Apparatus and method for controlling the amount of substrate glass extracted and homogenizing the glass liquid.

Abstract

The present invention discloses a substrate glass extraction amount control and glass liquid homogenization supply device and method. The device includes a supply device and an auxiliary heating device. The supply device is composed of a supply inner pipe and a supply outer pipe, and the supply inner pipe is arranged inside the supply outer pipe. The supply outer pipe is composed of a supply upper outer pipe, a supply middle outer pipe, a supply lower outer pipe, and a variable-diameter circular pipe. The supply upper outer pipe is attached to the upper end of the supply middle outer pipe, and the supply lower outer pipe is attached to the lower end. The supply upper outer pipe, the supply middle outer pipe, and the supply lower outer pipe are connected by the variable-diameter circular pipe. Further, the auxiliary heating device is composed of an inner heater and an outer heater. In the present invention, by differentially adjusting the currents of the inner heater and the outer heater, the inside and outside of the glass liquid are heated simultaneously, and by controlling the temperature of the glass liquid to rise or fall simultaneously inside and outside, the temperature uniformity of the glass liquid after heating or cooling is ensured, the adjustment reaction time of the extraction amount is shortened, and precise control of the extraction amount is realized.

Description

Technical Field

[0001] The present invention belongs to the field of manufacturing substrate glass, and specifically relates to a device and method for controlling the extraction amount of substrate glass and homogenously supplying glass liquid.

Background Art

[0002] Substrate glass is one of the important raw materials constituting a liquid crystal panel and has a very great influence on the performance of panel products. Indicators such as the resolution, transmittance, thickness, weight, and viewing angle of panel products are closely related to the quality of the substrate glass used.

[0003] In the manufacturing process of substrate glass, the prepared raw materials are melted at a high temperature in a melting furnace to form glass liquid, and through processes such as heating and fining and cooling and stirring in a platinum channel, the temperature of the high-temperature glass liquid is made to conform to the conditions for forming and supplying. The supply device is one of the important facilities in the manufacturing process of substrate glass, and its main function is to stably and uniformly supply the glass liquid to the forming part to achieve high-quality overflow down-draw forming.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since fluctuations in the supply temperature of the glass liquid and stable control of the extraction amount (drawing amount) are required, the supply device needs to continuously heat the glass liquid to ensure the desired supply temperature and a stable extraction amount. However, in the current supply device, heating by a single-sided heater causes non-uniformity in the internal and external temperatures of the supplied glass liquid, extending the temperature response time of the glass liquid. As a result, rapid response and precise control for adjusting the extraction amount cannot be achieved, which affects the quality of the overflow down-draw during forming, causing defects such as non-uniformity in the thickness, stress, and warpage of the substrate glass, leading to a situation that does not meet the requirements.

[0005] The present invention aims to solve the problems of defects in the substrate glass caused by non-uniformity of the internal and external temperatures of the supplied glass liquid, and the difficulty in achieving a rapid response and precise control to adjusting the extraction amount. [Means for solving the problem]

[0006] This invention discloses an apparatus and method for precisely controlling the extraction amount of substrate glass and supplying homogenized glass liquid, thereby eliminating defects in the substrate glass caused by non-uniformity of the internal and external temperatures of the supplied glass liquid, and enabling rapid response and precise control to adjustments in the extraction amount.

[0007] To achieve the above objective, the present invention employs the following technical means. The present invention includes a supply device (1) and an auxiliary heating device (2), the supply device (1) includes a supply inner pipe (3) and a supply outer pipe (4), the supply inner pipe (3) is arranged inside the supply outer pipe (4), the supply outer pipe (4) includes a supply upper outer pipe (4-1), a supply middle outer pipe (4-2), a supply lower outer pipe (4-3) and a variable diameter circular pipe, the upper supply outer pipe (4-1) is provided at the upper end of the supply middle outer pipe (4-2), the lower supply lower outer pipe (4-3) is provided at the lower end of the supply upper outer pipe ( The present invention discloses a substrate glass extraction amount control and glass liquid homogenization supply device, characterized in that 4-1), the supply inner outer tube (4-2), and the supply lower outer tube (4-3) are connected by the variable diameter circular tube, the auxiliary heating device (2) includes an inner heater (6) and an outer heater (8), the inner heater (6) is located inside the supply inner tube (3) and installed in conjunction with the supply inner tube (3), and the outer heater (8) surrounds the supply outer tube (4) and is installed in conjunction with the supply outer tube (4).

[0008] Furthermore, the upper supply outer tube (4-1), the middle supply outer tube (4-2), and the lower supply outer tube are circular straight tubes, and their shape is that of a hollow cylinder, while the shape of the variable diameter circular tube is that of a hollow cone.

