JP2739638B2 - Cooking container and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking container such as a pot or a frying pan mainly composed of copper and having excellent durability, and a method of manufacturing the cooking container.

[0002]

2. Description of the Related Art Metal cooking containers such as pots and frying pans used for boiling food are mainly made of copper, in addition to materials such as iron, aluminum, anodized aluminum, stainless steel and enamelling. Things are also used.

[0003] Cooking vessels mainly made of copper have been used particularly frequently in recent years because of their beautiful luster and rapid heat generation. On the other hand, this copper cooking container is easily scratched, and has problems such as dissolution by salt and generation of chlorinated copper carbonate (green-blue) due to oxidation. A double-layered structure is available on the market.

[0004]

However, a cooking vessel having a double structure of copper and plated metal formed by such metal plating cannot avoid generation of pinholes during plating. Further, at present, the plating is easily peeled off, thereby shortening the life of the cooking container.

SUMMARY OF THE INVENTION In view of the above situation, an object of the present invention is to form a solid multi-layered cooking container by forming a layer of a different material on at least the inner surface of a cooking container made of copper and integrating the layers. An object of the present invention is to provide a cooking container that can be formed and used safely over a long period of time, and a method of manufacturing the same.

That is, according to the first aspect of the present invention, a first layer made of an alloy of copper and nickel, a second layer made of nickel, and a second layer made of ceramic are formed on at least the inner surface of the main body of the cooking container made of copper. A cooking vessel characterized in that three layers, a fourth layer made of fluororesin, and a fifth layer made of ceramic-containing fluororesin are sequentially formed and integrated by baking.

According to a second aspect of the present invention, at least the inner surface of the main body of the cooking vessel made of copper is buffed and degreased, and the copper and nickel layers on the surface of the main body are plated or sprayed with nickel. A second layer of nickel is formed on the interface of the second layer via a first layer of a copper-nickel alloy layer, and the surface of the second layer is blasted to fill the pinholes generated by the plating or thermal spraying. A third layer of ceramic is formed by thermal spraying, and a fourth layer of a fluororesin primer is formed on the surface of the third layer. A fifth layer of a mixture of ceramic and fluororesin is overcoated on the surface of the fourth layer. A method for manufacturing a cooking container, comprising forming and integrating these layers by heat treatment.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The coating of a different kind of material to be formed on the copper body of the cooking vessel of the present invention is at least on the inner surface of the vessel, but of course it may be formed on other parts. The first layer of this layer is a copper-nickel alloy layer, and the second layer is the first layer.
A nickel layer for forming a copper-nickel alloy layer. In order to form the copper-nickel alloy layer of the first layer, it is desirable to form nickel plating or spraying relatively thick, and the thickness is 5 to 10 μm, preferably 8 to 10 μm.
It is around μ.

After forming the second layer of nickel,
By performing degreasing baking at a high temperature of 400 ° C., degreasing and impurities can be removed, and then the pinholes on the surface can be crushed by blasting. The third layer is a ceramic layer that is tightly bonded to the second nickel layer. As the ceramic used for the third layer, an alumina-based ceramic composed of aluminum oxide (alumina) and titanium oxide (titania) is preferable. Used for

The fluororesin used for the fourth layer serves as a primer for enhancing the bonding between the third layer ceramic and the fifth layer ceramic-containing fluororesin.

The fifth layer of the ceramic and fluororesin layers comprises:
After applying this to a thickness of 20 ~ 30μ, temperature 380 ℃ ~ 400
Bake at 20 ° C for 20-25 minutes.

[0012]

According to the cooking container of the present invention, a material different from the copper material is sequentially formed in at least five layers on at least the inner surface of the copper container body, and this is baked and integrated to form a strong protective film. Thus, a copper cooking container having excellent durability can be obtained.

The method of manufacturing a cooking vessel according to the present invention is characterized in that at least the inner surface of the body of the degreased copper cooking vessel is plated with nickel or sprayed to form an interface between the copper and nickel layers on the body surface from the copper-nickel alloy layer. A second layer of nickel is formed through the first layer, a surface of the second layer of nickel is blasted, a third layer of ceramic is formed on the surface by thermal spraying, and a primer of fluororesin is formed on the surface. Forming a fourth layer and a fifth layer by overcoating a mixture of a ceramic and a fluororesin, and integrating them by heat treatment, thereby facilitating the production of an excellent copper cooking vessel without pinholes and without peeling. Can be obtained.

[0014]

The present invention will be described in more detail with reference to the following examples. The cooking container of the present invention forms a main body by forming into a shape such as a pot or a frying pan with copper, and forms a layer of a material different from copper on the inner bottom surface or the inner side surface of the main body.

