JP2006014761A - Heating container to be used for electromagnetic cooker and its production method as well as sheet for electromagnetic cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating container which can be easily manufactured by spraying a simple metal using a low-temperature thermal spraying method on a heating container made of a nonmetallic material such as a clay pot, a ceramic board, glass or a cut native rock and increases the cohesion strength of a spray deposit film so that the delamination and the corrosion of the metal by the electric corrosion are difficult to occur, and to generate extreme infrared rays to increase the thermal efficiency. <P>SOLUTION: The spray deposit film 2 of copper or a copper alloy is formed by the low-temperature thermal spraying method with the membrane thickness of 100 to 300 μm on a bottom surface of the nonmetallic heating container 1 so that it can be used for an electromagnetic cooker IH. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a heating container that can be used for an electromagnetic cooker that can mainly use a non-metallic heating container for an electromagnetic cooker, a method for manufacturing the same, and a sheet for an electromagnetic cooker.

  An electromagnetic cooker is a stove that heats the pan itself like a heater by the action of magnetic lines of force using electromagnetic induction heating (Induction Heating). For example, an eddy current is generated at the bottom of an iron pan placed by a magnetic line generated from a spiral coil, and iron has an electrical resistance, so that the flowing current is changed to heat and heated from the bottom of the pan. The Examples of heating containers that can be used with this electromagnetic cooker include iron pans, iron enamel pans, stainless steel pans, and iron frying pans. Therefore, clay pots and heat-resistant glass could not be used. The reason why the aluminum pan cannot be used is that the resistance is low, so that sufficient heat generation cannot be obtained even if current is passed. Then, the technique for using the non-metallic heating containers, such as ceramics or glass, for an electromagnetic cooker is proposed. For example, as disclosed in Japanese Patent Application Laid-Open No. 2000-23837 “Cooking container that can also be used in an electromagnetic cooker”, a cooking container in which a metal spray coating is formed on the bottom surface of a non-metallic cooking container has been proposed. .

  In the present invention, for a cooking container made of a non-metallic material and having a thick bottom, shot blasting is applied to the outer surface of the bottom, and Al having a thickness of 30 to 50 μm is further formed thereon, and further thereon. Thermal spraying of Cu or Cu alloy (hereinafter referred to as a thermal spray coating) with a thickness of 100 to 200 μm. There has been proposed a method in which a heat-resistant coating material is applied and fixed on the surface and liquid glass is further applied thereon. Furthermore, a cooking container that can also be used for an electromagnetic cooker having the bottom of the above structure has been proposed.

In addition, for a container having a thin container bottom, such as a glass pot, a metal mainly made of Al is sprayed on the bottom surface of the container. A heat resistant coating material is applied and fixed to the surface. A method of applying liquid glass thereon has been proposed. Furthermore, a cooking container that can also be used in an electromagnetic cooker having a bottom of a structure formed by the above-described manufacturing method has been proposed.
JP 2000-23837 A

  In Patent Document 1, Al is sprayed as a base spraying material in order to increase the adhesion, and a thermal spraying material Cu or Cu—Al—Fe alloy material is sprayed on the Al. Adhesion and heating efficiency are improved by stacking and spraying two types of thermal spray materials in this way.

  The conventional non-metallic heating container on which the metal spray coating is formed has a problem that the adhesion strength of the spray metal is weak and peeling is likely to occur. In addition, those which have been subjected to superposition spraying with dissimilar metals such as copper, copper alloy and aluminum / aluminum copper alloy have the problem that delamination due to electrolytic corrosion and metal corrosion are liable to occur.

  Furthermore, the metal sprayed coating is porous (porous) and has insufficient corrosion resistance due to its generation mechanism. Therefore, in order to fill the pores on the porous surface, a sealing treatment was necessary. The heating container not subjected to the sealing treatment has a problem that the coating material is damaged and the thermal spray coating is damaged.

