KR100690381B1 - Manufacture method of tempered safety mirror glass - Google Patents

Abstract

A process of manufacturing a tempered safety mirror glass is provided to produce the glass while preventing wave thereof, to ensure high impact resistance and safety in breaking it to protect a user, and to retain flatness of the glass by uniformly and indirectly heating the glass with convection heat and rapidly cooling the heated glass with compressed cold air having controlled moisture content. The process includes the steps of: processing a glass sheet by cutting, machining, washing and drying the glass sheet; heating the processed glass sheet by introducing the glass sheet into a heating furnace and indirectly heating the sheet at 500 to 600deg.C below a softening point of the glass with convection heat; cooling the heated glass by introducing the heated glass into a cooling device(200) and rapidly cooling the glass with compressed cold air having controlled moisture content; and producing a final reinforced mirror glass with controlled hardness by applying a reflective film on one face of the heat treated and reinforced glass, applying a coating layer on the reflective film while applying a protective film on the rear face of the glass, then drying the laminated glass to form the final mirror glass.

Description

MANUFACTURE METHOD OF TEMPERED SAFETY MIRROR GLASS}

1 is a process chart showing a manufacturing process of a conventional mirror.

Figure 2 is a process chart showing the process of the present invention manufacturing method of the reinforced safety mirror.

Figure 3 is a block diagram showing the configuration of a heating furnace which is a main component of the manufacturing method of the reinforced safety mirror of the present invention.

Figure 4 is a block diagram showing the configuration of a cooling furnace which is a main component of the manufacturing method of the reinforced safety mirror of the present invention.

<Description of the symbols for the main parts of the drawings>

100: heating furnace 101: fan

102: combustion chamber 103: transfer path

200: cooling furnace 201: air cooling chamber

202: compression compressor 203: dehumidifier

204: cooling and compressed air chamber 205: connector

The present invention relates to a method of manufacturing a reinforced safety mirror, and more particularly, in the heat treatment operation of the glass, the glass is heated below the softening point, evenly indirectly heating the entire glass by convection heat, and the heated glass is dehumidified by cooling and compressed air. Rapid cooling prevents wave phenomena of glass, secures high impact strength and safety during crushing, and prevents safety accidents that injure users, and maintains flatness of glass The present invention relates to a method of manufacturing a reinforced safety mirror in which a projection is correctly reflected.

In general, the mirror is used by treating the reflective coating on one surface of the glass. Looking at the manufacturing method of the conventional mirror, as shown in FIG. 1, the washing and drying process of washing and drying the large glass disc, and the rear of the large glass disc The silver mirror work process that performs silver mirror work on the surface, the drying process of drying the glass disc which has been processed by silver mirror work, and the surface protection coating process that performs painting work to protect the surface of the large glass plate dried after silver mirror work; Mirrors are manufactured by drying the drying process and cutting, processing and washing large glass plates.

The current mirror manufactured by this process step is pointed out as a safety problem because it is low in strength and easily broken and if broken, it is broken by sharp glass pieces, which is likely to cause injury to neighboring people.

In addition, on the back of the large glass disc, the large glass disc is cut during the work of cutting, processing, and cleaning the large glass disc as the mirror is manufactured by cutting, processing, and washing the large glass disc again in the state of completing the silver mirror work and the drying work. This crushed or cracks (crack) is generated, there is a problem that can not be used large glass discs as it is discarded as it is, bringing economic losses.

In addition, various methods for solving the safety problems of conventional mirrors have been mobilized. For example, when a glass of the mirror is broken by attaching a vinyl or a cloth behind the protective layer on the back of the mirror, glass fragments that are broken on the vinyl or the cloth are broken. This is to prevent the injury to the human body by sticking, but this is to solve the problem when the mirror is broken, it is not possible to solve the problem that is easily broken by the decrease of the strength of the mirror, workability and productivity by the additional process There is a problem of this deterioration.

Meanwhile, a method for manufacturing a safety reinforcing mirror of patent application No. 2001-37522 has been devised. This is achieved by forming a plate glass, cutting the plate glass to a desired size and shape, and processing the cut glass plate by a cutting, punching and polishing process as disclosed in the claims of the published publication. And the step of washing the processed glass plate, heat treating the cleaned glass plate in an atmosphere of 500 to 800 ° C. for 2 minutes in a heating furnace, and then cooling and strengthening the compressed glass plate with compressed air. Forming a first coating layer made of a silver thin film by coating a silver melt on one side, forming a second coating layer made of a copper thin film by coating a copper melt on the entire upper surface of the first coating layer, and the second coating layer A protective film layer is formed by at least one painting process on the entire upper surface of the second coating layer so as not to be easily peeled off.

However, the conventional method of manufacturing a conventional mirror described a general method of manufacturing a tempered safety glass, it is a common belief in the industry that a general tempered safety glass cannot produce a tempered safety mirror due to the distortion of the mirror.

The reason for this is that when the glass is heated at 500 ° C to 800 ° C in a heating furnace, the glass is heated above the softening point of the glass and the glass melts. Also, the glass is cooled by using normal temperature compressed air during cooling. This is because fine bends are formed on the surface.

