A processing and preparation technology of foldable cover glass

Abstract

The invention relates to the technical field of cover glass processing, and in particular to a processing and preparation process for foldable cover glass, comprising the following steps: preparing the following materials in percentage by mass, grinding and crushing the materials, removing iron from the mixed raw materials by a magnetic separation method after grinding, pouring the mixed raw materials into a platinum-rhodium alloy crucible after the treatment, heating and melting the mixed raw materials, causing the molten glass liquid to overflow from an overflow trough of the melting furnace, flowing downward along two side walls under the action of gravity, merging at the bottom to form a glass ribbon, slowly pouring the glass into a cast iron mold for molding, placing the glass into an annealing furnace after molding, and performing conventional thinning, strengthening, processing, quality inspection and packaging after cooling to room temperature; the invention provides a glass having a higher strain point, a lower density, a lower thermal expansion coefficient, a larger Young's modulus, a higher tensile strength and a higher flexibility index through the synergistic effect of the components of the glass composition.

Description

Technical Field

[0001] The present invention relates to the technical field of cover glass processing, and in particular to a processing and preparation process for foldable cover glass. Background Art

[0002] With the progress of the times, major manufacturers continue to develop and launch their flagship folding mobile phones, and folding display electronic products have officially entered the electronic product consumer market, and there is great room for development in the future; initially, the folding screen used CPI (transparent polyimide film) material as the protective cover. Due to the poor scratch resistance of CPI material, scratches are prone to appear, and the impact protection ability is weak. It cannot play a protective role when impacted by external forces. Now most major manufacturers use flexible glass to replace CPI material. Flexible glass has extremely high strength, wear resistance and wrinkle resistance, and can effectively protect the screen from damage.

[0003] Existing glass will produce irreversible wrinkles after being folded multiple times, and may even cause the entire or part of the screen to fail or be damaged; and the strain point, density, and thermal expansion coefficient of the glass are relatively inconsistent, reducing the service life of the glass.

[0004] Therefore, in order to address the problem that the above-mentioned glass will produce irreversible wrinkles after being folded multiple times, or even cause the entire or part of the screen to fail or be damaged, a tunnel invert foundation reinforcement component and construction method can be designed. Summary of the invention

[0005] In order to overcome the problem that the glass will produce irreversible wrinkles after multiple folds, or even cause the entire or part of the screen to fail or be damaged.

[0006] The technical solution of the present invention is: a processing and preparation process of a foldable cover glass, comprising the following steps:

[0007] S1: Prepare the following materials in mass percentage: 55% to 65% silicon dioxide, 12% to 20% aluminum oxide, 3% to 15% sodium oxide, 0.5% to 5% potassium oxide, 1% to 5% magnesium oxide, 0.1% to 3% zinc oxide, 0.5% to 4% zirconium dioxide, 0.1% to 6% boron trioxide, 1% to 3% sodium sulfate, and 0.1% to 0.8% carbon powder;

[0008] S2: putting the above materials into a crushing device to fully mix and grind, and after grinding, removing iron from the mixed raw materials by magnetic separation. After the treatment, pouring the mixed raw materials into a platinum-rhodium alloy crucible and heating and melting;

[0009] S3: In the middle and late stages of melting, a clarifier is added to the glass liquid, which decomposes at high temperatures to produce gas, promotes the discharge of bubbles, and makes the glass liquid clearer and more transparent. The glass liquid is slowly stirred with the help of a platinum rod.

[0010] S4: The molten glass overflows from the overflow trough of the melting furnace, flows downward along the two side walls under the action of gravity, converges at the bottom to form a glass ribbon, and is slowly poured into the cast iron mold for molding, and then placed in the annealing furnace;

[0011] S5: After cooling to room temperature, routine thinning, strengthening, processing, quality inspection and packaging are carried out.

[0012] Preferably, the melting temperature is 1500°C, the melting time is 70 minutes, the post-heating temperature is 1680°C, and the holding time is 120 to 150 minutes.

[0013] Preferably, the annealing temperature is 700-750° C., and the annealing time is 2-2.5 h.

[0014] Preferably, a layer of anti-fingerprint coating with low surface energy is deposited on the glass surface; after deposition, a layer of anti-scratch coating with higher hardness is prepared on the glass surface again by chemical vapor deposition or sol-gel method.

