface of the lid 21, which is a portion that is easily eroded, is covered with a thin plate (covering material) 25 made of platinum or a platinum alloy, the erosion of the lid 21 is efficiently suppressed and durability is improved. can be improved. In this case, if the entire lid body 21 is made of platinum or a platinum alloy, the cost and weight increase. and weight reduction.

In the configuration according to the first embodiment described above, as shown in an exaggerated manner in FIG. Vaporized vapor) may leak out. When the gas flows out through the gap 26 as indicated by the arrow a, the gas flows above the outer peripheral portion 22b of the flange 22 toward the outer peripheral side and can hit the cooling pipe 23. As shown in FIG. Since the gas is at a high temperature, the cooling pipe 23 may be corroded by oxidation and damaged or broken. If the cooling pipe 23 is broken, the cooling liquid leaking from the cooling pipe 23 may drop into the conditioning tank 7 through the gap 26 .

[Second embodiment]
The second embodiment of the present invention avoids such inconvenience. FIG. 7 is a longitudinal front view showing the upper structure of the conditioning tank 7 according to the second embodiment of the present invention. As shown in the figure, a through hole 27 is formed in the central portion of the lid 21 to allow the internal gas to flow upward as indicated by an arrow b. The inner peripheral surface of this through hole 27 is also covered with a covering material made of platinum or a platinum alloy. Since other configurations are the same as those of the above-described first embodiment, constituent elements common to both embodiments are denoted by the same reference numerals in FIG. 7, and descriptions thereof are omitted. In this way, the internal gas flows out from the through-hole 27 in the upward direction indicated by the arrow b prior to the gap 26, so there is an advantage that the gas is less likely to hit the cooling pipe 23. can get. Further, the through-hole 27 can be effectively used as a hole through which the shaft of the plunger is inserted when using the plunger that blocks the downward flow of the molten glass Gm.

In the configuration according to the above-described second embodiment, the outflow side (upper portion) of the inner peripheral surface of the through hole 27 formed in the lid body 21 is affected by the outside air and the temperature drops. Therefore, the outflow side of the inner peripheral surface of the through-hole 27 is in a state where volatile matter such as tin oxide is likely to liquefy or solidify and adhere to the surface, and the volatile matter tends to aggregate after adhering. Volatile matter adhering to the outflow side of the inner peripheral surface of the through hole 27 may drop into the molten glass Gm over time and become foreign matter. In this case, the amount of volatile matter adhering is smaller than the amount of volatile matter adhering to the vicinity of the inner surface of the opening of the conventional conditioning tank when the opening is open.

[Third embodiment]
The third embodiment of the present invention avoids such inconvenience. FIG. 8 is a perspective view showing the upper structure of the conditioning tank 7 according to the third embodiment of the present invention, and FIG. 9 is a longitudinal front view cut along line BB in FIG. As shown in these figures, the lid 21 is provided with a gas flow path 30 . More specifically, the lid 21 includes a flat base wall portion 31 covering the upper end of the cylindrical portion 13 and the upper surface of the inner peripheral portion 22 a of the flange 22 , and an annular or cylindrical base wall portion 31 provided on the base wall portion 31 . and a flat ceiling wall portion 33 covering the upper side of the side wall portion 32 . The gas flow path 30 is composed of an inlet 34 , an internal space 35 communicating with the inlet, and an outlet 36 communicating with the internal space 35 . The inflow port 34 is a through hole formed in the central portion of the base wall portion 31 . The internal space 35 is a space surrounded by the side wall portion 32 and the ceiling wall portion 33 . The outflow port 36 is a cutout portion formed at one circumferential upper portion of the side wall portion 32 . In this case, the positions of the inflow port 34 and the outflow port 36 are different in plan view. The center axis of the inlet 34 extends vertically, while the center axis of the outlet 36 extends horizontally. Therefore, the direction of gas flow at the inflow port 34 is the upward direction (direction of arrow c) substantially along the vertical direction, while the direction of gas flow at the outflow port 36 is the lateral direction substantially along the horizontal direction. (in the direction of arrow d).

