CN203173971U - Glass plate manufacturing device - Google Patents

Abstract

A glass plate manufacturing device provided by the utility model is the glass plate manufacturing device which enables molten glass (90) overflowing from a shaped body to flow along the two side surfaces of the shaped body (10) and then converge close to the lower end part of the shaped body for manufacturing a glass plate (91), and can adjust the cooling speed of the glass plate. The glass plate manufacturing device comprises a plurality of cooling adjusting plates and temperature control units, wherein the plurality of cooling adjusting plates are configured in parallel at the positions lower than the converging point of the molten glass in the flowing direction of the molten glass, and are used for adjusting the cooling speed of the glass plate; and the temperature control units are arranged corresponding to the cooling adjusting plates, and are used for controlling the temperature of the cooling adjusting plates.

Description

Glass plate manufacturing equipment

technical field

The utility model relates to a glass plate manufacturing device. the

Background technique

Conventionally, a fusion method has been used as one of the methods of manufacturing a glass plate. In the melting method, molten glass flowing into a molded body is overflowed from the molded body to produce a glass plate. The molten glass overflowing from the forming body flows down along the forming body, joins at the lower end of the forming body, and then detaches from the forming body to become a glass plate. The glass sheet is cooled by the environment in the furnace, changing from the viscous region through the viscoelastic region to the elastic region. Here, in order to prevent the range of the glass plate that should be cooled uniformly in the viscoelastic region of the glass from being unevenly cooled by convection generated in the furnace, for example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2-225326 ) As shown, a technique of providing plate-shaped members on both sides of a glass plate has been proposed. the

Utility model content

[The problem to be solved by the utility model] 

With the increase in demand for glass substrates in recent years, it is necessary to increase the throughput of glass plates. However, in the case of employing the conventional technique, it is difficult to sufficiently control the cooling rate of the glass sheet, and thus a sufficient improvement in throughput cannot be expected. the

Therefore, an object of this invention is to provide the glass plate manufacturing apparatus which can adjust the cooling rate of a glass plate. the

[Technical means to solve the problem] 

The glass plate manufacturing device of the present invention is to make the molten glass overflowing from the forming body flow down along the both sides of the forming body, and then merge near the lower end of the forming body to manufacture glass plates. It is equipped with a plurality of cooling adjustment plates, and temperature control unit. A plurality of cooling adjustment plates are arranged in parallel along the flow direction of the molten glass below the confluence point of the molten glass, and adjust the cooling rate of the glass plate. The temperature control unit is provided corresponding to each cooling adjustment plate, and controls the temperature of each cooling adjustment plate. the

The cooling adjustment plates arranged side by side in the flow direction of the molten glass are respectively temperature-controlled by the temperature control unit corresponding to each cooling adjustment plate. The cooling adjustment plate is controlled by the temperature control unit so as to maintain temperature uniformity in the width direction, thereby adjusting the cooling rate of the glass plate. the

Thereby, temperature control of a glass plate can be performed efficiently. the

Also, preferably, a plurality of cooling adjustment plates are arranged below the upper and lower environment partition members. The upper and lower environment partition members are arranged near the confluence point of molten glass, and separate the upper side environment and the lower side environment of the confluence point. the

In the space where the heat of the molded body is blocked by the upper and lower environmental partition members, the cooling adjustment plate controls the cooling rate of the molten glass, so the influence of the temperature control unit on cooling is difficult to affect the molded body. In addition, temperature control of the glass sheet in the viscoelastic region can be efficiently performed without changing the optimum glass viscosity of the molten glass flowing along the molded body. the

Furthermore, it is preferable that each cooling adjustment plate extends in the horizontal direction intersecting with the flow direction of molten glass, and it is preferable that a temperature control means contains a pipe. A fluid that cools or heats the entirety of each cooling adjustment plate flows through the tubes. the

The entirety of the cooling adjustment plates facing the glass plate can be cooled or heated from the back side of the glass plate facing surface by the fluid flowing in the tube. the

Furthermore, preferably, the pipe includes a supervisor and a sub pipe. The main pipe is arranged along the length direction of the cooling adjustment plate. The auxiliary pipes are respectively connected to both sides of the main pipe. The secondary pipe conveys gas as a heat exchange medium to the main pipe. Also, preferably, the main pipe has a plurality of outlets. The plurality of outlets blow the gas sent from the sub-pipe to the outside of the main pipe and blow it to the cooling adjustment plate. the

The temperature control of the cooling adjustment plate can be efficiently performed by blowing gas from a plurality of outlets with respect to the cooling adjustment plate. the

Furthermore, it is preferable that the plurality of outlets each have a predetermined size in accordance with the distance from the side portion of the main pipe so that the amount of gas blown out from each outlet becomes uniform. the

By adjusting the size and position of the outlet for blowing gas toward the cooling adjustment plate, even if the pressure of the gas supplied to the tube is changed to some extent, the width direction of the entire cooling adjustment plate extending in the first direction can be adjusted The amount of cooling on the board remains roughly constant. By keeping the amount of cooling in the width direction of the entire cooling adjustment plate substantially constant, it is possible to manufacture a preferable glass plate with high flatness. the

