Glass sheet stack structure for glass forming and method of forming same, ballistic-resistant glass

Abstract

The application provides a glass plate stacking structure for glass forming and a forming method thereof and a bulletproof glass, which comprises: flat glass plates, the glass plates are at least three and are stacked with each other, the size of each glass plate is sequentially increased or sequentially decreased according to the stacking direction, and there is a gap at the edge of adjacent glass plates; shielding layers, at least one shielding layer is arranged between adjacent glass plates, the shielding layer is arranged at least partially along the edge of the glass plate and covers the gap between the adjacent glass plates; and a gasket, the gasket is arranged between the shielding layer and the glass plate adjacent to the shielding layer, and the size of the gasket is greater than or equal to the size of the glass plate adjacent to the shielding layer. The shielding layer of the lower glass plate is prevented from being in direct contact with the upper glass plate, the gasket bears the pressure of the upper glass plate, and the integrity of the shielding layer on the lower glass plate is ensured; and when the gasket is removed after forming, the final product is formed without damaging the basic structure of the curved glass.

Description

Technical Field

[0001] This invention relates to the field of glass technology, and in particular to a glass plate stacking structure for glass forming and its forming method, as well as bulletproof glass. Background Technology

[0002] For multi-layered curved glass, the fit between single-piece curved glass is not as good as that of multiple pieces of glass stacked and simultaneously bent. During the simultaneous bending process, the lower edge of the upper glass sheet contacts the shielding layer of the lower glass sheet, and the small area of ​​the edge results in high pressure at the contact point. Under prolonged pressure, this leads to indentations in the glass shielding layer and light transmission from the back. To solve this problem, an ink primer needs to be applied to the defective areas of the glass-ceramic shielding layer. However, a color difference exists between the ink primer and the sintered shielding layer, severely affecting the overall appearance quality of the glass-ceramic shielding layer. Moreover, applying the primer is time-consuming and labor-intensive, and cannot fundamentally improve or solve the problem. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a glass plate stacking structure and its forming method for glass forming, bulletproof glass, to avoid indentation and back light transmission problems, and to improve the overall appearance quality of the glass ceramic shielding layer.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A glass sheet stacking structure for glass forming, comprising:

[0006] A flat glass plate, wherein there are at least three glass plates stacked on top of each other, and the size of each glass plate increases or decreases sequentially in the direction of stacking, and there is a stacking difference at the edges of adjacent glass plates;

[0007] A shielding layer, at least one of the shielding layers being disposed between adjacent glass panels, the shielding layer being disposed at least partially along the edge of the glass panel and covering the overlap between the adjacent glass panels;

[0008] A gasket is disposed between a shielding layer and a glass plate adjacent to the shielding layer, the size of which is greater than or equal to the size of the glass plate adjacent to the shielding layer.

[0009] In an alternative embodiment, the size of the gasket is greater than or equal to the size of the glass plate on which the shielding layer is located.

[0010] In an optional embodiment, the softening temperature of the gasket is the same as the softening temperature during glass plate forming.

[0011] In an optional embodiment, the gasket is made of the same material as the glass plate.

[0012] In an optional embodiment, the thickness of the gasket is 2.5mm-4.0mm.

[0013] In one alternative embodiment, the thickness of the glass plate is 2mm-20mm.

[0014] In an alternative implementation, the pad completely covers the shielding layer.

[0015] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows:

[0016] A glass forming method includes the following steps:

[0017] Obtain the glass plate stacking structure as described above for glass forming;

[0018] The glass plate stacking structure is bent and shaped.

[0019] The spacers in the stacked glass plate structure after molding are removed to obtain curved glass.

[0020] In an optional implementation, obtaining the glass plate stack structure includes the following steps:

[0021] Flat glass plates and gaskets are stacked alternately in sequence, wherein the size of the glass plates decreases sequentially in the direction of stacking.

[0022] In an optional implementation, obtaining the glass plate stack structure includes the following steps:

[0023] Spray a release powder between the glass plates and the surfaces in contact with each other, or between the glass plate and the gasket.