[0009] Furthermore, the diameter of the circular cross-section of the supply outer tube (4-2) is greater than the diameter of the circular cross-section of the supply lower outer tube (4-3), the diameter of the circular cross-section of the supply lower outer tube (4-3) is greater than the diameter of the circular cross-section of the supply upper outer tube (4-1), and the length of the supply outer tube (4-2) is greater than the length of the supply lower outer tube (4-3), and the length of the supply lower outer tube (4-3) is greater than the length of the supply upper outer tube (4-1).

[0010] Furthermore, the supply pipe (3) uses both a circular straight pipe and a conical pipe, with the conical pipe being attached to the end of the circular straight pipe of the supply pipe (3).

[0011] Furthermore, the supply inner tube (3) and the supply outer tube (4) are made of a platinum-rhodium alloy material, and the outer heater (8) is wrapped in an insulating material (10), and the insulating material (10), the inner heater (6), and the outer heater (8) are made of aluminum oxide material.

[0012] Furthermore, the inner heater (6) is cylindrical in shape, and pure platinum wires are embedded inside both the inner heater (6) and the outer heater (8), with the diameter of the pure platinum wires being 2.5 mm to 3.0 mm.

[0013] Furthermore, an internal filling gap (7) is formed between the inner heater (6) and the supply inner pipe (3), an external filling gap (9) is formed between the outer heater (8) and the supply outer pipe (4), and a supply space (5) is formed between the supply inner pipe (3) and the supply outer pipe (4). The widths of the internal filling gap (7) and the external filling gap (9) are 10 to 20 mm.

[0014] Furthermore, aluminum oxide powder is used as the material to fill the internal filling gap (7) and the external filling gap (9).

[0015] Furthermore, the length of the inner supply pipe (3) is set to be shorter than the length of the outer supply pipe (4) to ensure that the glass liquid in the supply space (5) is reliably integrated at the outlet of the supply device.

[0016] Furthermore, the present invention discloses a substrate glass extraction amount control and glass liquid homogenization supply method, characterized in that, based on the apparatus, when a command is given to decrease or increase the extraction amount in the molding process, the currents of the inner heater (6) and the outer heater (8) are simultaneously adjusted to control the temperature by the current, thereby ensuring precise control of the glass liquid extraction amount and uniformity of the glass liquid temperature after the extraction amount adjustment; when the glass liquid extraction amount decreases in the molding process, the currents of the inner heater (6) and the outer heater (8) are simultaneously decreased to control the glass liquid temperature to decrease uniformly by reducing the current; and when the glass liquid extraction amount increases in the molding process, the currents of the inner heater (6) and the outer heater (8) are simultaneously increased to control the glass liquid temperature to rise uniformly by increasing the current. [Effects of the Invention]

[0017] The substrate glass extraction amount control and glass liquid homogenization supply apparatus according to the present invention provides the following beneficial effects. This invention provides an apparatus for controlling the extraction amount of substrate glass and supplying homogenized glass liquid. Specifically, it comprises a supply device and an auxiliary heating device. The supply device consists of an inner supply tube and an outer supply tube, with the inner supply tube located inside the outer supply tube. The auxiliary heating device consists of an inner heater and an outer heater, with the inner heater located inside the inner supply tube and the outer heater located outside the outer supply tube. This structure ensures temperature uniformity of the glass liquid for molding and avoids defects in the substrate glass caused by temperature unevenness. Furthermore, the arrangement of the inner and outer heaters enables rapid response to adjustments in the extraction amount and precise control, effectively improving production efficiency.

[0018] The present invention provides a method for controlling the extraction amount of substrate glass and homogenizing and supplying the glass liquid. By differentially adjusting the currents of the inner heater and the outer heater to heat the glass liquid in the supply device, the defect problem of substrate glass caused by temperature non-uniformity of the glass liquid for forming is solved. Furthermore, by simultaneously increasing and decreasing the temperatures inside and outside the glass liquid, the adjustment reaction time of the extraction amount is shortened, and rapid response and precise control are achieved. Thereby, the production efficiency can be effectively improved.

Brief Description of the Drawings

[0019] [Figure 1] It is a schematic diagram of an apparatus for precisely controlling the extraction amount of substrate glass and homogenizing and supplying the glass liquid. [Figure 2] It is an axial sectional view of an apparatus for precisely controlling the extraction amount of substrate glass and homogenizing and supplying the glass liquid. [Figure 3] It is a longitudinal sectional view of an apparatus for precisely controlling the extraction amount of substrate glass and homogenizing and supplying the glass liquid. [Figure 4] It is a partially enlarged view of the longitudinal sectional view of an apparatus for precisely controlling the extraction amount of substrate glass and homogenizing and supplying the glass liquid.

