JP3270733B2 - Cooking surface structure of heating cooking appliance 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 surface structure of a cooking device for performing high-temperature cooking and a method of manufacturing the same, and more particularly, to abrasion resistance to a ceramic or enameled tray, a metal knife and a metal spatula. The present invention relates to a cooking surface structure which has less stickiness even when food is cooked at a high temperature and has non-adhesiveness with less noticeable burn marks.

[0002]

2. Description of the Related Art In a cooking device for high-temperature heating such as a hot plate, an electric pan, and a frying pan, a cooking surface structure having a non-adhesive top coat layer of a fluororesin or the like on the cooking surface is used.

FIG. 6 is a sectional view schematically showing a hot plate. This hot plate has a plate side surface 1 and a plate bottom surface 2, and a cooking surface structure for high-temperature heating is formed on a surface 3 s inside a metal base 3 forming the plate.

[0004] The cooking surface structure of a conventional high-temperature heating cooking appliance will be described in more detail. FIG. 7 is a sectional view schematically showing the cooking surface structure. In this cooking surface structure, for example, a surface 3s to be a cooking surface of the metal base material 3 such as an aluminum alloy die-cast molded product is roughened by sandblasting or the like, and a top coat covering the roughened surface 3s is formed. A fluororesin layer 4 is provided as a layer.

As another cooking surface structure, there is a cooking surface structure disclosed in Japanese Patent Publication No. Sho 60-21732 as shown in FIG. This is the metal substrate 3 that constitutes the cooking surface.
And a hard inorganic layer 5 formed by spraying ceramics made of alumina or titania, which is provided so as to cover at least a rough surface 3s to be a cooking surface of the metal base material 3, and an opening of the hard inorganic layer 5 is sealed. And a heat-resistant resin coating layer 6 having good permeability for forming holes.

A primer layer 7 is provided so as to cover the surfaces of the hard inorganic layer 5 and the heat-resistant resin coating layer 6, and a fluororesin layer 8 is provided so as to cover the surface of the primer layer 7. The primer layer 7 is formed of a hard inorganic layer 5
It is formed by applying an undercoat paint for improving the adhesion between the resin and the fluororesin layer 8.

[0007]

However, in the conventional cooking surface structure of a cooking device for high-temperature heating, the cooking surface can be rubbed by a hollow enamel finish or a ceramic tray, various metal knives or a metal spatula used at the time of cooking. This may damage the fluororesin layer. as a result,
In the short-term use, the base material is corroded by salt contained in cooked foods and seasonings, and in the long-term use, the base material is corroded by repeated washing after cooking, causing the fluororesin layer to peel off,
Marks such as burns and stains remain. As a result, there is a problem that the cooking surface becomes unsightly and has no use value.

[0008] Further, in order to produce a conventional cooking surface structure having a hard inorganic layer, a ceramic is sprayed.
Separate spraying equipment was required, and it could not be manufactured with existing coating equipment alone.

In view of the above, the present invention improves the scratch resistance and the peeling resistance, does not corrode the cooking surface even when used for a long time, and even when high-temperature cooking is performed, the surface of the cooking surface, such as a scorched trace of food, etc. An object of the present invention is to provide a cooking surface structure of a cooking appliance for high-temperature heating without causing stain contamination.

[0010]

Means for Solving the Problems According to the present invention, a heat-resistant lower layer containing a ceramic pigment as a main component and a heat-resistant resin is formed on a base material constituting a cooking surface,
A cooking surface structure in which a non-sticky upper layer containing a non-sticky resin is formed so as to cover the surface of the lower layer. Alternatively, a heat-resistant lower layer containing a ceramic pigment as a main component and containing a heat-resistant resin is formed on a substrate, and an intermediate layer containing a ceramic pigment and a non-adhesive resin is formed so as to cover the surface of the lower layer. Is a cooking surface structure in which a non-sticky upper layer containing a non-sticky resin is formed so as to cover the cooking surface.

The composition of the lower layer is such that the heat-resistant resin such as polyethersulfone resin is 10 to 30%, the ceramic pigment such as alumina is 70 to 90%, and the film is thicker than the other layers. The composition of the middle layer is 10-30% of ceramic pigment such as alumina, 30-70% of non-adhesive resin such as fluororesin, and 20-40% of heat-resistant resin such as polyamideimide resin. That is, the middle layer has a composition that has characteristics of both the lower layer and the upper layer.

According to the cooking surface structure described above, the lower layer contains a ceramic pigment to improve the scratch resistance and the adhesion to the material, and the middle layer contains the ceramic pigment to improve the scratch resistance. The upper layer has good non-adhesiveness.

