CN112897863B - Preparation method of curved glass, curved glass and mobile terminal - Google Patents

Abstract

The present disclosure relates to a preparation method of curved glass, curved glass and a mobile terminal. The preparation method includes: cutting a glass substrate to obtain a glass substrate of a preset size; The two ends of the glass substrate are respectively formed with arc-shaped curved parts, and the edge parts of the two ends of the glass substrate are respectively formed into an inverted structure, and the curved curved parts and the inverted structure are in opposite directions; The arc-shaped bending portion is subjected to a secondary hot pressing treatment to fold the arc-shaped bending portion back, so as to obtain a hyperbolic undercut curved glass. The preparation method of the present disclosure can accurately form an inverted structure, so that the glass substrate can form a precise bending arc, and is convenient for hot pressing and removal of the hot pressing module. , to meet the user's high-quality appearance requirements for the corresponding terminal with curved glass.

Description

Preparation method of curved glass, curved glass and mobile terminal

technical field

The present disclosure relates to the technical field of curved glass preparation, and in particular, to a preparation method of curved glass, curved glass and a mobile terminal.

Background technique

With the update and iteration of consumer electronic products, in electronic devices with display screens (such as smartphones, tablet computers, personal digital assistants, etc.), in order to provide users with a better visual experience, the screen ratio of the display screen It is getting higher and higher, and the design of large-curvature display screens is the direction of future exploration. In order to meet the needs of future curved screen display design, the processing technology of large-curvature glass suitable for display panels has become a new topic for industry research.

SUMMARY OF THE INVENTION

In view of this, the present disclosure proposes a method for preparing a curved glass, a curved glass and a mobile terminal to solve some or all of the above technical problems.

In order to achieve the above purpose, the technical solution adopted in the present disclosure is:

According to a first aspect of the embodiments of the present disclosure, a method for preparing curved glass is provided, including:

Cut the glass substrate to obtain a glass substrate of preset size;

The glass substrate is heat-pressed so that both ends of the glass substrate form arc-shaped curved portions respectively, and the edge portions at both ends of the glass substrate are respectively formed into an inverted structure, and the two arc-shaped curved portions are formed respectively. The bending directions of the two inversion structures are the same, and the bending directions of the curved curved parts are opposite to the bending directions of the inversion structures;

The arc-shaped curved portion is subjected to secondary hot pressing treatment to fold the arc-shaped curved portion back, so as to obtain a curved glass with an inverted structure.

Optionally, the thermocompression treatment of the glass substrate includes:

The glass substrate is hot-pressed at a first predetermined temperature through a preset first hot-pressing mold, so as to simultaneously form the arc-shaped bending portion and the undercut structure.

Optionally, performing a secondary hot-pressing process on the arc-shaped curved portion to fold the arc-shaped curved portion back includes:

The arc-shaped curved portion is hot-pressed at a second preset temperature by a preset second hot-pressing die, so as to restore the arc-shaped curved portion to a non-bending state.

Optionally, the thermocompression treatment of the glass substrate includes:

When forming the arc-shaped curved portion by hot pressing, the main body portion connected between the two arc-shaped curved portions is simultaneously hot-pressed, so that the main body portion forms an arc surface.

Optionally, the included angle corresponding to the arc forming the arc-shaped curved portion is α, where 90°≦α<180°.

Optionally, the included angle corresponding to the arc forming the undercut structure is β, where 90°<β≤180°.

Optionally, when an undercut structure is formed at the edge portions of both ends of the glass substrate, the end face of the free end of the undercut structure is parallel to the main body part connected between the two arc-shaped curved parts.

According to a second aspect of the embodiments of the present disclosure, there is provided a curved glass made by the method for preparing a curved glass according to any one of the above, wherein the edge portions on both sides of the curved glass are inverted structures, and the two Each of the inverted buckle structures is formed by bending in opposite directions.

Optionally, the included angle corresponding to the arc forming the undercut structure is β, where 90°<β≤180°.

According to a third aspect of the embodiments of the present disclosure, there is provided a mobile terminal, including the curved glass according to the foregoing embodiments.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: in the preparation method of the present disclosure, while the glass substrate is hot-pressed to form the inverted structure, an arc-shaped curved portion that is bent in the opposite direction to the inverted structure is prepared, and then the two Hot pressing to make the arc-shaped curved part fold back, so that the glass substrate can be prepared into a hyperbolic inverted curved glass. This preparation method can accurately form an inverted structure, so that the glass substrate can form a precise bending arc, and it is convenient for the hot pressing module to carry out Hot-pressed and taken out, the inverted structure can be adapted to the display panel displayed on the side and extended to the back, meeting the user's high-quality appearance requirements for the corresponding terminal with curved glass.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

FIG. 1 is a flowchart of a method for preparing a curved glass according to an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a curved glass after hot pressing according to an exemplary embodiment of the present disclosure;

3 is a schematic structural diagram of a hyperbolic inverted curved glass according to an exemplary embodiment of the present disclosure;

4 is a schematic structural diagram of a curved glass after hot pressing according to another exemplary embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a hyperbolic upside-down curved glass according to another exemplary embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a hyperbolic inverted curved glass according to another exemplary embodiment of the present disclosure.

