阅读说明：本技术 一种盖板玻璃的制备方法 (Preparation method of cover plate glass ) 是由 袁振兴 黄林 梁金良 庞晓 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种盖板玻璃的制备方法,包括步骤：S1、丝印保护油墨：在盖板玻璃原料的两面均丝印一层抗酸保护油墨；S2、开料；S3、CNC加工；S4、蚀刻：采用蚀刻设备和温度为38～42℃的蚀刻液对CNC加工成型之后的盖板玻璃原材进行时间为4～7min的蚀刻处理；S5、褪保护油墨：将蚀刻之后的盖板玻璃原材置于碱性溶液中进行褪保护油墨处理；S6、清洗：对褪保护油墨之后的盖板玻璃原材进行全自动超声波清洗；S7、钢化：对经过清洗之后的盖板玻璃原材进行钢化处理；S8、丝印：采用丝印机对钢化之后的盖板玻璃原材进行丝印处理；S9、镀膜：对上述盖板玻璃原材进行镀膜处理,完成盖板玻璃加工。本发明适用于结构越来越复杂、性能要求越来越高的多摄盖板玻璃。(The invention discloses a preparation method of cover plate glass, which comprises the following steps: s1, screen printing protective ink: silk-printing a layer of acid-resistant protective printing ink on both sides of the cover plate glass raw material; s2, cutting; s3, CNC machining; s4, etching: etching the cover plate glass raw material which is machined and molded by CNC for 4-7 min by using etching equipment and an etching solution with the temperature of 38-42 ℃; s5, fading protection ink: placing the etched cover plate glass raw material in an alkaline solution for de-protecting ink treatment; s6, cleaning: carrying out full-automatic ultrasonic cleaning on the cover plate glass raw material after the protective ink is removed; s7, tempering: tempering the cleaned cover plate glass raw material; s8, silk screen printing: carrying out silk-screen printing treatment on the toughened cover plate glass raw material by using a silk-screen printing machine; s9, coating: and carrying out film coating treatment on the cover plate glass raw material to finish the cover plate glass processing. The invention is suitable for the cover plate glass with more and more complex structure and higher performance requirement.)

1. The preparation method of the cover plate glass is characterized by comprising the following steps:

s1, screen printing protective ink: silk-printing a layer of acid-resistant protective ink on both sides of the cover plate glass raw material, and curing the acid-resistant protective ink;

s2, cutting: cutting the cover plate glass raw material with acid-resistant protective ink silk-screened on both sides by a cutting machine to be cut into a plurality of cover plate glass raw materials to be processed with preset sizes;

s3, CNC machining: placing a cover plate glass raw material to be processed on a CNC machine tool for CNC processing and forming;

s4, etching: etching the cover plate glass raw material which is machined and molded by CNC for 4-7 min by using etching equipment and an etching solution with the temperature of 38-42 ℃, and cleaning the etched cover plate glass raw material;

s5, fading protection ink: placing the etched cover plate glass raw material in an alkaline solution for de-protecting ink treatment;

s6, cleaning: carrying out full-automatic ultrasonic cleaning on the cover plate glass raw material after the protective ink is removed;

s7, tempering: tempering the cleaned cover plate glass raw material;

s8, silk screen printing: carrying out silk-screen printing treatment on the toughened cover plate glass raw material by using a silk-screen printing machine;

s9, coating: and carrying out film coating treatment on the cover plate glass raw material to finish the cover plate glass processing.

2. The method for manufacturing a cover glass according to claim 1, wherein the etching apparatus in step S4 comprises a hot water tank, an etching bath, a holding basket, a servo motor and a heater, the etching bath and the heater are fixed in the hot water tank, one end of the servo motor is connected to the holding basket, and the servo motor can drive the holding basket to move in the etching bath.

3. The method for producing a cover glass according to claim 2, wherein the step S4 specifically includes:

s41, respectively containing clean water and etching solution in the hot water tank and the etching tank, wherein the clean water surface in the hot water tank is lower than the top surface of the etching tank;

s42, heating the clean water in the hot water tank through the heater to enable the temperature of the etching solution in the etching tank to reach 38-42 ℃;

s43, placing the cover plate glass raw material which is processed and molded by CNC into the containing basket, and immersing the containing basket into the etching solution of the etching tank through the servo motor;

s44, starting the servo motor, and driving the containing basket to rotate at a constant speed for 4-7 min in the etching solution of the etching tank at a rotating speed of 500r/min through the servo motor;

and S45, taking the containing basket away from the etching tank through the servo motor, and cleaning the etched cover plate glass raw material.

