CN113562963B - Four-curved-surface glass cover plate processing method and four-curved-surface glass cover plate processing device - Google Patents
Four-curved-surface glass cover plate processing method and four-curved-surface glass cover plate processing device Download PDFInfo
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- CN113562963B CN113562963B CN202010347290.2A CN202010347290A CN113562963B CN 113562963 B CN113562963 B CN 113562963B CN 202010347290 A CN202010347290 A CN 202010347290A CN 113562963 B CN113562963 B CN 113562963B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The disclosure provides a processing method and a processing device for a four-curved-surface glass cover plate, wherein the processing method for the four-curved-surface glass cover plate comprises the following steps: melting the glass raw material of the four-curved-surface glass cover plate in a high-temperature melting furnace; performing a curvature forming processing procedure on the molten glass raw material to obtain a four-curved-surface glass raw sheet with a first curvature; performing a hot bending forming processing procedure on the original four-curved-surface glass sheet with the first curvature to obtain a four-curved-surface glass cover plate with the second curvature; wherein the first curvature is greater than the second curvature. Through the four curved surface glass cover plate of pure four curved forms that this disclosure can realize four sides natural transition, the mode of the curved processing of tradition monolithic glass heat can improve production efficiency.
Description
Technical Field
The disclosure relates to the field of glass cover plate forming technology, in particular to a four-curved-surface glass cover plate processing method and a four-curved-surface glass cover plate processing device.
Background
Terminals such as smart phones become an indispensable part of people's daily life, and perfect molding of the glass cover plate of the display screen with four curved surfaces of the terminal is a key for users to present perfect experience of extreme picture and corner handfeel.
The four-curved-surface glass cover plate forming process mainly comprises the step of softening and hot-bending single-sheet planar glass at high temperature through a graphite die pressing head with specific curvature required by a single-sheet glass hot-bending processing mode. However, in the single-piece glass hot bending processing mode, four corners of the four-curved-surface glass cover plate are extruded to form cracks and wrinkles formed by glass accumulation, the appearance and the user experience of the whole glass are affected, and the yield is low.
In order to reduce the risk of wrinkling of the four-curved-surface glass cover plate, the related technology carries out hot bending forming through a four-corner opening shrinkage scheme. In this way, the risk of wrinkling can be reduced, but for the overall appearance of the four-curved-surface glass cover plate, the curve at the corner position and the transition experience of the display picture are poor, the bright screen display transition is vivid and hard, the corner transition of the glass cover plate is replaced by a metal middle frame, and the corner hand feeling is not as round as that of a pure middle frame of a conventional product.
Therefore, the processing technology of the four-curved-surface glass cover plate in the traditional single-sheet glass hot bending forming mode has lower yield and lower production efficiency, and the processing technology of the four-curved-surface glass cover plate needs to be further improved.
Disclosure of Invention
In order to overcome the problems in the related art, the present disclosure provides a method for processing a four-curved glass cover plate and a device for processing a four-curved glass cover plate.
According to a first aspect of embodiments of the present disclosure, there is provided a method for processing a four-curved glass cover plate, the method comprising: melting the glass raw material of the four-curved-surface glass cover plate in a high-temperature melting furnace; performing a curvature forming processing procedure on the molten glass raw material to obtain a four-curved-surface glass raw sheet with a first curvature; performing a hot bending forming processing procedure on the original four-curved-surface glass sheet with the first curvature to obtain a four-curved-surface glass cover plate with the second curvature; wherein the first curvature is greater than the second curvature.
In one embodiment, the curvature molding process of a molten glass raw material to obtain a four-curved-surface glass raw sheet having a first curvature includes: vertically and flatly drawing the molten glass raw material into a die cavity of a molding master plate, wherein the shape of the die cavity is the same as that of the four-curved-surface glass raw sheet with the first curvature; and cooling and solidifying the molten glass raw material paved in the die cavity to perform curvature molding to obtain the four-curved-surface glass raw sheet with the first curvature.
