OLED glass substrate production equipment based on LTPO process and glass production method

Abstract

The invention provides OLED glass substrate production equipment and a glass production method based on an LTPO manufacturing process, and the OLED glass substrate production equipment based on the LTPO manufacturing process comprises a kiln assembly; the platinum channel assembly comprises a clarifying structure, a stirring structure and a cooling structure, the clarifying structure, the stirring structure and the cooling structure are sequentially communicated, and the end, away from the stirring structure, of the clarifying structure is communicated with the kiln assembly; and the forming assembly comprises a forming overflow brick and a detection structure, the forming overflow brick communicates with the end, away from the stirring structure, of the cooling structure, and the detection structure is arranged towards the forming overflow brick. According to the technical scheme, the problem that in the prior art, in the process that an OLED display glass substrate based on the LTPO manufacturing process is produced through an overflow down-draw method, obvious platinum-rhodium needle-shaped defects exist in glass is effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of glass production, and more particularly to an OLED glass substrate production equipment and glass production method based on the LTPO process. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays, based on LTPO (Low Temperature Polycrystalline Oxide) technology, are the core carriers of modern information output. Rigid and flexible displays (foldable phones, curved TVs), featuring high resolution, high contrast, wide color gamut, and wide refresh rate range, have become mainstream. OLED display glass substrates based on LTPO technology must meet comprehensive physical and chemical performance requirements, including high heat resistance, low thermal shrinkage, and high Young's modulus. Compared to traditional display substrate glass, its manufacturing difficulty is significantly increased, making it globally recognized as the most difficult glass type to manufacture.

[0003] Currently, OLED display glass substrates based on the LTPO process are typically produced using the overflow pull-down method. The raw materials are melted in a furnace, clarified in a platinum channel, and finally pulled out of the forming furnace to form an ultra-thin glass substrate.

[0004] In the existing technology, platinum channels are mainly made of platinum-rhodium alloy. Platinum-rhodium alloy has a high melting point, excellent corrosion resistance and oxidation resistance. However, when the platinum-rhodium alloy is first subjected to physical erosion by the high-temperature glass raw material melt, oxidation in the air and chemical erosion by impurities such as iron powder introduced from the glass raw material, the material of the platinum channel becomes uneven. The platinum channel body will produce a relatively special platinum-rhodium needle-like defect. The platinum-rhodium needle-like defect flows with the glass melt, resulting in obvious defects inside the formed glass, such as CN115974368A. Summary of the Invention

[0005] One of the technical problems this application aims to solve is the existence of obvious platinum-rhodium needle-like defects inside the glass during the production of OLED display glass substrates based on the LTPO process using the overflow pull-down method.

[0006] To address the aforementioned technical problems, this application provides an OLED glass substrate production equipment and glass production method based on the LTPO process.

[0007] According to this application, an OLED glass substrate production equipment based on LTPO process includes: a furnace assembly; a platinum channel assembly, which includes a clarification structure, a stirring structure, and a cooling structure, which are connected in sequence, with the end of the clarification structure away from the stirring structure connected to the furnace assembly; and a molding assembly, which includes a molding overflow brick and a detection structure, with the molding overflow brick connected to the end of the cooling structure away from the stirring structure, and the detection structure detecting the product molded by the molding overflow brick.

[0008] In some embodiments, the clarifying structure includes a first connecting segment and a second connecting segment. The first connecting segment is inclined, a first end of the first connecting segment is connected to a kiln assembly, a second end of the first connecting segment is connected to the first end of the second connecting segment, the height of the first end of the first connecting segment in the vertical direction is lower than the height of the second end of the first connecting segment in the vertical direction, and the second connecting segment is horizontally positioned.

[0009] In some embodiments, the clarification structure further includes a third connecting segment and a fourth connecting segment. The third connecting segment is inclined, with a first end connected to a second end of the second connecting segment, and a second end connected to a first end of the fourth connecting segment. The first end of the third connecting segment is at a higher height in the vertical direction than the second end of the third connecting segment, and the second end of the fourth connecting segment is connected to the stirring structure.

