Manufacturing method of curved-surface composite board

Abstract

The invention relates to a manufacturing method of a curved-surface composite board, which comprises the following steps: after all layers of the curved-surface composite board are stacked and before cold drawing, applying an external force to the curved-surface composite board, so that the arch height of the curved-surface composite board is reduced to a preset range; then cold drawing is conducted on the curved-surface composite board with the arch height reduced to the preset range, and when the cold drawing time reaches the preset duration, external force is removed, so that shaping of the functional element is completed, the wrinkle defect generated by laminating and packaging of the functional element can be effectively reduced, and the product quality is improved. Particularly, the defect of wrinkles generated when functional elements of a large spherical curved surface composite board are laminated and packaged can be reduced, the production reliability and the yield can be greatly improved, the processing and production are simple, and the production efficiency is relatively high.

Description

Technical Field

[0001] The present application relates to the field of glass technology, and in particular to a method for manufacturing a curved composite panel. Background Art

[0002] Car windows are one of the important components of cars. To ensure the safety of car driving, car window glass is required to have safety performance parameters such as high strength and stiffness. Car window glass is usually designed as laminated glass, including two or more glass substrates and one or more functional elements arranged in the middle. Laminated glass has good safety and sound insulation. When used in car windows, it can be used as front windshield, rear windshield, side window glass, sunroof glass, etc.

[0003] The functional elements in the related art are bonded to the glass substrate through adhesive film to form a stable and reliable sandwich structure. The functional elements include but are not limited to dimming functional layers, display functional layers, etc., to achieve functions such as adjusting the change of glass light line of sight, display, etc. The outline size of the functional element is usually slightly larger than the outline size of the visible area of ​​the laminated glass and smaller than the outer outline size of the glass substrate. The black edge area of ​​the laminated glass needs to be manually cut with adhesive film to fill the thickness difference between the bottom adhesive film and the functional element, so as to avoid the laminated glass from cracking during the lamination process, and it is also conducive to the discharge of gas in the laminated glass.

[0004] Functional components, especially dimming functional layers, such as PDLC, SPD, LV or EC, have been widely used in composite board devices. However, when applied to curved composite boards, wrinkles of functional components are prone to occur during the assembly process. Specifically, two different directions perpendicular to each other on the curved composite board are selected. When the curvature of the curved composite board is greater, the arch height along the two different directions is greater than 30mm / M, or even greater than 35mm / M. The wrinkle defects of the functional components during assembly will be more obvious, and the production reliability and yield rate are low. There is currently no effective solution. Summary of the invention

[0005] Based on this, it is necessary to provide a method for manufacturing a curved composite board to address the problem of wrinkle defects caused by the assembly and packaging of functional components, so as to improve production reliability and yield.

[0006] A method for manufacturing a curved composite plate, the manufacturing method comprising:

[0007] Stacking the layers of a curved composite panel, wherein the curved composite panel comprises at least two sub-panels and a functional element disposed between two adjacent sub-panels;

[0008] Applying external force to the stacked curved composite plates so that the arch height of the curved composite plates is reduced to a preset range;

[0009] Cold drawing is performed on the edges of the curved composite plate whose arch height is reduced to a preset range;

[0010] When the cold drawing time of the curved composite plate reaches a preset time, the external force applied to the curved composite plate is removed.

[0011] In one of the embodiments, the curved composite panel is a spherical laminated glass; the arch height of the spherical laminated glass along the driving direction is defined as R1, and the unit of R1 is mm / M; the arch height of the spherical laminated glass along the direction perpendicular to the driving direction is defined as R2, and the unit of R2 is mm / M; when the arch height of the curved composite panel is within the preset range, 10mm / M≤R1≤30mm / M and 10mm / M≤R2≤30mm / M, or 10mm / M≤R1≤45mm / M and 10mm / M≤R2≤25mm / M.

[0012] In one embodiment, the preset duration is 10S~30S.

