KR20080039591A - Heat-proof ceramic tableware and method thereof - Google Patents

Abstract

A heat resistant ceramic tableware and a manufacturing method thereof are provided to prevent food from being attached to the bottom or the inner wall of the ceramic tableware by coating PTFE on the partial or entire surface of the ceramic tableware. A heat resistant ceramic tableware comprises a PTFE(Poly Tetra Fluoro Ethylene) layer coated on the surface of a cooking container(10), and an induction thermal transfer film layer(9) formed at the bottom of the outer surface in the cooking container. The PTFE layer is coated on portions of the surface in the cooking container. The PTFE coating process is formed by spraying the PTFE coating liquid with the thickness of 10 to 15 micron at a primer stage, and at the thickness of 15 to 20 micron at middle/upper stages. The surface coated by the PTFE is sprayed by the marble PTFE.

Description

Heat-resistant ceramic cooking vessel and its manufacturing method {HEAT-PROOF CERAMIC TABLEWARE AND METHOD THEREOF}

1 is a cross-sectional view of a cooking vessel made of heat-resistant ceramics according to an embodiment of the present invention,

2 is a cross-sectional view of a cooking vessel made of heat-resistant ceramics according to another embodiment of the present invention;

3 is a cross-sectional view of a cooking vessel made of heat-resistant ceramics according to another embodiment of the present invention;

4 is a block diagram illustrating a manufacturing process of a cooking vessel made of heat-resistant ceramics according to an embodiment of the present invention.

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

5: heat resistant ceramics, 6: fluororesin layer

9: induction thermal transfer film layer, 10: cooking vessel

The present invention relates to a cooking vessel made of heat-resistant porcelain, and more particularly, to a cooking vessel made of heat-resistant porcelain coated with fluorine resin (PTFE: Poly Tetra Fluoro Ethylene) and usable in an induction range, and a method of manufacturing the same.

As a raw material of the heat-resistant ceramics in general, a mixture of kaolin, clay, acid blue soil, and ferrite inorganic material is used, and it is fired at a high temperature of 1150 ° C to 1300 ° C in a kiln to manufacture heat-resistant ceramics.

Common low-temperature fired earthenware or pottery cooking containers that have been used up to now have a water absorption rate, which is very unsanitary when heated or stored for a long time, as well as cadmium (Cd) and lead (Pb) and There are problems, such as the case of the leaching of harmful heavy metals, but the heat-resistant ceramics usually do not have a water absorption rate, the situation is produced by completely burning the elution of heavy metals at a high temperature firing of 1250 ℃ or more.

On the other hand, when cooking by heating foods with insufficient moisture in heat-resistant direct ceramics or heating them in a microwave oven, food or contents will stick to the bottom or inner wall of the ceramics and cause waste of food or contents. In addition to the problems of washing, there was a difficulty in washing.

Induction range, which has recently been used as a kitchen heater, generates a magnetic force in the coil when a current is sent to the heating induction coil inside the top plate, and when the magnetic force passes through the bottom of the bowl placed on the top of the range, The eddy current is generated by the resistance component (iron component) included in the material, and the eddy current generated from the bottom of the bowl generates only the bowl itself, so the bowl is heated without heating the top of the range. For example, heating stops immediately, and it is safe to touch the top of the range with your hands, so energy is generated only in the part where the pot touches.

Since the induction range does not generate a flame, there is no danger of fire, and since it does not burn fuel such as gas, there is no generation of combustion gas including carbon monoxide, so it is harmless to the human body. In addition, there is no consumption of indoor oxygen can maintain a comfortable room, in particular, it is a kitchen heater that can be used very safely because it does not burn the touch of the induction range grill in the middle of heating the container in response to metal only.

However, the induction range has a problem that the use of ceramics, that is, ceramic cooking vessels corresponding to non-magnetic and non-metals is impossible.

Therefore, the present invention has been made to solve such a fundamental problem of the prior art, an object of the present invention to provide a cooking vessel made of heat-resistant ceramics.

Another object of the present invention is to apply a fluororesin coating to a part or the entire surface of the heat-resistant porcelain, to prevent food from sticking to the bottom or the inner wall of the porcelain during cooking.

Still another object of the present invention is to provide a cooking vessel made of heat-resistant ceramics that can be used in an induction range.

