Glass cover plate and its forming process

Abstract

This application discloses a glass cover plate and its forming process. The glass cover plate includes a cover plate body and a cover plate side wall. A glass protrusion is provided on the top of the cover plate body, and a camera hole is reserved on the glass protrusion. The cover plate side wall is arranged on the periphery of the cover plate body in a manner of being integrally formed with the cover plate body and bends a predetermined angle in a direction away from the glass protrusion. A fan-shaped strengthening structure is integrally arranged at the bending joint of the cover plate body and the cover plate side wall, and the fan-shaped protrusion part of the fan-shaped strengthening structure is located at the middle position between the cover plate body and the cover plate side wall. The glass cover plate and its forming process provided by this application can, on the basis of meeting the lightweight requirements of the glass cover plate, effectively reduce the breakage and loss rate of the glass cover plate, save resources, and reduce manufacturing and use costs.

Description

Technical Field

[0001] The present invention relates to the technical field of glass covers, and particularly to a glass cover and its forming process. Background Art

[0002] Generally, a glass cover includes a cover side wall and a cover body. At the same time, a glass protrusion is provided on the top of the cover body for processing or reserving a camera hole to install a rear camera. In addition, the cover side wall is arranged on the periphery of the cover body.

[0003] Generally, the connection between the cover side wall and the cover body is relatively thin. During the early processing or later use, the problem of the cover side wall breaking is likely to occur, and the loss and scrapping rate is relatively high. This not only wastes resources but also greatly limits the profit space of the glass cover. Summary of the Invention

[0004] One advantage of the present invention is to provide a glass cover and its forming process. By integrally forming a fan-shaped strengthening structure on the inner side of the connection position between the cover side wall and the cover body, the connection strength between the cover side wall and the cover body can be effectively improved, making the cover side wall not easily break. Furthermore, the quality of the glass cover can be improved, the loss and scrapping rate of the glass cover can be greatly reduced, resources and manufacturing costs can be saved, and at the same time, it will not increase much weight to the glass cover, meeting the lightweight requirement of the glass cover.

[0005] To achieve at least one of the above advantages of the present invention, the present invention provides a glass cover, including a cover body and a cover side wall. A glass protrusion is provided on the top of the cover body, and a camera hole is reserved on the glass protrusion. The cover side wall is arranged on the periphery of the cover body in a manner of being integrally formed with the cover body and bends a predetermined angle in a direction away from the glass protrusion. A fan-shaped strengthening structure is integrally provided at the bending joint of the cover body and the cover side wall, and the fan-shaped protrusion part of the fan-shaped strengthening structure is located at the middle position between the cover body and the cover side wall.

[0006] According to an embodiment of the present invention, the height of the glass protrusion is 0.2 mm to 2 mm.

[0007] According to an embodiment of the present invention, the radius of the fan-shaped curved surface of the fan-shaped strengthening structure is 0.5 mm to 3 mm.

[0008] In a second aspect, the present application also provides a glass cover forming process, which sequentially includes the following steps:

[0009] S11, Hot pressing forming: Hot press the 2D flat glass along a predetermined annular position to form a special-shaped glass with a fan-shaped protrusion. The predetermined annular position is the connection position between the cover body and the cover side wall of the glass cover plate. The fan-shaped protrusion extends perpendicularly from the cover body towards the same side direction, and a fan-shaped groove is correspondingly formed on the other side opposite to the cover body;

[0010] S12, Cut off the side of the cover body with the fan-shaped groove, and reserve a glass protrusion for forming a camera hole. The fan-shaped groove is completely cut off, so that the other side of the cover body is a smooth surface;

[0011] S13, Open a camera hole at the glass protrusion;

[0012] S14, Hot bending forming: Hot bend the cover side wall so that the cover side wall bends away from the glass protrusion from the cover body. The hot bending position is a region symmetrically extending 1 mm to 3 mm on both sides with the center point of the fan-shaped protrusion as the reference.

[0013] According to an embodiment of the present invention, in step S11, the hot pressing temperature for hot pressing forming is 600 - 1000 °C, the hot pressing pressure is 0.2 - 0.3 MPa, and the hot pressing time is 2 - 3 min.

[0014] According to an embodiment of the present invention, in step S12, the protruding height of the glass protrusion is greater than or equal to the maximum depression depth of the fan-shaped groove.

[0015] According to an embodiment of the present invention, in step S14, the hot bending temperature for hot bending forming is 1000 - 1300 °C, and the hot bending pressure is 0.7 - 1.2 MPa.