[0024] In an optional embodiment, bending the glass plate stack structure includes the following steps:

[0025] The glass plate stack structure is heated to a softening temperature and then bent under its own weight.

[0026] The curved glass plate stack structure is cooled to obtain the shaped glass plate stack structure.

[0027] In an optional embodiment, the glass plate stack structure is heated to a temperature of 500-700°C.

[0028] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows:

[0029] A bulletproof glass, comprising:

[0030] Curved glass, wherein there are at least three curved glass pieces stacked on top of each other, the size of each curved glass piece increases or decreases sequentially in the direction of stacking, and there is a stacking difference at the edges of adjacent curved glass pieces;

[0031] A shielding layer, at least one of the shielding layers being disposed between adjacent curved glass panes, the shielding layer being disposed at least partially along the edge of the curved glass panes and covering the overlap between the adjacent curved glass panes;

[0032] An adhesive layer is used to connect adjacent curved glass panes.

[0033] In an alternative embodiment, the surface of the shielding layer is free from molding indentations formed by the pressure of adjacent curved glass during the bending process.

[0034] The beneficial effects of this invention are as follows: by adding a spacer structure between glass plates with a shielding layer, the shielding layer of the lower glass can be isolated from the upper glass plate, avoiding direct contact between the shielding layer of the lower glass plate and the upper glass plate. This allows the pressure borne by the shielding layer during the glass plate forming process to be borne by the spacer, thereby ensuring the integrity of the shielding layer on the lower glass plate. Moreover, when the spacer is removed after forming, it does not affect the structure of the final curved glass, achieving the formation of the final product without damaging the basic structure of the glass plate. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a glass plate stacking structure for glass forming according to an embodiment of the present invention;

[0036] Figure 2 This is a flowchart illustrating the steps of a glass forming method according to an embodiment of the present invention;

[0037] Label Explanation:

[0038] 1. Glass plate; 101. First glass plate; 102. Second glass plate; 103. Third glass plate; 104. Fourth glass plate;

[0039] 2. Shielding layer; 201. First shielding layer; 202. Second shielding layer; 203. Third shielding layer; 204. Fourth shielding layer;

[0040] 3. Gaskets; 301. First gasket; 302. Second gasket; 303. Third gasket. Detailed Implementation

[0041] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0042] Currently, in some automotive bulletproof side door windows, the glass structure is multi-tiered to reduce damage caused by lifting or vibration. Simultaneously, to protect occupant privacy and enhance the vehicle's aesthetics, the bulletproof structure of automotive door windows often requires multiple layers of printed ceramic shielding, or even a completely printed ceramic shielding layer. Bulletproof glass is typically manufactured by bonding three or more panes of glass together with a transparent material. The glass portion requires pre-processing including cutting, printing, hot bending, and chemical tempering. In laminated glass, the ceramic shielding layer is usually placed between the glass panes and on the top pane, with the overlap between the glass panels being less than the width of the ceramic shielding layer. However, during the hot bending process, prolonged pressure on the glass panels can cause indentations in the ceramic shielding layer and light transmission from the back. This application provides a glass plate stacking structure for glass forming. By adding a spacer structure between glass plates with a shielding layer, the spacer will bear the pressure from the upper glass plate during the forming process, thereby ensuring the integrity of the shielding layer on the lower glass plate. At the same time, the spacer can be removed after forming, so as to form the final product without damaging the basic structure of the curved glass.

[0043] This application uses the production of bulletproof side door glass for automobiles as an example to introduce the glass plate stacking structure, glass forming method, and bulletproof glass used in this application. The glass plate stacking structure provided in this application is not only applicable to the production of bulletproof side door glass for automobiles, but also to the improvement of ceramic shielding layers in other multi-layered printed and stepped products. Specifically:

[0044] Please refer to Figure 1 A glass sheet stacking structure for glass forming, comprising:

