TWI471276B - A raw material supply method, a raw material supply device, and a glass plate manufacturing apparatus and a manufacturing method thereof - Google Patents

Description

Raw material supply method, raw material supply device, and glass plate manufacturing device and manufacturing method

The present invention relates to a raw material supply method and a raw material supply device for supplying a glass raw material to a melting tank of a glass melting furnace, and a glass plate manufacturing apparatus and a manufacturing method.

As a raw material supply method for supplying a glass raw material to a melting tank of a glass melting furnace, a method using a spiral feeder, a vibrating feeder, a blanket feeder, an oscillating feeder, or a combination thereof is generally known.

Among these, the combination of the blanket feeder and the oscillating feeder is as shown in FIG. 1, and the powdery or granular glass material 1 is dropped from the funnel 2 into the transfer tray (feeder) 3, The glass material 1 on the transfer surface 4 of the transfer tray 3 is placed in the melting tank 6 of the glass melting furnace 5 (for example, refer to Non-Patent Document 1).

Specifically, the conveying surface 4 of the transfer tray 3 is an inclined surface that faces the front side of the glass melting furnace 5 and is high. When the transfer tray 3 moves in the direction approaching the glass melting furnace 5, the glass raw material 1 is transferred (dropped) from the funnel 2 to the transfer surface 4. When the transfer tray 3 moves in a direction away from the glass melting furnace 5, the glass raw material 1 on the transfer surface 4 is introduced into the melting tank 6.

Prior technical literature Non-patent literature

Non-Patent Document 1: Yamane Masahiro is waiting for the "Glass Engineering Handbook" published in Asakura Bookstore, July 5, 1999, p.301-302, Figure 1.8(b)

However, since the conveying surface 4 is inclined toward the front side of the glass melting furnace 5, the front end portion 3a is disposed in the vicinity of the raw material input port 7, so that the glass material 1 is self-transferred from the conveying surface 4 even if it is inclined. It can also be thrown into the melting tank 6. Therefore, the transfer tray 3 is heated by the radiant heat from the glass melting furnace 5, and the glass raw material 1 on the transfer surface 4 becomes high temperature. Therefore, when the glass raw material 1 is deteriorated and the fluidity of the glass raw material 1 is deteriorated (decreased), it is difficult to stably introduce the glass raw material 1 into the melting tank 6 with a fixed amount.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a raw material supply method, a raw material supply device, and a glass plate which can stably input a glass raw material on a transfer surface to a glass melting furnace in a fixed amount. Manufacturing apparatus and manufacturing method.

In order to solve the above object, in the raw material supply method of the present invention, the glass raw material is dropped from the funnel into the transfer tray, and the transfer tray is reciprocated to feed the glass raw material on the transfer surface of the transfer tray to the melting tank of the glass melting furnace. When the transfer tray advances from the upstream end in the transport direction toward the downstream end in the transport direction, the cutter that can pierce the glass material on the transport surface moves to a standby position above the glass material on the transport surface. When the transfer tray is retracted toward the upstream end in the transport direction from the downstream end in the transport direction, the cutter moves to a position where the glass material is pierced on the transport surface, and the transport tray retreats simultaneously with the piercing The cutter that stops at a position causes at least a part of the glass raw material that is closer to the downstream side in the transport direction than the cutter to be relatively extruded from the transfer tray and is introduced into the melting tank.

The raw material supply device of the present invention includes a transfer tray that transports the glass raw material dropped from the funnel, and the transfer tray is reciprocated to feed the glass raw material on the transfer surface of the transfer tray to the melting tank of the glass melting furnace, including a cutter that can penetrate the glass material on the conveying surface; and when the conveying tray advances from the upstream end in the conveying direction toward the downstream end in the conveying direction, the cutter moves to the glass material on the conveying surface When the transfer tray is retracted toward the upstream end in the transport direction from the downstream end of the transport tray in the transport direction, the cutter moves to a position where the glass material is inserted into the transport surface, and the transfer tray is retracted. At least the part of the glass material which is closer to the downstream side in the conveyance direction than the cutter is relatively extruded from the transfer tray and is introduced into the melting tank.