Detailed ways

The present disclosure will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present disclosure, and structural, method, or functional transformations made by those of ordinary skill in the art based on these embodiments are all included in the protection scope of the present disclosure.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to limit the present disclosure. As used in this disclosure and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

Some embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments may be combined with each other without conflict.

As shown in FIG. 1 , in a first aspect of the embodiments of the present disclosure, a method for preparing curved glass is provided, and the preparation method includes:

S101 , cutting a glass substrate to obtain a glass substrate of a preset size.

In this embodiment, a large-sized glass substrate is cut according to a predetermined size and shape by a CNC machine tool, that is, a large glass substrate is cut into small glass substrates corresponding to a predetermined size, thereby obtaining a glass substrate with a predetermined size , the predetermined size of the glass substrate matches the size of the mobile terminal. It should be noted that since the glass substrate needs to be provided with an inverted structure, the size of the glass substrate of the preset size is larger than that of the mobile terminal, and the glass substrate is in a flat shape at this time.

S102 , heat-pressing the glass substrate, so that both ends of the glass substrate form arc-shaped curved portions respectively, and the edge portions at both ends of the glass substrate respectively form an inverted structure, and the bending directions of the two arc-shaped curved portions are the same , the bending directions of the two inverted buckle structures are the same, and the curved curved portion is opposite to the bending direction of the inverted buckle structures.

In this embodiment, as shown in FIG. 2 and FIG. 4 , the curved curved portion 12 and the inverted buckle structure 13 are formed at the same time, the curved curved portion 12 is bent in the same downward direction, and the inverted buckle structure 13 is curved in the same direction. . The two arc-shaped curved portions 12 are arranged symmetrically with respect to the center point of the glass substrate, and the two inverted buckle structures 13 are arranged symmetrically with respect to the center point of the glass substrate. The inverted structure 13 on the same side of the curved curved portion 12 is close to the center of the glass substrate.

The hot-pressing treatment of the glass substrate specifically includes: using a preset first hot-pressing mold to hot-press the glass substrate at a first predetermined temperature, so as to simultaneously form the curved curved portion 12 and the undercut structure 13 . The first hot-pressing die includes an upper die and a lower die that are oppositely arranged. The upper pressing die and the lower pressing die have a first pressing part (ie, the cooperation between the concave part and the convex part) that cooperates with each other to form the arc-shaped curved part 12 , and a second pressing part that cooperates with each other to form an undercut structure (Matching of the convex part and the concave part). The first pressing part and the second pressing part are two and symmetrically arranged. The first predetermined temperature may be set with reference to the temperature of a general hot pressing process, and may specifically be set at 500°C-800°C.

When the glass substrate is hot-pressed, the flat-shaped glass substrate is placed between the upper die and the lower die of the first hot-pressing die; the glass substrate is then gradually heated up by a heater until it reaches the first predetermined temperature, The glass substrate is gradually heated to a softened state; then pressure is applied to drive the upper die and the lower die to be pressed together, at this time the glass substrate is deformed with the shape of the first hot-pressing die to form a curved curved portion 12 and an inverted structure 13 at the same time. glass substrate.

As shown in FIG. 6 , since the glass substrate is in a flat shape, when the arc-shaped bending portion 12 and the inverted structure 13 are formed in the above steps, the glass plate between the two inverted structures 13 is flat. In order to satisfy the three-dimensional effect of the display screen, the display screen needs to be set as a 3D curved screen, and correspondingly, the curved glass 10 also needs to be made into an arc shape. Specifically, in step S102, the hot-pressing treatment of the glass substrate specifically includes: when hot-pressing to form the arc-shaped bending portion 12, simultaneously heat-pressing the main body portion 11 connected between the two arc-shaped bending portions 12 (ie, as shown in the figure) The part between the points A and B) is hot-pressed so that the main body part 11 of the glass substrate forms an arc surface.