Therefore, even if a tray, a metal spatula or the like is used, the cooking surface is not easily damaged, does not corrode even in long-term use, and does not scorch food or cause stain contamination. A cooking surface structure suitable for high-temperature cooking is obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a cooking surface structure of a cooking device for high-temperature heating according to the present invention is applied to an inner box of a microwave oven will be described in detail with reference to the drawings.

FIG. 2 is a perspective view of a microwave oven to which a cooking surface structure according to an embodiment of the present invention is applied, and FIG. 3 is a perspective view of an inner box of the microwave oven. This microwave oven has an outer box 11
An oven tray 14 is inserted into and removed from a heating chamber 13 provided in the outer box 11. An inner box 15 forming a heating chamber 13 is fitted into the outer box 11.

The inner box 15 includes left and right side plates 16a, 16b.
, A top plate 17, a bottom plate 18, a back plate 19, and a frame-shaped front plate 20 having an opening. The one side plate 16a is formed with an interior lamp hole portion 21 punched as an illumination window of the interior lamp, and a hot air intake / exhaust port (not shown). Further, the top plate 17 is formed with a heat irradiation hole portion 22 which is punched to introduce heat of a heater (not shown) provided on the top plate 17 into the heating chamber 13.

The left and right side plates 16a, 1
6b, top plate 17, bottom plate 18, back plate 19 and front plate 20
Constitute cooking surfaces, to which the cooking surface structure of the present embodiment is applied.

That is, as shown in FIG. 1, the cooking surface structure of the present embodiment comprises a metal base 30 constituting the inner box 15.
A heat-resistant lower layer 31 containing a ceramic pigment as a main component and containing a heat-resistant resin, and a non-adhesive upper layer 32 containing a non-adhesive resin and covering the surface of the lower layer 31 are formed thereon.

The base material of the inner box 15 as the base material 30 is a stainless steel plate, an aluminum-plated or aluminum-zinc alloy-plated steel plate, and the lower layer is formed so as to cover at least the cooking surface 30s of the base material 30. A non-adhesive film 33 composed of two layers 31 and 32 is formed.

In the lower layer 31, a paint made of a polyether sulfone resin (PES) as a heat-resistant resin and an alumina ceramic pigment having heat resistance, hardness, and corrosion resistance as a ceramic pigment are used. Polyether sulfone resin 10 was used as the dry coating composition (composition ratio) of the lower layer forming paint.
-30%, alumina ceramic pigment 70-90%, carbon black coloring pigment 0.1-3%. Note that silicon carbide or silicon nitride may be used instead of alumina, and polyphenylene sulfide resin (PPS) or polyamide imide resin may be used instead of polyether sulfone resin.

In the upper layer 32, a colored paint made of a fluororesin (for example, tetrafluoroethylene resin) is used as the non-adhesive resin, and is formed so as to cover the surface of the lower layer 31. The dry layer composition (constituent ratio) of the upper layer coating composition is composed of 95 to 98% of a tetrafluoroethylene resin and 1 to 5% of a coloring pigment such as carbon black or pearl pigment.

Next, a method of manufacturing the cooking surface structure will be described. First, the surface of the base material of the inner box 15, which is the base material 30 constituting the cooking surface, is degreased with a weak alkaline solution, a solvent, or the like, to be in a clean state.

On the base material 30, a paint for forming a lower layer is coated with a thickness of 50
Apply to a finish of ~ 100μm, 180 ~ 25
Preliminary drying is performed at 0 ° C. for 5 to 10 minutes to form the lower layer 31. If the base material 30 is heated at 60 to 100 ° C. for about 5 minutes before performing the coating operation, the paint is less likely to drip and the workability is improved, so this pre-heating step may be added.

Further, the outer surfaces of the interior lamp holes 21 and the heat irradiation holes 22 are subjected to correction coating with a lower layer forming paint or an edge cover coat from the outer surface of the heating chamber 13 so as to ensure corrosion resistance. Is also good.

Next, a paint for forming an upper layer is applied on the lower
Apply to a finish of ~ 15μm, 80-120 ° C
Pre-drying for 5-10 minutes, and finally 420-450
Firing at 10 ° C. for 10 to 20 minutes to form the upper layer 32.

When a heater is provided in the heating chamber 13, for example, on the top plate 17 or the like, the temperature becomes extremely high in such a place, and deterioration of the coating resin may be considered. It is preferable to perform masking so that the paint is not applied.

The non-adhesive film 33 formed as described above
For the cooking surface structure provided with, corrosion resistance tests such as a salt spray test or a combined cycle test in which the salt spray test and the heat resistance test were combined showed good results.

The abrasion resistance of the non-adhesive film 33 according to the present embodiment is improved as compared with the conventional film. For example, an open / close test of the door 12 using an actual machine, and the loading and unloading of the oven tray 14 are performed. In practical tests such as tests,
The result without trouble was obtained.