4. The method for producing a cover glass according to claim 1, wherein the step S1 specifically includes:

s11, screen-printing a layer of acid-resistant protective ink with the thickness of 14-16 um on one surface of the cover plate glass raw material by using a screen printing machine, and performing surface drying on the acid-resistant protective ink by using a tunnel furnace;

s12, silk-screen printing a layer of acid-resistant protective ink with the thickness of 14-16 um on the other side of the cover plate glass raw material by using a silk-screen printing machine, and performing surface drying on the acid-resistant protective ink by using a tunnel furnace;

s13, silk-screen printing a layer of acid-resistant protective printing ink with the thickness of 14-16 um on both sides of the cover plate glass raw material;

and S14, curing the acid-resistant protective ink on the two sides of the cover glass raw material by using a vertical oven.

5. The method for producing a cover glass according to claim 1, wherein after the step S7, the method further comprises: and soaking the toughened cover plate glass raw material in clear water for 30min, and then cleaning by ultrasonic waves.

6. The method for producing a cover glass according to claim 1, wherein after the step S8, the method further comprises: and coloring the cover plate glass raw material after silk screen printing.

7. The method for producing a cover glass according to claim 6, wherein the step of coloring treatment specifically includes:

s81, NCVM: carrying out color film plating treatment on the cover plate glass raw material after silk screen printing by adopting an NCVM (non-contact vacuum metallization) process;

s82, secondary silk-screen printing: carrying out bottom surface silk-screen printing treatment on the cover plate glass raw material behind the NCVM, and carrying out ink curing;

s83, deplating: soaking the cover plate glass raw material subjected to secondary screen printing in a deplating solution with the concentration of 18-20% and the temperature of 57 +/-2 ℃ for 3min, taking the deplated cover plate glass raw material out of the deplating solution, and washing away the deplating solution on the surface by using clear water;

s84, cleaning: and cleaning by adopting full-automatic ultrasonic waves.

8. The method for producing a cover glass according to claim 7, wherein the step S9 specifically includes:

s91, AR coating: carrying out AR coating film transmission increasing treatment on the cover plate glass raw material;

s92, AF coating: and carrying out AF coating treatment on the cover plate glass raw material after AR coating to finish the cover plate glass processing.

9. The method for producing a cover glass according to claim 1, wherein after step S9, the method further comprises:

s10, warehousing: and (4) detecting the performance and the appearance of the coated cover plate glass, and packaging and warehousing qualified products.

Technical Field

The invention relates to the technical field of glass manufacturing processes, in particular to a method for preparing cover plate glass.

Background

After many years of development, the mobile phone has gradually changed into the attention and pursuit of the mobile phone photographing capability from the initial practical pursuit of the mobile phone performance. In the course of increasing the demand for the photographing capability of mobile phones, the number of cameras of mobile phones is increasing, especially in current middle and high-end mobile phones.

Meanwhile, cover glass with multiple cameras is continuously developed for being matched with a mobile phone with multiple cameras. At present, the structure of the cover glass with multiple cameras is more and more complex, and the performance requirement is more and more high, however, the existing cover glass preparation process is not suitable any more.

Disclosure of Invention

In view of the above situation, the present invention provides a method for manufacturing cover glass, which is suitable for cover glass with more and more complex structure and higher performance requirement.

A method for preparing cover glass comprises the following steps:

s1, screen printing protective ink: silk-printing a layer of acid-resistant protective ink on both sides of the cover plate glass raw material, and curing the acid-resistant protective ink;

s2, cutting: cutting the cover plate glass raw material with acid-resistant protective ink silk-screened on both sides by a cutting machine to be cut into a plurality of cover plate glass raw materials to be processed with preset sizes;

s3, CNC machining: placing a cover plate glass raw material to be processed on a CNC machine tool for CNC processing and forming;

s4, etching: etching the cover plate glass raw material which is machined and molded by CNC for 4-7 min by using etching equipment and an etching solution with the temperature of 38-42 ℃, and cleaning the etched cover plate glass raw material;

s5, fading protection ink: placing the etched cover plate glass raw material in an alkaline solution for de-protecting ink treatment;

s6, cleaning: carrying out full-automatic ultrasonic cleaning on the cover plate glass raw material after the protective ink is removed;

s7, tempering: tempering the cleaned cover plate glass raw material;

s8, silk screen printing: carrying out silk-screen printing treatment on the toughened cover plate glass raw material by using a silk-screen printing machine;

s9, coating: and carrying out film coating treatment on the cover plate glass raw material to finish the cover plate glass processing.