Also, preferably, the cooling adjustment plate is a channel steel, and the main part of the channel steel faces the glass plate. Thereby, the intensity|strength of a cooling adjustment plate can be improved. the

Furthermore, it is preferable that the manufacturing apparatus of a glass plate further includes a 1st surrounding member, a 2nd surrounding member, and a heat insulating member. The first surrounding member surrounds the first pipe to form a first space. The so-called first pipe refers to a pipe through which a fluid that cools or heats the first cooling adjustment plate flows, and the so-called first space refers to a space for adjusting the cooling rate of the first cooling adjustment plate. The second surrounding member surrounds the second pipe to form a second space. The second pipe refers to a pipe through which a fluid that cools or heats the second cooling adjustment plate adjacent to the first cooling adjustment plate flows. The second space refers to a space for adjusting the cooling rate of the second cooling adjustment plate. The heat insulating member is arranged between the first space and the second space, and blocks the transfer of heat between the first space and the second space. the

Since the heat transfer between the first space and the second space is blocked by the heat insulating member, it is possible to reduce the influence on the temperature of the second cooling adjustment plate when controlling the temperature of the first cooling adjustment plate. the

Moreover, it is preferable that the manufacturing apparatus of a glass plate is further equipped with the gas control means. The gas control unit controls the flow of gas blown to the cooling adjustment plate. Thereby, the influence of the gas blown from one outlet to the cooling adjustment plate on the gas blown from the other outlet can be reduced. the

[Effect of utility model]

With the glass plate manufacturing device of the present invention, the temperature control of the glass plate can be effectively performed. the

Description of drawings

Fig. 1 is a schematic configuration diagram of a glass plate manufacturing device;

Figure 2 is a schematic composition diagram (sectional view) of the forming device;

Figure 3 is a schematic composition diagram (side view) of the forming device;

Figure 4 is a diagram representing a cooling adjustment plate;

Figure 5 is a diagram showing the space formed by the cooling adjustment plate and the surrounding member;

Figure 6 is a diagram representing the flow of gas blown out from the main pipe and the flow of the blown gas;

Figure 7 is a diagram representing the composition of the tube;

Fig. 8 is a diagram showing a control device and various mechanisms connected to the control device. the

Detailed ways

(1) Overall composition

In FIG. 1, the schematic structural diagram of the glass plate manufacturing apparatus 100 which concerns on the 1st Example of this invention is shown. The glass plate manufacturing apparatus 100 is an apparatus that manufactures the glass plate 91 by a melting method. The glass plate 91 manufactured by the glass plate manufacturing apparatus 100 is used for the glass substrate of flat panel displays, such as a liquid crystal display and a plasma display. Moreover, in this Example, the glass plate manufacturing apparatus 100 manufactures the glass plate 91 used for the glass substrate of G5 size. The glass plate manufacturing apparatus 100 continuously manufactures the strip-shaped glass plate 91. the

The glass plate manufacturing apparatus 100 mainly includes a melting tank 200 , a clarification tank 300 , and a forming device 101 . In the melting tank 200, the raw material of glass is melt|dissolved, and a molten glass is produced|generated. Thereafter, the molten glass is transferred into the clarification tank 300 . In the clarification tank 300, the air bubbles in the molten glass are removed. Thereafter, the molten glass is transferred to the forming device 101 . the

In FIG. 2 and FIG. 3, the schematic structure of the molding apparatus 101 is shown. FIG. 2 is a cross-sectional view of the molding device 101 . FIG. 3 is a side view of the forming device 101 . As shown in Fig. 2, Fig. 3 and Fig. 6, the forming device 101 is mainly composed of a forming body 10, upper and lower environment partition members 20, 20, a plurality of cooling rolls 30, cooling adjustment units 40a-40f, surrounding members 70a, 70b, 70c, A plurality of heat insulating members 71, a plurality of pull-down rolls 60, and a control device 80 are configured. Hereinafter, each configuration included in the molding apparatus 101 will be described in detail. the

(2) Detailed composition

(2-1) Formed body

The molded body 10 molds the molten glass 90 into plate-shaped glass (glass plate 91 ) by overflowing the molten glass 90 . The molded body 10 has an inflow port 12 (see FIG. 3 ). Molten glass 90 passing through melting tank 200 and clarification tank 300 flows in from inflow port 12 . As shown in FIG. 2 , the molded body 10 has a substantially pentagonal cross-sectional shape. The substantially pentagonal front end corresponds to the lower end of the molded body 10 . In the molded body, grooves 11 are formed. The groove 11 extends in the longitudinal direction of the molded body 10 . Specifically, the groove 11 extends from a first end where the inlet 12 is provided to a second end opposite to the first end. The groove 11 is formed such that it is deepest near the inflow port 12 and gradually becomes shallower as it gets closer to the second end. The molten glass 90 overflowing from the forming body 10 flows down along both sides of the forming body 10 and joins at the lower end of the forming body 10 . the

