CN111283481B

CN111283481B - Glass polishing process

Info

Publication number: CN111283481B
Application number: CN202010208172.3A
Authority: CN
Inventors: 张建; 鲁雪娇
Original assignee: Lens Technology Dongguan Co ltd
Current assignee: Lens Technology Dongguan Co ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2021-08-20
Anticipated expiration: 2040-03-23
Also published as: CN111283481A

Abstract

The application discloses glass polishing process, including the following step: 1) polishing the concave surface and the convex surface of the glass for the first time, wherein the glass generates a plurality of dark scratches in the polishing process; 2) frosting the glass; 3) chemically polishing the glass; 4) and a vacuum suction turnover machine for polishing the leather brush is adopted to polish the concave surface of the glass for the second time so as to reduce the number of the dark scratches. According to the glass polishing process, the vacuum suction turnover machine provided with the polishing leather brush is used for polishing glass for the second time, so that the glass is prevented from generating different colors, the dark scratch quantity of the glass can be reduced, the reject ratio of glass products is reduced, and manpower, material resources and cost are saved.

Description

Glass polishing process

Technical Field

The invention relates to the technical field of polishing, in particular to a polishing process.

Background

With the development of 5G mobile phone reform, the glass industry is more competitive, and the requirements on the quality and the appearance of glass are more strict. In the production process of glass, when the glass with the dark scratch is polished by a 15B grinder, the glass is easy to generate the dark scratch due to material characteristics, when the glass with the dark scratch is subjected to a subsequent frosting process (the principle of the frosting process is that a silicon oxide layer and HF salts are subjected to chemical reaction, and the surface is subjected to corrosion reaction, so that the surface structure of the glass is in an uneven state, and light is refracted and scattered), the dark scratch of the glass is amplified by an HF polishing process in the frosting process, so that the concave scratch of the glass is up to 30%, and if the glass is subjected to re-polishing after frosting, the sand surface is also easy to polish and fall off, so that the glass with the dark scratch is different in color, namely the glass with the dark scratch cannot be repaired, so that the product has high reject ratio, and manpower, material resources and cost are wasted.

Disclosure of Invention

In view of the above, the present invention provides a glass polishing process, which can reduce the reject ratio of glass products and save manpower, material resources and cost.

In order to achieve the purpose, the invention provides the following technical scheme:

a glass polishing process comprises the following steps:

1) polishing the concave surface and the convex surface of the glass for the first time, wherein the glass generates a plurality of dark scratches in the polishing process;

2) frosting the glass;

3) chemically polishing the glass;

4) and a vacuum suction turnover machine for polishing the leather brush is adopted to polish the concave surface of the glass for the second time so as to reduce the number of the dark scratches.

Preferably, in the above glass polishing process, the duration of the second polishing is not less than 15 minutes.

Preferably, in the glass polishing process, the rotating speed of the upper disc brush of the vacuum suction turnover machine is 45 to 55RPM, and the rotating speed of the lower disc brush is 30 to 40 RPM.

Preferably, in the glass polishing process, in step 1), when the first polishing operation is performed, the concave surface is polished by using a nylon wire mixed brush and a polishing leather brush, and the convex surface is polished by using a carpet brush.

Preferably, in the above glass polishing process, a mill is used to perform the first polishing operation on the concave surface, an upper disc brush and a lower disc brush of the mill are both the nylon wire mixed brush and the polished leather brush, the rotation speed of the upper disc brush is 25RPM to 35RPM, and the rotation speed of the lower disc brush is 30RPM to 40 RPM.

Preferably, in the glass polishing process, the convex surface is polished for the first time by using an overturning machine, an upper disc brush and a lower disc brush of the overturning machine are both the carpet brushes, the rotating speed of the upper disc brush is 45-55 RPM, and the rotating speed of the lower disc brush is 30-40 RPM.

Preferably, in the above glass polishing process, between step 1) and step 2), the following steps are further included in sequence:

A) carrying out first inspection on the glass;

B) carrying out silk-screen printing on the glass;

C) and spraying protective oil on the glass.

Preferably, the glass polishing process further comprises the following steps in sequence after the step 4):

D) carrying out secondary inspection on the glass;

E) pressurizing the glass;

F) carrying out a third test on the glass;

G) and (5) bonding the glass.

Compared with the prior polishing process, the glass polishing process provided by the invention has the advantages that a second polishing operation is added after the step of chemical polishing, the second polishing operation adopts a vacuum air suction turnover machine to polish the concave surface of the glass, the vacuum air suction turnover machine adsorbs the convex surface of the glass in a vacuumizing or air suction mode to fix the glass, the rigid contact with the glass is reduced in the way of adsorbing the convex surface, the glass is more firmly fixed, and the sand falling of the convex surface and the generation of heterochrosis are avoided, so that the damage to the convex surface of the glass during the second polishing is avoided, in addition, the brush arranged on the vacuum air suction turnover machine is a polishing leather brush, and the number of dark scratches generated in the first polishing process can be reduced by carrying out secondary polishing on the concave surface of the glass by the polishing leather brush. According to the glass polishing process, the vacuum suction turnover machine provided with the polishing leather brush is used for polishing glass for the second time, so that the glass is prevented from generating different colors, the dark scratch quantity of the glass can be reduced, the reject ratio of glass products is reduced, and manpower, material resources and cost are saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a flow chart of a glass polishing process provided by an embodiment of the present invention;

FIG. 2 is a schematic view of glass with a dark scratch prior to a second polish;

FIG. 3 is a schematic view of a glass with a dark scratch removed after a second polishing.