According to one aspect of the invention, there is provided a cooking vessel made of heat-resistant porcelain made of porcelain as a raw material, the surface of the cooking vessel is coated with a fluorine resin layer, the outer surface bottom of the cooking vessel induction thermal transfer film layer It is characterized by being formed.

Preferably, the fluorine resin layer is characterized in that it is coated only on a portion of the surface of the cooking vessel.

According to still another aspect of the present invention, there is provided a method of manufacturing a cooking vessel made of heat-resistant porcelain using porcelain as a raw material, the method comprising: a holding process for producing a heat-resistant porcelain, a vacuum refining process, a forming and shaping process, a roasting process It is characterized in that it comprises a chemical process, oiling process, the main firing process, fluorine resin layer coating process, induction thermal transfer film layer compression process.

Preferably, the first roasting is characterized in that it is carried out at a temperature of 920 ℃.

Preferably, the glaze is characterized by having a composition ratio of 1% bio, 45% ferrite, 5% talc, 40% silica and 9% limestone.

Preferably, the main firing process is characterized in that it is carried out at a temperature of 1300 ℃.

Preferably, the fluorine resin layer coating process is characterized in that the sanding treatment for spraying gold steel as a pretreatment process is included.

Preferably, in the fluorine resin layer coating process, the fluororesin is formed by spraying a fluororesin to a thickness of 10 to 15 microns in a primer step and a thickness of 15 to 20 microns in a medium / top coat step, respectively.

Preferably, after the primer step is characterized in that the drying process is continued at a temperature of 200 ℃ to 250 ℃.

Preferably, after the middle / top step, the drying and baking process is continued for 7 to 10 minutes at a temperature of 420 ℃ to 430 ℃.

Preferably, the induction thermal transfer film layer is characterized in that the process of heating and baking for 120 to 150 minutes at a temperature of 780 ℃ after compression is followed.

Preferably, the surface of the fluororesin layer is coated with a marble fluorine resin is spray-coated.

(Example)

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It is to be understood that such embodiments are intended to facilitate the description of the invention and are not intended to limit the invention to these embodiments.

1 is a cross-sectional view of a cooking vessel made of heat-resistant ceramics according to an embodiment of the present invention.

As can be seen in the drawings, the cooking vessel 10 according to the present invention is a part of the heat-resistant ceramics (5), that is, coating the fluorine resin layer (6) inside the food or the like in the heat-resistant ceramics (5), heat-resistant ceramics The induction thermal transfer film layer 9 was attached to the outer bottom of (5).

As described above, the cooking vessel 10 of the heat-resistant ceramics 5 according to the present invention does not stick to the floor when cooking and heating food or the like in a microwave oven or by microwave coating with fluorine resin, and induction By using the thermal transfer film layer can be used in the induction range.

2 is a cross-sectional view of a cooking vessel made of heat-resistant ceramics according to another embodiment of the present invention.

As can be seen in the drawings, the cooking vessel 10 according to the present invention is coated with a fluorine resin layer 6 on the entire outer surface of the heat-resistant ceramics (5), the induction thermal transfer film layer on the outer bottom of the heat-resistant ceramics (5) ( 9) was attached.

The cooking vessel 10 of the heat-resistant ceramics 5 according to the other embodiment also does not stick to the floor when cooking and heating food for cooking or heating in a microwave oven by fluorine resin coating, induction thermal transfer film By using the layer 9, it can be used even in the induction range.

3 is a cross-sectional view of a cooking vessel made of heat-resistant ceramics according to another embodiment of the present invention.

As can be seen in Figure 3, in accordance with the shape and shape according to the purpose of use of the cooking vessel 10 according to the present invention selectively coated the fluorine resin layer 6 on the entire inner or outer surface of the heat-resistant ceramics (5) Then, the induction thermal transfer film layer 9 may be attached from the edge except the center of the outer bottom surface of the heat resistant porcelain 5 to the side, and the outer bottom surface and the side of the heat resistant porcelain 5 together. The induction thermal transfer film layer 9 may be continuously attached.

A method of manufacturing a cooking vessel of heat-resistant porcelain according to the present invention configured as described above will be described with reference to FIG. 4.

4 is a block diagram illustrating a manufacturing process of a cooking vessel made of heat-resistant ceramics according to an embodiment of the present invention.

First, go through a holding process for manufacturing a heat-resistant pottery (S110).

Body (body) is composed of the main body in ceramics, the composition of the general body is made of raw materials of three components, such as aggregate, plasticizer, flux.