(2-2) Upper and lower environment separation components

The upper and lower environment partition members 20 and 20 are arranged near the confluence point of the molten glass 90 . the

Moreover, as shown in FIG. 2 , the upper and lower environment partition members 20 , 20 are arranged on both sides in the thickness direction of the glass plate 91 . The upper and lower environmental partition members 20, 20 are heat insulating materials. That is, the upper and lower environment partition members 20 , 20 block heat transfer from the upper side to the lower side of the upper and lower environment partition members 20 , 20 by partitioning the upper environment and the lower environment at the confluence point of the molten glass 90 . the

(2-3) cooling roll

The plurality of cooling rolls 30 are provided to cool the glass in contact with the molten glass 90 (glass plate 91 ) that joins the lower end of the molded body 10 and forms a plate shape. the

(2-4) Cooling adjustment unit

The cooling adjustment units 40 a to 40 f are means for adjusting the cooling rate of the glass plate 91 . In this embodiment, six cooling adjustment units 40a to 40f are provided. As shown in FIGS. 2 and 3 , the cooling adjustment units 40 a to 40 f are disposed below the upper and lower environment partition members 20 , 20 . Moreover, the cooling adjustment units 40a-40f are arrange|positioned in parallel along the flow-down direction of the glass plate 91. As shown in FIG. A plurality of cooling adjustment units 40a to 40f are arranged in parallel without gaps. Each cooling adjustment unit 40a-40f has the structure which can be controlled independently. In the present embodiment, the cooling adjustment units 40 a to 40 f are controlled so that the glass plate 91 can be cooled stepwise along the flow-down direction of the glass plate 91 . the

The cooling adjustment unit 40 a includes a cooling adjustment plate 41 a and a temperature control unit 50 a (see FIG. 6 ) that controls the temperature of the cooling adjustment plate 41 a. Similarly, the cooling adjustment unit 40b includes a cooling adjustment plate 41b and a temperature control unit that controls the temperature of the cooling adjustment plate 41b, and the cooling adjustment unit 40c includes a cooling adjustment plate 41c and a cooling adjustment plate 41c. Temperature control unit for temperature control. The same applies to the other cooling adjustment units 40d-40f. As for the temperature control unit that controls the temperature of the cooling adjustment plates 41b and 41c, only the pipes 51b and 51c included in the temperature control unit are shown in the figure (see FIG. 5 ). In addition, the configuration of all cooling adjustment units 40a-40f is the same. Therefore, the cooling adjustment plate 41 a and the temperature control unit 50 a included in the cooling adjustment unit 40 a will be described below by taking the cooling adjustment unit 40 a as an example. The cooling adjustment unit 40a is arrange|positioned at the most upstream with respect to the flow-down direction of the glass plate 91 among six cooling adjustment units 40a-40f. the

(2-4-1) Cooling adjustment plate

The cooling adjustment plate 41 a is arranged near the surface of the glass plate 91 and adjusts the cooling rate of the glass plate 91 . The cooling adjustment plate 41 a extends in a direction (that is, a horizontal direction) intersecting the flow direction of the molten glass 90 (glass plate 91 ). The length in the longitudinal direction of the cooling adjustment plate 41 a is slightly shorter than the length in the width direction of the glass plate 91 . In this embodiment, the length in the longitudinal direction of the cooling adjustment plate 41 a is 1,500 mm. the

The cooling adjustment plate 41a is a bent metal member. Preferably, the metal member is a member having heat resistance of 600° C. or higher in the air. Also, preferably, the metal member has a thermal conductivity of at least 30 W/m·K or higher. As described above, by using a metal member with high thermal conductivity, the temperature difference between the surface and the back surface of the cooling adjustment plate 41a is reduced, and the difference between the thermal expansion of the surface and the back surface is suppressed, so that the warping of the cooling adjustment plate 41a is suppressed. inhibition. Moreover, since the thermal conductivity is high, when the temperature difference of each part of the cooling adjustment plate 41a arises, this temperature difference is also alleviated rapidly. Furthermore, since a metal member with high thermal conductivity is used as the cooling adjustment plate 41a, the cooling efficiency of the glass plate 91 is also high. The emissivity characteristic of the metal member is preferably 0.85 or more in the operating temperature range in order to secure a high heat exchange rate. In this embodiment, pure nickel (thermal conductivity: 90.7 W/m·K) was used as the metal member. the

As shown in FIG. 4, the cooling adjustment plate 41a is comprised by the bent part 42a, and the main part 43a. The bent portion 42a is located above and below the metal member extending in the horizontal direction, and is a bent portion of the metal member. The part other than the bent part 42a among the metallic members extending in the horizontal direction is the main part 43a. The main portion 43 a has a flat surface (facing surface) facing the glass plate 91 . Specifically, the cooling adjustment plate 41a is a channel steel (channel steel). the

