CN112142301A - Cold-bending glass forming method and cold-bending glass - Google Patents
Cold-bending glass forming method and cold-bending glass Download PDFInfo
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- CN112142301A CN112142301A CN202011008471.9A CN202011008471A CN112142301A CN 112142301 A CN112142301 A CN 112142301A CN 202011008471 A CN202011008471 A CN 202011008471A CN 112142301 A CN112142301 A CN 112142301A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
Abstract
The invention relates to the technical field of glass manufacturing, and discloses a forming method of cold-bending glass and the cold-bending glass, wherein the cold-bending glass comprises a first surface and a second surface, the first surface is a curved convex surface, the second surface is a curved concave surface, the surface compressive stress of the first surface is CS1, the depth of the surface compressive stress layer of the first surface is DoL1, the surface compressive stress of the second surface is CS2, the depth of the surface compressive stress layer of the second surface is DoL2, CS1 is more than CS2, and DoL1 is more than DoL 2. And carrying out first cold-bending treatment in the glass forming preparation process, and/or carrying out second cold-bending treatment after glass forming, and carrying out chemical strength treatment before the second cold-bending treatment to obtain cold-bent glass. The forming method of the cold-bending glass has the characteristics of high yield, high efficiency, low cost and low energy consumption, and can meet the requirements.
Description
Technical Field
The invention relates to the technical field of glass manufacturing, in particular to a forming method of cold-bending glass and the cold-bending glass.
Background
Display cover glasses for mobile phones and tablet computers have undergone 2D, 2.5D, and 3D development processes. With the development of new application fields, display glass gradually develops to the fields of automobile glass and automobile curved surface display touch glass. The glass for the automobile and the curved surface display touch glass for the automobile are mostly curved surface glass and have larger area, the traditional 3D hot bending forming process of the mobile phone and the tablet personal computer cannot meet the requirements of the glass for the automobile and the curved surface display touch glass for the automobile, and the problems that the hot bending forming process cannot realize the forming of curved surfaces with ultra-large size, the forming yield is very low, the cost is high, the energy consumption is high, and the hot bending forming process is required to be near a softening point, so that the optical distortion is easily generated exist.
Therefore, it is urgently needed to design a forming method of cold-bending glass, so that the forming method has the characteristics of high yield, high efficiency, low cost and low energy consumption, and can meet the requirements of automobile glass and automobile display touch glass.
Disclosure of Invention
The invention aims to provide a forming method of cold-bending glass and the cold-bending glass, which have the characteristics of high yield, high efficiency, low cost and low energy consumption and can meet the requirements of automobile glass and automobile display touch glass.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a forming method of cold-bending glass, wherein the cold-bending glass comprises a first surface and a second surface, the first surface is a curved convex surface, the second surface is a curved concave surface, first cold-bending treatment is carried out in the glass forming preparation process, and/or second cold-bending treatment is carried out after the glass is formed, and chemical strengthening treatment is carried out before the second cold-bending treatment, so that the cold-bending glass is obtained.
According to the forming method of the cold-bending glass, the first cold-bending treatment is carried out in the glass forming preparation process, and/or the second cold-bending treatment is carried out after the glass is formed, and chemical strong treatment is carried out before the second cold-bending treatment to obtain the cold-bending glass.
As a preferable mode of the above-described forming method of cold-bent glass, the first cold-bending treatment performed in the glass forming production process includes structural relaxation and/or surface dealkalization.
The first cold bending treatment is realized by performing structural relaxation and/or surface dealkalization in the glass forming preparation process, and the operation is simple and convenient in the glass forming preparation process, and the preparation is easy.
As a preferable mode of the method for forming cold-bent glass, the structure relaxing step includes:
and cooling the glass, wherein the cooling rate of the second surface is greater than that of the first surface.
Through carrying out cooling treatment to glass, and the cooling rate to the second surface is greater than the cooling rate to the first surface to realize that the first surface forms crooked convex surface, the second surface forms crooked concave surface.
In a preferred embodiment of the method for forming cold-bent glass, the surface dealkalization is performed on the second surface.
As a preferable mode of the above method for forming cold-bent glass, the second cold-bending treatment performed after the glass forming includes chemical etching and/or mechanical grinding.
And the second cold bending treatment of the glass is realized by chemical etching and/or mechanical grinding after the glass is formed, so that the operation is convenient.
