Glass hot bending mold and glass hot bending method

Abstract

The invention provides a glass hot bending mold and a glass hot bending method.The glass hot bending mold comprises a first mold assembly and a second mold assembly, the first mold assembly is provided with a first profiling face and a first fixing groove, the first fixing groove is formed in the first mold assembly, and a preset distance is formed between the first fixing groove and the first profiling face; the second mold assembly is provided with a second profiling surface and a second fixing groove, the second fixing groove is formed in the second mold assembly, and a preset distance is formed between the second fixing groove and the second profiling surface; and the number of the heating assemblies is multiple, and the multiple heating assemblies are arranged in the first fixing groove and the second fixing groove correspondingly. According to the technical scheme, the problem that in the prior art, in the 3D glass machining process, the glass quality is poor due to the fact that the glass temperature is not uniform is effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of curved glass production, and more particularly to a glass hot bending mold and a glass hot bending method. Background Technology

[0002] In the development of automotive 3D curved screens, in pursuit of aesthetics, designs have become increasingly diverse, with large-size, high-curvature, and other irregularly shaped products emerging one after another. Current large-size curved cover glass processing is largely derived from 3D mobile phone cover glass technology. However, when faced with large-size, high-curvature curved glass, production and processing present enormous challenges, and there is currently no mature processing technology on the market that can match various products.

[0003] Currently, in the production of 3D glass, the graphite mold structure of the concave and convex molds is usually heated by heating plates, and then the 2D glass is bent and formed in a second time by hot pressing.

[0004] In the prior art, since the forming surfaces of the concave and convex dies are curved, the distance between the forming surfaces and the heating plate is different, resulting in uneven heating of the forming surfaces and uneven heating of the glass. During the forming process, the force shifts to the position, and the part with a higher temperature deforms first and stretches as it is further heated, resulting in a thinner glass in that area. As a result, the final product has the problem of uneven thickness, such as CN114455818B. Summary of the Invention

[0005] One of the technical problems this application aims to solve is that uneven glass temperature during the 3D glass processing leads to poor glass quality.

[0006] To solve the above-mentioned technical problems, this application provides a glass hot bending mold and a glass hot bending method.

[0007] A glass hot bending mold according to this application includes: a first mold assembly having a first contoured surface and a first fixing groove, the first fixing groove being formed on the first mold assembly and having a predetermined distance between the first fixing groove and the first contoured surface; a second mold assembly having a second contoured surface and a second fixing groove, the second fixing groove being formed on the second mold assembly and having a predetermined distance between the second fixing groove and the second contoured surface; and a heating assembly comprising multiple heating assemblies, the multiple heating assemblies being respectively disposed in the first fixing groove and the second fixing groove.

[0008] In some embodiments, the first fixing groove includes multiple first fixing grooves, which are arranged parallel to each other, and the line connecting the multiple first fixing grooves is the same as the trend of the first contoured surface. The second fixing groove includes multiple second fixing grooves, which are arranged parallel to each other, and the line connecting the multiple second fixing grooves is the same as the trend of the second contoured surface. The heating assembly includes multiple heating structures, which are respectively disposed in the first fixing groove and the second fixing groove, and correspond one-to-one.

[0009] In some embodiments, the distance between adjacent first fixing slots at the location with larger curvature of the first contoured surface is less than the distance between adjacent first fixing slots at the location with smaller curvature of the first contoured surface, and the distance between adjacent second fixing slots at the location with larger curvature of the second contoured surface is less than the distance between adjacent second fixing slots at the location with smaller curvature of the second contoured surface.

[0010] In some embodiments, the glass hot bending mold further includes a third mold assembly having a plane, which together with the second contour surface forms a surface that conforms to the shape of the first contour surface.

[0011] In some embodiments, the first mold assembly includes limiting structures located on both sides of the first contour surface, and the second mold assembly includes a limiting segment whose projected width is less than the distance between the two limiting structures.