[0013] In one of the embodiments, the curved composite plate includes an outer convex surface and an inner concave surface arranged back to back, and the step of applying external force to the stacked curved composite plates specifically includes: applying a supporting force to the inner concave surface to support and position the curved composite plate, and applying a pressing force to the outer convex surface to make the outer convex surface bend and deform toward one side of the inner concave surface.

[0014] In one embodiment, the specific manner of applying the supporting force on the inner concave surface includes: using a plurality of supporting members to synchronously support a plurality of different parts of the inner concave surface respectively; and / or,

[0015] The specific manner of applying the pressing force on the outer convex surface includes: using a plurality of pressing members to simultaneously press a plurality of different parts of the outer convex surface respectively.

[0016] In one embodiment, a plurality of the support members are arranged at equal intervals around the center of the curved composite plate; and / or a plurality of the pressing members are arranged at equal intervals around the center of the curved composite plate.

[0017] In one embodiment, the distance between the support member and the center of the curved composite plate is greater than the distance between the pressing member and the center of the curved composite plate.

[0018] In one of the embodiments, after the step of stacking the layers of the curved composite plate and before the step of applying external force to the stacked curved composite plate, the step further includes: fitting a vacuum ring around the edges of the stacked curved composite plate.

[0019] In one of the embodiments, the stress σ of the curved composite plate is 20MPa≤σ≤60MPa.

[0020] In one embodiment, the manufacturing method further comprises the steps of:

[0021] After the external force applied to the curved composite plate is removed, the curved composite plate is kept cold-drawn until the cold-drawing time reaches a set time, and the cold-drawing is kept for 15 minutes to 120 minutes;

[0022] After the cold drawing is maintained for a set time, the curved composite plate is subjected to hot drawing;

[0023] The curved composite board after hot extraction is sent into an autoclave for lamination treatment.

[0024] The above-mentioned method for manufacturing the curved composite board, after stacking the layers of the curved composite board and before cold drawing, applies external force to the curved composite board so that the arch height of the curved composite board is reduced to a preset range; then the curved composite board with the arch height reduced to the preset range is cold drawn, and when the cold drawing time reaches a preset time, the external force is removed, thereby completing the shaping of the functional element, which can effectively reduce the wrinkle defects caused by the assembly and packaging of the functional element, especially the wrinkle defects caused by the assembly and packaging of the functional element of the large spherical curved composite board, can greatly improve the production reliability and yield rate, and has simple processing and production and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of a curved composite plate according to an embodiment of the present application.

[0026] Figure 2 The processing state of the curved composite plate of an embodiment of the present application is shown in FIG. Figure 1 .

[0027] Figure 3 The processing state of the curved composite plate of an embodiment of the present application is shown in FIG. Figure 2 .

[0028] Figure 4 The processing state of the curved composite plate of an embodiment of the present application is shown in FIG. Figure 3 .

[0029] Figure 5 The processing state of the curved composite plate of an embodiment of the present application is shown in FIG. Figure 4 .

[0030] Figure 6 FIG. 1 is a simplified schematic diagram of a curved composite plate according to an embodiment of the present application.

[0031] Figure 7 It is a simplified schematic diagram of a curved composite plate according to an embodiment of the present application.

[0032] 10. curved composite board; 11. sub-board; 12. adhesive layer; 13. functional element; 14. filling adhesive layer; 20. supporting member; 30. pressing member; 40. vacuum ring. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] It should be noted that the curved composite panel in this embodiment includes at least two sub-panels, and the number of sub-panels is, for example, 2, 3, 4 or more, which is not limited here. All sub-panels are stacked and combined together along their thickness direction. The curved composite panel also includes one or more layers of functional elements, and the functional elements are arranged between two adjacent sub-panels. The functional elements include but are not limited to dimming functional parts, display functional parts, etc., to achieve functions such as adjusting the glass light line of sight changes, display functions, etc.