That is, since the copper pot body obtained by the pressing process always has a scratch, a rishi ground, etc., it is removed by buffing. Next, degrease this body, and the inner surface (inner surface and inner bottom surface) of the body
Is plated with nickel. Instead of this plating, thermal spraying of nickel may be used. The thickness of the plating is 5
1010μ, which is considerably thicker than the conventional plating thickness of 3-5μ. This plating or spraying forms a special alloy layer consisting of copper-nickel between the copper material and the nickel layer. . Therefore, at this stage, a second layer composed of a nickel layer is formed on the surface of the copper cloth via the first layer composed of the copper-nickel alloy, and this first alloy layer is formed of the second nickel layer. The interposition therebetween can improve the adhesion strength.

In this nickel plating or thermal spraying, a pinhole is generated in the second nickel layer. The pinhole is buried by sandblasting or the like to fill the pinhole and make the surface moderately rough. To improve the strength by improving the bite of the steel. Subsequently, a third layer made of ceramic is formed on the surface. As the ceramic to be used, an alumina-based ceramic comprising a blend of aluminum oxide (Al ₂ O ₃ ) and titanium oxide (TiO ₂ ) can be preferably used, and this is sprayed onto the surface of the second layer. It is formed by:

Next, as a primer for forming a strong layer of the fluororesin layer containing ceramic by the fifth layer,
An undercoat layer of fluororesin is formed as a fourth layer on the surface after the formation of the third layer.

Subsequently, the surface of the fourth layer is overcoated with the fluororesin containing the ceramic, and the fifth layer made of the fluororesin containing the ceramic is formed by baking. This fluororesin containing ceramics is composed of an equal mixture of the above-mentioned ceramic for forming the third layer and the fluororesin for forming the fourth layer. It is carried out at a temperature of 400 ° C. for a time of 20 to 25 minutes to form a film having a thickness of 20 to 30 μ. Thereby, the first layer to the copper body are
The coating of the fifth layer is integrated so that it is not easily scratched and a strong coating without peeling is formed.

Next, after the oxide film on the surface formed by the above-mentioned baking is pickled with sulfuric acid (at a concentration of about 10 to 15%), washing with water or washing with water is repeated and dried thoroughly.

Thereafter, the entire container including the film-forming surface is polished with a polishing machine to finish the surface and degreased. After that, a surface discoloration inhibitor is preferably applied to form a surface discoloration prevention film. Specifically, a cooking container which is a product of the present invention is obtained.

The cooking vessel thus obtained is harder than the conventional two-layered cooking vessel in which the surface of copper is plated with nickel or tin, and has a durability such that it is hardly damaged and does not peel off. An excellent cooking container can be obtained.

[0022]

According to the cooking container of the present invention, a material different from the copper material is sequentially formed in at least five layers on at least the inner surface of the copper container body, and this is baked and integrated to form a strong protective film. It is possible to obtain a copper cooking container having excellent durability when formed.

In the method of manufacturing a cooking vessel according to the present invention, a copper-nickel alloy layer is formed on the interface between the copper and nickel layers on the surface of the body by plating or spraying nickel on at least the inner surface of the body of the copper cooking vessel. Forming a second layer of nickel through one layer, blasting the surface of the nickel layer of the second layer, and forming a fifth layer by overcoating a mixture of ceramic and fluororesin on the surface by thermal spraying;
By integrating by heat treatment, an excellent copper cooking container free of pinholes and free of peeling can be easily obtained.

The cooking container obtained by the production method of the present invention has improved strength compared with a conventional cooking container having an inner surface processed of silver, tin, nickel or the like, and is free from scratches and peeling.
There is no discoloration due to water quality or seasonings, and of course no patina. In addition, the heating area is large, and cooking can be performed quickly, which is economical. Because it is possible to make grilled and stir-fried dishes without oiling, it is easy to make healthy dishes, and it has an excellent effect that cooked dishes such as grilled, boiled and stir-fried dishes do not stick to the main body . Furthermore, after cooking, the cooking paper for cooking can be prepared without washing the inner surface with water.
It is an excellent effect of the present invention that it is only necessary to wipe off with such a method.

Claims (3)

(57) [Claims] 1. A first layer made of an alloy of copper and nickel, a second layer made of nickel, a third layer made of ceramic, and a fluororesin on at least an inner surface of a main body of a cooking container made of copper. A cooking container, wherein a fourth layer and a fifth layer made of a ceramic-containing fluororesin are sequentially formed and integrated by baking. 2. A buffing and degreasing process is performed on at least the inner surface of the main body of the cooking vessel made of copper, and the surface of the main body is plated with nickel or sprayed with nickel to form an interface between the copper and the nickel layer. Forming a second layer of nickel via a first layer of a nickel alloy layer;
After blasting the surface of the layer to fill the pinholes generated by the plating or thermal spraying, a third layer of ceramic is formed by thermal spraying, and then a fourth layer of fluororesin primer is formed on the surface. A method for manufacturing a cooking container, comprising forming a fifth layer on the surface of the fourth layer by overcoating a mixture of a ceramic and a fluororesin, and integrating these layers by heat treatment. 3. The method according to claim 2, wherein the heat treatment is performed at a temperature of 380 ° C. to 400 ° C. for 20 minutes to 25 minutes.