JP2021100894A - Method and device for producing glass body - Google Patents

Abstract

To provide a method and a device for producing a glass body that can suitably produce the glass body by cast molding.SOLUTION: The present disclosure provides a method for producing a glass body by cast molding, including the steps of: pouring fused glass G1 into an upward opening cavity 14 of a casting mold 12 through an opening of the casting mold 12; and taking out the glass body molded in the cavity 14 of the casting mold 12. In the step of pouring the glass G1, a vibrator 13 vibrates the casting mold 12 along directions including the vertical direction and the horizontal direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a method for producing a glass body and an apparatus for producing a glass body.

Conventionally, as disclosed in Patent Document 1, a casting molding method is known as a molding method for molding a glass body such as a glass ingot. The cast molding method of a glass body includes a step of pouring molten glass into a cast mold cavity through a cast mold opening having a cavity that opens upward.

Japanese Unexamined Patent Publication No. 2015-209364

When the glass body is molded by the casting molding method, a part of the molten glass poured into the cavity of the casting mold may be easily seized on the inner surface of the cavity depending on the glass composition. The glass baked on the inner surface of the cast-type cavity may become a flow resistance of the glass flowing along the inner surface of the cavity, or it may take time and effort to take out the glass body formed in the cavity. .. As described above, there is still room for improvement in the casting molding method of the glass body.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method for producing a glass body and an apparatus for producing a glass body capable of suitably producing the glass body by using a casting molding method. It is in.

A method for manufacturing a glass body that solves the above problems includes a step of pouring molten glass into the cast-type cavity from the opening of the cast-type having a cavity that opens upward, and a step of pouring molten glass into the cast-type cavity. It is a manufacturing method of a glass body for manufacturing a glass body by a casting molding method including a step of taking out a molded glass body, and in the step of pouring the glass, the casting mold is moved up and down by a vibration device. Vibrate along the direction including the horizontal direction.

According to this method, the adhesion between the inner surface of the cast-type cavity and the glass can be reduced. Therefore, it is possible to prevent the glass from being seized on the inner surface of the cast-type cavity. As a result, for example, the flow of glass along the inner surface of the cast-type cavity is promoted, so that the filling property of the glass in the cast-type cavity can be improved. Further, for example, it is possible to easily take out a glass body formed in a casting mold cavity.

In the method for manufacturing a glass body, the vibration device preferably includes a vibration motor.
According to this method, a predetermined vibration force can be stably transmitted to the casting mold.

In the method for manufacturing a glass body, the vibration device includes a mounting portion on which a casting mold is placed, a vibration portion provided below the previously described mounting portion, the previously described mounting portion, and the vibration portion. It is preferable to include a columnar member for connecting the above.

According to this method, the vibration generated in the vibrating portion can be stably transmitted to the mounting portion. Here, the mounting portion becomes extremely hot due to the casting mold being mounted, but the vibration portion is protected from heat by transmitting vibration through the columnar member described above, and a stable glass body is provided. Manufacture becomes possible. Further, by appropriately selecting the material of the columnar member, the amplitude of the vibration generated in the vibrating portion can be amplified by the columnar member. In this case, the cast mold mounted on the mounting portion is transmitted with the vibration amplified rather than the vibration generated in the vibration portion, so that the inner surface of the cast mold cavity and the glass adhere to each other. Can be further reduced.

In the method for manufacturing a glass body, the shape of the cast-type cavity may be a columnar shape extending in the vertical direction.
In the method for manufacturing a glass body, the shape of the cast-type cavity may be a vertically long rectangular parallelepiped shape.

In the method for manufacturing a glass body, the cast mold includes a cast mold main body having an inner surface of the cavity and a heat insulating material for keeping the cast mold main body warm, and the heat insulating material is the cast mold main body. Of the outer peripheral surfaces of the above, it is preferable that the outer peripheral surface is provided only on the outer peripheral surface on the short side side of the cavity when viewed from above.

According to this method, it is possible to suppress a temperature drop in the portion of the cavity that is on the short side side when viewed from above. As a result, the glass easily flows in the portion of the cast-type cavity on the short side side, so that the filling property of the glass in the cavity can be improved.