[0035] Optionally, the dimming functional parts include but are not limited to LC (dye liquid crystal film) film, PDLC (polymer dispersed liquid crystal) film, GHLC (guest-host liquid crystal), PNLC (Polymer Network Liquid Crystal) functional elements, PSLC (polymer stabilized liquid crystal) film, PILC (pixel isolation liquid crystal) film, EC (electrochromic liquid crystal) film, SPD (suspended particle) film, projection film, touch film, etc., or a combination of two or more.

[0036] In addition, the curved composite board also includes an adhesive layer, which includes but is not limited to being made of PVB, EVA material, TPU material or SGP material. The adhesive layer is at least two layers. Optionally, the adhesive layer is, for example, arranged between two adjacent sub-boards to achieve bonding and fixing of the two adjacent sub-boards; the adhesive layer is, for example, arranged between the functional element and the sub-board to achieve bonding and fixing of the functional element and the sub-board; the adhesive layer is, for example, arranged between two adjacent functional elements to achieve bonding and fixing of the two functional elements.

[0037] When the curved composite board is provided with a layer of functional elements, the functional elements are connected between two adjacent sub-boards; when the curved composite board is provided with at least two layers of functional elements, the functions of the functional elements of each layer can be the same or different, and the specific functions can be flexibly adjusted and set according to actual needs. In addition, at least two layers of functional elements can be stacked and arranged in sequence and connected between two adjacent sub-boards, or can be arranged respectively between two adjacent sub-boards, or can adopt other stacking methods, which are not limited here.

[0038] It should be noted that, in order to facilitate the description and understanding of the present application, the curved composite plate will be specifically introduced by taking the functional element as one layer as an example, but this does not limit the number of layers of the functional element of the curved composite plate.

[0039] As an example, see Figure 1 , the curved composite panel 10, specifically for example, a laminated glass, comprises: two sub-panels 11, two adhesive layers 12 and a functional element 13. The two adhesive layers 12 are located between the two sub-panels 11. Optionally, of the two sub-panels 11, one sub-panel 11 is an outer panel facing the external environment, and the other sub-panel 11 is an inner panel facing the internal environment. The sub-panels 11 include but are not limited to light-transmitting substrates or opaque substrates, etc., and can be flexibly adjusted and set according to actual needs. When the curved composite panel 10 is a laminated glass and is applied to a vehicle, the external environment refers to the outside of the vehicle, and the internal environment refers to the inside of the vehicle. In addition, the functional element 13 is located between the two adhesive layers 12, and the functional element 13 includes but is not limited to a dimming functional component, a display functional component, etc., which are respectively connected to the two sub-panels 11 through two adhesive layers 12.

[0040] Please continue reading Figure 1 On the basis of the above-mentioned embodiment, the boundary of the functional element 13 is retracted relative to the sub-board 11. The space area of ​​the two sub-boards 11 corresponding to the functional element 13 is the edge filling area. The curved composite board 10 also includes a filling glue layer 14, and the filling glue layer 14 is filled in the edge filling area. In this way, the filling glue layer 14 can achieve precise edge filling, thereby effectively preventing bubbles from being generated in the edge filling area after the curved composite board 10 is processed.

[0041] It should be noted that the curved surface in the curved composite plate 10 in this embodiment refers to the overall plate surface of the curved composite plate 10 being set to a curved surface shape, specifically including but not limited to an arc surface or a spherical surface and the like.

[0042] The curved surface shape in this embodiment can be a so-called "single-curve" shape that forms a curvature by bending in any one direction, or a so-called "multi-curve" shape that forms a curvature by bending in any two orthogonal directions.

[0043] As an example, for a curved composite panel 10 with a single curved shape, the curved composite panel 10 can be bent toward the driving direction, that is, the left and right sides of the curved composite panel 10 are bent around the vertical axis, and the middle part of the curved composite panel 10 is away from the vertical axis; the curved composite panel 10 can also be bent in a direction orthogonal to the driving direction, that is, the upper and lower sides of the curved composite panel 10 are bent around the transverse axis, and the middle part of the curved composite panel 10 is also away from the vertical axis.

