KR20210115089A - Apparatus for glass bending and method for bending using thereof - Google Patents

Abstract

The present invention relates to a glass bending device and a bending method using the same. More specifically, the present invention relates to a glass bending device by heat and a bending method. According to the present invention, a bending method by heating glass places heated glass on two plates disposed to form a horizontal plane and adjusts an angle of at least one plate to make an angle between the plates large. According to the present invention, a glass bending area is entirely increased in a bending process of glass so that corrugations due to shrinkage can be prevented, thereby overcoming a polishing problem.

Description

Glass bending device and bending method using the same

The present invention relates to a glass bending apparatus and a bending method using the same, and more particularly, to a glass bending apparatus and a bending method by heat.

The demand for curved glass processing is increasing in the fields of smartphones, TVs, monitors, and vehicle monitors. For the processing of the curved glass, a thermoforming method is mainly used in which the glass is placed in a high-temperature furnace and heated, and then the glass is bent using a press.

This press thermoforming method enables rapid bending and is advantageous for small glass processing, but there is a difficult side in large size, and the side in contact with the press changes to white and fine wrinkles are formed on the back side of the band. There is a disadvantage that a polishing process is required after bending. In addition, polishing is a process that requires manpower, time, and cost, and there is a continuing demand for a manufacturing method or apparatus that can avoid it.

Korean Patent Publication No. 10-2017-34906 filed by LaserApps Co., Ltd. discloses a glass and tempered glass bending method using a laser. The molding time can be shortened by placing the glass plate on the heating chamber and the heated jig and preheating it, heating the curved part locally using a lamp and laser to quickly heat it to the processing temperature and then bending it. There is a problem that the treatment process is not solved.

An object to be solved in the present invention is to provide a new apparatus capable of bending glass without wrinkles due to bending or whitening due to press.

Another problem to be solved in the present invention is to provide a new method capable of processing glass without wrinkles or whitening by pressing.

In order to solve the above problems, the present invention

After seating the heated glass on two plates arranged to form a horizontal plane, there is provided a glass bending method, characterized in that the angle of at least one plate is adjusted to increase the angle between the plates.

Although not limited in theory, the occurrence of wrinkles on the lower surface in the process of bending the glass from top to bottom by gravity or press is because the base line of bending is at the upper surface or inner center of the glass, so the upper part of the glass during the bending process is While stretching, the lower surface of the glass shrinks and creases occur. If the angle between the plates increases while supporting the glass with two horizontal plates, a banding reference line is formed on the surface of the plate, and the glass in contact with the plate during the bending process. The lower surface of the wrinkle is stretched to prevent the formation of wrinkles.

In the present invention, the angle between the two plates may increase from 1 to 45°, preferably from 1 to 40°, more preferably from 1 to 30°, even more preferably from 1 to 25°, and the two plates The angles between are, for example, 181°, 182°, 183°, 184°, 185°,186°, 187°, 188°, 189°, 190°, 191°, 192°, 193°, 194°, 195°, 196°, 197°, 198°, 199°, 200°, 205°, 210°.

In the present invention, the angle between the two plates may be adjusted together or separately, and preferably, the angle between the two plates may be adjusted at the same time to reduce the stress applied to the glass during bending.

In the practice of the present invention, the inclination of the plate can be adjusted by raising or lowering one side of the plate, and raising or lowering one side while raising or lowering the other side can be adjusted, and the rising or lowering of one side of the plate is the plate It can be achieved through the raising or lowering of the support member supporting the lower part of the.

In the present invention, the plate may be a temperature-controllable plate, preferably a plate whose surface temperature is controlled by internal heating.

In the present invention, the two plates may be spaced apart from each other at a predetermined interval or arranged side by side in connection with each other.

In the present invention, the glass seated on the plate can be bent by adjusting the angle of the plate, so that the bending portion is glass heated to a temperature above the glass transition temperature, preferably 100 ~ 600 ℃ higher than the glass transition temperature. have.