The apparatus for producing a glass sheet of the present invention comprises: a raw material supply device of the present invention; a glass melting furnace for melting a glass raw material supplied from the raw material supply device; and a forming furnace through which the glass melting furnace is passed The molten molten glass is formed into a sheet glass.

The method for producing a glass sheet of the present invention uses the apparatus for producing a glass sheet of the present invention to produce a glass sheet.

According to the present invention, it is possible to provide a raw material supply method and a raw material supply device capable of stably feeding a glass raw material on a transfer surface to a glass melting furnace at a fixed amount, and a glass plate manufacturing apparatus and a production method.

Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.

Fig. 2 is a block diagram showing the configuration of a glass sheet manufacturing apparatus according to an embodiment of the present invention, and arrows indicate the flow direction of the glass raw material or the molten glass. FIG. 3 is a cross-sectional view for explaining the configuration and operation of the material supply device 10.

As shown in FIG. 2 and FIG. 3, the apparatus for manufacturing a glass sheet includes a raw material supply device 10 for introducing a powdery or granular glass raw material G into a glass melting furnace 11 and a glass melting furnace 11 by The glass raw material G supplied from the raw material supply device 10 is melted, and the forming furnace 12 is formed by molding the molten glass L melted by the glass melting furnace 11 into a sheet glass.

The glass melting furnace 11 may be of a well-known configuration, and includes, for example, a raw material input port 13, a melting tank 14, a clarification tank 15, and the like. Above the raw material input port 13, a dustproof plate 16 for preventing scattering of the glass raw material G at the time of supply of the raw material is provided. The glass raw material G which has been supplied from the raw material inlet 13 floats on the molten glass L in the melting tank 14, and moves to the downstream side of the melting tank 14 (on the side of the clarification tank 15).

The glass raw material G is heated in the process of moving to the side of the clarification tank 15 by the flame heat or radiant heat in the glass melting furnace 11 and the heat of conduction from the molten glass L, and is slowly melted into the molten glass L. In order to effectively melt the glass raw material G, it is necessary to introduce the glass raw material G into the melting tank 14 in a small amount, thinly, and stably at a fixed amount. The supply of the glass raw material G using the raw material supply device 10 will be described later.

Since the molten glass L is obtained by melting the powdery or granular glass raw material G, a large amount of air bubbles are contained inside. Therefore, the molten glass L is conveyed from the melting tank 14 to the clarification tank 15, and the bubble is floated up, it removes, and it clarifies. Further, a vacuum degassing tank may be provided between the clarification tank 15 and the forming furnace 12.

The forming furnace 12 can be of a well-known configuration, for example, in the so-called floating method, including the floating tank 17 and the like. The clarified molten glass L flows out onto the molten metal (for example, molten tin) in the floating tank 17, and becomes a plate glass by the smooth surface of the molten metal. The sheet glass is cooled while moving to the downstream side of the floating tank 17, thereby manufacturing a glass sheet.

Further, in the present embodiment, the forming furnace 12 includes the floating grooves 17 and the like, but the present invention is not limited thereto. For example, in the so-called melting method, the forming furnace 12 includes a molded body having a wedge-shaped cross section that is contracted downward. In this case, the clarified molten glass L flows down along both sides of the molded body and merges at the lower edge of the molded body to form a sheet glass. The sheet glass is cooled while being stretched downward, and a glass plate is produced.

The raw material supply device 10 is attached to the glass melting furnace 11 (melting tank 14), and a plurality of (for example, two) are arranged side by side (in FIG. 3, only one is shown). Each raw material supply device 10 includes a funnel 21 disposed adjacent to the glass melting furnace 11 and a transfer tray 22 that transports the glass raw material G dropped from the funnel 21 to the glass melting furnace 11 and a cutter 24 The glass raw material G on the conveying surface 23 of the conveying tray 22 can be pierced.