[0044] As an example, the multi-curved curved composite panel 10 is not only curved in the driving direction, but also curved in a direction perpendicular to the driving direction.

[0045] Among them, since the functional element 13 is arranged inside the curved composite plate 10, the functional element 13 is correspondingly set to a curved shape, and the curvature of the curved surface is set according to the process parameters of the curved composite plate 10, that is, the curvature of the corresponding parts of the surface of the functional element 13 and the surface of the curved composite plate 10 are completely consistent. Of course, processing errors within a preset range are also allowed.

[0046] For example, the curved composite plate 10 is specifically a spherical laminated glass, which is curved in the driving direction and in the direction orthogonal to the driving direction, that is, it has a height along the driving direction and perpendicular to the driving direction. The height of the spherical laminated glass along the driving direction is set to R1, that is, the ratio of the maximum bending depth per meter along the driving direction to 1 meter, and the unit of R1 is mm / m; the height of the spherical laminated glass along the direction perpendicular to the driving direction is defined as R2, that is, the ratio of the maximum bending depth per meter along the direction perpendicular to the driving direction to 1 meter, and the unit of R2 is mm / m.

[0047] Please note that Figure 6 , R1 can be obtained by including but not limited to the following methods, respectively selecting the midpoint A1 of the left side of the spherical laminated glass and the midpoint A2 of the right side of the spherical laminated glass, making a first straight line passing through point A1 and point A2, and a first arc line whose horizontal plane passing through point A1 and point A2 intersects the spherical laminated glass, and setting the maximum distance between the first straight line and the first arc line to d1, setting the distance between point A1 and point A2 to X, and R1=d1 / X.

[0048] Also, see Figure 7 , R2 can be obtained by including but not limited to the following methods, respectively selecting the midpoint B1 of the upper side of the spherical laminated glass and the midpoint B2 of the lower side of the spherical laminated glass, making a second straight line passing through point B1 and point B2, and a second arc line whose vertical plane passing through point B1 and point B2 intersects with the spherical laminated glass, and setting the maximum distance between the second straight line and the second arc line to d2, setting the distance between B1 and B2 to Y, and R2=d2 / Y.

[0049] After research, it is found that when the spherical laminated glass is a large spherical laminated glass, the wrinkle defect generated by the functional element 13 in the spherical laminated glass package will be more obvious, and the production reliability and yield rate will be lower. Among them, the large spherical laminated glass refers to the spherical laminated glass with R1≥35mm / M, R2≥35mm / M, or R1≥45mm / M, R2≥25mm / M.

[0050] See also Figures 1 to 5 , an embodiment of the present application provides a method for manufacturing a curved composite plate 10, the method for manufacturing the curved composite plate 10 comprising:

[0051] Step S100: stacking the layers of the curved composite board 10; optionally, refer to Figure 1 The curved composite panel 10 includes at least two sub-panels 11 and a functional element 13 disposed between two adjacent sub-panels 11;

[0052] Specifically, the curved composite plate 10 includes but is not limited to a large spherical interlayer film.

[0053] In step S100, refer to Figure 2 The specific stacking process of each layer of the curved composite plate 10 can refer to the stacking process in the prior art, which will not be described in detail here.

[0054] Step S200, see Figure 3 , applying an external force to the stacked curved composite panels 10 so that the arch height of the curved composite panels 10 is reduced to a preset range;

[0055] The preset range can be flexibly adjusted and set according to actual needs and is not limited here.

[0056] Step S300, cold drawing is performed on the edges of the curved composite plate 10 whose arch height is reduced to a preset range;

[0057] In order to improve the processing quality of the functional element 13 in the curved composite plate 10, when it is determined that the arch height of the curved composite plate 10 reaches a preset range, the curved composite plate 10 is immediately subjected to a cold drawing process. On the contrary, when the arch height of the curved composite plate 10 is not reduced to the preset range, the curved composite plate 10 is not subjected to a cold drawing process.

