KR100336089B1 - The methods of a ceramics door with vitreous enameling - Google Patents

Abstract

PURPOSE: A method for manufacturing a ceramics door with vitreous enameling which maintains application convenience and long service life by obtaining aesthetic and physical property improving effects and reduces costs required in the processes by substantially reducing contract manufacturing processes required in fabrication of the door is provided. CONSTITUTION: The method for manufacturing a ceramics door with vitreous enameling comprises first process of fabricating a door in which space part having a certain width is formed by welding the iron board on the upper or lower part of one side of which an injection hole is formed to each bending surface of the bent iron board after bending each circumferential part thereof to one side as forming certain patterns and shapes on the surface of the iron board by plastic working an iron board having certain specification and area; second process of forming an inorganic enamel layer on the surface of the iron board by baking the first glaze coated iron board at a temperature of 750 to 850 deg.C for 5 to 10 minutes and air cooling the baked first glaze coated iron board after drying and preheating the first glaze coated iron board for a certain period of time by injecting the iron board of the door on the surface of which first commercial glaze is coated into a caterpillar type horizontal electric furnace; third process of forming a body color enamel layer on the outer surface of the enamel layer by baking the second glaze coated iron board at a temperature of 750 to 850 deg.C for 5 to 10 minutes and air cooling the baked second glaze coated iron board after drying and preheating the second glaze coated iron board for a certain period of time by injecting the iron board of the door on the surface of which second commercial glaze is coated on the enamel layer formed in the second process into the caterpillar type horizontal electric furnace; fourth process of making the surface of the door into ceramic ware by forming a luster layer on the outer surface of the body color enamel layer after baking the third glaze coated iron board at a temperature of 600 to 850 deg.C for 5 to 10 minutes and air cooling the baked third glaze coated iron board after drying and preheating the third glaze coated iron board for a certain period of time by injecting the iron board of the door on the surface of which third glaze of organic luster is coated on the body color enamel layer formed in the third process into the caterpillar type horizontal electric furnace; and finishing the fabricated door after packing insulating materials with soundproofing and heat reserving functions into the door through the injection hole of the iron board by moving an enamel door obtained in the fourth process to the next process.

Description

METHODS OF A CERAMICS DOOR WITH VITREOUS ENAMELING

The present invention relates to a method for manufacturing an enameled ceramic door, and more specifically, to process a steel plate to have a certain standard and shape according to the use of various doors, including fire doors, interior doors, furniture doors, refrigerators, doors of home appliances, etc. The ceramic enamel is applied to the surface, and the enameling process of firing at a certain temperature is repeated several times, and then the surface of the iron plate door is ceramicized while the transfer and firing processes are sequentially performed. Providing a method of manufacturing enameled ceramic doors by filling fillers such as urethane, fiberglass, clay and heat-insulated mortar according to the use of the product in the formed space, to achieve aesthetically improved effects such as commerciality, artistry, fire resistance, It is equipped with the effects of heat resistance and robustness, sound insulation and warmth, so that it can maintain the convenience of use and the life of the machine for a long time. In addition, the present invention relates to a method of manufacturing an enameled ceramic door which can be widely distributed at a low price by greatly improving workability and productivity while significantly reducing the processing cost required for door manufacturing.

In general, doors are divided into fire doors, doors for furniture, doors for furniture, and doors for home appliances according to their functions, shapes, and uses.

In these various doors, first, a brief description will be made of the manufacturing process for the furniture doors and their usage.

The furniture door is hinged to one side of the front of the body constituting the various furniture is configured to open and close to one side.

In addition, the furniture door is a very important part that determines the merchandise and artistry as the outer surface of the door due to the use characteristics of the furniture, such as closet, quilt cabinet, etc. Therefore, the time and labor of the door processing in the production of furniture is the most important It's a part of that.

Most of the above furniture doors are made of expensive wood because it can be easily harmonized with the solidity of the wood and its own pattern and other decorations arranged in the same space.

However, the above-mentioned conventional furniture doors have no other materials to replace expensive wood, so the cost and expense of purchasing materials are increasing. In particular, the supply and demand of domestic materials is difficult, and most of them depend on imports.