[0045] A flat glass plate 1, comprising at least three glass plates 1 stacked on top of each other, wherein the dimensions of each glass plate 1 increase or decrease sequentially according to the stacking direction, and there is a stacking difference at the edges of adjacent glass plates 1; such as Figure 1As shown, the overlap difference (H) refers to the dimensional difference at the edges of adjacent glass plates 1 after two layers of glass plates 1 are stacked; the size range of the overlap difference is controlled within 150mm, and the preferred overlap difference range is 5mm-100mm; a shielding layer 2, at least one shielding layer 2 is disposed between adjacent glass plates 1, the shielding layer 2 is disposed at least partially along the edge of the glass plate 1 and covers the overlap difference between adjacent glass plates 1; a spacer 3, the spacer 3 is disposed between the shielding layer 2 and the glass plate 1 adjacent to the shielding layer 2, and the size of the spacer 3 is greater than or equal to the size of the glass plate 1 adjacent to the shielding layer 2. By adding a spacer 3 between the glass plates 1 with the shielding layer 2, the shielding layer 2 of the lower glass can be isolated from the upper glass plate 1, avoiding direct contact between the shielding layer 2 of the lower glass plate 1 and the upper glass plate 1. This allows the pressure borne by the shielding layer 2 during the glass plate 1 forming process to be borne by the spacer 3, thus ensuring the integrity of the shielding layer 2 on the lower glass plate 1. Moreover, when the spacer 3 is removed after forming, it can be removed without affecting the structure of the final curved glass, achieving the formation of the final product without damaging the basic structure of the curved glass.

[0046] In some embodiments, the size of the gasket 3 is greater than or equal to the size of the glass plate 1 on which the shielding layer 2 is located. In another alternative embodiment, the gasket 3 completely covers the shielding layer 2. By setting the size of the gasket 3 to be the same as or slightly larger than the size of the glass plate 1, the size of the gasket 3 is slightly larger than the size of the shielding layer 2. This not only increases the stress-bearing area of ​​the shielding layer 2, thus providing a buffering effect, but also ensures that the edge of the gasket 3 does not contact the shielding layer 2 on the glass, thereby preventing indentations and avoiding problems such as light transmission. The optimal size of the gasket 3 is the same as the size of the glass plate 1; the size of the gasket 3 is slightly larger than the shielding layer 2 to improve the reliability of the coverage. The increase in size is 0-2 mm larger on all four sides; if the size is too large, it is easy to cause over-processing problems.

[0047] In some embodiments, the softening temperature of the gasket 3 is the same as the softening temperature of the glass plate 1 during molding. By using a gasket 3 and a glass plate 1 with the same softening temperature, the glass plate 1 and the gasket 3 have the same softening point, thereby avoiding problems such as bulging and cracking during hot bending molding. In a further embodiment, the material of the gasket 3 is the same as that of the glass plate 1. By using a gasket 3 made of the same material as the glass plate 1, the gasket 3 and the glass plate 1 to be molded have the same characteristics, thereby avoiding problems such as bulging and cracking caused by inconsistencies in the softening point, heat absorption efficiency, and other characteristics between the glass plate 1 and the gasket 3 due to inconsistencies in their materials during hot bending molding.

[0048] In some embodiments, the thickness of the gasket 3 is 2.5mm-4.0mm. For example, the gasket 3 can be 2.5mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.5mm, 3.7mm or 4mm thick. If the thickness of the gasket 3 is less than 2.5mm, it is easy for the curvature of the gasket 3 to be mismatched with that of the glass plate 1 and other materials during the forming process, which may cause the gasket 3 to crack during the heating process. If the thickness of the gasket 3 is greater than 4mm, it will be difficult for the glass plate 1 to form a spherical surface, which will greatly increase the heating and forming time, resulting in low forming efficiency of the glass plate 1, which is not only time-consuming and labor-intensive, but also wasteful of resources.

[0049] In some embodiments, the thickness of the glass plate 1 is 2mm-20mm. In some embodiments, the thickness of the glass plate 1 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 12mm, 15mm, 20mm, etc. In some further embodiments, the thickness of the glass plate 1 ranges from 5mm to 15mm.

