CN109160718B - Preparation method of curved glass - Google Patents
Preparation method of curved glass Download PDFInfo
- Publication number
- CN109160718B CN109160718B CN201811328370.2A CN201811328370A CN109160718B CN 109160718 B CN109160718 B CN 109160718B CN 201811328370 A CN201811328370 A CN 201811328370A CN 109160718 B CN109160718 B CN 109160718B
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- protective layer
- glass body
- glass
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- hot bending
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- 239000011521 glass Substances 0.000 title claims abstract description 170
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000011241 protective layer Substances 0.000 claims abstract description 86
- 238000013003 hot bending Methods 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000007547 defect Effects 0.000 claims abstract description 19
- 239000010410 layer Substances 0.000 claims description 57
- 238000002955 isolation Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 claims 1
- 238000005452 bending Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000005400 gorilla glass Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Images
Classifications
-
- 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
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/0302—Re-forming glass sheets by bending by press-bending between shaping moulds between opposing full-face shaping moulds
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention belongs to the technical field of curved glass preparation, and particularly relates to a preparation method of curved glass. The invention discloses a preparation method of curved glass, aiming at solving the problems of low preparation efficiency and poor quality caused by the defects of a glass body in the preparation process when the curved glass is prepared by adopting a hot bending process. The preparation method comprises the following steps: step S1, arranging a protective layer outside the glass body; step S2, performing hot bending processing on the glass body; and step S3, removing the protective layer to obtain the final curved glass. The method for processing and preparing the curved glass can improve the efficiency of preparing the curved glass and the quality of the curved glass finally obtained.
Description
Technical Field
The invention belongs to the technical field of curved glass preparation, and particularly relates to a preparation method of curved glass.
Background
In the existing curved glass, a finished product is made into a glass plate with a curved radian after a flat glass is processed by a mold or a cutter through mold or machine equipment. The glass hot bending processing by means of the mold is the most common process mode for preparing curved glass at present.
In the actual processing process of curved glass by adopting a glass hot bending process, the defect problems such as pockmarks, indentations, scratches and the like are easily caused on the surface of the glass body due to the influence of high temperature and high pressure during the forming of the glass body and the processing errors on the surface of a mould, and at the moment, the defect treatment needs to be carried out by means of a subsequent grinding process so as to ensure the quality of the curved glass finally obtained. However, the bent glass is treated by the grinding process, so that the workload of the whole preparation process is increased, the processing efficiency of the curved glass is reduced, the defects are increased along with the improvement of the structural complexity of the mold and the abrasion of the mold after long-time use in the preparation process, even the defect of 0.05-0.1 mm depth occurs, and how to continue to treat the defects by the subsequent grinding process at the moment most possibly influences the finished product size requirement of the curved glass and influences the quality of the curved glass. Meanwhile, although the bending complexity of the curved glass is improved, the requirement on defect polishing equipment is higher and higher, so that the cost of defect polishing treatment is increased.
Disclosure of Invention
The invention provides a preparation method of curved glass, aiming at solving the problems of low preparation efficiency and poor quality caused by the defects of a glass body in the preparation process when the curved glass is prepared by adopting a hot bending process. The preparation method comprises the following steps:
step S1, arranging a protective layer outside the glass body; selecting a material with the hot bending performance similar to that of the glass body as a protective layer, and flatly arranging the protective layer on the surface of the glass body, wherein the thickness of the protective layer is not less than the thickness of a defect generated in the hot bending process;
step S2, performing hot bending processing on the glass body; putting the glass body provided with the protective layer into a mould for hot bending processing, so that the protective layer is subjected to synchronous hot bending processing along with the glass body;
step S3, removing the protective layer; and after the hot bending processing treatment of the glass body is completed, taking out the hot bending formed glass body, and removing the protective layer on the surface to obtain the final curved glass.
Preferably, in step S1, the thickness of the glass sheet is selected to be as thin as possible, provided that the depth of the blocking defect is satisfied.
Preferably, in step S1, a glass plate made of the same material as the glass body is used as the protective layer.