[0016] In a third aspect, the present application also provides a glass cover plate forming process, which sequentially includes the following steps:

[0017] S21, Hot pressing forming: Hot press the 2D flat glass along a predetermined annular position to form a special-shaped glass with a fan-shaped protrusion. The predetermined annular position is the connection position between the cover body and the cover side wall of the glass cover plate. The fan-shaped protrusion extends perpendicularly from the cover body towards the same side direction, and a fan-shaped groove is correspondingly formed on the other side opposite to the cover body. Hot press the 2D flat glass synchronously or asynchronously, so that a glass protrusion for forming a camera hole is formed on the surface of the 2D flat glass with the fan-shaped groove. A glass protrusion groove is formed on the other side opposite to the glass protrusion;

[0018] S22. One-time hot bending forming. Hot bend the side wall of the cover plate so that the side wall of the cover plate bends away from the glass convex groove from the cover plate body, wherein the bending position is 0 to 3 mm inside the fan-shaped protrusion, and after the one-time hot bending forming, the lowest point of the fan-shaped protrusion is not lower than the bottom position of the glass convex groove;

[0019] S23. Cut off the redundant part of the cover plate body based on the bottom of the glass convex groove;

[0020] S24. Hot press and flatten the 2D flat glass;

[0021] S25. Cut off a predetermined thickness of the outer part of the fan-shaped groove so that the thickness of the side wall of the cover plate is equal to the thickness of the cover plate body;

[0022] S26. Two-time hot bending forming. Hot bend the side wall of the cover plate so that the side wall of the cover plate bends away from the glass protrusion from the cover plate body, wherein the hot bending position is a region symmetrically extending 1 mm to 3 mm on both sides based on the center point of the fan-shaped protrusion.

[0023] According to an embodiment of the present invention, in step S21, the hot pressing temperature for hot pressing forming is 600 to 1000 °C, the hot pressing pressure is 0.3 to 0.6 MPa, and the hot pressing time is 2 to 5 min.

[0024] According to an embodiment of the present invention, in steps S22 and S26, the hot bending temperature for hot bending forming is 1000 to 1300 °C, and the hot bending pressure is 0.7 to 1.2 MPa.

[0025] These and other objects, features, and advantages of the present invention are fully embodied through the following detailed description. Brief Description of the Drawings

[0026] Figure 1 Shows a three-dimensional structural schematic diagram of the convex surface of the glass cover plate in a preferred embodiment of the present application.

[0027] Figure 2 Shows a three-dimensional structural schematic diagram of the concave surface of the glass cover plate in a preferred embodiment of the present application.

[0028] Figure 3 Shows a schematic flow chart of the forming process of the glass cover plate in a preferred embodiment of the present application.

[0029] Figure 4 Shows a schematic flow chart of the forming process of the glass cover plate in a preferred embodiment of the present application.

[0030] Figure 5 Shows a schematic front cross-sectional view of the glass cover plate in a preferred embodiment of the present application. Detailed Implementation Modes

[0031] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and other obvious variations can be conceived by those skilled in the art. The basic principles defined in the following description of the present invention can be applied to other implementation schemes, variant schemes, improvement schemes, equivalent schemes, and other technical schemes without departing from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that in the disclosure of the specification, the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0033] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" should not be construed as limiting the quantity.

[0034] Reference Figure 1 And Figure 2 , a glass cover plate according to a preferred embodiment of the present invention will be elaborated in detail below. The glass cover plate includes a cover plate body 10 and a cover plate side wall 20. A glass protrusion 11 is provided on the top of the cover plate body 10, and a camera hole is reserved on the glass protrusion 11 for installing a camera lens. At the same time, the cover plate side wall 20 is arranged on the periphery of the cover plate body 10 in a manner of being integrally formed with the cover plate body 10 and bends a predetermined angle in a direction away from the glass protrusion 11. The predetermined angle can be 90 degrees, or other inclined angles, such as any angle within the range of 80 degrees to 100 degrees. In addition, a fan-shaped strengthening structure 30 is integrally provided at the bending joint of the cover plate body 10 and the cover plate side wall 20. The fan-shaped protrusion of the fan-shaped strengthening structure 30 is located at the middle position between the cover plate body 10 and the cover plate side wall 20, so as to greatly improve the connection strength between the cover plate side wall 20 and the cover plate body 10 on the basis of slightly increasing the overall weight, meeting the lightweight requirement. At the same time, whether in the process of pre-processing the glass cover plate or in the process of later using the glass cover plate, the cover plate side wall 20 is not easily broken, reducing the breakage and loss rate, and thus resources can be saved and the manufacturing and use costs can be reduced.

