KR101420263B1

KR101420263B1 - Method Manufacturing Glass

Info

Publication number: KR101420263B1
Application number: KR1020110121892A
Authority: KR
Inventors: 김재환; 공경준; 김하영; 정광택; 강경훈
Original assignee: (주)태양기전
Priority date: 2011-11-21
Filing date: 2011-11-21
Publication date: 2014-07-17
Also published as: KR20130056124A

Abstract

More particularly, the present invention relates to a glass processing method, and more particularly, to a method for cutting a glass plate by cutting a glass plate of a glass plate and then chamfering the glass plates To a method of processing a glass.

Description

Method Manufacturing Glass [0001]

The present invention can be applied not only to a glass substrate used as a display panel, but also to all display glass processing such as display window processing used in portable electronic devices such as mobile phones, PDPs, PMPs, and electronic dictionaries.

As portable electronic devices become thinner and thinner, the thickness of the display panel gradually becomes thinner. Generally, synthetic resin materials such as acrylic or PMMA used in display panels are vulnerable to heat and scratches, and transmittance is lower than that of glass As a result, display panels made of glass are widely used.

Particularly, in the case of ordinary glass, since the strength is weak, there is a limit to making the thickness thin, so display panels and windows using tempered glass are widely used.

In the conventional glass processing process, a glass plate is cut into a cell unit glass suitable for a display panel or a window, and then subjected to a sheet-cutting process, which is completed through chemical strengthening. In this case, Since it requires a lot of manpower and time to perform the processing, the productivity is very low, and the process cost is increased.

In order to solve the above problems, a joining process for laminating a glass plate by using a bonding material and then cutting a laminated glass plate into a glass cell block shape to perform a chamfering process has been developed and used.

However, in the conventional bonding process, defects such as scratches and unevenness may occur on the surface of a glass in the process of laminating and bonding glass plates, and a protective film or a coating layer is formed on the glass plate in order to prevent defects such as scratches and unevenness There is a problem that it is difficult to precisely cut the outer frame portion due to the vertical gradient of the glass due to the thickness difference or the gradient of the protective coating layer.

In addition, since it is difficult to precisely curve processing such as hole processing or round processing at the time of cutting the laminated glass plate into a cell unit, there is a problem that an additional curving processing step is required, thereby increasing the process.

In addition, since the conventional glass plate joining process uses a mechanical processing method such as CNC or water jet injection, cracks are generated on the side surface of the glass cell so that chamfering processing requires two or more operations, There was a problem that the efficiency was poor.

Since the cut glass cell block is difficult to be chamfered in a state where glass cells are stacked, chamfering should be performed for each sheet in a state that the glass cell block stacked and formed is cut out in a unit of glass cell, There is a problem that productivity is lowered.

DISCLOSURE OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a glass substrate, which comprises roughing a disk glass in a glass cell unit (including outer shape or hole processing), laminating the cut glass cells to form a glass cell block The present invention is to provide a glass processing method capable of drastically shortening the process time of glass manufacturing by simultaneously chamfering the glass cell block.

According to an aspect of the present invention, there is provided a method of processing a glass, comprising the steps of cutting a glass plate in a glass cell unit, A step of finishing and chamfering the glass cell block at the same time, and a step of separating and finishing the finished and chamfered glass cell block into glass cells.

The cutting step is characterized in that the raw glass is processed into a glass cell through dry or wet etching, and a curving process of a hole shape or an external shape is simultaneously performed to perform roughing.

The dry etching process is characterized by masking portions other than the cut regions of the original glass and cutting the glass cells in which the hole shape and the external shape of the glass cell are formed by processing the cut region by a sand blasting method.

The dry etching method is characterized in that the portions other than the cut regions of the original glass are masked, the cut regions are first partially etched by being carried on the etchant, and the partially etched cut regions are cut by the second sandblasting method .

The sand blasting method is characterized in that the abrasive is cut by jetting air at an injection pressure of 3 to 10 kgf / cm ² in a range of 200 to 500 meshes.

