Glass sheet forming mold and method, glass sheet forming apparatus

Abstract

The disclosure discloses a glass plate forming die and method and a glass plate forming device, comprising: an upper die having an upper forming surface, at least one blowing cavity and at least one upper suction cavity, the upper forming surface being provided with a blowing hole communicated with the blowing cavity and an upper suction hole communicated with the upper suction cavity; a first lower die having a first lower forming surface; a second lower die having a second lower forming surface and a lower suction cavity, the second lower forming surface being provided with a lower suction hole communicated with the lower suction cavity. By using the disclosure, the preliminary forming of the glass plate under the action of its own gravity can be realized first, and then the glass plate is transferred to the second lower forming surface, and the final forming of the glass plate is realized by using the suction effect of the lower suction cavity and the lower suction cavity and the blowing effect of the blowing cavity, so that the glass plate can be well attached to the upper forming surface and the second lower forming surface without flat-bottomed pan or S-shaped deformation, thus the simultaneous forming of multiple glass plates can be realized, and the forming precision is high and the forming stability is good.

Description

Glass plate forming mold and method, glass plate forming equipment

[0001] Related applications

[0002] This application claims priority to the Chinese invention patent application with application number 202311378302.8 filed on October 23, 2023, and cites the entire contents disclosed in the above patent application as part of this application. Technical Field

[0003] The present disclosure relates to the technical field of glass plate processing, and in particular, to a glass plate forming mold and method, and a glass plate forming device. Background Art

[0004] The front windshield is usually a laminated glass panel made of two or more glass panels bonded together with one or more layers of adhesive. The traditional laminated glass panel forming process is generally divided into two types:

[0005] One is self-weight forming, as shown in Figure 1. The forming process steps are as follows: multiple glass sheets are stacked together and placed on a forming mold that matches the final bending shape of the glass sheets. The forming mold is placed on a transport trolley. As the transport trolley is transported and moved in the bending furnace, the multiple glass sheets are heated by the heating furnace wire 7 above to at least their softening temperature. Under the action of their own gravity, they are bent into the final shape. Finally, the multiple glass sheets are sent to the lamination process for bonding. The advantage of this process is that the multiple glass sheets are formed synchronously, so the multiple glass sheets are well matched; the disadvantage is that the preset forming surface 8 of the glass sheet is a concave surface, but it is affected by the shape of the glass sheet, the mold and the distribution of gravity. For example, the first deformation 91 is generated by the influence of the mold support force, and the second deformation 92 is generated by the influence of gravity. This makes it very easy for the glass sheet to produce an actual forming surface 9 in the shape of a "pan" or "S".

[0006] The other method is single-piece press molding. The molding process involves heating and softening a single glass sheet in a furnace using ceramic rollers, then moving it to the forming section. Finally, the sheet is pressed together by the opposing forces of an upper punch and lower die. Finally, the multiple sheets that have completed the pressing process are placed together and bonded together. This process offers numerous advantages, including smooth surface transitions, minimal fluctuations, rapid production, and low cost. However, a disadvantage is that separate molding of multiple glass sheets can lead to poor matching, especially when the heat absorption characteristics of the glass sheets differ significantly.

[0007] Summary of the Invention

[0008] The purpose of the present disclosure is to provide a glass sheet forming mold and method, and a glass sheet forming device to solve the current technical problems of glass sheets.

[0009] The above-mentioned objectives of the present disclosure can be achieved by adopting the following technical solutions:

[0010] The present disclosure provides a glass plate forming mold, comprising: an upper mold, having an upper forming surface, at least one blowing cavity and at least one upper suction cavity, the upper forming surface being provided with a blowing hole connected to the blowing cavity and an upper suction hole connected to the upper suction cavity; a first lower mold, having a first lower forming surface; a second lower mold, having a second lower forming surface and a lower suction cavity, the second lower forming surface being provided with a lower suction hole connected to the lower suction cavity.

[0011] In the embodiment of the present disclosure, the glass plate forming mold has a first working state, a second working state and a third working state. In the first working state, the glass plate is placed on the first lower forming surface; in the second working state, the upper forming surface is at least partially in contact with the upper surface of the glass plate, and the upper suction cavity is in a suction state; in the third working state, the glass plate is placed on the second lower forming surface and is located below the upper forming surface, the upper suction cavity and the lower suction cavity are both in a suction state, and the blowing cavity is in a blowing state.

[0012] In an embodiment of the present disclosure, the upper molding surface includes a first upper molding surface, the first upper molding surface can be fitted with an edge area of ​​the upper surface of the glass plate, and the upper suction hole is provided on the first upper molding surface.

[0013] In an embodiment of the present disclosure, the upper molding surface also includes a second upper molding surface, which is located on the inner side of the first upper molding surface, and the blowing hole is provided on the second upper molding surface. The second upper molding surface is spaced apart from the upper surface of the glass plate so that the gap space between the second upper molding surface and the upper surface of the glass plate forms a blowing space.

[0014] In an embodiment of the present disclosure, a distance between the second upper forming surface and the upper surface of the glass plate is greater than 0 and does not exceed 200 mm.

[0015] In the embodiment of the present disclosure, the first lower molding surface is in contact with the edge area of ​​the preset molding lower surface of the glass plate, and a cavity is provided on the inner side of the first lower molding surface; the second lower molding surface can be in contact with the entire preset molding lower surface of the glass plate.