[0010] In some embodiments, the stirring structure includes a stirring section, a stirring part, a fifth connecting section, and a sixth connecting section. The stirring part is rotatably connected to the stirring section, and the stirring part is partially located within the stirring section. The first end of the fifth connecting section is connected to the stirring section, and the second end of the fifth connecting section is connected to the sixth connecting section.

[0011] In some embodiments, the second end of the fourth connecting segment is at a higher height in the vertical direction than the first end of the fifth connecting segment is at a higher height in the vertical direction.

[0012] In some embodiments, the sixth connecting segment is inclined, and the height of the second end of the sixth connecting segment in the vertical direction is higher than the height of the first end of the sixth connecting segment in the vertical direction.

[0013] According to another aspect of this application, a glass manufacturing method is also provided. This glass manufacturing method employs the aforementioned LTPO-based OLED glass substrate manufacturing equipment and includes the following steps:

[0014] Glass production is achieved by feeding platinum channel components into the furnace assembly; The glass products flowing down from the molded overflow brick are inspected using a detection structure; If platinum-rhodium needle-like defects are significant in the glass product, the temperature of the refining and stirring structures should be reduced. The kiln components stop feeding material and the stirring speed within the stirring structure is reduced. After the scheduled time, the kiln components began to be fed. Increase the temperature of the cooling structure to cause a large amount of molten glass to flow out of the cooling structure until the flow of molten glass inside the cooling structure becomes difficult; The temperature of the cooling structure is reduced, and the cooled molten glass wraps around the outside of the formed overflow brick. Resume glass production.

[0015] In some embodiments, during the process of reducing the temperature of the clarification structure and the stirring structure, the temperature of the clarification structure is reduced to 1400℃±100℃, and the temperature of the stirring structure is reduced to 1300℃±100℃.

[0016] In some embodiments, during the process of reducing the temperature of the cooling structure, the temperature of the cooling structure decreases at a uniform rate of 0.42°C to 1.25°C until the temperature reaches 1200°C ± 100°C.

[0017] In some embodiments, during the glass production process, the temperature of the clarification structure is raised to greater than 1500°C, and the temperature of the stirring structure is raised to greater than 1400°C.

[0018] Through the above technical solution, the OLED glass substrate production equipment based on the LTPO process provided in this application melts the glass raw materials in the furnace assembly. The molten glass then enters the platinum channel assembly. Under high temperature, the inner wall of the platinum channel assembly reacts with oxygen in the air and some metallic impurities in the glass raw materials to produce platinum-rhodium oxide. The platinum-rhodium oxide enters the forming assembly along with the molten glass and eventually mixes into the product, forming platinum-rhodium needle-like defects. When the detection structure detects the presence of platinum-rhodium needle-like defects in the glass product, it lowers the temperature of the refining and stirring structures to reduce oxide production. The furnace assembly stops feeding, and the stirring speed of the stirring structure is reduced, thereby reducing the internal airflow speed and reducing the contact between oxygen in the air and the inner wall of the platinum channel assembly. The furnace assembly is then re-fed, and the temperature of the cooling structure is increased. The temperature of the molten glass inside the cooling structure rises, and the viscosity of the molten glass decreases with increasing temperature. The flow rate of the molten glass increases, and the molten glass quickly flows out of the cooling structure, rapidly carrying the platinum-rhodium oxide out of the platinum channel assembly while flushing the forming overflow. The process involves using a brick to clean platinum-rhodium needle-like defects from the surface of the overflow brick. Then, the temperature of the cooling structure is lowered, causing the temperature of the molten glass inside the cooling structure to decrease. As the temperature decreases, the viscosity of the molten glass increases, and the flow rate decreases. The overflow brick is then re-wetted before the forming guide plate is used. Because the furnace components are continuously fed during this process, the inner wall of the entire platinum channel assembly is always covered with a layer of molten glass, preventing air from contacting the inner wall of the platinum channel assembly and generating platinum-rhodium oxides. Once the forming guide plate stabilizes, the temperature and stirring speed of the clarifying and stirring structures are gradually restored to allow for glass production. This technical solution effectively solves the problem of significant platinum-rhodium needle-like defects inside the glass during the production of OLED display glass substrates based on the LTPO process using the overflow pull method in the prior art. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This paper shows a schematic diagram of the main structure of an OLED glass substrate production equipment based on the LTPO process disclosed in an embodiment of this application. Figure 2 It shows Figure 1 A schematic diagram of the structure of an OLED glass substrate production equipment based on the LTPO process; Figure 3 A schematic diagram of the glass production method disclosed in the embodiments of this application is shown.