[0012] In some embodiments, the limiting structure has an opening corresponding to the second fixing groove.

[0013] According to another aspect of this application, a glass hot bending method is also provided, which employs the aforementioned glass hot bending mold and includes the following steps: Place the glass to be heated and bent onto the first mold assembly; The second mold assembly is pressed down close to the glass to be heated and bent until it comes into contact with the glass to be heated and bent. Preheat the glass to be bent. As the glass to be bent softens, observe its state, change the temperature of the heating component, and gradually press down the second mold component until the glass is formed. Annealing and cooling are performed on the glass.

[0014] In some embodiments, the temperature of the heating component is 550°C to 650°C during the molding process.

[0015] In some embodiments, the temperature of the heating component is 380°C to 480°C during the annealing process.

[0016] In some embodiments, cooling water is used to cool the first mold assembly and the second mold assembly.

[0017] Through the above technical solution, the glass hot bending mold provided in this application places the glass to be bent between the first mold assembly and the second mold assembly. Since the first fixing groove is formed on the first mold assembly and the second fixing groove is formed on the second mold assembly, the heating assembly is located inside the first and second mold assemblies, shortening the distance between the heating assembly and the first and second contoured surfaces. Furthermore, since this distance is a preset value, it ensures uniform heating of the first and second contoured surfaces, thereby ensuring uniform heating of the glass. The technical solution of this application effectively solves the problem of poor glass quality caused by uneven glass temperature during 3D glass processing in the prior art. Attached Figure Description

[0018] 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.

[0019] Figure 1 A schematic diagram of the structure of the glass hot bending mold disclosed in Embodiment 1 of this application is shown; Figure 2 It shows Figure 1 A schematic diagram of the structure of the second mold assembly of a glass hot bending mold; Figure 3 It shows Figure 1 A schematic diagram of the front sectional view of a glass hot bending mold; Figure 4 It shows Figure 1 A schematic diagram of the external structure of a glass hot bending mold; Figure 5 It shows Figure 1 A schematic diagram of the main structure of a glass hot bending mold; Figure 6 This paper shows a schematic diagram of the front cross-sectional structure of the glass hot bending mold before hot bending in the glass hot bending method disclosed in the embodiments of this application. Figure 7 It shows Figure 5 A schematic diagram of the front sectional structure of the glass hot bending mold after hot bending.

[0020] Explanation of reference numerals in the attached figures: 10. First mold assembly; 11. First contoured surface; 12. First fixing groove; 13. Limiting structure; 20. Second mold assembly; 21. Second contoured surface; 22. Second fixing groove; 23. Limiting segment; 30. Heating assembly; 31. Heating structure; 40. Third mold assembly; 41. Plane. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figures 1 to 5 As shown, the glass hot bending mold disclosed in Embodiment 1 of this application includes: a first mold assembly 10, a second mold assembly 20, and a heating assembly 30. The first mold assembly 10 has a first contouring surface 11 and a first fixing groove 12. The first fixing groove 12 is formed on the first mold assembly 10, and there is a predetermined distance between the first fixing groove 12 and the first contouring surface 11. The second mold assembly 20 has a second contouring surface 21 and a second fixing groove 22. The second fixing groove 22 is formed on the second mold assembly 20, and there is a predetermined distance between the second fixing groove 22 and the second contouring surface 21. The heating assembly 30 includes a plurality of heating assemblies, and the plurality of heating assemblies are respectively disposed in the first fixing groove 12 and the second fixing groove 22.

[0029] Applying the technical solution of Embodiment 1, the glass to be heated and bent is placed between the first mold assembly 10 and the second mold assembly 20. Since the first fixing groove 12 is formed on the first mold assembly 10 and the second fixing groove 22 is formed on the second mold assembly 20, the heating assembly 30 is disposed inside the first mold assembly 10 and the second mold assembly 20. This shortens the distance between the heating assembly 30 and the first contouring surface 11 and the second contouring surface 21. Furthermore, since this distance is a preset value, it ensures that the first contouring surface 11 and the second contouring surface 21 are heated uniformly, thereby ensuring uniform heating of the glass. The technical solution of Embodiment 1 effectively solves the problem of poor glass quality caused by uneven glass temperature during 3D glass processing in the prior art.