Preferably, in step S1, the protective layer is provided on both front and back surfaces of the glass body, or on one surface of the glass body.
Preferably, in step S3, the protective layer glass plate is broken and removed by water hammer; the glass body with the protective layer on the surface after hot bending is integrally heated, and then water mist is sprayed to the surface of the protective layer, so that the protective layer at high temperature is broken and falls off when meeting water, and the protective layer is cleaned.
Preferably, in step S1, the method further includes disposing an isolation layer; firstly, arranging an isolation layer on the surface of a glass body, and then arranging a protective layer on the surface of the isolation layer; the isolating layer is a coating which is not sticky with glass in a high-temperature environment and is easy to dissolve in weak acid or weak base.
More preferably, the isolating layer consists of 1-4% by mass of graphite, 25-35% by mass of silicon dioxide and 61-74% by mass of alumina, and is formed by mixing and stirring silica sol; wherein the mass ratio of the silica sol to the alumina is 1: 2.
Further preferably, in the step S1, the surface of the glass body is firstly cleaned and preheated to 40 ℃, then the isolating layer coating is uniformly applied to the surface of the glass body, and then the glass body is heated to 180 ℃ again, so that the coating layer is solidified and naturally cooled, thereby obtaining the isolating layer.
Further preferably, the thickness of the isolation layer is 4-6 μm.
Preferably, the method further comprises step S4, cleaning and removing the isolation layer; and after the protective layer is removed, the glass body with the isolating layer is placed into weak acid solution or weak base solution to remove the isolating layer, so that the final curved glass is obtained.
When the method is adopted for preparing the curved glass, the method has the following beneficial effects:
1. in the invention, a layer of glass plate which has a certain thickness and has similar hot bending performance with the glass body is arranged on the surface of the glass body to be used as a protective layer. Like this, not only can utilize the similar hot bending performance that possesses between protective layer and the glass body, avoid the protective layer to the hot bending resistance of glass body, guarantee the precision of the hot bending processing of glass body, moreover in the hot bending in-process with the help of the protective layer that has certain thickness can effectual separation hot bending in-process produce defect and the contact between the glass body to avoid the contact of defect and glass body, improve the quality of the hot bending processing of glass body.
2. According to the invention, by using the glass plate as the protective layer, the glass plate can ensure that the glass plate has similar hot bending performance with the glass body, synchronous hot bending deformation is realized, the bending effect of the glass body is ensured, and the protective layer can be rapidly removed by utilizing impact breakage caused by water mist and a high-temperature protective layer after the hot bending treatment of the glass body is completed, so that the removal efficiency and quality of the protective layer are improved, meanwhile, the removal treatment of the protective layer with more complicated bending degree can be met, and the quality of the final curved glass is ensured.
3. In the invention, the isolating layer which is not sticky with the glass and is easy to dissolve in weak acid or weak base under a high-temperature environment is arranged between the glass body and the protective layer, so that the direct contact between the glass body and the protective layer is avoided. Therefore, the problem of hot adhesion possibly occurring between the glass body and the protective layer in a high-temperature environment can be avoided, the reliability of hot bending protection of the glass body by adopting the glass plate as the protective layer is guaranteed, and the isolation layer can be rapidly removed by means of weak acid or weak base, so that the quality of curved glass finally obtained by hot bending processing is guaranteed.
Drawings
FIG. 1 is a schematic flow diagram of curved glass production using the method of the present invention;
FIG. 2 is a schematic view of the relationship among the glass body, the isolation layer and the protection layer.
Detailed Description
The technical scheme of the invention is described in detail in the following with reference to the accompanying drawings and embodiments
Referring to fig. 1 and 2, the method for manufacturing the curved Glass of the present invention is described in detail by selecting Gorilla Glass 3 Glass with a thickness of 0.6mm from corning corporation as a Glass body, and the specific operation steps are as follows:
step S1, a protective layer is provided on the outside of the glass body. A plate with the hot bending performance similar to that of the glass body 1 and a certain thickness is selected as a protective layer 2, and the plate is flatly attached to the surface of the glass body 1.