In recent years, the global trend of preventing and preventing global environmental pollution is associated with the prevention of logging of trees, which make up most of the oxygen production, leading to the depletion of wood. The increase in prices and the purchase price of furniture has been greatly increasing.

The problem with the conventional furniture door is not only this, but also in the manufacturing process, the number of airborne and the coating applied to the surface mostly consists of petrochemical products, causing environmental pollution problems, especially formalin and other paints cause harmful odors In case of workers exposed to this substance as a substance, it is inevitable to penetrate into the human body through the respiratory system due to the nature of the work, causing health problems such as headache, and worsening the work environment and reducing workability and productivity. Along with the inclusion of the problem, it is causing environmental pollution and air pollution.

In addition, the conventional furniture doors take the surface decoration in the form of creating a decorative beauty using the unique texture of the wood or by adding other decorations made of wood on the surface, which is limited in expression using a monotonous wood grain. If the decorative effect is not used and special processing is aimed at the artistry and the merchandise, the processing cost will be greatly increased, which will eventually increase the purchase price of furniture.

These furniture doors are also made of petrochemicals, as the material is made of wood and the surface is coated with petrochemical products, so they have no fire resistance. It is also a cause of death and damage to human beings.

On the other hand, when looking at the structure and characteristics of the fire door as described above, the inner and outer surface is composed of a steel plate having a certain thickness, the middle space portion is filled with glass fiber, etc., having a certain soundproofing function in case of fire and flame in case of fire It is configured to block.

The inner and outer surface of the iron plate of the fire door is painted using a paint such as general paint to prevent corrosion and beautiful appearance.

However, the paint that is painted on the fire door is weak to heat and generates toxic gas in case of fire, and in particular, the paint has a limitation, and the beauty of the appearance cannot be obtained, and the trouble of having to repaint the exterior after a certain period of use. And closures.

In this regard, the door of the interior is usually composed of wood or plywood, which is difficult to supply expensive wood and the paint painted on the surface is made of petrochemical products, as in the above-described furniture doors, it is excellent in ignition Compared with fire doors, there is no fire and heat shielding ability, which can lead to large casualties in the event of fire.

In addition, the indoor door is provided with a honeycomb having a soundproofing function between the space of the inner and outer plywood, and has a light weight advantage, but this is a noise blocking effect is only a marginal gap, but not only a gap between the maintenance aids, The decorative effect of the outer surface for the artistry is nothing or a little.

In addition, the doors for home appliances such as refrigerators are provided with a coating layer made of synthetic resin on the surface thereof, and thus there is a closed end of generating toxic gas in case of fire.

The present invention has been researched and created in order to fundamentally solve various problems of the conventional doors as described above, and the object of providing the same is excellent in fire resistance, durability, sound insulation, heat insulation, surface while realizing high strength and light weight. It is to provide a variety of doors of a new type that can express the smoothness and beautiful and diverse colors and patterns on its surface.

Another object of the present invention is to fundamentally solve the problem caused by the material closure of the conventional wooden door and to take the organic transfer and Shanghai Shanghai transfer process on the surface of the inorganic enamel layer to ceramicize the surface of the iron plate door at the same time It is to maximize the merchandise and artistry by producing various colors, patterns and shapes on the surface of the door while fully satisfying the texture.

Another object of the present invention is to form a variety of patterns by processing the sheet metal with excellent formability and to have a enamel layer calcined at a high temperature on the surface, thereby maximizing and diversifying the aesthetic decoration of the surface for commerciality and artistry In the event of fire, there is no fear of ignition, and in particular, it does not damage the surface of the door so that it can be used again, so that the service life of the enameled ceramic door having various aesthetic decoration can be maintained for a long time.

It is another object of the present invention to provide a method for manufacturing an enameled ceramic door in which a filler having a thermal insulation is filled in the door to double the flame and heat shielding effect to improve the safety of the user.

