CN111212165A - Method for manufacturing lithium-aluminum-silicon glass cover plate - Google Patents
Method for manufacturing lithium-aluminum-silicon glass cover plate Download PDFInfo
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- CN111212165A CN111212165A CN202010123059.5A CN202010123059A CN111212165A CN 111212165 A CN111212165 A CN 111212165A CN 202010123059 A CN202010123059 A CN 202010123059A CN 111212165 A CN111212165 A CN 111212165A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Surface Treatment Of Glass (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
A method for manufacturing a lithium aluminum silicon glass cover plate comprises the steps of cutting a large piece of lithium aluminum silicon glass into a specification which is 0.30-0.50mm larger than the size of a finished product; carrying out fine carving in the next procedure, and carrying out four-corner cutting, rough cutting and fine trimming by a grinding head according to the provided drawing requirements (including size and chamfered edge); the product is subjected to the processes of sweeping and flat grinding, microcracks on the surface of the product are eliminated, edge breakage of the product is reduced, and the quality and the cleanliness of the surface of the product are improved; the product is subjected to secondary strengthening treatment in the next procedure, so that the performances of friction resistance, drop resistance and the like of the product are improved; performing silk-screen printing on the product, uniformly printing ink on the surface of the product in a silk-screen printing mode, and baking the ink to enable the ink to be cured on the surface of the product; and then, AF (fingerprint-resistant liquid) is sprayed on the surface of the product, so that fingerprint and dirt resisting effects of the surface of the product are improved. The above procedures can realize the advantages of stable processing performance, high yield, high customer satisfaction and the like on the lithium aluminum silicon glass cover plate.
Description
Technical Field
The invention belongs to the field of display glass manufacturing processes, and particularly relates to a method for manufacturing a lithium aluminum silicon glass cover plate.
Background
The lithium aluminum silicon cover plate is used as an important component of touch display devices of mobile phones, flat panels and notebook computers. The main function of the LED display screen is to protect display screen (LCD, LED) devices from being damaged by the outside. Generally, as a glass cover plate of a display device such as a mobile phone, a flat panel and the like, 0.55-0.80mm ultrathin glass is adopted, has the advantages of good light transmission, ultrathin property, scratch resistance, impact resistance and the like, and is widely popular with mobile phone terminals and consumers.
The protective layer of the traditional display device is generally made of an acrylic material, has poor scratch resistance and impact resistance, cannot meet the test standard of mobile phone manufacturers, and has poor consumer reliability.
Disclosure of Invention
In view of the technical problems in the background art, the present invention provides a method for manufacturing a lithium aluminum silicate glass cover plate,
in order to solve the technical problems, the invention adopts the following technical scheme to realize:
the manufacturing method of the lithium aluminum silicon glass cover plate is characterized by comprising the following steps:
s1: cutting a raw material; cutting the whole lithium aluminum silicon glass plate into a plurality of glass sheets;
s2: cleaning; cleaning the glass sheet to remove surface impurities;
s3: fine carving; trimming the glass sheet into a shape required by a corresponding product according to a product drawing;
s4: polishing; polishing the glass sheet in the step S3 to obtain a semi-finished product of the glass cover plate;
s5: strengthening; soaking the semi-finished glass cover plate in a mixed liquid of potassium nitrate and sodium nitrate, wherein the temperature of the mixed liquid is controlled to be 390-415 ℃, and the soaking time is 4-6 h;
s6: testing the strengthening performance; performing strength test on the glass cover plate semi-finished product strengthened in the step S5, and screening out the glass cover plate semi-finished product with qualified strength;
s7: silk-screen printing; screen printing is carried out on the semi-finished product of the glass cover plate with qualified strength, and baking treatment is carried out after printing is finished;
s8: cleaning; and cleaning the product obtained in the step S7 to obtain a finished glass cover plate product.
In a preferred embodiment, when the monolithic lithium aluminosilicate glass plate is cut in step S1, the cutting pressure of the cutting equipment is controlled to be 450 to 550kgf/cm2Kerosene is sprayed on the cutting surfaces of the cutter and the glass plate.
