JPH0755182B2 - rice cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rice cooker having an inner pot in which at least an inner surface is doubly coated with a fluororesin.

[Prior Art] Since fluorine resin has excellent heat resistance, corrosion resistance, non-adhesiveness, and the like, it is used by coating it on the surface of an aluminum substrate that constitutes a cooking device. These characteristics are effectively utilized, such as coating the surface of an aluminum base forming the inner pot with a fluorine resin in advance to prevent the adhesion of rice to the inner surface of the inner pot. By the way, in general, when forming a fluororesin layer, in a flat plate-shaped aluminum material before pressing into an inner pot shape, at least one surface of the aluminum material is preliminarily coated, and the aluminum material is pressed into an inner pot. Later, there is a method of coating the inner surface.

[Problems to be Solved by the Invention] According to the above-mentioned conventional techniques, in any case, if the surface of the aluminum substrate constituting the inner pot is coated with a single layer of fluororesin, the coating is performed before press-molding the inner pot. Then, there is a problem that contact with a press machine or damage to the pre-coated fluororesin due to cracking of the material during molding, etc., and sufficient corrosion resistance cannot be obtained, and with the method of coating after molding the inner pot,
There is a problem that it is difficult to uniformly perform the surface treatment on the inner surface, and as a result, the adhesion of the fluororesin to the inner pot is poor, and the coating operation of the fluororesin layer is also difficult, so that the uniform thickness cannot be formed.

The present invention has been made in order to solve these problems, and in particular, it is intended to coat a fluororesin before molding the inner pot, and has an inner pot having a fluororesin layer capable of obtaining excellent corrosion resistance. It is intended to provide a rice cooker.

[Means for Solving the Problems] A rice cooker according to the present invention includes an inner pot which is formed into a predetermined shape by press working and at least the inner surface of which is coated with a fluororesin, and the fluororesin constitutes the inner pot. It is a double coating on the surface of an aluminum alloy base before press working.

Further, the inside of the double coated fluororesin is a colored layer and the outside is a non-colored layer.

Further, the inner pot is molded into a substantially square shape.

[Operation] In the rice cooker according to the present invention, since the surface of the aluminum substrate forming the inner pot is doubly coated before the pressing, the rice cooker can prevent the fluorine resin from being damaged during the pressing.

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

In FIG. 1, 1 is a square frame, 2 is a square outer pot provided in the frame 1, 3 is a square inner pot detachably provided in the outer pot 2, and FIG. As shown concretely in FIG. 3, it has two horizontal portions 4 and 5 extending horizontally in the peripheral portion. As shown in FIG. 4, the inner pot 3 includes an aluminum base 6 having a thickness of, for example, 2 mm or more, and a first base coated on the surface of the aluminum base 6.
And a second fluororesin 8 coated on the first fluororesin, all of which are coated on the surface of the aluminum base before it is pressed into an inner pot shape. To be done. The first fluororesin 7 is a colored layer in which a dye is mixed in advance, and the second fluororesin 8 is a transparent non-colored layer. Therefore, the color mixed in the first fluororesin 7 appears on the surface of the inner pot 3 through the second fluororesin 8, and as a result, a glossy fluororesin coating is formed on the surface of the inner pot. Then, as shown in FIG. 5, the first fluororesin 7 is coated on at least one surface of a flat plate-shaped aluminum substrate 6 having a thickness of, for example, 2 mm or more, and after this is solidified, the The inner pot is formed by coating the second fluororesin 8 and solidifying it, and then pressing this aluminum substrate into, for example, a square shape with the fluororesin inside.

In addition, 9 is a rice cooking heater provided in a space below the outer pot 2 and the inner pot 3, 10 is a heat sensitive device for detecting the temperature of the inner pot 3, and 11 is a heat-retaining body heater provided on the outer periphery of the outer pot 2. , 12 are rectangular lids, which have an outer lid 13 and an inner lid 14, and are attached to the frame 1 so that the opening of the inner pot 3 can be opened and closed. This lid 12
The outer lid 13 comes into contact with the horizontal portion 5 of the inner pot 3 through the packing 15 and the inner pot 14 comes into contact with the horizontal portion 4 of the inner pot 3 so that the steam in the inner pot does not leak when cooking rice. . Reference numeral 16 is a steam vent valve provided in the outer pot 2, and 17 is a lid heater.

In the above embodiment, the first fluororesin 7 and the second fluororesin 8 are used.
Since and are coated on the surface of the aluminum base that constitutes the inner pot before press working, the thickness of the fluororesin layer can be made uniform throughout, and this is a cushioning material between the die and the mold during press working. As a result, damage to the fluororesin itself can be prevented. In particular, since the first fluororesin is used as the colored layer, the hardness of the first fluororesin is increased, the defects of the surface treatment of the underlayer can be covered, and the binder becomes the first.
It is possible to firmly adhere the fluororesin of (3) to the surface of the inner pot. Further, the second fluororesin layer has a large inherent non-adhesiveness of the fluororesin, has an effect of preventing rice from adhering, and has slipperiness, so that friction with the die during press working is reduced, and press workability is improved. Well, it does not scratch the fluororesin layer.

In addition, although the inner pot formed of only the aluminum base has been described in the above embodiment, since the surface of the aluminum base is generally coated with the fluororesin, even if the inner pot is made of a metal base other than aluminum, If the surface is composed of at least an aluminum substrate, the same can be done.

[Effects of the Invention] As described above, according to the present invention, since the surface of the aluminum base constituting the inner pot is double-coated with the fluororesin before the pressing, the fluororesin layer is formed by the pressing. It is possible to obtain a fluororesin coating which can prevent damage and has excellent corrosion resistance.

Also, since the aluminum substrate side is a colored layer and the colored layer is double-coated as a non-colored layer,
The adhesion of the fluororesin to the surface of the inner pot is improved, and sufficient non-adhesiveness against rice etc. can be secured.

Further, when the inner pot is pressed into a substantially square shape, it is possible to prevent the fluororesin from being damaged, and it is possible to obtain a product having excellent corrosion resistance.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a perspective view showing the inner pot thereof, FIG. 3 is a sectional view showing the inner pot of FIG. 2, and FIG. 4 is an enlarged view of the inner pot. A sectional view and FIG. 5 are perspective views showing an aluminum substrate before press working on the inner pot. In the figure, 2 is an outer pot, 3 is an inner pot, 6 is an aluminum base, 7 is a first fluororesin, and 8 is a second fluororesin. The same reference numerals in the drawings indicate the same or corresponding parts.

Front page continuation (72) Wataru Fujimoto Inventor Wataru Fujimoto 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Equipment Co., Ltd. (56) Reference JP-A-54-39364 (JP, A) 9524 (JP, U)

Claims (3)

[Claims] 1. An inner pot having a predetermined shape formed by press working and having at least an inner surface coated with a fluororesin, wherein the fluororesin is formed on the surface of an aluminum substrate constituting the inner pot before the press working. Rice cooker characterized by being heavily coated. 2. The rice cooker according to claim 1, wherein the inside of said double-coated fluororesin is a colored layer and the outside is a non-colored layer. 3. The rice cooker according to claim 1, wherein the inner pot is molded into a substantially rectangular shape.