KR20120033566A - Tempered glass manufacture method - Google Patents

Abstract

The present invention relates to a method for processing tempered glass, and more particularly, by laminating and laminating disc glass, and simultaneously performing a roughing process including hole processing and round processing together with cell unit cutting at the time of cell cutting. And it relates to a tempered glass processing method capable of shortening the process time by removing the roughing process.
The present invention can be applied not only to glass substrates used as display panels, but also to glass processing for all displays, including display window processing used in portable electronic devices such as mobile phones, PDPs, PMPs, and electronic dictionaries.

Description

Tempered Glass Manufacturing Method {Tempered Glass Manufacture Method}

The present invention relates to a method for processing tempered glass, and more particularly, by laminating and laminating disc glass, and simultaneously performing a roughing process including hole processing and round processing together with cell unit cutting at the time of cell cutting. And it relates to a tempered glass processing method capable of shortening the process time by removing the roughing process.

The present invention can be applied not only to glass substrates used as display panels, but also to glass processing for all displays, including display window processing used in portable electronic devices such as mobile phones, PDPs, PMPs, and electronic dictionaries.

As portable electronic devices become lighter and thinner, the display panel becomes thinner and thinner, and synthetic resin materials such as acrylic or PMMA, which are generally used as display panels, are vulnerable to heat and scratches, and have a lower transmittance than glass, resulting in low luminance. Thus, a glass display panel is used.

However, in general glass, since the strength is weak, there is a limit in slimming the thickness, so display panels and windows using tempered glass are widely used.

In the conventional tempered glass processing process, a glass sheet is cut into a cell unit glass suitable for a display panel or window size, and then a sheet machining process is completed through chemical strengthening after surface machining. In this case, every cut cell unit glass is used. Since it is necessary to carry out the surface machining, it takes a lot of manpower and time, not only the productivity is very low, but also the process cost increases.

In order to solve the above problems, a lamination processing process is performed in which a glass disc is laminated using a bonding material, and the laminated glass disc is cut into a block shape in which cell unit glass is laminated to perform surface machining.

However, the conventional bonding process has a problem that scratches and stains are generated on the glass surface in the process of laminating and bonding the glass original plate.

In addition, conventionally, when cutting the laminated glass disc by cell unit, it is impossible to curve the hole, round, etc., so that the laminated glass disc is cut into the cell unit, and then hole processing and roughing are separately performed on the cell unit glass laminated by the cell unit. Since the finishing process must be performed after the machining, there is a problem that the productivity of the glass is lowered due to the increase in the machining process.

As an object of the present invention is to solve the problems described above, the object of the present invention can significantly reduce the process time by simultaneously performing the rough processing, including hole processing, round processing when cutting the cell unit in the state that the original glass is bonded The present invention provides a method for processing tempered glass.

In addition, by providing a protective coating on both sides of the original glass glass before the cell unit glass cutting to provide a tempered glass processing method that can prevent the occurrence of scratches and stains of the original glass when the cell unit glass laminated bonding.

In order to achieve the above object, the tempered glass processing method according to the present invention comprises laminating the plate glass using a bonding agent to form a disc glass block and cutting and roughing the disc glass block to unit cell glass blocks. Forming and post-processing by separating the cut and rough-processed cell unit glass sheet.

And forming a protective coating layer on both sides of the original glass before the forming of the original glass block and removing the protective coating layer after the surface machining step.

In the forming of the cell unit glass block, cutting of the disc glass by any one method selected from waterjet, scribing (wheel, cutting edge, diamond wheel), laser, etching, sand blast, and ultrasonic dicing. And roughing processing including hole processing and round processing at the same time.

In addition, the post-processing may include a step of finishing the cell unit glass blocks separated from each other and a washing step including hot air drying or high temperature pure drying (HOT DI Water).

In addition, the protective coating layer is formed by printing and drying on both sides of the glass master plate using a silk printing machine carrying a protective ink.

And the protective ink is characterized in that the compound containing epoxy resin or epoxy resin.

Removing the protective coating layer is characterized in that for removing the protective coating layer by ultrasonic cleaning.

Here, the ultrasonic cleaning is characterized in that to remove the protective coating layer by dipping in a solution of sodium hydroxide (NaOH) or potassium hydroxide (KOH) 3 ~ 10% in water or pure water by ultrasonication at a temperature of 70 ~ 90 degrees.

As described above, the tempered glass processing method according to the present invention cuts the process time by drastically shortening the process time by simultaneously cutting the laminated laminated glass into cell unit glass and simultaneously performing roughing processing including hole processing and round processing. And an excellent effect that can improve yield.