[0058] For example, cold extraction refers to an extraction process performed on the curved composite plate 10 at room temperature. Specifically, the working temperature is, for example, between 10° C. and 30° C., which can be flexibly adjusted according to actual needs.

[0059] Step S400, see Figure 4When the cold drawing time of the curved composite plate 10 reaches a preset time, the external force applied to the curved composite plate 10 is removed.

[0060] The preset duration can be flexibly adjusted and set according to actual needs and is not limited here.

[0061] For example, the preset time includes but is not limited to 10S to 30S, specifically 10S, 12S, 15S, 18S, 20S, 25S or 30S, etc. In this way, the functional element 13 is formed in the curved composite plate 10 after the spherical surface is reduced for 10S to 30S, and the shaping time is relatively long, which is conducive to preventing the functional element 13 from having wrinkle defects during the lamination process.

[0062] When the external force applied to the curved composite plate 10 is removed, the curved composite plate 10 can be restored to its original shape under the driving force of its own deformation stress, that is, restored to the shape before the external force was applied to the curved composite plate 10. Please refer to Figure 2 and Figure 5 , Figure 2 is the shape of the curved composite plate 10 before external force is applied, Figure 5 It is the shape of the curved composite plate 10 after the external force is removed.

[0063] In addition, after step S400, step S500 is also included. After the external force applied to the curved composite plate 10 is removed, the curved composite plate 10 is still cold-drawn until the cold-drawing time reaches a set time, and hot-drawing is performed, and the exhaust is stopped after the hot-drawing.

[0064] Optionally, the set duration includes but is not limited to 15 minutes to 120 minutes.

[0065] It can be seen that by setting steps S200 to S400 after step S100 and before step S500, the profile characteristics of the curved composite board 10 can be temporarily changed, and the shaping process of the functional element 13 in the curved composite board 10 before the lamination step is completed. In addition, after the functional element 13 in the curved composite board 10 is shaped, the external force applied to the curved composite board 10 is removed, and the processing can be carried out according to the existing processing method of the curved composite board 10.

[0066] The manufacturing method of the above-mentioned curved composite plate 10, after stacking the layers of the curved composite plate 10 and before cold drawing, applies external force to the curved composite plate 10, so that the arch height of the curved composite plate 10 is reduced to a preset range; then the curved composite plate 10 with the arch height reduced to the preset range is cold drawn, and when the cold drawing time reaches a preset time, the external force is removed, thereby completing the shaping of the functional element 13, which can effectively reduce the wrinkle defects caused by the assembly and packaging of the functional element 13 of the large spherical curved composite plate 10, especially the wrinkle defects caused by the assembly and packaging of the functional element 13 of the large spherical curved composite plate 10, which can greatly improve the production reliability and yield rate, and the processing and production are simple and the production efficiency is high.

[0067] Compared with the existing product processing methods, the manufacturing method of the present application optimizes the operating factors that affect the wrinkles of the functional element 13 during the assembly and packaging process of the functional element 13, and reduces the product defects of the wrinkles of the functional element 13 during the manufacturing process of the curved composite board 10. In addition, the present application can greatly improve the processing capacity limit of the original functional element 13 to meet all currently known products. At the same time, this processing method minimizes the damage to the functional element 13, improves the assembly production efficiency and yield rate, and also improves the reliability of the curved composite board 10 product.