[0016] In an embodiment of the present disclosure, the upper mold also has a skirt structure, which has an external suction cavity. When the glass plate is in contact with the upper forming surface, the glass plate is at least partially located in the external suction cavity, so that the annular space between the skirt structure and the glass plate forms an external suction channel.

[0017] In an embodiment of the present disclosure, the distance between the bottom end of the skirt structure and the first upper forming surface is greater than 0 and does not exceed 100 mm.

[0018] In an embodiment of the present disclosure, there are two blowing cavities, the two blowing cavities include a first blowing cavity and a second blowing cavity, the multiple blowing holes include a plurality of first blowing holes and a plurality of second blowing holes, the plurality of first blowing holes are connected to the first blowing cavity and are located above the middle area of ​​the glass plate, and the plurality of second blowing holes are connected to the second blowing cavity and are located above the inner area of ​​the edge area of ​​the glass plate.

[0019] In an embodiment of the present disclosure, the preset deformation range of the middle area is greater than the preset deformation range of the inner area; the blowing pressure of the first blowing chamber is greater than the blowing pressure of the second blowing chamber; and / or the blowing time of the first blowing chamber is greater than the blowing time of the second blowing chamber; and / or the distribution density of the first blowing holes is greater than the distribution density of the second blowing holes.

[0020] In an embodiment of the present disclosure, the upper mold further comprises a shell and a sealing plate, wherein the upper surface of the shell is provided with a plurality of separated inner cavities and openings of each inner cavity, wherein the plurality of separated inner cavities constitute at least one upper suction cavity and at least one blowing cavity, and the sealing plate seals the openings;

[0021] The lower surface of the shell is provided with the upper forming surface;

[0022] Wherein, the skirt structure is integrally formed on the shell, and the air suction channel on the shell communicating with the external suction cavity constitutes the external suction channel; or,

[0023] The skirt structure is separately provided from the shell, and the skirt structure cover is provided outside the shell.

[0024] The present disclosure also provides a glass plate forming method, which uses the above-mentioned glass plate forming mold. The glass plate forming method includes the following steps: placing the glass plate on a first lower forming surface and heating it until the glass plate softens; the upper forming surface is attached to the glass plate, and the upper mold holds the glass plate under the suction action of the suction chamber and transfers the glass plate to the second lower forming surface; and the glass plate is finally formed by the upper mold and the second lower mold cooperating.

[0025] In the embodiment of the present disclosure, the final forming of the glass plate is carried out by cooperating with the upper mold and the second lower mold, including the following steps: the lower suction chamber and the upper suction chamber suck the glass plate through the lower suction hole and the upper suction hole, and the blowing chamber blows the glass plate through the blowing hole, thereby realizing the final forming of the glass plate; or in the process of the glass plate and the second lower molding surface being fitted together, the air between the glass plate and the second lower mold is sucked and discharged through the lower suction chamber until the glass plate and the second lower molding surface are fully fitted together; gas is injected into the lower suction chamber to convert the lower suction chamber into a lower blowing chamber, and at the same time, in cooperation with the suction effect of the upper suction chamber, the glass plate is finally formed under the action of vacuum suction from above and blowing from below.

[0026] In an embodiment of the present disclosure, the glass sheet forming method further includes: setting the number of blowing cavities, the distribution positions of the blowing cavities, the blowing pressure of the blowing cavities, and the blowing time of the blowing cavities according to the preset deformation ranges of multiple areas on the glass sheet.

[0027] In an embodiment of the present disclosure, the blowing time is 0.5 seconds to 5 seconds.

[0028] The present disclosure further provides a glass plate forming device, comprising a furnace body and the above-mentioned glass plate forming mold, wherein the glass plate forming mold can form the glass plate in the furnace body.

[0029] In an embodiment of the present disclosure, the glass sheet forming apparatus further includes a conveying mechanism, which can drive the first lower mold to move along a conveying direction within the furnace body.

[0030] In an embodiment of the present disclosure, the furnace body has a heating section, a forming section, an annealing section and a cooling section arranged along the conveying direction, and the upper mold and the second lower mold are arranged in the forming section.

[0031] In an embodiment of the present disclosure, the glass plate forming equipment also includes a driving mechanism, which includes a first driving structure and a second driving structure. The upper mold is installed in the furnace body through the first driving structure, and the second lower mold is installed in the furnace body through the second driving structure. The first driving structure can drive the upper mold to move in the vertical direction, and the second driving structure can drive the second lower mold to move in the horizontal direction.

[0032] In an embodiment of the present disclosure, the glass sheet forming equipment further includes a control mechanism, which includes at least one upper suction control structure, at least one lower suction control structure, at least one blowing control structure and a drive control structure, at least one upper suction control structure is connected to at least one upper suction chamber, at least one lower suction control structure is connected to at least one lower suction chamber, at least one blowing control structure is connected to at least one blowing chamber, and the drive control structure is connected to the drive mechanism.

