KR20120131556A

KR20120131556A - mold apparatus for forming cooking vessel and manufacture method using the same

Info

Publication number: KR20120131556A
Application number: KR1020110049809A
Authority: KR
Inventors: 박문원
Original assignee: 박문원
Priority date: 2011-05-25
Filing date: 2011-05-25
Publication date: 2012-12-05

Abstract

PURPOSE: A gravity casting-type cooking container mold and a manufacturing method of cooking containers using the cooking container mold are provided to enhance durability by preventing degradation or extinction of magnetism. CONSTITUTION: A gravity casting-type cooking container mold(1) comprises an upper mold(2) and a lower mold(3). The upper mold includes a molten metal inlet(23), and a magnetic heat plate(4) is installed at the lower mold. In the upper mold, a plurality of magnetic medias(24) is installed. The magnetic medias attach the magnetic heat plate to the inside of the upper mold. On the outside of the upper mold, electromagnetic modules(25) which are combined with each magnetic media are installed. The electromagnetic modules are electrically connected to a control box which supplies the power. On the upper surface of the magnetic heat plate, a plurality of position setting pieces(42) is installed. The position setting pieces installs the magnetic heating plate on the bottom surface of the cooking container(5).

Description

Mold apparatus for forming cooking vessel and manufacture method using the same}

The present invention relates to a cooking vessel manufacturing mold and a cooking vessel manufacturing method, and more particularly, to a gravity casting cooking vessel manufacturing mold and a cooking vessel manufacturing method using the gravity casting cooking vessel manufacturing mold.

In general, cooking vessels are used to cook food by induction heating and / or flame heating, such as rice cookers, pots, and frying pans.

Here, an electronic cooker such as an induction range used for induction heating has a coil for generating a magnetic field when a high voltage is applied to the induction heating, and the induction stove induces a magnetic field when a high voltage is applied to the coil. In this case, the metal body in the region affected by the magnetic field is heated. Since the electronic cooker does not generate any flame or harmful gas, there is no risk of fire, and there is no carbon monoxide that is inevitably generated when gas is used as a heat source. have. In addition, the electronic cooker does not cause burns even when the grille is touched while the container is being heated.There is no spark, so there is no risk of fire or explosion, and the burner does not burn when body parts come into contact with the grille while the power is supplied. It has a merit and is being used a lot recently.

In this case, the cooking vessel used in the electronic cooking device such as an induction stove is limited to a magnetic cooking container having a high magnetic field sensitivity. The magnetic material such as iron contained in the cooking container is heavier than the nonmagnetic material such as aluminum or aluminum alloy. Has a fundamental disadvantage.

On the other hand, a cooking container made of a nonmagnetic material such as aluminum or an aluminum alloy has excellent moldability and thermal conductivity, and thus is widely used for flame heating cooking. However, such nonmagnetic cooking containers have a low magnetic field sensitivity and cannot be heated by an induction stove.

In order to solve this problem, a cooking vessel manufactured by spraying a magnetic body or forming a plating of a magnetic body on a bottom surface of a nonmagnetic container body has been proposed. However, such a cooking container has a problem that the sprayed or plated magnetic material is easily peeled off.

Alternatively, a cooking vessel prepared by drilling a hole in a magnetic heating plate and having a projection fitted into the hole in a nonmagnetic container body corresponding thereto, and then pressing them is proposed. Such conventional cooking vessels are more durable than conventional cooking vessels, but peeling phenomena due to the difference in shrinkage between different metals still exist.

Meanwhile, in order to solve the above problems, Patent No. 611646 (August 11, 2006), registered with the Korean Intellectual Property Office, discloses that a metal plate body (magnetic heating plate) exposed to the bottom of the cooking vessel is formed during the casting molding of the cooking vessel. The induction stove cooking vessel and its manufacturing method, which are placed inside the mold for preparing the cooking vessel with metal flakes and are cast, have been limited.

However, the Republic of Korea Patent No. 611646 arranges a plurality of the non-ferrous metal flakes in the mold during the manufacturing process to expose a metal plate (magnetic heating plate) to the bottom surface of the cooking vessel, and the metal plate body to be horizontal on the non-ferrous metal flakes (Magnetic heating plate) must go through the step of placing the manufacturing method is cumbersome, if the level is not properly made, there is a problem that a defect occurs.