[0015] Preferably, the specific processing steps are to use a high-power ultraviolet laser to cut the foldable cover glass, and after cutting, use diamond abrasives and cerium oxide polishing liquid to grind and polish the edges of the cut glass.

[0016] Preferably, the crushing device includes a crushing box, a crushing assembly is provided inside the crushing box, a grinding assembly is provided at the lower right side of the crushing box, support rods are provided at the four corners of the bottom end of the crushing box, the crushing assembly includes a crushing roller 1, the crushing roller 1 is relatively installed inside the crushing box, the input end of the rear end crushing roller 1 is connected to a transmission gear 1, a crushing roller 2 is installed inside the crushing box, and the crushing roller 2 is installed below the crushing roller 1.

[0017] Preferably, a transmission gear 2 is installed at the input end of the rear end crushing roller 2, a transmission belt 1 is connected between the transmission gear 1 and the transmission gear 2, a transmission motor is connected to the left end of the transmission gear 1, a transmission belt 2 is connected between the left sides of the crushing roller 1 and the crushing roller 2, a transmission box is installed on the right side wall of the crushing box, and the transmission belt 2 is arranged in the transmission box.

[0018] Preferably, a guide plate is installed on the right side of the bottom end of the crushing box, a filter plate is arranged at the bottom end of the right side inside the crushing box, and a feed port is arranged at the middle position of the top end of the crushing box.

[0019] Preferably, the grinding assembly includes a grinding box, which is arranged on the right side of the crushing box and at the discharge end of the guide plate. A grinding barrel is installed in the middle position inside the grinding box, and a rotating rod is arranged in the middle position inside the grinding barrel.

[0020] Preferably, a grinding knife is installed symmetrically on the outer side of the rotating rod relative to the center, a mounting frame is provided at the top of the grinding box, a feed hopper is installed at the discharge end of the guide plate, and the feed hopper is provided at the top of the mounting frame, a water tank is installed at the front end of the crushing box, and a water inlet pipe is connected between the water tank and the crushing box.

[0021] The beneficial effects of the present invention are as follows: silicon dioxide: forms a tetrahedral network structure of the glass body, giving the glass higher hardness, strength and stability; aluminum oxide: strengthens the network structure of the glass body, improves the mechanical properties of the glass, and reduces the thermal expansion coefficient of the glass; magnesium oxide: improves the chemical stability of the glass and adjusts the viscosity of the glass; zinc oxide: increases the chemical stability of the glass, reduces the thermal expansion coefficient, and improves the heat resistance stability of the glass; zirconium dioxide: improves the chemical stability of the glass, increases the hardness and elastic modulus of the glass, and reduces the thermal expansion coefficient of the glass; boron trioxide: improves the chemical stability of the glass Qualitative, reduce the thermal expansion coefficient of glass, reduce the glass density, and reduce the melting temperature of glass; Glauber's salt + carbon powder: reduce the melting temperature of glass, clarify the glass liquid, and an appropriate amount of carbon powder can reduce the thermal expansion coefficient of glass and promote the melting of glass; through the synergistic effect of various components, the UTG foldable screen cover glass made from it reaches 0.05-0.15mm, and after post-processing, chemical strengthening and other treatments, it has extremely strong anti-bending properties, extremely high mechanical properties and low thermal expansion coefficient. The maximum minimum bending radius R﹤1.5mm, static bending 300,000 times without breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a first three-dimensional structural schematic diagram of a processing and manufacturing device for a foldable cover glass according to the present invention;

[0023] Figure 2 Shown is a second three-dimensional structural schematic diagram of the processing and manufacturing device of the foldable cover glass of the present invention;

[0024] Figure 3 Shown is a schematic diagram of a cross-sectional three-dimensional structure of a processing and manufacturing device for a foldable cover glass according to the present invention;

[0025] Figure 4 Shown is a first three-dimensional structural schematic diagram of a crushing assembly of a processing and manufacturing device for foldable cover glass of the present invention;

[0026] Figure 5 Shown is a second three-dimensional structural schematic diagram of a crushing assembly of the processing and manufacturing device for foldable cover glass of the present invention;

[0027] Figure 6 Shown is a schematic diagram of the three-dimensional structure of the grinding assembly of the processing and preparation device for the foldable cover glass of the present invention.