[0050] Please refer to Figure 2 Another embodiment of the present invention provides a glass forming method, comprising the following steps:

[0051] Obtain the glass plate stacking structure as described above for glass forming;

[0052] The glass plate stacking structure is bent and shaped;

[0053] The spacer 3 in the stacked glass plate structure after molding is removed to obtain curved glass.

[0054] As can be seen from the above description, by removing the gasket 3 after the glass plate stacking structure is bent and formed, the final product can be formed without affecting the final structure of the bent glass.

[0055] In some embodiments, obtaining a glass plate stack structure includes the following steps: alternately stacking flat glass plates 1 and spacers 3, wherein the size of the glass plates 1 decreases sequentially along the stacking direction. Because the size of the glass plates 1 decreases sequentially along the stacking direction, the bottom glass plate 1 has the largest size.

[0056] In some embodiments, obtaining a glass plate stack structure includes the following steps: spraying a release powder between the surfaces of glass plates 1 in contact with each other or between the surfaces of glass plates 1 and gasket 3 in contact with each other. By spraying the release powder, a uniform release layer can be formed between the surfaces of adjacent glass plates 1, allowing the stacked glass plates 1 to be separated after molding. The release powder is mainly composed of silicon powder.

[0057] In some embodiments, bending the glass plate stack structure includes the following steps: heating the glass plate stack structure to a softening temperature and bending it under its own weight; cooling the bent glass plate stack structure to obtain the final glass plate stack structure. The softened glass bending under its own weight allows for a more natural curved shape.

[0058] In some embodiments, the glass plate stack structure is heated to a temperature of 500-700°C. By softening the glass plate 1 at a temperature of 500-700°C, each layer of glass plate 1 can be effectively softened.

[0059] In some embodiments, a bulletproof glass is provided, comprising: at least three curved glass units stacked on top of each other, the dimensions of each curved glass unit increasing or decreasing sequentially in the stacking direction, and an overlap difference existing at the edges of adjacent curved glass units; a shielding layer 2, at least one shielding layer 2 disposed between adjacent curved glass units, the shielding layer 2 being disposed at least partially along the edges of the curved glass units and covering the overlap difference between adjacent curved glass units; and an adhesive layer, the adjacent curved glass units being connected by the adhesive layer. The surface of the shielding layer 2 is free from molding indentations formed by the pressure of adjacent curved glass units during the bending process. Because the surface of the shielding layer 2 is free of indentations, phenomena such as light transmission from the back can be avoided.

[0060] In some embodiments, bulletproof glass for automotive doors at BR6 (40mm thickness for BR6 bulletproof rating; 70mm thickness for BR7 bulletproof rating) or higher levels consists of at least four 8.0mm thick panes of glass. In other applications, it can also be formed by stacking three layers of glass. This embodiment uses a bulletproof glass composed of four 8.0mm thick panes as an example.

[0061] In some embodiments, please refer to Figure 1A glass plate stacking structure for glass forming is provided, comprising four flat glass plates 1, which are stacked from bottom to top, and the size of the glass plates 1 decreases sequentially from bottom to top, i.e., the area or edge width of the lower glass plate 1 is greater than that of the upper glass plate 1, as shown in the figure. The structure includes a first glass plate 101, a second glass plate 102, a third glass plate 103, and a fourth glass plate 104. A shielding layer 2 can be disposed on the surface of any one of the first glass plates 101, 102, and 103. In some embodiments, the shielding layer 2 can be disposed on the surfaces of all three glass plates simultaneously. Furthermore, in some further embodiments, the shielding layer 2 can also be disposed on the surface of the fourth glass plate 104, i.e., including a first shielding layer 201, a second shielding layer 202, a third shielding layer 203, and a fourth shielding layer 204.