Preferably, in step S2, the glass sheet is cleaned by a three-tank ultrasonic cleaning machine.
In a preferred embodiment, in step S4, the polishing machine is used to polish and polish the upper and lower surfaces of the glass sheet simultaneously, so as to repair scratches and outer edge cracks on the surface of the glass sheet.
In a preferred scheme, during polishing, for 2D products, both the upper polishing disc and the lower polishing disc adopt polishing skins generated by polyurethane foaming; for 2.5D products, the upper grinding disc adopts a pig hair brush or a carpet, and the lower grinding disc adopts a polishing skin generated by polyurethane foaming.
In a preferred embodiment, in step S4, the strengthening is divided into two strengthening steps; during primary strengthening, the temperature of the mixed liquid of potassium nitrate and sodium nitrate is controlled to be 395-410 ℃, and the strengthening time is 4-6 hours; during the primary strengthening, the temperature of the mixed liquid of potassium nitrate and sodium nitrate is controlled to be between 395 and 410 ℃, and the strengthening time is 2 to 4 hours.
In a preferred embodiment, in step S7, the mesh number of the screen printing plate in the screen printing is 140T or 165T.
In a preferred embodiment, the product obtained in step S7 is sprayed with an anti-fingerprint liquid.
In a preferable scheme, the glass sheet after the finishing engraving in the step S3 is cleaned by a thirteen-groove cleaning machine, and the glass sheet qualified in cleaning is processed in the step S4;
cleaning the polished semi-finished glass cover plate in the step S4 by using a thirteen-groove cleaning machine, and performing step S5 treatment on the cleaned qualified glass sheet;
cleaning the strengthened product in the step S5 by a thirteen-tank cleaning machine, and processing the qualified glass sheet in the step S6;
cleaning the product subjected to silk-screen printing in the step S7 by using a thirteen-groove cleaning machine, and spraying qualified glass sheets by using anti-fingerprint liquid;
and obtaining a finished product of the glass cover plate after the spraying is finished.
This patent can reach following beneficial effect:
the invention can well realize the processing technology of the lithium aluminum silicon glass; according to the manufacturing method of the invention, the performance CS of the lithium aluminum silicon glass after being strengthened can reach 850Mpa, Dol can reach 130 mu m, and Dol-Tail can reach 6 mu m; the 4PB performance can reach 800 MPa; the falling ball performance can reach 0.40J; the warping property can reach the effect of less than 0.25 mm; the pencil hardness test on the surface of the product can reach 9H; the processed product has good scratch resistance and drop resistance.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
A preferred embodiment is shown in fig. 1, a method for manufacturing a lithium aluminosilicate glass cover plate, comprising the steps of:
s1: cutting a raw material; cutting the whole lithium aluminum silicon glass plate into a plurality of glass sheets; the size of each glass sheet is 0.30-0.50mm larger than the size (length and width) of a finished product, and the specific operation is as follows:
when the whole lithium aluminum silicon glass plate is cut, the lower cutter pressure of cutting equipment is controlled to be 450-550 kgf/cm2Kerosene is sprayed on the cutting surfaces of the cutter and the glass plate. The parameters of the cutting machine include air pressure value, lower cutter pressure, initial pressure and normal pressure. The air pressure value is 5-6kgf/cm2The knife-setting pressure is 450-550 kgf/cm2The initial pressure is 480 to 600kgf/cm2Normal pressure value of 550 to 650kgf/cm2。
The comparison table of the cutting tool size and the main parameters of the cutting machine is as follows (the actual parameters need to be correspondingly finely adjusted according to specific conditions):
s2: cleaning; cleaning the glass sheet to remove surface impurities; the method specifically comprises the following steps: and cleaning the glass sheet by using a three-groove ultrasonic cleaning machine. The three-tank cleaning can clean off kerosene, glass debris and other impurities on the surface of the glass sheet. The frequency of the ultrasonic wave is generally 40 KHZ; the cleaning liquid is a mixture of pure water and an alkaline cleaning agent.