In the method of manufacturing the glass body, in the step of pouring the glass, cold air or a cooling liquid is brought into contact with the outer peripheral surface of the long side side of the cavity in the upper view of the outer peripheral surface of the cast-type main body having the inner surface of the cavity. It is preferable to let it.

According to this method, deterioration of the cast-type main body can be suppressed by suppressing the temperature rise of the wall portion on the long side side of the cavity in the top view of the peripheral wall of the cast-type main body.
In the method for manufacturing a glass body, it is preferable that the casting mold includes a bottom surface member having an inner bottom surface of the cavity, and the bottom surface member is configured to be movable to the opening of the cavity.

According to this method, since the head of the glass flowing down from the supply nozzle can be reduced, it is possible to avoid bubbles and veins generated by folding the glass flowing down on the bottom member of the cavity.

In the method of manufacturing the glass body, in the step of pouring the glass, the capacity of the cavity is increased by lowering the bottom surface member in response to an increase in the amount of the glass flowing into the casting mold cavity. It is preferable to let it.

According to this method, the time until the glass flowing out from the supply nozzle reaches the inner bottom surface of the cavity or the glass in the cavity can be maintained within a predetermined range. That is, the temperature of the glass reaching the inner bottom surface of the cavity and the glass in the cavity can be maintained within a predetermined range.

In the method for manufacturing a glass body, in the step of taking out the glass, it is preferable to push out the glass in the cavity by moving the bottom member toward the opening of the cavity.

According to this method, the glass can be easily taken out from the inside of the cast-type cavity by using the bottom member.
In the method for producing a glass body, it is preferable that the cast-type cavity has an inner surface made of carbon.

In the method for producing a glass body, the composition of the glass is SiO ₂ : 50 to 72%, Al ₂ O ₃ : 0 to 22%, B ₂ O ₃ : 15 to 38%, Li ₂ O + Na _{2 in mass%.} It is preferable to contain O + K ₂ O: 0 to 3% and MgO + CaO + SrO + BaO: 0 to 12%.

The glass body manufacturing device is a glass body manufacturing device for manufacturing an ingot-shaped glass body, has a cavity that opens upward, and is a casting that receives molten glass supplied into the cavity from the opening. The cast-in mold is provided with a vibration device for vibrating the cast mold along a direction including a vertical direction and a horizontal direction.

According to the present invention, a glass body can be suitably manufactured by using a casting molding method.

It is an exploded perspective view which shows the manufacturing apparatus of the glass body in an embodiment. It is a front sectional view which shows the manufacturing apparatus of a glass body. It is a side sectional view which shows the manufacturing apparatus of a glass body. It is a right sectional view explaining the process of pouring glass. It is a right sectional view explaining the process of pouring glass. It is a right sectional view explaining the process of pouring glass. It is a right sectional view explaining the process of taking out a glass. It is a right sectional view explaining the process of taking out a glass. It is a perspective view which shows the glass body.

Hereinafter, a method for manufacturing a glass body and an embodiment of a glass body manufacturing apparatus will be described with reference to the drawings. In the drawings, for convenience of explanation, a part of the configuration may be exaggerated or simplified. In addition, the dimensional ratio of each part may differ from the actual one.

As shown in FIGS. 1 to 3, the glass body manufacturing apparatus 11 is an apparatus for manufacturing a glass body by a casting molding method, and includes the casting mold 12 and the casting mold 12 in the vertical direction and the horizontal direction. It is provided with a vibration device 13 that vibrates along the line. Hereinafter, in the drawings, the direction along the Z axis is the vertical direction, and the direction along the XY plane is the horizontal direction.

The cast mold 12 in the glass body manufacturing apparatus 11 has a cavity 14 that opens upward. The cast mold 12 receives the molten glass supplied from the opening of the cavity 14. The shape of the cavity 14 is a columnar shape extending in the vertical direction. That is, the cavity 14 has a shape in which the top and bottom are in the longitudinal direction. The shape of the cavity 14 of the present embodiment is a vertically long rectangular parallelepiped shape. The shape of the cavity 14 may be a columnar shape, a cubic shape, a polygonal columnar shape, or the like. Further, the shape of the cavity 14 may be a shape extending in the horizontal direction.