1 is a manufacturing process showing a manufacturing process of the present invention,

2 is a cross-sectional view of an enameled ceramic door obtained by the present invention;

<Explanation of symbols for main parts of the drawings>

1: door 1 ': iron plate

2: injection hole 3: filling material

4: enamel layer 5: body color enamel layer

6: rasta layer 7: transfer layer

In order to achieve the above object, the present invention provides a method for manufacturing the enameled ceramic door as follows.

First, the steel plate having a predetermined size and area is plastically processed to form a pattern or shape of a predetermined shape on the surface in an intaglio or embossed shape, and each peripheral portion is bent to one side, and each bending surface of the bent iron plate is one upper or lower side. A first process which is a door manufacturing process in which a space part having a predetermined width is formed inside by welding an iron plate formed with a penetration hole formed therein;

The first commercial glaze was applied to the iron plate surface of the door obtained by the first step, and then charged, dried and preheated in a caterpillar horizontal electric furnace for a predetermined time, and then fired and fused for 5 to 10 minutes at a temperature of 750 to 850 ° C. A second step of forming an inorganic enamel layer on the surface of the iron plate by air cooling for a predetermined time;

After applying a commercially available secondary glaze representing various body colors on the surface of the enamel layer formed by the second process, and put into a caterpillar horizontal electric furnace, drying and preheating for a predetermined time, 5 at a temperature of 750 ~ 850 ℃ A third step of forming a body color enamel layer on the outer surface of the enamel layer by firing and fusion for 10 minutes and air-cooling for a predetermined time;

Organic rasta, which is a tertiary glaze, is applied to the surface of the body color enamel layer formed by the third process, and charged, dried and preheated in a caterpillar horizontal electric furnace for a predetermined time, and then at a temperature of 600 to 850 ° C. A fourth step of ceramicizing the surface of the door by firing and fusion for 10 minutes and air-cooling for a predetermined time to form a raster layer on the outer surface of the body color enamel layer;

A process of moving the enamel door obtained by the fourth process to fill and finish the filler having the functions of heat insulation, sound insulation, and heat insulation in the interior of the door through the injection hole of the steel plate on the back of the door formed by the first process. Provided is a method of manufacturing an enameled ceramic door in which a manufacturing process is performed sequentially.

At this time, the first commercial glaze applied to the surface of the iron plate in the second and third processes and the second commercial glaze representing the body color are applied according to each process, and then preheated for a predetermined time by putting it in a crawler type horizontal electric furnace. After taking it, it is calcined and fused for 5 to 10 minutes.

At this time, when the firing temperature is below 750 ℃, the fusion effect of the glaze decreases and heterogeneous phenomena occur with the steel plate.In addition, when the firing temperature is 850 ℃ or higher, the fusion effect of the glaze is slightly increased, but the steel sheet approaches the melting point. There was a risk of deformation, it was found that the problem occurs in the end smoothness.

Preferably, when the firing temperature of the electric furnace was maintained at about 830 ℃, it was found that the fusion effect of the glaze is excellent without fear of deformation of the iron plate.

In addition, the firing temperature in the step of forming the raster layer on the outer surface of the body color enamel layer and ceramics the surface of the door by the fourth step is slightly lower than the firing temperature in the second and third steps. It is desirable to keep

When the first and second glazes are applied and fired on the surface of the door, the organic raster, which is the third glaze, is applied, and when heated and baked at the same temperature as in the second and third processes, shrinkage of each coating layer, This is because the organic rasta cracks on the surface calcined by the swelling action or, in severe cases, the surface may be damaged.

Therefore, it is preferable to keep the firing temperature of the organic raster layer in the fourth process within a temperature range that is slightly lower than the firing temperatures in the second and third processes. Since the fusion effect of the pigment is poor, the defect rate is high, and when the temperature is 850 ° C. or more, the pigment burns.

Preferably, it was found that the surface of the door was very excellent and satisfactorily ceramics when fired at a temperature of about 800 ° C.