First, the funnel 21 will be described.

The funnel 21 is formed of a steel material (for example, SS (stainless steel) or the like. The funnel 21 is configured to have a cylindrical shape whose front end is tapered downward, and includes an inlet 21a on the upper side and an outlet 21b on the lower side. The funnel 21 is divided into a plurality of members in the vertical direction, and is expandable and contractible in the vertical direction. Thereby, the position of the conveyance tray 22 can be adjusted in the up-down direction.

Above the funnel inlet 21a, a mixer (not shown) in which a plurality of kinds of raw materials are weighed and mixed to obtain a glass raw material G is provided. The glass raw material G mixed by the mixer was dropped to the funnel inlet 21a, and stored in a funnel.

Further, the various raw materials before mixing are air-fed to the mixer through a raw material supply pipe (not shown). The inner circumference of the raw material supply pipe is covered with an electroformed brick or the like excellent in abrasion resistance.

A gap 25 is included between the funnel outlet 21b and the transfer surface 23 of the transfer tray 22. The glass material G in the funnel 21 is transported (dropped) from the gap 25 to the transfer surface 23.

The size of the gap 25, the inclination angle θ of the conveying surface 23 with respect to the horizontal plane, and the angle of repose of the glass material G are set so that the glass raw material G is appropriately conveyed to the conveying surface 23. The inclination angle θ (refer to FIG. 3) of the conveying surface 23 with respect to the horizontal plane is preferably 8 to 15 degrees, more preferably 10 to 12 degrees. The angle of repose of the glass material G is preferably from 30 to 45, more preferably from 35 to 40.

Here, the angle of repose is measured by the method described in JIS R 9301-2-2 "Alumina Powder - Part 2: Physical Property Measurement Method-2: Angle of Repose". More specifically, the angle of repose is defined by the following method, and the powder having a better fluidity has a smaller value: the sieve body is vibrated by a sieve having a diameter of 80 mm and a mesh of 710 μm, and the test body is stored in the funnel. The glass raw material G before the 21 is passed through the sieve, and the funnel from the height of 160 mm from the horizontal plane is gently dropped onto the platform with a diameter of 80 mm, and the busbar and the horizontal plane of the cone formed by the test body are measured. The corner of the game. Here, the amount of falling of the powder is the amount that falls until the angle of repose is substantially stabilized.

Next, the transfer tray 22 will be described.

The transfer tray 22 is formed of a steel material (for example, an SS material) or the like. The transfer tray 22 includes a flat body 31. The upper surface of the main body 31 serves as a conveying surface 23 that carries the glass raw material G dropped from the funnel 21. A pair of side plates 32 are protruded from the conveying surface 23 so as not to slide the glass material G on the conveying surface 23 in a direction orthogonal to the conveying direction.

Since the conveying surface 23 of the conveying tray 22 is an inclined surface, the front end portion 22a is often inserted into the glass melting furnace 11 from the raw material inlet 13 so that the glass raw material G can be slipped from the conveying surface 23 even if it is inclined. Inside the melting tank 14. Therefore, the transfer tray 22 is heated by the radiant heat from the glass melting furnace 11.

Therefore, the raw material supply device 10 includes a cooling mechanism that cools the transfer tray 22. As the cooling mechanism, for example, there is a refrigerant passage 33 provided inside the transfer tray 22. By allowing the refrigerant to flow through the refrigerant passage 33, the transfer tray 22 can be cooled, and the temperature rise of the glass raw material G on the transfer surface 23 can be suppressed.

In the glass raw material G of the glass substrate for a display, a boron compound is usually mixed and used. As the boron compound, boric acid (H ₃ BO ₃ ) is usually used. The boric acid is a hydrate, and if it is heated, water of hydration is released. Further, boric anhydride (B ₂ O ₃ ) obtained by subjecting boric acid to heat treatment may be used instead of boric acid, but the production cost may increase.