Here, the base wall portion 31 has the same configuration as the lid body 21 in the above-described second embodiment (see FIG. 7). Both the side wall portion 32 and the ceiling wall portion 33 are preferably made of only refractory materials, but at least the portions of these refractory materials that come into contact with gas are covered with a covering material made of platinum or a platinum alloy. may Here, when the opening area of the inlet 34 is M1 and the opening area of the opening 16 is M2, M1/M2 preferably has a lower limit of 1/200 and an upper limit of 1/10. More preferably, the lower limit is 1/100 and the upper limit is 1/20. Also, the opening area of the outflow port 36 is made smaller than the opening area of the inflow port 34 . Furthermore, the height position of the outflow port 36 is set to the same level as or higher than the height position of the upper portion of the cooling pipe 23 . Note that the outflow port 36 is not limited to being formed at one place in the circumferential direction of the side wall portion 32, and may be formed at a plurality of places in the circumferential direction.

According to the glass article manufacturing apparatus 1 according to the third embodiment, the following effects can be obtained. The gas in the conditioning tank 7 preferentially flows into the internal space 35 from the inlet 34 of the gas flow path 30 and then flows out from the outlet 36 to the outside. In this case, since the temperature of the inner peripheral surface of the outflow port 36 is lowered due to the influence of the outside air, volatile substances such as tin oxide contained in the gas are liquefied or solidified on the inner peripheral surface. easy to adhere. If volatile matter adheres to the inner peripheral surface of the outflow port 36, the volatile matter may drop over time. However, since the position of the inlet 34 and the outlet 36 are different from each other in plan view and the gas flow direction is different, the inlet 34 does not exist in the path along which the volatiles fall, and the volatiles flow inside the outlet 36. It is received by the bottom portion of the peripheral surface and the upper surface of the base wall portion 31 . Therefore, the volatile matter is prevented from falling into the molten glass Gm. In addition, since the inner peripheral surface of the inlet 34 is not easily affected by the outside air, it is maintained at a high temperature. Therefore, it is possible to prevent volatile substances such as tin oxide from adhering to the inner peripheral surface of the inlet 34 .

In addition, since the height position of the outlet 36 is set to be equal to or higher than the height of the upper end of the cooling pipe 23, the gas flowing out from the outlet 36 in the direction of the arrow d is less likely to hit the cooling pipe 23. . Since the gas flowing out from the outflow port 36 has a higher temperature than the outside air, the gas gradually moves upward immediately after the outflow. Therefore, a situation in which the gas hits the cooling pipe 23 can be more reliably avoided.

[Fourth embodiment]
FIG. 10 is a longitudinal front view showing the upper structure of the conditioning tank 7 according to the fourth embodiment of the present invention. As shown in the figure, the configuration according to the fourth embodiment differs from the configuration according to the above-described third embodiment in that a receiving member 37 is installed on the base wall portion 31 of the lid body 21. It's there. The receiving member 37 has a hanging portion 37a extending downward from the lower portion of the base wall portion 31, and a receiving portion 37b extending laterally (horizontally) from the lower end of the hanging portion 37a. The receiving portion 37b is arranged in a space above the liquid surface GL of the molten glass Gm. The area of the receiving portion 37b (area in plan view) is larger than the opening area of the inlet 34, and the inlet 34 fits within the upper surface area of the receiving portion 37b in plan view. Since the rest of the configuration is the same as the configuration according to the above-described third embodiment, the same reference numerals are given to the components common to both embodiments in FIG. 10, and the description thereof will be omitted. According to the configuration according to the fourth embodiment, even if volatile substances adhering to the inner peripheral surface of the inlet 34 fall, or volatile substances fall from the internal space 35 through the inlet 34, the volatile substances are It is received by the receiving portion 37 b of the receiving member 37 . Therefore, it is possible to more reliably prevent the volatile substances from dropping into the molten glass Gm and becoming platinum foreign matter. Other actions and effects are substantially the same as those of the above-described third embodiment.