In addition, the surface of the raster layer formed by the fourth process is subjected to a transfer treatment by the all-coating or partial coating method of a predetermined shape, if necessary, baked for 5 to 10 minutes at a temperature of 600 ~ 800 ℃, and then cooled You can get the design you want

In order to express wood texture to obtain wood texture on the surface of the door, after the transfer treatment by the all-coating method, the plastic treatment is applied to the surface of the transfer paper. Agglomerated on the surface, the texture of the wood can be expressed excellently and satisfactorily.

In addition, in the case of expressing various colors, various patterns and shapes on the surface of the door partially, the transfer process is performed by the partial coating method and then fired.

At this time, the firing temperature is also preferably maintained at the same or lower than the firing temperature in the fourth process of the present invention. When the firing temperature at this time is less than 600 ° C, the transfer coating is less than the melting point of the pigment constituting the transfer paper. If this is not the case or the failure rate is high, it can be seen that there is a risk that the transfer layer is burned when the 850 ℃ or more.

Preferably, when fired at a temperature of about 780 ° C., there is almost no defect rate, no burning action of the transfer layer, and excellent and satisfactory surface wood texture.

In manufacturing the enameled ceramic door of the present invention, the inorganic glaze and the organic raster which are sequentially applied and fired in the second to fourth processes are coated with an appropriate amount by an automatic applicator or an electrostatic coating method. The door coated with glaze in the process is put into the heat input part of a constant-length horizontal orbital electric furnace composed of heat input part, firing part and cooling part, and drying and preheating action by conduction heat conducted from the firing part gradually from normal room temperature. 60 to 80 minutes at elevated temperature,

After passing through the calcining section for 5 to 10 minutes to melt the glaze on the surface of the iron plate, passing the cooling section by air cooling for 15 to 30 minutes and enamel layer, body color enamel layer and rasta layer respectively on the surface of the iron plate. Fusion and formation.

The length of the heat input part of the electric furnace used at this time is 18-22 m, the length of a calcination part is 4-6 m, and the length of a cooling part is 9-12 m.

In addition, the caterpillar-type horizontal electric furnace is even in temperature distribution compared to the vertical furnace, it is possible to achieve a continuous firing process is advantageous in the workability and productivity.

The preheating time in the kiln is to remove the sense of heterogeneity by gradually preheating because the coefficient of thermal expansion for each surface layer of the door surface is different, the preheating effect is lowered when the preheating time is 60 minutes or less, the more the preheating time is better, but 80 minutes It turned out that manufacturing cost rises when it becomes abnormal.

Preferably, when the preheating time of 70 to 80 minutes is maintained, the preheating effect is excellent, the plasticity is excellent, and the manufacturing cost is also economical.

In addition, if the firing time in the firing process is 5 minutes or less, there is a risk that the glaze melts and aggregates insufficiently, resulting in defects in the design of the fusion properties, and in the case of 10 minutes or more, the fused glaze may be burned. Could know.

Preferably, when the above firing time is maintained within 7 minutes, it was found that the design expressed on the surface is excellent and the smoothness of the surface of the steel sheet is not a problem with the desired fusion effect.

In addition, when the fired door is cooled by air cooling, the cooling unit, which maintains 9 to 12 m, is allowed to pass slowly over 15 to 30 minutes. This is because there is a risk of breakage, and if the passing time is less than 15 minutes, the passing time is faster, and there is a risk of surface damage.

Preferably it was found that the slow cooling by passing through the air for about 25 minutes or so without economic damage to the product.

On the other hand, the rasta in the fourth process of forming a raster layer is capable of improving the merchandise and artistry by producing a variety of beautiful colors while having transparency,

This is because the glaze is melted according to the firing temperature in the firing process to produce a color in the process of agglomeration with each other, so that various shapes and various patterns are expressed according to the visual angle to maximize the beautiful aesthetic decoration effect of the door surface.

Among the rastas, when using organic glazes having various colors such as rainbow pearl (site term), the aesthetic effect is doubled.

After the enameling process for the outer surface of the iron plate door through the above several firing process, the process is moved as in the component part of the present invention, and each of the insulation, soundproofing, and thermal insulation filler is manufactured inside the door through the injection hole. The filling is completed according to the characteristics of the door.