[0021] Explanation of reference numerals in the attached figures: 10. Kiln components; 11. Kiln structure; 12. Feeder; 20. Platinum channel components; 21. Clarification structure; 211. First connecting section; 212. Second connecting section; 213. Third connecting section; 214. Fourth connecting section; 22. Stirring structure; 221. Stirring section; 222. Stirring part; 223. Fifth connecting section; 224. Sixth connecting section; 23. Cooling structure; 30. Molding components; 31. Molded overflow brick. Detailed Implementation

[0022] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments of the application herein, but includes all technical solutions falling within the scope of the claims.

[0023] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0024] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0026] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0027] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0029] like Figure 1 and Figure 2 As shown in the embodiments of this application, the OLED glass substrate production equipment based on the LTPO process includes: a furnace assembly 10, a platinum channel assembly 20, and a molding assembly 30. The platinum channel assembly 20 includes a clarification structure 21, a stirring structure 22, and a cooling structure 23, which are connected in sequence. The end of the clarification structure 21 away from the stirring structure 22 is connected to the furnace assembly 10. The molding assembly 30 includes a molding overflow brick 31 and a detection structure. The molding overflow brick 31 is connected to the end of the cooling structure 23 away from the stirring structure 22. The detection structure detects the product formed by the molding overflow brick 31.

[0030] Applying the technical solution of this application embodiment, after the furnace assembly 10 melts the glass raw material, the molten glass enters the platinum channel assembly 20. Under high temperature, the inner wall of the platinum channel assembly 20 undergoes an oxidation reaction with oxygen in the air and some metallic impurities in the glass raw material, producing platinum-rhodium oxide. The platinum-rhodium oxide enters the forming assembly 30 along with the molten glass and eventually mixes into the product, forming platinum-rhodium needle-like defects. When the detection structure detects the presence of platinum-rhodium needle-like defects in the glass product, it lowers the temperature of the clarifying structure 21 and the stirring structure 22 to reduce oxide production. The furnace assembly 10 stops feeding and reduces the stirring speed of the stirring structure 22, thereby reducing the internal airflow speed and reducing the contact between oxygen in the air and the inner wall of the platinum channel assembly 20. The furnace assembly 10 refeeds and increases the temperature of the cooling structure 23. The temperature of the molten glass inside the cooling structure 23 rises, and the viscosity of the molten glass decreases with increasing temperature. The flow rate of the molten glass increases, and the molten glass quickly flows out of the cooling structure 23, carrying the platinum-rhodium oxide out of the platinum channel assembly 20 while simultaneously flushing the forming overflow brick 3. 1. To clean the platinum-rhodium needle-like defects on the surface of the forming overflow brick 31, the temperature of the cooling structure 23 is reduced. As the temperature of the molten glass inside the cooling structure 23 decreases, the viscosity of the molten glass increases, and the flow rate decreases. The forming overflow brick 31 is then re-wetted before forming the guide plate. Since the furnace assembly 10 is continuously fed during this process, the inner wall of the entire platinum channel assembly 20 is always covered with a layer of molten glass, preventing air from contacting the inner wall of the platinum channel assembly 20 and generating platinum-rhodium oxides. After the forming guide plate stabilizes, the temperature of the clarifying structure 21 and the stirring structure 22, as well as the stirring speed of the stirring structure 22, are gradually restored for glass production. The technical solution of this embodiment effectively solves the problem of obvious platinum-rhodium needle-like defects inside the glass during the production of OLED display glass substrates based on the LTPO process using the overflow pull method in the prior art.

[0031] like Figure 1 As shown, in the technical solution of this embodiment, the kiln assembly 10 includes a kiln structure 11 and a feeder 12. The discharge port of the feeder 12 is connected to the kiln structure 11. The feeder 12 is responsible for adding glass raw materials into the kiln structure 11. The kiln structure 11 heats the glass raw materials to melt them into molten glass. Electric heating or gas heating can be used.

