JPS61165984A - Heating cooker - 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] Industrial applications The present invention relates to a heating cooker.

BACKGROUND OF THE INVENTION Conventionally, some heating cookers such as electromagnetic induction heating cookers use crystallized glass for cooking plates, but crystallized glass is generally white, and many have similar designs. Therefore, recently, Figure 4, @5
As shown in the figure, a transparent crystallized glass 2 is used for the cooking plate 1, and a colorful paint film 3 is baked on the back side to enable a variety of color designs. A cooker with a significantly different external design was proposed, such as making the 4th grade visible directly through the ceramic glass 3.

Problems to be Solved by the Invention However, the cooking plate of a heating cooker for cooking food at home, such as an electromagnetic cooker, must meet very strict conditions. Regarding heat resistance, especially when the cooking pot 5 is empty, the cooking plate 1 may reach an abnormally high temperature (400' (: ~
500° C.), and there were major restrictions on the material selection for the coating film 3 of the cooking plate. That is, 4oo'CJ
:J, under the above high temperature conditions, conventional organic heat-resistant paints,
It was difficult to use because it caused discoloration. However, by baking a heat-resistant paint whose main component is an inorganic material such as milli-coat at a temperature higher than the above-mentioned heat-resistant temperature (approximately 700°C), we were able to create a paint film 3 that does not discolor. However, it still had one drawback.

That is, transparent crystallized glass generally exhibits almost no expansion due to temperature and does not match the expansion coefficient of the paint film itself, making it impossible to obtain good adhesion. Paint film 3
As shown in FIG. 6, the surface is only attached in granular form to the crystallized glass surface 2, and is easily peeled off in a peel test using cellophane tape or the like. This is due to the lack of expansion coefficient of the ceramic glass 2 mentioned above, as well as the fact that due to extremely high temperature baking, the solvent and binder components in the inorganic paint disappear, making the coating film 3 coarse (porous). are doing.

Therefore, the present invention aims to improve the adhesion with crystallized glass by applying some means to the coating film made of the above-mentioned inorganic material, thereby realizing and providing a colored ceramic plate, which has not been able to be put to practical use in the past. be.

The technical means to solve the problem is to further apply and bake an inorganic clearing agent (for example, water glass) on top of the coating film baked on one side of the crystallized glass. The cooking plate is made up of

In other words, the inorganic clear material enters the gap in the coating film on the cooking plate surface and acts as an adhesive, strengthening the bond between the coating film itself and improving the bonding force with the crystallized glass. It is.

Therefore, as a result, the adhesion between the coating film and the crystallized glass improves, and it becomes difficult to peel off easily.

Example 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, on which an inorganic coating film 8 is baked on the back side of a transparent crystallized glass 7, and then an inorganic coating film 8 made of water glass or the like is coated on top of the inorganic coating film 8. The transparent clear 9 type is baked on. 1o is a container case, 11 is a heating coil, and 12 is a cooking pot. Figure 2,
In FIG. 3, the inorganic coating film 8 is baked on the back surface of the transparent crystallized glass 7 at a high temperature (about 700° C.), and is adhered in a coarse porous manner. The inorganic transparent clear 9 is baked at a slightly low temperature (approximately 300°C), and a portion of it infiltrates into the gaps in the inorganic paint film 8, forming a composite film with the inorganic paint film 8. It is also baked onto seven surfaces of the translucent crystallized glass.

Now, the effects of the above embodiment will be explained.

The inorganic transparent clear 9 has water glass as its main component, but when it hardens at a temperature above a certain level, it acts as an adhesive. It also serves to connect the chemical glass 7 and the coating film 8. Moreover, since the transparent clear-9 itself forms a layer of film, the inorganic coating film 8 can be protected. Therefore, by applying inorganic transparent clear 9,
Translucent crystallization of the inorganic coating film 8, which has been extremely difficult in the past, can improve its adhesion to the lath T.

Now, the cooking plate made of crystallized glass with a coating film having the above structure has a practical maximum temperature of 400°C to 50°C.
Even in a cooking pot dry cooking test at 00°C, there was no discoloration, almost no decrease in adhesion, and the product was sufficiently durable for practical use.

Effects of the Invention The present invention achieves translucent crystallization of an inorganic paint film by further baking an inorganic clear on the inorganic paint film baked at high temperature on the back side of a transparent crystallized glass. By improving the adhesion to glass, we were able to create a colored ceramic plate, which was previously extremely difficult, and as a result, it became possible to diversify and improve the external design of the heating cooker itself.

[Brief explanation of the drawing]

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 same cooking plate, Fig. 3 is an enlarged sectional view of the same essential part, and Fig. 4 is a heating cooking device in a conventional example. FIG. 6 is a sectional view of the cooking plate, and FIG. 6 is an enlarged sectional view of the main part. 6...Cooking plate, 7...Translucent crystallized glass, 8...Inorganic paint film, 9...
...Inorganic transparent rear. Name of agent: Patent attorney Toshio Nakao Gika) 1 name - Gufu L-L Figure 2 Figure 3

Claims (3)

[Claims] (1) Use translucent crystallized glass as the base material, bake an inorganic paint film on one side of the translucent crystal glass, and then apply and bake an inorganic clear coat on top of this inorganic paint film. A heating cooker having a cooking plate configured as follows. (2) The cooking device according to claim 1, wherein the inorganic clear material has translucency. (3) The heating cooker according to claim 1, wherein the inorganic clear is mainly composed of water glass or the like.