[Fifth embodiment]
FIG. 11 is a longitudinal front view showing the upper structure of the conditioning tank 7 according to the fifth embodiment of the present invention. As shown in the figure, the configuration according to the fifth embodiment differs from the configuration according to the above-described third embodiment in that the base wall portion 31 of the lid body 21 is displaced from the central portion to one side. The inflow port 34 is formed at a position opposite to the ceiling wall portion 33, and the outflow port 36 is formed at a position deviated from the central portion of the ceiling wall portion 33 to the other side. Therefore, the positions of the inlet 34 and the outlet 36 are different in plan view. In this case, the direction of gas flow at the inflow port 34 and the direction of gas flow at the outflow port 36 are the same, and both are upward directions substantially along the vertical line (arrow e direction and arrow f direction). is. Note that the side wall portion 32 is not formed with a cutout portion. Also, the internal space 35 of the gas flow path 30 is wider in the lateral direction than in the above-described third embodiment. Since other configurations are the same as those of the above-described second example, constituent elements common to both examples are denoted by the same reference numerals in FIG. 14, and descriptions thereof are omitted. According to the configuration according to the fifth embodiment, since the positions of the inlet 34 and the outlet 36 are different in plan view, the inlet 34 does not exist in the path along which the volatile substances fall, and the volatile substances It is received on the upper surface of the base wall portion 31 . Therefore, the volatile matter is prevented from falling into the molten glass Gm. In addition, since the gas flowing out from the outlet 36 is directed upward (in the direction of the arrow f) immediately after it is discharged, the gas is certainly less likely to hit the cooling pipe 23 .

[Sixth embodiment]
FIG. 12 is a perspective view showing the upper structure of the conditioning tank 7 according to the sixth embodiment of the present invention, and FIG. 13 is a longitudinal front view cut along line CC of FIG. The structure according to the sixth embodiment includes an annular or cylindrical side wall portion 32 in which the lid body 21 is arranged on the inner peripheral side portion 22a of the flange 22, and a flat plate-like ceiling covering the upper side of the side wall portion 32. and a wall portion 33 . The gas channel 30 is composed of an internal space 35 and an outlet 36 . The internal space 35 is a space surrounded by the side wall portion 32 and the ceiling wall portion 33 . The outflow port 36 is a cutout portion formed at one circumferential upper portion of the side wall portion 32 . According to the configuration according to the sixth embodiment, the gas in the conditioning tank 7 preferentially passes through the gap 26 between the upper end of the cylindrical portion 13 and the side wall portion 32, and the internal space 35 of the gas flow path 30. and flows out from the outflow port 36 to the outside. In this case, even if the volatile matter adhering to the inner peripheral surface of the outflow port 36 falls, the volatile matter will be removed from the bottom of the inner peripheral surface of the outflow port 36, the upper surface of the inner peripheral side portion 22a of the flange 22, and the cylindrical portion 13. is received by the upper end surface of the Therefore, volatiles can be prevented from falling into the molten glass Gm. In this case, the upper space (internal space 35) of the opening 16 is surrounded by the side wall portion 32 and the ceiling wall portion 33, and thus is maintained at a high temperature. Therefore, the vicinity of the opening 16 is in a state in which it is difficult for volatile substances such as tin oxide to adhere and aggregation of the volatile substances after adhesion is difficult to occur. This prevents the volatiles from adhering or aggregating in the vicinity of the opening 16 and prevents the volatiles from falling into the molten glass Gm from the vicinity of the opening 16 . Further, since the flow direction of the gas at the outflow port 36 is the horizontal direction as indicated by the arrow g, the flow resistance of the gas when passing through the gas flow path 30 is increased. As a result, a situation in which the flow rate of the gas passing through the gas flow path 30 becomes excessive can be avoided. Moreover, the height position of the outflow port 36 is set to be equal to or higher than the height position of the upper end of the cooling pipe 23 . Therefore, the gas flowing out from the outlet 36 in the direction of the arrow g is less likely to hit the cooling pipe 23 .