The cast mold 12 of the present embodiment includes a cast mold main body 15 having an inner surface of the cavity 14, and a heat insulating material 16 provided on the outer peripheral surface of the cast mold main body 15.
The cast-type main body 15 includes a peripheral surface member 17 having an inner peripheral surface 14a of the cavity 14, and a bottom surface member 18 having an inner bottom surface 14b of the cavity 14. The bottom member 18 of the cast-type main body 15 is configured to be movable up to the opening of the cavity 14. More specifically, the peripheral surface member 17 has a tubular portion 17a into which the bottom surface member 18 is inserted, and a support portion 17b that supports the bottom surface member 18 arranged in the tubular portion 17a. The bottom surface member 18 can move up and down in the tubular portion 17a while being guided by the inner peripheral surface 14a of the tubular portion 17a. By lowering the bottom surface member 18 arranged in the tubular portion 17a in this way, the capacity of the cavity 14 can be increased. The bottom surface member 18 is supported by the support portion 17b of the peripheral surface member 17, so that the lower end position of the bottom surface member 18 is regulated. The shape of the support portion 17b of the peripheral surface member 17 is a plate shape having the first through hole H1, and is, for example, a protruding shape protruding from the lower end portion of the tubular portion 17a toward the inside of the tubular portion 17a. May be good. The cavity 14 of the cast-type main body 15 preferably has an inner surface made of carbon, that is, an inner peripheral surface 14a and an inner bottom surface 14b. In this embodiment, a case where the entire casting mold main body 15 is made of carbon is illustrated.

The heat insulating material 16 of the casting mold 12 is provided only on the outer peripheral surface of the peripheral surface member 17 of the casting mold main body 15 which is the short side side of the cavity 14 in the top view. More specifically, the outer peripheral surface of the peripheral surface member 17 on the short side side of the cavity 14 is composed of a first outer peripheral surface 15a and a second outer peripheral surface 15b on the opposite side of the first outer peripheral surface 15a. .. The heat insulating material 16 includes a first heat insulating material 16a provided on the first outer peripheral surface 15a and a second heat insulating material 16b provided on the second outer peripheral surface 15b. As the heat insulating material 16, for example, a refractory material can be preferably used. Examples of the refractory inorganic material include refractory bricks and refractory fiber mats. Examples of the fireproof fiber include glass wool, rock wool, ceramic wool, gypsum fiber, carbon fiber, stainless fiber, slag fiber, silica alumina fiber, alumina fiber, silica fiber, and zirconia fiber.

As shown in FIGS. 1 and 3, the outer peripheral surface of the peripheral surface member 17 which is the long side side of the cavity 14 in the top view is the third outer peripheral surface 15c and the fourth outer peripheral surface which is opposite to the third outer peripheral surface 15c. It is composed of an outer peripheral surface 15d. Both the third outer peripheral surface 15c and the fourth outer peripheral surface 15d of the peripheral surface member 17 are exposed.

As shown in FIGS. 1 to 3, the vibrating device 13 includes a mounting portion 19 on which the casting mold 12 is placed, a vibrating portion 20 provided below the mounting portion 19, and a mounting portion 19. It is provided with a columnar member 21 that connects the exciting portion 20. The shape of the mounting portion 19 is a plate shape having the second through hole H2, and the casting mold 12 is mounted on the upper surface of the mounting portion 19.

The vibration unit 20 of the vibration device 13 includes a vibration generation unit 20a and a mounting portion 20b to which the vibration generation unit 20a is attached. The vibration generating unit 20a generates vibration along a direction including a vertical direction and a horizontal direction. Since the vibration generating unit 20a can stably generate a predetermined vibration force, it is preferable to include a vibration motor. The vibration motor includes a weight that is connected to a rotating shaft and rotated around the rotating shaft. The vibration motor preferably generates circular vibration. A plurality of vibration motors that generate linear vibration may be used. Further, as the vibration generating unit 20a, a vibration generating device that vibrates by fluid pressure may be used.