In another embodiment, the molding master is a large-plate glass molding master, and the four-curved-surface glass raw sheet obtained after the curvature molding processing is in a large-plate glass raw sheet form.
In another embodiment, the hot bending process is performed on the original sheet of the four-curved glass with the first curvature to obtain a four-curved glass cover plate with the second curvature, which comprises:
cutting a four-curved-surface glass raw sheet in a large-plate glass raw sheet form; correspondingly cutting the obtained four-curved-surface glass raw sheet, and opening a graphite die of the four-curved-surface glass cover plate; and performing a hot bending forming processing procedure on the cut four-curved-surface glass raw sheet by using the die-opened four-curved-surface glass cover plate graphite die to obtain the four-curved-surface glass cover plate with the second curvature.
In yet another embodiment, the cut four-curved glass raw sheet comprises one or more four-curved glass raw sheets.
In another embodiment, the hot bending process is performed on the original sheet of the four-curved glass with the first curvature to obtain a four-curved glass cover plate with the second curvature, which comprises:
opening the graphite mold of the four-curved-surface glass cover plate corresponding to the large glass sheet; and performing one-time hot bending forming processing procedure on each four-curved-surface glass raw sheet in the large-plate glass raw sheet by using the graphite mold of the four-curved-surface glass cover plate after mold opening to obtain the four-curved-surface glass cover plate with the second curvature.
In yet another embodiment, the four-curve glass cover plate graphite mold is a large plate graphite mold.
In yet another implementation, the embodiment of the disclosure relates to a method for processing a four-curved glass cover plate, further including:
and carrying out laser cutting and/or polishing treatment on the residual material part with uneven glass stress and/or abnormal microcrack in the four-curved-surface glass cover plate obtained by hot bending forming processing.
According to a first aspect of embodiments of the present disclosure, there is provided a four-curved glass cover plate processing apparatus, including:
the high-temperature melting furnace is used for melting the glass raw material of the four-curved-surface glass cover plate; a molding master plate is provided with a die cavity, and the shape of the die cavity is the same as that of a quadric-surface glass original sheet with a first curvature; and the glass forming machine is used for pushing out, cutting and overturning the forming master plate through the sliding rail and the rotating shaft.
In one embodiment, the molding master is a large plate glass molding master.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the first curvature four-curved-surface glass raw sheet can be formed according to the process limit because the molten glass raw material has high plasticity. The four-curved-surface glass cover plate with the second curvature is formed by performing hot bending forming processing on the four-curved-surface glass raw sheet with the first curvature, and the surface of the four-curved-surface glass raw sheet is in a stretching state, so that the risk of wrinkling can be reduced, and the four-curved-surface glass cover plate with a pure four-curved shape with four sides in natural transition can be realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic diagram showing that wrinkles occur in four corner positions due to extrusion when a four-curved glass cover plate is thermally bent on four curved surfaces.
Fig. 2 is a schematic diagram of four corner opening shrinkage hot bending forming of a four-curved glass cover plate.
FIG. 3 is a schematic illustration of hot bending by a four corner opening shrinkage process.
Fig. 4 is a flow chart illustrating a method of processing a four-curve glass cover plate according to an exemplary embodiment.
FIG. 5 is a flow chart illustrating an implementation of a method for performing a curvature forming process on a molten glass raw material to obtain a quadric-curved glass raw sheet having a first curvature, according to an exemplary embodiment.
Fig. 6 shows a schematic diagram of a large plate glass molding master as shown in an exemplary embodiment of the present disclosure.
Fig. 7 illustrates a schematic diagram of a hot-bending process according to an exemplary embodiment of the present disclosure.