In the practice of the present invention, the heating of the glass may be made through convection, radiation, conduction, or a combination thereof, and preferably, the glass is first heated as a whole through preheating, and the glass is heated as a whole by using a plate. Secondary heating, and selectively tertiary heating of the bending portion of the glass through light such as laser or IR. In a preferred embodiment of the present invention, the lower surface of the glass may be heated by a plate, and the upper surface may be heated by an upper cover plate disposed at a predetermined distance from the upper surface of the glass.

In the present invention, the bent glass can be demolded by cooling by lowering the temperature to below the glass transition temperature in the bent state, preferably at a temperature of 100 to 500 ℃ below the glass transition temperature to remove residual stress. It can be annealed by heating for a predetermined period of time.

The present invention in one aspect,

A plate portion comprising a first plate and a second plate; and

a heating unit for heating at least a portion of the glass to a bendable temperature or higher;

It provides a glass bending device comprising a; inclination adjustment unit for adjusting the inclination of at least one plate to increase the angle between the first plate and the second plate.

In the present invention, the plate may be a temperature controllable plate, preferably a surface temperature controllable plate. The plate may include an upper plate on which the glass is seated and a lower plate to be heated, and an air layer is formed at a predetermined distance between the upper plate and the lower plate so that heat generated from the lower plate is transferred to the upper plate by convection. It is desirable to prevent thermal agglomeration of the plate surface.

In the present invention, the heating unit may be a device that is installed separately from the heating device of the first plate and the second plate to heat the glass, preferably a local heating device that locally heats the area where the glass is to be bent. . In the practice of the present invention, the local heating device may be an optical heating device, and in a preferred embodiment, the optical heating device may be a plurality of IR heaters or lasers focused on a bending area.

In the present invention, the inclination adjusting device may be a vertical moving member that is positioned at the lower end of one side and moves up and down. When the vertical moving member rises, one side of the plate rises and the plate is inclined.

In the practice of the present invention, the vertical movement member may be a joint vertical movement member for simultaneously supporting the lower end of one side of the first plate and the lower end of the other side of the second plate, and the first plate and the second plate according to the rise of the joint vertical movement member is inclined while forming a predetermined angle.

In a preferred embodiment of the present invention, the first plate and the second plate can control the inclination of the cavity at the same time, the inclination of the first plate and the second plate can be adjusted by the upper and lower members in the state coupled to the hinge. have.

In the present invention, the plate may further include a top surface heating device to heat the top surface of the glass. The upper surface heating device may be a plate for upper surface heating.

In the practice of the present invention, the upper surface heating plate may be disposed adjacent to the glass, and is composed of two plates so as not to interfere with the angle adjustment of the first plate and the second plate in the adjacent state in the glass, each of the first It is fixed to the plate and the second plate spaced apart a predetermined distance, the angle can be adjusted together with the first plate and the second plate.

The present invention in one aspect,

preheating the sheet glass;

Seating the plate glass, a plate portion including a first plate and a second plate, and a glass bending device comprising a tilt adjustment portion for adjusting the inclination of the first plate and the second plate;

moving the glass bending device so that the heating unit heats the bending area;

heating the bending region by the heating unit;

bending the glass by adjusting the inclination of at least one plate to increase the angle between the first plate and the second plate;

cooling the bent glass by moving the glass bending device;

demolding the cooled glass;

The glass bending device demolding the glass is rotated to seat the glass;

It provides a continuous banding method comprising a.

In the present invention, the glass bending device includes a cover portion for heating the upper surfaces of the first plate and the second plate, the glass is slid and is seated by moving between the plate portion and the cover portion.

In the present invention, the cover plate in the glass bending device is heated to a predetermined temperature to heat the glass and prevent the surface of the glass from being cooled by the atmosphere.

In the present invention, the glass bending device is coupled to a nut-type member coupled to a bolt-type shaft and fixed to a moving plate that reciprocates by rotation of a motor and can reciprocate.