The frequency of the vibration generated by the vibration generating unit 20a is preferably in the range of, for example, 20 Hz or more and 700 Hz or less. The amplitude of the vibration generated by the vibration generating unit 20a is preferably in the range of, for example, 0.1 mm or more and 0.3 mm or less.

The shape of the mounting portion 20b in the vibrating portion 20 of the vibrating device 13 is a plate shape having a third through hole H3, and the vibration generating portion 20a is fixed to the upper surface of the mounting portion 20b. The columnar member 21 of the vibration exciter 13 is composed of four columnar members 21 arranged so as to form the four corners of a quadrangle. Each columnar member 21 is fixed to the mounting portion 19 and the mounting portion 20b described above. The number of columnar members 21 is not limited to four, and may be a single number or a plurality of members other than four.

The vibrating device 13 further includes a leg member 22 that supports the mounting portion 20b of the vibrating portion 20. The leg member 22 is composed of four leg members 22 that are continuous with each of the four columnar members 21. The number of leg members 22 may be three or five or more.

The glass body manufacturing apparatus 11 of the present embodiment further includes an elevating device 23 for elevating and lowering the bottom member 18 of the cast-type main body 15. The elevating device 23 includes a shaft-shaped member 24 extending in the vertical direction and a driving unit 25 for reciprocating the shaft-shaped member 24 in the vertical direction. The shaft-shaped member 24 can be inserted into the first through hole H1 of the peripheral surface member 17, the second through hole H2 of the mounting portion 19, and the third through hole H3 of the mounting portion 20b. The upper end portion of the shaft-shaped member 24 is in contact with the lower surface of the bottom surface member 18 of the cast-type main body 15. The lower end side of the shaft-shaped member 24 is connected to the drive unit 25.

Next, the method for producing the glass body of the present embodiment will be described together with the operation.
As shown in FIGS. 2 and 3, in order to manufacture a glass body, first, a glass body manufacturing apparatus 11 is arranged below the supply nozzle N for supplying the molten glass G1. More specifically, the glass body manufacturing apparatus 11 is arranged so that the glass G1 flowing down from the supply nozzle N is supplied to a position on the center side of the cavity 14 in the top view of the cavity 14 of the casting mold 12. Further, the upper end position of the shaft-shaped member 24 of the elevating device 23 is set so that the bottom member 18 of the cast-type main body 15 is arranged at a position on the opening side of the cavity 14, that is, the upper end side of the peripheral surface member 17.

The method for manufacturing the glass body is a step of pouring the molten glass G1 into the cavity 14 of the casting mold 12 from the opening of the casting mold 12 and a step of taking out the glass body formed in the cavity 14 of the casting mold 12. And have. In the step of pouring the glass G1, the vibration exciter 13 vibrates the casting mold 12 in a direction including a vertical direction and a horizontal direction. In other words, the cast mold 12 vibrates in the vertical direction and also in the horizontal direction.

According to this method, the adhesion between the inner surface of the cavity 14 of the casting mold 12 and the glass G1 can be reduced. As a result, it is possible to prevent the glass G1 from being seized on the inner surface of the cavity 14. Therefore, for example, the glass G1 easily flows so as to spread along the inner bottom surface 14b of the cavity 14.

In the vibration device 13 of the present embodiment, the vibration of the vibration unit 20 can be transmitted to the mounting unit 19 via the columnar member 21. By transmitting vibration from a position separated via the columnar member 21 to the mounting portion 19 in this way, the vibration exciting device 13 is protected from heat, and a stable glass body can be manufactured. Further, if the columnar member 21 is made of an elastic body such as a heat-resistant resin, the amplitude of the vibration of the vibrating portion 20 can be amplified by the columnar member 21. In this case, the casting mold 12 mounted on the mounting portion 19 is transmitted with the vibration amplified rather than the vibration generated by the vibration exciting portion 20, so that the vibration is transmitted to the inner surface of the cavity 14 of the casting mold 12. The adhesion with the glass G1 can be further reduced.

