KR101828036B1

KR101828036B1 - Cutting method of glass

Info

Publication number: KR101828036B1
Application number: KR1020160078052A
Authority: KR
Inventors: 박상배; 이해동
Original assignee: 에이엠테크놀로지 주식회사
Priority date: 2016-06-22
Filing date: 2016-06-22
Publication date: 2018-02-09
Also published as: KR20180000191A

Abstract

The present invention relates to a method for manufacturing a glass substrate, comprising the steps of forming a scribing groove in the center of the glass while irradiating a laser beam along a position to cut the glass, a position of a vertical surface of the glass corresponding to a position where the scribing groove is formed, And simultaneously cutting the glass while the cutting grooves connected to the scribing grooves are formed on the upper and lower surfaces of the glass by simultaneously spraying the abrasive to the vertically lower surface positions of the glass corresponding to the formed positions.
Such a glass cutting method is characterized in that a laser is irradiated on a glass to form a scribe groove in the center of the glass and then a cutting groove is formed so as to be connected to the scribe groove while spraying the abrasive on the upper and lower surfaces of the glass, This eliminates the need for additional chamfering and polishing of the cut surface of the glass, thereby simplifying the cutting process of the glass, thereby increasing the production efficiency.

Description

{Cutting method of glass}

The present invention relates to a method of cutting glass to refine unreinforced and reinforced disc glass into unitary glass.

In general, glass products are regarded as essential components in a wide range of technologies and industrial fields such as monitors, cameras, VTRs, mobile phones, video and optical equipment, automobile transportation equipments, various tableware, and building facilities. A glass having various physical properties is manufactured and used according to the characteristics of the glass.

In recent years, the use of a touch screen panel centering on a mobile display has been rapidly expanding due to the rapid spread of smart phones. Such a touch screen panel has a function of high light transmittance and mechanical For durability, the tempered glass may be used as a cover glass or a cover window, or the unreinforced glass may be cut to suit the purpose of use and then subjected to tempering treatment.

In recent years, an initial crack has been formed on a glass surface by using a laser beam, and then a cutting line is heated to a high temperature A method is employed in which rapid cracking is performed while the glass is cracked using thermal stress by rapid cooling.

However, in the conventional glass cutting method, additional chamfering and polishing processing must be performed on the cut surface again after the scribing process is performed after cutting / heating / cooling, and the process becomes complicated, resulting in a problem of low productivity.

Such a technique of cutting glass is disclosed in Korean Patent Registration No. 10-1484091 (2015.01.13).

An object of the present invention is to provide a glass cutting method in which productivity is improved by simplifying a cutting process for subdividing glass into unit glass.

The present invention relates to a method for manufacturing a glass substrate, comprising the steps of: forming a scribe groove in the center of the glass while irradiating a laser beam along a position to cut the glass; a vertical surface position of the glass corresponding to a position where the scribe groove is formed; And cutting the glass while simultaneously forming a cut groove connected to the scribe groove on the upper and lower surfaces of the glass by simultaneously spraying the abrasive to the vertical bottom surface position of the glass corresponding to the position where the scribe groove is formed A method for cutting glass is provided.

Further, the laser beam may be an ultra-fast laser.

After the glass is cut while the cutting grooves connected to the scribing grooves are formed on the upper and lower surfaces of the glass by spraying the abrasive material, the cut surface of the glass is brought into contact with the hydrofluoric acid solution to cut the cut surface And then mirror-finished.

The step of covering the surface of the glass other than the cut surface of the glass so as to prevent the surface of the glass other than the cut surface of the glass from being in contact with the hydrofluoric acid solution before the cut surface of the glass is brought into contact with the hydrofluoric acid solution As shown in FIG.

Further, in the step of covering the surface of the glass, wax may be applied to the surface of the glass other than the cut surface of the glass.

In addition, in the step of covering the surface of the glass, a film of synthetic resin may be attached to the surface of the glass other than the cut surface of the glass.

According to the present invention, there is provided a method for cutting a glass, comprising: forming a scribing groove in the center of the glass by irradiating a laser to the glass; forming a cut groove to be connected to the scribing groove while spraying the abrasive on the upper and lower surfaces of the glass; So that it is not necessary to perform additional chamfering and polishing on the cut surface of the glass, so that the cutting process of the glass is simplified and the production efficiency is increased.

1 is a flowchart showing a glass cutting method according to an embodiment of the present invention.
2 is a perspective view showing the state of step S100 of FIG.
3 is a state sectional view showing the step S100 of FIG.
4 is a state perspective view showing the step S110 of FIG.
5 is a state sectional view showing step S110 of FIG.
6 is a state diagram of glass cut through a glass cutting method according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1 is a flowchart showing a glass cutting method according to an embodiment of the present invention. Referring to FIG. 1, a method of cutting a glass includes forming a scribing groove 110 in the center of the glass 100 (S100), moving the scribing groove 100 on the upper and lower surfaces of the glass 100 And cutting the glass 100 by forming the cut groove 120 (S110).