The etching equipment in the step S4 comprises a hot water tank, an etching tank, a containing basket, a servo motor and a heater, wherein the etching tank and the heater are fixedly arranged in the hot water tank, one end of the servo motor is connected with the containing basket, and the servo motor can drive the containing basket to be arranged in the etching tank to move.

Wherein, the step S4 specifically includes:

s41, respectively containing clean water and etching solution in the hot water tank and the etching tank, wherein the clean water surface in the hot water tank is lower than the top surface of the etching tank;

s42, heating the clean water in the hot water tank through the heater to enable the temperature of the etching solution in the etching tank to reach 38-42 ℃;

s43, placing the cover plate glass raw material which is processed and molded by CNC into the containing basket, and immersing the containing basket into the etching solution of the etching tank through the servo motor;

s44, starting the servo motor, and driving the containing basket to rotate at a constant speed for 4-7 min in the etching solution of the etching tank at a rotating speed of 500r/min through the servo motor;

and S45, taking the containing basket away from the etching tank through the servo motor, and cleaning the etched cover plate glass raw material.

Wherein, the step S1 specifically includes:

s11, screen-printing a layer of acid-resistant protective ink with the thickness of 14-16 um on one surface of the cover plate glass raw material by using a screen printing machine, and performing surface drying on the acid-resistant protective ink by using a tunnel furnace;

s12, silk-screen printing a layer of acid-resistant protective ink with the thickness of 14-16 um on the other side of the cover plate glass raw material by using a silk-screen printing machine, and performing surface drying on the acid-resistant protective ink by using a tunnel furnace;

s13, silk-screen printing a layer of acid-resistant protective printing ink with the thickness of 14-16 um on both sides of the cover plate glass raw material;

and S14, curing the acid-resistant protective ink on the two sides of the cover glass raw material by using a vertical oven.

Wherein after the step S7, the method further comprises: and soaking the toughened cover plate glass raw material in clear water for 30min, and then cleaning by ultrasonic waves.

Wherein after the step S8, the method further comprises: and coloring the cover plate glass raw material after silk screen printing.

Wherein the coloring treatment specifically comprises the following steps:

s81, NCVM: carrying out color film plating treatment on the cover plate glass raw material after silk screen printing by adopting an NCVM (non-contact vacuum metallization) process;

s82, secondary silk-screen printing: carrying out bottom surface silk-screen printing treatment on the cover plate glass raw material behind the NCVM, and carrying out ink curing;

s83, deplating: soaking the cover plate glass raw material subjected to secondary screen printing in a deplating solution with the concentration of 18-20% and the temperature of 57 +/-2 ℃ for 3min, taking the deplated cover plate glass raw material out of the deplating solution, and washing away the deplating solution on the surface by using clear water;

s84, cleaning: and cleaning by adopting full-automatic ultrasonic waves.

Wherein, the step S9 specifically includes:

s91, AR coating: carrying out AR coating film transmission increasing treatment on the cover plate glass raw material;

s92, AF coating: and carrying out AF coating treatment on the cover plate glass raw material after AR coating to finish the cover plate glass processing.

Wherein, after step S9, the method further comprises:

s10, warehousing: and (4) detecting the performance and the appearance of the coated cover plate glass, and packaging and warehousing qualified products.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts the chemical polishing principle and carries out a series of process treatments such as etching and the like on the cover plate glass raw material, thereby not only effectively improving the phenomenon of bad sand edge of the camera cover plate glass product and obtaining the performance of freely falling balls from 30cm of a 9g steel ball at a through hole with the diameter of 1.0mm without breaking, but also improving the transmittance of visible light, and being more suitable for multi-camera cover plate glass with more and more complex structure and higher performance requirement.