Here, the dimension h of the main portion 43a can be appropriately changed in order to obtain a desired cooling rate. For example, it is changed according to the flow rate per unit width of glass. Moreover, it is preferable that the main part 43a has thickness t more than predetermined value. Specifically, the thickness t is preferably about 4 mm or more. From the viewpoint of heat capacity, the thickness t is more preferably 6 mm or more, further preferably 8 mm or more. When a channel steel having a thickness t of this level is used, the heat capacity of the cooling adjustment plate 41 a is sufficiently increased, the temperature difference becomes smaller, and the uniformity of the temperature distribution of the glass plate 91 is further improved. Moreover, the dimension w of the bent part 42a is about 20 mm - about 50 mm. Furthermore, the cooling adjustment plate 41 a is screwed to the adjacent cooling adjustment plate 41 b (see FIG. 5 ). Specifically, the bent portion 42a of the cooling adjustment plate 41a and the bent portion 42b of the cooling adjustment plate 41b are screwed and connected. Therefore, the bent portion 42 a basically has only to have a size that can be screwed. However, the bent portion 42a also helps to increase the second moment of area of the cooling adjustment plate 41a, so it is not good if the bent portion 42a is too short. the

(2-4-2) Temperature control unit

The temperature control unit 50a adjusts the temperature of the cooling adjustment plate 41a. Specifically, the temperature control unit 50 a adjusts the temperature of the corresponding cooling adjustment plate 41 a so as to cool the glass plate 91 stepwise along the flow-down direction of the glass plate 91 . the

The temperature control unit 50a is mainly composed of a tube 51a, a thermistor 56 (see FIG. 7 ), and a gas control unit 57a. the

a) Tube

The pipe 51a flows a fluid for cooling or heating the entire cooling adjustment plate 41a. Here, the fluid flowing through the tube refers to gas (for example, air or an inert gas such as nitrogen). The pipe 51a includes a main pipe 52a and sub pipes 531a and 532a. the

As shown in FIG. 6, the main pipe 52a is arrange|positioned along the longitudinal direction of the cooling adjustment plate 41a. A plurality of outlets 521 are evenly formed on the main pipe 52a. Specifically, the plurality of outlets 521 are formed at symmetrical positions with respect to the centerline C of the main pipe 52a. Moreover, as shown in FIG. 5 , the air outlet 521 is provided at a position facing the main part 43a of the cooling adjustment plate 41a. That is, the gas blown out from the blower port 521 is blown to the main part 43a of the cooling adjustment plate 41a. More specifically, the gas blown out from the outlet 521 is blown to the rear side of the facing surface. The outlets 521 each have a predetermined size depending on the distance from the side of the main pipe 52a. That is, the size of the outlet 521 is also symmetrical with respect to the center line C of the main pipe 52a. Here, the side part of the main pipe 52a includes a first side part and a second side part. The first side portion and the second side portion are arranged at symmetrical positions with respect to the center line C in the longitudinal direction of the main pipe 52a. In addition, the predetermined size means a size at which the amount of gas blown out from each blower port 521 becomes uniform. Specifically, the size of the outlet 521 becomes larger as the position where the outlet 521 is formed is farther from the side portion (see FIG. 7 ). the

The sub-pipes 531a and 532a are pipes that send gas as a heat exchange medium to the main pipe 52a. The sub-pipes 531a and 532a are respectively connected to both sides (the first side and the second side) of the main pipe 52a. Specifically, the first sub-pipe 531a is connected to the first side portion of the main pipe 52a, and the second sub-pipe 532a is connected to the second side portion of the main pipe 52a. As shown in FIG. 6 , the first sub-pipe 531 a and the second sub-pipe 532 a are connected to the gas supply unit 54 . The amount of gas sent from the gas supply unit 54 to the first sub-pipe 531 a and the second sub-pipe 532 a is adjusted by the gas supply valve 55 . the

b) Thermistor

The thermistor 56 measures the temperature of the cooling adjustment plate 41a. A plurality of thermistors 56 are attached in the longitudinal direction of the cooling adjustment plate 41a. The temperature of the cooling adjustment plate 41a measured by the thermistor 56 is sent to the control device 80 which will be described later. the

c) Gas control unit

The gas control unit 57a is a unit that controls the flow of the gas blown to the cooling adjustment plate 41a. Specifically, the gas control unit 57a controls so that the gas blown to the cooling adjustment plate 41a does not flow in the longitudinal direction of the cooling adjustment plate 41a. More specifically, as shown in FIG. 6, the gas control unit 57a controls the flow of the gas in the following manner: the gas blown out from the outlet 521 of the main pipe 52a is blown to the cooling adjustment plate 41a and along the direction of the cooling adjustment plate 41a. Before flowing in the longitudinal direction, it flows in the direction d2 directly opposite to the blowing direction d1. The gas control unit 57a is configured in such a manner that the gas blown out from one blowout port 521 does not interfere with the gas blown out from the other blowout port 521 by controlling the flow of the gas blown out from the blowout port 521 in the direction d2. The flow direction d1 has an influence. The gas flowing in direction d2 is released outside the furnace. the