In this case, the filling material is filled with foamed urethane to achieve sound insulation and heat insulation. When filling the fire door, 80w% of insulation material such as asbestos, rock wool and glass fiber and 20w% of urethane are filled. By preparing a mixed heat insulating filler and injecting it through the injection hole of the iron plate formed by the first process to be cured after a certain time, or by preparing a filler mixed 90w% of clay on the gel and 10w% of the curable chemical bond It can also be configured to be injected through the injection hole, it can be cured quickly.

Such fillers can be variably filled according to the use of the door and the size and characteristics of the product, which is not limited.

According to the present invention, while solving the problems caused by the material closure of the conventional wooden door, it is excellent in fire resistance, durability, sound insulation, heat insulation, high strength and light weight, and at the same time, the surface smoothness and the surface are beautiful and diverse. It is possible to express colors and patterns, and in particular, by providing a new type of ceramic enameled ceramic door that ceramics the surface of the iron plate door by taking Shanghai raster transfer process for organic raster and ceramics on the surface of the inorganic enamel layer. It is obvious that this invention is a very advantageous invention that can maximize the merchandise and artistry, and have several useful effects at the same time, such as improvement of workability and productivity, improvement of working environment, and replacement of expensive wood.

Finally, the present invention has been described with the manufacturing method of the enameled ceramic door, but this is only an example for expressing the technical idea of the present invention, not limited thereto, and plastic processing of the iron plate to the surface of the inorganic And by applying and firing an organic glaze in sequence to form an enamel layer to ceramic the surface of the iron plate, ie, interior and exterior plates for building, guide plates for fixed structures, exterior bodies of various home appliances, bodies of gas ranges, It can be easily applied to the manufacturing method of various enamel products for enameling products and special containers requiring special design, and if the manufacturing method of these various enamel products falls within the scope of the technical idea pursued by the present invention It should be noted that it is not possible to deviate from the scope of the technical claims of the present invention described below.

Claims (2)

The plastic sheet having a predetermined size and area is plastically processed to form a pattern or shape of a predetermined shape on the surface in an intaglio or embossed form, and each peripheral portion is bent to one side, and each bent surface of the bent iron sheet is injected into one upper part or the lower part. A first process which is a door manufacturing process in which a space part having a predetermined width is formed inside by welding a steel plate through which a ball is formed; The first commercial glaze was applied to the iron plate surface of the door obtained by the first step, and then charged, dried and preheated in a caterpillar horizontal electric furnace for a predetermined time, and then fired and fused for 5 to 10 minutes at a temperature of 750 to 850 ° C. A second step of forming an inorganic enamel layer on the surface of the iron plate by air cooling for a predetermined time; After applying a secondary commercial glaze representing various body colors on the surface of the enamel layer formed by the second process, and put into a caterpillar horizontal electric furnace, drying and preheating for a predetermined time, 5 at a temperature of 750 ~ 850 ℃ A third step of forming a body color enamel layer on the outer surface of the enamel layer by firing and fusion for 10 minutes and air-cooling for a predetermined time; Organic rasta, which is a tertiary glaze, is applied to the surface of the body color enamel layer formed by the third process, and charged, dried and preheated in a caterpillar horizontal electric furnace for a predetermined time, and then at a temperature of 600 to 850 ° C. A fourth step of ceramicizing the surface of the door by firing and fusion for 10 minutes and air-cooling for a predetermined time to form a raster layer on the outer surface of the body color enamel layer; A process of moving the enamel door obtained by the fourth process to fill and finish the filler having the functions of heat insulation, sound insulation, and heat insulation in the interior of the door through the injection hole of the steel plate on the back of the door formed by the first process. Method for producing an enameled ceramic door, characterized in that the manufacturing process is made sequentially. The method according to claim 1, The surface of the raster layer formed by the fourth process includes a step of performing a transfer treatment by the all-coating or partial coating method of a predetermined shape design and firing for 5 to 10 minutes at a temperature of 600 to 800 ℃, followed by cooling Method for producing an enameled ceramic door, characterized in that.