Further, the bottom surface member 18 of the cast-type main body 15 is arranged at a position on the upper end side of the peripheral surface member 17 as described above. That is, when the step of pouring the glass G1 is started, the inner bottom surface 14b of the cavity 14 is arranged at a position closer to the tip (lower end) of the supply nozzle N, so that the inner bottom surface 14b of the cavity 14 is moved from the supply nozzle N to the inner bottom surface 14b of the cavity 14. It is possible to suppress the temperature drop of the flowing glass G1. Therefore, the glass G1 is more likely to flow so as to spread along the inner bottom surface 14b of the cavity 14 of the casting mold 12.

In the cavity 14, the portion of the cast-type main body 15 that is on the short side in the top view tends to lower the temperature of the glass G1 by the time the glass G1 that has flowed into the center of the cavity 14 reaches, resulting in insufficient filling of the glass G1. It is easy to occur. Since the cast mold 12 of the present embodiment includes the heat insulating material 16 described above, it is possible to suppress a temperature drop in the portion of the cavity 14 that is on the short side side when viewed from above. As a result, the glass G1 easily flows in the portion of the cavity 14 on the short side side, so that the filling property of the glass G1 in the cavity 14 can be improved.

In the step of pouring the glass G1, the temperature of the cast-type main body 15 rises due to the glass G1 flowing into the cavity 14. At this time, of the inner peripheral surface 14a of the cavity 14, the surface of the cast-type main body 15 that is on the long side when viewed from above is in contact with the glass G1 having a relatively high temperature. That is, among the peripheral walls of the cast-type main body 15, the wall portion on the long side side of the cavity 14 in the top view tends to rise in temperature and deteriorate easily. Therefore, in the step of pouring the glass G1, as shown in FIG. 3, among the outer peripheral surfaces of the cast-type main body 15, the outer peripheral surface which is the long side side of the cavity 14 in the top view, that is, the third peripheral surface member 17. It is preferable to bring the cold air W or the cooling liquid into contact with the outer peripheral surface 15c and the fourth outer peripheral surface 15d. As a result, the deterioration of the cast-type main body 15 can be suppressed by suppressing the temperature rise of the wall portion on the long side side of the cavity 14 in the top view of the peripheral wall of the cast-type main body 15. As a method of bringing the cold air W into contact, air having a temperature lower than the temperature of the glass G1 flowing in from the supply nozzle N is applied to the third outer peripheral surface 15c and the fourth outer peripheral surface 15d of the casting type main body 15 by using a fan. There is a method of spraying toward. Further, as a method of bringing the coolant into contact, for example, a method of spraying the coolant on the third outer peripheral surface 15c and the fourth outer peripheral surface 15d of the casting type main body 15, and a refractory material impregnated with the coolant are cast. Examples thereof include a method of bringing the third outer peripheral surface 15c of the mold body 15 into contact with the fourth outer peripheral surface 15d. Examples of the coolant include water, an organic solvent and the like.

As shown in FIGS. 4 and 5, in the step of pouring the glass G1, the capacity of the cavity 14 is increased by lowering the bottom surface member 18 in accordance with the increase in the inflow amount of the glass G1 flowing into the cavity 14. More specifically, in the step of pouring the glass G1, the bottom surface member 18 is lowered so that the distance between the tip of the supply nozzle N and the upper surface of the glass G1 in the cavity 14 is within a predetermined range. At this time, the casting mold 12 is vibrated by the vibration exciter 13 in a direction including a vertical direction and a horizontal direction. As a result, it is possible to promote the descent of the glass G1 in the cavity 14 following the bottom surface member 18. The bottom member 18 may be lowered continuously or intermittently.

As shown in FIG. 6, in a state where the bottom surface member 18 is lowered to the lower end position, a step of pouring the glass G1 into the cavity 14 is performed until a predetermined amount of the glass G1 is filled. After the step of pouring the glass G1, the casting mold 12 is carried out from the mounting portion 19 of the vibration device 13.

As shown in FIGS. 7 and 8, in the step of taking out the glass body G2 formed in the cavity 14, the bottom member 18 is moved toward the opening of the cavity 14 to push out the glass body G2 in the cavity 14. .. More specifically, the bottom surface member 18 is moved by pressing the bottom surface member 18 with the pressing member 26 inserted into the first through hole H1 of the casting type main body 15. With the movement of the bottom member 18, the glass body G2 is pushed out from the opening of the cavity 14.