[0032] like Figure 1As shown, in the technical solution of this embodiment, the clarifying structure 21 includes a first connecting section 211 and a second connecting section 212. The first connecting section 211 is inclined. The first end of the first connecting section 211 is connected to the kiln assembly 10. The second end of the first connecting section 211 is connected to the first end of the second connecting section 212. The height of the first end of the first connecting section 211 in the vertical direction is lower than the height of the second end of the first connecting section 211 in the vertical direction. The second connecting section 212 is horizontally arranged. After flowing out of the furnace assembly 10, the molten glass enters the first connecting section 211. To prevent the molten glass from flowing too fast and impacting the inner wall of the platinum channel assembly 20, thus affecting its stability, the first connecting section 211 is tilted. Since the vertical height of the first end of the first connecting section 211 is lower than that of the second end, the molten glass moves upwards as it flows from the first end to the second end of the first connecting section 211, effectively reducing its flow speed and preventing it from impacting the inner wall of the platinum channel assembly 20. The second connecting section 212 is horizontally positioned. After the glass slows down, it flows slowly within the second connecting section 212, causing some undissolved impurities to settle, thus clarifying the molten glass.

[0033] like Figure 1 As shown in the technical solution of this embodiment, the clarifying structure 21 further includes a third connecting section 213 and a fourth connecting section 214. The third connecting section 213 is inclined, with its first end connected to the second end of the second connecting section 212, and its second end connected to the first end of the fourth connecting section 214. The first end of the third connecting section 213 is higher in the vertical direction than the second end of the third connecting section 214. The second end of the fourth connecting section 214 is connected to the stirring structure 22. After the molten glass flowing out from the second connecting section 212 enters the third connecting section 213, it flows from the first end to the second end of the third connecting section 213. Since the first end of the third connecting section 213 is higher in the vertical direction than the second end of the third connecting section 213, the flow rate of the molten glass increases during this process, facilitating the rapid discharge of the clarified molten glass and preventing its accumulation.

[0034] like Figure 1As shown, in this embodiment, the stirring structure 22 includes a stirring section 221, a stirring part 222, a fifth connecting section 223, and a sixth connecting section 224. The stirring part 222 is rotatably connected to the stirring section 221, and is partially located within the stirring section 221. The first end of the fifth connecting section 223 is connected to the stirring section 221, and the second end of the fifth connecting section 223 is connected to the sixth connecting section 224. The stirring part 222 rotates to stir the molten glass within the stirring section 221. After stirring, the molten glass sequentially enters the cooling structure 23 through the fifth connecting section 223 and the sixth connecting section 224. The molten glass flows in a vortex within the stirring section 221, thereby homogenizing the molten glass and reducing problems such as severe streaks and color differences in subsequent products. It also facilitates the removal of air bubbles from the molten glass, resulting in better appearance quality of the finished product.

[0035] like Figure 1 As shown, in this embodiment, the second end of the fourth connecting section 214 is vertically higher than the first end of the fifth connecting section 223. The second end of the fourth connecting section 214 is located at the upper part of the stirring section 221, and the first end of the fifth connecting section 223 is located at the lower part of the stirring section 221. Under the action of the stirring section 222, the molten glass moves in a spiral downward motion to ensure that the molten glass is thoroughly stirred.

[0036] like Figure 1 As shown, in this embodiment, the sixth connecting segment 224 is inclined, and the height of the second end of the sixth connecting segment 224 in the vertical direction is higher than the height of the first end of the sixth connecting segment 224 in the vertical direction. After the molten glass is stirred by the stirring section 221 and the stirring part 222, the content of internal bubbles is very small. If the flow rate is too fast at this time, air is likely to re-mix into the molten glass and form bubbles during the process of the molten glass moving to the cooling structure 23. Therefore, the height of the second end of the sixth connecting segment 224 in the vertical direction being higher than the height of the first end of the sixth connecting segment 224 in the vertical direction can effectively reduce the flow rate of the molten glass, so that the molten glass flows slowly and flows slowly down the inner wall of the cooling structure 23, making it less likely to generate new bubbles.