[0062] Taking the example of a first shielding layer 201 disposed on the surface of a first glass plate 101, the structure of the shielding layer 2 will be described. The first shielding layer 201 is disposed at least partially along the edge of the first glass plate 101, and the first shielding layer 201 covers the overlap between the first glass plate 101 and the second glass plate 102, that is, the width of the first shielding layer 201 is at least equal to the width of the overlap of the first glass plate 101. Furthermore, the first shielding layer 201 may form a closed ring around the edge of the first glass plate 101, or it may not be disposed in certain portions of the edge of the first glass plate 101, or the first shielding layer 201 may not completely cover the overlap between the first glass plate 101 and the second glass plate 102 in certain portions; this application does not impose specific limitations on this. In some embodiments, the first shielding layer 201 completely covers the overlap range between the first glass plate 101 and the second glass plate 102.

[0063] Furthermore, in some embodiments, the first shielding layer 201 completely covers the first glass plate 101, in which case there is no transparent visible area on the glass plate stack structure.

[0064] In some embodiments, a transparent viewing area is retained on the glass plate stack structure. In this case, the first shielding layer 201 does not completely cover the first glass plate 101, and there is at least one viewing area on the first glass plate 101 that is not covered by the first shielding layer 201. Similarly, when shielding layers 2 are provided on the surfaces of the first glass plate 101, the second glass plate 102, the third glass plate 103, and the fourth glass plate 104, there are viewing areas on the first glass plate 101, the second glass plate 102, the third glass plate 103, and the fourth glass plate 104 that are not covered by the shielding layer 2, so that the entire glass plate stack structure has a transparent viewing area.

[0065] A gasket 3 is disposed between the shielding layer 2 and the glass plate 1 adjacent to the shielding layer 2. The size of the gasket 3 is greater than or equal to the size of the glass plate 1 adjacent to the shielding layer 2. Taking a first shielding layer 201 disposed on the surface of the first glass plate 101 as an example, the gasket 3 is disposed between the first shielding layer 201 of the first glass plate 101 and the second glass plate 102. If shielding layers 2 are disposed on the surfaces of the first glass plate 101, the second glass plate 102, the third glass plate 103, and the fourth glass plate 104, then a first gasket 301, a second gasket 302, and a third gasket 303 are disposed sequentially. The thickness of the gasket 3 is 2.5mm-4.0mm. For example, the thickness of the gasket 3 can be 2.5mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.5mm, 3.7mm, or 4mm. Meanwhile, the material of the gasket 3 is the same as that of the glass plate 1, that is, the softening temperature of the gasket 3 is the same as that of the glass plate 1 during molding. This causes problems such as bulging and cracking caused by the inconsistency in the softening point, heat absorption efficiency and other characteristics of the glass plate 1 and the gasket 3.

[0066] In some embodiments, please refer to Figure 2 A glass forming method includes the following steps:

[0067] S1. Obtain a glass plate stacking structure for glass forming as described in Embodiment 1; wherein, in an optional embodiment, the flat glass plate 1 and the spacer 3 can be stacked alternately in sequence; at the same time, the size of the glass plate 1 decreases sequentially in the stacking direction.

[0068] In a further embodiment, when stacking glass plate 1 and gasket 3, a separating powder is sprayed between the surfaces of glass plate 1 and glass plate 1 in contact or between the surfaces of glass plate 1 and gasket 3 in contact.

[0069] S2. Bend and shape the stacked glass plates into the desired shape, specifically:

[0070] A stacked glass structure is heated to a temperature of 500-700℃ until it reaches its softening temperature, and then bent under its own weight. The bent glass structure is then cooled to obtain the final glass structure. The softened glass bends under its own weight, forming a more natural curved shape.

[0071] S3. Remove the spacer 3 from the stacked glass plate structure after forming to obtain curved glass.

[0072] In some embodiments, a bulletproof glass includes: curved glass made by the steps of Embodiment 2, at least three curved glass panes stacked on top of each other, the dimensions of each curved glass pane increasing or decreasing sequentially in the stacking direction, and overlapping differences existing at the edges of adjacent curved glass panes; a shielding layer 2, at least one shielding layer 2 disposed between adjacent curved glass panes, the shielding layer 2 being disposed at least partially along the edges of the curved glass panes and covering the overlapping differences between adjacent curved glass panes; and an adhesive layer, the adjacent curved glass panes being connected by the adhesive layer. The surface of the shielding layer 2 is free from molding indentations formed by the pressure of adjacent curved glass panes during the bending process.