Fig. 8 is a schematic structural view of a four-curved glass cover plate processing apparatus according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
The embodiment of the disclosure relates to a processing technology of a four-curved-surface glass cover plate of a curved-surface display screen used by a terminal such as a smart phone. In order to optimize the appearance of the curved surface display screen, the ideal shape of the four-curved surface glass cover plate is a pure four-curved shape with four sides naturally transiting, such as the shape of a pure four-curved surface 'soapbox'. However, when the four-curved-surface glass cover plate is processed by using the single-sheet glass hot bending forming process in the related art, cracks and wrinkles appear at four corners of the four-curved-surface glass cover plate due to extrusion, and as shown in fig. 1, the four-curved-surface glass cover plate is difficult to be made into an ideal shape of a pure four-curved-surface soap box.
Further, the four-corner opening material shrinking method shown in fig. 2 is adopted in the related art to reduce the risk of wrinkles. The risk of wrinkling can be reduced due to the fact that the four-corner openings can avoid squeezing. However, when the hot bending forming is performed by adopting the method of shrinking materials at four corners, dynamic bending and static bending are required by adopting the mode shown in fig. 3, for the overall appearance of the four-curved-surface glass cover plate, the transition experience of curves and display pictures at corner positions is poor, the bright screen display transition is vivid and hard, the corner transition of the glass cover plate is replaced by a metal middle frame, and the corner hand feeling is not as round as that of a pure middle frame of a conventional product.
In view of the above, the embodiments of the present disclosure provide a method for processing a four-curved glass cover plate, which forms a molten glass raw material into a four-curved glass raw sheet with a larger curvature, and can form the four-curved glass raw sheet with a larger curvature according to the process limit. And performing hot bending forming processing on the original sheet of the four-curved-surface glass with the larger curvature to form the required four-curved-surface glass cover plate with the smaller curvature. The surface of the original glass sheet with four curved surfaces is in a stretching state from large curvature hot bending to small curvature hot bending, so that the risk of wrinkling can be reduced, and the pure four-curved-surface glass cover plate with four sides in natural transition can be realized.
For convenience of description in the embodiments of the present disclosure, the curvature of the original sheet of the four-curved glass formed in the molten state is referred to as a first curvature, and the curvature of the four-curved glass cover plate required after the hot bending forming process is referred to as a second curvature. Wherein the first curvature is greater than the second curvature.
Further, the four-curved glass Cover plate in the embodiments of the present disclosure is sometimes referred to as Cover glass, abbreviated as CG.
Fig. 4 is a flowchart illustrating a method of processing a four-curved glass cover plate according to an exemplary embodiment, and as shown in fig. 4, the method of processing a four-curved glass cover plate includes the following steps.
In step S11, a glass raw material of the four-curved glass cover plate is melted in a high-temperature melting furnace.
In the embodiment of the disclosure, CG glass raw materials meeting requirements are subjected to hot melting softening in a high-temperature melting furnace 1, so that the glass raw materials are changed from a solid state to a molten state glass 2. The molten glass raw material has higher plasticity than the solid glass raw material. The molten glass log is easier to form into a glass log sheet having a first curvature.
In step S12, a curvature molding process is performed on the molten glass raw material to obtain a four-curved-surface glass raw sheet having a first curvature.
In step S13, a hot bending process is performed on the original sheet of the four-curved glass having the first curvature, to obtain a four-curved glass cover plate having the second curvature.
In the embodiment of the disclosure, the molten glass raw material is utilized to form the four-curved-surface glass raw sheet with the first curvature, and the molten glass raw material has high plasticity, so that the four-curved-surface glass raw sheet with the first curvature can be formed according to the process limit. The four-curved-surface glass cover plate with the second curvature is formed by performing hot bending forming processing on the four-curved-surface glass raw sheet with the first curvature, and the surface of the four-curved-surface glass raw sheet is in a stretching state, so that the risk of wrinkling can be reduced, and the four-curved-surface glass cover plate with a pure four-curved shape with four sides in natural transition can be realized.
Further, from the large-curvature four-curved-surface glass cover plate to the small-curvature compression molding, the glass hot bending material is piled on the outer surface of the four-curved-surface glass cover plate, and secondary processing is easy, so that the product yield is improved, and the production cost of the four-curved-surface glass cover plate is reduced.