[0037] In the technical solution of this embodiment, the clarifying structure 21 is the location with the highest temperature in the entire platinum channel assembly 20, and it is also the location where the oxidation reaction mainly occurs. Under high temperature conditions, the platinum and rhodium on the inner wall of the platinum channel assembly 20 react with oxygen to mainly produce volatile oxides. volatile oxides The glass flows along with the molten glass to the position of the forming overflow brick 31, where a reduction reaction occurs in the low-temperature environment of the forming component 30, resulting in the precipitation of platinum-rhodium crystals on the surface of the forming overflow brick 31, ultimately leading to platinum-rhodium needle-like defects in the product.

[0038] like Figure 3 As shown, in the technical solution of this application embodiment, a glass production method is also provided. The glass production method uses the above-mentioned OLED glass substrate production equipment based on the LTPO process. The glass production method includes the following steps: Glass production is carried out by feeding platinum channel component 20 through furnace component 10; The glass products flowing down from the molded overflow brick 31 are inspected using a detection structure; If platinum-rhodium needle-like defects are obvious in the glass product, the temperature of the refining structure 21 and the stirring structure 22 should be reduced. The kiln component 10 stops feeding and the stirring speed in the stirring structure 22 is reduced. After the scheduled time, the kiln component 10 began to be fed; Increase the temperature of the cooling structure 23 to cause a large amount of molten glass to flow out of the cooling structure 23 until the flow of molten glass inside the cooling structure 23 becomes difficult. The temperature of the cooling structure 23 is reduced, and the cooled molten glass wraps around the outside of the molded overflow brick 31. Resume glass production.

[0039] In this application, the detection structure uses a laser detection sensor. If obvious point or line defects are detected in the glass, a scanning electron microscope or electron probe is used to further detect the defect to determine the defect composition and whether it is a platinum-rhodium needle defect.

[0040] If obvious platinum-rhodium needle-like defects are detected in the glass product, it indicates that there are a large amount of platinum-rhodium oxide volatiles inside the platinum channel component 20 and a large amount of platinum-rhodium crystals on the surface of the forming overflow brick. To ensure product quality, the temperature of the refining structure 21 and the stirring structure 22 is first reduced to decrease the oxidation reaction within them and reduce the generation of platinum-rhodium oxide volatiles. The stirring speed in the stirring structure 22 is reduced, thereby reducing the airflow rate and decreasing the contact between the molten glass, air, and the inner wall of the platinum channel component 20, further reducing the generation of platinum-rhodium oxide volatiles. At the same time, feeding is stopped while maintaining a constant discharge rate. At this time, the molten glass level in the cooling structure 23 drops, and the molten glass flows out slowly. The main purpose of discharging part of the molten glass during this process is to prevent the forming component 30 from becoming clogged during the subsequent rapid discharge of the molten glass. After discharging part of the molten glass, the volume of the remaining molten glass in the cooling structure 23 is 2 to 3 times the total capacity of the forming component 30, preventing excessive molten glass from causing clogged forming component 30. Restarting the furnace assembly 10 slightly increases the amount of material added to the platinum channel assembly 20. This prevents the molten glass inside the platinum channel assembly 20 from drying out during the rapid discharge process of the subsequent cooling structure 23. Increasing the temperature of the cooling structure 23 reduces the viscosity of the molten glass inside, accelerating its flow rate. The molten glass inside the cooling structure 23 is then rapidly discharged into the forming assembly 30. During this process, the forming assembly 30 does not need to form the molten glass. The molten glass drives the rapid flow of air inside the platinum channel assembly 20, causing volatile platinum and rhodium oxides in the air to flow out with it. The high-velocity molten glass washes over the surface of the forming overflow brick 31, carrying away platinum and rhodium crystals from the surface of the forming overflow brick. This prevents the subsequent glass from contacting these crystals during forming at the forming overflow brick 31, which could lead to platinum and rhodium needle-like defects. When the molten glass flow rate decreases significantly, it indicates that the molten glass inside the cooling structure 23 has been largely discharged. The temperature of the cooling structure 23 is then lowered. The cooled molten glass flows slowly, gradually coating the outer surface of the forming overflow brick 31, preventing the platinum and rhodium oxides from re-crystallizing on the surface of the forming overflow brick. During this process, the furnace assembly 10 continuously feeds the platinum channel assembly 20, ensuring that molten glass is always present inside the platinum channel assembly 20. The molten glass covers the inner wall surface of the platinum channel assembly 20, preventing oxidation reactions that would occur when the inner wall of the platinum channel assembly 20 comes into contact with air, thus preventing the formation of new platinum-rhodium oxides and preparing for subsequent production. The feeding rate of the feeder 12 is increased, at which point the feeding rate of the platinum channel assembly 20 is greater than the discharge rate. This increases the temperature of the refining structure 21 and the stirring structure 22, increases the stirring speed within the stirring structure 22, and causes the molten glass level in the cooling structure 23 to rise until the molten glass level stabilizes, at which point the values ​​used during glass production are restored.

