JP5559089B2 - Manufacturing method of cooking pot and cooking pot for heating cooker manufactured by this method - Google Patents

Description

  The present invention relates to a method for manufacturing a cooking pot such as a rice cooker, a mochi machine, and a bread maker, and a cooking pot for a heating cooker manufactured by this method.

  In this type of cooker, a cooking pot for storing a cooked product is detachably accommodated in the accommodating portion of the main body. Then, by controlling the heating means arranged inside the main body according to a preset program, the cooked food inside is heated via the cooking pot to execute predetermined cooking.

  Patent Document 1 describes a cooking container formed by deep drawing iron. In this cooking container, an enamel undercoat layer is formed on the inner and outer surfaces of the deep-drawn pot body. Further, an enamel cover coat layer is further formed on the outer surface, while a rough enamel layer made of a glaze different from the undercoat layer is formed on the inner surface, and a fluororesin layer is further formed thereon. Has been.

  Patent Document 2 describes an inner hook having a substantially cylindrical shape with a bottom and provided with a projecting portion projecting radially outward so as to be positioned between the bottom surface portion and the upper end opening. Yes. This inner hook is formed by forming a ferromagnetic layer on the outer surface of an aluminum hook body and induction heating by an induction heating coil. In addition, this inner pot is configured such that a ferromagnetic layer is also formed on the lower surface of the protrusion, and the protrusion can also be induction heated by an induction heating coil.

  However, the cooking container of Patent Document 1 has a high melting point of a metal that is a material for forming the main body of the pot, and therefore cannot be molded by a mold and cannot have a complicated shape as in Patent Document 2. On the contrary, since the inner hook of patent document 2 is a complicated shape, it cannot be manufactured with a metal material with a high melting point.

Japanese Utility Model Publication No.59-101940 JP-A-9-37933

  An object of the present invention is to provide a cooking pot manufacturing method that can be formed in a desired shape regardless of the forming material, and a cooking pot for a heating cooker manufactured by the method.

In order to solve the above-described problems, the method of manufacturing a cooking pot according to the present invention has a substantially inverted conical cylindrical shape in which the bottom surface portion is closed and the upper end is opened, and the radially outer side is formed between the bottom surface portion and the upper end opening portion. A manufacturing method of a cooking pot provided with a ridge that protrudes in a direction, and a workpiece forming step for forming a metal workpiece having a thickness including the ridge at least above the ridge. A hook body forming step of forming a hook body having the flange by cutting or grinding the outer surface of the workpiece, and a hollow coat on a region extending from the bottom surface portion of the outer surface of the hook body to the upper end opening. e Bei outer face machining step of forming the layer, and an inner surface machining step of forming a fluorine coating layer from the bottom portion of the inner surface of the hook body in the region subjected to the enamel coating layer, wherein the outer surface processing step After or inside surface After step, only the lower surface and lower surface of the flange portion of the bottom portion further has a lower surface machining step of forming the respective buffer coat layer.

  This manufacturing method forms a pot body having a flange in the middle by cutting or grinding a workpiece formed with a thick wall, so that a cooking pot having a desired shape can be formed accurately and reliably. In the workpiece forming step, since high accuracy is not required for forming the workpiece, even a metal material having a high melting point can be manufactured by a predetermined manufacturing method such as casting or forging.

In addition, in order to form a buffer coating layer only on the bottom surface of the bottom portion and the bottom surface of the flange portion, minute pores are formed on the surface of the enamel coating layer by the gas released from the pot body in the outer surface processing step. Even if formed, the pores can be covered with a buffer coating layer. Therefore, when this cooking pot is placed on the sink, it is possible to prevent the sink from being damaged at the bottom portion. Moreover, when a cooking pot is set to a heating cooker etc., it can prevent damaging the receiving part of a heating cooker with a buttocks.

In this manufacturing method, in the hook body forming step, it is preferable to perform cutting or grinding so as to form a positioning flange portion protruding radially outward from the flange portion at the upper end of the outer surface of the workpiece.