In the embodiment of the disclosure, when the molten glass raw material is subjected to curvature forming processing to form the four-curved-surface glass raw sheet, a mother plate with a die cavity can be adopted.
FIG. 5 is a flow chart illustrating an implementation of a method for performing a curvature forming process on a molten glass raw material to obtain a quadric-curved glass raw sheet having a first curvature, according to an exemplary embodiment. Referring to fig. 5, the process of performing the curvature forming process on the molten glass raw material includes the following steps.
In step S121, the molten glass log is vertically drawn down and tiled into the cavities of a molding master.
Wherein, the die cavity shape of the master plate is the same as the shape of the original glass sheet with the four curved surfaces with the first curvature.
In the embodiments of the present disclosure, in order to form the molten glass raw material into the four-curved-surface glass raw sheet conforming to the shape of the mold cavity, a manner of vertically drawing and tiling the molten glass raw material to the mold cavity of the molding master is adopted.
In step S122, the molten glass raw material laid flat in the cavity is cooled and solidified to obtain a four-curved-surface glass raw sheet having a first curvature.
It can be appreciated that in order to reduce the complexity of the subsequent process in the embodiments of the present disclosure, when manufacturing the four-curved-surface glass raw sheet with the first curvature, the four-curved-surface glass raw sheet with the limit curvature conforming to the first curvature is manufactured according to the process limit.
In one implementation of the disclosed embodiments, in order to improve the processing efficiency of the glass cover plate, a large-plate glass molding master is used for curvature molding processing. Correspondingly, the four-curved-surface glass raw sheet obtained after the curvature forming processing is in the form of a large-plate glass raw sheet.
In the embodiment of the disclosure, the size of the large plate glass molding mother plate can be determined according to the size of a glass molding machine, the number of the die cavities in the large plate glass molding mother plate can be determined according to the number of the four-curved-surface glass raw sheets processed by one-time curvature molding, and generally, the number of the die cavities in the large plate glass molding mother plate is required to be consistent with the number of the four-curved-surface glass raw sheets processed by one-time curvature molding, or the number of the die cavities in the large plate glass molding mother plate is required to be larger than the number of the four-curved-surface glass raw sheets processed by one-time curvature molding.
Fig. 6 shows a schematic diagram of a large plate glass molding master as shown in an exemplary embodiment of the present disclosure. It will be appreciated that the number of mold cavities 9 in the large glass plate molding die shown in fig. 6 is only illustrative, and the number of mold cavities in the large glass plate molding master used in practice is not limited to the number shown in fig. 6, and is determined according to the number of the four-curved glass raw sheets processed by one-time curvature molding.
It can be appreciated that in the embodiments of the present disclosure, the curvature molding process is performed using the molten glass raw material of the large-plate glass molding master, and the obtained four-curved glass raw sheet includes a plurality of four-curved glass raw sheets.
When the hot bending forming processing procedure is needed to be carried out on the four-curved-surface glass raw sheet in the form of the large-plate glass raw sheet in the subsequent process, the graphite mold can be adopted to correspondingly open the mold of the four-curved-surface glass raw sheet formed by one-time hot bending processing, and the graphite mold of the four-curved-surface glass cover plate after opening the mold is utilized to carry out the one-time hot bending forming processing procedure on the corresponding four-curved-surface glass raw sheet, so as to obtain the four-curved-surface glass cover plate with the second curvature.
The number of the primary glass sheets with four curved surfaces formed by one-time hot bending in the embodiment of the disclosure can be set according to actual conditions. In one embodiment, in the embodiment of the disclosure, when the four-curved-surface glass raw sheet in the form of the large-plate glass raw sheet needs to be subjected to a hot bending forming processing procedure in a subsequent process to obtain the four-curved-surface glass cover plate with the second curvature, the graphite mold of the four-curved-surface glass cover plate can be opened corresponding to the large-plate glass raw sheet, and each four-curved-surface glass raw sheet in the large-plate glass raw sheet is subjected to a one-time hot bending forming processing procedure by utilizing the opened four-curved-surface glass cover plate graphite mold to obtain the four-curved-surface glass cover plate with the second curvature.