Embodiments for Carrying Out the Invention

[0020] For those skilled in the art to better understand the present invention, based on the accompanying drawings, the technical means and embodiments of the present invention will be described in more detail. The following content is an explanation of the present invention and does not limit the present invention.

[0021] In this specification and the claims, the terms "comprising", "having" and their variants are intended to cover non-exclusive inclusion. For example, a process, method, system, product or apparatus comprising a series of steps or elements is not limited to these explicitly listed steps or elements, but may include other steps or elements, or other steps or elements inherent to these processes, methods, systems, products or apparatuses.

[0022] The device for precisely controlling the extraction amount of the substrate glass and homogenizing and supplying the glass liquid includes a platinum supply device 1 and an auxiliary heating device 2. The platinum supply device 1 includes a supply inner tube 3, a supply outer tube 4, and a supply space 5 formed between the supply inner tube 3 and the supply outer tube 4. The auxiliary heating device 2 includes an inner heater 6, an outer heater 8, an inner filling gap 7 formed between the inner heater 6 and the inner wall of the supply inner tube 3, and an outer filling gap 9 formed between the outer heater 8 and the outer wall of the supply outer tube 4. The outer periphery of the outer heater 8 is covered with a heat insulating material 10. The glass liquid in the supply space 5 is aggregated into one at the outlet of this supply device.

[0023] The supply inner tube 3 is a circular straight tube with a diameter of 130 - 150 mm. The supply outer tube 4 is a circular straight tube with unequal diameters. The diameter of the upper supply outer tube 4-1 is 150 - 170 mm and the height is 300 - 400 mm. The diameter of the middle supply outer tube 4-2 is 300 - 340 mm and the height is 300 - 350 mm. The diameter of the lower supply outer tube 4-3 is 190 - 230 mm and the height is 900 - 1000 mm. The upper supply outer tube 4-1, the middle supply outer tube 4-2, and the lower supply outer tube 4-3 are connected by a circular tube with a variable diameter (for example, a reduced-diameter circular tube). The wall thickness between the supply inner tube 3 and the supply outer tube 4 is 0.8 mm - 1.2 mm, and all the materials are platinum-rhodium alloys with a mass ratio of rhodium of 5% or more.

[0024] The auxiliary heating device 2 is divided into 5 - 10 groups from top to bottom, and each group includes an inner heater 6 and an outer heater 8. The outer heater 8 has the same shape as the supply outer tube 4 and is fittedly attached. The inner heater 6 is cylindrical.

[0025] The inner heater 6, the outer heater 8, and the heat insulating material 10 are made of aluminum oxide material, the thermal conductivity of which is 3 kcal / (m·h·℃) or less, and the thickness of the heat insulating material 10 is 50 - 150 mm.

[0026] Pure platinum wires are embedded inside the inner heater 6 and outer heater 8, and heat is generated by the self-heating of the platinum when power is applied. The diameter of these pure platinum wires is 2.5 to 3.0 mm. The width of the inner filling gap 7 and outer filling gap 9 is 10 to 20 mm. The filling material for the inner filling gap 7 and outer filling gap 9 is aluminum oxide powder, which is filled by injecting a slurry of the aluminum oxide powder and pure water at 60 to 90°C in a ratio of 2 to 5:1.

[0027] This invention discloses a method for precisely controlling the extraction amount of substrate glass and supplying homogenized glass liquid. In this method, glass liquid is introduced into a supply device from a supply inlet, and when an instruction is given to decrease or increase the extraction amount during molding, the supply device controls the extraction amount by raising or lowering the temperature of the glass liquid. Specifically, by adjusting the current of the inner heater 6 and the outer heater 8, the temperature inside and outside the glass liquid is raised or lowered simultaneously, shortening the reaction time for adjusting the extraction amount and enabling precise control of the extraction amount.

[0028] Furthermore, when the glass liquid enters the supply device from the supply inlet and its temperature is lower or higher than the supply temperature required for molding, it is necessary to raise or lower the temperature of the glass liquid. In this case, by differentiating the current of the inner heater 6 and the outer heater 8, the inside and outside of the glass liquid can be heated simultaneously, ensuring uniformity of the glass liquid temperature after heating or cooling.