(2-5) Surrounding components

The surrounding members 70a, 70b, and 70c are members that form the spaces 72a, 72b, and 72c for controlling the temperature of the cooling adjustment plates 41a, 41b, and 41c. The surrounding members 70a, 70b, 70c are connected to the bent portions 42a, 42b, 42c of the cooling adjustment plates 41a, 41b, 41c. Cooling adjustment plates 41a, 41b, 41c and surrounding members 70a, 70b, 70c connected to cooling adjustment plates 41a, 41b, 41c form spaces 72a, 72b, 72c surrounding pipes 51a, 51b, 51c. the

Specifically, as shown in FIG. 5 , first surrounding members 70a, 70a are connected to the first cooling adjustment plate 41a. The first space 72a surrounding the first pipe 51a is formed by the first cooling adjustment plate 41a and the first surrounding members 70a, 70a. The temperature of the first cooling adjustment plate 41a is adjusted by the first space 72a. the

Moreover, the 2nd surrounding member 70b, 70b is connected to the 2nd cooling adjustment plate 41b. The second space 72b surrounding the second pipe 51b is formed by the second cooling adjustment plate 41b and the second surrounding members 70b, 70b. The temperature of the second cooling adjustment plate 41b is adjusted by the second space 72b. the

Furthermore, a third surrounding member 70c is connected to the third cooling adjustment plate 41c, and a third space 72c surrounding the third pipe 51c is formed by the third cooling adjusting plate 41c and the third surrounding member 70c. The temperature of the third cooling adjustment plate 41c is adjusted by the third space 72c. the

Furthermore, the functions of the surrounding members 70a, 70b, and 70c can also be realized by a plurality of heat insulating members 71 described below, so the surrounding members 70a, 70b, and 70c can also be heat insulating plates, and the following multiple heat insulating members can also be made The thermal member 71 also functions as a surrounding member. the

(2-6) Thermal insulation components

The some heat insulation member 71 is a member which blocks the movement of the heat of adjacent space 72a, 72b, 72c. Specifically, the some heat insulation member 71 is arrange|positioned between surrounding member 70a, 70b, 70c which forms adjacent space 72a, 72b, 72c. More specifically, as shown in FIG. 5, the heat insulating member 71 is disposed between a first surrounding member 70a forming a first space 72a and a second surrounding member 70b forming a second space 72b adjacent to the first space 72a. , blocking the transfer of heat between the first space 72a and the second space 72b. Moreover, the heat insulating member 71 is arranged between the second surrounding member 70b forming the second space 72b and the third surrounding member 70c forming the third space 72c adjacent to the second space 72b, and blocks the second space 72b from the second space 72b. 3 Movement of heat between spaces 72c. the

(2-7) pull down roller

The plurality of pull-down rolls 60 are arranged downstream of the flow direction of the glass sheet 91 with respect to the cooling adjustment units 40a to 40f, and pull the glass sheet 91 downward. the

The plurality of pull-down rolls 60 are arranged on both sides in the thickness direction of the glass plate 91 (see FIG. 2 ) and on both sides in the width direction of the glass plate 91 (see FIG. 3 ). The plurality of pull-down rollers 60 are driven by a motor (not shown). In addition, the plurality of pull-down rolls 60 rotate inwardly with respect to the glass plate 91 . Thereby, the two pairs of pull-down rollers 60 pull down the glass plate 91 downward. the

(2-8) Control device

The control device 80 is composed of a CPU, RAM, ROM, hard disk, and the like. As shown in FIG. 8, the control device 80 is connected to the plurality of cooling rolls 30, the plurality of pull-down rolls 60, the gas control unit 57a, the gas supply unit 54, the gas supply valve 55, the thermistor 56, and the like. the

The control device 80 controls the drive units of the cooling roll 30 , the pull-down roll 60 , the gas control unit 57 a , and the gas supply unit 54 . In addition, the control device 80 controls the opening and closing or the opening degree of the gas supply valve 55 . Moreover, the control device 80 acquires and stores the temperature measured by the thermistor 56 . Furthermore, the control device 80 adjusts the supply amount of the gas based on the temperature measured by the thermistor 56 . the

(3) Overall action

The molten glass 90 overflowing from the forming body 10 flows down the both sides of the forming body 10 and joins at the lower end of the forming body 10 . The molten glass 90 which merged at the lower end part of the molded object 10 becomes a plate shape (glass plate 91) after that, and flows down further. The both ends of the glass plate 91 are cooled by pinching both ends in the width direction by the cooling roll 30 . Moreover, the cooling rate is adjusted stepwise along the flow-down direction by a plurality of cooling adjustment units 40a to 40f at portions other than both ends in the width direction of the glass plate 91 . Specifically, the temperature in the width direction of the glass plate 91 is controlled to be constant by the first cooling adjustment plate 41a and the first temperature control unit 50a corresponding to the first cooling adjustment plate 41a. Thereafter, the glass plate 91 is further cooled by the second cooling adjustment plate 41b arranged in parallel with the first cooling adjustment plate 41a and the second temperature control unit 50b corresponding to the second cooling adjustment plate 41b. At this time, the second temperature control unit 50b also controls the temperature in the longitudinal direction of the second cooling adjustment plate 41b to be constant and the temperature in the width direction of the glass plate 91 to be uniform. As mentioned above, several cooling adjustment units 40a-40f cool the glass plate 91 stepwise along the flow-down direction of the glass plate 91, making the temperature of the width direction of the glass plate 91 uniform. Thereafter, the glass plate 91 is further pulled down by the pull-down roller 60, and then cut in units of predetermined lengths. the