[0068] On the basis of the above-mentioned embodiment, the curved composite panel 10 is a spherical laminated glass. When the arch height of the curved composite panel 10 is within the preset range, 10mm / M≤R1≤30mm / M, and 10mm / M≤R2≤30mm / M, or 10mm / M≤R1≤45mm / M, and 10mm / M≤R2≤25mm / M. With such a configuration, on the one hand, when R1>30mm / M, and R2>30mm / M, or when R1>45mm / M, and R2>25mm / M, the functional element 13 will produce wrinkle defects in the laminated package, and the wrinkle defects will become more obvious with the increase of the arch height; on the other hand, when R1<10mm / M, and R2<10mm / M, the curved composite panel 10 will be easily damaged by cracks due to the large deformation during the process of applying external force, and the product quality will be reduced.

[0069] That is, when 10mm / M≤R1≤30mm / M, and 10mm / M≤R2≤30mm / M, or, 10mm / M≤R1≤45mm / M, and 10mm / M≤R2≤25mm / M, the wrinkle defects caused by the combined packaging of the functional element 13 can be effectively reduced, and the curved composite board 10 can be prevented from being damaged due to excessive deformation, which can greatly improve the production reliability and yield rate, and the processing and production are simple and the production efficiency is high.

[0070] In a specific embodiment, when the arch height of the curved composite plate 10 is within the preset range, R1 is, for example, 10 mm / M, 15 mm / M, 20 mm / M, 25 mm / M or 30 mm / M, and R2 is, for example, 10 mm / M, 15 mm / M, 20 mm / M, 25 mm / M or 30 mm / M; or, R1 is, for example, 10 mm / M, 15 mm / M, 20 mm / M, 25 mm / M, 30 mm / M, 35 mm / M, 40 mm / M or 45 mm / M, and R2 is, for example, 10 mm / M, 15 mm / M, 20 mm / M or 25 mm / M.

[0071] The curved composite plate 10 includes an outer convex surface and an inner concave surface arranged in opposite directions. The step of applying an external force to the stacked curved composite plate 10 specifically includes: applying a supporting force to the inner concave surface to support and position the curved composite plate 10, and applying a pressing force to the outer convex surface to bend and deform the outer convex surface toward the inner concave surface. In this way, the pressing force acts on the outer convex surface, which can bend and deform the outer convex surface toward the inner concave surface, thereby reducing the arch height of the composite curved plate. In addition, by adjusting the size of the pressing force, the size of the arch height of the composite curved plate can be adjusted accordingly.

[0072] For example, a specific method of applying the supporting force on the inner concave surface includes: using a plurality of supporting members 20 to respectively and synchronously support a plurality of different parts of the inner concave surface.

[0073] It should be noted that the support member 20 includes but is not limited to a support block, a support column or a support rod, etc., and the specific structural form is not limited as long as it can support the curved composite plate 10.

[0074] In this way, on the one hand, multiple support members 20 respectively and synchronously support multiple different parts of the inner concave surface, so as to stably support the curved composite plate 10; on the other hand, when the clamping force acts on the outer convex surface, it is easy to achieve bending deformation of the outer convex surface toward the inner concave surface.

[0075] Furthermore, multiple support members 20 are arranged at equal intervals around the center of the curved composite plate 10, so that the support force borne by each part of the inner concave surface is more balanced, which is conducive to achieving stable support for the curved composite plate 10 and preventing damage to the curved composite plate 10 when it is bent and deformed.

[0076] Optionally, the number of the support members 20 includes but is not limited to 2, 3, 4, 5, 6, 8 or more. In this embodiment, the number of the support members 20 is specifically selected to be 3 to 5, which can satisfy the requirement of stably supporting the curved composite plate 10 while preventing the number of the support members 20 from being too large and being detrimental to the bending deformation effect of the curved composite plate 10.

[0077] For example, the specific manner of applying the pressing force on the outer convex surface includes: using a plurality of pressing members 30 to respectively and synchronously press a plurality of different portions of the outer convex surface.

[0078] It should be noted that the pressing member 30 includes but is not limited to a pressing block, a pressing column or a pressing rod, etc., and the specific structural form is not limited as long as it can play a pressing role on the curved composite plate 10.