[Seventh embodiment]
FIG. 14 is a perspective view showing the upper structure of the conditioning tank 7 according to the seventh embodiment of the present invention, and FIG. 15 is a vertical cross-sectional front view showing a state cut along line DD of FIG. 14 and exaggerated. is. The configuration according to the seventh embodiment differs from the above-described first embodiment (see FIGS. 2 and 3) in that a flow rate reducing means is provided between the outer peripheral end 21a of the lid 21 and the cooling pipe 23. The shielding wall 40 is placed as the . The shielding wall 40 is fixed to the upper surface of the flange 22 and has an annular or tubular shape. The upper end of the shielding wall 40 is made higher than the upper end of the cooling pipe 23 . Since the rest of the configuration is the same as that of the above-described first embodiment, constituent elements common to both embodiments are denoted by the same reference numerals in FIGS. 14 and 15, and descriptions thereof are omitted. According to the seventh embodiment, even if the gas generated from the molten glass Gm in the conditioning tank 7 flows out from the gap 26 between the upper end of the cylindrical part 13 and the lid 21, the shielding wall 40 , the gas is prevented from impinging on the cooling pipe 23 . As a result, the probability of damage or breakage of the cooling pipe 23 can be reduced. Other actions and effects are substantially the same as those of the above-described first embodiment.

[Eighth embodiment]
FIG. 16 is a perspective view showing the upper structure of the conditioning tank 7 according to the eighth embodiment of the present invention, and FIG. 17 is a longitudinal front view cut along line EE in FIG. The configuration according to the eighth embodiment differs from the above-described first embodiment (see FIGS. 2 and 3) in that the cooling pipe 23 is attached to the lower side of the outer peripheral portion 22b of the flange 22. be. Since the rest of the configuration is the same as that of the above-described first embodiment, constituent elements common to both embodiments are denoted by the same reference numerals in FIGS. 16 and 17, and descriptions thereof are omitted. According to this eighth embodiment, even if the gas generated from the molten glass Gm in the conditioning tank 7 flows out from the gap 26 between the upper end of the cylindrical part 13 and the lid 21, the gas is It flows above 22. On the other hand, since the cooling pipe 23 is attached to the lower side of the flange 22 , the gas does not hit the cooling pipe 23 . Other actions and effects are substantially the same as those of the above-described first embodiment. In addition, in the eighth embodiment, the flange 22 does not need to protrude from the outer peripheral end of the lid body 21 to the outer peripheral side.

[Ninth Embodiment]
FIG. 18 is a perspective view showing the upper structure of the conditioning tank 7 according to the ninth embodiment of the present invention, and FIG. 19 is a longitudinal front view taken along line FF of FIG. The configuration according to the ninth embodiment differs from the above-described first embodiment (see FIGS. 2 and 3) in that the cooling pipe 23 is attached to the lower side of the outer peripheral side portion 22b of the flange 22, and the flange A recess 41 recessed downward is formed in the inner peripheral side portion 22a of the part 22, and the lid body 21 is fitted into the recess 41. As shown in FIG. According to the ninth embodiment, even if the gas flows out to the upper side of the flange 22 from the curved gap 26 between the upper end of the cylindrical portion 13 and the lid 21, the gas is attached to the lower side of the flange 22. It does not hit the cooling pipe 23 that is being held. Further, since the gap 26 is curved, the outflowing gas is directed upward immediately after the outflow. This also prevents the gas from hitting the cooling pipe 23 . Therefore, in this embodiment, the cooling pipe 23 may be mounted above the flange 22 .

In the above-described embodiment, the cylindrical portion 13 provided on the upper portion of the conditioning tank is cylindrical in the figure, but may be rectangular or polygonal when viewed from above. In addition, although the flange 22 formed at the upper end of the cylindrical portion 13 and the lid body 21 covering the opening 16 of the cylindrical portion 13 are circular in plan view in the figure, they are square or rectangular in plan view. It may be a polygon or the like.