In the case where the glass raw material G contains a hydrate, when the transfer tray 22 is heated by the radiant heat from the glass melting furnace 11, the glass raw material G on the transfer surface 23 is heated to release the hydration. water. In this case, the fluidity of the glass raw material G on the transfer surface 23 is deteriorated (decreased), so that the glass raw material G is put into the melting tank 14 as a lump, and it is difficult to stably stabilize the glass raw material G by a fixed amount. It is put into the melting tank 14.

The glass raw material G that has been introduced into the melting tank 14 is heated by the heat of the flame or the radiant heat in the glass melting furnace 11 and the heat from the molten glass L, and is melted from the outside. Therefore, when it is supplied as a block, relatively large bubbles are supplied. Sealed inside. Air bubbles may become a defect in the manufactured glass sheet. In addition, since the glass raw material G contains a plurality of kinds of raw materials having different melting points, it is necessary to use a time when the glass raw material G is supplied as a block, and the composition of the molten glass L becomes uneven.

In the present embodiment, as described above, the inside of the transfer tray 22 is cooled to suppress the temperature rise of the glass raw material G on the transfer surface 23, so that the deterioration of the glass raw material G can be suppressed (the hydration water is released from the glass raw material G). . Thereby, the deterioration (decrease) of the fluidity of the glass raw material G on the conveying surface 23 can be suppressed, and the glass raw material G can be stably supplied to the melting tank 14 with a fixed amount.

The transport tray 22 is configured to reciprocate between the upstream end (retracted position) in the transport direction and the downstream end (forward position) in the transport direction. The transfer tray 22 includes a plurality of wheels 34 that are movable over a pair of rails 26. The guide rail 26 is supported by the frame 27, and guides the transfer tray 22 in the direction of the front low back height in the glass melting furnace 11. Therefore, the conveying surface 23 of the conveying tray 22 is an inclined surface which faces the front side of the glass melting furnace 11, and is high.

For example, as shown in FIG. 7, each of the raw material supply devices 10 includes a motor 41 fixed to the frame 27, a rotating circular plate 42 attached to a rotating shaft of the motor 41, and a rod 43 as an advancing and retracting mechanism 40 for advancing and retracting the transfer tray 22. At the centrifugal position of the rotating circular plate 42, one end of the rod 43 is rotatably coupled. The other end of the rod 43 is rotatably coupled to the transfer tray 22.

The motor 41 is connected to a control device 28 such as a computer. Under the control of the control device 28, when the rotating circular plate 42 is rotated by the rotation of the motor 41, one end of the rod 43 is rotated around the center of rotation of the rotating circular plate 42. Accordingly, the other end portion of the rod 43 swings, and the transfer tray 22 coupled to the other end portion of the rod 43 reciprocates on the guide rail 26.

Here, the stroke amount of the conveyance tray 22 (the movement distance between the upstream end in the conveyance direction and the downstream end in the conveyance direction) is appropriately set depending on the shape of the raw material input port 13, etc., but is preferably 80 mm to 150 mm, more preferably It is from 100 mm to 120 mm.

For example, as shown in FIG. 3, each material supply device 10 includes a moving carriage 51 and an elevating device 52 mounted on the moving cart 51 as an adjustment mechanism for adjusting the relative positions of the guide rail 26 and the melting tank 14. The moving carriage 51 is configured to be movable in a direction approaching and away from the glass melting furnace 11 (melting tank 14). The lifting device 52 includes a support portion 53 that supports the frame 27 from the lower surface side, and a driving device 54 that lifts the support portion 53. As the drive unit 54, for example, a hydraulic jack can be used.

Next, the cutter 24 will be described.