As a preferable mode of the method for forming cold-bent glass, the first surface and/or the second surface is subjected to a second cold-bending treatment after glass forming.
And performing second cold bending treatment on the first surface and/or the second surface after the glass is formed, wherein the first surface or the second surface can be subjected to corresponding cold bending treatment according to requirements so as to realize the bending of the glass.
The invention also provides cold-bending glass, which comprises a first surface and a second surface, wherein the first surface is a curved convex surface, the second surface is a curved concave surface, the surface compressive stress of the first surface is CS1, the surface compressive stress depth of the first surface is DoL1, the surface compressive stress of the second surface is CS2, and the surface compressive stress depth of the second surface is DoL2, wherein CS1 is more than CS2, and DoL1 is more than DoL 2.
This cold-bending glass includes first surface and second surface, and the first surface is crooked convex surface, and the second surface is crooked concave surface, through the setting of surface compressive stress and surface compressive stress depth of layer to obtain the cold-bending glass who has certain curved morphology, can satisfy the user demand.
As a preferable mode of the cold-bending glass, the first surface and the second surface have a compressive stress value range of: 100MPa-1500 MPa.
As a preferable aspect of the cold-bent glass, the thickness ranges of the surface compressive stress layers of the first surface and the second surface are: 5-200 μm.
As a preferable aspect of the cold-bending glass, the radius of curvature of the cold-bending glass is in the range of: 50mm-10000 mm.
The invention has the beneficial effects that:
according to the forming method of the cold-bending glass, the first cold-bending treatment is carried out in the glass forming preparation process, and/or the second cold-bending treatment is carried out after the glass is formed, and chemical strengthening treatment is carried out before the second cold-bending treatment, so that the cold-bending glass is obtained.
The cold-bending glass provided by the invention comprises a first surface and a second surface, wherein the first surface is a curved convex surface, the second surface is a curved concave surface, and the cold-bending glass with a certain curved shape can be obtained by setting the surface compressive stress and the depth of a surface compressive stress layer, so that the use requirement can be met.
Drawings
FIG. 1 is a schematic structural view of a cold-bent glass provided in accordance with an embodiment of the present invention;
FIG. 2 is a flow chart of cold-bending glass according to a third embodiment of the present invention;
FIG. 3 is a flow chart of cold-bending glass according to a fourth embodiment of the present invention;
FIG. 4 is a flow chart of cold-bending glass according to the fifth embodiment of the present invention.
In the figure:
100. a first surface; 200. a second surface.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The first embodiment is as follows:
the present embodiment provides a cold-bending glass, as shown in fig. 1, including a first surface 100 and a second surface 200, where the first surface 100 is a curved convex surface, the second surface 200 is a curved concave surface, the surface compressive stress of the first surface 100 is CS1, the depth of the surface compressive stress layer of the first surface 100 is DoL1, the surface compressive stress of the second surface 200 is CS2, and the depth of the surface compressive stress layer of the second surface 200 is DoL2, where CS1 > CS2, and DoL1 > DoL 2. CS2 and DoL2 may or may not be 0. The cold-bending glass comprises a first surface 100 and a second surface 200, wherein the first surface 100 is a curved convex surface, the second surface 200 is a curved concave surface, the strengthening performance of the first surface 100 is superior to that of the second surface 200, and the cold-bending glass with a certain bending form can be obtained by setting the surface compressive stress and the depth of a surface compressive stress layer, so that the use requirement can be met.
Wherein, the range of the compressive stress values of the first surface 100 and the second surface 200 is: 100MPa-1500 MPa. The surface compressive stress layer thickness ranges of the first surface 100 and the second surface 200 are: 5-200 μm. The radius of curvature range of the cold-bent glass is as follows: 50mm-10000 mm.
The cold-bending glass comprises the following chemical components in percentage by mass: SiO 22 55-72％，B2O3 0-3％，Al2O3 4.5-25％，CaO 0-5％，MgO 3-12％，Li2O 0-6％，K2O 0-5％，Na210-18% of O; simultaneously, the sum of CaO and MgO is not more than 12 percent, Li2O、K2O and Na2The sum of O is not more than 20 percent.
The cold-bending glass also comprises the following chemical components in percentage by mass: SiO 22 45-72％，B2O3 0-5％，P2O5 0-8％，Al2O3 15-30％，ZnO 0-6％，MgO 0-10％，Li2O 0-5％，K2O 0-5％，Na25 to 15 percent of O; simultaneously, the sum of ZnO and MgO is not more than 10 percent, and Li2O、K2O and Na2The sum of O is not more than 20 percent.