[0079] In this way, the plurality of pressing members 30 respectively and synchronously press on a plurality of different positions of the outer convex surface, thereby facilitating the bending deformation of the outer convex surface toward the inner concave surface.

[0080] Furthermore, multiple clamping members 30 are arranged at equal intervals around the center of the curved composite plate 10, so that the clamping force borne by various parts of the outer convex surface is more balanced, thereby facilitating the bending deformation of the outer convex surface toward the inner concave surface and effectively preventing damage to the curved composite plate 10 during bending and deformation.

[0081] Optionally, the number of the pressing members 30 includes but is not limited to 2, 3, 4, 5, 6, 8 or more. In this embodiment, the number of the pressing members 30 is specifically selected to be 3 to 5.

[0082] For example, the distance between the support member 20 and the center of the curved composite plate 10 is greater than the distance between the pressing member 30 and the center of the curved composite plate 10. In this way, the support position of the support member 20 on the inner concave surface is further away from the center of the curved composite plate 10 than the pressing position of the pressing member 30 on the outer convex surface, so that when the pressing member 30 presses the outer convex surface, it is easy to realize the bending deformation of the outer convex surface toward the inner concave surface, thereby reducing the arch height of the curved composite plate 10 to a preset range.

[0083] For example, the distance between the position where the pressing member 30 presses against the outer convex surface and the center of the curved composite board 10 includes, but is not limited to, 200 mm to 250 mm, specifically, 200 mm, 210 mm, 220 mm, 230 mm, 240 mm, or 250 mm, etc. The position where the support member 20 supports the inner concave surface is offset outward relative to the position where the pressing member 30 presses against the outer convex surface, including, but not limited to, 150 mm to 200 mm, specifically, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, or 200 mm, etc.

[0084] In a specific example, the clamping members 30 are, for example, four and are arranged at equal intervals around the center of the curved composite plate 10, and the distance between the position where the clamping members 30 press against the outer convex surface and the center of the curved composite plate 10 is 200 mm to 250 mm. In addition, the supporting members 20 are, for example, four and are arranged at equal intervals around the center of the curved composite plate 10, and the position where the supporting members 20 support the inner concave surface is offset outward by 150 mm to 200 mm relative to the position where the clamping members 30 press against the outer convex surface.

[0085] For example, after the step of stacking the layers of the curved composite board 10 and before the step of applying external force to the stacked curved composite board 10, step S120 is also included: a vacuum ring 40 is mounted on the edges of the curved composite board 10 after stacking. Specifically, in this step, the vacuum ring 40 is not evacuated or the absolute value of the negative pressure of the vacuum ring 40 is ≤ 20% of the absolute value of the negative pressure during cold drawing, that is, much smaller than the negative pressure during cold drawing, so that it is not enough to affect the functional element 13. In this way, since the vacuum ring 40 has been mounted on the edges of the curved composite board 10 before the step of applying external force to the curved composite board 10, when the arch height of the curved composite board 10 is reduced to a preset range, the curved composite board 10 can be immediately cold drawn by the vacuum ring 40, that is, the starting point of the cold drawing is at the moment when the arch height of the curved composite board 10 is reduced to a preset range, so that it can be beneficial to reduce the wrinkle defects caused by the chip packaging of the functional element 13.

[0086] For example, the absolute value of the negative pressure of the vacuum ring 40 during cold pumping includes but is not limited to ≥0.093 MPa. The negative pressure of the vacuum ring 40 during cold pumping is specifically, for example, negative 0.093 MPa, negative 0.095 MPa, negative 0.098 MPa or negative 0.1 MPa, etc.

[0087] For example, the stress σ of the curved composite plate 10 is 20 MPa≤σ≤60 MPa.

[0088] Optionally, σ includes but is not limited to 20 MPa, 25 MPa, 30 MPa, 35 MPa, 40 MPa, 45 MPa, 50 MPa, 55 MPa or 60 MPa, etc.

