KR102171183B1 - Method for manufacturing curved tempered low-e glass - Google Patents

Abstract

Disclosed is a method of manufacturing a curved low-E glass by subjecting a low-E glass with a coating layer formed thereon to a curved surface.
A method of manufacturing a curved reinforced low-E glass includes a cutting step of cutting a flat low-E glass having a plate shape into a desired size and shape; An edge operation step of peeling the coating layer applied to the edge of the cut flat low-E glass; A washing step of washing the flat low-E glass from which the edge coating layer is peeled off; A curved surface strengthening operation step of performing a strengthening process while forming the washed flat low-E glass into a curved surface; It may include.
In the step of strengthening the curved surface, the low-E glass is interposed between the upper support means and the lower support means, and the upper support means may be configured to contact the exposed portion where the glass surface is exposed by removing the coating layer of the low-E glass.

Description

Manufacturing method of curved reinforced low-E glass {METHOD FOR MANUFACTURING CURVED TEMPERED LOW-E GLASS}

The present invention relates to a method of manufacturing a curved tempered glass, and more particularly, to a method of manufacturing a curved tempered low-E glass by curing a low-E glass having a coating layer formed on one side thereof.

In order to further improve the insulation effect to increase the cooling and heating efficiency and maximize the energy saving effect, Low-E glass with a coating layer formed on the glass surface has been developed and is widely used for construction.

Low-E glass is formed by coating a metal such as silver (Ag) on the surface of the glass to form a metal coating film. Usually, one low-E glass and one general glass are overlapped to produce a multilayer glass and used as a building material.

More specifically, low-E glass is also referred to as low-emissivity and has a low emissivity, so when installed in a building, it has a high thermal insulation effect, which helps to save energy. Since the low-E glass has a coating layer formed on one surface of the glass, it is usually processed into a multilayer rather than a single plate. The low-E glass manufactured as a double layer is made so that the coated surface is usually outside of the inner glass that is located indoors, based on the state installed in the building.

Heat conduction can be minimized by charging air (dry air) or an inert gas such as argon or krypton gas in the space between the glass of the low-E glass made of a double layer.

Low-E glass can keep the room bright by transmitting most of the visible light coming through the window, while the infrared ray radiation can be effectively blocked by the coating layer. Therefore, it has the advantage of being able to save energy since it can block indoor heat from escaping to the outside in winter and block outside heat in summer. Because of this advantage, low-E glass is widely used for windows or lighting of houses or general buildings.

Depending on the number of times the coating layer is formed, one coated one is called a single low-E glass, two times coated is called a double low-E glass, and three times coated is called a triple low-E glass. The more the number of coatings, the better the effect.

In addition, according to the coating manufacturing method, low-E glass is made of hard low-E glass by the pyrolytic process and soft low-E glass by the sputtering process. Can be distinguished.

Hard low-E glass is manufactured by spraying a metal solution or powder on the surface of the plate glass and performing thermal coating during the plate glass manufacturing process. The coating material is a metal oxide. Hard low-E glass has strong coating hardness and durability due to thermal coating, so heat treatment such as reinforcement processing is possible. However, the use of several metals is limited, so the color is simple, the insulation performance is lower than that of the soft low-E glass, and the coating film is cloudy.

Soft low-E glass is produced by putting already produced plate glass in a separate vacuum chamber and coating a multi-layered thin film of metal such as silver (Ag), titanium (Ti), and stainless steel. Soft low-E glass has high transparency and can implement various colors by using various metals, and has excellent optical and thermal performance. However, compared to hard low-E glass, there is a disadvantage in that the coating hardness and durability are weak.

As the demand for high-functional glass windows with excellent sound insulation and insulation effects in various fields increases, the demand for tempered low-E glass is also increasing.

In general, tempered glass is made by rapidly cooling the heated glass surface during the glass manufacturing process to give the surface compressive strength, and slowly cooling the inside to give it tensile strength. By arranging the prepared tempered glass in double or triple, sound insulation and heat insulation effects can be improved.

However, since the low-E glass has a coating layer formed on the surface of the glass, it is impossible to perform the strengthening treatment in the same manner as the general flat glass.