Preferably, in this embodiment, Gorilla Glass 3 Glass with a thickness of 0.2mm from Corning corporation is selected as the protective layer based on the selected mold and the statistical analysis of the depth of hot bending defects in advance. At the moment, the protective layer and the glass body are made of the same material, so that the protective layer has the same hot bending performance as the glass body, the synchronous bending deformation of the protective layer and the glass body is ensured in the subsequent hot bending process, the resistance of the protective layer to the hot bending deformation of the glass body is reduced, and the hot bending treatment effect and quality of the glass body are improved.
In different embodiments, the optimal thickness of the glass plate can be selected as the protective layer according to the defect depth caused by different selected molds and the processing cost. Under the condition that the contact between the blocking defect of the protective layer and the glass body is met, the glass plate with smaller thickness can be selected as the protective layer, so that the bending resistance generated by the protective layer in the hot bending process can be reduced to the maximum extent, the bending precision of the glass body is improved, and the precision and the quality of the finally obtained curved glass are ensured.
Similarly, in other embodiments, a glass plate or a ceramic plate made of other materials can be selected as the protective layer according to the requirements of processing cost, precision and quality, so that the effect of blocking defects generated in the hot bending process is achieved under the condition that the glass body has the hot bending performance similar to that of the glass body, and the protection of the glass body is achieved.
In step S2, the glass body is hot-bent. And putting the whole glass body 1 provided with the protective layer 2 into a mould, and carrying out hot bending processing by means of the mould so as to synchronously carry out hot bending processing treatment on the protective layer 2 along with the glass body 1.
And step S3, removing the protective layer. Accomplish the curved processing of heat of glass body 1 and handle the back, carry out the bulk heating with the curved rear surface of heat glass body 1 that has protective layer 2, wait to heat to spray water smoke to protective layer 2's surface behind the uniform temperature, make protective layer 2's glass board meet water and take place the impact and break to drop by glass body 1's surface, obtain the curved surface glass after the heat is bent.
Preferably, in this embodiment, when 0.2mm Gorilla Glass 3 Glass is used as the protective layer, the Glass body and the protective layer are first heated to 200 ℃, and then water mist of 20 ℃ is sprayed on the surface of the protective layer, so that the protective layer in a high temperature state is subjected to impact fracture when meeting water, and the protective layer on the surface of the Glass body is quickly removed. Wherein, when carrying out the water smoke and spraying, can adopt intermittent pause mode to carry out the water smoke and spray to the volume of spraying of control water smoke controls the protective layer condition of breaking. In addition, according to the difference of protective layer thickness and material, can adjust heating temperature and water smoke temperature to guarantee to clear away the operation fast accurately of protective layer. Likewise, in other embodiments, the removal of the protective layer may be performed in other manners, such as by conventional mechanical polishing.
In addition, as shown in fig. 2, in this embodiment, the protective layers 2 are simultaneously disposed on two surfaces of the glass body 1, so that the two surfaces of the glass body are protected, and the quality of the curved glass is ensured. Similarly, in other embodiments, according to the product requirement, the protective layer can be selectively arranged on only one side of the glass body, so that the manufacturing cost is reduced.
Referring to fig. 1 and 2, in step S1 of this embodiment, an isolation layer 3 is disposed between the glass body 1 and the protection layer 2, that is, a layer of isolation layer is first disposed on the surface of the glass body, and then the protection layer is flatly disposed on the isolation layer to isolate the direct contact between the protection layer and the glass body. Wherein, the isolating layer 3 is a coating which is not sticky with glass in a high-temperature environment and is easy to dissolve in weak acid or weak base.
In the invention, in order to ensure that the protective layer 2 has the hot bending performance similar to that of the glass body 1 and ensure the bending effect and quality of the glass body 1, a glass plate which is extremely similar to the glass body 1 in material is selected as the protective layer 2, so that the problem of hot adhesion between the protective layer 2 and the glass body 1 is extremely easy to occur in the hot bending processing process. At this moment, through setting up the isolation layer and utilizing the isolation layer to effectively keep apart direct contact between glass body and the protective layer to avoid the hot bonding problem between protective layer and the glass body, guaranteed the finished product quality and the effect after final glass body hot-bending treatment.