The wet etching process is characterized in that masking other than the cut region of the original glass is performed, and etching is performed by spraying an etchant on the cut region.

The wet etching process is characterized in masking the portions other than the cut regions of the original glass, partially etching the cut regions by the etching liquid, and etching and cutting the partially etched cut regions by spraying the second etchant .

The forming of the glass cell block may be performed by laminating a plurality of glass cells between the glass cells using a double-sided adhesive film.

In the finishing and chamfering step, the glass cell block is chamfered simultaneously with the outer shape and the hole shape, and since the outer shape of the glass cell is formed in the cutting step, the chamfering process is completed .

In the finishing and chamfering step, the outer shape of the glass cell is formed at the same time as the glass cell block is chamfered at the same time, so that the chamfering with respect to the glass cell block with the glass- Processing is performed.

In the finishing and chamfering step, the glass cell block is chamfered at the same time, and chamfering is simultaneously performed using a glass processing tool having chambers corresponding to the number of layers stacked on the glass cell block.

As described above, the glass processing method according to the present invention cuts the glass cells in a single unit of the original glass by the dry or wet method, particularly the sand blast method, so that the outline and hole shapes of the glass cells are simultaneously rough- So that the machining time can be drastically shortened because chamfering can be performed in less than one time.

Further, by chamfering the stacked glass cell blocks by stacking the cut glass cells, chamfering precision and reliability can be improved, and the process time can be remarkably shortened, resulting in an excellent effect of improving productivity and yield .

FIG. 1 is a process diagram schematically showing a glass processing method according to a preferred embodiment of the present invention.
2 is a flow chart of Fig.
3 schematically shows a glass processing tool according to a preferred embodiment of the present invention.
4 illustrates a rounded chamfer groove according to a preferred embodiment of the present invention.
5 is a cross-sectional view schematically showing a glass processing tool according to a second embodiment of the present invention.
FIG. 6 is a cross-sectional view schematically showing a glass cutting tool for simultaneously performing finishing and chamfering processes according to another embodiment of the present invention.

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

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

Here, although a normal glass can be used for the glass, it is preferable to use a tempered glass for producing a thin plate glass for display. Hereinafter, the term glass will be used in unity without distinguishing between glass and tempered glass.

The glass plate refers to a glass unit in which a plurality of glass cells can be partitioned, and the glass cell is a cell unit glass cut from the glass plate to a size according to a display window specification of a display panel or a portable electronic device.

Referring to FIGS. 1 and 2, first, a glass plate is cut in units of glass cells as shown in FIG. 1A (S110)

More specifically, the disk glass 10 is cut by a dry or wet etching method in units of glass cells 20, and precise curve processing such as hole processing or round processing of a glass cell is simultaneously performed.

A sandblast method may be used as the dry etching method.

The sand blasting method is a method of masking a region excluding a cut region of a glass cell and cutting a cut region other than masking by air jetting sand particles such as silicon and sea sand.

Here, it is preferable that the air jet is used in a range of 200 to 400 mesh (preferably 240 to 400 mesh) at a pressure of 3 to ⁷ kgf / cm ² .

On the other hand, a conventional dry cutting method such as a method in which a gas is used in a plasma state to cause a physical reaction to etch a cut region other than the masking portion, a laser beam cut, or the like can be used.

The wet etching refers to a method of masking a glass cell region other than a cut region of a disc glass, and spraying an etchant to the cut region to etch and cut.

Further, the portions other than the original glass cut regions may be masked, and the cut regions may be first partially etched by being carried on the etchant, and then the etchant may be secondarily sprayed by spraying the etched cut regions.

Here, it is preferable that the spray is spray-etched by spraying a spray applied with acid (hydrofluoric acid, hydrochloric acid, etc.) at a pressure of 3 to 7 Kgf / cm ² .

In addition, the wet cell and the dry cell can be mixed to cut the glass cell from the original glass.