S3: fine carving; trimming the glass sheet into a shape required by a corresponding product according to a product drawing; namely, four corners are cut, rough cutting and fine trimming are carried out on a grinding head according to the requirements (including size and chamfered edge) of a provided drawing;
the precision engraving (named as Computerized Numerical Control for short, CNC) is a machine for controlling the machining of a cutter by using a computer, and a program file designed by mastercam v9.1 is input into the precision engraving machine, so that the machining can be accurately performed according to the requirements of a drawing. The auxiliary materials used are grinding head, cutting fluid, acrylic plate, etc. Before CNC machining, the problem of size expansion of a product after post-process tempering needs to be considered. The expansion size for lithium aluminosilicate glasses is typically eight ten-thousandths of a day. The sizes of the cover glass generally mainly controlled are length, width, chamfer angle and hole to long edge or short edge size. The hole site size typically varies less regardless of the hole site expansion size.
In particular, see the following table:
the grinding head processing parameters are as follows:
and cleaning the glass sheet after the fine engraving by using a thirteen-groove cleaning machine, and carrying out next treatment on the glass sheet which is qualified after cleaning.
S4: polishing; polishing the glass sheet in the step S3 to obtain a semi-finished product of the glass cover plate, eliminating micro-cracks on the surface of the product and reducing the edge breakage of the product; and (3) polishing the upper surface and the lower surface of the glass sheet by using a polishing machine, and repairing scratches and outer side broken edges on the surface of the glass sheet, so that the surface quality and cleanliness of the product are improved. During polishing, for 2D products, polishing skins generated by polyurethane foaming are adopted by the upper polishing disc and the lower polishing disc; for 2.5D products, the upper grinding disc adopts a pig brush or a carpet, and the lower grinding disc adopts a polishing skin generated by polyurethane foaming, so that the 2.5D arc surface is smooth and mellow. Wherein, 2.5D represents a cambered surface screen, also known as a water drop screen, which is widely used in mobile phones. The 2.5D screen can make the appearance of the surface of the mobile phone like full and non-overflowing water drops, and has more visual tension.
The polishing parameters are generally as follows:
| concentration of polishing powder | Stress of polishing | Polishing time | Rotational speed |
| 1.07-1.15g/ml | 180-250Kg | 8-16min | 25±5rpm |
And cleaning the polished semi-finished glass cover plate by using a thirteen-groove cleaning machine, and carrying out next treatment on the qualified glass sheet.
S5: strengthening; soaking the semi-finished glass cover plate in a mixed liquid of potassium nitrate and sodium nitrate, wherein the temperature of the mixed liquid is controlled to be 390-415 ℃, and the soaking time is 4-6 h; the performances of friction resistance, drop resistance and the like of the product are improved.
Preferably, the strengthening is divided into two strengthening; during primary strengthening, the temperature of the mixed liquid of potassium nitrate and sodium nitrate is controlled to be 395-410 ℃, and the strengthening time is 4-6 hours; during the primary strengthening, the temperature of the mixed liquid of potassium nitrate and sodium nitrate is controlled to be between 395 and 410 ℃, and the strengthening time is 2 to 4 hours. The specific parameters are shown in the following table:
and cleaning the strengthened product by a thirteen-groove cleaning machine, and carrying out next treatment on the qualified glass sheet after cleaning.
S6: testing the strengthening performance; performing strength test on the glass cover plate semi-finished product strengthened in the step S5, and screening out the glass cover plate semi-finished product with qualified strength;
the chemically strengthened product generally needs to be tested for stress, warpage, ball drop, 4PB, etc.