Furthermore, as buildings are built in a curved shape with the development of architectural technology and pursuit of aesthetics, the demand for not only tempered flat low-E glass but also tempered curved low-E glass is increasing. As described above, since the low-E glass has a coating layer formed on the surface of the glass, there is a problem that the curved surface strengthening treatment cannot be performed in the same manner as the general flat glass surface strengthening treatment.

The present invention is to solve the above-described problems, and to provide a method for manufacturing a curved low-E glass for manufacturing a curved low-E glass by curing a low-E glass having a coating layer formed on one side thereof.

According to an aspect of the present invention for achieving the above object, as a method of manufacturing a curved low-E glass by curing a low-E glass having a coating layer formed on one side thereof, a flat low-E glass having a plate shape is prepared in a desired size and shape. A cutting step of cutting; An edge operation step of peeling the coating layer applied to the edge of the cut flat low-E glass; A washing step of washing the flat low-E glass from which the edge coating layer is peeled off; A curved surface strengthening operation step of performing a strengthening process while forming the washed flat low-E glass into a curved surface; Including, in the step of strengthening the curved surface, the low-E glass is interposed between the upper support means and the lower support means, wherein the upper support means is in contact with the exposed portion of the glass surface by removing the coating layer of the low-E glass. A method of manufacturing a curved reinforced low-E glass may be provided.

The curved surface strengthening operation step includes a heating step of heating the low-E glass washed in the washing step, and a bending step of curving the heated low-E glass to have a radius of curvature, and in the bending step, the upper support means is It may contact the exposed portion of the low-E glass.

The curved reinforcement operation step may further include a rapid cooling step of rapidly cooling the surface by spraying air on the heated and curved low-E glass, and a cooling step of gradually cooling the rapidly cooled low-E glass.

In the bending step, the upper support means may contact the exposed portion at the top of the low-E glass, and the lower support means may contact the low-E glass at the bottom of the low-E glass.

The upper support means and the lower support means each consist of a plurality of rollers, and the rollers included in the upper support means have a width equal to or smaller than the width of the exposed part, and a roller included in the lower support means May have a width equal to or greater than the overall width of the low-E glass.

The exposed portion exposed by removing the coating layer in the edge working step may have a width of 10 to 20 mm from the end of the glass.

According to the present invention, there can be provided a method for manufacturing a curved reinforced low-E glass for manufacturing a curved reinforced low-E glass by curing a low-E glass having a coating layer formed on one side thereof.

According to the method of manufacturing a curved reinforced low-E glass according to the present invention, it is possible to accurately manufacture a curved reinforced low-E glass according to a required radius of curvature, and to reduce time and cost by lowering a product defect rate.

1 is a block diagram illustrating a method of manufacturing a curved reinforced low-E glass according to an embodiment of the present invention.
2 is a conceptual diagram of a curved surface strengthening facility for performing a curved surface strengthening treatment.
3 is a conceptual diagram of a grain forming machine included in a curved surface reinforcement facility.
4 is a view taken along the direction of arrow A in FIG. 3.
5 is a conceptual diagram for explaining a double-layer operation using a curved reinforced low-E glass.

Hereinafter, a method of manufacturing a curved reinforced low-E glass according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. 1 is a block diagram illustrating a method of manufacturing a curved reinforced low-E glass according to an embodiment of the present invention.

As shown in Figure 1, according to the method for manufacturing a curved reinforced low-E glass according to an embodiment of the present invention, the curved reinforced low-E glass has a coating layer applied to one surface and a flat plate low-E glass having an approximately flat plate shape is desired. A cutting step (S10) of cutting into size and shape, an edge working step (S20) of peeling off the coating layer applied to the edge of the cut flat low-E glass, and washing the flat low-E glass from which the edge coating layer is peeled off. It is manufactured through a washing step (S30) and a curved surface reinforcing operation step (S40) of reinforcing while forming the washed flat low-E glass into a curved surface.

The method of manufacturing a curved tempered low-E glass according to an embodiment of the present invention may further include a multilayer operation step (S50) for manufacturing a curved multilayer glass by overlapping the curved tempered low-E glass with the general glass. .

In the cutting step (S10), the low-E glass manufactured in a flat plate is cut into a desired size and shape. The type, shape, and dimensions of the low-E glass may be changed as necessary, and the present invention is not limited thereto.