By slowly cooling the glass body G2 taken out from the cavity 14 in a slow cooling furnace, the ingot-shaped glass body G3 shown in FIG. 9 can be obtained. The glass body G3 is used by cutting it into a desired shape such as a plate shape. Applications of the glass body G3 include, for example, high-frequency device applications, optical components, interior / exterior materials, and the like.

Examples of the glass of the glass body G3 include soda glass, soda lime glass, borosilicate glass, aluminosilicate glass, alkali-containing glass, non-alkali glass, and crystalline glass. When the glass body G3 is crystalline glass, the method for producing the glass body may further include a step of crystallizing by heating and firing to obtain a glass body made of crystallized glass.

For example, as an example of glass preferably used for high frequency device applications, the glass composition is SiO ₂ : 50 to 72%, Al ₂ O ₃ : 0 to 22%, B ₂ O ₃ : 15 to 38 in mass%. %, Li ₂ O + Na ₂ O + K ₂ O: 0 to 3%, MgO + CaO + SrO + BaO: 0 to 12%. This glass has a low dielectric property, and has, for example, a relative permittivity of 5 or less at 25 ° C. and a frequency of 10 GHz. In addition, "Li ₂ O + Na ₂ O + K ₂ O" refers to the total amount of _{Li 2} O, Na ₂ O and K _{2 O.} "MgO + CaO + SrO + BaO" refers to the total amount of MgO, CaO, SrO and BaO. The "relative permittivity at 25 ° C. and a frequency of 10 GHz" can be measured by, for example, a well-known cavity resonator method.

Next, the operation and effect of this embodiment will be described.
(1) The method for manufacturing the glass body G3 is a method for manufacturing the glass body G3 by a casting molding method, in which the molten glass G1 is poured into the cavity 14 of the casting mold 12 from the opening of the cavity 14 that opens upward. And a step of taking out the glass body G2 formed in the cavity 14 of the casting mold 12. In the step of pouring the glass G1, the vibration exciter 13 vibrates the casting mold 12 in a direction including a vertical direction and a horizontal direction.

According to this method, the adhesion between the inner surface of the cavity 14 of the casting mold 12 and the glass G1 can be reduced. Therefore, it is possible to prevent the glass G1 from being seized on the inner surface of the cavity 14 of the casting mold 12. As a result, for example, the flow of the glass G1 along the inner surface of the cavity 14 of the casting mold 12 is promoted, so that the filling property of the glass G1 in the cavity 14 of the casting mold 12 can be improved. Further, for example, the glass body G2 formed in the cavity 14 of the casting mold 12 can be easily taken out. Therefore, the glass body G3 can be suitably manufactured by using a casting molding method.

(2) The vibrating device 13 preferably includes a vibration motor. In this case, a predetermined vibration force can be stably transmitted to the casting mold 12.
(3) The vibrating device 13 connects the mounting portion 19 on which the casting mold 12 is placed, the vibrating portion 20 provided below the mounting portion 19, and the mounting portion 19 and the vibrating portion 20. A columnar member 21 is provided.

In this case, the vibration generated by the vibrating unit 20 can be stably transmitted to the mounting unit 19. Here, the mounting portion 19 becomes extremely hot due to the casting mold 12 being mounted, but the vibration portion 20 is protected from heat by transmitting vibration through the columnar member 21 described above and is stable. The glass body G3 can be manufactured. Further, by appropriately selecting the material of the columnar member 21, the amplitude of the vibration generated in the vibrating portion 20 can be amplified by the columnar member 21. Therefore, the casting mold 12 mounted on the mounting portion 19 is transmitted with the vibration amplified rather than the vibration generated by the vibration exciting portion 20, so that the inside surface of the cavity 14 of the casting mold 12 is reached. The adhesion with the glass G1 can be further reduced. Therefore, it is possible to further suppress the glass G1 from being seized on the inner surface of the cavity 14 of the casting mold 12.