[0033] The features and advantages of the present disclosure are:

[0034] By using the glass plate forming mold, method and glass plate forming equipment disclosed in the present invention, the glass plate can be first placed on the first lower forming surface of the first lower mold to be heated and softened, so as to achieve the initial forming of the glass plate under the action of its own gravity, and then the suction chamber of the upper mold can be used to suck and transfer the initially formed glass plate to the second lower forming surface of the second lower mold, so that the suction effect of the upper suction chamber and the lower suction chamber and the blowing effect of the blowing chamber can be simultaneously used to achieve the final forming of the glass plate, ensuring that the glass plate can fit well with the upper forming surface and the second lower forming surface without causing flat pan or S-shaped deformation. Therefore, when the glass plate is composed of two or more glass plates, multiple glass plates can be formed simultaneously with high forming accuracy and good forming stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] FIG1 is a schematic diagram of deformation of a glass plate during self-weight forming in the prior art.

[0037] FIG2 is a schematic structural diagram of a glass sheet forming mold in the present disclosure in a first working state.

[0038] FIG3 is a schematic structural diagram of the glass sheet forming mold in the present disclosure in the second working state.

[0039] FIG4 is a schematic structural diagram of the glass sheet forming mold in the present disclosure in a third working state.

[0040] FIG5 is a schematic structural diagram of the first lower mold in the present disclosure.

[0041] FIG6 is a schematic structural diagram of the upper surface of the second lower mold in the present disclosure.

[0042] FIG7 is a schematic structural diagram of the lower surface of the second lower mold in the present disclosure.

[0043] FIG8 is a schematic structural diagram of an upper mold in an embodiment of the present disclosure.

[0044] FIG9 is a schematic structural diagram of the lower surface of the upper mold in one embodiment of the present disclosure.

[0045] FIG10 is a schematic structural diagram of the upper surface of the housing in one embodiment of the present disclosure.

[0046] FIG. 11 is a flow chart of forming a glass sheet according to an embodiment of the present disclosure.

[0047] FIG12 is a schematic structural diagram of an upper mold in another embodiment of the present disclosure.

[0048] FIG13 is a schematic structural diagram of the lower surface of the upper mold in another embodiment of the present disclosure.

[0049] FIG14 is a schematic structural diagram of the upper surface of the housing in another embodiment of the present disclosure.

[0050] FIG. 15 is a flow chart of forming a glass sheet in another embodiment of the present disclosure. DETAILED DESCRIPTION

[0051] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0052] Implementation Method 1

[0053] As shown in Figures 2 to 4, the present disclosure provides a glass plate forming mold, including: an upper mold 1, having an upper forming surface 11, at least one blowing cavity 12 and at least one upper suction cavity 13, the upper forming surface 11 is provided with a blowing hole 14 connected to the blowing cavity 12 and an upper suction hole 15 connected to the upper suction cavity 13; a first lower mold 2, having a first lower forming surface 21; a second lower mold 3, having a second lower forming surface 31 and a lower suction cavity 32, the second lower forming surface 31 is provided with a lower suction hole connected to the lower suction cavity 32.

[0054] The glass sheet forming mold disclosed herein can form a variety of working states by utilizing the upper mold 1, the first lower mold 2, and the second lower mold 3. For example, in the embodiment disclosed herein, the glass sheet forming mold has a first working state, a second working state, and a third working state. In the first working state, the glass sheet 6 is placed on the first lower molding surface 21; in the second working state, the upper molding surface 11 is at least partially in contact with the glass sheet 6, and the upper suction chamber 13 is in a suction state; in the third working state, the glass sheet 6 is placed on the second lower molding surface 31 and is located below the upper molding surface 11. The upper suction chamber 13 and the lower suction chamber 32 are both in a suction state, and the blowing chamber 12 is in a blowing state. The glass sheet 6 can be a single glass sheet or can include two or more glass sheets stacked on top of each other.

[0055] By using the glass plate forming mold disclosed in the present invention, a first working state is first formed, that is, the glass plate 6 is first placed on the first lower forming surface 21 of the first lower mold 2 and heated and softened to achieve the initial forming of the glass plate 6 under the action of its own gravity, and then a second working state is formed, and the suction chamber of the upper mold 1 is used to suck and transfer the initially formed glass plate 6 to the second lower forming surface 31 of the second lower mold 3 to form a third working state, so that the suction effect of the lower suction chamber 32 and the upper suction chamber 13 and the blowing effect of the blowing chamber 12 can be simultaneously used to achieve the final forming of the glass plate 6, ensuring that the glass plate 6 can fit well with the upper forming surface 11 and the second lower forming surface 31 without causing flat pan or S-shaped deformation. Therefore, when the glass plate 6 is composed of two or more glass plates 6, multiple glass plates 6 can be formed simultaneously, and the forming accuracy is high and the forming stability is good.

[0056] As shown in conjunction with Figures 2 and 4 , the first lower molding surface 21 and the second lower molding surface 31 are designed based on the preset molding lower surface of the glass sheet 6, that is, the preset shape of the lower surface, so that the glass sheet 6 can achieve preliminary molding when attached to the first lower molding surface 21, and can achieve final molding when attached to the second lower molding surface 31, and the final molding lower surface is consistent with the preset molding lower surface. As shown in conjunction with Figure 3 , the upper molding surface 11 is designed based on the preset molding upper surface of the glass sheet 6, that is, the preset shape of the upper surface, so that the glass sheet 6 can be attached to the upper molding surface 11 and its final molding upper surface is consistent with the preset molding upper surface. In the embodiment of the present disclosure, the preset molding upper surface of the glass sheet 6 is generally a concave surface that is concave downward, and the preset molding lower surface of the glass sheet 6 is generally a convex surface that is convex downward.