Detailed Description

The invention provides a glass polishing process which can reduce the reject ratio of glass products and save manpower, material resources and cost.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, the present application provides a glass polishing process, which is suitable for polishing a glass product such as a screen cover plate, and mainly includes the following steps:

1) polishing the concave surface and the convex surface of the glass for the first time, wherein the glass generates a plurality of dark scratches in the polishing process; among them, the glass is preferably AG glass; the specific operation of polishing is to brush and sweep the glass by using a brush; dark scratches are fine scratches that cannot be seen by naked eyes during a first inspection described later, which are made on glass and appear after a chemical polishing process described later to affect the quality of glass, and therefore, a second polishing described later is required to remove the effect of dark scratches on the quality;

2) the glass is frosted to ensure that the glass has a frosting effect, and the frosting operation principle is as follows: the silicon oxide layer and HF salt are subjected to chemical reaction, and the surface of the glass is subjected to erosion reaction to form a pattern required by the process;

3) chemically polishing glass, namely HF chemical polishing, specifically, chemically reacting hydrofluoric acid solution with the glass to enable the surface structure of the glass to be in an uneven state, so as to cause light refraction and scattering;

4) the vacuum air suction turnover machine provided with the polishing leather brush is adopted to carry out secondary polishing on the concave surface of the glass so as to reduce the number of dark scratches, wherein, the vacuum air suction turnover machine (namely JR turnover machine) is a turnover machine which fixes the glass by vacuum air suction and is specially used for polishing the glass, the structure of the glass polishing machine is that the structure for fixing glass in the prior common turnover machine (the turnover machine is also a device specially used for polishing glass) is replaced by the prior vacuum-pumping adsorption structure, namely, the vacuum air suction turnover machine realizes the fixation of the glass by absorbing the convex surface of the glass in a vacuum air suction mode, the convex surface is not dropped with sand to generate different colors, meanwhile, the brush arranged on the vacuum air suction turnover machine is a polishing leather brush, and the brush is used for brushing glass, so that the quantity of dark scratches of the glass can be reduced.

In this embodiment, it is preferable that the duration of the second polishing is not less than 15 minutes. This range of values is selected to maximize the removal of dark scratches from the glass, as shown in fig. 1 and 2, and is therefore the preferred length of time for this embodiment.

Preferably, in order to further improve the effect of removing the dark scratches, an upper disc brush of the vacuum suction turnover machine (the vacuum suction turnover machine comprises an upper disc brush and a lower disc brush which sequentially brush and sweep glass) is set to be 45-55 RPM, and more preferably 50 RPM; the rotating speed of the lower disc brush is 30-40 RPM, and more preferably 35 RPM. And the polishing pressure is preferably 600KG, and the electrifying current of the large disk and the small disk of the vacuum suction turnover machine for installing the polishing leather hairbrush is 16A and 3.7A respectively.

Further preferably, in step 1), when the first polishing operation is performed, the concave surface of the glass is polished by using a nylon wire mixed brush and a polishing leather brush, and the convex surface of the glass is polished by using a carpet brush. So adopt the mixed brush of nylon silk to add the polishing leather brush and brush the concave surface and sweep and realize the polishing, because its surface removal volume that can the at utmost increase glass, and so adopt the pure polishing leather brush to brush the concave surface, because it can make glass roughness become dense, let the dark scratch of the glass after follow-up chemical polishing hinder and become slight to better promotion is to the effect of getting rid of dark scratch. Preferably, the brushing time of the carpet brush for brushing the convex surface of the glass is 40 minutes; the nylon wire mixed brush and the polishing leather brush sequentially brush the glass, and the brushing time of the nylon wire mixed brush and the polishing leather brush on the glass is 900S. The nylon wire mixed brush is a brush with bristles mixed with a nylon wire material, the polishing leather brush is a brush with bristles made of polishing leather, and the two kinds of brushes have better polishing effect on the convex surface of the glass compared with brushes made of other materials; carpet brushes, in contrast to nylon filament mixed brushes and buff brushes, are macroscopically cloth-like (i.e., similar to a carpet intended to be laid on a floor) and microscopically cloth-like having a plurality of protruding nap on the surface (i.e., microscopically similar to a brush) through which the glass is brushed.