[0030] like Figures 1 to 5As shown, in the technical solution of Embodiment 1, the first fixing groove 12 includes multiple first fixing grooves 12, which are arranged parallel to each other. The line connecting the multiple first fixing grooves 12 follows the same trend as the first contoured surface 11. The second fixing groove 22 includes multiple second fixing grooves 22, which are arranged parallel to each other. The line connecting the multiple second fixing grooves 22 follows the same trend as the second contoured surface 21. The heating assembly 30 includes multiple heating structures 31, which are respectively disposed in the first fixing grooves 12 and the second fixing grooves 22, and correspond one-to-one. The heating structure 31 adopts a heating tube. The multiple first fixing grooves 12 and the multiple second fixing grooves 22 are opened according to the model of the heating tube. The size of the first fixing grooves 12 and the second fixing grooves 22 is larger than the size of the heating structure 31, which facilitates the insertion or removal of the heating structure 31, and at the same time reserves space for thermal expansion. The lines connecting the multiple first fixing slots 12 follow the same trend as the first contoured surface 11, and the lines connecting the multiple second fixing slots 22 follow the same trend as the second contoured surface 21. This ensures that the distance between each heating structure 31 and its corresponding first contoured surface 11 or second contoured surface 21 is consistent, further guaranteeing uniform temperature on the surfaces of the first contoured surface 11 and the second contoured surface 21. Since multiple first fixing slots 12 and multiple second fixing slots 22 are provided, if local temperature unevenness occurs on the first contoured surface 11 or the second contoured surface 21, the temperature of the heating structure 31 at the corresponding position can be adjusted without adjusting the temperature of all heating structures 31, allowing for more precise adjustment.

[0031] like Figures 1 to 5 As shown, in the technical solution of Embodiment 1, the glass hot bending mold further includes a third mold assembly 40. The third mold assembly 40 has a plane 41, which, together with the second contouring surface 21, forms a surface with the same shape as the first contouring surface 11. The third mold assembly 40 corresponds to the planar position of the 3D glass. It should be noted that this plane can be a horizontal plane or an inclined plane. The second contouring surface 21 corresponds to the curved position of the 3D glass. For the plane 41 position, since the product in this area is a flat surface, there is no need to set up an additional heating assembly 30 for reshaping. Similarly, the flat position corresponding to the first mold assembly 10 does not require an additional heating assembly. The setting of the third mold assembly 40 means that there is more than one mold corresponding to the first contouring surface 11, reducing the mass of a single mold and reducing the possibility of the glass being crushed.

[0032] It should be noted that if the 3D glass to be processed does not have a planar area, then there is no need to set up the third mold component 40. Only the first mold component 10 and the second mold component 20 need to be set up, and the first contour surface 11 and the second contour surface 21 have the same shape.

[0033] like Figure 1 , Figure 2 and Figure 4As shown, in the technical solution of Embodiment 1, the first mold assembly 10 includes a limiting structure 13 located on both sides of the first contour surface 11. The second mold assembly 20 includes a limiting segment 23, the projected width of which is less than the distance between the two limiting structures 13. The limiting structure 13 prevents the limiting segment 23 from swaying in the horizontal direction, thereby preventing the second mold assembly 20 from swaying in the horizontal direction, which would cause displacement between the second mold assembly 20 and the glass during the molding process, resulting in poor glass surface quality. The limiting structure 13 also includes a clamping segment, the projected width of which is greater than the distance between the two limiting structures 13, so as to facilitate clamping the second mold assembly using a clamping device to achieve steps such as mold closing and demolding.