[0035] In one embodiment, the height of the glass protrusion 11 is 0.5 mm to 3 mm, such as 0.6 mm, 0.9 mm, 1.2 mm, 1.5 mm, 1.8 mm or 2.3 mm.

[0036] In one embodiment, the radius of the fan-shaped curved surface of the fan-shaped reinforcing structure 30 is 0.5 mm to 3 mm, such as 0.6 mm, 0.9 mm, 1.2 mm, 1.5 mm, 1.8 mm or 2.3 mm.

[0037] Example 1:

[0038] Second aspect, in combination with Figure 3 , the present application further provides a glass cover plate forming process, which successively includes the following steps:

[0039] S11, hot press forming, hot press the 2D flat glass along a predetermined annular position to form a special-shaped glass with a fan-shaped protrusion 41, wherein the predetermined annular position is the connection position between the cover plate body 40 and the cover plate side wall 50 of the glass cover plate, wherein the fan-shaped protrusion 41 vertically extends from the cover plate body 40 towards the same side direction, and a fan-shaped groove 401 is correspondingly formed on the other side surface opposite to the cover plate body 40. The hot press temperature for hot press forming is 600 to 1000 °C, such as 750 °C, 800 °C or 950 °C, the hot press pressure for hot press forming is 0.2 to 0.3 MPa, such as 0.23 MPa, 0.25 MPa or 0.28 MPa, and the hot press time for hot press forming is 2 to 3 min, such as 2.3 min, 2.5 min or 2.8 min;

[0040] S12, cut off the side of the cover plate body 40 with the fan-shaped groove 401, and reserve a glass protrusion 42 for forming a camera hole. The fan-shaped groove 401 is completely cut off, so that the other side surface of the cover plate body 40 is a smooth surface. The protruding height of the glass protrusion 42 is greater than or equal to the maximum depression depth of the fan-shaped groove 401 to ensure that the other side surface of the cover plate body 40 is a smooth surface. When the protruding height of the glass protrusion 42 is greater than the maximum depression depth of the fan-shaped groove 401, it means that the protruding height of the glass protrusion 42 is greater than the radius of the fan-shaped protrusion 41. At this time, the thickness of the glass protrusion 42 can be appropriately thinned by a thinning process to meet the use requirements. Of course, the thickness of the glass protrusion 42 can also not be thinned, then at this time the protruding height of the glass protrusion 42 is greater than the radius of the fan-shaped protrusion 41;

[0041] S13, open a camera hole at the glass protrusion 42;

[0042] S14. Heat bending forming. Heat bend the side wall 50 of the cover plate so that the side wall 50 of the cover plate bends away from the glass protrusion 42 from the cover plate body 40. The heat bending position is the area symmetrically extending 1 mm to 3 mm on both sides with the center point of the fan-shaped protrusion 41 as the reference, that is, always ensuring that the center of the heat bending position is the center of the fan-shaped protrusion 41, and the bending area symmetrically extends 1 mm to 3 mm on both sides with the fan-shaped protrusion 41 as the center, such as extending 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.3 mm or 2.6 mm. The length of the bending area is twice the extension length. In addition, the heat bending temperature for heat bending forming is 1000 - 1300 °C, and the heat bending pressure is 0.7 - 1.2 MPa, such as 0.8 MPa, 1.0 MPa or 1.1 MPa.

[0043] Example 2:

[0044] In the third aspect, in combination with Figure 4 , this application also provides a glass cover plate forming process, which successively includes the following steps:

[0045] S21. Hot pressing forming. Hot press the 2D flat glass along the predetermined annular position to form a special-shaped glass with a fan-shaped protrusion 61. The predetermined annular position is the connection position between the cover plate body 60 and the cover plate side wall 70 of the glass cover plate. The fan-shaped protrusion 61 vertically extends from the cover plate body 60 in the same side direction, and a fan-shaped groove 601 is correspondingly formed on the other side opposite to the cover plate body 60. Hot press the 2D flat glass synchronously or asynchronously so that the 2D flat glass forms a glass protrusion 62 for forming a camera hole on the surface with the fan-shaped groove 601. A glass protrusion groove 602 is formed on the other side opposite to the glass protrusion 62. That is to say, the fan-shaped protrusion 61 and the glass protrusion 62 can be formed synchronously, or the fan-shaped protrusion 61 can be formed first and then the glass protrusion 62, or the glass protrusion 62 can be formed first and then the fan-shaped protrusion 61. The hot pressing temperature for hot pressing forming is 600 - 1000 °C, such as 700 °C, 800 °C or 900 °C. The hot pressing pressure for hot pressing forming is 0.3 - 0.6 MPa, such as 0.4 MPa, 0.45 MPa, 0.5 MPa or 0.55 MPa. The hot pressing time for hot pressing forming is 2 - 5 min, such as 2.5 min, 3 min, 3.5 min or 4 min;