Drawings

Fig. 1 is a flowchart of a method for manufacturing a cover glass according to an embodiment of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, an embodiment of the present invention provides a method for manufacturing cover glass, which specifically includes steps S1 to S10:

s1, screen printing protective ink: and (3) silk-screening a layer of acid-resistant protective printing ink on both sides of the cover plate glass raw material, and curing the acid-resistant protective printing ink to ensure that etching liquid cannot permeate the surface of the product to cause poor etching.

Specifically, the step of printing the protective ink by silk screen printing comprises the following steps:

s11, screen-printing a layer of acid-resistant protective ink with the thickness of 14-16 um on one surface of a cover plate glass raw material by using a screen printing machine provided with a 200-mesh screen printing plate, and performing surface drying on the acid-resistant protective ink by using a tunnel furnace, wherein the temperature of the tunnel furnace is 170 +/-5 ℃, and the surface drying time is 6-8 min;

s12, screen-printing a layer of acid-resistant protective ink with the thickness of 14-16 um on the other surface of the cover plate glass raw material by using a screen printing machine provided with a 200-mesh screen printing plate, and performing surface drying on the acid-resistant protective ink by using a tunnel furnace, wherein the temperature of the tunnel furnace is 170 +/-5 ℃, and the surface drying time is 6-8 min;

s13, silk-screen printing a layer of acid-resistant protective printing ink with the thickness of 14-16 um on both sides of the cover plate glass raw material by using a silk-screen printing machine provided with a 200-mesh screen plate;

and S14, curing the acid-resistant protective ink on the two sides of the cover plate glass raw material by adopting a vertical oven, wherein the oven temperature is 70 +/-5 ℃, and the surface drying time is 50 +/-5 min.

S2, cutting: and cutting the cover plate glass raw material with acid-resistant protective ink silk-screened on both sides by using a cutting machine so as to cut the cover plate glass raw material into a plurality of cover plate glass raw materials to be processed with preset sizes.

S3, CNC machining: and placing the cover plate glass raw material to be processed on a CNC machine tool for CNC processing and forming.

Wherein, step S3 specifically includes:

s31, swinging: sequentially placing a plurality of cover plate glass raw materials to be processed in a tray placing jig;

s32, feeding: fixing a balance plate jig cleaned by an air gun on a CNC machine tool through vacuum adsorption;

s33, CNC machining: starting the CNC machine tool, and automatically carrying out CNC machining forming on the edges and the through holes of the cover plate glass raw materials in sequence;

s34, blanking: and (5) closing the vacuum source, taking down the balance tool and the cover plate glass raw material, and finishing the CNC machining.

S4, etching: etching the cover plate glass raw material after CNC machining by using etching equipment and etching liquid, and cleaning the etched cover plate glass raw material.

By the etching process, slight small sand edges generated at the edges of the cover plate glass raw material after CNC machining forming can be dissolved at the edges which are not protected by the printing ink on the cover plate glass raw material through the etching liquid, so that the passivation and smoothing effect is achieved, the phenomenon of the slight small sand edges is effectively improved, the product yield and performance can be improved, and the product appearance can be beautified.

Specifically, the etching equipment comprises a hot water tank, an etching tank, a containing basket, a servo motor and a heater. The etching bath and the heater are fixedly arranged in the hot water bath, one end of the servo motor is connected with the containing basket through a hook, and the servo motor can drive the containing basket to be arranged in the etching bath for movement.

Meanwhile, the etching step specifically comprises the following steps:

s41, respectively containing clean water and etching solution in the hot water tank and the etching tank, wherein the clean water surface in the hot water tank is lower than the top surface of the etching tank;

s42, heating the clean water in the hot water tank through the heater to enable the temperature of the etching solution in the etching tank to reach 38-42 ℃;

s43, placing the cover plate glass raw material which is processed and molded by CNC into the containing basket, and immersing the containing basket into the etching solution of the etching tank through the servo motor;

s44, starting the servo motor, and driving the containing basket to rotate at a constant speed for 4-7 min in the etching solution of the etching tank at a rotating speed of 500r/min through the servo motor;

and S45, taking the containing basket away from the etching tank through the servo motor, and cleaning the etched cover plate glass raw material with clean water.

S5, fading protection ink: and (4) placing the etched cover plate glass raw material in an alkaline solution for de-protecting ink treatment.

Specifically, the step of fading the protective ink comprises the following steps:

s51, placing the etched cover plate glass raw material in a cleaning frame, and soaking the cover plate glass raw material in a sodium hydroxide solution with the concentration of 3% -4% and the temperature of 75 +/-3 ℃ for 2-3 min.