The cutter 24 is formed of a steel material (for example, an SS material) or the like. The cutter 24 is formed in a long plate shape and is disposed substantially vertically in the vicinity of the material input port 13. At the lower end of the cutter 24, a sharp blade portion may also be provided.

As shown in FIGS. 3 to 6, the cutter 24 is configured such that the standby position above the glass material G on the transport surface 23 and the piercing position into the glass material G on the transport surface 23 are formed. Move between.

In the standby position, the lower surface 24a of the cutter 24 is located above the glass material G on the transport surface 23. Therefore, in the standby position, the cutter 24 allows the movement of the glass raw material G on the conveying surface 23. In addition, the standby position is set as appropriate according to the thickness of the glass raw material G on the conveyance surface 23, etc.

In the piercing position, the lower surface 24a of the cutter 24 may be in contact with the conveying surface 23 or may form a slight gap with the conveying surface 23. Further, in the piercing position, the two side faces 24b of the cutter 24 form a slight gap with each of the pair of side plates 32 of the transfer tray 22. Therefore, in the piercing position, the cutter 24 restricts the movement of the glass raw material G on the conveying surface 23.

For example, as shown in FIGS. 5 and 8 , each material supply device 10 includes an actuator 61 , a first link 62 , and a second link 63 as the cutter 24 is moved between the standby position and the piercing position. Movement mechanism 60.

The actuator 61 is for rotating the first link 62. For example, the actuator 61 includes an air cylinder or a hydraulic cylinder or the like including a cylinder 61a and a piston 61b slidable within the cylinder 61a. The base end portion of the cylinder 61a is rotatably coupled to the outer surface of the funnel 21. The front end of the piston 61b is rotatably coupled to one end of the first link 62.

Further, in the present embodiment, the base end portion of the air cylinder 61a is rotatably coupled to the funnel 21, but may be rotatably coupled to one end portion of the first link 62. In this case, the front end of the piston 61b is rotatably coupled to the funnel 21. In either case, the actuator 61 can rotate the first link 62.

The intermediate portion 62a in the longitudinal direction of the first link 62 is stopped by the pin on the outer surface of the funnel 21, and is rotatable around the pin. The other end of the first link 62 is rotatably coupled to one end of the second link 63.

The second link 63 is detachably inserted into the opening portion 18 provided in the dustproof plate 16. The bellows 16 is provided with a bellows-like telescopic cover 19 for preventing the glass material G from scattering from the opening 18. The telescopic cover 19 covers one end of the second link 63 and expands and contracts with the movement of the second link 63. The other end of the second link 63 is coupled to the upper surface of the cutter 24.

The pressure source of the actuator 61 is connected to the control device 28. Under the control of the control device 28, the first link 62 is in one direction (counterclockwise in FIGS. 5 and 8) or the other direction due to the expansion and contraction operation of the actuator 61 (in FIG. 5, FIG. In the case of 8 in the clockwise direction, the second link 63 moves, and the cutter 24 moves in the up direction or the down direction.

Next, the operation of the transfer tray 22 and the cutter 24 will be described with reference to Figs. 3 to 8 . Further, the operations of the first to fourth steps described below are performed under the control of the control device 28, and are repeatedly executed every predetermined period (for example, a period of 1 minute to 10 minutes).

In the first step, as shown in FIGS. 3 to 5, in a state where the transfer tray 22 is stopped at the retracted position, the cutter 24 is raised from the piercing position to the standby position. In a state where the cutter 24 is stopped at the standby position, the lower surface of the cutter 24 is located above the glass material G on the transport surface 23.

In the second step, as shown in FIGS. 5 to 7, the transfer tray 22 is advanced from the retracted position to the advanced position in a state where the cutter 24 is stopped at the standby position. As a result, the conveyance surface 23 advances, and therefore the glass raw material G is conveyed (dropped) from the conveyance surface 23 and the gap 25 of the funnel outlet 21b to the conveyance surface 23. In addition, during the advancement of the transfer tray 22, the glass raw material G on the transfer surface 23 is stably carried on the transfer surface 23 by friction.

