JP2000254000A - Heat conductor of carbon fiber reinforced aluminum alloy, manufacture of cooking utensil using same, and cooking utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat conductor which can make effective use of the heat conductivity of a carbon fiber reinforced aluminum alloy(CFRA1) by means of a simple method and to provide a cooking utensil manufacturing method using the heat conductor and a cooking utensil. SOLUTION: This beat conductor of a carbon fiber reinforced aluminum alloy 1 comprises the carbon fiber reinforced aluminum alloy 1 integrally disposed inside an aluminum alloy 2. A support member 5 made of a metallic material compatible with the aluminum alloy 2 is disposed inside a mold 4 for forming the heat conducting part of a cooking utensil, and either the carbon fiber reinforced aluminum alloy 1 or a block 3 with the aluminum alloy 2 surrounding a surface layer of the carbon fiber reinforced aluminum alloy 1 is disposed in the support member 5 so that when the molten aluminum alloy 2 is poured into the mold 4, the carbon fiber reinforced aluminum alloy 1 or the block 3 can be wrapped in a condition in which it is surrounded by the molten aluminum alloy 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat transfer body using a carbon fiber reinforced aluminum alloy (CFRAl), a method of manufacturing a cooking utensil such as a rice cooker using the heat transfer body, and a cooking utensil. About.

[0002]

2. Description of the Related Art Carbon fiber reinforced aluminum alloy (CFR)
Al) is obtained by integrating aluminum (alloy) with carbon fiber under high pressure by a melt forging method, and has superior material properties as compared with aluminum alloys, such as abrasion resistance, thermal conductivity, high-temperature strength, and dimensions. It has stability and the like, and is utilized as a material for various industrial materials or consumer appliances utilizing these characteristics. The aluminum alloy in the present invention does not specify pure aluminum and alloy materials, but covers all existing aluminum alloys.

[0003] The present invention focuses on the excellent thermal conductivity of this carbon fiber reinforced aluminum alloy (CFRAl) (about 150 to 300% as compared with a general aluminum alloy), and considers a method of utilizing this. However, since the carbon fiber reinforced aluminum alloy (CFRAl) itself is manufactured by the above-described molten metal forging method under high pressure, the mold is special, and the intended equipment (industrial, consumer use) is used. ) For example, it is difficult to manufacture a rice cooker that requires low cost at low cost.

[0004]

There have been researches on improving the heat conductivity of the above-mentioned rice cooker to cook rice efficiently, and among them, especially the heat transfer at the bottom of the cooker. As a proposal to improve the properties, a material with excellent thermal conductivity
For example, it has been considered to use copper or an aluminum alloy. In particular, attempts have been made to insert a copper plate into the bottom of an aluminum alloy kettle that can be manufactured in a lightweight and inexpensive manner.However, due to the difference in the coefficient of thermal expansion between the two, cracks occur due to repeated heating and cooling, and they are peeled off. Occurred and could not be commercialized.

[0005] The present inventor has conducted studies on the improvement of the thermal conductivity of a rice cooker, and has found that the above carbon fiber reinforced aluminum alloy (CFRAl) having excellent thermal conductivity.
Is prepared as one block or unit, and a constituent member intended for this is included by a general casting method such as an aluminum die casting method, so that a mold (for molten metal forging) of the entire shape of the constituent member is formed. Even without preparation, it was thought that a product capable of sufficiently exhibiting its excellent thermal conductivity could be manufactured.

[0006] Therefore, when the above carbon fiber reinforced aluminum alloy (CFRAl) is inserted into a mold having a required shape such as a kettle and casting is attempted with iron or another metal, it can be formed into a predetermined shape. Due to poor compatibility with the reinforced aluminum alloy (CFRAl), it is difficult to obtain strong integration, and since the mutual thermal expansion coefficients differ greatly, cracks occur due to repeated heating and cooling. .