1 Manufacturing device 2 Melting furnace 3 Transfer device 4 Forming device 5 Clarifying tank 6 Stirring tank 7 Conditioning tank 13 Cylindrical part 16 Opening 21 Lid body 21a Outer peripheral end 22 of lid body Flange 22a Flange inner peripheral side part 22b Flange Outer peripheral portion 23 Cooling pipe 24 Refractory 25 Covering material (thin plate)
26 gap 30 gas channel 34 inlet 36 outlet 40 shielding wall 41 recess Gm molten glass

Claims (7)

An apparatus for manufacturing glass articles, in which a transfer device for transferring molten glass from a melting furnace to a molding device is provided with a conditioning tank for adjusting the state of molten glass,
The condition adjusting tank includes a cylindrical portion having a center axis extending in the vertical direction and having an opening at the upper end, and a lid covering the opening of the cylindrical portion. Having a flange protruding from the outer peripheral edge of the lid to the outer peripheral side,
The conditioning tank flows out from a cooling pipe attached to the upper side of the portion of the flange protruding from the lid, and a gap between the upper end of the cylindrical portion and the lid and flows into the cooling pipe. and a flow rate reduction means for reducing the flow rate of the directed gas,
The apparatus for manufacturing a glass article, wherein the flow rate reducing means is a gas flow path provided in the lid. 2. The apparatus for manufacturing a glass article according to claim 1 , wherein an inlet and an outlet of said gas flow path are formed at different positions in plan view. 3. The apparatus for manufacturing glass articles according to claim 2 , wherein the inlet and the outlet of the gas channel are formed so that the gas flows in different directions. An apparatus for manufacturing glass articles, in which a transfer device for transferring molten glass from a melting furnace to a molding device is provided with a conditioning tank for adjusting the state of molten glass,
The condition adjusting tank includes a cylindrical portion having a center axis extending in the vertical direction and having an opening at the upper end, and a lid covering the opening of the cylindrical portion. Having a flange protruding from the outer peripheral edge of the lid to the outer peripheral side,
The conditioning tank flows out from a cooling pipe attached to the upper side of the portion of the flange protruding from the lid, and a gap between the upper end of the cylindrical portion and the lid and flows into the cooling pipe. and a flow rate reduction means for reducing the flow rate of the directed gas,
The apparatus for manufacturing glass articles, wherein the flow rate reducing means is a shielding wall arranged between the outer peripheral edge of the lid and the cooling pipe. The apparatus for manufacturing glass articles according to any one of claims 1 to 4, wherein the lid has a refractory and a covering material made of platinum or a platinum alloy covering at least the lower surface of the refractory. Manufacture of glass articles comprising a transfer step of transferring molten glass from a melting furnace to a molding device by a transfer device, wherein in the transfer step, a condition adjustment process is performed to adjust the state of the molten glass by a conditioning tank provided in the transfer device. a method,
The condition adjustment tank has a cylindrical portion having a central axis along the vertical direction and an opening at the upper end, and a lid. The lid covers
The cylindrical portion has a flange at its upper end that protrudes from the outer peripheral end of the lid to the outer peripheral side,
The conditioning tank flows out from a cooling pipe attached to the upper side of the portion of the flange protruding from the lid, and a gap between the upper end of the cylindrical portion and the lid and flows into the cooling pipe. and a flow rate reduction means for reducing the flow rate of the directed gas,
A method for manufacturing a glass article , wherein the flow rate reducing means is a gas flow path provided in the lid . Manufacture of glass articles comprising a transfer step of transferring molten glass from a melting furnace to a molding device by a transfer device, wherein in the transfer step, a condition adjustment process is performed to adjust the state of the molten glass by a conditioning tank provided in the transfer device. a method,
The condition adjustment tank has a cylindrical portion having a central axis along the vertical direction and an opening at the upper end, and a lid. The lid covers
The cylindrical portion has a flange at its upper end that protrudes from the outer peripheral end of the lid to the outer peripheral side,
The conditioning tank flows out from a cooling pipe attached to the upper side of the portion of the flange protruding from the lid, and a gap between the upper end of the cylindrical portion and the lid and flows into the cooling pipe. and a flow rate reduction means for reducing the flow rate of the directed gas,
A method for manufacturing a glass article, wherein the flow rate reducing means is a shielding wall disposed between the outer peripheral edge of the lid and the cooling pipe.

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