In addition, since the glass heating method of the heating furnace directly heats the glass by radiant heat by a linear heating wire installed in the heating furnace, the glass surface directly below the heating wire and the glass surface that are not directly are heated by radiant heat of different temperatures. A wave phenomenon occurs on the glass surface.

In addition, the cooling method for cooling the heated glass with room temperature compressed air is a method used when manufacturing a general tempered safety glass, because the pressure and time for the heated glass is much larger than the cooling method with dehumidified cooling compressed air. As the bending phenomenon cannot be avoided on the surface of the glass, it is difficult to manufacture the mirror, which makes it impossible to manufacture a reinforced safety mirror as a product.

The present invention has been made to solve the problems of the conventional mirror, the processed plate glass is heated to 650 ℃ or less of the softening point of the glass in the heating furnace, the glass is the same temperature by indirect heating by convection heat rather than direct heating By heating the glass evenly and rapidly cooling the heated glass by the cooling compressed air dehumidified in the cooling furnace, it ensures the high impact strength and safety of the glass and prevents the user from being injured when the mirror is broken. In addition to preventing, it is an object of the present invention to provide a method of manufacturing a reinforced safety mirror to maintain the smoothness of the glass to obtain a clear mirror image.

Method for producing a reinforced safety mirror of the present invention as a means for achieving the above object, plate glass processing step of cutting, processing, washing, drying the plate glass to a certain size; A heating step of introducing the glass processed by the plate glass processing step into a heating furnace by indirect heating by convection heat at a temperature of 500 ° C. to 600 ° C. which is below the softening point of the glass (650 ° C.); A cooling step of introducing the glass heated by the heating step into the cooling furnace and rapidly cooling the dehumidified cooling compressed air of the cooling furnace; It is characterized in that it comprises a coating process for applying a reflective film on one surface of the glass strengthened by the heating process and the cooling process, a coating layer on the surface of the reflective film and a protective film on the back surface of the glass and then drying. .

In the method of manufacturing the reinforced safety mirror of the present invention having the above characteristics, the process of strengthening by heat treatment of the processed glass is heated by indirect heating by convection heat instead of direct heating, the softening point of the glass In addition to heating the glass within the range of 500 ° C. to 600 ° C., which is a temperature of 650 ° C. or lower, the glass is formed in a wave shape on the glass surface by rapidly cooling the heated glass by introducing it into a cooling furnace. This prevents unevenness and improves the smoothness of the glass to obtain a clear mirror image, and also prevents the risk of injuries to sharp and large fragments of ordinary mirrors, even if the mirror is crushed into fine pieces. can do.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings, and the terminology or words used in the specification and claims are used to explain the invention in its best way. Based on the principle that the concept of can be properly defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Figure 2 is a process diagram showing the process of the present invention manufacturing method of the reinforced safety mirror, Figure 3 is a block diagram showing the configuration of the heating furnace which is a constituent of the manufacturing method of the reinforced safety mirror of the present inventors, Figure 4 is the present inventors reinforced safety It is a block diagram which shows the structure of the cooling furnace which is an essential part of the manufacturing method of a mirror.

The manufacturing method of the reinforced safety mirror of this invention consists of a plate glass processing process, the heating process of a heating furnace, the cooling process of a cooling furnace, and a diameter changing process.

The plate glass processing step is a step of cutting a large glass disc to a certain size, then processing, washing and drying.

That is, in the related art, after the silver diameter work and the drying work are performed on the back surface of the large glass disc, the large glass disc is cut and processed to a certain size again, whereby the large glass disc is crushed or cracks are generated. Since the first glass glass processing process is first performed by cutting and processing a large-size glass disc to a certain size and then washing, the workability can be improved and economical waste can be reduced.

The heating step of the heating furnace is a step of indirectly heating the convex heat at a temperature of 500 ° C. to 600 ° C. which is below the softening point (650 ° C.) of the glass by introducing the plate glass processed by the plate glass processing step into the heating furnace.

In the heating furnace of the heating step, as shown in FIG. 3, the combustion heat of the combustion chamber 102 configured at the lower side of the fan 101 is rotated by rotating the fan 101 configured at the upper side of the heating furnace 100. The plurality of transfer paths 103 communicated with the upper side of the heating furnace 100 is configured to transfer heat to the interior of the heating furnace 100, and thus the transfer path inside the heating furnace 100 ( The glass drawn into the inside of the heating furnace 100 by convection heat introduced through 103 is indirectly heated to a temperature of 500 ° C. to 600 ° C., which is equal to or lower than the softening point of the glass (650 ° C.). No minute bending occurs on the glass surface.

The cooling step of the cooling furnace is a step of rapidly cooling the glass heated by the heating step into the cooling furnace and dehumidifying the cooling compressed air.