On one surface of the cut flat low-E glass, a coating layer is applied over the entire surface. In the edge working step (S20), the coating layer at the edge is removed from the coating layer applied over the entire surface of one side. The portion where the coating layer is removed and the glass surface is exposed (hereinafter, referred to as “exposed portion”) may have a width of 10 to 20 mm, or 12 to 18 mm, or approximately 15 mm from the end of the glass. As will be described later, the upper support means (e.g., upper roller) of the grain molding machine may contact the exposed portion, and thus, contamination or damage of the coating layer by the upper support means of the grain molding machine can be reliably prevented. .

After the edge operation step (S20), in the washing step (S30), contaminants attached to the flat low-E glass are removed through seaming and washing operations.

The curved surface strengthening treatment in the curved surface strengthening operation step S40 may be performed, for example, in the curved surface strengthening facility 10 as shown in FIG. 2. The curved surface reinforcement facility 10 includes a loading unit 12 for inserting the washed flat low-E glass to perform a curved surface reinforcing operation, and a heating unit 14 for receiving and heating the injected low-E glass from the loading unit 12. And, a molding and cooling unit 16 for cooling the heated flat plate low-E glass after bending it into a curved shape, and an unloading unit 18 for discharging the cooled curved reinforced low-E glass.

The heating unit 14 may be, for example, a furnace that generates heat by electricity or the like. The type, size, heating conditions, etc. of the furnace forming the heating unit 14 may be changed as necessary, and the present invention is not limited thereto. The heating unit 14 may include a compressor 30 for injecting compressed air against the glass while heating the glass. Air compressed by the compressor 30 may be supplied into the heating unit 14 (ie, a heating furnace) through a pipe 32. For example, if the working conditions cannot be met due to insufficient air injection amount supplied to the glass, a part of the glass may be bent or a phenomenon such as a lens mark may occur at the center of the glass plate, resulting in a defect.

The internal temperature of the heating furnace forming the heating unit 14 may be set to about 650 to 700 degrees Celsius, and the temperature of the upper space inside the heating furnace may be set lower than the temperature of the lower space. For example, the upper space of the glass to be heated is set to a temperature of approximately 660 to 680 degrees Celsius, or approximately 660 degrees Celsius, and the lower space of the glass to be heated is approximately 680 to 700 degrees Celsius, or approximately 690 degrees Celsius. Can be set.

In addition, the heating time in the heating unit 14 may be set, for example, about 330 to 400 seconds in the case of a single flat plate low-E glass having a thickness of 6 mm, and a double (or triple) flat low-E glass having a thickness of 6 mm. In the case of, for example, it may be set to 400 to 520 seconds. In the case of the curved glass, the heating time may be set longer than the heating time of the flat glass by about 30 to 60 seconds. That is, in the case of a single flat low-E glass having a thickness of 6 mm, the heating time may be set, for example, about 360 to 460 seconds, and in the case of a double (or triple) flat low-E glass having a thickness of 6 mm, for example, 430 to 580 It can be set in seconds.

The compressor 30 may be a compressor of approximately 200 horsepower, and the air injection pressure by the compressor 30 may be set, for example, about 6 to 8 kg/cm 2, and the injection time may be approximately 60 seconds to 150 at the initial heating. It can be set in seconds. The air injection pressure can be appropriately increased or decreased while checking the condition of the product being heated.

The set temperature, heating time, and air injection pressure inside the heating furnace are examples and may be appropriately changed as necessary.

The heated low-E glass is supplied to the molding and cooling unit 16, and the molding and cooling unit 16 may include, for example, a grain molding machine 20 as schematically shown in FIG. 4. In addition, the molding and cooling unit 16 may include an air supply unit 34 for supplying air to the grain molding machine 20 for cooling the heated low-E glass.

3 and 4, the grain forming machine 20 used in the method for manufacturing a curved reinforced low-E glass according to an embodiment of the present invention includes a low-E glass to bend a flat low-E glass to a desired radius of curvature. It may include an upper support means 22 and a lower support means 24 for supporting the glass from the top and bottom, respectively.