[0057] It should be noted that in the embodiment of the present disclosure, the glass sheet 6 is divided into an edge region, a middle region, and an inner region. That is, based on the preset deformation ranges of different regions on the glass sheet 6, the region other than the edge region is divided into a middle region with a larger preset deformation range (i.e., a larger concave depth) and an inner region located between the middle region and the edge region, with a smaller preset deformation range (i.e., a smaller concave depth). This is shown in Figures 8 and 10 for details.

[0058] As shown in Figures 2 and 5 , in the embodiment of the present disclosure, the first lower molding surface 21 is aligned with the edge region of the lower surface of the glass sheet 6. A cavity 22 is provided inside the first lower molding surface 21. The first lower molding surface 21 supports the edge region of the glass sheet 6, while the inner and middle regions of the glass sheet 6 are suspended. Therefore, after the glass sheet 6 is softened by heat, the inner and middle regions of the glass sheet 6 can be depressed downward under the action of their own gravity, achieving initial molding. Specifically, the first lower molding surface 21 generally has an annular concave curved surface structure. The outer ring of the first lower molding surface 21 can extend within 5 mm of the outer contour of the glass sheet 6, or the outer ring of the first lower molding surface 21 can not extend beyond the outer contour of the glass sheet 6 and be within 20 mm of the outer contour of the glass sheet 6.

[0059] As shown in Figures 4, 6, and 7, the area of ​​the second lower molding surface 31 is greater than or equal to the area of ​​the preset molding lower surface of the glass sheet 6, so that the entire lower surface of the glass sheet 6 can be attached to the second lower molding surface 31, thereby ensuring that the final molding lower surface of the glass sheet 6 is consistent with the preset molding lower surface. Specifically, the lower suction chamber 32 can be connected to a vacuum pump via a lower suction control structure 54, and the suction force and suction time of the lower suction chamber 32 can be controlled by the lower suction control structure 54. The lower suction hole (not shown in the figure) is a through-hole structure opened in the second lower molding surface 31. Its specific structure and distribution characteristics can refer to the specific structure and distribution characteristics of the blowing hole 14 described below, and will not be described in detail here.

[0060] As shown in Figures 5, 6, and 7, in the embodiment of the present disclosure, the upper molding surface 11 includes a first upper molding surface 111. The first upper molding surface 111 is configured to conform to the edge region of the upper surface of the glass sheet 6, and the upper suction hole 15 is provided on the first upper molding surface 111. With the edge region of the glass sheet 6 supported and shaped by the first lower molding surface 21, the first upper molding surface 111 and the upper suction hole 15 provided on the first upper molding surface 111 can first press the glass sheet 6, thereby better conforming to the edge region of the upper surface of the glass sheet 6. This ensures that the glass sheet 6 can be stably held under the suction action of the upper suction chamber 13 for transfer. This also prevents deformation of the edge region of the glass sheet 6 during transfer, thereby improving the forming stability of the edge region of the glass sheet 6. Specifically, the upper suction chamber 13 is generally annular, corresponding to the predetermined shaped edge region of the glass sheet 6.

[0061] As shown in Figures 8 and 9, in the embodiment of the present disclosure, the upper molding surface 11 further includes a second upper molding surface 112, which is located on the inner side of the first upper molding surface 111. The blowing holes 14 are provided on the second upper molding surface 112. The second upper molding surface 112 is spaced apart from the upper surface of the glass sheet 6, so that the gap between the second upper molding surface 112 and the upper surface of the glass sheet 6 forms a blowing space 19. By providing the blowing space 19, the blowing gas can flow from the blowing cavity 12 through the blowing holes 14 into the blowing space 19 before blowing the glass sheet 6. This increases the contact area between the blowing gas and the glass sheet 6, thereby more evenly blowing the corresponding parts of the glass sheet 6.

[0062] Specifically, an excessively large blowing space 19 will affect the blowing effect. Therefore, the distance between the second upper molding surface 112 and the upper surface of the glass sheet 6 is, for example, greater than 0 and not more than 200 mm, and can be, for example, 200 mm, 180 mm, 160 mm, 140 mm, 120 mm, 100 mm, 80 mm, 60 mm, 40 mm, 20 mm, 10 mm, 5 mm, etc. The second upper molding surface 112 has the same shape as the inner area of ​​the pre-molded upper surface of the glass sheet 6.

[0063] As shown in Figures 8 and 9, in an embodiment of the present disclosure, the upper mold 1 further includes a skirt structure 16 having an external suction cavity 161. When the glass sheet 6 is in contact with the upper molding surface 11, the glass sheet 6 is at least partially located within the external suction cavity 161, forming an external suction channel 162 in the annular space between the skirt structure 16 and the glass sheet 6. The skirt structure 16 having the external suction cavity 161 forms an external suction channel 162 in the annular space between the skirt structure 16 and the glass sheet 6, providing additional suction to the glass sheet 6 and ensuring a more stable suction and preventing it from falling.