In addition, by protective coating the both sides of the original glass before the cell unit glass cutting to prevent scratches and stains of the original glass when the cell unit glass laminated bonding to produce an excellent effect to minimize the defective rate of the product to improve the yield.

1 is a process diagram schematically showing a tempered glass processing method according to a preferred embodiment of the present invention.
2 is a flowchart of FIG. 1.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

1 is a process diagram schematically showing a tempered glass processing method according to a preferred embodiment of the present invention, Figure 2 is a flow chart of FIG.

Referring to FIGS. 1 and 2, first, the disc glass is laminated by using the bonding agent 30 as in FIG. 1A to form the disc glass block 40.

The binder 30 may be any material having adhesiveness and adhesion to temporarily bond the cell unit glass, and more specifically, natural bonding such as rosin, starch, starch, protein, polysaccharide, and latex. Or synthetic binders such as epoxy, melamine, urea, phenol, silicone and the like.

The bonding agent 30 does not permanently bond the cell unit glass, but because it temporarily bonds, the adhesive force does not need to be too high, and only the adhesive force that can be separated by a small force does not fall off the cell unit glass. Since it is necessary, it is preferable to use natural binders, such as rosin, rather than a synthetic binder.

The binder 30 may be coated between the disc glasses in a liquid state, and then hardened or cooled to make the binder solid and at the same time, the disc glasses may be bonded. Through this, the disc glass block 40 is formed by laminating and bonding the disc glass vertically.

Subsequently, as shown in FIG. 1B, the disc glass block 40 is cut to form a cell unit glass block 50.

More specifically, the disc glass needs to cut the cell unit glass according to the size of the display panel or window, and for this purpose, waterjet, scribing (wheel, cutting edge, diamond wheel), laser, etching, sandblast, ultrasonic die It can be cut into a cell unit glass block using a method such as singh.

Here, the waterjet method has a merit of cutting straight or curved lines in a manner of cutting or processing an object by spraying a fluid of a predetermined pressure through a micro nozzle of a micro unit through a high pressure pump.

Therefore, in order to perform roughing processing including hole processing and round processing (chamfering process) at the time of cutting of the cell unit glass block, it is possible to simultaneously perform the outer shape cutting, which is straight processing, and the roughing processing, which is curved processing, easily by adjusting water pressure. It is desirable to use a waterjet system that can.

The disc glass refers to disc glass in which at least one cell unit glass is partitioned, and the cell unit glass refers to unit glass cut to a size according to a display window specification of a display panel or a portable electronic device.

When the cut and rough processed cell unit glass block 50 is formed as described above, the cell unit glass block is separated and washed as shown in FIG. 1C and then finished. (S130)

Here, the sheet separation of the cell unit glass block 50 may be performed by manual or mechanical operation, and the bonding agent 30 between the cell unit glass has a bonding force enough to be separated by an artificial force. Therefore, it can be easily separated and removed. However, when the cell unit glass block 50 is separated by the artificial force, since the binder component may remain in the separated glass, a process of removing the remaining binder component may be added.

To this end, the binder component may be removed by ultrasonic cleaning with a detergent of acetone or alcohol, an alkali component (HP 7 or more).

In addition, since the binder 30 is bonded to the cell unit glass in a solid state by curing, the binder 30 may be melted in a liquid state by heat to remove the binder from the glass surface through cleaning. In this case, when the binder is melted in a liquid state by heat, the binder may affect the glass itself. Therefore, the binder should be prepared to melt at a temperature lower than the melting temperature of the glass.

In this case, when the cutting and roughing resulted in the side as smooth as the requirements of the glass, the finishing may be omitted.

When the finishing process is completed as described above, the glass cell unit glass is heat treated or chemically strengthened to generate the glass cell unit, and finally, through the cleaning and inspection to process the cell glass unit (S140).

More specifically, the heat treatment strengthening is a method of heating the original glass 500 ~ 600 degrees close to the softening temperature, and quenched by compressed cooling air to compress and deform the glass surface portion and to tensilely deform the glass inside.

In addition, chemical strengthening is performed by putting glass in a cell unit into a reinforcing solution (potassium nitrate, pigment, etc.) and immersing it at a temperature of 400 to 500 degrees to strengthen the glass.Sodium ions and potassium ions in the reinforcing solution undergo ion exchange. Sodium ions, which are generated and distributed on the glass surface, are released and potassium enters the place, thereby increasing the density of the glass surface and causing compressive deformation on the glass surface.