According to the present invention, it is possible to prevent wrinkles due to shrinkage while the bending area of the glass is stretched as a whole in the bending process of the glass. In addition, it is possible to solve the polishing problem caused by this.

In addition, in the bending device according to the present invention, the cover can heat the glass, so that bending is possible without a separate high-temperature chamber. In particular, the effect of the present invention is remarkable in that it is difficult to maintain a uniform temperature in a large high temperature chamber as well as an expensive large high temperature chamber when bending a thin glass for a large display such as an automobile display or TV.

In addition, continuous operation is possible by the reciprocation of the bending device, so that there is an effect of high productivity.

1 is a view showing a side of a glass bending device according to an embodiment of the present invention.
FIG. 2 is an enlarged side cross-sectional view of the plate part 100 and the cover part 200 in the glass bending device of FIG. 1 .
Figure 3 is a view showing a side of the bending state of the glass bending device of Figure 1;
4 is an enlarged side cross-sectional view of the plate part 100 and the cover part 200 in the glass bending device of the bending state of FIG. 3 .
5 is a view showing the flow of the bending process using the glass bending device of FIG.

Hereinafter, the present invention will be described in detail through examples. The following examples are intended to illustrate the present invention in detail, not to limit the present invention.

1 to 2, the flat glass 10 bending device 1 according to the present invention includes a plate portion 100 including a first plate 110 and a second plate 120; and The first cover 210 is spaced apart from the first plate 110 by a predetermined distance to cover the upper surface of the first plate 110 , and the second plate 120 is spaced apart from the second plate 120 by a predetermined distance. The upper surface is covered by the upper cover 200 made of the second cover 220 , and the heating unit 300 for heating the bending area B between the first plate 110 and the second plate 120 , and ; and an inclination adjusting unit 400 for adjusting the inclination of the first plate 110 and the second plate 120 .

The plate part 100 is a second plate ( 120) are arranged side by side adjacent to the same height.

The first plate 110 includes a first upper plate 111 of a predetermined thickness supporting the lower surface of the flat glass 10 , a first heating plate 112 disposed under the first upper plate 111 , and the second 1 The first spacer member 130 for preventing the heating plate 112 from directly heating the first upper plate 111 is integrally formed. The first spacer 130 is formed along the edge of the first heating plate (112). The first heating plate 112 has a built-in first heating member 114 whose temperature is controlled, and the first heating member 114 may be a coil heated by electricity or a coil tube heated by a fluid. .

The second plate 120 includes a second upper plate 121 of a predetermined thickness supporting the lower surface of the flat glass 10 , a second heating plate 122 disposed under the second upper plate 121 , and the second upper plate 121 . The first spacer member 130 for preventing the second heating plate 122 from directly heating the second upper plate 121 is integrally formed. The first spacer 130 is formed along the edge of the first heating plate 122 . The second heating plate 122 has a built-in second heating member 124 whose temperature is controlled, and the second heating member 124 may be a coil heated by electricity or a coil tube heated by a fluid. .

The cover part 200 is spaced apart from the upper surface of the flat glass 10 to be bent and covered by a predetermined interval, and the first cover 210 so as not to interfere with the heating of the bending region B of the heating part 300 . and the second cover 220 are spaced apart from each other by a predetermined distance and arranged side by side.

The first cover 210 includes a first cover plate 211 having a predetermined thickness in a rectangular shape covering the upper surface of the flat glass 10 , and a first cover heating plate disposed on the first cover plate 211 . (212) and the first cover heating plate 212 is made integrally with the first spacer member 130 for preventing the first cover plate 211 from being directly heated. The first spacer 130 is formed along the edge of the first cover heating plate 212 . The first cover heating plate 212 has a built-in first cover heating member 214 whose temperature is controlled therein, and the first cover heating member 214 is a coil heated by electricity or a coil tube heated by a fluid. can be