First, the portion other than the cut region of the original glass is masked, the etched liquid is carried to partially etch the cut region, and then the partially etched cut region is cut by sandblasting to cut the glass cell from the original glass.

When the dry etching and the wet etching are used, in particular, a sand blast method is used, a single unit of the glass plate (10) is processed. However, Roughing for curved machining can be performed at the same time.

Therefore, since the outer shape of the glass cell is cut into the "" shape as shown in Fig. 1A, chamfering can be performed in less than one step in the subsequent chamfering step, thereby shortening the processing time.

It is apparent that the process time is shortened when the glass cell block is cut after forming the disc glass block by lamination of the disc glass in the conventional manner. However, it is difficult to form the curve like the contour and the hole shape, Since it is impossible to process the outer shape, side cracks occur largely. Therefore, it is necessary to chamfer at least two times in the chamfering process. Therefore, the process time is increased and the hole process must be separately performed in the state of separating the sheets. The process time is further increased.

When the glass cells are cut as described above, the cut glass cells 20 are laminated to form the glass cell blocks 30. (S130)

The glass cell 20 can be laminated using a double-sided adhesive film 40 which can temporarily fix the glass cells vertically stacked.

Since the glass cell block 30 does not permanently laminate the glass cells 20 but temporarily adheres to the glass cell block 30, the glass cell block 30 needs only an adhesive force enough to be separated without being damaged by a small force. It is preferable to use a film that can be easily detached, such as a process oil film, a hot melt film, or the like.

The double-sided adhesive film 40 also serves to guide precise chamfering and finishing by keeping the vertical gap between the glass cells constant.

Although the double-sided adhesive film 40 is used as a means for laminating the glass cells 20 in the above embodiment, it is also possible to use a natural adhesive such as a rosin, a starch, a protein, a polysaccharide and a latex or a natural adhesive such as epoxy, melamine, urea, phenol, A synthetic adhesive such as silicone may be used.

However, in order to chamfer the stacked glass cell blocks 30 at the same time, it is desirable that the spacing of the stacked glass cells be constant, and therefore it is preferable to use an adhesive film in order to keep the spacing of the glass cells constant.

When the glass cell block 30 is formed as described above, chamfering and finishing processes for performing dimensioning or precision processing on the glass cell block are performed (S140)

The chamfering means finishing the hole and the glass side of the glass in a designed dimension by chamfering. In accordance with the present invention, the roughly processed glass cell has a hole shape and a side surface of " " And thus the crack can be minimized. Therefore, chamfering can be performed with only one chamfering process or less.

FIG. 1C shows how a glass cell block is processed by a tool for performing a chamfering and finishing process. In the dry and wet etching process, the side surface contour of the glass cell is cut in a " It is possible to perform chamfering and finishing with a machining operation of one or less times using a glass cutting tool having a straight blade without chamfer grooves.

Also, chamfering is simultaneously performed on the roughly machined holes by the dry or wet etching during the chamfering.

Meanwhile, as shown in FIG. 1D, chamfering and finishing may be performed using a glass processing tool having multiple chambers.

1F, chamfering and finishing of the inner holes A and B of the roughly processed glass cell block can be performed through the hole machining portion formed at the lower end of the glass machining tool.

3 schematically shows a glass processing tool according to a preferred embodiment of the present invention.

The glass processing tool 60 according to the present invention may be configured as a chamfer tool and may include a chamfering portion 610 and a finishing portion 630. The chamfering portion 610 for processing the glass to be removed And is formed as a multi-stage chamfer groove (611).

More specifically, since the conventional chamfer tool is formed by a single chamfer groove, the chamfering portion is formed by a single chamfer groove, while the glass processing tool 60 according to the present invention is formed by a plurality of chamfer grooves 611, It is possible to simultaneously finely process the number of glass.