[0064] Specifically, to ensure the suction effect of the external suction channel 162, the distance between the bottom end of the skirt structure 16 and the first upper forming surface 111 is, for example, greater than 0 and not more than 100 mm, and can specifically be 100 mm, 90 mm, 80 mm, 70 mm, 60 mm, 50 mm, 40 mm, 30 mm, 20 mm, 10 mm, 5 mm, etc. This can prevent the suction force of the external suction channel 162 from being insufficiently applied to the glass sheet 6 due to an excessively large distance, and prevent the glass sheet 6 from protruding too far downward from the bottom end of the skirt structure 16 and being easily deformed due to a too small distance. The upper suction chamber 13 can be connected to a vacuum pump via the upper suction control structure 53, and the external suction chamber 161 can be connected to a vacuum pump via the external suction control structure 55, thereby controlling the suction parameters such as the suction force and suction time of the upper suction chamber 13 and the external suction chamber 161, respectively.

[0065] The number and distribution positions of the blowing cavities 12 are not specifically limited and can be arranged according to the preset deformation ranges of multiple locations on the glass plate 6 .

[0066] As shown in Figures 8 and 10 , in the embodiment of the present disclosure, based on the middle region of the glass sheet 6 and the inner region between the middle region and the edge region, there are two blowing chambers 12, including a first blowing chamber 121 and a second blowing chamber 122. The plurality of blowing holes 14 include a plurality of first blowing holes 141 and a plurality of second blowing holes 142 corresponding to the middle region of the glass sheet 6. The plurality of first blowing holes 141 are connected to the first blowing chamber 121 and are located above the middle region of the glass sheet 6. The plurality of second blowing holes 142 are connected to the second blowing chamber 122 and are located above the inner region of the glass sheet 6. By providing the first blowing chamber 121 and the second blowing chamber 122, respectively, different regions of the glass sheet 6 are blown, and the blowing time and force of different regions of the glass sheet 6 are controlled, so that the final formed upper surface of the glass sheet 6 conforms to the predetermined formed upper surface.

[0067] Specifically, the first blowing chamber 121 is generally a circular recessed cavity corresponding to the central area of ​​the glass sheet 6, with the center of the circular recessed cavity corresponding to the deepest point of the recessed surface of the pre-formed upper surface of the glass sheet 6. The first blowing chamber 121 can be connected to an air supply device via a first blowing control structure 51, and the second blowing chamber 122 can be connected to an air supply device via a second blowing control structure 52, thereby enabling control of the blowing pressure and blowing time of the first blowing chamber 121 and the second blowing chamber 122, respectively.

[0068] Furthermore, in this embodiment, the distribution density of the blow holes 14 corresponding to the multiple blow cavities 12, and / or the blowing pressure and / or blowing time of the multiple blow cavities 12, can also be controlled to ensure that the final formed upper surface of the glass sheet 6 conforms to the predetermined formed upper surface. For example, in the disclosed embodiment, the predetermined deformation range of the central region of the glass sheet 6 is greater than the predetermined deformation range of the inner region; the blowing pressure of the first blow cavity 121 is greater than the blowing pressure of the second blow cavity 122; and / or the blowing time of the first blow cavity 121 is greater than the blowing time of the second blow cavity 122; and / or the distribution density of the first blow holes 141 is greater than the distribution density of the second blow holes 142.

[0069] Because the design of the blowing chamber 12 corresponds to the curvature distribution of the glass sheet 6, the central region of the glass sheet 6 typically has a larger radius of curvature, where the center of gravity of the glass sheet 6 lies, requiring less blowing pressure. The edge regions of the glass sheet 6, on the other hand, typically have a smaller radius of curvature and are further from the center of gravity, making it more difficult for the edge regions of the glass sheet 6 to adhere to the second lower mold 3 under its own gravity. Therefore, a higher blowing pressure is required. Specifically, the central region of the glass sheet 6, with a radius of curvature exceeding 2000 mm, corresponds to the first blowing chamber 121. The shape and size of the first blowing chamber 121 can be customized and are not limited to the circular shape of this embodiment. The inner region of the glass sheet 6, with a radius of curvature below 2000 mm, corresponds to the second blowing chamber 122.

[0070] As shown in Figures 8 to 10, in some embodiments of the present disclosure, the upper mold 1 includes a shell 17 and a sealing plate 18. The shell 17 is a cast body. The upper surface of the shell 17 is provided with a plurality of separated inner cavities and openings of each inner cavity. The plurality of separated inner cavities constitute at least one upper suction chamber 13 and at least one blowing chamber 12. The sealing plate 18 seals the openings. The lower surface of the shell 17 constitutes the upper molding surface 11. The skirt structure 16 is generally a cover structure and is provided separately from the shell 17. The skirt structure 16 is provided outside the shell 17.

[0071] Specifically, one end of the upper suction control structure 53 extends through the skirt structure 16 into the outer suction chamber 161 and communicates with the upper suction chamber 13 through an interface on the sealing plate 18. One end of the first blow pressure control structure 51 extends through the skirt structure 16 into the outer suction chamber 161 and communicates with the first blow pressure chamber 121 through an interface on the sealing plate 18. One end of the second blow pressure control structure 52 extends through the skirt structure 16 into the outer suction chamber 161 and communicates with the second blow pressure chamber 122 through an interface on the sealing plate 18.