(4) Features

(4-1)

In the glass plate manufacturing apparatus 100 of the said Example, in the shaping|molding apparatus 101, several cooling adjustment units 40a-40f are arrange|positioned in parallel along the flow-down direction of the glass plate 91 (molten glass 90). The temperature of the cooling adjustment plates 41a, 41b, 41c included in the cooling adjustment units 40a-40f is adjusted by the corresponding temperature control unit 50a. That is, in the glass plate manufacturing apparatus 100, the freedom degree of the control of the cooling rate of the up-down direction (longitudinal direction) of the glass plate 91 improves. the

In the conventional glass sheet manufacturing apparatus, by arranging the plate-shaped member near the glass sheet, it is possible to prevent the cooling of the glass sheet from becoming uneven due to convection generated in the furnace, but it does not have the ability to pull down the glass sheet. A mechanism for adjusting the temperature of a plate-like member in any direction. With the increase in demand for glass substrates, it is expected to control the cooling rate of glass sheets and increase the throughput of glass sheets. However, in the conventional glass sheet manufacturing equipment, in order to ensure the required cooling amount due to the increase in throughput, it is impossible to realize the whole without equipment. The increase in the size of the glass plate in the downward pull direction can fully improve the throughput. the

In the glass plate manufacturing apparatus 100 of the said Example, in the shaping|molding apparatus 101, in order to adjust the cooling rate of the glass plate 91, the cooling adjustment means 40a-40f are used. In the cooling adjustment units 40a-40f, respectively include the cooling adjustment plates 41a, 41b, 41c and the temperature control unit 50a, and the temperature of the cooling adjustment plates 41a, 41b, 41c is adjusted by the temperature control unit 50a, so it can be adjusted according to the The cooling rate of the glass plate 91 needs to be adjusted. Thereby, since the cooling rate can be efficiently controlled in a limited space without enlarging the whole apparatus, the throughput of the glass plate 91 can be improved. the

(4-2)

Moreover, in the glass plate manufacturing apparatus 100 of the said Example, the several cooling adjustment units 40a-40f are used for the forming apparatus 101. As shown in FIG. A cooling adjustment plate 41 a included in a cooling adjustment unit 40 a extends in the width direction of the glass plate 91 . And the temperature control means 50a performs the overall temperature control of the cooling adjustment plate 41a. Therefore, the temperature in the width direction of the glass plate 91 can be maintained uniformly, and the temperature of the glass plate 91 can be lowered stepwise along the flow direction of the glass plate 91 . Thereby, the flatness quality within the effective width of the glass plate 91 can be maintained favorably. the

(4-3)

In the glass plate manufacturing apparatus 100 of the above-mentioned embodiment, the several cooling adjustment units 40a-40f are provided under the up-and-down environment partition members 20 and 20. As shown in FIG. Below the upper and lower environment partition members 20 and 20 is a space where the heat of the molded body 10 is blocked by the upper and lower environment partition members 20 and 20 . The cooling adjustment means 40a-40f control the cooling rate of the molten glass 90 in the space where the heat of the molded object 10 is interrupted. Thereby, the influence to the temperature of the molten glass which flows on a molded object is reduced, and temperature control can be performed efficiently. the

(4-4)

In the said embodiment, the main pipe 52a which blows gas to the cooling adjustment plates 41a, 41b, 41c extends in the horizontal direction similarly to the cooling adjustment plates 41a, 41b, 41c. the

In addition, the main pipe 52a has outlets facing the cooling adjustment plates 41a, 41b, and 41c and provided at predetermined intervals. The size of the outlet is set in accordance with the position from the side to which the sub-pipe is connected. The temperature of the cooling adjustment plates 41a, 41b, and 41c is adjusted by the gas blown from the blowing port. Thereby, temperature control can be performed so that the temperature in the width direction of the cooling adjustment plates 41a, 41b, 41c may become nearly uniform. the

(4-5)

Moreover, in the above-mentioned embodiment, the blower outlet 521 which the main pipe 52a has has a different size with respect to the center line C in the width direction as an axis of symmetry according to the distance from the side. Cooling gas of equal pressure is supplied from both sides through the circuit piping, so the longer the distance from the side (where the gas is supplied from the secondary pipe to the main pipe) to the outlet 521, the greater the pressure loss. That is, the farther the outlet 521 is from the side, the lower the pressure of the gas blown out from the outlet 521 , making it difficult to secure a sufficient flow rate for all the outlets 521 . Therefore, in the above-described embodiment, the size (opening area) of each outlet is changed according to the distance from the side portion. Specifically, the opening area of the air outlet 521 increases the farther away from the side portion. In addition, the air outlet 521 is formed at a symmetrical position with respect to the center line C. As shown in FIG. As a result, the gas is blown out from the main pipe 52a so that the temperature in the longitudinal direction of the cooling adjustment plate 41a becomes uniform. Thereby, each cooling adjustment plate 41a, 41b, 41c maintains a substantially uniform temperature in the width direction, and can manufacture the glass plate 91 of preferable flatness. the