That is, the glass processing tool may have a plurality of chambers 611 constituting a chamfered portion according to the number of glasses stacked on the glass block. For example, as shown in FIG. 3B, When stacked, the glass laminated on the glass block can be simultaneously processed by using a chamfer tool having a five-stage chamfer groove.

Referring to FIG. 3, the glass cutting tool finishing the side of the cell-unit glass block through the finishing part 630 and the finishing side of the cell-based glass block through the secondary chamfering part 610 Chamfering processing.

Each of the plurality of chambers 611 formed in the plurality of chambers is configured to contact the glass to be cleaned and to finish the glass.

As shown in FIG. 4, the projections 612 between the respective chamfer grooves are rounded in order to minimize the concentration stress applied to the edges, thereby enhancing the machining performance of each stage.

5 is a cross-sectional view schematically showing a glass processing tool according to a second embodiment of the present invention.

5, a plurality of chambers formed in accordance with the present invention includes a machining portion 621 formed by rounding a surface to be processed while abutting against a glass to be cleaned, and a machining portion And a groove 622.

FIG. 6 is a cross-sectional view schematically showing a glass cutting tool for simultaneously performing finishing and chamfering processes according to another embodiment of the present invention.

Referring to FIG. 6, the glass processing tool according to the present invention is configured to include a finishing portion inside a chamfering portion 640 having a multi-stage structure.

More specifically, the glass cutting tool is chamfered through a chamfered portion 641 formed on the upper and lower surfaces of the chamfered portion 640, and finishing is performed through a finishing portion 642 formed on the inner side.

Therefore, the finishing and chamfering process for the cell-unit glass block to be erased can be performed at the same time.

When chamfering and finishing are completed as described above, the cell-unit glass blocks are cut into a single sheet. (S140)

Here, the sheet separation of the glass cell block 30 can be performed manually or by a mechanical operation, and the double-sided adhesive film 40 between the cell unit glasses has a bonding force enough to be separated by an artificial force It can be easily separated and removed.

On the other hand, when the adhesive component of the double-sided adhesive film 40 such as a process oil film or a hot-melt film is adhered to the cell unit glass in a solid state by curing, it melts in a liquid state by heat using a hot plate, The adhesive film can be separated. Here, when the double-sided adhesive film 40 is melted in a liquid state by heat, the double-sided adhesive film 40 may be influenced on the glass itself. Therefore, the double-sided adhesive film 40 should be controlled to be melted at a temperature lower than the melting temperature of the glass.

The separated glass cell is heat-treated or chemically strengthened to produce a reinforced cell unit glass, and the glass cell is finally processed through cleaning and inspection (S150).

More specifically, the heat treatment strengthening is a method in which the glass cell is heated to 500 to 600 degrees, which is close to the softening temperature, and quenched by the compressed cooling air to compressively deform the glass surface portion and tensile deformation of the glass interior.

The chemical strengthening is a method of strengthening the glass by immersing the cell glass cell in the reinforcing solution (potassium nitrate, pigment, etc.) at a temperature of 400~500 ° C., so that the sodium ion contained in the glass and the potassium ion in the strengthening solution are ion- The sodium ions distributed on the glass surface are escaped and the potassium is introduced into the place, so that the density of the glass surface is increased and the compressive deformation occurs on the glass surface.

After completion of the tempering treatment for the glass, the final cell unit tempered glass is processed through washing and inspection.

Here, the hot-air drying method may be used in the cleaning step. However, since the hot-air drying is performed while the water remains in the surface of the hot-air drying step, the surface may be cleaned with alkali or pure water.

After the cleaning as described above, IR drying is performed, and the processed glass cells are inspected through reliability strength and appearance inspection.

The present invention may further include a step (S100) of forming a protective coating layer on the disc glass to prevent scratches or unevenness on the glass surface before the disc glass bonding.

In general, scratches are likely to occur in the glass through the laminating and bonding process of the disc glass, and there is a problem that defects occur on the product surface due to unevenness on the surface of the glass due to the bonding agent between the disc glass.

