JP3758974B2 - Method for producing cooking container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a cooking container, and more particularly to a method for manufacturing a cooking container made of a relatively soft metal having a reinforced bottom surface.
[0002]
[Prior art]
Aluminum is a metal that has many advantages. Aluminum is light, can be easily deep drawn or drop forged, and has good thermal conductivity. Furthermore, aluminum is relatively economical. Because of these qualities, aluminum is commonly used in industry, especially in the manufacture of cooking containers.
[0003]
However, aluminum also has the following problems. That is, since aluminum is relatively soft, there is a problem that its surface is easily scratched. In household applications, this problem is addressed by coating aluminum with a non-stick layer such as polytetrafluoroethylene or with an enamel layer. However, since aluminum is soft as a support, the lifetime of these coatings is limited, and the problem that the surface is easily scratched has not been completely solved. In particular, when used in cooking containers such as pans and pans, the bottom of cooking containers that come into contact with cooking utensils such as gas cookers, electric cookers, cooking tables, desks, etc. are particularly susceptible to scratches. There is a problem.
Moreover, in recent years, electromagnetic cookers that do not easily become dirty and do not use direct fire have become widely used as cooking appliances for cooking, but since aluminum is not a magnetic substance, a cooking container made of aluminum is There is also a problem that it cannot be used for an electromagnetic cooker.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to solve the above-described problems, and the bottom of the cooking container is less likely to be scratched, can be used in an electromagnetic cooker, and can be applied to various bottom shape changes. It is to provide a manufacturing method.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a cooking container manufacturing method comprising: a circle plate forming step of forming a circle plate made of a relatively soft first metal; and a container made from the circle plate. A container body forming step for forming a body, and a plurality of plate materials made of a relatively hard second material and having a plurality of holes are stacked on the bottom surface of the container body so that the positions of the holes overlap. And a first press for causing the first metal on the bottom surface of the container body to protrude into the plurality of holes of the plate body, and pressing the plate material on the bottom surface of the container body. And removing at least the outermost plate material of the plurality of plate materials from the container body, leaving a plate material other than the removed plate material on the bottom surface of the container body, and removing the first metal from the container body container A plate material removing step that protrudes from the bottom surface, and pressing is performed while the plate material left in the plate material removing step is placed on the bottom surface of the container body, so that the first metal that protrudes from the bottom surface of the container body is removed. This is solved by performing the second pressing step of fixing the remaining plate material to the bottom surface of the container body by press-bonding to the plate material.
[0006]
In this way, pressing is performed while the plate material left in the plate material removal step is placed on the bottom surface of the container body, and the first metal protruding from the bottom surface of the container body is pressure-bonded to the remaining plate material. Thus, since the second pressing step of fixing the remaining plate material to the bottom surface of the container body is performed, the bottom surface of the container body made of a relatively soft metal is made of a relatively hard second material. A cooking container with a fixed plate material can be manufactured, and the bottom surface of the cooking container that is easily scratched can be reinforced.
[0007]
A first pressing step in which the plate material is pressed on the bottom surface of the container body to cause the first metal on the bottom surface of the container body to protrude into a plurality of holes in the plate material; A press is performed with the plate material left in the plate material removal step being placed on the bottom surface of the body, and the first metal protruding from the bottom surface of the container is pressure-bonded to the remaining plate material, thereby Since the second pressing step for fixing the plate material to the bottom surface of the container body is performed after the container body forming step for forming the container body from the circle plate, there are various types of the bottom surface of the cooking container. It is possible to fix a plate material having an appropriate area or shape. Moreover, it becomes possible to perform a container body formation process, a 1st press process, and a 2nd press process with the same press apparatus.
[0008]
At this time, the second material is preferably configured to be a material that can be heated by electromagnetic induction. In this way, the plate material fixed to the bottom surface of the container body is made of a material that can be heated by electromagnetic induction, so that the first material constituting the container body is not a material that can be heated by electromagnetic induction. However, it becomes possible to manufacture the cooking container which can be used with an electromagnetic cooker.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The members, arrangements, and the like described below are not intended to limit the present invention and can be variously modified within the scope of the gist of the present invention.
A cooking container refers to a cooking device in the shape of a container, such as a pan, a frying pan, a kettle, or a kettle.
The manufacturing method of the cooking container according to the present embodiment is as follows.
That is, first, a circle plate forming step of forming a circle plate made of aluminum, which is an example of a relatively soft first metal, is performed. In this circle plate forming step, the aluminum plate is punched to form a circle plate made of an aluminum circular plate.
In this example, aluminum is used as the first metal. However, the present invention is not limited to this, and copper, tin, lead, alloys of these metals and aluminum, or the like may be used.
[0010]
Next, a container body forming step for forming the container body 1 from the circle plate by a deep drawing method is performed. In addition, you may perform a container body formation process with other shaping | molding methods, such as the spinning shaping | molding method which forms a container body.
The deep drawing method is to fix the periphery of the circle plate by wrinkle holding, pinch it between the punch that also serves as the inner mold and the knockout ram, and press the punch down, so that the outer die part has the desired outer shape. This is a method for producing a container having a desired outer shape by drawing.