  The present invention has been developed to solve such problems. That is, the object of the present invention is to easily process by spraying a single metal using a low temperature spraying method, and to increase the adhesion strength of the sprayed coating and make it difficult to peel off. The object is to provide a container for heating that is difficult. Furthermore, it is providing the heating container which can be used for the electromagnetic cooker which can generate | occur | produce a far infrared ray, and can improve thermal efficiency, its manufacturing method, and the sheet | seat for electromagnetic cookers.

  According to the heating container of the present invention, it is a non-metallic heating container (1) that can be used in an electromagnetic cooker (IH), and is applied to the bottom surface of the heating container (1) by a low temperature spraying method. A non-metallic heating container usable for an electromagnetic cooker is provided, in which a thermal spray coating (2) of copper or copper alloy having a film thickness of 100 μm to 300 μm is formed.

  Moreover, it is a heating container (1) of a non-metallic material that can be used for an electromagnetic cooker (IH), and copper having a film thickness of 100 μm to 300 μm is formed on the inner surface of the heating container (1) by a low temperature spraying method. Alternatively, a copper alloy sprayed coating (2) is formed.

  It is preferable to apply a heat resistant coating material (3) on the thermal spray coating (2) formed on the heating container (1). The heating container (1) is formed by mixing a far-infrared ray-generating material (4) such as tourmaline, ceramics or glass that generates far-infrared rays when heated and mixed. A far-infrared ray generating material (4) such as tourmaline, ceramics, or glass that generates far-infrared rays by heating can be mixed into the heat-resistant coating material (3) in powder form.

  According to the manufacturing method of the present invention, it is a manufacturing method of a non-metallic heating container that can be used in an electromagnetic cooker (IH), and a rough surface is formed on the bottom surface of the heating container (1). A method of manufacturing a non-metallic heating container usable for an electromagnetic cooker is provided, wherein a thermal spray coating (2) of copper or copper alloy is directly formed on the rough surface by a low temperature spraying method. Is done.

  It is preferable to apply a heat resistant coating material (3) on the thermal spray coating (2) formed on the bottom surface of the heating container (1).

  According to the electromagnetic cooker sheet of the present invention, the electromagnetic cooker sheet (11) laid between the electromagnetic cooker (IH) and the non-metallic heating container (1), which is formed of a nonflammable material. On the surface in contact with the heating container (1) on the plate-like or cloth-like base material (12), copper or a copper alloy was sprayed to form a sprayed coating (13) having a thickness of 100 μm to 300 μm. The sheet | seat for electromagnetic cookers characterized by this is provided.

  For the base material (12), a cloth material crushed ore, heated and melted, processed into a fiber shape and woven is used, and a spray coating (13) is formed on one surface of the cloth material by a low temperature spraying method. is there.

  As described above, in the heating container of the present invention, copper or a copper alloy is sprayed on the bottom surface or the inner surface of a non-metallic heating container (1) such as ceramic that cannot be used in an electromagnetic cooker (IH). Since the thermal spray coating (2) having a film thickness of 100 μm to 300 μm is formed, the heating container (1) is electromagnetically heated by the thermal spray coating (2), whereby the heating container (1) is electromagnetically cooked. (IH) can be used. In particular, by forming the thermal spray coating (2) by a low temperature thermal spraying method, adhesion can be enhanced even with a refractory metal. Further, a heating container (1) formed by mixing and molding a far-infrared ray generating material (4) such as tourmaline, ceramics, or glass that generates far-infrared light when heated is formed into the heating container (1). ), Far infrared rays are generated, so that thermal efficiency can be increased.

In the production method of the present invention, the thermal spray coating (2) is not repeatedly sprayed as in the prior art, so that no failure due to electrolytic corrosion occurs. Moreover, since the heat resistant coating material (3) is applied to the thermal spray coating (2) and the porous portion is forcibly sealed, the thermal spray coating (2) can be prevented from being damaged.
Further, a product manufactured by mixing the far-infrared ray generating material (4) into the heating container (1) itself can be expected to have higher thermal efficiency when the heating container (1) is used.