Next, another embodiment in which the cooking surface structure of the high-temperature heating cooking appliance is applied to a hot plate will be described in detail with reference to the drawings. FIG. 4 is a sectional view of a cooking surface structure according to another embodiment, and FIG. 5 is a sectional view of a hot plate to which the cooking surface structure is applied.

As shown in FIG. 4, the cooking surface structure has a heat-resistant lower layer 31 containing a ceramic pigment as a main component and a heat-resistant resin on a metal base 30 constituting the cooking surface.
An intermediate layer 34 containing a ceramic pigment and a non-adhesive resin and covering the surface of the lower layer 31 and a non-adhesive upper layer 32 containing a non-adhesive resin and covering the surface of the intermediate layer 34 are formed.
1. Non-adhesive film 3 consisting of three layers: 1, middle layer 34 and upper layer 32
5 is assumed.

The lower layer 31 and the upper layer 32 have the same coating structure as the lower layer forming paint and the upper layer forming paint. In the middle layer 34, a coating material containing an alumina ceramic pigment having heat resistance, hardness, and corrosion resistance as a ceramic pigment, a fluororesin as a non-adhesive resin, and a polyamideimide resin having heat resistance and abrasion durability is used. The dry coating composition of the coating for forming the middle layer is composed of 10 to 30% of a ceramic pigment, 20 to 40% of a polyamideimide resin, 30 to 70% of a fluororesin, and 0.1 to 3% of carbon black as a coloring pigment. You.

Next, a method for manufacturing the cooking surface structure will be described. The base material of the hot plate, which is the base material 30 constituting the cooking surface, uses, for example, aluminum die-casting, and the surface 30s is roughened by sandblasting or the like to form irregularities. By forming the irregularities in this way, the adhesion to the lower layer forming paint is improved. If the adhesion of oil etc. is remarkable, the surface of the aluminum die cast is degreased with a weak alkaline solution or solvent,
After the fats and oils are decomposed at a high temperature of about 400 ° C., sand blasting is performed.

Before performing the coating operation, the substrate 30 is
Heat at 0 ° C. for about 5 minutes. By performing the heating, workability for thickening the film is improved.

Then, a coating material for forming a lower layer is applied on the substrate 30 so as to have a finish of 50 to 100 μm,
Preliminary drying is performed at 250 ° C. for 5 to 10 minutes to form the lower layer 31.

Further, a coating material for forming a middle layer is applied on the lower layer 31 so as to have a finish of 10 to 20 μm,
Preliminary drying is performed at 0 ° C. for 5 to 10 minutes to form the middle layer 34.

On top of this middle layer 34, a paint for forming an upper layer
It is applied to a finish of 15 μm, pre-dried at 80 to 120 ° C. for 5 to 10 minutes, and finally 420 to 450 ° C.
For 10 to 20 minutes to form the upper layer 32.

The thus formed non-adhesive film 35 was subjected to a corrosion resistance test in which ketchup, other foods, and seasonings were added and boiled. The results showed good results, and a steak knife was used. The practical abrasion resistance was dramatically improved as compared with the conventional film. Even after the practical abrasion test, a corrosion resistance test in which ketchup, other foods and seasonings were added and boiling was performed showed good results.

As described above, according to the cooking surface structure of each of the above-described cooking appliances for high-temperature heating, the scratch resistance and the peeling resistance to the enamel finish or the ceramic tray, the metal knife and the metal spatula are improved. The composition and thickness of the resin and pigment used in each coating layer and the structural conditions are appropriately selected. That is, the lower layer contains a ceramic pigment to ensure scratch resistance and adhesion to the material constituting the cooking surface, and the middle layer contains a ceramic pigment to ensure scratch resistance, and the upper layer has a non-scratch resistance. Adherence is ensured.

Therefore, since the scratch resistance and abrasion resistance are enhanced by the characteristic coating composition of the lower layer and the middle layer and the thicker lower layer, enamel finish or ceramic tray, various metal knives, Use of a metal spatula becomes possible. In addition, it is difficult for the scratch to reach the material, the corrosion resistance is improved, and the cooking surface does not corrode even during long-term use.
Even when cooking at a high temperature of 0 ° C., the cooking surface is not scorched by foods or the like, and stain contamination is not caused.

Thus, for a cooking surface structure of a hot plate in which the cooking surface is frequently rubbed, it is suitable to form a three-layer non-adhesive film from the viewpoint of scratch resistance, and there is little chance of rubbing. 2 for the cooking surface structure of the microwave oven
Even if a non-adhesive film of the layer is formed, sufficient scratch resistance can be secured. However, also in a microwave oven, a three-layer non-adhesive film may be formed on the bottom plate, which is frequently rubbed when the tray is taken in and out. Therefore, whether to provide the middle layer is selected in consideration of the environment in which the cooking surface is used.

