JP3761219B2 - Manufacturing method of pan for electromagnetic cooker - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a method of manufacturing a pan for an electromagnetic cooker, more specifically, an electromagnetic cooker in which a multi-layered material in which an aluminum plate is inseparably joined to the bottom surface of the pan body , and a stainless steel plate is inseparably joined to the bottom surface is firmly attached without fear of dropping off. The present invention relates to a method of manufacturing a pot for pots, a frying pan, and a shallow pan (hereinafter simply referred to as a pan).
[0002]
[Prior art]
An electromagnetic cooker, also called an electromagnetic stove, heats the pan by placing a pan with a magnetic material at least at the bottom on it and heating it, so there is no flame and air is not dirty. Since the loss is relatively small, it is used favorably in ordinary homes including apartment houses.
[0003]
As is well known, the material that generates heat by this electromagnetic cooker must be a magnetic material. At first, iron pots that were ferromagnetic materials or pans that had been enameled with iron were used. However, in recent years, for example, Japanese Patent Application Laid-Open No. 59-6019 has been disadvantageous in that sufficient heat generation is obtained at the portion where the magnetic force from the surface acts, but the thermal conductivity is poor and the pan itself is heavy and rusts. As seen in the official gazette, an aluminum pan with a thermal spray coating of a magnetic material on the bottom surface, as seen in Japanese Utility Model Publication Nos. 59-27730 and 59-73234, made of aluminum with a magnetic material joined to the bottom surface. Pans made of magnetic materials that are in contact with electromagnetic cookers, such as pots, have come to be widely used.
[0004]
[Problems to be solved by the invention]
However, the aluminum pan with the thermal spray coating of magnetic material (iron powder) on the bottom surface has a problem that the bottom surface is rough and the surface of the electromagnetic cooker can be scratched. Has the difficulty of doing. On the other hand, an aluminum pan with a magnetic material bonded to the bottom has a small gap between the magnetic material and aluminum because it is difficult to completely bond the magnetic material and aluminum. There is an inconvenience that fine vibration noise is generated during use.
[0005]
The present invention was made for the purpose of eliminating the pot drawbacks and disadvantages of conventional electromagnetic cooker described above, lightweight thermal efficiency is further exothermic efficient aluminum pan by an electromagnetic cooker A manufacturing method is provided.
[0006]
[Means for Solving the Problems]
This invention solved the said subject by casting and integrating the multilayer material which joined the aluminum plate and the stainless steel plate inseparably to the bottom face part of the pan made from cast aluminum. That method of manufacturing an electromagnetic cooker pot of the present invention includes: a mold forming a casting mold space of the bottom portion of the pot, a split mold consisting of a mold to form a casting mold space of the peripheral wall of the pot use, firstly, remove the mold that forms the casting mold space of the peripheral wall of the pot, in a central portion of the casting mold space of the mold that forms the casting mold space of the bottom portion of the pot, the upper surface aluminum plate, after stainless steel plate on the lower surface is allowed to stand a multilayer material having a knife edge-like outer peripheral inclined inwardly toward the lower side from inseparably joined upper surface, the mold was removed to the original position After joining, the molten aluminum is injected, and the knife-edge outer periphery of the multilayer material is injected into the casting mold space of the peripheral wall portion of the pan by the edge on the bottom side of the pan body. wraps, of the multi-layer material aluminum Causes the pan body and welding of cast aluminum outer peripheral portion of the Um plate brought into close contact with cast aluminum edge slope portion of the stainless steel plate, which is characterized by causing integrating the multilayered material on a bottom surface of the pan body of cast aluminum It is.
[0007]
As a stainless steel plate for forming a multilayer material with an aluminum plate, stainless steel 430 steel or NAR160 stainless steel is suitable, and the aluminum plate and the stainless steel plate can be integrated by a joining method called explosion welding. desirable. The thickness of the multilayer material is appropriately determined according to the thickness of the peripheral wall portion of the pan body, but the aluminum portion serving as the upper surface is about 2 to 3 mm, and the stainless steel portion serving as the lower surface is about 0.5 to 1 mm. Is about 2.5 to 4 mm.
[0008]
The shape of the multi-layered material may be a mere flat shape, but in consideration of prevention of deformation of the bottom surface due to magnetic force and stability of the pan bottom on the electromagnetic cooker, a recess or unevenness is formed in the central portion of the bottom surface. It is desirable to keep it. The depression is formed by forming a knife-edge-shaped outer peripheral portion of the multilayer material into a shape like a push button mark refracted downward, and forming a step portion on the outer peripheral portion of the upper surface of the aluminum portion. In other words, at the time of carrying out the above-described manufacturing method, the knife-edge outer periphery of the multilayer material can be wrapped with the edge on the bottom side of the cast aluminum. Then, for example, a casting mold space is formed so that an annular gap is formed between the end face of the bottom side of the cast aluminum and the stepped portion at the time of casting. After casting, the annular gap is formed by aluminum welding. If filled, the casting pan body and the multilayer material can be integrated more firmly.
