JPH0642388B2 - Heating cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heating cooker.

2. Description of the Related Art Conventionally, there is a heating cooker such as an electromagnetic induction heating cooker that uses crystallized glass for a cooking plate, but in general, crystallized glass is white, and many of them are similar in design. Therefore, recently, Fig. 4 and 5
As shown in the figure, the translucent crystallized glass 2 is used for the cooking plate 1, and the colorful coating film 3 is baked on the back surface to enable various color designs, and a part of the display part is provided with a through hole. There has been proposed a cooking device whose exterior design has been greatly changed, such as making 4 and the like directly visible from the crystallized glass 2.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, the cooking plate 1 of a heating cooker for cooking food at home such as an electromagnetic cooker has very strict requirements. Regarding the heat resistance, especially when the cooking pot 5 is cooked in the air, the cooking plate 1 has an abnormally high temperature (400 ° C to 5 ° C).
Since the temperature of the cooking plate is 00 ° C.), there is a great limitation in selecting the material of the coating film 3 of the cooking plate. That is, under high temperature conditions of 400 ° C. or higher, conventional organic heat-resistant paints have been discolored and difficult to adopt. For this reason, heat-resistant paints composed mainly of inorganic materials such as silica should be used above the heat-resistant temperature (about 7
Coating film 3 that does not discolor by baking at 00 ℃
It was possible to realize, but it still had one drawback.

That is, the crystallized glass 2 having a light-transmitting property generally has almost no expansion due to temperature and does not match the expansion coefficient of the coating film itself, so that good adhesion cannot be obtained. As shown in FIG. 6, the surface of the coating film 3 only adheres to the crystallized glass 2 surface in a granular form, and is easily peeled off by a peeling test such as a cellophane tape. This is because the crystallized glass 2 has no expansion coefficient, and the solvent and binder component in the inorganic coating material disappears due to baking at extremely high temperature, and the coating film 3 has a rough texture (porous shape). Involved.

Therefore, the present invention realizes and provides a colored ceramic plate which has not been put into practical use in the past, by applying some means to the coating film made of the above-mentioned inorganic material to improve the adhesion with the crystallized glass. is there.

Means for Solving the Problems And the technical means is to use a substrate as a translucent crystallized glass, form an inorganic coating film baked at high temperature on one surface of the crystallized glass, and An inorganic transparent clear film is baked on the inorganic coating film at a temperature lower than that of the inorganic coating film, and the transparent clear film is infiltrated into the gap created by the baking of the inorganic coating film to form the inorganic coating film and the transparent clear film. And a cooking plate having a composite film formed of.

Action That is, the above-mentioned inorganic transparent clear that has entered the gap in the coating film on the one surface of the cooking plate serves as an adhesive, strengthening the bonding of the coating film itself and improving the bonding force with the crystallized glass. Because.

Therefore, as a result, the adhesiveness between the coating film and the crystallized glass is improved and the film cannot be easily peeled off.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 6 denotes a cooking plate, which is formed by baking an inorganic coating film 8 on the back surface of the translucent crystallized glass 7, and then forming an inorganic glass film such as water glass on the inorganic coating film 8. The clear clear 9 of the system is baked. Reference numeral 10 is a body case, 11 is a heating coil, and 12 is a cooking pot. Second
In FIG. 3 and FIG. 3, the inorganic coating film 8 is baked on the back surface of the translucent crystallized glass 7 at a high temperature (about 700 ° C.), and adheres in the form of a rough grain. The inorganic transparent clear 9 is baked at a slightly low temperature (about 300 ° C.), and a part of it infiltrates into the gap of the inorganic coating film 8 to form a composite film with the inorganic coating film 8. The light-transmitting crystallized glass 7 is also reached and baked.

Now, the effect of the above embodiment will be described.

The inorganic transparent clear 9 has water glass as its main component, but when it cures at a certain temperature or higher, it works as an adhesive, so that the inorganic coating film 8 itself is firmly bonded and has a light-transmitting property. The crystallized glass 7 and the inorganic coating film 8 are also linked together. Inorganic transparent clear 9
Since the film itself forms a single layer, the inorganic coating film 8 can be protected. Therefore, the application of the inorganic transparent clear 9 can improve the adhesion of the inorganic coating film 8 to the translucent crystallized glass 7, which has been very difficult in the past.

By the way, the cooking plate made of the crystallized glass with a coating film having the above-mentioned configuration has a practical maximum temperature of 400 ° C to 50 ° C.
Even in an empty cooking test at 0 ° C, there was no discoloration, there was almost no deterioration in adhesion, and the product was sufficiently durable for practical use.

EFFECTS OF THE INVENTION The present invention is a transparent crystal of an inorganic coating film obtained by further baking an inorganic transparent clear film on an inorganic coating film baked at a high temperature on the back surface of a transparent crystallized glass. By improving the adhesion to fossil glass and realizing a colorized ceramic plate that has been extremely difficult in the past, it has become possible to diversify and improve the external design of the heating cooker itself.

[Brief description of drawings]

FIG. 1 is a sectional view of a heating cooker according to an embodiment of the present invention, FIG. 2 is a sectional view of the cooking plate, FIG. 3 is an enlarged sectional view of relevant parts, and FIG. 4 is heating cooking in a conventional example. FIG. 5 is a sectional view of the cooking plate, FIG. 5 is a sectional view of the cooking plate, and FIG. 6 ... Cooking plate, 7 ... Translucent crystallized glass, 8
…… Inorganic coating film, 9 …… Inorganic transparent clear.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography SHO 58-27894 (JP, U) ACT 59-33692 (JP, U) ACT 59-74694 (JP, U)

Claims (2)

[Claims] 1. A base material is translucent crystallized glass, an inorganic coating film baked at a high temperature is formed on one surface of the crystallized glass, and the temperature is lower than that of the inorganic coating film on the inorganic coating film. And baking the inorganic transparent clear with the transparent clear and soaking the transparent clear in the gaps created by the baking of the inorganic coating film to form a composite film composed of the inorganic coating film and the transparent clear. Heating cooker. 2. The cooking device according to claim 1, wherein the transparent clear contains water glass as a main component.