In another embodiment, in the embodiment of the disclosure, when the four-curved-surface glass raw sheet in the form of the large-plate glass raw sheet is required to be subjected to a hot bending forming processing procedure in a subsequent process to obtain the four-curved-surface glass cover plate with the second curvature, the four-curved-surface glass raw sheet in the form of the large-plate glass raw sheet can be cut, the four-curved-surface glass cover plate graphite mold is opened corresponding to the four-curved-surface glass raw sheet obtained after cutting, and the four-curved-surface glass cover plate graphite mold obtained after opening is utilized to carry out the hot bending forming processing procedure on the four-curved-surface glass raw sheet obtained after cutting to obtain the four-curved-surface glass cover plate with the second curvature. This method is understood to be a hot bending process for batch-wise forming the cut four-curved glass raw sheet.
The four-curved-surface glass raw sheet obtained after cutting in the embodiment of the disclosure comprises one or more four-curved-surface glass raw sheets. When the four-curved-surface glass raw sheets obtained after cutting comprise a plurality of four-curved-surface glass raw sheets, the four-curved-surface glass cover plate graphite mold after mold opening is a large-plate graphite mold, so that the one-time hot bending forming processing procedure is carried out on the plurality of four-curved-surface glass raw sheets obtained after cutting in each batch, and the production efficiency is improved.
It can be understood that, in the embodiment of the present disclosure, when the large-plate graphite mold is used to perform the one-time hot-bending forming process or the batch hot-bending forming process on the plurality of four-curved-surface glass raw sheets obtained after the cutting, the large-plate graphite mold corresponds to the hot-bending processing unit for each glass raw material forming unit (mold cavity) in each large-plate glass forming master respectively, and finally, the hot-bending process (hot-bending forming unit) for each four-curved-surface glass raw sheet is implemented, which is shown in fig. 7.
In the embodiment of the disclosure, a hot bending forming processing procedure is performed on a four-curved-surface glass raw sheet with a first curvature, and the obtained four-curved-surface glass cover plate with a second curvature may have residual material parts such as uneven glass stress and abnormal microcrack. Further, in the embodiment of the disclosure, laser cutting and/or polishing treatment is performed on the remainder part with uneven glass stress and/or abnormal microcrack in the four-curved-surface glass cover plate obtained by hot bending forming processing. The method has the advantages that the defect of the outer surface of the four-curved-surface glass cover plate is easy to treat in a light splitting mode, the large plate glass formed by hot bending is subjected to laser cutting or CNC edging, and then the surface is polished, so that the four-curved-surface glass cover plate with a pure four-curved shape with four sides in natural transition can be easily obtained.
In order to implement the above-mentioned process in the embodiments of the present disclosure, a four-curved-surface glass cover plate processing device 100 is provided. Fig. 8 is a schematic diagram showing a structure of a four-curved glass cover plate processing apparatus 100 according to an exemplary embodiment. Referring to fig. 8, the four-curved glass cover plate processing apparatus 100 includes a high temperature furnace 1, a molding master 2, a glass molding machine 3, a rotating shaft 4, and a slide rail 5. The high-temperature melting furnace 1, the high-temperature melting furnace 1 is used for melting glass raw materials of the four-curved-surface glass cover plate. The molding master 2 has a cavity, and the shape of the cavity is the same as that of the original glass sheet with the first curvature. The glass forming machine 3 pushes out, cuts and overturns the forming master plate 2 through the slide rail 5 and the rotating shaft 4. In one example, the molding master 2 is a large plate glass molding master and the glass molding machine 3 is a large plate glass molding machine.