In addition, the Republic of Korea Patent No. 611646 has a problem that the design of the metal plate (magnetic heating plate) is followed as the metal plate is simply placed on the mold by the non-ferrous metal flakes. In other words, in order to expose the metal plate (magnetic heating plate) to the bottom of the cooking vessel, the non-ferrous metal flakes must be supported at a predetermined height on the mold by using the non-ferrous metal flakes as a medium. Following this, in order to solve this problem, there is a problem in that the cross section of the metal plate body has to be configured in the form of "a" as shown in FIG. 6 of Korean Patent No. 611646.

In addition, the Republic of Korea Patent No. 611646 has a structure in which one surface of the metal plate serving as a magnetic heating plate is exposed to the bottom surface of the cooking vessel, there is a problem that one surface of the metal plate exposed to the bottom surface discolored when used for a long time In the case where the material of the metal plate is made of steel, rust is easily generated. In addition, the Republic of Korea Patent No. 611646 has a problem that the manufacturing process is cumbersome because the bottom surface of the container body demolded from the mold to be polished in order to expose one surface of the metal plate to the bottom surface of the cooking vessel.

On the other hand, Republic of Korea Patent Publication No. 2004-23120 (published on March 18, 2004) in the die casting mold consisting of a moving mold and a fixed mold, the fixed mold is to form a magnet in the recessed portion to allow the magnetic metal plate to be adhesively fixed 'Die-casting mold for forming kitchen cooking utensils' has been proposed. In addition, the Republic of Korea Patent No. 893105 has been proposed a 'mold apparatus for forming a cooking vessel for an induction stove to attach a heating plate by a magnetic force by installing a number of magnets on the bottom of the upper mold.

However, Korean Patent Laid-Open Publication No. 2004-23120 and Korean Patent Registration No. 893105 have a structure in which a permanent magnet is installed in a mold to attach a magnetic metal plate or a heating plate, so that the magnetic force of the magnet decreases during mass production over a long period of time. It has a fundamental problem of being lost. Although, in the Republic of Korea Patent Publication No. 2004-23120 and the Republic of Korea Patent No. 893105, the alnico series permanent magnet or samarium cobalt (SmCo) series of permanent magnets are applied to prevent magnetic extinction at high temperature. In case of prolonged use, demagnetization and loss of magnetism are essential.

Thus, the present invention was made to solve the general problems of the existing method of manufacturing a cooking vessel,

The problem to be solved by the present invention is to attach the magnetic heating plate to the upper mold by using an electromagnet and a magnetic medium that does not lose the magnetic force even at high temperature to improve the durability by preventing the magnetic force is lowered or extinguished even during mass production for a long time The present invention provides a method for manufacturing a cooking vessel using a gravity-casting cooking container manufacturing mold and a gravity-casting cooking container manufacturing mold.

Another problem to be solved by the present invention is to produce the bottom surface of the cooking vessel by the semi-solid method by performing the electromagnetic stirring by alternately applying the power to a plurality of electromagnet modules in the reaction high section of the molten metal surface state The present invention provides a method for manufacturing a cooking vessel using a gravity-casting cooking container and a method for manufacturing a gravity-casting cooking container which can be expected to improve the thermal conductivity and thereby improve the thermal conductivity.

Another problem to be solved by the present invention is to install a magnetic heating plate on the bottom surface of the cooking vessel, by adjusting the thickness and insertion depth to the bottom surface to generate heat by the magnetic field stress generated discoloration or rust when used for a long time It is possible to prevent the phenomenon, and to produce a magnetic heating plate made of low-cost metal material to provide a cost-saving effect of the gravity-casting cooking vessel manufacturing mold and to provide a cooking vessel manufacturing method using the gravity-casting cooking vessel manufacturing mold. There is.

As a specific means of the present invention for solving the above problems;

In the cooking vessel manufacturing mold for manufacturing the cooking vessel by gravity casting method is composed of the upper mold provided with the molten metal inlet and the lower mold installed magnetic heating plate,

The upper mold is provided with a plurality of magnetic media for attaching the magnetic heating plate to the inside of the upper mold, an electromagnet module coupled to each of the magnetic media is installed outside the upper mold, the electromagnet module supplies power It is electrically connected to the control box, the upper surface of the magnetic heating plate is provided with a gravity casting cooking vessel manufacturing mold, characterized in that a plurality of positioning pieces for installing the magnetic heating plate in the bottom surface of the cooking vessel is installed. .