(4) The shape of the cavity 14 of the casting mold 12 is a vertically long rectangular parallelepiped shape. The cast mold 12 includes a cast mold main body 15 having an inner surface of the cavity 14, and a heat insulating material 16 for keeping the cast mold main body 15 warm. The heat insulating material 16 is provided only on the outer peripheral surface of the cast-type main body 15 which is the short side side of the cavity 14 when viewed from above. In this case, it is possible to suppress a temperature drop in the portion of the cavity 14 that is on the short side when viewed from above. As a result, the glass G1 easily flows in the portion of the cavity 14 of the casting mold 12 on the short side side, so that the filling property of the glass G1 in the cavity 14 can be improved.

(5) In the step of pouring the glass G1, it is preferable that the cold air W or the cooling liquid is brought into contact with the outer peripheral surface of the cast-type main body 15 on the long side side of the cavity 14 when viewed from above. In this case, the deterioration of the cast-type main body 15 can be suppressed by suppressing the temperature rise of the wall portion on the long side side of the cavity 14 in the top view of the peripheral wall of the cast-type main body 15. Therefore, the number of times that the cast-type main body 15 can be used repeatedly can be increased.

(6) The casting mold 12 includes a bottom surface member 18 having an inner bottom surface 14b of the cavity 14 of the casting mold 12, and the bottom surface member 18 is configured to be movable to the opening of the cavity 14. In this case, since the head of the glass G1 flowing down from the supply nozzle N can be reduced, it is possible to avoid bubbles and veins generated by folding the glass G1 flowing down on the bottom surface member 18 of the cavity 14. Thereby, the quality of the obtained glass body G3 can be easily improved.

Further, for example, when the inner bottom surface 14b is damaged, the bottom surface member 18 can be replaced so that the portion other than the bottom surface member 18 can be reused in the casting mold 12. Further, for example, by using bottom members 18 having different thicknesses, glass bodies G3 having different dimensions can be formed. Further, for example, by supporting the bottom surface member 18 at a predetermined height in the cavity 14, it is possible to form a glass body G3 having different dimensions.

(7) In the step of pouring the glass G1, the capacity of the cavity 14 is increased by lowering the bottom surface member 18 in accordance with the increase in the inflow amount of the glass G1 that has flowed into the cavity 14 of the casting mold 12. In this case, the time required for the glass G1 flowing out of the supply nozzle N to reach the inner bottom surface 14b of the cavity 14 and the glass G1 in the cavity 14 can be maintained within a predetermined range. That is, the temperature of the glass G1 that reaches the inner bottom surface 14b of the cavity 14 and the glass G1 in the cavity 14 can be maintained within a predetermined range. For example, at the start of the step of pouring the glass G1, by arranging the bottom surface member 18 on the opening side of the cavity 14 of the casting mold 12, it is possible to suppress the temperature drop of the glass G1 until it reaches the bottom surface member 18. Therefore, the filling property of the glass G1 in the cavity 14 of the casting mold 12 can be further improved.

(8) In the step of taking out the glass body G2 in the cavity 14 of the casting mold 12, the glass body G2 in the cavity 14 is pushed out by moving the bottom surface member 18 toward the opening of the cavity 14. In this case, the glass body G2 can be easily taken out from the cavity 14 of the casting mold 12 by using the bottom surface member 18.

(Change example)
This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

-In the step of taking out the glass body G2, for example, the glass body G2 may be taken out from the cavity 14 by utilizing the own weight of the glass body G2 without using the bottom surface member 18.
-In the step of taking out the glass body G2, the shaft-shaped member 24 of the elevating device 23 may be used instead of the pressing member 26.

-At the start of the step of pouring the glass G1, the bottom surface member 18 may be arranged at a position at the lower end of the casting mold 12, and the step of pouring the glass G1 may be performed without moving the bottom surface member 18. In this case, the bottom member 18 may be fixed as the bottom wall of the cast-type main body 15.

-At least one of the first heat insulating material 16a and the second heat insulating material 16b of the casting mold 12 may be omitted.
-The mounting portion 19 and the columnar member 21 of the vibration device 13 may be omitted, and the casting mold 12 may be mounted on the mounting portion 20b of the vibration unit 20.