[0007] The present invention is to solve the above problems, to provide a heat transfer body that can utilize the thermal conductivity of carbon fiber reinforced aluminum alloy (CFRAl) by a simple method, and to provide a cooking appliance using the heat transfer body An object of the present invention is to provide a production method and a cooking utensil.

[0008]

According to the present invention, in order to achieve the above object, a carbon fiber reinforced aluminum alloy heat exchanger according to the present invention has a structure in which carbon fiber reinforced aluminum is integrally disposed inside an aluminum alloy. It was taken.

In order to achieve the above object, a method of manufacturing a cooking appliance using a carbon fiber reinforced aluminum alloy heat transfer material according to the present invention provides a method of manufacturing a cooking appliance, comprising: A support member made of a metal material having good solubility is arranged, a block in which the aluminum alloy is bent on the surface layer of the carbon fiber reinforced aluminum alloy or the carbon fiber reinforced aluminum alloy is arranged on the support member, and the molten aluminum alloy is used as a mold. Means was adopted in which, when poured, the carbon fiber reinforced aluminum alloy or the block could be included in a state of being surrounded by the molten aluminum alloy.

[0010] In the production method of the present invention, it is preferable that the heat conducting portion of the cooking utensil is a bottom portion of a rice cooker.

According to the present invention, there is provided a cooking device using a carbon fiber reinforced aluminum alloy heat transfer material, wherein the carbon fiber reinforced aluminum alloy is provided inside a heat conducting portion of the cooking device made of an aluminum alloy. A measure was taken to incorporate the alloy integrally.

In the present invention, it is preferable that the heat conducting portion of the cooking utensil is the bottom of the rice cooker.

[0013]

DETAILED DESCRIPTION OF THE INVENTION According to the carbon fiber reinforced aluminum alloy heat exchanger of the present invention, as shown in FIG. 1, carbon fiber reinforced aluminum (CFRAl) 1 is replaced with an aluminum alloy 2 having excellent compatibility with the carbon fiber reinforced aluminum (CFRAl). Can be formed into a strongly integrated block 3, and when this block is used as a heat conductor of various industrial and consumer equipment, the equipment component material, for example, aluminum alloy Can be strengthened, and the excellent thermal conductivity can be sufficiently exhibited.

According to the method of manufacturing a cooking appliance using a carbon fiber reinforced aluminum alloy heat conductor, as shown in FIG. 2, carbon fiber reinforced aluminum (CFRAl) is used to utilize excellent thermal conductivity. When used as a component of a cooking utensil, there is no need to manufacture the component using carbon fiber reinforced aluminum (CFRAl) itself by a smelting forging method that is expensive to manufacture, and this carbon fiber reinforced aluminum (CFRAl) is used as an aluminum alloy. 2 and 3 so that it can be handled as one block 3 or a unit, and as shown in FIGS.
And carbon fiber reinforced aluminum (CF)
(RAl) 1 or a block 3 is used to manufacture a cooker having excellent thermal conductivity, for example, a cooker cooker, etc. by a simple casting method such as a general die casting method or a low pressure casting method. it can.

[0015] Further, the cooking utensil using the carbon fiber reinforced aluminum alloy heat transfer material according to the present invention is a heat conduction part of a cooking utensil made of an aluminum alloy, for example, a carbon fiber inside a cooking pot bottom of a rice cooker. By incorporating the reinforced aluminum alloy 1 integrally, the carbon fiber reinforced aluminum alloy (CFRAl) is easily integrated firmly with the aluminum alloy constituting the furnace, and cracks and peeling due to the difference in the coefficient of thermal expansion between the two. Without causing a situation, it is possible to make use of sufficiently excellent thermal conductivity, and in the case of the bottom of a rice cooker (electric or gas rice cooker), heat is not diffused and is strong from the bottom of the cooker. By causing convection, the rice is cooked deliciously while standing.