In a preferred embodiment, the positioning piece is made of the same aluminum material as the molten metal injected through the molten metal inlet, the magnetic heating plate may be composed of an iron plate, the thickness of the magnetic heating plate is the bottom thickness of the cooking vessel A thickness ratio of 20 to 50% can be applied.

In another embodiment, the manufacturing method using the gravity-casting cooking vessel manufacturing mold,

Mounting a magnetic heating plate on the lower mold;

Installing a plurality of positioning pieces on an upper surface of the magnetic heating plate;

The magnetic heating plate by supplying power to each of the electromagnet modules through the control box in the state of combining the upper mold with a plurality of magnetic media connected to the electromagnet module and the control box for supplying power to the electromagnet module. Moving to the upper mold direction in which the magnetic medium is located, and simultaneously injecting a non-ferrous metal molten metal into the combined upper and lower molds to dissolve the positioning pieces;

Casting a cooking vessel such that the magnetic heating plate is installed on the bottom surface of the cooking vessel through a process of alternately applying power to each of the electromagnet modules for a predetermined time; And

Demolding the cooking vessel from the upper and lower molds; It is implemented to include.

As described above, the method for manufacturing a cooking vessel using the gravity-casting cooking vessel manufacturing mold and the gravity-casting cooking vessel manufacturing mold according to the present invention moves the magnetic heating plate in the upper mold direction through an electromagnet module and a magnetic medium, even when used for a long time. There is an advantage that can prevent the decrease of magnetism and magnetic disappearance phenomenon. In addition, in the present invention, by applying a plurality of electromagnet modules alternately in the reaction high section of the molten metal to perform electromagnetic agitation, the bottom portion of the cooking vessel can be manufactured by the semi-solid method to improve the surface state and thus It can be expected to improve the thermal conductivity according to.

In addition, the magnetic heating plate can be installed on the bottom surface of the cooking vessel by installing a positioning piece that is dissolved by molten molten metal on the upper surface of the magnetic heating plate, thereby preventing discoloration or rust when used for a long time. have.

Figure 1 is a side cross-sectional view for explaining the overall configuration of the gravity casting cooking container manufacturing mold according to the present invention.
Figure 2 is a configuration diagram for explaining the electromagnet module and control box installed in the upper mold in the gravity-casting cooking vessel manufacturing mold according to the present invention.
3 is a side cross-sectional view for explaining a state in which the upper and lower molds are separated in the gravity casting cooking vessel manufacturing mold according to the present invention.
4 is an exploded perspective view of the lower mold for explaining the magnetic heating plate provided with the positioning piece.
5 is a side cross-sectional view illustrating a state in which the upper and lower molds are combined in the gravity casting cooking container manufacturing mold according to the present invention.
FIG. 6 is a partial cutaway perspective view illustrating a magnetic heating plate provided with a positioning piece in the upper and lower molds of FIG. 5.
7 is a side cross-sectional view illustrating a state in which a magnetic heating plate is moved in an upper mold direction in which a magnetic medium is installed in the gravity casting cooking container manufacturing mold according to the present invention.
8 is a side cross-sectional view for explaining a state in which molten metal is injected in the gravity-casting cooking container manufacturing mold according to the present invention.
Figure 9 is a side cross-sectional view for explaining the cooking vessel manufactured by the gravity-casting cooking vessel manufacturing mold according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Here, the cooking vessel manufacturing mold to which the present invention is applied may be defined as a manufacturing mold applied to the gravity casting formula, which is a method of filling the empty space of the mold using gravity casting formula, for example, the fluidity of the molten metal, and a low pressure casting formula. Note that it is different from manufacturing mold or pressure casting (die casting method) manufacturing mold.

1 and 2, the gravity casting cooking container manufacturing mold (1) of the present invention is a lower mold (3), the magnetic heating plate 4 is installed, and the upper mold (2) is provided with a molten metal inlet (23) The upper mold 2 further includes a magnetic medium 24, an electromagnet module 25 and a control box 26, and a positioning piece 42 on the upper surface of the magnetic heating plate 4. ) Is installed.