[0009]
The casting method is not particularly limited, and a conventional casting method such as a sand mold, a mold gravity method, and a mold die casting method may be used. Moreover, even if the above-described annular gap is not necessarily formed, the multilayer material can be firmly integrated by aluminum casting.
[0010]
[Action]
The bottom part of the pan body made of cast aluminum is composed of a multi-layer material in which an aluminum plate is inseparably joined to the upper surface and a stainless steel plate is inseparably joined to the lower surface. When the vessel is energized, the stainless steel plate generates heat and efficiently conducts the heat to the upper aluminum plate. Furthermore, the pan body is made of cast aluminum, and the outer periphery of the multi-layered material wrapped around the outer periphery of the bottom surface of the pan main body has a knife edge shape, so the contact area between the pan main body and the multi-layered material In addition, the knife-edge outer periphery of the multilayer material is inclined inward from the upper surface side to the lower surface side, and the aluminum plate part of the multilayer material is integrated with the pan body, so the heat to the pan body In addition to improving the conduction effect, the multi-layered material and the pan body are firmly coupled to eliminate the fear of water leakage from the bottom of the pan.
[0011]
【Example】
FIG. 1 is a partial sectional front view of an electromagnetic cooker pan according to the present invention, and FIG. 2 is an enlarged sectional view of a main part of the present invention. Pan 2 is a pan body constituting the peripheral wall of the pan, 3 is a bottom portion of the pan, the pan body 2 is cast aluminum, and the bottom portion 3 is inseparable from an aluminum plate 4A on the top and a stainless steel plate 4B on the bottom. It is formed with the multilayer material 4 joined to the.
[0012]
As shown in FIGS. 1 and 2, the pan 1 of the present invention is inseparably provided with an aluminum plate 4 </ b> A on the top surface and an NAR160 stainless steel plate 4 </ b> B on the bottom surface of the pan body 2 whose peripheral wall is formed of cast aluminum. The joined multilayer material 4 is fixedly configured. And the said multilayer material 4 is equipped with the outer peripheral part 5 of the knife edge shape inclined inward toward the lower surface side from the upper surface side. In the present embodiment, the multilayer material 4 has a thickness of the aluminum plate 4A as the upper surface of 2 mm, a thickness of the stainless steel plate 4B as the lower surface of 0.6 mm, and a total thickness of about 2.6 mm. Are inseparably joined by means of explosive pressure contact, and the cross-sectional shape in the thickness direction at the center is a hollow shape like a push button mark in which the outer peripheral part 5 in the shape of a knife edge is refracted downward. Yes.
[0013]
As shown in FIG. 2, the multilayer material 4 forming the bottom surface portion 3 of the pan 1 is shaped like a knife edge in the portion of the edge portion 2A on the bottom surface side of the pan body 2 formed by casting. It is sandwiched and integrated so as to wrap around the outer peripheral portion 5, and thus the lower layer of the bottom surface portion 3 is a pan 1 for an electromagnetic cooker composed of the stainless steel plate 4 </ b> B of the multilayer material 4.
[0014]
Next, the manufacturing method of the above-described pan 1 for the electromagnetic cooker according to the present invention will be described in detail. First, as shown in FIG. 3, a model 10 having the same shape as the finished pan of the desired shape is formed. As shown, a bottom surface portion 3 having a knife edge-shaped outer peripheral portion 5 in which an aluminum plate 4A is inseparably joined to the upper surface and a stainless steel plate 4B is inseparably bonded to the lower surface and is inclined inwardly from the upper surface side toward the lower surface side; A multilayer material 4 is prepared. An annular groove 10 </ b> A is provided at the position of the upper surface step portion 6 of the multilayer material 4 on the inner peripheral surface side of the bottom surface portion of the model 10. Subsequently, the casting mold of the model 10 is formed by the lower mold 11 and the upper mold 12 using the model 10. At this time, as shown in FIG. 4, to form a casting mold space 13B of the casting space 13A, the pot of the model 10 having upper mold 12 peripheral wall 10C of the pot bottom portion 10B of the model 10 with under the mold 11 .
[0015]
Next, as shown in FIG. 6, the upper mold 12 is once removed, and the above-mentioned multilayer material 4 is allowed to stand in the center of the casting space 13A of the lower mold 11, and then the upper mold 12 is joined to the original position. Then, the annular projection 12A of the upper mold 12 is located at the step portion 6 of the multilayer material 4, and the mold is obtained in which the position of the multilayer material 4 is ensured in an immobile state.
[0016]
Then, as shown in FIG. 7, when molten aluminum 15 is poured from the gate 14, the knife-edge-shaped outer peripheral portion 5 of the multilayer material 4 is an edge portion on the bottom surface side of the pan body 2 formed of molten aluminum. 2A, and the outer peripheral portions 16 and 16 of the aluminum plate 4A of the multilayer material 4 that becomes the bottom surface portion 3 as shown in FIG. 2 are welded to the edge portion 2A on the bottom surface side of the pan body 2, and at the same time, the stainless steel plate 4B When the edge slope portion 17 is in close contact with the molten aluminum 15 and the cast aluminum is taken out from the mold after the molten aluminum 15 is solidified, the bottom surface portion 3 of the cast aluminum pan body 2 is formed with the multilayer material 4. The pot becomes the same shape as the model 10, and the portion corresponding to the annular groove 10A of the remaining model 10 is filled with aluminum 18 by aluminum welding means and finished. , It is possible to obtain a pot 1 of the electromagnetic cooker of the present invention shown in FIG.