[0034] like Figure 1 , Figure 4 and Figure 5 As shown, in the technical solution of Embodiment 1, the limiting structure 13 has an opening corresponding to the second fixing groove 22. If the heating structure 31 malfunctions during the hot bending process, the heating structure 31 can be removed from the second fixing groove 22 through the opening and replaced with a new heating structure 31. This process eliminates the need to open the molds of the first mold assembly 10 and the second mold assembly 20, thus avoiding the problem of glass scrapping.

[0035] The difference between the technical solution of Embodiment 2 and that of Embodiment 1 is that the distance between adjacent first fixing grooves 12 at locations with greater curvature of the first contoured surface 11 is smaller than the distance between adjacent first fixing grooves 12 at locations with less curvature of the first contoured surface 11, and the distance between adjacent second fixing grooves 22 at locations with greater curvature of the second contoured surface 21 is smaller than the distance between adjacent second fixing grooves 22 at locations with less curvature of the second contoured surface 21. In the technical solution of Embodiment 2, the heating structures 31 are densely distributed at locations with less curvature of the first contoured surface 11 and the second contoured surface 21, while they are sparsely distributed at locations with greater curvature of the first contoured surface 11 and the second contoured surface 21. Temperature unevenness is more likely to occur at locations with greater curvature; therefore, multiple heating structures 31 facilitate more precise adjustment of local temperatures. Temperature is more uniform at locations with less curvature; therefore, fewer heating structures can reduce the number of first fixing grooves 12 and second fixing grooves 22, reduce the number of heating structures 31, and lower costs.

[0036] The difference between the technical solution of Embodiment 3 and that of Embodiment 1 lies in the staggered arrangement of the vertical projection positions of the first fixing groove 12 and the second fixing groove 22. Specifically, the first fixing groove 12 is positioned between the gaps of two adjacent second fixing grooves 22, and the second fixing grooves 22 are positioned between the gaps of two adjacent first fixing grooves 12. This arrangement ensures more uniform heat radiation from the upper and lower heating structures 31 to the glass, a wider coverage area of ​​the heating structure 31, and more precise adjustment, which is beneficial for glass forming.

[0037] like Figure 6 and Figure 7 As shown, according to another aspect of this application, a glass hot bending method is also provided. The glass hot bending method uses the above-mentioned glass hot bending mold and includes the following steps: Place the glass to be heated and bent onto the first mold assembly 10; The second mold assembly 20 is pressed down close to the glass to be heated and bent until it comes into contact with the glass to be heated and bent. Preheat the glass to be bent. As the glass to be bent softens, observe its state, change the temperature of the heating component 30, and gradually press down the second mold component 20 until the glass is formed. Annealing and cooling are performed on the glass.

[0038] In the technical solution of this embodiment, after the glass is placed on the first mold assembly 10, if the 3D glass has a planar position, the third mold assembly 40 is first pressed down until it contacts the glass and applies a certain pressure. At this time, the third mold assembly 40 and the first mold assembly 10 jointly fix the glass, and the glass will not shift during the pressing of the second mold assembly 20. When the second mold assembly 20 is pressed down, multiple heating structures 31 are activated to heat the first contour surface 11 and the second contour surface 21, preheating the glass through thermal radiation and softening it. As the second mold assembly 20 is gradually pressed down, the temperature of each heating structure 31 is changed according to the state of the glass until the second mold assembly 20 is fully pressed down. After the glass is formed, it is annealed to reduce stress, and then cooled and demolded. In the above process, since multiple heating structures 31 are provided for the area of ​​the glass to be heated, it is convenient to heat the glass in sections, ensuring that the entire surface of the glass is heated evenly and reducing problems such as uneven thickness of the hot bending mold.

