JPS61115521A - Heating container for cooking - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to heating containers for cooking such as pots, frying pans, kettles, etc., and particularly relates to improvements in heating containers for cooking made of aluminum as a base material.

Traditionally, heating containers for cooking such as pots and kettles have often been made of aluminum from the viewpoint of processability and economy. , an electromagnetic induction heater (hereinafter referred to as an electromagnetic cooker), which is known as a ``heatless cooker,'' cannot be used.

In other words, the heating container for cooking that can be used with an electromagnetic cooker is
This applies to items made of magnetic metals such as ordinary steel, cast iron, and stainless steel, and cooking heating containers based on aluminum cannot be used because the skin electrical resistance of aluminum is α45X10-'0. (at 20 KHz), which is an order of magnitude smaller. For example, the skin electrical resistance of iron is EL9X10-'0 (at 20KHz), while the skin resistance of a general electromagnetic cooker is approximately 5 to 20x1.
Metals with a resistance of 0'Ω can be heated.

As a means to solve the above problems, (1) a patch plate made of a magnetically conductive metal material such as an iron plate is placed on the bottom of an aluminum heating container, (2) a cooking heater is made of a composite material of aluminum and iron or stainless steel. (3) forming a sprayed coating of a magnetically conductive metal material on the bottom of an aluminum heating container;
Although the following methods have been proposed, these methods have disadvantages such as a decrease in thermal efficiency, an increase in manufacturing costs due to the waste of materials, and the occurrence of electrolytic corrosion, and are therefore of little practical use.

In order to solve the above-mentioned problems, the present invention provides a cooking heating container made of aluminum such as aluminum or an aluminum alloy as a base material, in which a coating is formed by anodizing on at least the bottom surface of the container body. Then, a magnetic metal is deposited on the pores in the porous layer forming the film, or on the pores and the surface of the porous layer by electrolytic deposition or electroplating, and the magnetic metal coats the surface of the aluminum base material. By increasing the skin electrical resistance of the material, it is possible to apply it to an electromagnetic cooker.

EMBODIMENT OF THE INVENTION Hereinafter, this invention will be explained in detail based on the drawing which showed an example of its implementation.

In Figures 1 and 2, (1) is an aluminum pot body, (2) is a lid, and an anodized film (3) is formed on the surface of the pot body. 3)
The pores (3a) in the porous layer are filled with fine crystals of ichigo→r-type kamen (4) deposited by the secondary electrolytic treatment.

The example shown in FIG. 3 is another example in which the magnetic metal (4) deposited in the secondary electrolytic treatment is filled in the pores (3a) and on the surface of the porous layer (5). A thin film is also formed on the surface.

According to the structure of the aluminum pot body described above, since the porous surface of the anodized film (5) formed on the body is formed, the surface electrical resistance of the aluminum pot body can be increased, and the electromagnetic cooking It can be used as a heating container that can be used as a heating container. Below, preferred embodiments of this invention will be shown.

Example (1) After pre-treating an aluminum heating container (degreasing, etching, desmutting) using a conventional method (Tan 2005)
/l sulfuric acid bath, bath temperature 20℃, current density 1.2A/dr
Direct current electrolysis was carried out for 60 minutes at RL, and a film thickness of 20 mm was formed on the entire surface of the vessel.
A μm thick anodic oxide film was formed. Next, ferric sulfate 50
p/l, nickel polishing acid 250P/l.

Boric acid 25 P/l, glycerin 209/l, PH
Adjust to 4.0 and conduct secondary electrolysis in the solution at room temperature with alternating current for 20
When this process was carried out for several minutes, it was found that the heating body had the magnetic metals of iron and nickel precipitated by the electrolytic treatment filled in the form of fine crystals in the pores forming the porous layer of the oxide film of the heating container. Obtained. The skin electrical resistance of this heater body was 8 x 10-'Ω.

Example (2) In the same manner as in Example (1) above, the heating container was subjected to an anodic oxide film forming treatment and a secondary dissolution treatment, and then a current density of 2 was applied.
Self-current electrolysis for 10 minutes at “A/dm” or current density 2
A/dm” and 4A/dm” pulse current at 3 second intervals.
When electrolyzed by supplying for 0 minutes, the magnetism of iron and nickel,
A heating container was obtained in which fine metal crystals were filled in the pores forming the porous layer of the oxide film of the container and were formed in a thin film on the surface of the porous layer. This heater body
The skin electrical resistance was 20×10-'Ω.

In the above-mentioned practical example 1+ (21), aluminum steel is used as the heating container, but the present invention is applicable not only to other heating containers such as frying pans and kettles, but also to aluminum alloys made from aluminum as the base material. This can be implemented in a heating container.

In addition, magnetic metals used to increase the skin electrical resistance of aluminum heating containers include iron, nickel, chromium,
There are silver, copper, cobalt, etc., and any of them can be selected and used.

As described above, according to the present invention, in a heating container for cooking made of aluminum, an alloy thereof, or a composite material thereof, a film is formed on at least the bottom portion of the container body by anodizing treatment, and the film is oxidized. Magnetic metal is formed on the pores forming the porous layer of the film, or on the surface of the pores and the porous layer by electrolytic deposition or electroplating, making it possible to use an electromagnetic cooker. An aluminum cooking heating container having skin electrical resistance can be obtained at low cost.

[Brief explanation of drawings]

FIG. 1 is a side view of a pot showing an embodiment of the present invention, and FIGS. 2 and 3 are microscopic cross-sectional views showing a state in which a magnetic metal is formed on the anodized film of the pot body. It is. (1)... Pot body, (2)... Lid, (3)... Anodic oxide film, (3a)... Holes forming a porous layer of oxide film, (3b) ... Porous layer surface, (4)
...Magnetic metal. Patent applicant Cook Vessel Co., Ltd. Figure 3 Figure 1

Claims (1)

[Claims] In a heating container for cooking made of aluminum, its alloy, or a composite material thereof, a film is formed on at least the bottom portion of the container body by anodizing treatment,
A magnetic metal is formed on the pores forming the porous layer of the oxide film, or on the pores and the surface of the porous layer, by electrolytic deposition treatment, electroplating treatment, etc. Heating container for cooking.