Example two:
the embodiment provides a forming method of cold-bending glass, which is used for preparing the cold-bending glass in the first embodiment, and the first cold-bending treatment is carried out in the glass forming preparation process, and/or the second cold-bending treatment is carried out after the glass is formed, and chemical strengthening treatment is carried out before the second cold-bending treatment, so that the cold-bending glass is obtained. The forming method of the cold-bending glass does not need to be heated to the position near the softening point of the glass, has the characteristics of high yield, high efficiency, low cost and low energy consumption, and can meet the requirements of automobile glass and automobile display touch glass.
The first cold-bending treatment in the glass forming preparation process comprises structure relaxation and/or surface dealkalization so as to realize the first cold-bending treatment, and the operation in the glass forming preparation process is simple and convenient, and the preparation is easy.
Specifically, the structure relaxing step includes cooling the glass at a rate greater than the rate of cooling of the first surface 100 at the second surface 200. By cooling the glass, and the cooling rate of the second surface 200 is greater than that of the first surface 100, the first surface 100 forms a curved convex surface, and the second surface 200 forms a curved concave surface.
The second cold bending treatment after the glass forming comprises chemical etching and/or mechanical grinding so as to realize the second cold bending treatment of the glass, and the operation is convenient.
And performing surface dealkalization on the second surface 200 to realize bending of the glass, performing dealkalization treatment on the glass to ensure that the alkali metal content of the second surface is less than that of the first surface, and after chemical strengthening, realizing that the first surface 100 forms a convex bending surface and the second surface 200 forms a concave bending surface. It should be noted that a chemically strong treatment is required before the second cold-bending treatment to enhance the strengthening property of the glass surface.
Example three:
the embodiment provides a forming method of cold-bending glass, and the embodiment is a further improvement on the second embodiment. Specifically, as shown in fig. 2, the forming method of the cold-bending glass includes the steps of:
and S31, performing first cold bending treatment in the glass forming preparation process.
The first cold-bending treatment comprises structural relaxation and/or surface dealkalization. The glass can be processed by a single cold bending processing mode in the glass forming preparation process, and can also be processed by matching two cold bending processing modes. The cold bending treatment can be carried out by adopting simple structure relaxation or surface dealkalization, and the cold bending treatment can also be carried out on the glass by adopting the structure relaxation and the surface dealkalization. Specifically, the selection may be performed as needed.
The structural relaxation cools the glass at a rate greater for the second surface 200 than for the first surface 100. By cooling the glass, and the cooling rate of the second surface 200 is greater than that of the first surface 100, the first surface 100 forms a curved convex surface, and the second surface 200 forms a curved concave surface.
Surface dealkalization is performed at the second surface 200.
And S32, chemically strengthening the glass after the first cold bending treatment.
Specifically, the chemical strengthening treatment can be carried out by adopting a one-step method, wherein the molten salt is pure potassium nitrate molten liquid, the strengthening temperature is 380-. The chemical strengthening treatment also adopts a two-step method for strengthening, wherein the first-step strengthening molten salt is pure sodium nitrate or mixed molten liquid of sodium nitrate and potassium nitrate, the strengthening temperature is 380-550 ℃, and the strengthening time is 30-500 min; the second step of strengthening molten salt is mixed molten liquid of sodium nitrate and potassium nitrate, the strengthening temperature is 380-550 ℃, and the strengthening time is 5-120 min.
Example four:
the embodiment provides a forming method of cold-bending glass, and the embodiment is a further improvement on the second embodiment. Specifically, as shown in fig. 3, the forming method of the cold-bending glass includes the steps of:
and S41, chemically strengthening the formed glass.
Specifically, the chemical strengthening treatment can be carried out by adopting a one-step method, wherein the molten salt is pure potassium nitrate molten liquid, the strengthening temperature is 380-. The chemical strengthening treatment also adopts a two-step method for strengthening, wherein the first-step strengthening molten salt is pure sodium nitrate or mixed molten liquid of sodium nitrate and potassium nitrate, the strengthening temperature is 380-550 ℃, and the strengthening time is 30-500 min; the second step of strengthening molten salt is mixed molten liquid of sodium nitrate and potassium nitrate, the strengthening temperature is 380-550 ℃, and the strengthening time is 5-120 min.