The second cover 220 includes a second cover plate 221 having a predetermined thickness in a rectangular shape that covers the upper surface of the flat glass 10 , and a second cover heating plate disposed on the second cover plate 221 . 222 and the first spacer member 130 for preventing the second cover heating plate 222 from directly heating the second cover plate 221 are integrally formed. The first spacer 130 is formed along the edge of the second cover heating plate 222 . The second cover heating plate 222 has a built-in second cover heating member 224 whose temperature is controlled therein, and the second cover heating member 224 is a coil heated by electricity or a coil tube heated by a fluid. can be

The first plate 110 and the first cover 210 are spaced apart by a first interval from the thickness of the flat glass 10 that is processed so that the glass can enter, and the inclination of the first plate 110 is adjusted in the bending process. When it is inclined, the second spacer 140 fixed to the first plate 110 and the first cover 210 is positioned on one side so that the inclination can be adjusted at the same angle while maintaining the first interval.

The second plate 120 and the second cover 220 are spaced apart at a second interval equal to the first interval than the thickness of the flat glass 10 that is processed so that the glass can enter, and the second plate 210 is bent. When the inclination is adjusted and inclined in the process, the second spacer 140 is fixed to the second plate 210 and the second cover 220 on the other side so that the inclination can be adjusted at the same angle while maintaining the second interval. ) is located.

The heating part 300 is disposed on the upper part of the cover part 200 , and forms a gap between the first cover 210 and the second cover 220 to prevent blocking by the cover part 200 . heat is transmitted through The heating unit 300 is composed of a plurality of IR light sources 310, and for effective transmission through the gap between the first cover 210 and the second cover 220, each angle is adjusted to collect light through the gap. do.

The inclination adjustment unit 400 includes a movable plate member 410 that carries and moves the plate part 100 and the cover part 200, and a vertical movable member 420 positioned at the center of the lower end of the plate part 100; It consists of a hinge member 430 for interlocking the first plate 110 and the second plate 120 .

The moving plate part 410 is a nut-type member on the inner surface of which the bolt-type rotation shaft 411 rotates by the motor M, and is coupled to the bolt-type rotation shaft 411 so that the bolt-type rotation shaft 411 moves according to the rotation. It is coupled to the upper part of the 412 and moves.

The vertical movement member 420 is seated in a rectangular parallelepiped seating groove 414 formed on the upper surface of the movable plate 413, and is a rod-shaped vertical movement member having a predetermined thickness, the lower center of the plate part 100, It is positioned over one lower end side of the first plate 110 and the other lower end side of the second plate 120 in a state of being seated in the seating groove 414 . When the vertical movement member 420 rises while simultaneously supporting the lower end of the first plate 110 and the lower end of the second plate 120, the first plate 110 is inclined to one side, and the second plate 120 is raised. ) is inclined to the other side.

The hinge member 430 is rotatably coupled to a hinge shaft 421 that horizontally passes through the movable plate 413 and one side is rotatably coupled to the hinge shaft 421 and the other side of the first plate 110 . A first hinge piece 422 rotatably fixed to the side surface and a second hinge piece having one side rotatably coupled to the hinge shaft 421 and the other side rotatably fixed to the side surface of the second plate 120 . (423). As a result, the first plate 110 and the second plate 120 are vertically repeated at the same position.

As shown in FIG. 3 , the bending process of the flat glass 10 using the flat glass 10 bending apparatus 1 according to the present invention is as follows.

As shown in Figure 5a, the flat glass bending device (1) is located on one side of the long extended bolt-type rotation shaft 411 rotated by the motor (M). The plate part 110 and the cover part 200 maintain a heated state.

As shown in FIG. 5B, the preheated plate glass 10 is seated in the gap between the plate part 110 and the cover part 200, and the preheated glass enters the gap in a sliding manner in the z-direction. is settled The seated glass is heated in a narrow space between the plate part 100 and the cover part 200 for a predetermined time.