[0089] For example, the manufacturing method further includes:

[0090] Step S600, maintaining the vacuum state, and performing heat vacuuming on the curved composite plate 10;

[0091] Thus, after cold drawing, the surface of the curved composite board 10 is gradually heated to, for example, 100° C. to 110° C., so that the filling adhesive layer 14 located around the edge of the curved composite board 10 is heated and bonded to the sub-board 11, thereby playing an edge sealing role.

[0092] Step S700: sending the hot-extracted curved composite board 10 into an autoclave for lamination treatment.

[0093] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0094] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0095] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A method for manufacturing a curved composite panel, characterized in that: The manufacturing method comprises: Stacking the layers of a curved composite panel, wherein the curved composite panel comprises at least two sub-panels and a functional element disposed between two adjacent sub-panels; Applying external force to the stacked curved composite plates so that the arch height of the curved composite plates is reduced to a preset range; Cold drawing is performed on the edges of the curved composite plate whose arch height is reduced to a preset range; When the cold drawing time of the curved composite plate reaches a preset time, the external force applied to the curved composite plate is removed.

2. The method for manufacturing a curved composite panel according to claim 1, characterized in that: The curved composite panel is a spherical laminated glass; the arch height of the spherical laminated glass along the driving direction is defined as R1, and the unit of R1 is mm / M; the arch height of the spherical laminated glass in a direction perpendicular to the driving direction is defined as R2, and the unit of R2 is mm / M; when the arch height of the curved composite panel is within the preset range, 10mm / M≤R1≤30mm / M and 10mm / M≤R2≤30mm / M, or 10mm / M≤R1≤45mm / M and 10mm / M≤R2≤25mm / M.

3. The method for manufacturing a curved composite panel according to claim 1, characterized in that: The preset duration is 10S~30S.

4. The method for manufacturing a curved composite panel according to claim 1, characterized in that: The curved composite plate includes an outer convex surface and an inner concave surface arranged back to back, and the step of applying external force to the stacked curved composite plates specifically includes: applying a supporting force to the inner concave surface to support and position the curved composite plate, and applying a pressing force to the outer convex surface to make the outer convex surface bend and deform toward one side of the inner concave surface.

5. The method for manufacturing a curved composite panel according to claim 4, characterized in that: The specific method of applying the supporting force on the inner concave surface includes: using multiple supporting members to synchronously support multiple different parts of the inner concave surface respectively; and / or, The specific manner of applying the pressing force on the outer convex surface includes: using a plurality of pressing members to simultaneously press a plurality of different parts of the outer convex surface respectively.

6. The method for manufacturing a curved composite panel according to claim 5, characterized in that: The plurality of support members are arranged at equal intervals around the center of the curved composite plate; and / or the plurality of pressing members are arranged at equal intervals around the center of the curved composite plate.

7. The method for manufacturing a curved composite panel according to claim 5, characterized in that: The distance between the support member and the center of the curved composite plate is greater than the distance between the pressing member and the center of the curved composite plate.

8. The method for manufacturing a curved composite panel according to claim 1, characterized in that: After the step of stacking the layers of the curved composite board and before the step of applying external force to the stacked curved composite board, the step further includes: fitting vacuum rings around the edges of the stacked curved composite board.

9. The method for manufacturing a curved composite panel according to claim 1, characterized in that: The stress σ of the curved composite plate is 20MPa≤σ≤60MPa.

10. The method for manufacturing a curved composite panel according to any one of claims 1 to 9, characterized in that: The manufacturing method further comprises the steps of: After the external force applied to the curved composite plate is removed, the curved composite plate is kept cold-drawn until the cold-drawing time reaches a set time, and the cold-drawing is kept for 15 minutes to 120 minutes; After the cold drawing is maintained for a set time, the curved composite plate is subjected to hot drawing; The curved composite board after hot extraction is sent into an autoclave for lamination treatment.

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