Gravity casting manufacturing mold (1) of the present invention is largely classified into an upper mold (2) and a lower mold (3), typically the upper mold (2) is provided with a cavity core (21) and molten metal inlet (23) The upper core 22, the lower mold 3 is composed of a stripper 31 and the insert core (32). At this time, the lower mold (3) is a fixed mold, the upper mold (2) is a moving mold is connected to a separate moving means (not shown in the figure.) To the mold or release the lower mold (3), Lowering operation

The magnetic medium 24 is provided at a plurality of upper cores 22 constituting the upper mold 2, for example, the upper mold 2 at predetermined intervals. The magnetic medium 24 is a magnetic metal rod made of SUS440 or other alloy material containing iron, which is magnetic, and is installed in a vertical insertion form on the upper mold. For this purpose, the upper core 22 of the upper mold The magnetic medium can be installed in an interference fit type (inserted with the upper core in a heated state) by providing a vertical hole, or a screw thread can be provided in the vertical hole and a screw thread can be installed in the magnetic medium to be screwed. have. At this time, the magnetic medium 24 may be arranged on the outer periphery of the molten metal inlet, a plurality, preferably four to six on the upper core 22 of the upper mold (2), the upper mold (2) 4 ~ 10 can be installed according to the size, the installation position is the position where the magnetic heating plate (4) is placed so that the magnetic heating plate (4) is installed in the lower mold (3) Are arranged within a range corresponding to In addition, one end of the magnetic medium 24 installed as described above, that is, one end inserted into the upper mold 2: the upper core 22 coincides with the lower surface of the upper mold 2: the upper core 22. The other end has a configuration in which the other end protrudes (may be bent at a predetermined angle) at a predetermined length from the upper side of the upper mold (2: upper core 22).

The electromagnet module 25 is electrically connected to each of the magnetic media 24 protruding outward from the upper side of the upper mold 2. The electromagnet module 25 is configured to include a bobbin 251 inserted into the magnetic medium 24 and a coil 252 wound around the bobbin 251 and connected to an external power source.

The control box 26 is installed at a place separate from the upper and lower molds 2 and 3, for example, a place that is easy for the operator to operate, and the control box 26 is a coil of the electromagnet module 25. In order to supply external power to the 252 has a configuration electrically connected to the coil 252 of each electromagnet module 25. The control box 26 supplies power to the coils 252 of the electromagnet module 25, and supplies power to the coils 252 of all the electromagnet modules 25 for a predetermined time, and then each electromagnet module. A control circuit (not shown in the figure) programmed to supply power alternately with (25) is incorporated. In addition, the control circuit of the control box 26 may further include a timer to supply or alternately supply power to the electromagnet module 25 for a predetermined time.

Meanwhile, the magnetic heating plate 4 seated on the upper surface of the insert core 32 constituting the lower mold 3, for example, the lower mold 3, is a thin metal plate material made of magnetic material, such as stainless steel or aluminum. A plated steel sheet may be used, and preferably, an inexpensive iron sheet may be applied. At this time, the magnetic heating plate 4 is formed with a plurality of long holes 41, that is, a plurality of long holes 41 that are filled with aluminum to improve the bonding force with the bottom surface of the container, in the present invention, the magnetic heating plate 4 is As the upper mold 2 is moved upward by the magnetic medium 24 by the electromagnet module 25, various types of magnetic materials may be applied without regard to the shape of the magnetic heating plate 4 or the number of holes. Can be. In addition, it is preferable that the magnetic heating plate 4 is provided with a thickness capable of generating heat by magnetic field stress in a state in which it is installed on the bottom surface of the cooking vessel, as well as heating the cooking vessel by flame heating. However, in the present invention, when the thickness of the magnetic heating plate is 20 to 50% of the thickness ratio of the bottom surface of the cooking vessel, for example, when the thickness of the bottom surface is 10mm, the thickness of the magnetic heating plate can be applied to the thickness ratio of 2 ~ 5mm. have.

On the other hand, a plurality of positioning pieces 42 are provided on the upper surface of the magnetic heating plate (4). The positioning piece 42 is made of the same aluminum material as the molten metal so as to be dissolved by the molten metal injected through the molten metal inlet. At this time, the positioning piece 42 may be configured in the form of a bent piece having a predetermined thickness as shown in Figure 4, in addition to the space between the upper mold and the magnetic heating plate provided with the magnetic medium. Any form can be applied as long as it can be formed (for example, in the form of a ring). The number of the positioning pieces 42 provided on the upper surface of the magnetic heating plate 4 is in the form of a long hole. Accordingly, four to eight (in FIG. 4 shows a state in which five are installed) may be applied, and it is preferable to install at a position not overlapping with the position of the magnetic medium described above.