(4-6)

Furthermore, in the above-described embodiment, the cooling adjustment plates 41a, 41b, and 41c are channel steel. That is, the cooling adjustment plate 41a has a bent part 42a and a main part 43a, the bent part 42a is a part bent up and down of the metal member extending in the horizontal direction, and the main part 43a is a part of the metal member extending in the horizontal direction. The portion other than the bent portion 42a is a flat surface facing the glass plate 91 . Therefore, by adopting this bent structure, the cooling adjustment plates 41a and 41b increase the second moment of area with respect to the bending stress in the planar direction, thereby suppressing deformation due to the temperature difference between the front and back of the main portion 43a. That is, the bending of the cooling adjustment plates 41a and 41b can be suppressed, thereby preventing the distance between the glass sheet (glass ribbon) 91 and the cooling adjustment plates 41a and 41b from greatly changing depending on the location in the pull-down direction of the glass sheet. the

Thereby, deterioration of the flatness in the cooling process of a glass ribbon can be suppressed. the

Also, in the above-described embodiment, the main portion 43a of the cooling adjustment plate 41a has a thickness t of about 4 mm or more. Thus, when temperature unevenness occurs in the width direction of the surface opposite to the glass-facing side of the cooling adjustment plate 41a, the temperature difference on the glass-facing surface is alleviated by heat conduction inside the cooling adjustment plate 41a, thereby The influence on the temperature control of the glass plate 91 can be suppressed. Also, when the glass plate 91 flowing into between the cooling and adjusting plates already has temperature unevenness in the width direction, if the in-plane temperature uniformity of the cooling and adjusting plates is high, the glass plate will be damaged due to the heat exchange with the adjusting plates. The temperature unevenness that 91 has is alleviated. the

(4-7)

In addition, in the above-mentioned embodiment, the structure is such that one cooling adjustment unit 40a hardly affects the adjacent cooling adjustment unit 40b by using the surrounding members 70a, 70b, 70c and a plurality of heat insulating members 71 . Specifically, the surrounding member 70a connected to the cooling adjustment plate (first cooling adjustment plate) 41a of the first cooling adjustment unit 40a, and the cooling adjustment plate (second cooling adjustment plate) 41b of the second cooling adjustment unit 40b Between the enclosing members 70b connected above, the heat insulating member 71 is disposed, so the first space 72a used to adjust the temperature of the first cooling adjustment plate 41a is used to adjust the temperature of the second cooling adjustment plate 41b. Heat transfer between the adjusted second spaces 72b is blocked. the

Thereby, the influence of one cooling adjustment unit 40a on the adjacent cooling adjustment unit 40b can be reduced. the

(4-8)

Furthermore, in the above-mentioned embodiment, the flow of the gas blown to the cooling adjustment plate 41a is controlled by the gas control unit 57a. The gas control unit 57a flows in the direction d2 exactly opposite to the blowing direction d1 of the gas from the pipe to the cooling adjustment plate 41a. Thereby, the influence of the gas blown out from one outlet 521 on the flow direction d1 of the gas blown out from the other outlet 521 can be reduced. the

(5) Variations

(5-1) Modification A

In the above-mentioned embodiment, an example of the case where the glass plate 91 is produced by the fusion method has been described, but the configuration using a plurality of cooling adjustment units 40a to 40f can also be used when the glass plate 91 is produced by the orifice downdraw method. use. the

(5-2) Modification B

In the above embodiments, pure nickel is used as the material with high thermal conductivity, but other materials can also be used as the material with high thermal conductivity. For example, molybdenum, sintered SiC, recrystallized SiC, artificial graphite, iron, tungsten, etc. can also be used. However, when molybdenum is used, it is preferably used in a non-oxidizing environment. Also, when molybdenum is used in an oxidizing environment, it is preferable to perform an oxidation-resistant coating. Also, sintered SiC can be used in an oxidizing environment, and artificial graphite, iron, and tungsten can be used in a non-oxidizing environment. Furthermore, it is more desirable that in order to promote the heat exchange between the cooling adjustment plate and the glass plate due to heat radiation, in the case of using a material with a low emissivity, the surface of the heat-resistant member is coated with Materials that increase emissivity are used as cooling adjustment plates 41a, 41b, 41c. the

(5-3) Modification C

In the above-mentioned embodiment, channel steel (channel steel shape) was used as the cooling adjustment plates 41a, 41b, 41c, but the cooling adjustment plates 41a, 41b, 41c are not limited to the above shapes, and may have other shapes. At this time, it is preferable to set it as the structure which minimizes the contact between adjacent cooling adjustment plates 41a, 41b, and suppresses the heat conduction between adjacent cooling adjustment plates 41a, 41b. For example, the cooling adjustment plates 41 a , 41 b , and 41 c may also be in the shape of a round rod (column), or an odd-numbered polygonal column shape, or the like. the