The spinning method is also called spatula drawing, using a spatula drawing lathe, rotating a circularly symmetric mold and a blank on the same axis, and pressing the blank against the mold with a spatula or a roll to make a circular symmetry It is a method of processing into a container-shaped product.
[0011]
Thereafter, a plate material arranging step is performed. Before the plate material arranging step, the punch material 2 shown in FIG. 1 as a plate material is processed in advance. The punch material 2 is processed by performing a punching process for punching a plurality of substantially circular punch holes 3 on a stainless steel plate, which is an example of a relatively hard second material. Here, “punch hole 3” corresponds to “hole” in claim 1, and “punch material 2” corresponds to “plate material” in claim 1.
[0012]
In this embodiment, stainless steel is used as the material of the punch material 2, but other magnetic materials such as iron or iron alloy, for example, steel plates such as carbon steel, cast iron, and mild steel may be used. . As stainless steel, ferritic stainless steel such as SUS430 and SUS434, martensitic stainless steel such as SUS410 and SUS420, and the like can be used.
Also, when using a steel material that has a Curie point or a magnetic transformation point as a punch material and transforms from ferromagnetism to paramagnetism above that temperature, such as 37% nickel / stainless steel, it automatically increases according to the temperature. The temperature-preventing effect can be expressed in the magnetic material itself. Moreover, when not aiming at using for an electromagnetic cooker, you may use platinum, titanium, etc.
The material of the punch material 2 may be either a single material or a laminated material.
[0013]
In the present embodiment, as the punch material 2, as shown in FIG. 1, a punch having a substantially circular punch hole 3 is used. However, the punch material 2 is not limited to this. You may use what provided multiple punch holes, such as a polygon. Further, as shown in FIG. 1, a single plate-like body is used for the punch material 2, but a plurality of divided plate-like bodies may be used.
The punch material 2 is preliminarily stacked with two punch materials 2a and 2b so that the positions of the holes 3a and 3b overlap with each other, and are easily fixed to each other with an adhesive tape or the like. In addition, although the adhesive tape etc. were used in this embodiment, it is not limited to this, You may position the hole 3 with the following method. That is, when punching the punch material 2, by forming at least one small protrusion on one surface and forming a small recess on the other surface to fit the small protrusion, these small protrusions are formed. It is possible to stack a plurality of punch materials 2 by fitting the small recesses and serving as positioning of the holes 3.
[0014]
Then, a plate material arrangement process is performed. First, the formed container body 1 is placed on the base of the press machine so that the bottom surface 1a faces up.
In the case of this embodiment, on the bottom surface 1a of the container body 1, as shown in FIG. 2, two punch materials 2a, 2b are stacked and fixed to each other. In the present embodiment, as an example of stacking a plurality of plate materials, two punch materials 2 are stacked, but three or more sheets may be stacked.
Moreover, in this embodiment, as shown in FIGS. 2 to 5 and 7, as the punch material 2, a disk having a size that covers most of the bottom surface 1 a of the container body 1 is disposed. You may arrange | position the punch material 2 which has an area significantly smaller than the area of the bottom face 1a of the container body 1. FIG. Thus, when the ratio of the area of the bottom face 1a of the container body 1 and the area of the punch material 2 is adjusted, aluminum having good thermal conductivity as the material of the container body 1 and the punch material 2 on the bottom face of the cooking container. Because it is possible to adjust the ratio of the magnetic material stainless steel to the cooking container suitable for the electromagnetic cooker, the cooking container suitable for the gas or electric range, the electromagnetic cooker / gas / electric range Thus, it is possible to manufacture various cooking containers such as cooking containers that are easy to use.
[0015]
Next, a first pressing step is performed. In this step, pressing is performed with the punch materials 2a and 2b placed on the bottom surface 1a of the container body 1, and as shown in FIG. 3, the aluminum on the bottom surface 1a of the container body 1 is placed in each of the plurality of holes 3a and 3b. To form a protrusion 4. At this time, pressing is performed so that the aluminum protrusions 4 on the bottom surface 1a of the container body 1 reach a height between the inner punch material 2a and the outer punch material 2b.
The pressing is performed by drop forging which is hit with a drop hammer or the like in order to at least partially embed the grid in the metal surface. Further, the drop forging may be performed by strongly pressing with a surface, a roll or the like. Further, instead of a drop hammer, an air hammer or a competing hammer may be used.
In addition, the first pressing step may be performed by die forging in which a metal is compressed by a hammer or a press between a pair of upper and lower molds having a gap that becomes a product shape and filled in the mold.
Moreover, you may perform a 1st press process using the press used at the container body formation process.
[0016]
Next, a plate material removing step of removing the outer punch material 2b of the two punch materials from the bottom surface 1a of the container body 1 is performed. As a result, as shown in FIG. 4, the protrusions 4 protruding in the holes 3a and 3b of the two punch materials 2a and 2b protrude from the surface of the inner punch material 2a remaining without being removed. It becomes a state.