The vibration of the casting mold 12 by the vibration exciter 13 may be continuously performed from the start to the end of the step of pouring the glass G1, or may be performed intermittently. However, it is preferable that the vibration of the casting mold 12 by the vibrating device 13 is continuously performed from the start to the end of the step of pouring the glass G1. In this case, it is possible to further prevent the glass G1 from being seized on the inner surface of the cavity 14 of the casting mold 12.

-The number of supply nozzles N may be one or a plurality. However, from the viewpoint of the uniformity of the glass G1, the number of supply nozzles N is preferably one.
The shapes of the glass body G2 and the glass body G3 may be any shape as long as they can be taken out from the casting mold 12, and may be, for example, a shape having uneven portions.

11 ... Glass body manufacturing equipment, 12 ... Cast type, 13 ... Vibration device, 14 ... Cavity, 14b ... Inner bottom surface, 15 ... Cast type main body, 16 ... Heat insulating material, 18 ... Bottom member, 19 ... Placement Part, 20 ... Vibration part, 21 ... Columnar member, G1 ... Glass, G2, G3 ... Glass body, W ... Cold air.

Claims (13)

A step of pouring molten glass into the cast-type cavity through the cast-type opening having a cavity that opens upward.
A method for manufacturing a glass body, which comprises a step of taking out a glass body formed in the cavity of the casting mold and a step of taking out the glass body, wherein the glass body is manufactured by a casting molding method.
A method for manufacturing a glass body, in which the casting mold is vibrated in a direction including a vertical direction and a horizontal direction by a vibration exciter in the step of pouring the glass. The method for manufacturing a glass body according to claim 1, wherein the vibrating device includes a vibration motor. The vibration device includes a mounting portion on which a casting mold is placed, a vibration portion provided below the previously described mounting portion, and a columnar member connecting the previously described mounting portion and the vibration portion. The method for manufacturing a glass body according to claim 1 or 2, further comprising. The method for manufacturing a glass body according to any one of claims 1 to 3, wherein the shape of the cast-type cavity is a columnar shape extending in the vertical direction. The method for manufacturing a glass body according to any one of claims 1 to 4, wherein the shape of the cast-type cavity is a vertically long rectangular parallelepiped shape. The cast mold includes a cast mold main body having an inner surface of the cavity and a heat insulating material for keeping the cast mold main body warm, and the heat insulating material is a top view of the outer peripheral surface of the cast mold main body. The method for manufacturing a glass body according to claim 5, wherein the glass body is provided only on the outer peripheral surface on the short side side of the cavity. Claim 5 or claim that in the step of pouring the glass, of the outer peripheral surface of the cast-type main body having the inner surface of the cavity, cold air or a cooling liquid is brought into contact with the outer peripheral surface on the long side side of the cavity in a top view. The method for producing a glass body according to 6. The casting mold comprises a bottom surface member having an inner bottom surface of the cavity, and the bottom surface member is configured to be movable to the opening of the cavity, according to any one of claims 1 to 7. The method for manufacturing a glass body according to the description. The eighth aspect of the present invention, wherein in the step of pouring the glass, the capacity of the cavity is increased by lowering the bottom surface member in response to an increase in the inflow amount of the glass flowing into the casting mold cavity. Manufacturing method of glass body. The method for manufacturing a glass body according to claim 8 or 9, wherein in the step of taking out the glass, the bottom member is moved toward the opening of the cavity to push out the glass in the cavity. The method for producing a glass body according to any one of claims 1 to 10, wherein the cast-type cavity has an inner surface made of carbon. The composition of the glass is SiO ₂ : 50 to 72%, Al ₂ O ₃ : 0 to 22%, B ₂ O ₃ 15 to 38%, Li ₂ O + Na ₂ O + K ₂ O: 0 to 3% in mass%. , And MgO + CaO + SrO + BaO: The method for producing a glass body according to any one of claims 1 to 11, which contains 0 to 12%. A glass body manufacturing device for manufacturing ingot-shaped glass bodies.
A cast mold having a cavity that opens upward and accepting molten glass that is supplied into the cavity through the opening.
A glass body manufacturing apparatus including a vibrating apparatus that vibrates the casting mold along a direction including a vertical direction and a horizontal direction.

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