[0028] Explanation of the reference numerals: 1. Crushing box; 2. Support rod; 301. Crushing roller one; 302. Transmission gear one; 303. Crushing roller two; 304. Transmission gear two; 305. Transmission belt one; 306. Transmission motor; 307. Transmission belt two; 308. Transmission box; 309. Guide plate; 310. Filter plate; 311. Feed port; 401. Grinding box; 402. Grinding barrel; 403. Rotating rod; 404. Grinding knife; 405. Mounting frame; 406. Feed hopper; 407. Water tank; 408. Water inlet pipe. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] See also Figure 1 - Figure 6 The present invention provides an embodiment: a processing and preparation process for a foldable cover glass, comprising a crushing box 1, a support rod 2, a crushing assembly and a grinding assembly, wherein the crushing box 1 is provided with a crushing assembly inside, a grinding assembly is provided at the lower right side of the crushing box 1, and support rods 2 are provided at the four corners of the bottom end of the crushing box 1, and the crushing assembly comprises a crushing roller 1 301, which is relatively installed inside the crushing box 1, and the input end of the rear end crushing roller 1 301 is connected to a transmission gear 1 302, and a crushing roller 2 303 is installed inside the crushing box 1, and the crushing roller 2 303 is installed below the crushing roller 1 301.

[0031] See also Figure 4 - Figure 5 In this embodiment, a transmission gear 2 304 is installed at the input end of the rear end crushing roller 2 303, a transmission belt 1 305 is connected to the transmission gear 1 302 and the transmission gear 2 304, a transmission motor 306 is connected to the left end of the transmission gear 1 302, a transmission belt 2 307 is connected to the left side of the crushing roller 1 301 and the crushing roller 2 303, a transmission box 308 is installed on the right side wall of the crushing box 1, and the transmission belt 2 307 is arranged in the transmission box 308; a guide plate 309 is installed on the right side of the bottom end of the crushing box 1, a filter plate 310 is arranged at the bottom end of the right side of the inside of the crushing box 1, and a feed port 311 is arranged in the middle position of the top of the crushing box 1.

[0032] See also Figure 2 - Figure 3 , Figure 6In this embodiment, the grinding assembly includes a grinding box 401, which is arranged on the right side of the crushing box 1, and the grinding box 401 is arranged at the discharge end of the guide plate 309, a grinding barrel 402 is installed in the middle position inside the grinding box 401, and a rotating rod 403 is arranged in the middle position inside the grinding barrel 402; a grinding knife 404 is symmetrically installed on the outer side of the rotating rod 403 relative to the center, a mounting frame 405 is arranged at the top of the grinding box 401, a feed hopper 406 is installed at the discharge end of the guide plate 309, and the feed hopper 406 is arranged at the top of the mounting frame 405, a water tank 407 is installed at the front end of the crushing box 1, and a water inlet pipe 408 is connected between the water tank 407 and the crushing box 1.