The upper support means 22 and the lower support means 24 may each be formed of a plurality of rollers, for example. The plurality of rollers constituting the upper support means 22 may be positioned by a plurality of cylinders 26 so that an arc-shaped curve connecting the center points of the rollers has a radius of curvature desired by the user. 3 shows a state in which the cylinder 26 is operated so that an arc-shaped curve connecting the center points of the plurality of rollers constituting the upper support means 22 forms a predetermined radius of curvature.

If the piston rod (26a) of the cylinder (26) located at the center of the plurality of cylinders (26) is withdrawn longer than the piston rod (26a) of the cylinder (26) located at both ends, the upper part connected to the cylinder (26) The rollers of the support means 22 may be arranged to form a downwardly convex arc shape. According to the present embodiment, it is possible to adjust the R value of the arc formed by the rollers included in the upper support means 22 by adjusting the withdrawal length of the piston rod 26a of each cylinder 26. The rollers of the upper support means 22 may be installed on the support means body 23, and the support means body 23 may change the distance between adjacent rollers when the cylinder is operated, for example, a plurality of It may be connected by the link member 28 of.

For example, the rollers constituting the lower support means 24 may be installed so that the height from the floor can be adjusted, and thus the R value of the arc formed by the rollers included in the lower support means 24 can be adjusted. I can. For example, the heated low-E glass is shaped to have an approximate arc shape by its own weight after being supplied and seated on the lower support means 24 arranged to form an arc shape of a desired radius of curvature by adjusting the height in advance. This can be transformed. Subsequently, the upper support means 22 descends as the cylinder operates, and the low-E glass is sandwiched between the lower support means 24 and the upper support means 22 and pressurized, thereby making the low-E glass the exact radius of curvature to be made. It can be curved to have an arc shape of value.

The existing low-E glass curvature reinforcement work has a problem in that the radius of curvature is not constant and it is difficult to obtain a constant radius of curvature over the entire glass because the bending process is performed by its own weight in order not to damage the coating layer of the low-E glass. In addition, there are many restrictions on the R value and the size of the glass.

In contrast, according to the method of manufacturing a curved reinforced low-E glass according to an embodiment of the present invention, since the exposed portion is formed at the edge of the low-E glass by removing the coating layer in the edge working step, the upper support means 22 By contacting the low-E glass, it is possible to make a curved shape with an accurate radius of curvature by supporting the low-E glass from above and below without contamination or damage to the coating layer.

In FIG. 4, the low-E glass 2 is supported from the top and bottom with the upper support means 22 and the lower support means 24 so that the flat plate-shaped low-E glass can be curved to a desired radius of curvature by the grain molding machine 20. The state is shown. As shown in Fig. 4, the upper support means 22 are arranged to contact the exposed portion 4 from which the coating layer 3 has been removed. In addition, the lower support means 24 is disposed to support the lower surface of the low-E glass 2 on which the coating layer is not formed.

The roller as the upper support means 22 can have a width of a dimension equal to or smaller than the width dimension of the exposed portion 4 for example. In addition, the roller as the lower supporting means 24 may have a width equal to or greater than the overall width of the low-E glass.

Referring back to FIG. 2, for example, an air supply means 34 is disposed on the top of the grain molding machine 20, and air may be configured to be sprayed onto the glass surface through the pipe 36. The air supply means 34 may be, for example, a blowing fan. In order to spray a sufficient amount of air evenly on the glass surface, a plurality of pipes 36 may be provided. The pipe 36 may be configured to be sprayed evenly on the glass surface through a nozzle at the bottom of the support means body 23.

The air supply means 34 may be, for example, a 200 horsepower blower, and based on the maximum wind pressure of the blower as the air supply means 34, the type of tempered glass to be processed is double-strength glass (HS, Heat-strenghened glass). Glass), the wind pressure by the air supply means 34 can be set to about 25 to 30%, and the type of tempered glass to be processed is flat tempered glass (TF, Tempered Float Glass) or curved tempered glass (TC, Tempered Glass). Curved Glass), the wind pressure by the air supply means 34 may be set to about 75 to 80%. Wind pressure can be appropriately adjusted after product stress measurement and crushing test.