And the cooking pot for the heating cooker manufactured by this method has a bottomed substantially inverted conical cylindrical shape with the bottom portion closed and the upper end opened, and is detachably accommodated in the accommodating portion of the main body and disposed in the main body. A cooking pot for a heating cooker that heats the food accommodated therein by being heated by the heating means, and by cutting or grinding the outer surface of the metal workpiece, A hook body having a flange projecting radially outwardly is provided between the upper end opening, and a hollow coat layer is formed on the outer surface from the bottom surface of the hook body to the upper end opening. the fluorine coating layer formed from the bottom surface portion of the hook body to the inner surface being subjected to the enamel coating layer, further, only the lower surface and lower surface of the flange portion of the bottom portion, that forms the respective buffer coat layer A.

  Since this cooking pot is provided with a collar portion between the bottom surface portion and the upper end opening, it is possible to form a heat insulating space closed from the collar portion to the lower side when mounted on the main body. Therefore, it is possible to cook with high heating power without releasing the heat generated by the heating means. Moreover, since the enamel coat layer is provided in the outer surface of the cooking pot, even if iron is used as a forming material, rust is not generated. Furthermore, since the fluorine coat layer is provided on the inner surface of the cooking pot, it is possible to prevent the food stored inside from adhering thereto.

  In the manufacturing method of the present invention, a workpiece having a desired shape can be accurately and reliably formed because the workpiece formed with a large thickness is cut or ground. In addition, since the workpiece is not required to have high accuracy during shape, it can be reliably manufactured by a predetermined manufacturing method regardless of the forming material.

  In the cooking pot for the cooking device manufactured by this method, since the heel portion is provided between the bottom surface portion and the upper end opening, the heat insulating space formed on the lower side from the heel portion in the mounted state on the main body, It is possible to cook with high heating power without releasing the heat generated by the heating means. Moreover, since the enamel coat layer is provided in the outer surface of the cooking pot, rust is not produced even if iron is used as a forming material. Furthermore, since the fluorine coat layer is provided on the inner surface of the cooking pot, it is possible to prevent the food contained therein from adhering.

It is principal part sectional drawing which shows the rice cooker which is a heating cooker to which the cooking pot manufactured by the method of 1st Embodiment of this invention is applied. The cooking pot of 1st Embodiment is shown, (A) is a perspective view, (B) is sectional drawing. (A) is a principal part expanded sectional view of the cooking pot of 1st Embodiment, (B) is a principal part expanded sectional view of the modification of the cooking pot of 1st Embodiment. It is sectional drawing which shows the 1st step of the manufacturing method of the cooking pot of 1st Embodiment. It is sectional drawing which shows the 2nd step of the manufacturing method of a cooking pot. It is sectional drawing which shows the 3rd step of the manufacturing method of a cooking pot. It is sectional drawing which shows the 4th step of the manufacturing method of a cooking pot. It is sectional drawing which shows the 5th step of the manufacturing method of a cooking pot. It is sectional drawing which shows the 6th step of the manufacturing method of a cooking pot. It is sectional drawing which shows the 1st step of the manufacturing method of the cooking pot of 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a rice cooker 10 that is a heating cooker equipped with a cooking pot for heating cooker (hereinafter abbreviated as “cooking pot”) 30 manufactured by the manufacturing method according to the embodiment of the present invention. The cooking pot 30 is manufactured through a predetermined processing step by using iron having a melting point higher than that of aluminum as a forming material of the pot body 31 and forming a workpiece 42 to be the pot body 31 by casting.

  First, the rice cooker 10 equipped with the cooking pot 30 of the present invention will be described. The rice cooker 10 includes a rice cooker main body 11 that detachably accommodates a cooking pot 30, and a lid 22 is disposed on the top of the rice cooker main body 11 so as to be opened and closed.

  The rice cooker body 11 is provided with an opening for disposing the cooking pot 30 on the shoulder body 12 located at the top. Below the opening, a cylindrical inner cylinder 13 and a protective frame 14 made of a non-conductive material are disposed, and a container 15 for the cooking pot 30 is formed by these. In addition, buffer spacers (not shown) are arranged at predetermined intervals in the circumferential direction at the opening of the shoulder body 12 that is the entrance of the accommodating portion 15.

An induction heating coil 16, which is a first heating means for induction heating the cooking pot 30, is disposed on the lower outer peripheral surface of the protective frame 14 via a ferrite core 17. In addition, a stepped receiving portion 18 that comes into contact with the bowl portion 36 of the cooking pot 30 is provided on the upper portion of the protective frame 14. The stepped receiving portion 18 is provided with a wing heater 19 as a second heating means. Further, on the outer peripheral surface of the inner cylinder 13, a cylinder heater 20, which is a third heating means for heating the upper side of the bowl 36 of the cooking pot 30, is disposed. In addition, the protective frame 14 is provided with a temperature sensor 21 for the pot that is a first temperature detecting means for detecting the temperature of the cooking pot 30.