In the holding process is to make the possession, they are collected, ground and blended.

Subsequently, the vacuum drill process is continued (S120).

The above-mentioned refining is a step of kneading the sojito made to evenly distribute the moisture, and at the same time to remove the air bubbles and to reduce the accident during molding and heating.

The dehydrated sojito is kneaded again using a vacuum grinder and the air mixed in the sojito is removed and then stored for a certain period of time.

The general training process is as follows.

First, the cake aged for three days is transported in front of the vacuum grinder. And the extrusion bracket of a vacuum refining machine is attached according to a molding specification.

Subsequently, start the refining machine, operate the vacuum pump, check the vibration level, wait for 760 mm Hg, and then insert the cake.

In addition, in the early days, check the vacuum state, the presence of S cracks in the cross section, the plasticity state, and the water content (measured by NGK hardness tester).

Finally, if the condition of the polished soil is in good condition, extruding is started, cut to a certain length and stored in a truck.

As a next process, a molding and shaping process is continued (S130).

The molding is to make a form of porcelain, work by hand, using a rotating force (Jiggering), the injection molding (Casting) made by pouring soil water into a plaster mold, pressing by using mechanical force, or sputum rice cake It can be molded by the method such as Plastic Forming of Extruding.

If the molding process is soiled, the shaping process can be defined as trimming and decorating.

In the shaping process, a shape is made in ceramics, dried in half shades, and dried properly, and then smoothed as a whole by making an upper portion or a heel.

Pottery that has undergone the orthopedic process enters the first roast (S140).

Apply glaze to ceramics and bake them at 800 to 920 ℃ with the ceramic completely dry.

In the present invention, the first baking was preferably performed by raising the temperature to 920 ° C.

Next is followed by a chemical process (S150).

The painting process is to draw a variety of paintings on the pottery that was the first bulb, the material is a variety of fire-resistant materials such as iron, copper, cobalt to express a variety of colors.

The process that follows is a see-through process (S160).

The see-through process is a process of applying glaze to porcelain which has become a prime ball, and the material generally mixes feldspar, pottery stone, limestone, various kinds of ash and the like to coat the porcelain. Glaze materials vary in color and are mostly transparent.

In the present invention, it is possible to include silver nano, titanium oxide, sterile and antimicrobial ceramic components in the glaze. For example, the composition of the glaze may be a composition of 1% bio, 45% ferrite, 5% talc, 40% silica (SiO ₂ ), 9% limestone.

This firing process is followed (S170).

The main firing is a chaebol roast, depending on the material of the glaze, but usually raise the temperature from 1250 ℃ to 1300 ℃ and fired for about 8 to 10 hours, the finished product of ceramics will come out.

There is a fire oxide and a reducing fire, and the fire oxide is usually red or yellow because it burns the fire while oxygen is put in. The reducing fire is lit in blue or white because it burns the kiln after blocking the oxygen.

In the present firing process of the present invention, the temperature is raised to 1300 ° C.

Subsequently, the fluororesin layer coating process is continued (S180).

The fluororesin layer 7 may be coated on part or all of the surface of the porcelain. In the case where a part is coated, the fluorine resin layer is coated only inside the cooking vessel in which food and the like are contained as illustrated and described in FIG. 1.

On the other hand, when the whole is coated, as shown and described in Figure 2, refers to the case where the fluororesin layer is coated on the entire surface of the cooking vessel.

In order to increase the adhesive force of the fluororesin layer 7, sanding treatment is performed on the inner surface or the entire surface of the porcelain which has completed the present firing process before coating.

At this time, by spraying the geumgangsa having a diameter of about 0.6mm to form irregularities on the surface of the ceramic. This is to maximize the contact area of the fluorine resin layer when the fluorine resin layer is formed later. Sanding is followed by air cleaning.

When coating the fluororesin layer may be carried out through three steps of primer coating, intermediate and top coat.

First, the primer step is coated by spraying a fluororesin to a thickness of 10 to 15 microns. Thereafter, it is dried at a temperature of about 200 ℃ to 250 ℃.

Spray coating is carried out to a certain thickness even in the medium / upper stages, drying and firing process. At this time, the temperature of the porcelain coated fluorine resin is put up to 420 ℃ to 430 ℃ and dried and calcined in a drying furnace for about 20 to 25 minutes in this state.