Further, in the second step, the front end portion 22a of the transfer tray 22 is pressed by the glass material G floating on the molten glass L in the melting tank 14 to move to the melting tank 14 as the transfer tray 22 advances. Downstream side (clearing tank 15 side). Thereby, the space for inputting the glass raw material G on the transfer tray 22 can be secured.

In the case where the glass raw material G on the transfer tray 22 cannot be secured, the glass raw material G that has been input this time is deposited on the glass raw material G that has been floated on the molten glass L, and the time until melting is prolonged. .

In addition, as described above, the glass raw material G floating on the molten glass L moves to the downstream side of the melting tank 14 (on the side of the clarification tank 15), so that the raw material input port 13 can be moved away from the low temperature, and the glass raw material G is sequentially transferred to a high temperature. On the downstream side, the melting of the glass raw material G is promoted.

The height T (refer to FIG. 7) of the glass raw material G (including the portion submerged under the liquid surface of the molten glass L) moved to the downstream side by the front end portion 22a of the transfer tray 22 is preferably 50 mm to 200 mm, more preferably Good for 70~150 mm, especially for 80~100 mm. When the height T is less than 50 mm, the front end portion 22a of the transfer tray 22 comes into contact with the molten glass L in the melting tank 14. On the other hand, if the height T is higher than 200 mm, it is difficult to effectively melt the glass raw material G.

As a method of measuring the height T, a method in which the rod penetrates the glass raw material G in the vertical direction, and the rod is pulled out from the glass raw material G in the vertical direction, and the unmelted glass raw material G adhered to the rod is measured. section.

In the third step, as shown in FIGS. 7 and 8, the cutter 24 is lowered from the standby position to the piercing position in a state where the transfer tray 22 is stopped at the forward position. In this process, the cutter 24 pierces the glass material G on the conveying surface 23. When the cutter 24 is stopped at the piercing position, the lower surface of the cutter 24 is in contact with the conveying surface 23 or slightly above the conveying surface 23, so that the movement of the glass material G on the conveying surface 23 is restricted.

In the fourth step, as shown in FIGS. 8 and 3, in a state where the cutter 24 is stopped at the piercing position, the transport tray 22 is retracted from the forward position to the backward position. In this case, the cutter 24 that has stopped at the piercing position relatively squeezes at least a part of the glass raw material G closer to the downstream side in the transport direction than the cutter 24 from the transfer surface 23, and drops it to the melting tank 14.

Therefore, even in the case where the fluidity of the glass raw material G on the conveying surface 23 is deteriorated (decreased), the glass raw material G can be accurately stabilized by a fixed amount (for example, 0.3 ton / hour to 1.3 ton / hr. Preferably, it is 0.5 ton / hour - 1.0 ton / hr) and is put into the glass melting furnace 11.

As described above, according to the present embodiment, as the transfer tray 22 moves backward, the cutter 24 extrudes at least a part of the glass raw material G from the transfer surface 23 and drops it into the melting tank 14, so that even the glass material G is poured. When the fluidity is deteriorated (decreased), the glass raw material G can be stably supplied into the glass melting furnace 11 in a fixed amount.

Further, according to the present embodiment, the front end portion 22a of the transfer tray 22 moves the glass raw material G floating on the molten glass L in the melting tank 14 to the downstream side of the melting tank 14, so that the transfer tray 22 is advanced. The space for the glass material G on the transfer tray 22 is put. Further, the glass raw material G floating on the molten glass L in the melting tank 14 can be kept away from the low-temperature raw material inlet 13 to prevent the time until melting.

Further, according to the present embodiment, since the transfer tray 22 is cooled by the refrigerant passage 33, the temperature rise of the glass raw material G on the transfer surface 23 can be suppressed, and deterioration of the glass raw material G (release of hydration water from the glass raw material G) can be suppressed.

The embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications and changes may be made to the above-described embodiments without departing from the scope of the invention.

For example, in the present embodiment, the material supply device 10 is provided in a plurality of (for example, two) horizontally arranged in the glass melting furnace 11, but only one may be provided.

Further, in the second embodiment, in the state where the cutter 24 is stopped at the standby position, the transport tray 22 is advanced from the retracted position to the advanced position, but the present invention is not limited thereto. For example, the cutter 24 may be raised from the piercing position to the standby position, and the transfer tray 22 may be advanced from the retracted position to the advanced position.

Further, in the fourth embodiment, in the state where the cutter 24 is stopped at the piercing position, the transport tray 22 is retracted from the forward position to the retracted position, but the present invention is not limited thereto. For example, the cutter 24 may be lowered from the standby position to the piercing position, and the transfer tray 22 may be retracted from the forward position to the retracted position.

Further, dry air may be blown into the inside of the funnel 21 and further into the raw material storage compartment (not shown) on the upstream side.

Further, the present invention is also applicable to a glass raw material which does not contain a hydrate.

The present invention has been described in detail with reference to the specific embodiments thereof, and it is understood by those skilled in the art that various changes or modifications may be made without departing from the spirit and scope of the invention.

The present application is based on the Japanese Patent Application No. 2009-148058, filed on Jun. 22, 2009, the content of which is hereby incorporated by reference.

Industrial availability

According to the present invention, it is possible to provide a raw material supply method and a raw material supply device capable of stably feeding a glass raw material on a transfer surface to a glass melting furnace at a fixed amount, and a glass plate manufacturing apparatus and a production method.

1. . . Glass raw material

2, 21. . . funnel

3, 22. . . Transport tray

3a, 22a. . . Front end

4, 23. . . Transfer surface

5, 11. . . Glass melting furnace

6, 14. . . Melting tank

7,13. . . Raw material input

10. . . Raw material supply device

12. . . Forming furnace

15. . . Clarification tank

16. . . Dust board

17. . . Floating slot

18. . . Opening

19. . . Telescopic cover

21a. . . Entrance

21b. . . Export

twenty four. . . Cutter

24a. . . lower surface

24b. . . Both sides

25. . . gap

26. . . guide

27. . . frame

28. . . Control device

31. . . Ontology

32. . . Side panel

33. . . Refrigerant road

34. . . wheel

40. . . Advancement

41. . . motor

42. . . Rotating circular plate

43. . . Rod

51. . . Mobile trolley

52. . . Lifting device

53. . . Support

54. . . Drive unit

60. . . Mobile agency

61. . . Actuator

61a. . . cylinder

61b. . . piston

62. . . First link

62a. . . Middle part

63. . . Second link

L. . . Molten glass

G. . . Glass raw material

θ. . . Tilt angle

T. . . height

Figure 1 is a schematic view showing a prior art example of a raw material supply device;

Figure 2 is a block diagram showing the configuration of a manufacturing apparatus for a glass sheet according to an embodiment of the present invention;

3 is a cross-sectional view for explaining the configuration and operation of the material supply device 10, and is a view showing a state in which the transfer tray 22 is located at the upstream end in the transport direction and the cutter 24 is at the piercing position;

Figure 4 is a cross-sectional view for explaining the action of the cutter 24, and is a cross-sectional view taken along line A-A' of Figure 3;

5 is a cross-sectional view for explaining the configuration and operation of the material supply device 10, and is a view showing a state in which the transfer tray 22 is located at the upstream end in the transport direction and the cutter 24 is at the standby position;

Figure 6 is a cross-sectional view for explaining the action of the cutter 24, and is a cross-sectional view taken along line BB' of Figure 5;

7 is a cross-sectional view for explaining the configuration and operation of the material supply device 10, and is a view showing a state in which the transfer tray 22 is located at the downstream end in the transport direction and the cutter 24 is at the standby position;

8 is a cross-sectional view for explaining the configuration and operation of the material supply device 10, and is a view showing a state in which the transfer tray 22 is located at the downstream end in the transport direction and the cutter 24 is at the piercing position.