  The lid 22 is provided with an inner lid 23 that seals the upper end opening of the cooking pot 30. Although not shown, the lid 22 includes an exhaust passage that communicates the inside and outside of the cooking pot 30, a lid heater that is a fourth heating means for heating the upper space of the cooking pot 30, and the cooking pot 30. And a lid temperature sensor which is a second temperature detecting means for detecting the temperature of the lid.

  And this rice cooker 10 is a cooked food set in the cooking pot 30 by the microcomputer as the control means controlling the heating means according to a preset program based on the input value from each temperature sensor. A certain cooked rice and water are heated, and the cooked rice is cooked (cooked) by performing various processes such as preheating, medium cooking, boiling maintenance and spotting.

  As shown in FIGS. 2 (A) and 2 (B), the cooking pot 30 of the present embodiment is manufactured by casting using a southern iron having high heat storage and magnetism as a forming material of the pot body 31. . The cooking pot 30 is formed in a bottomed substantially inverted conical cylinder shape in which the bottom surface portion 32 is closed as a substantially flat disk shape and the outer peripheral portion 33 is gradually expanded in diameter upward. A curved portion 34 that is curved with a predetermined curvature is provided between the bottom surface portion 32 and the outer peripheral portion 33. The cooking pot 30 is induction-heated by an eddy current flowing from the bottom surface portion 32 to the curved portion 34 by a magnetic field generated by applying a high-frequency current to the induction heating coil 16 of the rice cooker 10.

  The cooking pot 30 is provided with a positioning flange portion 35 projecting radially outward at the upper end. The positioning flange portion 35 has its lower surface placed on a buffer spacer on the housing portion 15. In addition, the cooking pot 30 is provided with a flange portion 36 that protrudes radially outward at an intermediate position between the upper end provided with the positioning flange portion 35 and the bottom surface portion 32 heated by the induction heating coil 16. . The flange 36 is formed in an annular shape having an outer diameter smaller than the outer diameter of the positioning flange 35 and the inner diameter of the opening of the shoulder body 12, and a stepped receiving portion 18 whose lower surface is formed in the accommodating portion 15. Touch.

  Further, the cooking pot 30 is provided with a hollow coat layer 37 on the outer surface from the center of the bottom surface portion 32 to the positioning flange portion 35 at the upper end of the outer peripheral portion 33. This enamel coat layer 37 is excellent in heat resistance and wear resistance, and is intended to prevent rusting of the southern iron constituting the hook body 31. The enamel coat layer 37 is formed by applying a glassy glaze and baking at a high temperature.

  Further, as shown in FIGS. 2B and 3A, the cooking pot 30 is provided with a fluorine coat layer 38 on the inner surface of the bottom surface portion 32 and the enamel coat layer 37. The fluorine coat layer 38 is excellent in heat resistance and water repellency, and is intended to prevent the pot body 31 from rusting as well as the enamel coat layer 37 and to prevent the food contained therein from adhering. The fluorine coating layer 38 is formed by applying and baking a predetermined fluorine resin.

  The fluorine coat layer 38 of the present embodiment is formed on the surface of the base coat layer 39 by forming a base coat layer 39 on the surface of the hook body 31. The base coat layer 39 is a mixture of an adhesive component that adheres to the hook body 31 that is the base and a fluororesin that adheres the fluorine coat layer 38 formed on the surface. The undercoat layer 39 is formed by applying a fluorine mixed resin and drying it. Between these coat layers 38 and 39, the scale 40 which shows the amount of water (position) for every rice cooking capacity is provided by printing. The scale 40 is provided by pad printing or the like in which ink is attached to an elastic member such as a silicon rubber pad and the ink is transferred to the surface of the base coat layer 39. Then, after printing the scale 40, the fluorine coat layer 38 is formed.