[0073] In summary, the glass plate stacking structure and forming method for glass forming, and bulletproof glass provided by the present invention, by adding a spacer structure between glass plates with shielding layers, not only can the shielding layer of the lower glass be isolated from the upper glass plate, avoiding direct contact between the shielding layer of the lower glass plate and the upper glass plate, but also the pressure borne by the shielding layer during the glass forming process can be transferred to the spacer, thereby ensuring the integrity of the shielding layer on the lower glass plate; moreover, when the spacer is removed after forming, it can be removed without affecting the structure of the final bent glass, achieving the formation of the final product without damaging the basic structure of the glass plate.

[0074] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A glass plate stacking structure for glass forming, characterized in that, include: A flat glass plate, wherein there are at least three glass plates stacked on top of each other, and the size of each glass plate increases or decreases sequentially in the direction of stacking, and there is a stacking difference at the edges of adjacent glass plates; A shielding layer, at least one of the shielding layers being disposed between adjacent glass panels, the shielding layer being disposed at least partially along the edge of the glass panel and covering the overlap between the adjacent glass panels; A gasket is disposed between a shielding layer and a glass plate adjacent to the shielding layer, the size of which is greater than or equal to the size of the glass plate adjacent to the shielding layer.

2. The glass plate stacking structure for glass forming according to claim 1, characterized in that, The size of the gasket is greater than or equal to the size of the glass plate on which the shielding layer is located.

3. The glass plate stacking structure for glass forming according to claim 1, characterized in that, The softening temperature of the gasket is the same as the softening temperature during glass plate forming.

4. The glass plate stacking structure for glass forming according to claim 1, characterized in that, The gasket is made of the same material as the glass plate.

5. A glass plate stacking structure for glass forming according to claim 1, characterized in that, The thickness of the gasket is 2.5mm-4.0mm.

6. A glass plate stacking structure for glass forming according to claim 1, characterized in that, The thickness of the glass plate is 2mm-20mm.

7. A glass plate stacking structure for glass forming according to claim 1, characterized in that, The pad completely covers the shielding layer.

8. A glass forming method, characterized in that, Includes the following steps: Obtain the glass plate stacking structure for glass forming as described in any one of claims 1-7; The glass plate stacking structure is bent and shaped. The spacers in the stacked glass plate structure after molding are removed to obtain curved glass.

9. A glass forming method according to claim 8, characterized in that, Obtaining the glass plate stack structure includes the following steps: Flat glass plates and gaskets are stacked alternately in sequence, wherein the size of the glass plates decreases sequentially in the direction of stacking.

10. A glass forming method according to claim 8 or 9, characterized in that, Obtaining the glass plate stack structure includes the following steps: Spray a release powder between the glass plates and the surfaces in contact with each other, or between the glass plate and the gasket.

11. A glass forming method according to claim 8, characterized in that, The process of bending and shaping the stacked glass plate structure includes the following steps: The glass plate stack structure is heated to a softening temperature and then bent under its own weight. The curved glass plate stack structure is cooled to obtain the shaped glass plate stack structure.

12. A glass forming method according to claim 11, characterized in that, The glass plate stacking structure is heated to a temperature of 500-700℃.

13. A bulletproof glass, characterized in that, include: Curved glass, wherein there are at least three curved glass pieces stacked on top of each other, the size of each curved glass piece increases or decreases sequentially in the direction of stacking, and there is a stacking difference at the edges of adjacent curved glass pieces; A shielding layer, at least one of the shielding layers being disposed between adjacent curved glass panes, the shielding layer being disposed at least partially along the edge of the curved glass panes and covering the overlap between the adjacent curved glass panes; An adhesive layer is used to connect adjacent curved glass panes.

14. The bulletproof glass according to claim 13, characterized in that, The surface of the shielding layer is free from molding indentations caused by the pressure of adjacent curved glass during the bending process.

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