In the low-E glass, in the molding and cooling unit 16, a rapid cooling step of rapidly cooling the surface by spraying air on the low-E glass curved in a curved shape, and a cooling step of gradually cooling the low-E glass whose surface is rapidly cooled are sequentially performed. It can be processed while going through.

When the curved surface strengthening work performed in the molding and cooling unit 16 is completed, the curved surface strengthening low-E glass may be discharged from the curved surface strengthening facility 10 through the unloading unit 18.

The manufactured curved surface reinforced low-E glass can be continuously manufactured into a multi-layered curved surface reinforced low-E glass through a multi-layer operation. As sequentially shown in FIGS. 5A to 5D, in the multilayer operation step (S50), the curved surface strengthened low-E glass (2) subjected to the curved surface strengthening treatment is overlapped with the general glass (6) to obtain a curved multilayer glass. (9) can be produced.

The multilayer work step (S50) includes a step of preparing by washing the curved surface reinforced low-E glass (2) treated with a curved surface reinforcement (see Fig. 5 (a)), and a thin bar ( 7) arranging (see Fig. 5(b)) and preparing by washing the curved general glass 6 to have the same radius of curvature as the curved tempered low-E glass 2 (Fig. 5(c) )) and, after overlapping the curved reinforced low-E glass (2) and the general glass (6), sealing using a finishing material (8) (refer to (d) of FIG. 5) may be included.

Before being disposed on the curved reinforced low-E glass 2, the inter-bar 7 may be curved to have an R value that is approximately the same as the radius of curvature of the curved reinforced low-E glass 2.

The general glass 6 may be a curved surface strengthening treatment. In addition, in FIG. 5, it is shown that the step of washing the general glass 6 is performed after the step of washing the curved tempered low-E glass 2, but the step of washing the general glass 6 is the curved tempered low-E glass. It may be performed simultaneously with the step of washing (2), or may be performed before the step of washing the curved reinforced low-E glass (2).

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the technical spirit of the present invention. Therefore, the scope of the present invention should not be defined by being limited to the described embodiments, but should be defined not only by the claims to be described later, but also by the claims and equivalents.

2: Low-E glass, 3: Coating layer, 4: Exposed part, 6: General glass, 7: Interlayer, 8: Finishing material, 9: Curved multi-layered glass, 10: Curved reinforcement equipment, 12: Loading part, 14: Heating part, 16 : Forming and cooling part, 18: unloading part, 20: grain forming machine, 22: upper support means, 23: support means body, 24: lower support means, 26: cylinder, 26a: piston rod, 28: link member, 30 : Compressor, 32: pipe, 34: supply means, 36: pipe.

Claims (6)

As a method of manufacturing a curved reinforced low-E glass by curving a low-E glass with a coating layer formed on one side thereof,
A cutting step of cutting the flat low-E glass having a plate shape into a desired size and shape;
An edge operation step of peeling the coating layer applied to the edge of the cut flat low-E glass;
A washing step of washing the flat low-E glass from which the edge coating layer is peeled off;
A curved surface strengthening operation step of performing a strengthening process while forming the washed flat low-E glass into a curved surface;
Including,
The curved surface strengthening operation step includes a heating step of heating the low-E glass washed in the washing step, and a curving step of curving the heated low-E glass to have a radius of curvature,
In the bending step, the low-E glass is interposed between the upper support means and the lower support means, and the upper support means contacts the exposed part where the glass surface is exposed by removing the coating layer of the low-E glass from the upper part of the low-E glass. The lower supporting means is in contact with a surface of the low-E glass on which the coating layer is not formed,
The upper support means and the lower support means each consist of a plurality of rollers, and the rollers included in the upper support means have a width equal to or smaller than the width of the exposed part, and a roller included in the lower support means A method for manufacturing a curved reinforced low-E glass having a width equal to or greater than the overall width of the low-E glass. delete The method according to claim 1,
The curved reinforcing operation step further comprises a quenching step of rapidly cooling the surface by spraying air on the heated and curved low-E glass, and a cooling step of gradually cooling the rapidly cooled low-E glass. . delete delete The method according to claim 1,
The exposed portion, which is exposed by removing the coating layer in the edge working step, has a width of 10 to 20 mm from the end of the glass, and a method of manufacturing a curved reinforced low-E glass.

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