[0039] In the technical solution of this application embodiment, during the molding process, the temperature of the heating component 30 is 550°C to 650°C. During the preheating process, the flat area on the third mold component 40 and the corresponding first contour surface 11 does not need to be heated, ensuring that the glass in this area is in a relatively hard state, and the glass surface will not be subjected to pressure to produce defects such as mold marks and bumps. When the temperature of the curved area on the second contour surface 21 and the corresponding first contour surface 11 is 580°C to 680°C, the glass has a certain degree of softening. The second mold component 20 slowly descends under its own weight, making the glass in a semi-molded state. When the glass softens sufficiently and the molding range reaches the expected value, the temperature is adjusted to 550°C to 650°C and the second mold component 20 is pressed down, so that the second mold component 20 and the first mold component 10 are fully engaged, and the product is completely fitted to the first contour surface 11, the second contour surface 21 and the plane 41, completing the molding process.

[0040] In the technical solution of this application embodiment, during the annealing process, the temperature of the heating component 30 is 380°C to 480°C. During this process, the first mold component 10, the second mold component 20, and the third mold component 40 maintain pressure and slowly cool down, a process that lasts for 6 to 8 hours. This avoids the problem of excessive internal stress in the glass.

[0041] In the technical solution of this application embodiment, cooling water is used to cool the first mold assembly 10 and the second mold assembly 20. The cooling water rapidly cools the surfaces of the first mold assembly 10, the second mold assembly 20 and the third mold assembly 40 away from the glass, which facilitates the separation of the mold from the glass, achieves rapid demolding, and obtains the hot-bent glass.

[0042] In summary, the embodiments of this application provide a 3D glass hot bending process structure (glass hot bending mold), including: a lower mold (first mold assembly 10) with a concave mold cavity (first contour surface 11), the upper end of the mold cavity being open to place a glass blank, and the mold body having various slots (first fixing slots 12) matching heating tubes to insert heating tubes (heating structure 31) to achieve local heating effects in different areas. An upper mold (second mold assembly 20) is used to close the upper opening of the mold cavity, and the lower surface of the upper mold has a raised mold surface (second contour surface 21) adapted to the mold cavity. The glass blank can be placed in the mold cavity and located between the cavity surface of the upper mold and the cavity surface of the lower mold. When the upper mold and the lower mold are closed, the glass blank is heated and changes from a glassy state to a plastic state. The mold body has various slots (second fixing slots 22) matching heating tubes to insert heating tubes to achieve local heating effects in different areas, so that the glass blank is bent to the required curvature. By machining grooves within the upper and lower mold bodies to insert heating tubes, heat is conducted from the interior of the upper and lower molds to the 2D glass within the cavity as the temperature of the heating tubes in each area increases. The temperature of each heating tube is adjusted according to the bending curvature of different areas. This application adds heating tubes inside the upper and lower molds, places the 2D glass preform in the cavity of the lower mold, and then closes the upper mold. Low temperatures are applied to small curvature and flat areas, while high temperatures are applied to bending areas. The cavity surface of the upper mold moves towards the cavity of the lower mold. This positions the glass preform between the cavities of the upper and lower molds, achieving uniform heating of the entire glass surface while the glass preform is not fully softened. This reduces the internal regional stress changes in flat areas and small curvature areas caused by the weight of the upper mold, preventing the glass from being crushed by external forces. During the forming process, the temperature of the heating tubes in different areas can be adjusted to ensure uniform heating of the unformed glass preform, resulting in a smooth mold closing process. This ensures the 3D curved surface effect of the hot-bent glass, effectively reducing surface defects and thus enabling the hot bending of the glass. The upper and lower molds are made of commonly used graphite or high-temperature alloy materials, which can work for a long time in high-temperature environments. They possess high red hardness, wear resistance, excellent mechanical properties, and high-temperature oxidation resistance. Under high temperatures, they resist oxidation and do not shed powder, and have good surface smoothness after processing, making them ideal materials for glass hot bending molds. The heating tubes are preferably small-radius cylinders of the same material. Under the heating and baking action in different areas, the 2D glass gradually loses its supporting and load-bearing capacity for the upper mold. This avoids uneven heating between the upper and lower molds, which can cause glass slippage, and prevents the planar areas and small-arc areas of the compaction zone between the upper and lower molds from being overheated, resulting in surface indentations and mold marks. The main innovation of this application is the addition of heating tubes inside the upper and lower molds to achieve heating in different areas, ensuring that the glass maintains a uniform heating state throughout the forming process.The forming process is divided into a forming zone and a non-forming zone, with different temperatures directly controlled in each zone. The non-forming zone maintains a flat surface throughout the forming process, avoiding the high-temperature bending and flattening process of traditional methods. This significantly reduces hot bending defects and lessens the stretching deformation in the glass positioning area, resulting in higher dimensional accuracy after forming. This primarily solves the problems of difficult processing and low yield rates for large-size, high-curvature, automotive-grade curved glass.