[0072] As shown in Figures 12 to 14, in other embodiments of the present disclosure, the upper mold 1' includes a shell 17' and a sealing plate 18, and a skirt structure 16' is integrally formed on the shell 17'. The upper surface of the shell 17' is provided with a plurality of separated inner cavities and openings of each inner cavity, and the plurality of separated inner cavities constitute an external suction chamber 161, at least one upper suction chamber 13 and at least one blowing chamber 12, and the sealing plate 18 seals the opening. The lower surface of the shell 17' is provided with an upper molding surface 11. The exhaust duct on the shell 17' that is connected to the external suction chamber 161 constitutes an external suction channel 162.

[0073] Specifically, one end of the upper suction control structure 53 extends through the skirt structure 16 into the outer suction chamber 161 and communicates with the upper suction chamber 13 through an interface on the sealing plate 18. One end of the first blow pressure control structure 51 extends through the skirt structure 16 into the outer suction chamber 161 and communicates with the first blow pressure chamber 121 through an interface on the sealing plate 18. One end of the second blow pressure control structure 52 extends through the skirt structure 16 into the outer suction chamber 161 and communicates with the second blow pressure chamber 122 through an interface on the sealing plate 18.

[0074] Implementation Method 2

[0075] As shown in Figures 2 to 4 , the present disclosure also provides a glass sheet forming method using a glass sheet forming mold. The glass sheet forming method includes the following steps: placing a glass sheet 6 on a first lower forming surface 21 and heating it until the glass sheet 6 softens; attaching an upper forming surface 11 to the glass sheet 6; the upper mold 1, under the suction action of a suction chamber, holds the glass sheet 6 and transfers it to a second lower forming surface 31; and finally forming the glass sheet 6 through the cooperation of the upper mold 1 and the second lower mold 3. The specific structure, operating principle, and beneficial effects of the glass sheet forming mold in this embodiment are the same as those of the glass sheet forming mold in Embodiment 1 and are not further described here.

[0076] As shown in Figure 11, in some embodiments of the present disclosure, the final forming of the glass plate 6 is performed by cooperating with the upper mold 1 and the second lower mold 3, including the following steps: the lower suction chamber 32 and the upper suction chamber 13 suck the glass plate 6 through the lower suction hole and the upper suction hole 15, and the blowing chamber 12 blows the glass plate 6 through the blowing hole 14, thereby achieving the final forming of the glass plate 6.

[0077] As shown in FIG15 , in some embodiments of the present disclosure, the final shaping of the glass sheet 6 is performed by cooperating with the upper mold 1′ and the second lower mold 3 , including the following steps: During the process of contacting the glass sheet 6 with the second lower molding surface 31 , the air between the glass sheet 6 and the second lower mold 3 is sucked and discharged through the lower suction chamber 32 until the glass sheet 6 is fully contacted with the second lower molding surface 31 ; gas is injected into the lower suction chamber 32 , converting the lower suction chamber 32 into a lower blowing chamber 32 ′. Simultaneously, the suction action of the upper suction chamber 13 is combined to achieve the final shaping of the glass sheet 6 through the action of vacuum suction from above and blowing pressure from below. After the glass sheet 6 is finally formed, it can be more easily separated from the second lower mold 3 .

[0078] In an embodiment of the present disclosure, the glass plate forming method further includes: setting the number of blowing cavities 12, the distribution positions of the blowing cavities 12, the blowing pressure of the blowing cavities 12, and the blowing time of the blowing cavities 12 according to the preset deformation ranges of multiple parts on the glass plate 6.

[0079] In an embodiment of the present disclosure, the blowing time is 0.5 seconds to 5 seconds.

[0080] Implementation Method 3

[0081] In conjunction with Figures 2 to 4 , to better implement the glass sheet forming method in Embodiment 2, the present disclosure further provides a glass sheet forming apparatus comprising a furnace body 4 and a glass sheet forming mold. The glass sheet forming mold is capable of forming a glass sheet 6 within the furnace body 4. The specific structure, operating principle, and beneficial effects of the glass sheet forming mold in this embodiment are the same as those of the glass sheet forming mold in Embodiment 1, and are not further described herein.

[0082] In an embodiment of the present disclosure, the glass sheet forming apparatus further comprises a conveying mechanism capable of driving the first lower mold 2 to move along a conveying direction within the furnace body 4. Specifically, the conveying mechanism comprises one or more transport carriages, on which one or more glass sheets 6 can be placed.

[0083] In the embodiment of the present disclosure, the furnace body 4 has a heating section, a forming section 41, an annealing section, and a cooling section arranged along the conveying direction. The upper mold 1 and the second lower mold 3 are disposed within the forming section 41. The conveying mechanism first drives the first lower mold 2 and the glass sheet 6 placed thereon to the heating section, where the glass sheet 6 is softened by heat and initially formed. The conveying mechanism then drives the first lower mold 2 to the forming section 41. The upper mold 1 then suction-holds the glass sheet 6 on the first lower mold 2 and transfers it to the second lower mold 3. The upper mold 1 then suction-holds the glass sheet 6 on the second lower mold 3 and transfers it to the first lower mold 2. The conveying mechanism then drives the first lower mold 2 to the annealing section and the cooling section, respectively, for annealing and cooling.

[0084] Specifically, the heating section is equipped with a heating wire, the annealing section is equipped with an annealing fan, and the cooling section is equipped with one or more cooling fans. The heating parameters for softening the glass sheet 6 in the heating section, the annealing parameters for annealing the formed glass sheet 6 in the annealing section, and the cooling parameters for cooling the annealed glass in the cooling section are the same as those in the prior art and will not be further described here.