[0041] like Figure 3As shown, in the technical solution of this embodiment, during the process of reducing the temperature of the clarifying structure 21 and the stirring structure 22, the temperature of the clarifying structure 21 is reduced to 1400℃±100℃, and the temperature of the stirring structure 22 is reduced to 1300℃±100℃. This cooling process lasts for 20 to 40 hours, and this temperature is maintained during the subsequent glass melt discharge process to reduce the generation of platinum-rhodium oxide.

[0042] like Figure 3 As shown, in this embodiment, during the process of lowering the temperature of the cooling structure 23, the temperature of the cooling structure 23 decreases at a uniform rate of 0.42℃ to 1.25℃, until the temperature reaches 1200℃±100℃. If the temperature of the cooling structure 23 suddenly drops during this process, and the internal volume of the molten glass is large, cooling becomes difficult, leading to excessively large local temperature differences in the cooling structure 23, which can cause it to easily break. During this process, as the temperature of the cooling structure 23 decreases, the viscosity of the molten glass continuously increases. The molten glass slowly drains from the cooling structure 23 and coats the outside of the forming overflow brick 31, reducing the possibility of platinum-rhodium oxide re-adhering to the forming overflow brick 31 during subsequent production.

[0043] like Figure 3 As shown, in the technical solution of this embodiment, during the glass production process, the temperature of the refining structure 21 is raised to above 1500°C, and the temperature of the stirring structure 22 is raised to above 1400°C. This heating process lasts for 10 to 30 hours. During this time, the overflow brick 31 is re-guided to form the glass plate. After the glass plate is formed and stabilized, the feeding rate of the furnace component 10 is increased. At this time, the feeding rate is greater than the discharge rate, and the liquid level in the cooling structure 23 rises until the process stabilizes. Then, the feeding rate and the discharge rate are kept consistent, and the liquid level of the molten glass is stabilized.

[0044] Control group A removed platinum-rhodium crystals by high-temperature water washing of the formed overflow brick 31. After two high-temperature washes, the formed overflow brick 31 of control group A met the production requirements. During the washing process, the discharge port of the platinum channel assembly 20 needed to be opened to discharge the molten glass from the platinum channel assembly 20. Experimental group B used the technical solution of this embodiment to remove platinum-rhodium crystals, and the product quality was inspected separately. Table 1 shows the inspection results of the two methods.

[0045] Table 1

[0046] As shown in Table 1, the technical solution of this application results in smaller platinum needle-like defects, higher product qualification rate, and faster production line recovery time after glass production resumes.