And (3) stress testing: selecting photoelastic coefficient, refractive index, thickness parameter and the like of the lithium-aluminum-silicon glass, and testing on a stress instrument. The stress test instrument for the lithium-aluminum-silicon glass is a stress instrument (instrument spectrum is 518nm-640nm) of lsp1000-2000 and a FSM6000LeUV (instrument spectrum is 365nm) stress test instrument;
ball falling: the falling ball test needs to be carried out according to specific terminal requirements, and generally adopts 130g/30cm parameters to carry out the test;
4 PB: four-point bending test parameters: the upper span is 20 mm/the lower span is 40mm, the descending speed is 10mm/min, until the product is crushed, the 4PB value during crushing is recorded;
warping: on the marble platform, the distance from the waist or four corners of the product to the marble platform is tested, and is generally less than 0.25 mm.
S7: silk-screen printing; screen printing is carried out on the semi-finished product of the glass cover plate with qualified strength, and baking treatment is carried out after printing is finished; after the ink is baked, the ink is solidified on the surface of the product;
generally, the screen mesh number is adopted: printing is performed on the 140T and 165T screens. Baking is required after printing is completed.
Generally, for the first process of silk-screen printing, the screen plate adopts 165T, and the other processes adopt 140T. The ink type, curing agent type, oil-water-opening type and proportion of each process need to be adjusted according to different parameters of the actually used ink.
Cleaning the silk-screen printed product by a thirteen-groove cleaning machine, and spraying qualified glass sheets by fingerprint-resistant liquid (AF); the anti-fouling capability of the product surface is improved. The performance test requirements for AF spraying are as follows:
and (5) obtaining a finished product of the glass cover plate after spraying treatment.
Claims (9)
1. The manufacturing method of the lithium aluminum silicon glass cover plate is characterized by comprising the following steps:
s1: cutting a raw material; cutting the whole lithium aluminum silicon glass plate into a plurality of glass sheets;
s2: cleaning; cleaning the glass sheet to remove surface impurities;
s3: fine carving; trimming the glass sheet into a shape required by a corresponding product according to a product drawing;
s4: polishing; polishing the glass sheet in the step S3 to obtain a semi-finished product of the glass cover plate;
s5: strengthening; soaking the semi-finished glass cover plate in a mixed liquid of potassium nitrate and sodium nitrate, wherein the temperature of the mixed liquid is controlled to be 390-415 ℃, and the soaking time is 4-6 h;
s6: testing the strengthening performance; performing strength test on the glass cover plate semi-finished product strengthened in the step S5, and screening out the glass cover plate semi-finished product with qualified strength;
s7: silk-screen printing; screen printing is carried out on the semi-finished product of the glass cover plate with qualified strength, and baking treatment is carried out after printing is finished;
s8: cleaning; and cleaning the product obtained in the step S7 to obtain a finished glass cover plate product.
2. The method for manufacturing a lithium aluminosilicate glass cover plate according to claim 1, wherein: in step S1, when cutting the whole lithium aluminum silicon glass plate, the cutting pressure of the cutting equipment is controlled to be 450-550 kgf/cm2Kerosene is sprayed on the cutting surfaces of the cutter and the glass plate.
3. The method for manufacturing a lithium aluminosilicate glass cover plate according to claim 1, wherein: in step S2, the glass sheet is cleaned using a three-tank ultrasonic cleaning machine.
4. The method for manufacturing a lithium aluminosilicate glass cover plate according to claim 1, wherein: in step S4, the upper and lower surfaces of the glass sheet are simultaneously ground and polished by a polishing machine, and the glass sheet is subjected to a repair process including scratches and outer edge chipping on the surface of the glass sheet.
5. The method of manufacturing a lithium aluminosilicate glass cover plate according to claim 4, wherein: during polishing, for 2D products, polishing skins generated by polyurethane foaming are adopted by the upper polishing disc and the lower polishing disc; for 2.5D products, the upper grinding disc adopts a pig hair brush or a carpet, and the lower grinding disc adopts a polishing skin generated by polyurethane foaming.