  In the electromagnetic cooker sheet (11) of the present invention, the thermal spray coating (13) of copper or copper alloy is formed on the plate-like or cloth-like base material (12), and this is used for the electromagnetic cooker (IH). It can be easily cooked by simply placing it on top and placing the heating container (P) thereon.

  Even if it is a non-metallic heating container, the present invention can be used for an electromagnetic cooker by forming a metal spray coating having a predetermined film thickness on the bottom surface of the heating container using a low temperature spraying method. Can do.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a clay pot that is an example of a heating container that can be used in the electromagnetic cooking device of the present invention. FIG. 2 is a cross-sectional view of a ceramic plate as an example of a heating container that can be used in an electromagnetic cooker.
The heating container 1 that can be used in the electromagnetic cooker of the present invention is copper or copper by low temperature spraying on the bottom of the “earthen pot” in FIG. 1 or the “ceramic plate” in FIG. An alloy thermal spray coating 3 is formed to enable electromagnetic induction heating. These earthenware pots, ceramics other than ceramic plates, and glass heating containers 1 can also be used. Furthermore, it can be used also for what formed the cut-out natural stone in the shape of a pan or a plate.

  Further, the shape of the bottom surface of the heating container 1 is optimally flat as shown in FIGS. 1 and 2 so as to be in close contact with the top plate of the electromagnetic cooker IH. If the diameter of the bottom surface is in the range of 10 to 25 cm, it can be used. A thing of about 25 cm or more becomes difficult to transfer heat to the surroundings, and heating may be difficult. Conversely, if the bottom diameter is less than 12 cm or the bottom is round, the thermal efficiency may deteriorate.

FIG. 3 is a flowchart showing a method for manufacturing a heating container that can be used in the electromagnetic cooking device of the first embodiment. FIG. 4 is an enlarged cross-sectional view of the sprayed coating portion of the heating container.
In the manufacturing method of Example 1, first, a blast treatment is performed to form a rough surface on the bottom surface of the heating container 1 such as a non-metallic earthenware pot, a ceramic plate, or heat-resistant glass. This blasting process is a process step in which the abrasive is sprayed onto the heating container 1 using compressed air to polish the surface. In this blasting process, salt and oil adhering to the substrate of the heating container 1 are removed. Thereby, the adhesiveness of the thermal sprayed coating 2 which carries out the metal spraying of the next process can be improved.

  The thermal spray coating 2 is formed on the heating container 1 after the blast treatment by a low temperature spraying method of copper or a copper alloy. This low temperature spraying method is a metal spraying method that is opposite to the room temperature spraying method, and is a spraying method that can form the metal sprayed coating 2 without heating the object to be sprayed (heating container 1) to a high temperature. . The reason why the present invention employs this low-temperature spraying method is that the sprayed object (heating container 1) is processed at a low temperature of 50 ° C. or lower, and therefore there is an advantage that distortion and material change do not occur. . Furthermore, this low temperature spraying method can perform the thermal spraying operation easily and at low cost.

  In Example 1, the sprayed coating 2 was formed using the arc spraying method. In this arc spraying method, for example, an electric current is passed through two wire-shaped metal materials, an arc is generated at the tip of the wire, the wire is melted by the heat, and particles refined by compressed air are sprayed from behind. This is a method for forming the sprayed coating 2. The film thickness of the thermal spray coating 2 at this time was suitably about 100 μm to 300 μm. In particular, the film thickness of 150 μm to 200 μm was good in terms of durability and thermal efficiency. When it was out of the range of 100 μm to 300 μm, the thermal efficiency was extremely deteriorated.

A large number of voids are formed on the surface of the thermal spray coating 2 only by this thermal spraying process, and therefore it is necessary to perform a sealing process. By embedding a slight gap remaining on the sprayed surface, not only a smooth surface can be formed, but also the anticorrosive effect can be enhanced. For example, a heat resistant coating material 3 such as an inorganic sealing agent is applied to the surface of the thermal spray coating 2.
In addition, the heat-resistant coating material 3 can be avoided from being damaged by applying the heat-resistant coating material 3 to the sprayed coating 2 and forcibly sealing the porous portion, and then applying a heat-resistant paint (not shown).