In addition, the thickness of the positioning piece (H1: vertical height shown in Figure 5) is also associated with the depth (H2) that the magnetic heating plate is built on the bottom surface of the cooking vessel, as described above to the magnetic field stress during heating by the induction stove It is preferable to set the thickness of the positioning piece to about 2 mm so as to generate heat, and accordingly, the depth (H2 shown in FIG. 9) of the magnetic heating plate in the sea dog of the cooking vessel can also generate heat by magnetic field stress. It can be adjusted within 1 ~ 2mm.

Thus, the cooking vessel manufacturing method through the gravity-casting cooking vessel manufacturing mold according to the present invention having the configuration as described above will be described.

Referring to Figures 3 to 6, the manufacturing method of the present invention is implemented including a magnetic heating plate mounting step, positioning piece installation step, magnetic heating plate lifting and positioning piece melting step, casting step, demolding step .

In the mounting step of the magnetic heating plate 4, the magnetic heating plate 4 is seated on the upper surface of the insert core 32 of the lower mold 3. In this case, the magnetic heating plate 4 may be seated in the center of the insert core 32, and a mounting means such as a separate jig may be used to mount the magnetic heating plate in place. (See FIG. 3).

In the installing step of the positioning piece 42, a plurality of positioning pieces are installed on the upper surface of the magnetic heating plate. (See Fig. 4).

In the step of elevating and positioning the magnetic heating plate 4 and dissolving the positioning piece 42, the upper mold 2 is molded into the lower mold 3 on which the magnetic heating plate 4 is seated (see FIGS. 5 and 6). The upper mold 2 includes a plurality of magnetic media 24 connected to the electromagnet module 25 and a control box 26 for supplying power to the electromagnet module 25. The upper and lower molds 2 In the state in which 3 is combined, power is supplied to all the electromagnet modules 25 through the control box 26 to move the magnetic heating plate 4 in the upper mold 2 direction. At this time, since the plurality of positioning pieces 42 are provided on the upper surface of the magnetic heating plate 4, the upper mold and the magnetic heating plate are kept spaced apart by the thickness of the positioning pieces (see Fig. 7).

At the same time, injecting non-ferrous metal molten metal, that is, aluminum molten metal into the molded upper and lower molds to dissolve the positioning pieces. At this time, non-ferrous metal molten metal is filled in the upper and lower molds, and thus filling pressure is generated. Even when the positioning piece is dissolved, the magnetic heating plate is kept in a state spaced apart from the upper mold. (See FIG. 8)

The casting step casts the cooking vessel 5 such that the magnetic heating plate 4 is installed on the bottom surface of the cooking vessel through a process of alternately applying power to each of the electromagnet modules 25 for a predetermined time.

In this case, the time of alternately applying power to the electromagnet module 25 may be performed from the time of injecting the non-ferrous metal molten metal to the reaction high section of the non-ferrous metal molten metal, which is 1/2 of the total casting time. Can be defined That is, if the total casting time is 2 minutes, the reaction section of the non-ferrous metal molten metal corresponds to the time from injection point to 1 minute. In addition, the alternating power supply of the electromagnet module 25 performed by the control circuit of the control box 26 as described above may be regular or irregular. In other words, the form of alternating power to the four electromagnet modules, for example, "1 off / 2, 3, 4 on", "2 off / 1, 3, 4 on", "3 off / 1, 2, 4 times ", or a regular form, such as randomly supplying power to one or two electromagnet modules, the rest may be an irregular form that does not supply power.

Here, when power is alternately applied to the electromagnet module 25 in the reaction high section of the molten metal as described above, as a result, the magnetic medium 24 is electromagnetized to generate a magnetic field, and at the same time, a minute vibration (60 Hz) )) Is generated, which causes electromagnetic stirring of the molten solid state of the reaction.

Accordingly, in the casting step of the present invention, the bottom surface of the cooking vessel is cast by a semi solid (SSF (semi solid forged) method) as electromagnetic stirring is performed through the magnetic medium 24. In this way, when the molten metal is stirred in the reaction solid state using the semi-solid method, the macrostructure of the solute atom is formed by forming the spherical primary particles and the liquid surrounding the primary crystal instead of the coarse dendritic structure that appears in the ordinary cast product. Since the metal structure is minimized, the bottom surface of the cooking vessel can obtain the effect of improving the surface texture state and thus the thermal conductivity. In other words, by improving the surface condition and surface texture of the bottom of the cooking vessel, high thermal conductivity can be obtained, thereby reducing cooking time, and improving the surface structure, and thus, the coating lasts for a long time. have.