[0017]
In the above embodiment, the lower mold 11 forms the casting space 13A of the bottom surface portion 10B of the pan of the model 10, and the upper mold 12 forms the casting mold space 13B of the peripheral wall portion 10C of the pan of the model 10. As shown in FIG. 8, the upper mold 12 forms the outer surface of the model 10 and the lower mold 11 forms the inner surface to form a pan mold, and the multilayer material 4 is placed and cast in the bottom space. Of course, it is also good.
[0018]
Further, the multilayer material 4 that forms the bottom surface portion 3 of the pot 1 has a ring-shaped uneven portion 20 as shown in FIGS. 9 and 10 or a petal-shaped uneven portion as shown in FIG. If 21 or the like is formed, it is effective for preventing deformation of the multilayer material 4 due to heat and magnetic force during use. Of course, as described above, the present invention can be applied to the ordinary deep pan, the frying pan, and the dish-shaped shallow pan.
[0019]
【The invention's effect】
Thus, the pan 1 for an electromagnetic cooker of the present invention is inseparably joined to the bottom surface portion 3 of the pan body 2 formed of cast aluminum, with the aluminum plate 4A on the top surface and the stainless steel plate 4B on the bottom surface, and from the top surface side. A multilayer material 4 having a knife edge-shaped outer peripheral portion 5 inclined inwardly toward the lower surface side is integrally mounted. In particular, the bottom surface portion 3 is made of an aluminum plate on a stainless steel plate 4B on the lower surface. 4A is composed of a multilayer material 4 that is inseparably joined in advance, and is sandwiched by the edge 2A on the bottom side of the aluminum pan body 2 formed by casting at the outer periphery 5 of the knife edge shape, and an aluminum plate 4A Since the outer peripheral portion of the pan is welded to the bottom edge 2A of the pan body 2, the heat from the stainless steel plate 4B generated by the electromagnetic cooker can be efficiently and And it can be conducted to the pan body 2.
[0020]
Moreover, since the knife edge-shaped outer peripheral portion 5 of the multi-layered material 4 constituting the bottom surface portion 3 is integrated with the edge portion 2A on the bottom surface side of the pan body 2, it is separated from the pan body 2 by an impact during use. There is no fear that the layer material 4 will come off, and since most of the pan 1 is made of aluminum, it is a lightweight and inexpensive pan for an electromagnetic cooker.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional front view of a pan for an electromagnetic cooker according to the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of FIG.
FIG. 3 is a cross-sectional view illustrating a mold model for manufacturing a pan for an electromagnetic cooker according to the present invention.
4 is a cross-sectional view showing a model mold of FIG. 3; FIG.
FIG. 5 is a cross-sectional view of a multilayer material applied to the bottom surface of a pan for an electromagnetic cooker according to the present invention.
FIG. 6 is a cross-sectional view showing a method for casting a pan for an electromagnetic cooker according to the present invention.
FIG. 7 is a cross-sectional view showing a casting state of a pan for an electromagnetic cooker according to the present invention.
FIG. 8 is a cross-sectional view showing another casting state of the pan for the electromagnetic cooker according to the present invention.
FIG. 9 is a plan view of a multilayer material having an uneven portion formed thereon.
10 is a cross-sectional view of FIG.
FIG. 11 is a partially omitted plan view showing another embodiment of a multilayer material having an uneven portion.
[Explanation of symbols]
1. 1. Pot for an electromagnetic cooker Pan body 2A. 2. The bottom edge of the pan body Bottom part of pan 4 Multi-layer material 4A. Aluminum plate 4B. Stainless steel plate 5. 5. Knife edge-shaped outer periphery Step part 10. Mold model 11. Lower mold 12. Upper mold

Claims (1)

Using a split mold consisting of a mold that forms the casting mold space of the bottom part of the pan and a mold that forms the casting mold space of the peripheral wall part of the pan, first, the casting mold of the peripheral wall part of the pan remove the molds to form a space, in the center of the casting mold space of the mold that forms the casting mold space of the bottom portion of the pot, an aluminum plate on the upper surface, a stainless steel sheet is inseparably bonded to the lower surface the upper surface After then standing for a multilayer material having a knife edge-like outer peripheral inclined inwardly toward the lower surface side, which is joined to the mold was removed to the original position, accordingly from the double by injecting molten aluminum wrapping the bottom side of the edge of the pan body formed by molten aluminum injected with knife edge-like outer periphery of the layer material into the casting mold space of the peripheral wall of the pot, cast aluminum outer peripheral portion of the aluminum plate of the multi-layer material Nobemoto And with fusing brought into close contact with cast aluminum edge slope portion of the stainless steel plate, the manufacturing method of the electromagnetic cooker pot, characterized in that make integral the multilayered material on a bottom surface of the pan body of cast aluminum.

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