Therefore, it is possible to prevent or eliminate the occurrence of scratches or stains caused by the subsequent processes by forming a protective coating layer on the glass cell regions on both sides of the original glass.

More specifically, the protective coating layer formed on both sides of the disk glass can be formed by laminating a protective film or by printing a protective ink.

First, when laminating a protective film, a photosensitive film may be laminated on a disc glass, and a photomask process may be performed to etch a cut region other than the glass cell.

In addition, a glass cell region on both sides of the original glass is ink-printed using an automatic or semiautomatic silk printing press on which protection ink is carried, followed by hot air drying (for example, drying at 100 to 150 degrees C for 10 to 40 minutes) As shown in FIG.

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

In addition, a conventional coating material may be used that protects the disc glass by forming a protective layer on the disc glass surface.

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

If the protective coating layer is formed on both sides of the disk glass as described above, the protective coating layer is removed after finishing (S140). (S141)

Herein, the protective coating layer is removed by diluting an aqueous solution of 3 to 10% of sodium hydroxide (NaOH) or potassium hydroxide (KOH) with water or pure water, and immersing it in ultrasonic wave for 5 to 15 minutes at a temperature of 70 to 90 degrees After that, it can be removed by water or pure water.

When the protecting coating layer is removed as described above, the remaining bonding agent on the protective coating layer can be removed at the same time. Therefore, separate processing for removing the bonding agent remaining in the glass after separation by artificial force is not necessary when separating from the cell unit glass block , It is possible to prevent the generation of scratches or stains from the process in advance.

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: Glass cell
30: Glass cell block 40: Double-sided adhesive film

Claims

In the glass working method,
Comprising the steps of simultaneously performing a roughing process including a hole shape and an outer shape by dry etching or wet etching to rough-cut the original glass in a glass cell unit;
In the step of cutting the disk glass in units of glass cells, the hole and the side are cut in the shape of ">" shape by a dry or wet etching process, not a mechanical process, Forming a glass cell block by laminating the glass cells;
The glass cell block is chamfered simultaneously with the outer shape and the hole shape, and the outer shape of the glass cell is ">" Simultaneously finishing and chamfering the glass cell block capable of completing the chamfering process;
And separating the finished and chamfered glass cell blocks into glass cells and separating them into glass sheets.

delete

The method according to claim 1,
The dry etching process
Masking the portion other than the cut region of the original glass and cutting the cut region by a sand blasting method to cut the glass cell in which the hole shape and the external shape of the glass cell are formed.

The method of claim 3,
The dry or wet etch process
Characterized in that a portion other than the cut region of the original glass is masked, the cut region is first partially etched by being carried on the etchant, and the partially etched cut region is cut by a sandblasting method using a mixture of dry and wet processes. Glass processing method.

The method according to claim 3 or 4,
The sand blasting method
Wherein the abrasive is cut by jetting air at a spraying pressure of 3 to 10 kgf / cm ² in a range of 200 to 500 meshes.

The method according to claim 1,
The wet etching process
Masking the portions other than the cut regions of the original glass and spraying and spraying an etchant to the cut regions to etch and cut.

The method according to claim 6,
The wet etching process
Masking the portion other than the cut region of the original glass, carrying the portion of the original glass on the etchant to partially etch the cut region, and etching the cut etched region by spraying the second etchant in a second order.

The method according to claim 1,
The step of forming the glass cell block
Wherein a plurality of glass cells are stacked on one another using a double-sided adhesive film between the glass cells.

delete

The method according to claim 1,
The finishing and chamfering step
Wherein the chamfering of the glass cell block is performed with a glass cutting tool having a straight blade since the outer shape of the glass cell is formed in the step of chamfering the glass cell block simultaneously, Way.

The method according to claim 1,
The finishing and chamfering step
Wherein the chamfering of the glass cell block is simultaneously chamfered using a glass processing tool having chamfered chambers corresponding to the number of chambers laminated on the glass cell block.