Further, since no thermal spraying equipment is required to manufacture the cooking surface structure, the cooking surface structure of the cooking equipment for high-temperature heating can be manufactured only with the existing coating equipment, and the manufacturing cost increases. Can be suppressed.

The present invention is not limited to the above embodiment, and many modifications and changes can be made within the scope of the present invention.

[0043]

As is apparent from the above description, according to the cooking surface structure of the cooking device for high-temperature heating of the present invention, the lower layer contains a ceramic pigment so that the scratch resistance and the adhesion to the material are ensured. be able to. Also, by including a ceramic pigment in the middle layer, scratch resistance can be ensured.

As a result, the cooking surface is enhanced in the scratch resistance and the peeling resistance, so that the cooking surface is damaged and the film is not damaged even if an enamel finish or a ceramic tray, a metal knife or a spatula is used. It does not peel. In addition, since the scratch does not easily reach the base material even during long-term use, the cooking surface does not corrode, and the corrosion resistance is improved. Also,
Even when the high-temperature cooking is performed, the cooking surface can be maintained without being scorched by foods or the like, and stained without causing stains.

Therefore, according to this cooking surface structure, it is possible to perform sharp and quick work by hand handling and cutting work when cooking food, and high-temperature cooking can be performed while improving the taste by high-temperature cooking.

Further, in the method of manufacturing the cooking surface structure, since it can be manufactured only with the existing coating equipment, the manufacturing method can be easily performed without the need for the thermal spray equipment required for manufacturing the conventional cooking surface structure. Manufacturing costs can also be kept low.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a cooking surface structure according to an embodiment of the present invention.

FIG. 2 is a perspective view of a microwave oven to which the cooking surface structure according to the embodiment is applied;

FIG. 3 is a perspective view of an inner box of a microwave oven.

FIG. 4 is a sectional view of a cooking surface structure according to another embodiment.

FIG. 5 is a schematic cross-sectional view of a hot plate to which a cooking surface structure according to another embodiment is applied.

FIG. 6 is a schematic sectional view of a conventional hot plate.

FIG. 7 is a cross-sectional view of a conventional cooking surface structure.

FIG. 8 is a sectional view of another conventional cooking surface structure.

[Explanation of symbols]

 30 base material 31 lower layer 32 upper layer 33 non-adhesive film 34 middle layer 35 non-adhesive film

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-215586 (JP, A) JP-A-6-337117 (JP, A) JP-A-3-32618 (JP, A) 506514 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 36 / 02,27 / 00

Claims (7)

(57) [Claims] 1. A heat-resistant lower layer containing a ceramic pigment in a ratio of 70 to 90% and containing a heat-resistant resin is formed on a base material constituting a cooking surface, and is non-adhesive so as to cover the surface of the lower layer. A non-adhesive upper layer containing an adhesive resin , wherein the lower layer
The cooking surface structure of a heating cooking appliance, characterized in that the film is thicker than the upper layer . 2. The method according to claim 1, wherein the lower layer has a thickness of 50 to 100 μm,
The thickness is set to 5 to 15 m.
A cooking surface structure of the cooking device according to the above. 3. A ceramic material on a substrate constituting a cooking surface.
Pigment is blended at 70-90% and heat resistant resin
Including a heat-resistant lower layer, so as to cover the surface of the lower layer.
A non-tacky upper layer containing a non-tacky resin is formed, wherein the lower layer
Between the ceramic layer and non-stick resin
A lower layer is formed from the upper layer and the middle layer.
Cooking surface of a cooking device characterized by a thick film
Construction. 4. The method according to claim 1, wherein the ceramic pigment in the middle layer is 10 to 3 times.
The cooking surface structure of the cooking device according to claim 3 , wherein the cooking surface structure is blended at a ratio of 0%. 5. The cooking surface structure of a cooking device according to claim 3 , wherein the lower layer has a thickness of 50 to 100 μm, the middle layer has a thickness of 10 to 20 μm, and the upper layer has a thickness of 5 to 15 μm. . 6. A step of forming a heat-resistant lower layer by applying a coating material containing a ceramic pigment in a ratio of 70 to 90% and containing a heat-resistant resin on a base material constituting a cooking surface; Forming a non-adhesive upper layer by applying a paint containing a non-adhesive resin to the lower layer to a thicker film than the upper layer
A method for manufacturing a cooking surface structure of a heating cooking appliance. 7. A step of forming a heat-resistant lower layer by applying a coating material containing a ceramic pigment in a ratio of 70 to 90% and containing a heat-resistant resin on a base material constituting a cooking surface; A step of forming a middle layer by applying a paint containing a ceramic pigment and a non-stick resin, and a step of forming a non-stick upper layer by applying a paint containing a non-stick resin on the middle layer , A method for manufacturing a cooking surface structure of a heating cooking appliance, wherein the lower layer is thicker than the upper layer and the middle layer .