6. The method for manufacturing a lithium aluminosilicate glass cover plate according to claim 1, wherein: in step S4, the strengthening is divided into two strengthening; during primary strengthening, the temperature of the mixed liquid of potassium nitrate and sodium nitrate is controlled to be 395-410 ℃, and the strengthening time is 4-6 h; during primary strengthening, the temperature of the mixed liquid of potassium nitrate and sodium nitrate is controlled to be 395-410 ℃, and the strengthening time is 2-4 h.
7. The method for manufacturing a lithium aluminosilicate glass cover plate according to claim 1, wherein: in step S7, the mesh number of screens in screen printing is 140T or 165T.
8. The method for manufacturing a lithium aluminosilicate glass cover plate according to claim 7, wherein: and (4) spraying the product obtained in the step (S7) by using anti-fingerprint liquid.
9. The method for manufacturing a lithium aluminosilicate glass cover plate according to any one of claims 1 to 8, wherein: cleaning the glass sheet after the finish carving in the step S3 by using a thirteen-groove cleaning machine, and processing the qualified glass sheet in the step S4;
cleaning the polished semi-finished glass cover plate in the step S4 by using a thirteen-groove cleaning machine, and performing step S5 treatment on the cleaned qualified glass sheet;
cleaning the strengthened product in the step S5 by a thirteen-tank cleaning machine, and processing the qualified glass sheet in the step S6;
cleaning the product subjected to silk-screen printing in the step S7 by using a thirteen-groove cleaning machine, and spraying qualified glass sheets by using anti-fingerprint liquid;
and obtaining a finished product of the glass cover plate after the spraying is finished.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995261A (en) * | 2020-08-12 | 2020-11-27 | 咸宁南玻光电玻璃有限公司 | Method for manufacturing ultrathin glass substrate |
| CN113548793A (en) * | 2021-08-13 | 2021-10-26 | 上海光和光学制造大丰有限公司 | Manufacturing method of vehicle-mounted glass |
| CN113716881A (en) * | 2021-09-04 | 2021-11-30 | 冉康乐 | Production process of toughened glass lens |
| CN113880413A (en) * | 2021-09-27 | 2022-01-04 | 彩虹集团（邵阳）特种玻璃有限公司 | Cover plate glass and processing method for improving 4PB value of cover plate glass |
| CN115167091A (en) * | 2022-08-05 | 2022-10-11 | 东莞华清光学科技有限公司 | Simple watch glass positioning and fixing method |
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| CN109574514A (en) * | 2018-12-03 | 2019-04-05 | 仙游县元生智汇科技有限公司 | A kind of manufacture craft of 3D glass cover-plate |
| CN110194599A (en) * | 2019-06-20 | 2019-09-03 | 东莞市瑞立达玻璃盖板科技股份有限公司 | A kind of chemical strengthening method for reducing glass warp, promoting glass shock resistance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100253485A1 (en) * | 2009-04-03 | 2010-10-07 | Dong Sun Park | Touch screen device |
| CN106630680A (en) * | 2016-12-29 | 2017-05-10 | 四川旭虹光电科技有限公司 | High-aluminum-silicon cover glass and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995261A (en) * | 2020-08-12 | 2020-11-27 | 咸宁南玻光电玻璃有限公司 | Method for manufacturing ultrathin glass substrate |
| CN113548793A (en) * | 2021-08-13 | 2021-10-26 | 上海光和光学制造大丰有限公司 | Manufacturing method of vehicle-mounted glass |
| CN113716881A (en) * | 2021-09-04 | 2021-11-30 | 冉康乐 | Production process of toughened glass lens |
| CN113880413A (en) * | 2021-09-27 | 2022-01-04 | 彩虹集团（邵阳）特种玻璃有限公司 | Cover plate glass and processing method for improving 4PB value of cover plate glass |
| CN115167091A (en) * | 2022-08-05 | 2022-10-11 | 东莞华清光学科技有限公司 | Simple watch glass positioning and fixing method |
| CN115167091B (en) * | 2022-08-05 | 2023-11-24 | 东莞华清光学科技有限公司 | Simple watch glass positioning and fixing method |
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Application publication date: 20200529 |