In this step, the arc-shaped bending portion 12 and the main body portion 11 of the glass substrate share the first hot-pressing mold. When the arc-shaped bending portion 12 is heated, the main body portion 11 of the glass substrate is also heated at the same time, and the temperature is gradually increased to reach After the first preset temperature, pressing is performed by a first hot pressing mold, so that the main body portion 11 of the glass substrate forms an arc surface.

S103 , performing a secondary hot pressing treatment on the curved curved portion to fold the curved curved portion back, so as to obtain a curved glass with an inverted structure.

In this embodiment, as shown in FIG. 3 and FIG. 5 , performing a secondary hot pressing process on the curved curved portion 12 to make the curved curved portion 12 fold back specifically includes: using a preset second hot pressing mold, in the second The arc-shaped bending portion 12 is hot-pressed at a preset temperature to restore the arc-shaped bending portion 12 to a non-bending state, specifically, it is flattened or has a certain curvature. The opposite sides of the upper die and the lower die of the second hot pressing die are flat or curved, so that the curved curved portion 12 is flattened or has a certain curvature. The second predetermined temperature can be set with reference to the temperature of a general hot pressing process, and specifically can be set at 500°C-800°C.

This step is specifically as follows: after taking out the molded glass substrate, the arc-shaped bending portion 12 is gradually heated up to the second preset temperature by a heater, so that the arc-shaped bending portion 12 is gradually heated to soften, but the pressure is applied to drive the upper pressure The film is pressed against the lower die so that the arcuate bend 12 is folded back to form a flat or arcuate surface. At this time, the inverted buckle structure is rotated accordingly, so that both sides of the glass substrate form a hook-like structure, that is, the inverted buckle structure on both sides is formed by bending inward, so that the free end of the inverted buckle structure can extend to the back of the mobile terminal. Thus, the curved glass 10 with the inverted structure is obtained.

The hyperbolic inverted curved glass 10 can bend the free end of the inverted structure to extend to the back of the terminal main body of the mobile terminal, which can meet the display requirements of the back edge; or the free end of the inverted structure can extend to cover the entire The back of the terminal body, so as to meet the requirement that the back of the mobile terminal can also be displayed.

In the present disclosure, the two ends of the glass substrate are respectively formed with arc-shaped curved portions 12 with the same bending direction, and the edge portions at both ends of the glass substrate are respectively formed with the same inverted structure, and the curved curved portions 12 and the inverted structure are curved in the same direction. on the contrary. It can be seen from the figures that the arc-shaped curved portion 12 is bent downward, and the inverted buckle structure is bent upward. The included angle corresponding to the arc forming the arc-shaped curved portion 12 is α, wherein 90°≤α<180°, and the included angle corresponding to the arc forming the inverted structure is β, wherein 90° <β≤180°.

When the edge portions of both ends of the glass substrate are respectively formed with inverted structures that are bent in the same direction, the end faces of the free ends of the inverted structures (ie the end faces shown in the figure) are parallel to the main body 11 of the glass substrate. That is to say, any angle α corresponding to the arc shape of the arc-shaped curved portion 12 is within a limited range, and the end face of the free end of the undercut structure is always kept parallel to the main body portion 11 of the glass substrate, so as to form a hyperbolic inversion. When the curved glass 10 is buckled, the different degrees of inversion of the inversion structure are controlled. It should be noted that the end face of the free end of the undercut structure is the side face in the width direction when the glass substrate is a plane.

In one embodiment, as shown in FIG. 2 and FIG. 3 , when the included angle α corresponding to the arc forming the arc-shaped curved portion 12 is 90°, the included angle β corresponding to the arc forming the inverted structure is The maximum can reach 180°. At this time, the first hot-pressing mold adopts two compression molds to relatively press and form at one time; subsequently, the arc-shaped bending portion 12 is hot-pressed and folded back to form an inverted structure at both ends of the glass substrate. At this time, the inverted structure is The extension direction of the free end is parallel to the main body portion 11 of the glass substrate.

In yet another embodiment, as shown in FIGS. 4 and 5 , when the included angle α corresponding to the arc forming the curved curved portion 12 is 110°, the included angle corresponding to the arc forming the undercut structure is β can reach a maximum of 120°. At this time, the first hot pressing mold is used to form two pressing dies relative to each other at one time; then the curved curved portion 12 is then hot pressed and folded back to form an inverted structure at both ends of the glass substrate. After the glass substrate forms the double-curved inverted curved glass 10, when β is 120°, the included angle between the extension line of the free end of the inverted structure and the main body 11 of the glass substrate is 20°.