[0033] Example 1

[0034] 55% silicon dioxide, 12% aluminum oxide, 3% sodium oxide, 0.5% potassium oxide, 1% magnesium oxide, 0.1% zinc oxide, 0.5% zirconium dioxide, 0.1% boron trioxide, 1% sodium sulfate, and 0.1% carbon powder are poured into the crushing box 1 through the feed port 311, and the transmission motor 306 drives the transmission gear 1 302 and the crushing roller 1 301 to rotate. At the same time, the friction between the transmission belt 1 305 and the transmission gear 1 302 drives the transmission belt 1 305 to move, and the transmission belt 1 305 transfers this movement to the crushing box 1. The material is then transmitted to the transmission gear 2 304, so that the transmission gear 2 304 rotates and drives the crushing roller 2 303 to rotate. The crushing roller 1 301 and the crushing roller 2 303 rotate simultaneously under the cooperation of the transmission belt 2 307 and the driven wheel to crush the above materials. The crushed mixed material slides into the grinding barrel 402 through the guide plate 309 under the action of gravity. The rotating rod 403 rotates and drives the grinding knife 404 to stir and mix the materials again. After grinding, the mixed raw materials are removed by magnetic separation. After the treatment, the mixed raw materials are poured into a platinum-rhodium alloy crucible and heated to a temperature of 1500°C for 70 minutes. In the middle and late stages of melting, a clarifier is added to the glass liquid, which decomposes at high temperatures to produce gas, promotes the discharge of bubbles, and makes the glass liquid clearer and more transparent. The platinum rod is used for slow stirring, and the temperature is then heated to 1680°C for insulation for 120 minutes. The molten glass liquid overflows from the overflow trough of the furnace, flows downward along the two side walls under the action of gravity, and merges at the bottom to form a glass The glass strip is slowly poured into a cast iron mold for forming, and after forming, it is placed in an annealing furnace at an annealing temperature of 700°C for 2 hours; after cooling to room temperature, a layer of anti-fingerprint coating with low surface energy is deposited on the glass surface; after deposition, a layer of anti-scratch coating with high hardness is prepared on the glass surface again by chemical vapor deposition or sol-gel method; after strengthening, the foldable cover glass is cut by a high-power ultraviolet laser, and after cutting, the cut glass edges are ground and polished with diamond abrasives and cerium oxide polishing liquid.

[0035] Example 2

[0036] 20% silicon dioxide, 15% sodium oxide, 5% potassium oxide, 5% magnesium oxide, 3% zinc oxide, 4% zirconium dioxide, 6% diboron trioxide, 3% sodium sulfate, and 0.8% carbon powder are poured into the crushing box 1 through the feed port 311, and the transmission motor 306 drives the transmission gear 1 302 and the crushing roller 1 301 to rotate. At the same time, the friction between the transmission belt 1 305 and the transmission gear 1 302 drives the transmission belt 1 305 to move, and the transmission belt 1 305 transmits this movement to the transmission gear 2 304. The transmission gear 2 304 is rotated to drive the crushing roller 2 303 to rotate. The crushing roller 1 301 and the crushing roller 2 303 are rotated at the same time under the cooperation of the transmission belt 2 307 and the driven wheel to crush the above materials. The crushed mixed materials slide into the grinding barrel 402 through the guide plate 309 under the action of gravity. The rotating rod 403 rotates to drive the grinding knife 404 to stir and mix the materials again. After grinding, the mixed raw materials are treated with magnetic separation to remove iron. The treatment is completed. The mixed raw materials are then poured into a platinum-rhodium alloy crucible, heated and melted to a temperature of 1500°C for 70 minutes. In the middle and late stages of melting, a clarifier is added to the glass liquid, which decomposes at high temperature to produce gas, promotes the discharge of bubbles, and makes the glass liquid clearer and more transparent. It is slowly stirred with the help of a platinum rod, and then the temperature is heated to 1680°C for insulation for 120 minutes. The molten glass liquid overflows from the overflow trough of the furnace, flows downward along the two side walls under the action of gravity, and converges at the bottom to form a glass ribbon, which is slowly poured into a cast iron mold for molding. After molding, it is placed in an annealing furnace at an annealing temperature of 700°C for 2 hours. After cooling to room temperature, a layer of anti-fingerprint coating with low surface energy is deposited on the glass surface. After deposition, a layer of anti-scratch coating with high hardness is prepared on the glass surface again by chemical vapor deposition or sol-gel method. After strengthening, the foldable cover glass is cut by a high-power ultraviolet laser. After cutting, the cut glass edge is ground and polished with diamond abrasive and cerium oxide polishing liquid.

[0037] The processing and preparation process of a foldable cover plate using Examples 1 and 2 can enable the prepared glass to have a higher strain point, low density, lower thermal expansion coefficient, larger Young's modulus, high tensile strength, and high flexibility index through the synergistic effect of the components of the glass composition.