[0046] S22. Perform one-time hot bending to bend the side wall 70 of the cover plate, causing the side wall 70 of the cover plate to bend away from the glass convex groove 602 from the cover plate body 60, where the bending position is 0 - 3 mm inside the fan-shaped protrusion 61. And after one-time hot bending, the lowest point of the fan-shaped protrusion 61 is not lower than the bottom position of the glass convex groove 602 to avoid damaging the fan-shaped protrusion 61 during the subsequent cutting in step S23. The hot bending temperature for hot bending forming is 1000 - 1300 °C, such as 1100 °C, 1200 °C or 1250 °C, and the hot bending pressure for hot bending forming is 0.7 - 1.2 MPa, such as 0.8 MPa, 0.9 MPa or 1.1 MPa;

[0047] S23. Cut off the redundant part of the cover plate body 60 based on the bottom of the glass convex groove 602. Additionally, when necessary, a slightly larger part can also be cut along the thickness direction as long as the bottom surface is ensured to be a smooth surface;

[0048] S24. Hot press and flatten the 2d flat glass;

[0049] S25. Cut off a predetermined thickness of the outer part of the fan-shaped groove 601 to make the thickness of the side wall 70 of the cover plate equal to the thickness of the cover plate body 60;

[0050] S26. Perform secondary hot bending to bend the side wall 70 of the cover plate, causing the side wall 70 of the cover plate to bend away from the glass protrusion 62 from the cover plate body 60, where the hot bending position is a region symmetrically extending 1 mm - 3 mm from the center point of the fan-shaped protrusion 61 to both sides, such as 1.3 mm, 1.5 mm, 1.8 mm, 2.3 mm or 2.5 mm. The hot bending temperature for hot bending forming is 1000 - 1300 °C, such as 1100 °C, 1200 °C or 1250 °C, and the hot bending pressure for hot bending forming is 0.7 - 1.2 MPa, such as 0.8 MPa, 0.9 MPa or 1.1 MPa.

[0051] To further demonstrate the advantages of the glass cover plate and its forming process provided in this application, taking the same thickness of the side wall of the cover plate and the cover plate body as Comparative Example 1, and taking the thickness of the side wall of the cover plate being greater than the thickness of the cover plate body as Comparative Example 2, combining Example 1 and Example 2, taking the same number of glass cover plates from each of the four and conducting tests in the same environment, and taking their average values to form the test data shown in Table 1:

[0052] Serial number 4pb detection (Mpa) Falling ball crushing height (cm) Comparative example 1 402.33 77 Comparative example 2 502.33 92 Example 1 697.80 134 Example 2 690.66 131

[0053] Table 1

[0054] As shown in Table 1, in the 4pb test, the glass cover is subjected to a four-point bending test, and the pressure resistance of Example 1 and Example 2 is significantly improved, and the connection strength between the cover side wall and the cover body is better, and it is less likely to bend and deform than Comparative Example 1 and Comparative Example 2;

[0055] In the drop ball breaking height test, the glass cover plate is placed vertically with the cover plate side wall at the top, and the drop ball test is performed on the top. The initial drop ball height at which the cover plate side wall is broken or fractured in Example 1 and Example 2 is also significantly improved compared with Comparative Example 1 and Comparative Example 2, which also shows that the connection strength between the cover plate side wall and the cover plate body in Example 1 and Example 2 is better, and the cover plate side wall is not easy to break;

[0056] Therefore, the glass cover plate and the glass cover plate forming process provided by the present application can greatly improve the connection strength between the cover plate side wall and the cover plate body on the basis of slightly increasing the overall weight, thereby meeting the lightweight requirements. At the same time, whether in the early stage of processing the glass cover plate or in the later stage of using the glass cover plate, the side wall of the cover plate is not easy to break, thereby reducing the breakage rate, thereby saving resources and reducing manufacturing and use costs.