After the main baking is completed, the induction thermal transfer film layer 9 is pressed and attached (S190).

As can be seen in Figures 1 and 2, the induction thermal transfer film layer 9 is formed on the outer bottom of the porcelain, the thermal transfer film is pressed and then heated and calcined to about 780 ℃ for about 120 to 150 minutes .

In addition, the marble fluorine resin spray coating process may optionally be further performed. This step is to form a fluorine resin protrusion (not shown) on the surface by randomly spraying the fluorine resin on the inner surface of the cooking vessel coated with the fluorine resin, and is intended to improve the durability, strength and wear resistance of the fluorine resin.

Thus, when the cooking vessel made of heat-resistant ceramics coated with the fluorine resin according to the present invention can be used in the induction range is packaged and shipped as a finished product.

Therefore, various heat-resistant ceramics, such as various shapes, shapes, sizes, etc. according to the purpose and purpose of use are coated with a fluorine resin layer according to the present invention and can be used in an induction range, as well as for use in direct cooking and microwave ovens. It is noted that it can be actively adopted and used in heat resistant ceramic products.

Thus, by using a cooking vessel made of a heat-resistant porcelain coated with a fluororesin layer and usable in an induction range, it is possible to obtain a unique high-quality cooking that can be expected only in a porcelain cooking vessel when cooking food. In addition, food and the like can be prevented from sticking to the bottom of the container even during cooking and heating.

In addition, due to the induction thermal transfer film layer pressed on the bottom of the cooking vessel, it can be used in the induction range.

The present invention has been shown and described with reference to certain preferred embodiments, but the present invention is not limited to the above-described embodiments and has ordinary skill in the art to which the present invention pertains without departing from the spirit of the present invention. It is noted that various changes and modifications may be made by the user.

Claims (12)

In the cooking vessel made of heat-resistant porcelain made of porcelain as a raw material, Fluorine resin layer is coated on the surface of the cooking vessel, the cooking vessel made of heat-resistant porcelain formed by forming an induction thermal transfer film layer on the bottom of the outer surface of the cooking vessel. The method of claim 1, The fluorine resin layer is a cooking vessel made of heat-resistant ceramics, characterized in that the coating on only part of the surface of the cooking vessel. In the manufacturing method of a cooking vessel made of heat-resistant porcelain made of porcelain as a raw material, Holding process for manufacturing heat resistant ceramics, Vacuum refining process, Forming and shaping process, Roasting Process, Chemical process, Seeyu Process, Pattern firing process, Fluorine resin layer coating process, A method of manufacturing a cooking vessel made of heat-resistant porcelain comprising an induction thermal transfer film layer pressing process. The method of claim 3, wherein The cooking method of the cooking vessel made of heat-resistant ceramics, characterized in that the baking is carried out at a temperature of 920 ℃. The method of claim 3, wherein The glaze has a composition ratio of bio 1%, ferrite 45%, talc 5%, silica 40% and limestone 9%. The method of claim 3, wherein The main firing process is a cooking vessel manufacturing method of heat-resistant ceramics, characterized in that carried out at a temperature of 1300 ℃. The method of claim 3, wherein The fluorine resin layer coating process is a cooking vessel manufacturing method of the heat-resistant porcelain, characterized in that the sanding treatment for spraying gold steel as a pretreatment process. The method of claim 3, wherein The method of manufacturing a cooking vessel made of heat-resistant porcelain, characterized in that the fluorine resin layer coating process by spraying the fluorine resin to a thickness of 10 to 15 microns in the primer step, 15 to 20 microns thick in the medium / upper phase respectively. The method of claim 8, After the primer step, the drying vessel is a cooking vessel manufacturing method characterized in that the drying process is continued at a temperature of 200 ℃ to 250 ℃. The method of claim 8, After the middle / top coat step, the drying and baking process is continued for 7 to 10 minutes at a temperature of 420 ℃ to 430 ℃ method of manufacturing a cooking vessel made of heat-resistant ceramics. The method of claim 3, wherein The induction thermal transfer film layer is a cooking vessel manufacturing method of the heat-resistant pottery characterized in that the process of heating and baking the cooking vessel at a temperature of 780 ℃ after compression is followed for 120 to 150 minutes. The method of claim 3, wherein Method for producing a cooking vessel made of heat-resistant porcelain, characterized in that the fluorine resin is coated on the surface of the marble fluorine resin spray coating.

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