Such a cooking utensil can be applied not only to a rice cooker, but also to a cooking dish, a water heater, a boiler, etc., which requires heating. In any case, the compatibility with the aluminum alloy is high. The excellent thermal conductivity of the carbon fiber reinforced aluminum alloy 1 can be utilized without causing problems such as cracks and peeling in the constituent members.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a heat exchanger of a carbon fiber reinforced aluminum alloy according to the present invention; FIG. . FIG. 1 is a vertical sectional side view of one block of a carbon fiber reinforced aluminum alloy heat conductor. In FIG. 1, 1 is a carbon fiber reinforced aluminum alloy (CFRAl)
Since it is manufactured by a molten metal forging method and its technology is well-known, a detailed description thereof will be omitted here.
Reference numeral 2 denotes an aluminum alloy, and the carbon fiber reinforced aluminum alloy (CFRAl) is integrally disposed and included in the aluminum alloy 2 to form one unit or block 3. Here, it does not matter whether the carbon fibers of the carbon fiber reinforced aluminum alloy (CFRAl) are pitch-based or PAN-based, but it is preferable that the carbon fibers be pitch-based in order to obtain high heat conductivity.

FIG. 2 is a schematic cross-sectional view showing an example of a method for manufacturing a cooking utensil using a carbon fiber reinforced aluminum alloy heat conductor, here, a cooking rice cooker. This manufacturing method is based on an aluminum die-casting method. A frame material made of a metal material having good compatibility with an aluminum alloy, in this case, an aluminum alloy is provided inside a mold 4 which forms a kettle which is a heat conducting portion of a cooking utensil. The support member 5 is placed and placed on the bottom of the mold 4. The support member 5 holds the carbon fiber reinforced aluminum alloy 1. When the molten aluminum alloy is poured into the mold 4, the carbon fiber reinforced aluminum alloy 1 is removed. It was made possible to enclose in a state of being surrounded by the molten aluminum alloy.

At the time of injection of the molten aluminum alloy, the support member 5 is temporarily melted because it is an aluminum alloy, and the carbon fiber reinforced aluminum alloy 1 is floated in a hollow having a thickness of the furnace. Become a part.
In addition, as a manufacturing method, a low pressure casting method and a gravity casting method can be used in addition to the aluminum die casting method.

FIG. 3 shows a similar manufacturing method. In this case, instead of the carbon fiber reinforced aluminum alloy 1, a block 3 in which the surface of the carbon fiber reinforced aluminum alloy 1 is surrounded by an aluminum alloy is used. This is called mold 4
The block 3 is placed on a support member 5 made of a trapezoidal aluminum alloy placed on the bottom of the block 3 so that the upper surface of the block 3 directly constitutes the upper surface of the bottom of the kettle.

Also in this case, when the molten aluminum alloy is poured into the mold 4, the block 3 is integrated with the molten aluminum alloy so as to surround the periphery (excluding the upper surface), and constitutes a part of the bottom of the kettle. I do. At this time, since the support member 5 is made of an aluminum alloy, the support member 5 dissolves into the injected molten aluminum alloy to constitute a part of the main body of the furnace.

According to the above-described manufacturing method, a rice cooker having a heat conductive portion of a cooking utensil made of an aluminum alloy, that is, a rice cooker in which a carbon fiber reinforced aluminum alloy 1 is integrally incorporated at the bottom is obtained.

The above-described frame-shaped or trapezoid-shaped support member 5 is used.
Is used to make the position of the carbon fiber reinforced aluminum alloy 1 or the block 3 fall within a predetermined position of the furnace, so that these carbon fiber reinforced aluminum alloy 1 or the block 3 It may be configured so as to be located in a thick hollow, or may be configured so that a part thereof is exposed on the upper surface of the bottom of the kettle.