In the preparation method of the present disclosure, while the glass substrate is hot-pressed to form an inverted structure, an arc-shaped bent portion opposite to the inverted structure is prepared, and then the arc-shaped bent portion is folded back through secondary hot pressing, so as to prepare the glass substrate. Inverted curved glass, the preparation method can accurately form an inverted structure, so that the glass substrate can form a precise bending arc, and it is convenient for the hot pressing module to be hot pressed and taken out, and the inverted structure can be adapted to the side and It extends to the display panel displayed on the back to meet the user's high-quality appearance requirements for the corresponding terminal with curved glass.

According to a second aspect of the embodiments of the present disclosure, there is provided a curved glass made by the method for preparing curved glass according to any one of the various embodiments, wherein the edge portions on both sides of the curved glass are inverted structures, and two The inverted buckle structure is formed by bending in opposite directions. Wherein, the included angle corresponding to the arc forming the undercut structure is β, where 90°<β≤180°. This arrangement enables the curved glass to cover the back of the terminal main body of the mobile terminal, thereby realizing a high screen ratio of the display screen, satisfying the design of the display screen with large curvature, and bringing a better visual experience to the user.

It should be noted that the curved glass of the embodiment of the present invention can be obtained by the above-mentioned preparation method of the curved glass. Wherein, all the implementation manners in each embodiment of the above-mentioned method for preparing curved glass are applicable to the embodiment of the curved glass, and the same technical effect can also be achieved.

According to a third aspect of the embodiments of the present disclosure, there is also provided a mobile terminal, the mobile terminal includes a terminal body, a display panel mounted on the terminal body, and the curved glass of each of the foregoing embodiments. The display panel is a liquid crystal screen, and the liquid crystal screen is a curved screen and extends to the back of the terminal body. The glass panel of the present disclosure can form an inverted structure on both sides of the curved glass of the display panel, thereby protecting the display panel. Wherein, the mobile terminal may be an electronic device such as a smart phone, a tablet computer, and a personal digital assistant.

Wherein, the above-mentioned embodiments of the curved glass are all applicable to the embodiments of the mobile terminal, and the same technical effect can also be achieved.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the claims of this application.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. a preparation method of curved glass, is characterized in that, comprises: Cut the glass substrate to obtain a glass substrate of preset size; The glass substrate is heat-pressed so that both ends of the glass substrate form arc-shaped curved portions respectively, and the edge portions at both ends of the glass substrate are respectively formed into an inverted structure, and the two arc-shaped curved portions are formed respectively. The bending directions of the two inversion structures are the same, and the bending directions of the curved curved parts are opposite to the bending directions of the inversion structures; The arc-shaped curved portion is subjected to secondary hot pressing treatment to fold the arc-shaped curved portion back, so as to obtain a curved glass with an inverted structure. 2 . The preparation method according to claim 1 , wherein the hot pressing of the glass substrate comprises: 2 . The glass substrate is hot-pressed at a first predetermined temperature through a preset first hot-pressing mold, so as to simultaneously form the arc-shaped bending portion and the undercut structure. 3 . The preparation method according to claim 1 , wherein the performing a secondary hot-pressing treatment on the arc-shaped curved portion to make the arc-shaped curved portion fold back comprises: 4 . The arc-shaped curved portion is hot-pressed at a second preset temperature by a preset second hot-pressing die, so as to restore the arc-shaped curved portion to a non-bending state. 4 . The preparation method according to claim 3 , wherein the hot-pressing treatment of the glass substrate comprises: 4 . When forming the arc-shaped curved portion by hot pressing, the main body portion connected between the two arc-shaped curved portions is simultaneously hot-pressed, so that the main body portion forms an arc surface. 5 . The preparation method according to claim 1 , wherein the included angle corresponding to the arcs forming the arc-shaped curved portion is α, wherein 90°≦α<180°. 6 . 6 . The preparation method according to claim 1 , wherein the included angle corresponding to the arc shape forming the undercut structure is β, wherein 90°<β≤180°. 7 . 7 . The preparation method according to claim 1 , wherein when the edge portions at both ends of the glass substrate are respectively formed with an undercut structure, between the end face of the free end of the undercut structure and the two arc-shaped curved portions. 8 . The connected body parts are parallel. 8. A curved glass made by the method for preparing curved glass according to any one of claims 1 to 7, characterized in that, the edges on both sides of the curved glass are inverted structures, and the two The inverted buckle structure is formed by bending in opposite directions. 9 . The curved glass according to claim 8 , wherein the included angle corresponding to the arc shape forming the undercut structure is β, wherein 90°<β≤180°. 10 . 10. A mobile terminal, comprising the curved glass according to claim 8 or 9.

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