[0047] In summary, the following steps are crucial: 1. The temperature of the clarification section (clarification structure 21) and 2. the stirring section (stirring structure 22) of the platinum channel is lowered to a safe temperature beforehand. This temperature is maintained to ensure that the temperature of clarification section 2 is 1400℃±100℃ and the temperature of stirring section 3 does not exceed 1300℃±100℃. The cooling process takes 20-40 hours to complete. If the temperature is not lowered, excessively high temperatures may cause the metal structure of the platinum channel to loosen and its strength to decrease; this could lead to a sudden drop in the liquid level, causing the platinum channel to collapse due to the loss of glass melt support. 2. The furnace (furnace structure 11) stops feeding by removing the feeder 121. The discharge rate of the channel is maintained at the same level as when the production line guide plate is in operation. The liquid level begins to drop slightly to prevent the discharge rate from becoming too large and causing blockage in the forming area. The speed of the stirring rod 5 is reduced to the initial speed. After the liquid level drops slightly to 5, the feeder 12 is pushed back in to feed a small amount of material to maintain the basic feeding rate, which is generally not lower than the wetting feeding rate. At this time, the discharge rate of the channel is increased to the maximum by heating the cooling section (cooling structure 23) 4 by about 20-40°C. At this time, the glass liquid flow rate increases and the glass viscosity decreases. The remaining glass liquid inside the platinum channel (platinum channel component 20) is discharged and flushed in the forming overflow brick trough (forming overflow brick). When the discharge rate of the channel begins to decrease significantly, it indicates that there is no excess glass liquid inside the channel. At this time, it is confirmed that the glass liquid in the platinum channel has been discharged. After confirming that the liquid level 5 has been reduced, the furnace discharge rate is matched to the wetting discharge rate. The wetting process begins with the removal of the forming equipment, and the number of wetting days is consistent with the first wetting after heating. During the wetting process in the cooling section, the temperature of the supplied molten glass is consistent with the temperature of the first wetting after heating. During this period, the furnace maintains the theoretical discharge rate and controls it according to the normal production discharge rate. At this time, there is no molten glass level in the platinum channel, and the discharge rate is the same as the amount of glass added. During the forming wetting process, the channel gradually reduces the temperature of the cooling section according to the forming requirements, so that the molten glass completely covers the overflow brick. The temperature of the cooling section 4 decreases in batches according to the wetting time, and the final temperature does not exceed 1200℃±100℃, decreasing by 10℃-30℃ per day. After the molten glass cools down, its viscosity increases, and it will completely cover the overflow brick. Wetting refers to the process where the molten glass covers the overflow brick, wraps around and washes the overflow brick. The wetting process will cause the molten glass to wash the overflow brick again, carrying away the needle-like crystals in the overflow brick, further reducing defects. After wetting and forming the sprue, the temperatures of the refining and stirring sections are raised to normal production temperatures. The refining section temperature is above 1500℃, and the stirring section temperature is above 1400℃, taking 10-30 hours to reach the target. After successful forming and sprue formation, the furnace begins to increase the feed rate to re-establish the glass liquid level. The feed rate is controlled to be greater than the discharge rate, creating a feed difference. The liquid level establishment rate is generally higher than that established after heating. The channel is stabilized, and the discharge rate is controlled to the normal production discharge rate. The glass liquid level begins to gradually rise to the normal production level, which is generally the initial establishment time. The liquid level establishment time is generally 3-10 days. During this period, the stirring rod speed is adjusted to the normal production speed.

[0048] The above method has the following beneficial effects: This method focuses on rapidly increasing the output by tens of kilograms in a short time while protecting the molding equipment from blockage. It quickly reduces the viscosity and flow rate of the molten glass, carrying away a large amount of platinum-rhodium needle-like crystals from the overflow brick trough to empty the liquid level, thus removing platinum-rhodium oxide-containing molten glass from the platinum channels. Upon rewetting, the molten glass again flushes the overflow brick, carrying away any remaining platinum-rhodium needle-like crystals, further reducing defects. After the production line is heated and the liquid level is established, this defect does not occur on every production line; therefore, it is not necessary to place glass fragments in the overflow brick each time, as in patent CN115974368B. If the number of such defects is extremely large when the production line enters normal production, and conventional high-temperature rinsing measures do not significantly reduce the number, this method can quickly empty the liquid level, raise the temperature, and increase the output and glass flow rate while protecting equipment safety, achieving rapid countermeasures against needle-like defects. This method allows for a quick recovery time of up to 5 days before the next batch of plates can be drawn. The countermeasures were effective, and once the liquid level was established, the packaging of good products could begin.

[0049] The embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions of this application based on the above description.