10. . . Raw material supply device

11. . . Glass melting furnace

13. . . Raw material input

14. . . Melting tank

16. . . Dust board

twenty one. . . funnel

21a. . . Entrance

21b. . . Export

twenty two. . . Transport tray

22a. . . Front end

twenty three. . . Transfer surface

twenty four. . . Cutter

25. . . gap

26. . . guide

27. . . frame

31. . . Ontology

32. . . Side panel

33. . . Refrigerant road

34. . . wheel

51. . . Mobile trolley

52. . . Lifting device

53. . . Support

54. . . Drive unit

G. . . Glass raw material

L. . . Molten glass

θ. . . Tilt angle

Claims (12)

A raw material supply method in which a glass raw material is dropped from a funnel into a transfer tray, and the transfer tray is moved back and forth, and the glass raw material on the transfer surface of the transfer tray is introduced into a melting tank of the glass melting furnace, and the conveyance is performed. When the disk advances from the upstream end in the conveying direction toward the downstream end in the conveying direction, the cutter that can pierce the glass material on the conveying surface moves to a standby position above the glass material on the conveying surface, and the conveying tray is self-contained. When the downstream end of the conveyance direction retreats toward the upstream end in the conveyance direction, the cutter moves to a position where the glass material is pierced at the conveyance surface, and the cutter is stopped at the position where the conveyance tray is retracted and the piercing position is stopped. At least a part of the glass raw material closer to the downstream side in the transport direction than the cutter is relatively extruded from the transfer tray and is introduced into the melting tank. The raw material supply method according to claim 1, wherein when the transfer tray advances from the upstream end in the transport direction toward the downstream end in the transport direction, the front end of the transport tray is caused by the glass material floating on the molten glass in the melting tank toward The downstream side of the melting tank moves. The raw material supply method of claim 1, wherein the glass raw material contains a hydrate. The raw material supply method of claim 2, wherein the glass raw material contains a hydrate. The raw material supply method of claim 3 or 4, wherein the hydrate is boric acid (H ₃ BO ₃ ). The raw material supply method according to any one of claims 1 to 4, wherein The tray is cooled. The raw material supply method of claim 5, wherein the transfer tray is cooled. A raw material supply device includes a transfer tray that transports a glass raw material dropped from a funnel, and the transfer tray is reciprocated to feed the glass raw material on the transfer surface of the transfer tray to a melting tank of the glass melting furnace, and includes a cutter that can penetrate the glass material on the conveying surface; and when the conveying tray advances from the upstream end in the conveying direction toward the downstream end in the conveying direction, the cutter moves to the glass material on the conveying surface When the transfer tray is retracted toward the upstream end in the transport direction from the downstream end of the transport tray in the transport direction, the cutter moves to a position where the glass material is inserted into the transport surface, and the transfer tray is retracted. At least the part of the glass material which is closer to the downstream side in the conveyance direction than the cutter is relatively extruded from the transfer tray and is introduced into the melting tank. The material supply device according to claim 8, wherein when the transfer tray advances from the upstream end in the transport direction toward the downstream end in the transport direction, the front end of the transport tray is caused by the glass material floating on the molten glass in the molten bath toward The downstream side of the melting tank moves. The material supply device of claim 8 or 9, further comprising a cooling mechanism for cooling the transfer tray. A glass plate manufacturing apparatus comprising: the raw material supply device according to any one of claims 8 to 10; a glass melting furnace which melts the glass raw material supplied from the raw material supply device; and a forming furnace, its The molten glass melted in the glass melting furnace is formed into a sheet glass. A method of producing a glass sheet using the manufacturing apparatus of the glass sheet of claim 11 to manufacture a glass sheet.