(5-4) Modification D

In the above-mentioned embodiment, the plurality of outlets 521 are uniformly formed on the main pipe 52a, but the plurality of outlets 521 may be formed at intervals based on the distance from the side and the size of the outlets 521 . the

(5-5) Modification E

In the above-mentioned embodiment, as an example when manufacturing the glass plate 91 used for the glass substrate of the G5 size, the length in the longitudinal direction of the cooling adjustment plates 41a, 41b, 41c or the number of the cooling adjustment units 40a to 40f (6 ), but it is also possible to adjust the length in the longitudinal direction or the number of cooling adjustment units according to the size of the glass plate 91 to be manufactured. the

(5-6) Modification F

Furthermore, ideally, in the above-mentioned embodiment, the main part 43a of the cooling adjustment plate 41a maintains a high straightness in the width direction, but it can also be convex and concave in the height direction. Thereby, the flow of the updraft generated along the glass plate 91 can be suppressed, and the generation|occurrence|production of the cooling rate difference by a part can be suppressed. the

(5-7) Modification G

In the glass plate manufacturing apparatus 100 of the above-mentioned embodiment, the gas supply unit 54 can also be configured to supply gas to the cooling adjustment unit 40a, and it is also possible to use the gas supply unit 54 to supply the plurality of cooling adjustment units 40a to 40f. The composition of the supplied gas. the

Symbol Description

10 Formed body

11 slot

20 Separation components for the upper and lower environments

30 Cool Roller

40a～40f Cooling adjustment unit

41a, 41b, 41c cooling adjustment plate

42a, 42b, 42c bending part

43a, 43b Main part

50a Temperature Control Unit

51a, 51b, 51c tube

52a Supervisor

55 Gas supply valve

57a Gas control unit

60 Pull down roller

90 Molten Glass

91 Glass plate

100 Glass plate manufacturing equipment

101 Forming device

521 Blow outlet

531a, 532a Auxiliary pipe

Patent Documents

Patent Document 1: Japanese Patent Application Laid-Open No. 2-225326

Claims (8)

1. A glass plate manufacturing apparatus (100), which causes molten glass (90) overflowing from a forming body (10) to flow down along both side surfaces of the forming body, and then merges the molten glass near the lower end of the forming body And manufacture glass plate (91), it is characterized in that, has: A plurality of cooling adjustment plates (41a, 41b, 41c) are arranged side by side along the flow direction of the above-mentioned molten glass below the confluence point of the above-mentioned molten glass, and adjust the cooling speed of the above-mentioned glass plate; and A temperature control unit (50a) is provided corresponding to each cooling adjustment plate, and controls the temperature of each cooling adjustment plate. the 2. The glass sheet manufacturing apparatus according to claim 1, wherein, The plurality of cooling adjustment plates are disposed below an upper and lower environment partition member (20), which is disposed near a confluence point of the molten glass and separates an upper environment and a lower environment of the confluence point. . the 3. The glass sheet manufacturing apparatus according to claim 1 or 2, wherein, Each of the above-mentioned cooling adjustment plates extends in a horizontal direction intersecting with the flow direction of the above-mentioned molten glass, The temperature control unit includes a pipe (51a) through which a fluid that cools or heats the entirety of the cooling adjustment plates flows. the 4. The glass sheet manufacturing apparatus according to claim 3, wherein, The above tube contains: The main pipe (52a) is arranged along the length direction of the above-mentioned cooling adjustment plate; and auxiliary pipes (531a, 532a), which are respectively connected to both sides of the above-mentioned main pipe, and transmit gas as a heat exchange medium to the above-mentioned main pipe; and The main pipe has a plurality of outlets (521) for blowing the gas sent from the sub-pipe out of the main pipe to the cooling adjustment plate. the 5. The glass sheet manufacturing apparatus according to claim 4, wherein, Each of the plurality of outlets has a predetermined size in accordance with the distance from the side portion of the main pipe so that the amount of the gas blown out from each outlet becomes uniform. the 6. The glass sheet manufacturing apparatus according to claim 1 or 2, wherein, The cooling adjustment plate is a channel steel, and the main part of the channel steel is opposed to the glass plate. the 7. The glass sheet manufacturing apparatus according to claim 3, wherein, Also has: The first surrounding member (70a) surrounds the first pipe (51a) which is the above-mentioned pipe through which the fluid cooling or heating the first cooling adjustment plate (41a) flows, and is formed to control the temperature of the first cooling adjustment plate (41a). Adjusted 1st space (72a); The second surrounding member (70b) encloses the second pipe (51b) which is the above-mentioned pipe through which the fluid that cools or heats the second cooling adjustment plate (41b) adjacent to the above-mentioned first cooling adjustment plate flows, and is formed to The second space (72b) in which the temperature of the second cooling adjustment plate is adjusted; and A heat insulating member (71) is disposed between the first space and the second space, and blocks heat transfer between the first space and the second space. the 8. The glass sheet manufacturing apparatus according to claim 4, wherein, A gas control unit (57a) for controlling the flow of the gas blown to the cooling adjustment plate is further provided. the

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