S52, taking the cover plate glass raw material out of the sodium hydroxide solution, and washing away the sodium hydroxide solution on the surface by using clear water;

s53, soaking the cover plate glass raw material in a citric acid solution for 2 min;

s54, taking the cover plate glass raw material out of the citric acid solution, and washing away the citric acid solution on the surface by using clean water;

and S55, cleaning the cover plate glass raw material by using a single-groove ultrasonic cleaning tank for 1-2 min.

S6, cleaning: and carrying out full-automatic ultrasonic cleaning on the cover plate glass raw material after the protective ink is removed.

Specifically, the full-automatic ultrasonic cleaning process comprises the following steps: loading → first water tank → second water tank → third water tank → spray tank → first pure water tank → second pure water tank → third pure water tank → fourth pure water tank → slow-pull tank → first drying tank → second drying tank → third drying tank → unloading. Wherein, the concentration of the liquid medicine is 2 percent to 3 percent, the temperature of the liquid medicine tank is 50 +/-5 ℃, the general vibrator is 0.6 +/-0.1A, the cleaning time is 120s, the drying temperature is 120 +/-20 ℃, and the drying time is 150 +/-30 s.

S7, tempering: and tempering the cleaned cover plate glass raw material to ensure that the cover plate glass raw material has the performance of freely falling and breaking 9g of steel balls from 30cm at a through hole with the diameter of 1.0 mm.

Specifically, the tempered cover plate glass raw material is soaked in clear water for 30min to soak potassium nitrate on the surface of the cover plate glass raw material, and then is cleaned by ultrasonic waves.

S8, silk screen printing: and (4) carrying out silk-screen printing treatment on the toughened cover plate glass raw material by adopting a silk-screen printing machine.

Specifically, after the step S8, the method further includes:

coloring: and coloring the cover plate glass raw material after silk screen printing.

Specifically, the coloring step includes the steps of:

s81, NCVM: carrying out color film plating treatment on the cover plate glass raw material after silk screen printing by adopting an NCVM (non-contact vacuum metallization) process;

s82, secondary silk-screen printing: carrying out bottom surface silk-screen printing treatment on the cover plate glass raw material behind the NCVM, and baking and curing printing ink;

s83, deplating: placing the cover plate glass raw material subjected to secondary screen printing in a cleaning frame, soaking the cover plate glass raw material in a deplating solution with the concentration of 18-20% and the temperature of 57 +/-2 ℃ for 3min, taking the deplated cover plate glass raw material out of the deplating solution, and washing the deplating solution on the surface by using clear water.

S84, cleaning: the full-automatic ultrasonic cleaning process comprises the following steps: loading → drug solution tank → second drug solution tank → third drug solution tank → spray tank → first purified water tank → second purified water tank → third purified water tank → fourth purified water tank → slow-pulling tank → first drying tank → second drying tank → third drying tank → unloading. Wherein, the concentration of the liquid medicine is 4 percent to 8 percent, the temperature of the liquid medicine tank is 60 +/-3 ℃, the general vibrator is 1.0 +/-0.1A, the cleaning time is 160s, the drying temperature is 140 +/-20 ℃, and the drying time is 160 +/-30 s.

S9, coating: and carrying out film coating treatment on the cover plate glass raw material to finish the cover plate glass processing.

Specifically, the coating step comprises the following steps:

s91, AR coating: carrying out AR coating film transmission increasing treatment on the cover plate glass raw material;

s92, AF coating: and carrying out AF coating treatment on the cover plate glass raw material after AR coating to finish the cover plate glass processing.

S10, warehousing: and (4) detecting the performance and the appearance of the coated cover plate glass, and packaging qualified products and warehousing.

According to the preparation method of the cover plate glass provided by the embodiment, a chemical polishing principle is adopted, and a series of process treatments such as etching and the like are carried out on a cover plate glass raw material, so that the phenomenon of bad sand edges of a camera cover plate glass product can be effectively improved, the performance that a 9g steel ball freely falls from a position of 30cm and is not broken at a through hole with the diameter of 1.0mm can be obtained, the transmittance of visible light can be improved, and the method is more suitable for multi-shot cover plate glass with more and more complex structure and higher performance requirement.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.