First, the glass 100 to be cut is prepared. At this time, a virtual cut line (not shown) drawn along the position to be cut may be shown on the surface of the glass 100. The cutting line may be formed of at least one straight line, a curved line, or a closed curve depending on the cut shape of the glass 100.

Referring to FIGS. 2 and 3, a scribing groove 110 is formed along the position to be cut at the inner center of the prepared glass 100 (S100). The scribing groove 110 is formed by irradiating a laser along the position of the glass 100 to be cut. At this time, the laser is an ultrafast laser (picosecond laser or femtosecond laser) so that the scribing groove 110 can be formed in the center of the glass 100.

When the scribing groove 110 is formed in the inner center of the glass 100 so that the cutting groove 120 is formed on the upper and lower surfaces of the glass 100 to be connected to the scribing groove 110, The glass 100 is cut (S110). At this time, the cutting grooves 120 are formed through a sanding process for jetting the abrasive material to the surface of the glass 100 at a high speed. Referring to FIGS. 4 and 5, the abrasive may include a vertical top surface position of the glass 100 corresponding to a position at which the scribing groove 110 is formed, and a vertical top surface position of the scribing groove 110, The cut grooves 120 connected to the scribe grooves 110 are formed in the same shape while being sprayed at a constant speed and an injection amount to the vertical lower surface position of the glass 100.

As shown in FIG. 6, the glass 100 is cut so that the cut grooves 120 are extended from the upper and lower surfaces of the glass 100 to be connected to the scribe grooves 110, respectively. . At this time, the cutting groove 120 is formed by abrasion of the surface of the glass 100 by the jetting force of the abrasive. By simultaneously realizing the chamfering effect on the cut surface of the glass 100, 100 without additional chamfering and polishing processes.

The surface of the glass 100 other than the surface portion of the glass 100 on which the cut groove 120 is to be formed may be covered with a protective cover before the abrasive is sprayed onto the upper surface and the lower surface of the glass 100 (Not shown) so as to be able to prevent damage by the abrasive.

Thus, after the glass 100 is cut, a step of smoothly mirror-polishing the cut surface of the glass 100 can be further performed. That is, in the mirror surface treatment of the cut surface of the glass 100, the cut surface of the glass 100 comes into contact with the hydrofluoric acid solution to partially melt the cut surface of the glass 100. At this time, the cut surface of the glass 100 may be dipped in the hydrofluoric acid solution or may be contacted by spraying the hydrofluoric acid solution with a spray.

In order to prevent the surface of the glass 100 other than the cut surface of the glass 100 from contacting the hydrofluoric acid solution before the cut surface of the glass 100 is contacted with the hydrofluoric acid solution, A step of covering the surface can be performed. The step of covering the surface of the glass 100 may include coating the surface of the glass 100 except the cut surface of the glass 100 with wax or removing the glass 100 from the cut surface of the glass 100 100 may be attached to the film. Here, the film is a synthetic resin, and more specifically, it is made of at least one selected from the group consisting of polyvinyl chloride, polyolefine, polyethylene, and polyethylene terephthalate However, the present invention is not limited thereto.

The method for cutting glass according to an embodiment of the present invention includes the steps of forming a scribe groove 110 in the center of the glass 100 by irradiating laser to the glass 100, The cutting groove 120 is formed so as to be connected to the scribing groove 110 while the abrasive is sprayed to the lower surface and the lower surface of the glass 100 so that the glass 100 is cut. By eliminating the need for the polishing process, the cutting process of the glass 100 is simplified and the production efficiency is increased.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Glass 110: Scribing Home
120: Cutting groove

Claims

Forming a scribe groove in the center of the glass along the cut line while irradiating a laser beam along a virtual cut line drawn along a position to cut the glass;
The cutting line shown at the position of the vertical top surface of the glass corresponding to the position where the scribing groove is formed and the cutting line shown at the vertical bottom position of the glass corresponding to the position where the scribing groove is formed, And cutting the glass while the top and bottom surfaces of the glass are formed with the same shape of a cut groove connected to the scribing groove.

The method according to claim 1,
Wherein the laser beam is an ultra-violet laser.

The method according to claim 1,
After cutting the glass while forming cutting grooves connected to the scribing grooves on the upper and lower surfaces of the glass by spraying the abrasive,
Contacting the cut surface of the glass with a solution of hydrofluoric acid to melt the surface of the cut surface of the glass and mirror-finish the glass.

The method of claim 3,
Covering the surface of the glass other than the cut surface of the glass so that the surface of the glass other than the cut surface of the glass is prevented from being in contact with the hydrofluoric acid solution before the cut surface of the glass is brought into contact with the hydrofluoric acid solution A method of cutting an inclusive glass.

The method of claim 4,
Wherein covering the surface of the glass comprises:
And the wax is applied to the surface of the glass other than the cut surface of the glass.

The method of claim 4,
Wherein covering the surface of the glass comprises:
And attaching a film made of synthetic resin to the surface of the glass other than the cut surface of the glass.