JPH02216788A - Pots for electromagnetic cooker and manufacture thereof - Google Patents

Abstract

PURPOSE:To make it possible to use a pot made of Al or Cu with no difficulty by forming a recess at the bottom surface of the pot body made of Al or Cu, and welding a clad material plate incorporating Fe and Al or Cu protruding a little from the recess. CONSTITUTION:At the bottom surface of a formed pot body 1 made of Al or Cu, a recess 3 with the diameter smaller than that of the bottom surface is formed, and its depth is made 1-2mm. A clad material plate 4 with the diameter same as the recess 3 is made of a complex plate of iron and aluminum, for example, and it is geared to the recess 3 of the bottom surface of the pot body 1 positioning its iron part 6 at the outside to the inner side of the Al or the Cu 5. In this case, the Al or the Cu part 5 inside the plate 4 is made to protrude from the depth of the recess 3. Then, the pot bottom surface and the plate 4 surface are closely contacted perfectly while applying a pressure to the upper side of the plate 4 by a pressure machine a, and an Al-welding 7 is applied to the connecting part of the pot body 1 and the clad material plate 4.

Description

[Detailed Description of the Invention] 3-11 Objective of the Invention 3-1-1. INDUSTRIAL APPLICATION FIELD The present invention relates to pots used in electromagnetic cookers and methods of manufacturing the same.

Note that these pots include a kettle, etc.

3-1-2. BACKGROUND OF THE INVENTION An electromagnetic cooker is an electric appliance that heats metal attached to a magnet to cook food. Therefore, conventional pots made of aluminum or copper could not be used as they are.

In an attempt to solve this problem, the following manufacturing method has been considered, but it still has drawbacks in terms of practicality.

The first method is to attach an iron plate to the bottom of an aluminum or copper pot. However, this method has the drawback that the attachment does not go well, and the attachment plate may become distorted or easily peel off.

The second method is to spray or paint a paint mixed with iron powder on the bottom of the pot. However, this method has the disadvantage that the paint peels off within a short period of time.

Thirdly, there is a method of welding a mixture of aluminum powder and iron powder to the bottom of the pot in a multi-stage concave groove that does not penetrate inside. However, with this method, the mixed materials cracked during the process, making it impossible to commercialize the product.

3-1-3. Problems to be Solved by the Invention Therefore, the present invention has developed a method for producing an electromagnetic cooker in order to utilize the advantages of an aluminum or copper pot as a cooker, that is, to shorten the cooking time due to its good heat conductivity. The object of the present invention is to provide a new pot made of the above-mentioned materials.

3-20 Structure of the invention 3-2-1. Means for Solving the Problem A recess with a diameter smaller than the diameter of the bottom part is formed in the bottom part of an aluminum or copper pot body, and the aluminum or copper part of the aluminum clad material or copper clad material is placed inside and made of stainless steel or iron. The inner part of the cladding material is fitted into the recessed part of the pot bottom with the outer part facing outward, and the inner part of the cladding material is slightly protruded from the recessed part during this fitting, and the upper surface of the cladding material is pressurized by a pressure machine while the pot body and cladding are connected. This is a manufacturing method in which welding is performed at the joint with the material.

3-2-2. Example (1) A concave portion (3) having a diameter smaller than the diameter of the bottom portion is formed in the bottom portion (2) of a molded aluminum or copper pot body (1). The depth of this recess (3) is 1.5 to 2 mm. (See Figure 1) (2) Cladding material (4) with the same diameter as this recess (3)
Prepare. This cladding material (4) is a composite plate of stainless steel + aluminum or iron + aluminum in the case of an aluminum cladding material, and a composite plate of stainless steel + copper or iron + copper in the case of a copper cladding material. (Stainless steel should have a small amount of nickel or should not contain nickel.) (3) This cladding material (4) should be placed with the aluminum or copper part (5) on the inside and the stainless steel or iron part (6) on the inside. It fits into the bottom recess (3) of the pot body (1) so that it faces outward. At the time of this fitting, the aluminum or copper portion (5) inside the cladding material (4) is made visible to protrude from the depth of the recess (3). Therefore, in order to achieve such a configuration, the dimensional relationship between the thickness of the cladding material (4) and the depth of the pot bottom recess (3) is considered.

(The reason for this is the degree of adhesion due to welding, which will be described later.) This makes it stronger and has better thermal conductivity.

(4) While applying pressure with the pressurizer (a) to the upper surface of the cladding material (4) fitted in the pot bottom recess (3), argon explosion welding is applied to the joint between the pot body and the cladding material (Second (See figure) The reason for welding under pressure is that if there is a gap between the bottom of the pot and the clad plate, heat conduction between the pot and the clad plate will be good when the pot is placed on an induction cooktop. Because it won't work.

(5) Finally, the weld marks are polished by polishing.

3-31 Effects of the Invention Since the present invention has such a configuration, aluminum or copper pots and kettles that could not be used in electromagnetic cookers can be used without problems. As a result, the range of use of induction cookers has become extremely wide, and the manufacturing cost has become relatively cheap, as the main parts use expensive rad materials to the minimum extent necessary. The effects are enormous.

[Brief explanation of the drawing]

The drawings show the manufacturing process of the present invention; FIG. 1 is a front sectional view of the pot body, FIG. 2 is a front sectional view of the main part during manufacturing, and FIG. 3 is a bottom view of the finished product. Patent Applicant Ikeda Co., Ltd. Procedural Amendment (Voluntary) 6. Contents of the amendment dated February 26, 1990 as attached to the specification. (There is no change in the content except for the matters stated in the column to be amended by Mr. Bunki Tada, Commissioner of the Japan Patent Office. 1. As shown in the appendix of Japanese Patent Application No. 1-37962, numeral 7 has been added to Figures 2 and 3. 2. Name of the invention
The relationship between the phrase Izo Umbrella and Electromagnetic Cooking “Skillful tins and their manufacturing method 3, the case of the person making the amendment”

Claims (2)

[Claims] (1) A cladding material with the stainless steel or iron part on the outside and the aluminum or copper part on the inside is welded to the recess formed in the bottom of the aluminum or copper pot body, and the aluminum or copper part of this cladding material is A pot for an electromagnetic cooker, characterized in that the pot slightly protrudes from the recess. (2) A recess with a diameter smaller than the diameter of the bottom is formed in the bottom of the aluminum or copper pot body, and the aluminum or copper part of the aluminum clad material or copper clad material is placed inside and the stainless steel or iron part is placed outside. The inner part of the clad material slightly protrudes from the recess at the time of this fitting, and the pot body and the clad material are joined while applying pressure to the top surface of the clad material using a pressure machine. A method for manufacturing pots for an electromagnetic cooker, characterized in that the parts are welded.