When the tempered process for the glass is finished as described above, the final cell unit tempered glass is processed through washing and inspection.

In this case, the cleaning process may be a hot air drying method, but in the case of hot air drying, since the surface is dried in a state where water remains through a reinforcing process, many stains may occur on the surface. It is preferable to use the water method (high temperature pure drying method).

The HOT DI-Water method may be dried by removing the water remaining on the surface due to the difference in the surface tension between the water remaining on the surface and the high-temperature pure water to prevent staining on the surface.

After the drying of the HOT DI-Water as described above, the cleaning process may be finished by IR drying.

On the other hand, the present invention may further comprise the step (S100) of forming a protective coating layer on the original glass in order to prevent the occurrence of scratches or stains on the glass surface before the original glass bonding.

In general, the glass is easily scratched through the lamination bonding process of the original glass, there is a problem that a defect occurs on the surface of the glass by the bonding agent between the original glass to cause a defect of the product.

Thus, a protective coating layer may be formed on both sides of the original glass to prevent and remove scratches or staining defects generated from subsequent processes.

More specifically, the protective coating layer formed on both sides of the disc glass is hot-air drying after printing the both sides of the disc glass using an automatic or semi-automatic silk printing machine carrying a protective ink (for example, 10 to 100 to 150 degrees drying temperature) 40 minutes drying) or by using an IR dryer.

Here, the protective ink may be composed of an epoxy resin or a compound containing an epoxy resin, and a curing agent, a pigment, an additive, and a solvent may be mixed with the epoxy resin. For example, a protective ink may be prepared by blending an epoxy resin and a curing agent in an amount of 8: 1 to 15: 1.

In addition, conventional coating materials may be used in which a protective layer is formed on the surface of the original glass to protect the original glass.

And the protective ink is printed on both sides of the disc glass through the silk printing machine (for example, printing plate NBC mesh 100Mash, 45 or 22.5 degrees angle) is preferably printed in a thickness of 8 ~ 12um range, the hot air drying is The range of 140-160 degree is preferable.

When the protective coating layer is formed on both sides of the original glass as described above, the protective coating layer is removed after the finishing (S140). (S131)

Here, the protective coating layer is removed by diluting a 3-10% aqueous solution of sodium hydroxide (NaOH) or potassium hydroxide (KOH) in water or pure water and soaking for 5-15 minutes with ultrasonic waves at a temperature of 70-90 degrees (preferably 80 degrees). It can then be removed by washing with water or pure water.

When the protective coating layer is removed as described above, the adhesive remaining on the protective coating layer can be removed at the same time. Therefore, no separate treatment is required for removing the adhesive remaining on the glass after separation by artificial force when separating the sheet from the cell unit glass block. It is possible to prevent the occurrence of scratches or stains generated from the process.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

10 disc glass 20 protective coating layer
30 bonding agent 40 cell unit glass block

Claims (8)

In the tempered glass processing method,
Laminating and bonding the original glass using a bonding agent to form an original glass block;
Cutting and roughing the disc glass block to form a cell unit glass block;
Tempering glass processing method comprising the step of separating the cut and rough-processed cell unit glass by a single sheet.
The method of claim 1,
Before forming the disc glass block
Forming a protective coating layer on both sides of the disc glass;
Tempering glass processing method further comprising the step of removing the protective coating layer after the step of machining.
The method of claim 1,
Forming the cell unit glass block
Roughing, including cutting and hole cutting and round processing of the disc glass, is carried out by any one selected from water jet, scribing (wheel, cutting edge, diamond wheel), laser, etching, sand blast and ultrasonic dicing. Tempered glass processing method characterized in that performed at the same time.
The method of claim 1,
The post-processing step
Finishing the glass blocks separated by cell units;
Tempered glass processing method comprising a cleaning step comprising hot air drying or hot high temperature drying (HOT DI Water).
The method of claim 2,
The protective coating layer
Tempered glass processing method characterized in that it is formed by printing and drying on both sides of the glass disc using a silk printing machine carrying a protective ink.
6. The method of claim 5,
The protective ink is
Tempered glass processing method characterized in that the epoxy resin or a compound containing epoxy resin.
The method of claim 2,
Removing the protective coating layer
Tempering glass processing method characterized in that for removing the protective coating layer by ultrasonic cleaning.
The method of claim 7, wherein
The ultrasonic cleaning is
Diluted solution of sodium hydroxide (NaOH) or potassium hydroxide (KOH) 3 to 10% in water or pure water to be immersed in ultrasonic at 70 ~ 90 degrees temperature to remove the protective coating layer.

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