[0024]

According to the carbon fiber reinforced aluminum alloy heat exchanger of the present invention, carbon fiber reinforced aluminum (CFR)
When Al) is used as a heat conductor for various industrial and consumer appliances, it can be integrated with the components of the appliance, for example, an aluminum alloy, so that its excellent heat conduction can be achieved. There is an advantage that the property can be fully exhibited. Further, according to the method for manufacturing a cooking utensil of the present invention, carbon fiber reinforced aluminum (CFRAl) is surrounded and bent by an aluminum alloy so that it can be handled as one block or unit. There is no necessity to manufacture the constituent members using carbon fiber reinforced aluminum (CFRAl) itself, and only by holding the carbon fiber reinforced aluminum (CFRAl) or the block through the supporting member in the target mold, a general die casting method is used. By using a simple casting method such as a casting method or a low-pressure casting method, cooking utensils having excellent thermal conductivity, for example, cookers for rice cookers and the like can be easily manufactured at low cost.

Further, in the cooking utensil using the carbon fiber reinforced aluminum alloy heat transfer material according to the present invention, the carbon fiber reinforced aluminum alloy is easily integrated firmly with the aluminum alloy constituting the kettle, and the thermal expansion of both components is enhanced. It can be used for a long period of time without causing cracks and peeling due to the difference in rate, and it can be used for a long time. In addition, there is an advantage that rice can be cooked deliciously while standing rice by generating strong convection from the bottom of the kettle.

Such cooking utensils can be applied not only to rice cookers, but also to cooking dishes, water heaters, boiler pans, etc., which require heating, and various heat transfer materials in various industrial equipment. Is applicable to
In any case, due to the good compatibility with the aluminum alloy, the excellent thermal conductivity of the carbon fiber reinforced aluminum alloy can be utilized without causing problems such as cracks and peeling in the constituent members.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional side view of a carbon fiber reinforced aluminum alloy heat transfer body of the present invention.

FIG. 2 is a schematic vertical sectional side view showing an example of a method for manufacturing a cooking appliance using the carbon fiber reinforced aluminum alloy heat conductor of the present invention.

FIG. 3 is a schematic vertical sectional side view showing another example of the method for manufacturing a cooking appliance using the carbon fiber reinforced aluminum alloy heat conductor of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carbon fiber reinforced aluminum alloy 2 Aluminum alloy 3 Block 4 Mold 5 Supporting member

Continuation of the front page (72) Inventor Tetsuo Takimoto 3-6-1, Bingo-cho, Chuo-ku, Osaka-shi, Osaka Prefecture F-term in Osaka Gas Chemical Co., Ltd. (reference) 4B055 AA02 AA24 BA13 BA15 CA02 CA09 CB03 FB02 FC08

Claims (5)

[Claims] 1. A carbon fiber reinforced aluminum alloy heat transfer body in which a carbon fiber reinforced aluminum alloy is integrally disposed inside an aluminum alloy. 2. A supporting member made of a metal material compatible with an aluminum alloy is disposed inside a mold forming a heat conducting portion of a cooking utensil, and the supporting member is made of a carbon fiber reinforced aluminum alloy or a carbon fiber reinforced aluminum. Arrange a block in which the aluminum alloy is bent on the surface layer of the alloy, so that when the molten aluminum alloy is poured into the mold, the carbon fiber reinforced aluminum alloy or the block can be included in a state of being bent with the molten aluminum alloy. A method of manufacturing a cooking appliance using a heat transfer body made of a carbon fiber reinforced aluminum alloy. 3. The method of manufacturing a cooking appliance using a carbon fiber reinforced aluminum alloy heat conductor according to claim 2, wherein the heat conducting portion of the cooking appliance is a bottom portion of a rice cooker. 4. A cooking appliance using a carbon fiber reinforced aluminum alloy heat transfer body in which a carbon fiber reinforced aluminum alloy is integrally incorporated in a heat conducting portion of the cooking appliance made of an aluminum alloy. 5. The method for manufacturing a cooking appliance using a carbon fiber reinforced aluminum alloy heat transfer body according to claim 3, wherein the heat conducting portion of the cooking appliance is a bottom portion of a rice cooker.