[0050] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. An OLED glass substrate production equipment based on LTPO process, characterized in that, include: Kiln components (10); The platinum channel assembly (20) includes a clarification structure (21), a stirring structure (22), and a cooling structure (23). The clarification structure (21), the stirring structure (22), and the cooling structure (23) are connected in sequence. The end of the clarification structure (21) away from the stirring structure (22) is connected to the kiln assembly (10). The molding component (30) includes a molding overflow brick (31) and a detection structure. The molding overflow brick (31) is connected to the end of the cooling structure (23) away from the stirring structure (22). The detection structure detects the product formed by the molding overflow brick (31).

2. The OLED glass substrate production equipment based on LTPO process according to claim 1, characterized in that, The clarification structure (21) includes a first connecting section (211) and a second connecting section (212). The first connecting section (211) is inclined. The first end of the first connecting section (211) is connected to the kiln assembly (10). The second end of the first connecting section (211) is connected to the first end of the second connecting section (212). The height of the first end of the first connecting section (211) in the vertical direction is lower than the height of the second end of the first connecting section (211) in the vertical direction. The second connecting section (212) is horizontal.

3. The OLED glass substrate production equipment based on LTPO process according to claim 2, characterized in that, The clarification structure (21) further includes a third connecting section (213) and a fourth connecting section (214). The third connecting section (213) is inclined. The first end of the third connecting section (213) is connected to the second end of the second connecting section (212). The second end of the third connecting section (213) is connected to the first end of the fourth connecting section (214). The height of the first end of the third connecting section (213) in the vertical direction is higher than the height of the second end of the third connecting section (213) in the vertical direction. The second end of the fourth connecting section (214) is connected to the stirring structure (22).

4. The OLED glass substrate production equipment based on LTPO process according to claim 3, characterized in that, The stirring structure (22) includes a stirring section (221), a stirring part (222), a fifth connecting section (223), and a sixth connecting section (224). The stirring part (222) is rotatably connected to the stirring section (221). The stirring part (222) is partially located inside the stirring section (221). The first end of the fifth connecting section (223) is connected to the stirring section (221), and the second end of the fifth connecting section (223) is connected to the sixth connecting section (224).

5. The OLED glass substrate production equipment based on LTPO process according to claim 4, characterized in that, The second end of the fourth connecting segment (214) is at a higher vertical height than the first end of the fifth connecting segment (223).

6. The OLED glass substrate production equipment based on LTPO process according to claim 4, characterized in that, The sixth connecting segment (224) is inclined, and the height of the second end of the sixth connecting segment (224) in the vertical direction is higher than the height of the first end of the sixth connecting segment (224) in the vertical direction.

7. A glass production method, characterized in that, The glass production method employs the OLED glass substrate production equipment based on the LTPO process as described in any one of claims 1 to 6, and the glass production method includes the following steps: Glass production is carried out by feeding the platinum channel assembly (20) through the furnace assembly (10); The glass products flowing down from the molded overflow brick (31) are inspected using the detection structure; If the platinum-rhodium needle-like defects are obvious in the glass product, the temperature of the clarifying structure (21) and the stirring structure (22) shall be reduced. The kiln assembly (10) stops feeding and reduces the stirring speed in the stirring structure (22); After the predetermined time, the kiln assembly (10) begins to be fed; Increase the temperature of the cooling structure (23) to cause a large amount of molten glass to flow out of the cooling structure (23) until the molten glass inside the cooling structure (23) becomes difficult to flow. The temperature of the cooling structure (23) is reduced, and the cooled glass liquid is wrapped around the outside of the molded overflow brick (31); Resume glass production.

8. The glass production method according to claim 7, characterized in that, During the process of reducing the temperature of the clarification structure (21) and the stirring structure (22), the temperature of the clarification structure (21) is reduced to 1400℃±100℃, and the temperature of the stirring structure (22) is reduced to 1300℃±100℃.

9. The glass production method according to claim 7, characterized in that, During the process of reducing the temperature of the cooling structure (23), the temperature of the cooling structure (23) decreases at a constant rate of 0.42°C to 1.25°C until the temperature reaches 1200°C ± 100°C.

10. The glass production method according to claim 7, characterized in that, During the glass production process, the temperature of the clarifying structure (21) is raised to greater than 1500°C, and the temperature of the stirring structure (22) is raised to greater than 1400°C.

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