[0085] In order to better transfer the glass plate 6, in the embodiment of the present disclosure, the glass plate forming equipment also includes a driving mechanism, the driving mechanism includes a first driving structure and a second driving structure, the upper mold 1 is installed in the furnace body 4 through the first driving structure, and the second lower mold 3 is installed in the furnace body 4 through the second driving structure. The first driving structure can drive the upper mold 1 to move in the vertical direction, and the second driving structure can drive the second lower mold 3 to move in the horizontal direction.

[0086] As shown in Figure 11, in some embodiments of the present disclosure, after the glass sheet 6 on the first lower mold 2 is softened and initially formed in the heating section, the conveying mechanism drives the first lower mold 2 to move to the bottom of the upper mold 1 in the forming section 41, and then the first driving structure drives the upper mold 1 to move downward to the first upper forming surface 111 to press the edge area of ​​the glass sheet 6 and hold the glass sheet 6. Then, the first driving structure drives the upper mold 1 to move upward to a height higher than the second lower mold 3, and then the second driving structure drives the second lower mold 3 to move horizontally to the bottom of the upper mold 1. Then, the first driving structure drives the upper mold 1 to move downward until the lower surface of the glass sheet 6 is in contact with the first lower forming surface 21 of the second lower mold 3, and then the upper mold 1 and the second lower mold 3 cooperate to finally form the glass sheet 6. After the glass sheet 6 is finally formed, the second driving structure drives the second lower mold 3 to move horizontally back to its initial position, and the first driving structure drives the upper mold 1 and the glass sheet 6 held by it to move downward until the lower surface of the glass sheet 6 is in contact with the first lower forming surface 21, and then moves upward back to its initial position after the upper mold 1 releases the glass sheet 6.

[0087] 15 , in some other embodiments of the present disclosure, when the upper mold 1′ moves downward until the lower surface of the glass plate 6 is in contact with the second lower molding surface 31 of the second lower mold 3, the air between the glass plate 6 and the second lower mold 3 is sucked and discharged through the lower suction chamber 32 of the second lower mold 3 until the glass plate 6 is fully in contact with the second lower molding surface 31 of the second lower mold 3; then, air is injected into the lower suction chamber 32 to convert the lower suction chamber 32 into a lower blowing chamber 32′, and at the same time, the suction effect of the upper suction chamber 13 of the upper mold 1′ is combined with the suction effect of the upper suction chamber 13 of the upper mold 1′ to achieve the final molding of the glass plate 6 under the action of upper vacuum suction and lower blowing, and the glass plate 6 can be better separated from the second lower mold 3 after final molding.

[0088] In an embodiment of the present disclosure, the glass sheet forming equipment also includes a control mechanism, which includes at least one upper suction control structure 53, at least one lower suction control structure 54, at least one blowing control structure and a drive control structure. The at least one upper suction control structure 53 is connected to at least one upper suction chamber 13, the at least one lower suction control structure 54 is connected to at least one lower suction chamber 32, the at least one blowing control structure is connected to at least one blowing chamber 12, and the drive control structure is connected to the drive mechanism.

[0089] The above are only several embodiments of the present disclosure. Those skilled in the art may make various changes or modifications to the embodiments of the present disclosure based on the contents disclosed in the application documents without departing from the spirit and scope of the present disclosure.

Claims

1. A glass plate forming mold, characterized in that: include: An upper mold, comprising an upper molding surface, at least one blowing cavity and at least one upper suction cavity, wherein the upper molding surface is provided with a blowing hole connected to the blowing cavity and an upper suction hole connected to the upper suction cavity; A first lower mold having a first lower molding surface; The second lower mold has a second lower molding surface and a lower suction cavity. The second lower molding surface is provided with a lower suction hole communicated with the lower suction cavity.

2. The glass sheet forming mold according to claim 1, characterized in that: The glass plate forming mold has a first working state, a second working state and a third working state. In the first working state, the glass plate is placed on the first lower forming surface; in the second working state, the upper forming surface is at least partially in contact with the upper surface of the glass plate, and the upper suction cavity is in a suction state; in the third working state, the glass plate is placed on the second lower forming surface and below the upper forming surface, the upper suction cavity and the lower suction cavity are both in a suction state, and the blowing cavity is in a blowing state.

3. The glass sheet forming mold according to claim 1, characterized in that: The upper molding surface comprises a first upper molding surface, the first upper molding surface can be fitted with an edge area of ​​the upper surface of the glass plate, and the upper suction hole is arranged on the first upper molding surface.

4. The glass sheet forming mold according to claim 3, characterized in that: The upper molding surface also includes a second upper molding surface, which is located on the inner side of the first upper molding surface. The blowing holes are arranged on the second upper molding surface. The second upper molding surface is spaced apart from the upper surface of the glass plate so that the gap between the second upper molding surface and the upper surface of the glass plate forms a blowing space.

5. The glass sheet forming mold according to claim 4, characterized in that: The distance between the second upper molding surface and the upper surface of the glass plate is greater than 0 and does not exceed 200 mm.

6. The glass sheet forming mold according to claim 1, characterized in that: The first lower molding surface is in contact with the edge area of ​​the preset molding lower surface of the glass plate, and a cavity is provided inside the first lower molding surface; the second lower molding surface can be in contact with the entire preset molding lower surface of the glass plate.