[0043] 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.

[0044] 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. A glass hot bending mold, characterized in that, include: A first mold assembly (10) has a first contoured surface (11) and a first fixing groove (12). The first fixing groove (12) is formed on the first mold assembly (10), and there is a predetermined distance between the first fixing groove (12) and the first contoured surface (11). The second mold assembly (20) has a second contour surface (21) and a second fixing groove (22), the second fixing groove (22) is formed on the second mold assembly (20), and there is a predetermined distance between the second fixing groove (22) and the second contour surface (21); Heating components (30) include multiple heating components, which are respectively disposed in the first fixing groove (12) and the second fixing groove (22).

2. The glass hot bending mold according to claim 1, characterized in that, The first fixing groove (12) includes multiple first fixing grooves (12) arranged in parallel with each other, and the line connecting the multiple first fixing grooves (12) follows the same trend as the first contour surface (11). The second fixing groove (22) includes multiple second fixing grooves (22) arranged in parallel with each other, and the line connecting the multiple second fixing grooves (22) follows the same trend as the second contour surface (21). The heating component (30) includes multiple heating structures (31), and the multiple heating structures (31) are respectively arranged in the first fixing groove (12) and the second fixing groove (22), and correspond one to one.

3. The glass hot bending mold according to claim 2, characterized in that, The distance between adjacent first fixing grooves (12) at the position with larger curvature of the first contoured surface (11) is less than the distance between adjacent first fixing grooves (12) at the position with smaller curvature of the first contoured surface (11), and the distance between adjacent second fixing grooves (22) at the position with larger curvature of the second contoured surface (21) is less than the distance between adjacent second fixing grooves (22) at the position with smaller curvature of the second contoured surface (21).

4. The glass hot bending mold according to claim 1, characterized in that, The glass hot bending mold also includes a third mold assembly (40), which has a plane (41) and the second contour surface (21) together form a surface with the same shape as the first contour surface (11).

5. The glass hot bending mold according to claim 1, characterized in that, The first mold assembly (10) includes a limiting structure (13) located on both sides of the first contour surface (11), and the second mold assembly (20) includes a limiting segment (23) whose projected width is less than the distance between the two limiting structures (13).

6. The glass hot bending mold according to claim 5, characterized in that, The limiting structure (13) has an opening corresponding to the second fixing groove (22).

7. A method for hot bending glass, characterized in that, The glass hot bending method uses the glass hot bending mold according to any one of claims 1 to 6, and the glass hot bending method includes the following steps: Place the glass to be heated and bent on the first mold assembly (10); The second mold assembly (20) presses down close to the glass to be heated and bent until it comes into contact with the glass to be heated and bent; The glass to be bent is preheated. As the glass to be bent softens, observe its state, change the temperature of the heating component (30), and gradually press down the second mold component (20) until the glass is formed; The glass is then annealed and cooled.

8. The glass hot bending method according to claim 7, characterized in that, During the molding process, the temperature of the heating component (30) is 550°C to 650°C.

9. The glass hot bending method according to claim 7, characterized in that, During the annealing process, the temperature of the heating component (30) is 380°C to 480°C.

10. The glass hot bending method according to claim 7, characterized in that, The first mold assembly (10) and the second mold assembly (20) are cooled by cooling water.

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