  And in the cooking pot 30 of this embodiment, the buffer coating layer 41 is provided in the lower surface of the bottom part 32 and the lower surface of the collar part 36 with which the manufactured cooking pot 30 frequently interferes with another member, respectively. . The buffer coat layer 41 is intended to smooth the unevenness caused by the fine pores generated by the formation of the enamel coat layer 37. The buffer coat layer 41 is formed by coating a heat resistant resin. As this heat-resistant resin, a silicon-based or epoxy-based paint, which is a nonmagnetic material that can withstand heating at about 250 ° C., can be applied. In addition, as the heat resistant resin, a ceramic-modified silicone resin paint may be used.

  The cooking pot 30 configured as described above is manufactured by sequentially performing a workpiece forming step, a pot body forming step, an outer surface processing step, an inner surface processing step, and a lower surface processing step.

(Workpiece forming step)
In the workpiece forming step, the workpiece 42 to be the hook body 31 is formed. This workpiece forming step is performed by casting molten southern iron into a sand mold formed using a model of the cooking pot 30 made of a predetermined material. At this time, the model is in a state in which a groove-like recess between the outer end edge of the positioning flange portion 35 and the outer end edge of the flange portion 36 is filled. Thereby, when the cast molten metal is solidified, a workpiece 42 shown in FIG. 4A is formed.

  As shown by a broken line in FIG. 4A, the workpiece 42 has a predetermined thickness (for example, 1 mm) larger than that of the hook body 31 after processing. Specifically, the workpiece 42 has a hook lower portion 43 having a bottom surface portion 32, and a hook upper portion 44 that protrudes radially outward from the hook lower portion 43. The inner side surfaces of the hook lower portion 43 and the hook upper portion 44 are constituted by continuous surfaces without steps. The hook upper part 44 is an upper part with the collar part 36 as a boundary, and the outward projecting dimension is a thickness including the projecting dimension of the collar part 36. In addition, the to-be-processed body 42 formed by casting iron has the black skin containing many impurities which are easy to generate | occur | produce rust on the surface.

(Cook body formation step)
In the hook body forming step, the outer surface and inner surface of the workpiece 42 are ground and cut to finish the designed hook body 31 with high accuracy as shown in FIG. 4B. In this hook body forming step, a concave groove is formed by grinding an intermediate region excluding the upper and lower ends of the hook upper portion 44. As a result, the workpiece 42 is formed with a positioning flange 35 projecting radially outward at the upper end of the outer surface and a flange 36 projecting radially outward is formed at an intermediate position. In the hook body forming step, the outer surface and inner surface of the workpiece 42 are ground to completely remove the black surface layer. By these machining, precise dimension setting can be realized and impurities on the surface layer can be completely removed. Further, the surface of the hook body 31 from which the surface layer has been removed becomes silver having a gloss specific to metal.

(Outer surface processing step)
In the outer surface processing step, as shown in FIG. 4C, an enamel coat layer 37 is formed on the outer surface of the hook body 31 that extends from the bottom surface portion 32 to the upper end of the positioning flange portion 35. In this outer surface processing step, first, the hook body 31 is baked to form an oxide film on the surface, and the inner gas is vented. Next, a granular abrasive is sprayed onto the surface with compressed air to remove the oxide film (blast treatment). Thereafter, black enamel glaze is applied to the outer surface of the hook body 31 from the bottom surface portion 32 to the upper end of the positioning flange portion 35, and firing is performed.

  The enamel coat layer 37 of the present embodiment has only one layer without overcoating two or more layers. This is because when a multi-layer coating having two or more layers is applied, a large amount of vitreous material adheres to the surface, so that the surface becomes glossy and the casting feels thin. On the other hand, the enamel coat layer 37, which has only one layer, is degassed by pretreatment firing, but when the applied glaze is fired, the gas in the pot body 31 is released and the release action causes the surface Micropores are formed in the surface. And the unevenness | corrugation by this micropore can give a user the texture that it is a traditional iron feather pot.

(Inner side machining step)
In the inner side surface processing step, a fluorine coat layer 38 is formed on the inner side surface of the hook body 31 that extends from the bottom surface portion 32 to the upper end (hollow coat layer 37) of the positioning flange. In this inner surface processing step, first, a blasting process is performed by spraying a granular abrasive on the surface with compressed air. Next, as shown in FIG. 4D, a base fluorine mixed resin is applied to the entire inner surface and the outer surface of the positioning flange portion 35 and dried to form a base coat layer 39. The inner surface of the hook body 31 on which the base coat layer 39 is formed is black having substantially the same color as the enamel coat layer 37. Next, as shown in FIG. 4E, a scale 40 is pad printed on the surface of the formed undercoat layer 39. Thereafter, as shown in FIG. 4F, a fluorine resin is applied to the surface of the base coat layer 39 including the scale 40 and baked to form a fluorine coat layer 38. The fluorine coat layer 38 is transparent. Therefore, the inner surface of the hook body 31 on which the fluorine coat layer 38 is formed is black, which is the color of the base coat layer 39.