In the present embodiment, the isolation layer 2 is composed of 1 to 4 mass% of graphite powder, 25 to 35 mass% of silica powder, and 61 to 74 mass% of alumina powder, and is prepared by mixing and stirring silica sol, wherein the mass ratio of silica sol to alumina powder is 1: 2. Firstly, cleaning a glass body, removing grease and impurities on the surface, and preheating to 40 ℃; then, uniformly coating the prepared isolating layer coating on the surface of the glass body to form a coating layer with the thickness of 4-6 microns; and then, heating the glass body to 180 ℃ again to solidify and naturally cool the coating layer, thereby obtaining the isolating layer.
Similarly, in the embodiment, the components of the isolation layer can be adjusted according to the different materials of the glass body and the protective layer and the different hot bending temperatures, so that the requirement that the isolation layer isolates the glass body and the protective layer at the corresponding hot bending temperatures and hot adhesion does not occur is met. For example, when the glass is subjected to the glass hot bending treatment with the maximum temperature of 800 ℃ and the long-time temperature kept within 600 ℃, GN-205AW high-temperature non-stick ceramic nano composite ceramic paint produced by Cannan New materials science and technology Limited in Guangzhou can be directly selected as the isolating layer to isolate and protect the glass body and the protecting layer, so that the problem of hot sticking in the hot bending process is avoided.
Similarly, in other embodiments, the thickness of the isolation layer may be appropriately adjusted according to specific conditions, such as the thickness and material of the glass body, the thickness and material of the protection layer, and the time and temperature of the thermal bending process, so that the isolation layer can provide reliable and effective isolation protection for the glass body and the protection layer during the whole thermal bending process, thereby avoiding the problem of thermal adhesion between the glass body and the protection layer.
In addition, as shown in fig. 1, the method further includes a step S4 of performing a cleaning removal of the isolation layer. In step S4, after the protective layer is removed by the water mist, the glass body 1 with the isolation layer 3 is placed in a weak acid solution or a weak base solution, and the isolation layer 3 on the surface of the glass body 1 is rapidly cleaned and removed, so that the curved glass without the isolation layer impurities on the surface is obtained, and the quality of the final curved glass is ensured.
Preferably, in this embodiment, the protection layer on the surface of the glass body is cleaned by NaOH solution with concentration of 10%, so as to obtain the final curved glass. Similarly, in the embodiment, other weak acid solution or weak base solution may be used to clean and remove the isolation layer according to the adjustment of the components in the isolation layer and the variation of the thickness of the isolation layer.
Claims (8)
1. The preparation method of the curved glass is characterized by comprising the following steps:
step S1, arranging a protective layer outside the glass body; selecting a material with the hot bending performance similar to that of the glass body as a protective layer, and flatly arranging the protective layer on the surface of the glass body, wherein the thickness of the protective layer is not less than the thickness of a defect generated in the hot bending process;
step S2, performing hot bending processing on the glass body; putting the glass body provided with the protective layer into a mould for hot bending processing, so that the protective layer is subjected to synchronous hot bending processing along with the glass body;
step S3, removing the protective layer; after the hot bending processing treatment of the glass body is completed, taking out the hot bending formed glass body, and removing the protective layer on the surface to obtain the final curved glass;
in step S1, a separating layer is further provided; firstly, arranging an isolation layer on the surface of a glass body, and then arranging a protective layer on the surface of the isolation layer; the isolating layer is a coating which is not sticky with glass in a high-temperature environment and is easy to dissolve in weak acid or weak base; the isolating layer consists of 1-4% by mass of graphite, 25-35% by mass of silicon dioxide and 61-74% by mass of alumina, and is formed by mixing and stirring silica sol; wherein the mass ratio of the silica sol to the alumina is 1: 2.