  Furthermore, a coating material mixed with powdered far-infrared ray generating material 4 such as tourmaline, ceramics, or glass that generates far-infrared rays by heating can be applied on the heat-resistant coating material 3. In this way, the generation of far infrared rays can be expected to achieve more efficient thermal efficiency. Or it is also possible to mix and apply the powder form of the far-infrared ray generating material 4 to the heat-resistant coating material 3 itself.

FIG. 5 is a flowchart showing a method of manufacturing a heating container that can be used in the electromagnetic cooking device of the second embodiment. FIG. 6 is an enlarged cross-sectional view of a sprayed coating portion of the heating container.
In Example 2, the far-infrared ray generating material 4 is mixed into the raw material itself of the heating container 1 to produce a heating container. That is, the far-infrared ray generating material 4 is mixed in a powder form into clay, which is a raw material such as “earthen pot” or “ceramic plate”, and is molded and fired. The thermal spray coating 2 is formed on the bottom surface of the heating container 1 by the low temperature thermal spraying method of copper or copper alloy by the method described above. Next, the heat-resistant coating material 3 is applied to the surface of the sprayed coating 2 to perform a sealing process.

FIG. 7 is a flowchart showing a method of manufacturing a heating container that can be used in the electromagnetic cooking device of the third embodiment.
In Example 3, the heating container 1 and the manufacturing method of the present invention are aluminum pots and copper pots that could not be used conventionally, in addition to heating containers 1 such as “earthen pots” and “ceramic plates”. Even in the case of a non-magnetic metal heating container, the present invention can be used. For example, after the bottom surface of a nonmagnetic metal heating container is blasted, a heat resistant paint is first applied, and a thermal spray coating of copper or copper alloy is formed on the heat resistant paint by a low temperature spraying method. Further, a far infrared ray generating material 4 is applied on the sprayed coating. Thus, by forming a metal sprayed coating with a heat-resistant paint interposed therebetween, a nonmagnetic metal heating container can be used for the electromagnetic cooker IH.

FIG. 8 is a perspective view showing the electromagnetic cooker sheet according to the fourth embodiment. FIG. 9 is an explanatory view showing an example of use of the electromagnetic cooker sheet.
In Example 4, instead of forming the sprayed metal coating 2 on the bottom surface of the heating container 1, the sprayed metal coating is applied to a sheet laid between the electromagnetic cooker (IH) and the nonmetallic heating container (earthen pot). It is the sheet | seat 11 for electromagnetic cookers which formed. The electromagnetic cooker sheet 11 is formed by spraying copper or a copper alloy on a surface that comes into contact with a heating container on a plate-like or cloth-like base material 12 formed of a non-combustible material, and spraying the film to a thickness of 100 μm to 300 μm. A film 13 is formed.

  The base material 12 is made of a cloth material obtained by crushing ore, heating and melting it, processing it into a fiber, and weaving it. A spray coating 13 is formed on one surface of the cloth material by a low temperature spraying method.

  In this electromagnetic cooker sheet 11, since the thermal spray coating 13 of copper or copper alloy is formed on the sheet itself, this is laid on the electromagnetic cooker IH, and a nonmetallic heating container is placed thereon. Just cooked.

  In addition, this invention is not limited to embodiment of the invention mentioned above, An eddy current is produced in the sprayed coating 2 formed in the heating container 1 put on by the magnetic force line from the top plate of the electromagnetic cooker IH. The sprayed coating 2 is not limited to the bottom surface of the heating container 1 as long as it can be used, and the sprayed coating 2 can be formed on the inner surface of the heating container 1 and can be variously within the scope of the present invention. Of course, it can be changed.