(Lower side processing step)
In the lower surface processing step, as shown in FIG. 2B, a buffer coating layer 41 is formed on the lower surface of the bottom surface portion 32 and the lower surface of the flange portion 36. In the lower surface processing step, a heat resistant resin is applied to the lower surface of the bottom surface portion 32 and the flange portion 36, and a drying process is performed.

  As described above, in the manufacturing method of the present invention, the hook main body 31 having the flange portion 36 is formed at the intermediate position by cutting or grinding the workpiece 42 formed with a thick wall. The cooking pot 30 can be formed. In the workpiece forming step, since high accuracy is not required for forming the workpiece 42, even a metal material having a high melting point can be manufactured by sand casting.

  Further, since the buffer coat layer 41 is provided on the lower surface of the bottom surface portion 32 and the lower surface of the bowl portion 36 where the cooking pot 30 frequently interferes with other members, minute pores are formed on the surface of the enamel coat layer 37. However, it is possible to prevent the sink and the stepped receiving portion 18 of the cooking device from being damaged, and the contact with the temperature sensor for the pot can be improved.

  Further, in the hook body forming step, the surface of the inner surface of the workpiece 42 is ground and the base coat layer 39 is formed, so that the fixability of the fluorine coat layer 38 can be improved. Moreover, in the workpiece forming step, the workpiece 42 is formed so as to have a hook lower portion 43 having a bottom surface portion 32 and a thick pot upper portion 44 including a flange portion 36, so that the processing efficiency is improved. In addition to being able to improve, it is possible to suppress the generation of waste processing waste. Therefore, production cost can be reduced.

  And since the cooking pot for heating cookers manufactured by this method is provided with the flange 36 at the intermediate position, it forms a heat insulation space closed downward from the flange 36 when attached to the rice cooker body 11. be able to. Therefore, it is possible to cook with high heating power without releasing the heat from the induction heating coil 16. Moreover, since the enamel coat layer 37 is provided on the outer surface of the cooking pot 30, even if iron is used as a forming material, rust does not occur. Furthermore, since the fluorine coat layer 38 is provided on the inner surface of the cooking pot 30, it is possible to prevent the food stored inside from adhering thereto.

  FIG. 3B shows a cooking pot 30 according to a modification of the first embodiment. The cooking pot 30 is different in that the fluorine coat layer 38 is provided so as to overlap the enamel coat layer 37. The manufacturing method of the cooking pot 30 of this modification is performed up to the outer peripheral surface of the positioning flange portion 35 of the enamel coat layer 37 to be overlapped when the inner surface of the pot body 31 is blasted. Thereafter, a base coat layer 39 is formed from the inner surface of the hook body 31 to the outer peripheral surface of the positioning flange portion 35, and a fluorine coat layer 38 is formed on the surface. And the cooking pot 30 manufactured in this way can acquire the effect | action and effect similar to the said embodiment.

  FIG. 5 shows one step of the manufacturing method of the second embodiment. This second embodiment is different from the first embodiment in that the workpiece 42 to be molded in the workpiece forming step is provided substantially uniformly with a thickness including the protruding dimension of the flange 36. . In the second embodiment, the entire outer surface is cut in the hook body forming step, and then the inner and outer surfaces are ground. Thereby, the hook main body 31 similar to 1st Embodiment can be formed. And the cooking pot 30 braked in this way can acquire the effect | action and effect similar to 1st Embodiment.

  In addition, the manufacturing method of the cooking pot 30 of this invention is not limited to the structure of the said embodiment, A various change is possible.

  For example, in the embodiment, the lower surface processing step is performed after the inner surface processing step, but may be performed after the outer surface processing step, that is, between the outer surface processing step and the inner surface processing step. .

  Moreover, in the said embodiment, although the to-be-processed object 42 was shape | molded by casting, you may shape | mold by forging, such as molten metal forging formed by pressurizing semi-solidified iron.