And S42, performing second cold-bending treatment on the chemically strengthened glass.
The first cold-bending treatment is not performed during the glass forming preparation process, but the second cold-bending treatment is performed on the glass after the chemical strengthening.
The second cold bending treatment comprises chemical etching and/or mechanical grinding, and can be carried out in a single cold bending treatment mode after chemical strengthening, or can be carried out in a matching way through two cold bending treatments. The cold bending treatment can be carried out by simply adopting chemical etching or mechanical grinding, the cold bending treatment can also be carried out by adopting chemical etching and mechanical grinding, and particularly, the cold bending treatment can be selected according to requirements.
Optionally, after the glass is formed, only the first surface 100 may be subjected to the second cold bending treatment, only the second surface 200 may be subjected to the second cold bending treatment, and of course, both the first surface 100 and the second surface 200 may be subjected to the second cold bending treatment, and the specific operation may be set as required.
Example five:
the embodiment provides a forming method of cold-bending glass, and the embodiment is a further improvement on the second embodiment. Specifically, as shown in fig. 4, the forming method of the cold-bending glass includes the steps of:
and S51, performing first cold bending treatment in the glass forming preparation process.
The first cold bending processing in this embodiment is the same as the first cold bending processing in the second embodiment, and is not described herein again.
And S52, chemically strengthening the glass after the first cold bending treatment.
And S53, performing second cold-bending treatment on the chemically strengthened glass.
It is also possible to carry out the chemical strength again after the second cold-bending treatment to strengthen the cold-bent glass properties.
The second cold bending processing in this embodiment is the same as the second cold bending processing in the third embodiment, and is not described herein again.
In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in a descriptive sense or a positional relationship based on the orientation shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The forming method of the cold-bending glass is characterized in that the cold-bending glass comprises a first surface (100) and a second surface (200), the first surface (100) is a convex surface, the second surface (200) is a concave surface, first cold-bending treatment is carried out in the glass forming preparation process, and/or second cold-bending treatment is carried out after the glass is formed, and chemical strengthening treatment is carried out before the second cold-bending treatment, so that the cold-bending glass is obtained.
2. A method of forming cold-bent glass according to claim 1, wherein the first cold-bending treatment performed during the glass forming preparation process includes structural relaxation and/or surface dealkalization.
3. A method of forming cold-bent glass according to claim 2, wherein the structure relaxing step comprises:
and cooling the glass, wherein the cooling rate of the second surface (200) is greater than that of the first surface (100).
4. A method of forming cold-bent glass according to claim 2, characterised in that the surface dealkalization is carried out at the second surface (200).
5. A method of forming cold-bent glass according to claim 1, wherein the second cold-bending treatment performed after the glass is formed comprises chemical etching and/or mechanical grinding.
6. A method of forming cold-bent glass according to claim 5, characterised in that the second cold-bending treatment is applied to the first surface (100) and/or the second surface (200) after glass forming.
7. A cold-bent glass, comprising a first surface (100) and a second surface (200), wherein the first surface (100) is convex and the second surface (200) is concave and the surface compressive stress of the first surface (100) is CS1, the surface compressive stress depth of layer of the first surface (100) is DoL1, the surface compressive stress of the second surface (200) is CS2, the surface compressive stress depth of layer of the second surface (200) is DoL2, wherein CS1 > CS2 and DoL1 > DoL 2.
8. The cold-bent glass according to claim 7, wherein the first surface (100) and the second surface (200) have a range of compressive stress values: 100MPa-1500 MPa.
9. The cold-bent glass according to claim 7, wherein the surface compressive stress layer thickness ranges of the first surface (100) and the second surface (200) are: 5-200 μm.
10. The cold-formed glass according to claim 7, wherein the radius of curvature of the cold-formed glass is in the range of: 50mm-10000 mm.
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| CN202011008471.9A CN112142301B (en) | 2020-09-23 | 2020-09-23 | Cold-bending glass forming method and cold-bending glass |
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| CN115159820A (en) * | 2022-07-12 | 2022-10-11 | 河北视窗玻璃有限公司 | Glass insert cold bending device and using method thereof |
| CN115548136A (en) * | 2022-11-28 | 2022-12-30 | 天津耀皮工程玻璃有限公司 | Tooth surface BIPV photovoltaic laminated glass |
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| CN112142301B (en) | 2023-01-03 |
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