As shown in FIG. 4, the cooling path of the cooling process includes an air cooling chamber 201, a compression compressor 202, a dehumidifier 203, and a cooling compressed air chamber 204. And the connection pipes 205 are connected to each other, and the air cooled in the air cooling chamber 201 is dehumidified and compressed and cooled by the compression compressor 202 and the dehumidifier 203 and the cooling compressed air chamber. Cooling compressed air introduced into 204 and introduced into the cooling compressed air chamber 204 flows into the cooling furnace 200 through the connecting pipes 205, and the plate glass heated by the heating furnace 100 rapidly. Cooling is performed to heat treatment.

As such, the internal temperature of the heating furnace 100, that is, the convection heat temperature for indirectly heating the glass is formed within the range of 500 ° C. to 600 ° C. below 650 ° C., which is the softening point of the glass, and the glass is indirectly heated by the convection heat. In addition, since the heated glass is rapidly cooled by the cooling compressed air dehumidified inside the cooling furnace 200, wave phenomenon does not occur on the surface of the glass, so that the smoothness of the surface of the glass may be improved and high strength. Due to the strength of impact resistance, safety accidents, such as soybeans, are crushed finely during crushing and injure the human body.

The manufacturing process is a process of applying a reflective film to one surface of the glass which has been heat-treated and cooled by the heating process and the cooling process, applying a coating layer to the surface of the reflective film, and applying a protective film to the back surface of the glass, followed by drying.

The reflecting film coated on one surface of the glass by the process of manufacturing can use a melt of various materials such as nickel, silver, chromium, aluminum, etc., and the coating method is spraying by an injector or painting and vacuum sputtering. It can apply | coat by various methods, such as a method of sputtering.

In addition, the protective film formed on the back surface of the glass in the manufacturing process, may be made of various materials such as urethane or silicone resin.

In the process proceeded by the method of manufacturing the reinforced safety mirror of the present invention, the plate glass processing process, which is a preliminary process, and the making process process, which is a post process, are generally performed, and the manufacturing method of the reinforced safety mirror of the present invention is the heating process of the present process. The reinforcement safety mirror is manufactured by a heat treatment process by a furnace heating process and a cooling furnace cooling process.

Therefore, the surface smoothness of the glass is maintained by indirect heating by convective heat of 500 ° C. to 600 ° C. which is a temperature of 650 ° C. or lower, which is the softening point of the glass in the furnace, and rapid cooling by dehumidified cooling compressed air in the cooling furnace, The image of the mirror can be obtained by the impact strength, and not only to prevent the loss that is easily broken when handling the mirror, but also to prevent the safety accidents that cause injury to the human body because it is crushed into small grains such as soybeans. Can be.

In describing the manufacturing method of the reinforced safety mirror of the present invention, the plate glass processing process for processing plate glass was described as a preliminary process as a post process, but the present invention is not limited thereto. You may work on the plate glass processing process as a post process.

The method of manufacturing the reinforced safety mirror of the present invention is capable of various modifications in addition to those shown and described, unless the deviation from the object of the present invention, all embodiments to be modified should be included in the scope of the present invention.

In the method of manufacturing the reinforced safety mirror of the present invention having the above characteristics, the process of strengthening by heat treatment of the processed glass is heated by indirect heating by convection heat instead of direct heating, the softening point of the glass In addition to heating the glass within the range of 500 ° C. to 600 ° C., which is a temperature of 650 ° C. or lower, the glass is formed in a wave shape on the glass surface by rapidly cooling the heated glass by introducing it into a cooling furnace. This prevents unevenness and improves the smoothness of the glass to obtain a clear mirror image, and also prevents the risk of injuries to sharp and large fragments of ordinary mirrors, even if the mirror is crushed into fine pieces. The effect that can be expected is expected.

Claims (3)

A plate glass processing process for cutting, processing, washing and drying the plate glass to a certain size; A heating step of introducing the glass processed by the plate glass processing step into the heating furnace 100 to indirectly heat the heat by convection heat at a temperature of 500 ° C. to 600 ° C. which is below the softening point of the glass (650 ° C.); A cooling step of introducing the glass heated by the heating step into the cooling furnace 200 and rapidly cooling the compressed and dehumidified cooling compressed air of the cooling furnace 200; It characterized in that it comprises a coating process for applying a reflective film on one surface of the glass strengthened by the heating process and the cooling process, a coating layer on the surface of the reflective film, and applying a protective film on the back surface of the glass and drying it. Method of manufacturing reinforced safety mirrors. The convection heat in the heating step of claim 1, The combustion heat generated in the combustion chamber 102 is riding on a plurality of transfer paths 103 connected to the upper side of the heating furnace 100 by the rotation of the fan 101 provided on the upper side of the heating furnace 100. Method of producing a reinforced safety mirror, characterized in that formed by allowing the inside of the heating furnace 100 to be introduced. The method according to claim 1 or 2, wherein the cooling step, The cooling furnace in which the compressed cooling air cooled by an air cooler and compressed and dehumidified by the compression compressor 202 and the dehumidifier 203 is introduced into the glass heated by the heating process through a plurality of connecting pipes 205. Method of producing a reinforced safety mirror, characterized in that carried out by being introduced to (200).

Images