The demolding step demolds the cooking vessel 5 from the upper and lower molds 2 and 3. This is implemented by releasing the upper mold 2 from the lower mold 3 and then demolding the cooking vessel 5 of the lower mold 3, that is, the insert core 32. The cooking vessel 5 manufactured as described above is capable of being heated by the magnetic field induction as well as the flame heating as the magnetic heating plate 4 is built to a depth capable of generating heat due to magnetic field stress on the bottom surface. (Also, when used for flame heating, thermal conductivity can be improved by improving the texture of the floor as described above.)

Therefore, the manufacturing method according to the present invention implemented as described above by using the electromagnet module 25 and the magnetic medium 24 to move the magnetic heating plate 4 in the upper mold (2) direction by the magnetic force is not lowered or disappeared. There is an advantage that can be used continuously, and by implementing the semi-solid method through the electromagnetic agitation in the reaction high section can improve the physical properties of the bottom surface of the cooking vessel to obtain a high thermal conductivity and processability. In particular, the cooking vessel manufactured by the manufacturing method according to the present invention can thicken its own thickness so that the magnetic heating plate built in the bottom surface can generate heat by the magnetic field stress, and the depth inserted into the bottom surface by the positioning piece. In addition, it can be controlled to prevent the phenomenon of discoloration or rust when used for a long time, and as a constituent material of the magnetic heating plate can be applied to a steel plate relatively cheaper than stainless steel has the advantage of reducing the cost.

It should be noted that the above-described embodiments are only illustrative and are not intended to limit the scope of the present invention so that those skilled in the art can readily understand and carry out the present invention. Therefore, it should be noted that various modifications or changes to the above-described embodiments may be applied to a mold for manufacturing a cooking container with a low pressure casting type by providing a molten metal inlet at a lower mold. The scope of the present invention is defined by the following claims in principle.

1: Manufacturing mold 2: Upper mold
3: lower mold 4: magnetic heating plate
5: cooking container 21: cavity core
22: upper core 23: molten metal inlet
24: magnetic medium 25: electromagnet module
26: control box 31: stripper
32: insert core 41: long
42: positioning piece 251: bobbin
252: coil H1: positioning piece thickness
H2: depth built into the bottom of cooking vessel of magnetic heating plate

Claims

In the cooking vessel manufacturing mold for manufacturing the cooking vessel by gravity casting method is composed of the upper mold provided with the molten metal inlet and the lower mold installed magnetic heating plate,
The upper mold is provided with a plurality of magnetic media for attaching the magnetic heating plate to the inside of the upper mold, an electromagnet module coupled to each of the magnetic media is installed outside the upper mold, the electromagnet module supplies power And a plurality of positioning pieces which are electrically connected to a control box, the upper surface of the magnetic heating plate being installed on the bottom surface of the cooking vessel to install the magnetic heating plate.

The method of claim 1,
The positioning piece is made of the same aluminum material as the molten metal injected through the molten metal inlet, the magnetic heating plate is made of iron plate, the thickness of the magnetic heating plate is 20 to 50% of the thickness of the bottom surface of the cooking vessel Gravity casting cooking container manufacturing mold, characterized in that the thickness ratio is applied.

Mounting a magnetic heating plate on the lower mold;
Installing a plurality of positioning pieces on an upper surface of the magnetic heating plate;
The magnetic heating plate by supplying power to each of the electromagnet modules through the control box in the state of combining the upper mold with a plurality of magnetic media connected to the electromagnet module and the control box for supplying power to the electromagnet module. Moving to the upper mold direction in which the magnetic medium is located, and simultaneously injecting a non-ferrous metal molten metal into the combined upper and lower molds to dissolve the positioning pieces;
Casting a cooking vessel such that the magnetic heating plate is installed on the bottom surface of the cooking vessel through a process of alternately applying power to each of the electromagnet modules for a predetermined time; And
Demolding the cooking vessel from the upper and lower molds; Method of producing a cooking vessel using a gravity-casting cooking vessel manufacturing mold comprising a.