[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A processing and preparation process for a foldable cover glass, comprising the following steps: S1: Prepare the following materials in mass percentage: 55% to 65% silicon dioxide, 12% to 20% aluminum oxide, 3% to 15% sodium oxide, 0.5% to 5% potassium oxide, 1% to 5% magnesium oxide, 0.1% to 3% zinc oxide, 0.5% to 4% zirconium dioxide, 0.1% to 6% boron trioxide, 1% to 3% sodium sulfate, and 0.1% to 0.8% carbon powder; S2: putting the above materials into a crushing device to fully mix and grind, and after grinding, removing iron from the mixed raw materials by magnetic separation. After the treatment, pouring the mixed raw materials into a platinum-rhodium alloy crucible and heating and melting; S3: In the middle and late stages of melting, a clarifier is added to the glass liquid, which decomposes at high temperatures to produce gas, promotes the discharge of bubbles, and makes the glass liquid clearer and more transparent. The glass liquid is slowly stirred with the help of a platinum rod. S4: The molten glass overflows from the overflow trough of the melting furnace, flows downward along the two side walls under the action of gravity, converges at the bottom to form a glass ribbon, and is slowly poured into the cast iron mold for molding, and then placed in the annealing furnace; S5: After cooling to room temperature, routine thinning, strengthening, processing, quality inspection and packaging are carried out.

2. The processing and preparation process of the foldable cover glass according to claim 1, characterized in that: The melting temperature is 1500°C, the melting time is 70 minutes, the post-heating temperature is 1680°C, and the holding time is 120 to 150 minutes.

3. The processing and preparation process of the foldable cover glass according to claim 1, characterized in that: The annealing temperature is 700-750°C, and the annealing time is 2-2.5h.

4. The processing and preparation process of the foldable cover glass according to claim 1, characterized in that: Strengthen the deposition of an anti-fingerprint coating with low surface energy on the glass surface; After deposition, a scratch-resistant coating with high hardness is prepared on the glass surface again by chemical vapor deposition or sol-gel method.

5. The processing and preparation process of the foldable cover glass according to claim 1, characterized in that: The specific processing steps are to use a high-power ultraviolet laser to cut the foldable cover glass, and after cutting, use diamond abrasives and cerium oxide polishing liquid to grind and polish the edges of the cut glass.

6. The process for preparing the foldable cover glass according to claim 1, characterized in that: The crushing device comprises a crushing box (1), a crushing assembly is arranged inside the crushing box (1), a grinding assembly is arranged at the lower right side of the crushing box (1), support rods (2) are arranged at the four corners of the bottom end of the crushing box (1), the crushing assembly comprises a crushing roller (301), the crushing roller (301) is relatively installed inside the crushing box (1), the input end of the rear end crushing roller (301) is connected to a transmission gear (302), a crushing roller (303) is installed inside the crushing box (1), and the crushing roller (303) is installed below the crushing roller (301).

7. The process for preparing the foldable cover glass according to claim 6, characterized in that: A transmission gear 2 (304) is installed at the input end of the rear end crushing roller 2 (303), a transmission belt 1 (305) is connected between the transmission gear 1 (302) and the transmission gear 2 (304), a transmission motor (306) is connected to the left end of the transmission gear 1 (302), a transmission belt 2 (307) is connected between the left sides of the crushing roller 1 (301) and the crushing roller 2 (303), a transmission box (308) is installed on the right side wall of the crushing box (1), and the transmission belt 2 (307) is arranged in the transmission box (308).

8. The process for preparing the foldable cover glass according to claim 6, characterized in that: A guide plate (309) is installed on the right side of the bottom end of the crushing box (1), a filter plate (310) is arranged at the bottom end of the right side inside the crushing box (1), and a feed port (311) is arranged at the middle position of the top end of the crushing box (1).

9. The process for preparing the foldable cover glass according to claim 6, characterized in that: The grinding assembly comprises a grinding box (401), the grinding box (401) is arranged on the right side of the crushing box (1), and the grinding box (401) is arranged at the discharge end of the guide plate (309), a grinding barrel (402) is installed in the middle position inside the grinding box (401), and a rotating rod (403) is arranged in the middle position inside the grinding barrel (402).

10. The process for preparing the foldable cover glass according to claim 9, characterized in that: A grinding knife (404) is symmetrically mounted on the outer side of the rotating rod (403) relative to the center; a mounting frame (405) is arranged at the top of the grinding box (401); a feed hopper (406) is mounted at the discharge end of the guide plate (309), and the feed hopper (406) is arranged at the top of the mounting frame (405); a water tank (407) is mounted at the front end of the crushing box (1); and a water inlet pipe (408) is connected between the water tank (407) and the crushing box (1).

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