  On the other hand, the cooking pot for the heating cooker of the present invention can be variously modified. For example, in the embodiment, the hook body 31 is formed of iron, but may be formed of magnetic stainless steel or copper.

  Moreover, in the said embodiment, although the buffer coat layer 41 was formed with the heat resistant resin, you may comprise by the enamel coat formed by baking a glassy glaze. In this case, it becomes a two-layer enamel coat in which only a part of the outer surface of the cooking pot 30 is overcoated. Therefore, this part is glossy because more glassy material adheres than other parts. However, since the bottom surfaces of the bottom surface portion 32 and the flange portion 36 are portions that are usually difficult to see, even if gloss is generated by the two-layer coating, the texture of the casting is not impaired.

  Furthermore, in the above embodiment, the two-layer structure in which the fluorine coat layer 38 is overcoated on the base coat layer 39 having a fluorine component is adopted, but a three-layer structure in which a middle coat layer is further provided therebetween may be adopted. .

  In the embodiment, the buffer coating layer 41 is not provided on the lower surface of the positioning flange portion 35. However, when no buffer spacer is provided in the opening of the shoulder body 12, the opening of the shoulder body 12 is provided. In order to prevent the part from being damaged, a buffer coat layer 41 may be provided.

  And in the said embodiment, although the rice cooker 10 was mentioned as an example and demonstrated as a heating cooker which mounts the cooking pot 30 of this invention, if it is heating cookers, such as a mochi machine and a bread maker, any Application is possible, and similar actions and effects can be obtained. However, in the case of manufacturing the cooking pot 30 to be mounted on the mochi machine and the bread maker, the upper end positioning flange portion 35 shown in the above embodiment may not be provided.

10 ... Rice cooker (heating cooker)
DESCRIPTION OF SYMBOLS 11 ... Rice cooker main body 15 ... Accommodating part 16 ... Induction heating coil (heating means)
19 ... Feather heater (heating means)
20 ... trunk heater (heating means)
DESCRIPTION OF SYMBOLS 22 ... Lid 30 ... Cooking pot 31 ... Pot main body 32 ... Bottom part 33 ... Outer peripheral part 34 ... Curved part 35 ... Positioning flange part 36 ... Gutter part 37 ... Hollow coat layer 38 ... Fluorine coat layer 39 ... Undercoat layer 40 ... Scale 41 ... Buffer coat layer 42 ... Workpiece 43 ... Lower pot 44 ... Upper pot

Claims (3)

It is a method of manufacturing a cooking pot having a substantially inverted conical cylindrical shape with a closed bottom and an upper end opened, and provided with a flange that protrudes radially outward between the bottom and the upper end opening. ,
A workpiece forming step for forming a metal workpiece that has a thickness including at least the upper portion from the flange, and
A hook body forming step of cutting or grinding the outer surface of the workpiece to form a hook body having the flange portion;
An outer surface processing step of forming a hollow coat layer in a region from the bottom surface portion of the outer surface of the hook body to the upper end opening;
An inner surface processing step of forming a fluorine coat layer in a region from the bottom surface portion of the inner surface of the hook body to the enamel coat layer;
Bei to give a,
The method further comprises a lower surface processing step of forming a buffer coating layer only on the lower surface of the bottom surface portion and the lower surface of the flange portion after the outer surface processing step or after the inner surface processing step. manufacturing method of cooking kettle to. In the hook body forming step, the outside surface the upper end of the workpiece, according to claim 1, characterized in that the cutting or grinding to form a locating flange portion protruding from the radially outwardly the collar portion Method for cooking cooking pots. It has a bottomed, generally inverted conical cylindrical shape with a closed bottom and an open top, and is detachably accommodated in the accommodating portion of the main body, and is accommodated inside by being heated by heating means disposed in the main body. A cooking pot for a heating cooker that heats food,
By cutting or grinding the outer side surface of the metal workpiece, a hook body having a flange portion protruding radially outward is provided between the bottom surface portion and the upper end opening, and
Forming a hollow coat layer on the outer surface from the bottom portion of the hook body to the upper end opening, and forming a fluorine coat layer on the inner surface of the hook body from the bottom portion to the enamel coat layer ;
A cooking pot for a heating cooker, wherein a buffer coat layer is formed only on the lower surface of the bottom portion and the lower surface of the flange portion, respectively .

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