[0057] In addition, refer to Figure 5 In Example 1, when hot bending is performed, the hot bending position can also deviate from the center point of the fan-shaped protrusion 41, and bend at the fan-shaped protrusion 41 close to the cover plate body 40, thereby deforming the fan-shaped protrusion 41, wherein the center point of the fan-shaped protrusion 41 is located on the cover plate side wall 50, and most of the fan-shaped protrusion 41 remains parallel to the cover plate side wall 50;

[0058] In Example 2, the secondary hot bending forming is the same as the hot bending forming in the embodiment, which will not be described again.

[0059] It should be noted that the terms "first, second and third" in the present invention are only used for descriptive purposes and do not indicate any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0060] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. Glass cover plate forming process, characterized in that, The following steps are included in sequence: S11, hot pressing and forming, hot pressing the 2D flat glass along a predetermined annular position to form the 2D flat glass into a special-shaped glass with a fan-shaped protrusion, wherein the predetermined annular position is a connection position between a cover body and a cover side wall of the glass cover, wherein the fan-shaped protrusion vertically extends from the cover body toward the same side direction, and a fan-shaped groove is correspondingly formed on the other side opposite to the cover body; S12, cutting off one side of the cover body with the fan-shaped groove and reserving a glass protrusion for forming a camera hole, wherein the fan-shaped groove is completely cut off, so that the other side of the cover body except the glass protrusion is a smooth surface; S13, opening a camera hole at the glass protrusion; S14, hot bending forming, hot bending the side wall of the cover plate so that the side wall of the cover plate is bent from the cover plate body toward the direction away from the glass protrusion, wherein the hot bending position is an area extending symmetrically by 1mm to 3mm on both sides based on the center point of the fan-shaped protrusion.

2. The glass cover plate forming process according to claim 1, characterized in that, In step S11, the hot pressing temperature of the hot pressing molding is 600-1000° C., the hot pressing pressure is 0.2-0.3 MPa, and the hot pressing time is 2-3 min.

3. The glass cover plate forming process according to claim 1, wherein, In step S12, the protruding height of the glass protrusion is greater than or equal to the maximum recessed depth of the fan-shaped groove.

4. The glass cover plate forming process according to claim 1, characterized in that, In step S14, the hot bending temperature of the hot bending forming is 1000-1300° C., and the hot bending pressure is 0.7-1.2 MPa.

5. Glass cover plate forming process, characterized in that, The following steps are included in sequence: S21, hot pressing and forming, hot pressing a 2D flat glass along a predetermined annular position to form the 2D flat glass into a special-shaped glass with a fan-shaped protrusion, wherein the predetermined annular position is a connection position between a cover body and a cover side wall of the glass cover, wherein the fan-shaped protrusion vertically extends from the cover body toward the same side direction, and a fan-shaped groove is correspondingly formed on the other side opposite to the cover body, and the special-shaped glass is hot pressed synchronously or asynchronously to form a glass protrusion for forming a camera hole on the surface of the special-shaped glass having the fan-shaped groove, wherein a glass protrusion groove is formed on the other side opposite to the glass protrusion; S22, performing one-step hot bending to hot bend the side wall of the cover plate so that the side wall of the cover plate is bent from the cover plate body toward a direction away from the groove of the glass protrusion, wherein the bending position is 0 to 3 mm inside the fan-shaped protrusion, and after the one-step hot bending, the lowest point of the fan-shaped protrusion is not lower than the bottom position of the groove of the glass protrusion; S23, cutting off the redundant portion of the cover plate body on the side where the groove bottom is located, based on the groove bottom of the glass protrusion groove; S24, hot pressing and flattening the special-shaped glass from which the excess portion has been cut off; S25, cutting off a predetermined thickness of the outer portion of the fan-shaped groove so that the thickness of the side wall of the cover plate is equal to the thickness of the cover plate body; S26, secondary hot bending forming, hot bending the side wall of the cover plate so that the side wall of the cover plate is bent from the cover plate body toward the direction away from the glass protrusion, wherein the hot bending position is an area symmetrically extending 1mm to 3mm on both sides with the center point of the fan-shaped protrusion as a reference.

6. The glass cover plate forming process according to claim 5, characterized in that, In step S21, the hot pressing temperature for hot pressing forming is 600 to 1000 °C, the hot pressing pressure is 0.3 to 0.6 MPa, and the hot pressing time is 2 to 5 min.

7. The glass cover plate forming process according to claim 5, characterized in that, In steps S22 and S26, the hot bending temperature for hot bending forming is 1000 to 1300 °C, and the hot bending pressure is 0.7 to 1.2 MPa.

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