[0017]
Next, a second pressing step is performed in which the inner punch material 2a remaining without being removed is placed on the bottom surface 1a of the container body 1 and then pressed again. Thereby, the aluminum protrusion 4 which protruded from the container body 1 bottom face 1a is crushed. As shown in FIG. 6, a portion of the protrusion 4 that protrudes from the punch material 2a forms a blocking portion 5 that spreads and closes the upper portion of the hole 3a. Since this closing portion 5 is pressed, it becomes approximately the same height as the surface of the punch material 2a, but a thin layer covering the punch material 2a is formed around the hole 3a. For this reason, the punch material 2a is fixed to the container body 1 by the closing portions 5 formed for each of the plurality of holes 3a.
Moreover, you may perform a 2nd press process using the press machine used at the container body formation process and the 1st press process.
Then, the manufacturing method of the container for cooking which concerns on this embodiment by performing the washing | cleaning process which wash | cleans the container body 1 with which the punch material 2a was embedded through each said process, an outer surface enamel finishing process, an inner surface processing process, and a bottom finishing process To complete. Further, a curling process, a necking process, a drilling process, a polishing process, a surface process that covers the enamel or fluorocarbon resin layer, and the like may be performed.
[0018]
As shown in FIG. 7, the cooking container 6 manufactured in this way is fixed by partially embedding a stainless steel punch material on the bottom surface of the aluminum container body 1. The cooking container 6 can be subjected to a final finishing process such as a handle or a mouth part installation to complete a final product such as a pan, a pot, a frying pan, or a kettle. It is also possible to manufacture products such as cooking utensils having a heat insulating function by surrounding the outer periphery of the container with a heat insulating material, a pressure cooker having a structure capable of high pressure.
[0019]
【The invention's effect】
As described above, according to the present invention, pressing is performed while the plate material left in the plate material removal step is placed on the bottom surface of the container body, and the first metal protruding from the bottom surface of the container body is left behind. Since the second pressing step of fixing the remaining plate material to the bottom surface of the container body is performed by pressure bonding to the plate material, the bottom surface of the container body made of a relatively soft metal is relatively hard. It becomes possible to manufacture a cooking container in which the plate material made of the second material is fixed, and it is possible to reinforce the bottom surface of the cooking container that is easily scratched.
A first pressing step in which the plate material is pressed on the bottom surface of the container body to cause the first metal on the bottom surface of the container body to protrude into a plurality of holes in the plate material; By pressing the plate material left in the plate material removal step on the bottom surface of the body and pressing the first metal protruding from the bottom surface of the container to the remaining plate material, the remaining material is pressed. Since the second pressing step for fixing the plate material to the bottom surface of the container body is performed after the container body forming step for forming the container body from the circle plate, there are various types of the bottom surface of the cooking container. It is possible to fix a plate material having an appropriate area or shape. Moreover, it becomes possible to perform a container body formation process, a 1st press process, and a 2nd press process with the same press apparatus.
[Brief description of the drawings]
FIG. 1 is a plan view of a plate material used in a method for manufacturing a cooking container according to the present invention.
FIG. 2 is a cross-sectional explanatory view of the container body and the plate material showing a state in which a plurality of plate materials are disposed on the bottom surface of the container body in the plate material arranging step of the cooking container manufacturing method according to the present invention.
FIG. 3 is a cross-sectional explanatory view of the container body and the plate material immediately after performing the first pressing step of the cooking container manufacturing method according to the present invention.
FIG. 4 is a cross-sectional explanatory view of the container body and the plate material immediately after performing the plate material removing step of the cooking container manufacturing method according to the present invention.
FIG. 5 is a cross-sectional explanatory view of the container body and the plate material immediately after performing the second pressing step of the method for manufacturing a cooking container according to the present invention.
6 is an enlarged explanatory view of a cross-sectional explanatory view of FIG. 5;
FIG. 7 is an explanatory view showing a cooking container manufactured by the manufacturing method according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container body 2, 2a, 2b Punch material 3, 3a, 3b Hole 4 Protrusion 5 Closure part 6 Cooking container

Claims (2)

A circle plate forming step of forming a circle plate made of a relatively soft first metal;
A container body forming step of forming a container body from the circle plate;
A plate material arranging step of arranging a plurality of plate materials made of a relatively hard second material on the bottom surface of the container body so as to overlap the positions of the holes,
A first pressing step in which the plate material is pressed on the bottom surface of the container body, and the first metal on the bottom surface of the container body is protruded into a plurality of holes of the plate material;
At least the outermost plate material of the plurality of plate materials is removed from the container body, the plate material other than the removed plate material is left on the bottom surface of the container body, and the first metal is removed from the bottom surface of the container body. A plate material removal process to project,
By pressing the plate material left in the plate material removal step on the bottom surface of the container body and pressing the first metal protruding from the bottom surface of the container body, A method for producing a cooking container, comprising: a second pressing step of fixing the remaining plate material to the bottom surface of the container body. The method for manufacturing a cooking container according to claim 1, wherein the second material is a material that can be heated by electromagnetic induction.

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