  The heating container that can be used in the electromagnetic cooker of the present invention, its manufacturing method, and the sheet for the electromagnetic cooker are based on commercially available non-metallic heating containers, clay pots, ceramic plates, or heat-resistant glass that could not be used in the electromagnetic cooker. In addition, aluminum pots with poor thermal efficiency can also be used in the electromagnetic cooker.

It is a container for a heating which can be used for the electromagnetic cooker of this invention, and is sectional drawing of a clay pot. It is a container for heating which can be used for an electromagnetic cooker, and is a sectional view of a ceramic plate. It is a flowchart which shows the manufacturing method of the container for a heating which can be used for the electromagnetic cooker of Example 1. FIG. It is an expanded sectional view of the sprayed coating part of the container for heating. It is a flowchart which shows the manufacturing method of the container for a heating which can be used for the electromagnetic cooker of Example 2. FIG. It is an expanded sectional view of the sprayed coating part of the container for heating. It is a flowchart which shows the manufacturing method of the container for a heating which can be used for the electromagnetic cooker of Example 3. It is a perspective view which shows the sheet | seat for electromagnetic cookers of Example 4. FIG. It is explanatory drawing which shows the usage example of the sheet | seat for electromagnetic cookers.

Explanation of symbols

1 Heating container (earthen pot, ceramic plate)
2 Thermal spray coating 3 Heat-resistant coating material 4 Far infrared ray generating material 11 Electromagnetic cooker sheet 12 Base material 12 Thermal spray coating IH Electromagnetic cooker

Claims (9)

A non-metallic heating container (1) that can be used in an electromagnetic cooker (IH),
A non-metal usable for an electromagnetic cooker, characterized in that a thermal spray coating (2) of copper or copper alloy having a film thickness of 100 μm to 300 μm is formed on the bottom surface of the heating container (1) by a low temperature spraying method. Container for heating. A non-metallic heating container (1) that can be used in an electromagnetic cooker (IH),
A non-metal usable for an electromagnetic cooker characterized in that a sprayed coating (2) of copper or copper alloy having a film thickness of 100 μm to 300 μm is formed on the inner surface of the heating container (1) by a low temperature spraying method. Container for heating. A non-metallic product usable for the electromagnetic cooker according to claim 1 or 2, wherein a heat-resistant coating material (3) is applied on the thermal spray coating (2) formed on the heating container (1). Container for heating. The heating container (1) is formed by mixing and molding a far-infrared ray generating material (4) such as tourmaline, ceramics or glass that generates far-infrared rays when heated. A non-metallic heating container usable for the electromagnetic cooker according to claim 1 or 2. The electromagnetic wave according to claim 3, wherein far-infrared ray-generating material (4) such as tourmaline, ceramics or glass that generates far-infrared ray by heating is mixed into the heat-resistant coating material (3) in powder form. Non-metallic heating container that can be used for cooking devices. A method of manufacturing a non-metallic heating container that can be used in an electromagnetic cooker (IH),
Forming a rough surface on the bottom surface of the heating container (1);
A method for producing a non-metallic heating container usable for an electromagnetic cooker, characterized in that a thermal spray coating (2) of copper or copper alloy is directly formed on the rough surface by a low temperature thermal spraying method. The heat resistant coating material (3) is applied on the thermal spray coating (2) formed on the bottom surface of the heating container (1). Container manufacturing method. An electromagnetic cooker sheet (11) laid between an electromagnetic cooker (IH) and a non-metallic heating container (1),
Thermal spray coating (100 μm to 300 μm in thickness) by spraying copper or copper alloy on the surface in contact with the heating container (1) on the plate-like or cloth-like base material (12) formed of a non-combustible material ( 13) A sheet for an electromagnetic cooker, characterized in that it is formed. The base material (12) is made of a cloth material obtained by crushing ore, heat-melting, processing into a fiber, and woven it, and forming a sprayed coating (13) on one surface of the cloth material by a low temperature spraying method. The sheet for an electromagnetic cooker according to claim 8.

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