7. The glass sheet forming mold according to claim 1, characterized in that: The upper mold also has a skirt structure, which has an external suction cavity. When the glass plate is in contact with the upper molding surface, the glass plate is at least partially located in the external suction cavity, so that the annular space between the skirt structure and the glass plate forms an external suction channel.

8. The glass sheet forming mold according to claim 7, characterized in that: The distance between the bottom end of the skirt structure and the first upper forming surface is greater than 0 and does not exceed 100 mm.

9. The glass sheet forming mold according to claim 1, characterized in that: The number of the blowing cavities is two, the two blowing cavities include a first blowing cavity and a second blowing cavity, the multiple blowing holes include a plurality of first blowing holes and a plurality of second blowing holes, the plurality of first blowing holes are connected to the first blowing cavity and are located above the middle area of ​​the glass plate, and the plurality of second blowing holes are connected to the second blowing cavity and are located above the inner area of ​​the glass plate.

10. The glass sheet forming mold according to claim 9, characterized in that: The preset deformation range of the middle area is greater than the preset deformation range of the inner area; The blowing pressure of the first blowing chamber is greater than the blowing pressure of the second blowing chamber; and / or The blowing time of the first blowing chamber is greater than the blowing time of the second blowing chamber; and / or The distribution density of the first blowing holes is greater than the distribution density of the second blowing holes.

11. The glass sheet forming mold according to claim 7, characterized in that: The upper mold further comprises a shell and a sealing plate, wherein the upper surface of the shell is provided with a plurality of separated inner cavities and openings of each inner cavity, wherein the plurality of separated inner cavities constitute at least one upper suction cavity and at least one blowing cavity, and the sealing plate seals the openings; The lower surface of the shell is provided with the upper molding surface; Wherein, the skirt structure is integrally formed on the shell, and the air suction channel on the shell connected with the external suction chamber constitutes the external suction channel; or, The skirt structure is separately arranged from the shell, and the skirt structure is covered outside the shell.

12. A method for forming a glass sheet, characterized in that: Using the glass sheet forming mold according to any one of claims 1 to 11, the glass sheet forming method comprises the following steps: placing a glass sheet on the first lower forming surface and heating the glass sheet until the glass sheet softens; The upper molding surface is attached to the glass plate; The upper mold holds the glass plate under the suction action of the suction cavity and transfers the glass plate to the second lower molding surface; The glass plate is finally formed by the cooperation of the upper mold and the second lower mold.

13. The glass sheet forming method according to claim 12, characterized in that: The final forming of the glass sheet by the cooperation between the upper mold and the second lower mold comprises the following steps: The lower suction chamber and the upper suction chamber suck the glass sheet through the lower suction hole and the upper suction hole, and the blowing chamber blows the glass sheet through the blowing hole, thereby achieving final shaping of the glass sheet; or During the process of the glass plate being fitted to the second lower molding surface, the air between the glass plate and the second lower mold is sucked and discharged through the lower suction chamber until the glass plate is fully fitted to the second lower molding surface; Gas is injected into the lower suction chamber to convert the lower suction chamber into a lower blowing chamber. At the same time, the suction effect of the upper suction chamber is cooperated to achieve the final shaping of the glass sheet under the action of upper vacuum suction and lower blowing.

14. The glass sheet forming method according to claim 13, characterized in that: The glass sheet forming method further includes: setting the number of the blowing cavities, the distribution positions of the blowing cavities, the blowing pressure of the blowing cavities, and the blowing time of the blowing cavities according to preset deformation ranges of multiple areas on the glass sheet.

15. The glass sheet forming method according to claim 14, characterized in that: The blowing time is 0.5 seconds to 5 seconds.

16. A glass sheet forming device, characterized in that: The invention comprises a furnace body and a glass plate forming mold according to any one of claims 1 to 11, wherein the glass plate forming mold can form the glass plate in the furnace body.

17. The glass sheet forming apparatus according to claim 16, wherein: The glass sheet forming equipment further comprises a conveying mechanism, and the conveying mechanism can drive the first lower mold to move along a conveying direction in the furnace body.

18. The glass sheet forming apparatus according to claim 17, wherein: The furnace body has a heating section, a forming section, an annealing section and a cooling section arranged along the conveying direction, and the upper mold and the second lower mold are arranged in the forming section.

19. The glass sheet forming apparatus according to claim 16, wherein: The glass plate forming equipment also includes a driving mechanism, which includes a first driving structure and a second driving structure. The upper mold is installed in the furnace body through the first driving structure, and the second lower mold is installed in the furnace body through the second driving structure. The first driving structure can drive the upper mold to move in a vertical direction, and the second driving structure can drive the second lower mold to move in a horizontal direction.

20. The glass sheet forming apparatus according to claim 19, wherein: The glass sheet forming equipment also includes a control mechanism, which includes at least one upper suction control structure, at least one lower suction control structure, at least one blowing control structure and a driving control structure. At least one of the upper suction control structures is connected to at least one of the upper suction chambers, at least one of the lower suction control structures is connected to at least one of the lower suction chambers, at least one of the blowing control structures is connected to at least one of the blowing chambers, and the driving control structure is connected to the driving mechanism.

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