In this embodiment, a mill (the mill is also an existing device specially used for polishing glass, and the difference between the mill and the turnover machine is that only one surface of the glass can be polished, the mill in this embodiment is preferably a 15B mill) is preferably used for performing a first polishing operation on the concave surface, an upper disc brush and a lower disc brush of the mill are both a nylon wire mixed brush and a polished leather brush, and the rotation speed of the upper disc brush is 25RPM to 35RPM, more preferably 30 RPM; the rotating speed of the lower disc brush is 30-40 RPM, and more preferably 35 RPM. Meanwhile, the time length of the first polishing of the concave surface by the mill is preferably 70 minutes, and the milling concentration is 1.15-1.30 g/ml. That is, the brush on the mill also includes two parts-a brush installed on the upper plate (upper plate brush) and a brush installed on the lower plate (lower plate brush), and the brushes installed on each of the two parts include a nylon wire mixing brush and a polishing leather brush, so the polishing effect on the concave surface can be improved.

Performing primary polishing operation on the convex surface by using a turnover machine (the turnover machine can be the vacuum suction turnover machine or the existing common turnover machine), wherein an upper disc brush and a lower disc brush of the turnover machine are carpet brushes, and the rotating speed of the upper disc brush is 45-55 RPM, and more preferably 50 RPM; the rotating speed of the lower disc brush is 30-40 RPM, and more preferably 35 RPM. Meanwhile, the time length of the first polishing of the convex surface by the turnover machine is preferably 40 minutes, and the grinding concentration is 1.15-1.30 g/ml.

Specifically, the glass polishing process provided by this embodiment further includes the following steps in sequence between step 1) and step 2):

A) carrying out first inspection, namely, flat inspection 1 on the glass, wherein the specific operation mode is that the glass is observed manually by naked eyes so as to judge whether the first polishing effect meets the process requirement or not;

B) carrying out silk-screen printing on the glass, namely printing ink on the glass so as to embody the pattern to be processed through the distribution of the ink on the glass;

C) the glass is sprayed with the protective oil, namely, yellow light operation is carried out, and particularly, the protective oil is sprayed on the concave surface of the glass, so that the protective oil can protect the concave surface of the glass, and the concave surface is prevented from being corroded by chemical solution.

Further, the glass polishing process provided by this embodiment further includes, after step 4), the following steps in sequence:

D) carrying out secondary inspection on the glass, namely, carrying out flat inspection 2, wherein the specific operation mode is that the glass is manually observed by naked eyes so as to judge whether the effects of operations such as frosting, chemical polishing, secondary polishing and the like after the flat inspection 1 meet the process requirements or not;

E) pressurizing the glass, namely processing the glass by adopting chemical modes such as ion exchange and the like so as to increase the hardness of the glass and reduce the probability of the glass breaking due to falling;

F) carrying out third inspection on the glass, namely carrying out white sheet operation, wherein the specific operation mode is that the glass is observed manually by naked eyes so as to judge whether the effect of the operation carried out after the flat inspection 2 meets the process requirement or not;

G) and (4) attaching the glass, namely attaching the explosion-proof membrane to the glass to obtain a finished glass product.

The above glass polishing process is summarized by the inventors through many studies, analyses and experiments, and the following table is part of the data of the experiments. By adopting the glass polishing process, the reject ratio of the glass caused by dark scratches can be reduced from 30% to 20%, and the manpower, material resources and cost for glass production are remarkably reduced.

In the present specification, the structure of each part is described in a progressive manner, each part is described with emphasis on differences from the existing process, and the whole and part of the steps of the polishing process can be obtained by combining the above steps.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The glass polishing process is characterized by comprising the following steps of:

2) frosting the glass;

3) chemically polishing the glass;

2. The glass polishing process according to claim 1, wherein the second polishing is continued for a period of not less than 15 minutes.

3. The glass polishing process according to claim 1, wherein the rotation speed of the upper disc brush of the vacuum suction turnover machine is 45-55 RPM, and the rotation speed of the lower disc brush is 30-40 RPM.

4. The glass polishing process according to claim 1, wherein in step 1), the first polishing operation is performed by polishing the concave surface with a nylon wire mixed brush and a buff leather brush, and polishing the convex surface with a carpet brush.

5. The glass polishing process according to claim 4, wherein the first polishing operation is performed on the concave surface by using a mill, wherein an upper disc brush and a lower disc brush of the mill are both the nylon wire mixing brush and the polishing leather brush, and the upper disc brush rotates at 25 to 35RPM and the lower disc brush rotates at 30 to 40 RPM.

6. The glass polishing process according to claim 4, wherein the convex surface is subjected to the first polishing operation by using an overturning machine, an upper disc brush and a lower disc brush of the overturning machine are both the carpet brushes, the rotating speed of the upper disc brush is 45-55 RPM, and the rotating speed of the lower disc brush is 30-40 RPM.

7. The glass polishing process according to claim 1, characterized by further comprising the following operation steps in sequence between step 1) and step 2):