2. The method of claim 1, wherein in step S1, the thickness of the glass sheet is selected to be as thin as possible while satisfying the depth of the barrier defect.
3. The manufacturing method according to claim 1, wherein in the step S1, a glass plate made of the same material as the glass body is used as the protective layer.
4. The manufacturing method according to claim 1, wherein in step S1, the protective layer is provided on both sides of the glass body, or on one side of the glass body.
5. The production method according to claim 4, wherein in the step S3, the protective layer glass sheet is broken and removed by water hammer; the glass body with the protective layer on the surface after hot bending is integrally heated, and then water mist spraying is carried out on the surface of the protective layer, so that the protective layer at high temperature is broken and falls off when meeting water, and the protective layer is cleaned.
6. The preparation method according to claim 1, wherein in the step S1, the surface of the glass body is firstly cleaned and preheated to 40 ℃, then the isolating layer coating is uniformly coated on the surface of the glass body, and then the glass body is heated to 180 ℃ again to solidify and naturally cool the coating layer, thereby obtaining the isolating layer.
7. The method of claim 1, wherein the spacer layer has a thickness of 4 to 6 μm.
8. The method according to claim 1, further comprising a step S4 of cleaning and removing the separation layer; and after the protective layer is removed, the glass body with the isolating layer is placed into weak acid solution or weak base solution to remove the isolating layer, so that the final curved glass is obtained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811328370.2A CN109160718B (en) | 2018-11-09 | 2018-11-09 | Preparation method of curved glass |
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| CN201811328370.2A CN109160718B (en) | 2018-11-09 | 2018-11-09 | Preparation method of curved glass |
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| CN109160718A CN109160718A (en) | 2019-01-08 |
| CN109160718B true CN109160718B (en) | 2021-07-06 |
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| CN111003928A (en) * | 2019-11-22 | 2020-04-14 | 苏州市灵通玻璃制品有限公司 | Production process of 3D curved glass panel |
| CN114685037A (en) * | 2020-12-30 | 2022-07-01 | 富联裕展科技(深圳)有限公司 | Curved surface forming method and curved surface forming device for substrate |
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| EP0317409A1 (en) * | 1987-11-20 | 1989-05-24 | Saint-Gobain Vitrage International | Method and apparatus for the thermal bending of glass |
| CN101321443A (en) * | 2008-07-04 | 2008-12-10 | 福州高意通讯有限公司 | Production method of non-conventional glass as outer casing, and its application in electronic product |
| CN101520547A (en) * | 2009-04-17 | 2009-09-02 | 东南大学 | Method for manufacturing flexure cylindrical mirror condenser |
| CN102531352A (en) * | 2011-12-31 | 2012-07-04 | 刘振中 | Heat-bending tempered one-step-molded condensing lens production process and equipment |
| CN102951791A (en) * | 2012-03-21 | 2013-03-06 | 戴长虹 | Convex-surface low-pressure air glass, flat low-pressure air glass and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105793203B (en) * | 2013-02-20 | 2022-03-01 | 康宁股份有限公司 | Method and apparatus for forming shaped glass articles |
| CN107879642B (en) * | 2017-11-29 | 2020-09-18 | 中国南玻集团股份有限公司 | Curved glass, preparation method thereof and electronic equipment |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0317409A1 (en) * | 1987-11-20 | 1989-05-24 | Saint-Gobain Vitrage International | Method and apparatus for the thermal bending of glass |
| CN101321443A (en) * | 2008-07-04 | 2008-12-10 | 福州高意通讯有限公司 | Production method of non-conventional glass as outer casing, and its application in electronic product |
| CN101520547A (en) * | 2009-04-17 | 2009-09-02 | 东南大学 | Method for manufacturing flexure cylindrical mirror condenser |
| CN102531352A (en) * | 2011-12-31 | 2012-07-04 | 刘振中 | Heat-bending tempered one-step-molded condensing lens production process and equipment |
| CN102951791A (en) * | 2012-03-21 | 2013-03-06 | 戴长虹 | Convex-surface low-pressure air glass, flat low-pressure air glass and preparation method thereof |
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