As shown in Fig. 5c, when the glass is sufficiently heated, the bolt-type rotational shaft 411 is rotated by the operation of the motor (M), the bolt-type rotational shaft 411 is coupled to the nut-type member 412 and on it The coupled moving plate 410 moves in the x-direction so that the gap between the first cover 210 and the second cover 220 matches the focus of the heating unit 300 . By heating the bending sphere (B) of the glass through the heating unit 300, the temperature is raised to a bendable temperature.

As shown in FIG. 5D , when the glass temperature rises to a bendable temperature by the heating unit 300 , the vertical movement member 420 is raised, and the inclination of the first plate 110 and the second plate 120 . to bend the plate glass 10 by adjusting the .

As shown in Fig. 5e, the plate glass 10 is further moved in the x-direction using a motor in a bent state to stop heating by the heating unit 300, and the plate part 100 and the cover part After cooling the bent glass by controlling the temperature of (200), it is demolded by sliding. The glass bending device in which the glass is demolded returns to its original position to seat the preheated glass, and the demolded glass is maintained in a post-heated state for a predetermined time for aging, and then the temperature is lowered to room temperature to perform the bending process. shut it down

1: Glass banding device
10: sheet glass
100: plate part
200: cover part
300: heating unit
400: inclination adjustment unit

Claims (16)

In the method of bending by heating glass,
A method characterized in that after seating the heated glass on two plates arranged to form a horizontal plane, the angle of at least one plate is adjusted so that the angle between the plates is increased. According to claim 1,
Method, characterized in that the angle between the two plates is increased by 1 to 45 °. According to claim 1,
Method, characterized in that the angle between the two plates is adjusted together. According to claim 1,
The plate is a method, characterized in that the angle is adjusted by raising or lowering one side of each plate. According to claim 1,
The method of claim 1 , wherein the glass is heated using preheating, plate heating and bending area heating. 6. The method of claim 5,
The glass is a method characterized in that the lower surface is heated by the plate, the upper surface is heated by the cover plate. A plate portion comprising a first plate and a second plate; and
a heating unit for heating the bending area of the glass to a temperature that can be bent;
Glass bending device comprising a; inclination adjustment unit for adjusting the inclination of at least one plate to increase the angle between the first plate and the second plate. 8. The method of claim 7,
The plate is a glass bending device, characterized in that the heating plate that can control the temperature. 9. The method of claim 8,
The plate is a glass bending device, characterized in that it comprises an upper plate on which the glass is seated, a lower plate to be heated, and an air layer. 8. The method of claim 7,
The heating unit is a glass bending device, characterized in that the light heater. 8. The method of claim 7,
The heating unit is a glass bending device further comprising a plate for heating the upper surface. [Claim 12] The glass bending device according to claim 11, wherein the upper surface heating plate comprises two plates fixed to the first plate and the second plate, respectively. 8. The method of claim 7,
The inclination adjusting device is a glass bending device, characterized in that the plate is located at the lower end of one side and is a vertical moving member that moves up and down. 13. The method of claim 12,
The vertical movement member is a glass bending device, characterized in that it is a joint vertical movement member for simultaneously supporting the opposite lower ends of the first plate and the second plate. 15. The method of claim 13 or 14,
The vertical moving member is installed on the moving plate member to move the plate portion, the first plate and the second plate is a glass bending device, characterized in that coupled to a hinge member fixed to the moving plate member. preheating the sheet glass;
Seating the plate glass, a plate portion including a first plate and a second plate, and a glass bending device comprising a tilt adjustment portion for adjusting the inclination of the first plate and the second plate;
moving the glass bending device so that the heating unit heats the bending area;
heating the bending region by the heating unit;
bending the glass by adjusting the inclination of at least one plate to increase the angle between the first plate and the second plate;
cooling the bent glass by moving the glass bending device;
demolding the cooled glass;
The glass bending device demolding the glass is rotated to seat the glass;
A continuous bending method of glass comprising a.

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