In the embodiment of the disclosure, the slide rail 5 at the bottom of the large plate glass forming machine 3 is moved close to the high temperature melting furnace 1, so that the large plate glass forming mother plate 2 on the large plate glass forming machine 3 is attached to the vertically downward-pulled molten glass. And cutting molten glass by a large plate glass cutter, and rotating a rotating shaft to uniformly spread the molten glass on a large plate glass forming mother plate. And (3) carrying out molten glass forming through the large plate glass forming mother plate, wherein the formed large plate glass raw sheet has a certain curvature radian (first curvature). In consideration of the factors of subsequent processing, cost and the like, when the four-curved-surface glass raw sheet with the first curvature is formed, the glass raw sheet with the large curvature can be manufactured according to the process limit.
It should be understood that the four-curve glass cover plate processing apparatus 100 shown in fig. 8 in the embodiment of the present disclosure is only schematically illustrated, and the actual structure of the four-curve glass cover plate processing apparatus is not limited. Other components can be included in the actual structure of the four-curve glass cover plate processing device.
It is understood that the term "plurality" in this disclosure means two or more, and other adjectives are similar thereto. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It is further understood that the terms "first," "second," and the like are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the expressions "first", "second", etc. may be used entirely interchangeably. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.
It will be further understood that although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
1. The processing method of the four-curved-surface glass cover plate is characterized by comprising the following steps of:
melting the glass raw material of the four-curved-surface glass cover plate in a high-temperature melting furnace;
performing a curvature forming processing procedure on the molten glass raw material to obtain a four-curved-surface glass raw sheet with a first curvature;
performing a hot bending forming processing procedure on the original four-curved-surface glass sheet with the first curvature to obtain a four-curved-surface glass cover plate with the second curvature;
wherein the first curvature is greater than the second curvature.
2. The method of claim 1, wherein the step of performing a curvature molding process on the molten glass raw material to obtain a sheet of the four-curved glass raw material having a first curvature comprises:
vertically and flatly drawing the molten glass raw material into a die cavity of a molding master plate, wherein the shape of the die cavity is the same as that of the four-curved-surface glass raw sheet with the first curvature;
and cooling and solidifying the molten glass raw material paved in the die cavity to obtain the four-curved-surface glass raw sheet with the first curvature.
3. The method for processing a four-curved-surface glass cover plate according to claim 2, wherein the molding master is a large-plate glass molding master, and the four-curved-surface glass raw sheet obtained after the curvature molding processing is in the form of a large-plate glass raw sheet.
4. The method for manufacturing a four-curved glass cover plate according to claim 3, wherein the step of performing a hot bending process on the four-curved glass sheet having the first curvature to obtain the four-curved glass cover plate having the second curvature comprises:
cutting a four-curved-surface glass raw sheet in a large-plate glass raw sheet form;
correspondingly cutting the obtained four-curved-surface glass raw sheet, and opening a graphite die of the four-curved-surface glass cover plate;
and performing a hot bending forming processing procedure on the cut four-curved-surface glass raw sheet by using the die-opened four-curved-surface glass cover plate graphite die to obtain the four-curved-surface glass cover plate with the second curvature.
5. The method for manufacturing a four-curved glass cover plate according to claim 4, wherein the four-curved glass raw sheets obtained after cutting include one or more four-curved glass raw sheets.
6. The method for manufacturing a four-curved glass cover plate according to claim 3, wherein the step of performing a hot bending process on the four-curved glass sheet having the first curvature to obtain the four-curved glass cover plate having the second curvature comprises:
opening the graphite mold of the four-curved-surface glass cover plate corresponding to the large glass sheet;
and performing one-time hot bending forming processing procedure on each four-curved-surface glass raw sheet in the large-plate glass raw sheet by using the graphite mold of the four-curved-surface glass cover plate after mold opening to obtain the four-curved-surface glass cover plate with the second curvature.
7. The method of any one of claims 4 to 6, wherein the four-curved glass cover plate graphite mold is a large plate graphite mold.
8. The method of claim 1, further comprising:
and carrying out laser cutting and/or polishing treatment on the residual material part with uneven glass stress and/or abnormal microcrack in the four-curved-surface glass cover plate obtained by hot bending forming processing.
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