[0029] It is common technical knowledge that the present invention can be implemented by other embodiments without departing from its spirit or essential features. Therefore, the embodiments of the present invention described above are merely examples and do not limit the invention, and the present invention is subject to various modifications and changes. All modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are covered by the protection of the present invention. [Explanation of Symbols]

[0030] 1 Feeding device 2 Auxiliary heating device 3 Supply inner pipe 4. Supply to external management 4-1 Supply to the upper outer pipe 4-2 Supply to Central China 4-3 Supply to the lower outer pipe 5. Supply space 6 inner side 7. Internal filling gap 8 outside ヒータ 9. External filling gap 10 Thermal insulation materials

Claims

1. It includes a supply device (1) and an auxiliary heating device (2), The supply device (1) includes a supply inner pipe (3) and a supply outer pipe (4), the supply inner pipe (3) being located inside the supply outer pipe (4), the supply outer pipe (4) including a supply upper outer pipe (4-1), a supply middle outer pipe (4-2), a supply lower outer pipe (4-3), and a variable diameter circular pipe, the supply upper outer pipe (4-1) being provided at the upper end of the supply middle outer pipe (4-2), and the supply lower outer pipe (4-3) being provided at the lower end of the supply middle outer pipe (4-2), The upper supply outer pipe (4-1), the middle supply outer pipe (4-2), and the lower supply outer pipe (4-3) are connected by the diameter-changing circular pipe. The auxiliary heating device (2) includes an inner heater (6) and an outer heater (8), the inner heater (6) being positioned inside the supply inner pipe (3) and installed in conjunction with the supply inner pipe (3), and the outer heater (8) surrounding the supply outer pipe (4) and installed in conjunction with the supply outer pipe (4). An internal filling gap (7) is formed between the inner heater (6) and the supply inner pipe (3), an external filling gap (9) is formed between the outer heater (8) and the supply outer pipe (4), and a supply space (5) is formed between the supply inner pipe (3) and the supply outer pipe (4). The widths of the internal filling gap (7) and the external filling gap (9) are 10 to 20 mm. A substrate glass extraction volume control and glass liquid homogenization supply apparatus characterized by the above.

2. The substrate glass extraction amount control and glass liquid homogenization supply apparatus according to claim 1, wherein the upper supply outer tube (4-1), the middle supply outer tube (4-2), and the lower supply outer tube are circular straight tubes, and their shape is that of a hollow cylinder, and the shape of the variable diameter circular tube is that of a hollow circular base.

3. The substrate glass extraction amount control and glass liquid homogenization supply apparatus according to claim 2, wherein the diameter of the circular cross-section of the supply inner outer tube (4-2) is greater than the diameter of the circular cross-section of the supply lower outer tube (4-3), the diameter of the circular cross-section of the supply lower outer tube (4-3) is greater than the diameter of the circular cross-section of the supply upper outer tube (4-1), and the length of the supply inner outer tube (4-2) is greater than the length of the supply lower outer tube (4-3), and the length of the supply lower outer tube (4-3) is greater than the length of the supply upper outer tube (4-1).

4. The substrate glass extraction amount control and glass liquid homogenization supply apparatus according to claim 1, wherein the supply internal pipe (3) uses a circular straight pipe and a conical pipe, and the conical pipe is attached to the end of the circular straight pipe of the supply internal pipe (3).

5. The supply inner tube (3) and the supply outer tube (4) are made of a platinum-rhodium alloy material, and the outside of the outer heater (8) is wrapped in an insulating material (10). The substrate glass extraction amount control and glass liquid homogenization supply apparatus according to claim 1, wherein the heat insulating material (10), the inner heater (6), and the outer heater (8) are made of aluminum oxide material.

6. The substrate glass extraction amount control and glass liquid homogenization supply apparatus according to claim 1, wherein the inner heater (6) is cylindrical in shape, and pure platinum wires are embedded inside the inner heater (6) and the outer heater (8), and the diameter of the pure platinum wires is 2.5 mm to 3.0 mm.

7. The substrate glass extraction amount control and glass liquid homogenization supply apparatus according to claim 1, wherein aluminum oxide powder is used as the material to fill the internal filling gap (7) and the external filling gap (9).

8. The substrate glass extraction amount control and glass liquid homogenization supply apparatus according to claim 1, wherein the length of the supply inner tube (3) is set to be shorter than the length of the supply outer tube (4), so that the glass liquid in the supply space (5) is reliably integrated at the outlet of the supply apparatus.

9. A method for controlling the amount of substrate glass extracted and homogenizing the glass liquid supply, wherein, based on the apparatus described in any one of claims 1 to 8, when a command to decrease or increase the extraction amount is given in the molding process, the currents of the inner heater (6) and the outer heater (8) are simultaneously adjusted, and the temperature is controlled by the current, thereby ensuring precise control of the amount of glass liquid extracted and uniformity of the glass liquid temperature after the extraction amount adjustment. If the amount of glass liquid extracted decreases during the molding process, the currents of the inner heater (6) and the outer heater (8) are simultaneously reduced to control the temperature of the glass liquid to decrease uniformly by reducing the current. A method for controlling the amount of glass extracted from a substrate and homogenizing the supply of glass liquid, characterized in that, when the amount of glass liquid extracted increases in the molding process, the currents of the inner heater (6) and the outer heater (8) are simultaneously increased, and the temperature of the glass liquid is controlled to rise uniformly by increasing the current.

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