KR20170021186A - Manufacturing method of coated cooking vessel by drawing process and its coated cooking vessel - Google Patents

Manufacturing method of coated cooking vessel by drawing process and its coated cooking vessel Download PDF

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Publication number
KR20170021186A
KR20170021186A KR1020160004602A KR20160004602A KR20170021186A KR 20170021186 A KR20170021186 A KR 20170021186A KR 1020160004602 A KR1020160004602 A KR 1020160004602A KR 20160004602 A KR20160004602 A KR 20160004602A KR 20170021186 A KR20170021186 A KR 20170021186A
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South Korea
Prior art keywords
coating layer
aluminum plate
coating
firing
drying
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KR1020160004602A
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Korean (ko)
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KR101818418B1 (en
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장성웅
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주식회사 남선
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002—Pretreatement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/24—Pressing or stamping ornamental designs on surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
    • B44C3/08—Stamping or bending
    • B44C3/085—Stamping or bending stamping
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a coated cooking vessel using drawing processing and a coated cooking vessel thereof.
The present invention relates to a process for preparing a coated cooking vessel using a drawing process of an aluminum plate, a pretreatment process using electrolysis, which is a comparatively sensitive working process, and an aluminum plate mechanical roughening process before a fluorine resin spin coating process, It is possible to prevent the cause of defects due to unnecessary external factors in pretreatment using electrolysis and spin coating with fluorine resin in order to form pattern designs of various pattern shapes desired through physical engraving such as embossing or embossing Thus, it is possible to diversify the product through designing various patterns of the pattern on the inner surface of the fluororesin coating layer while improving the durability of the inner surface of the fluororesin coating layer.

Description

Technical Field [0001] The present invention relates to a method for manufacturing a coated cooking vessel using a drawing process,

The present invention relates to a method of manufacturing a coated cooking vessel using drawing processing and a coated cooking vessel using the same, and more particularly, to a method of manufacturing a coated cooking vessel using a precoating method, So that it can be formed.

Generally, aluminum is widely used in the production of various kinds of cooking vessels used for cooking food, which is superior in thermal conductivity, handleability and moldability to other metals.

However, in case of such an aluminum cooking vessel, due to inherent characteristics of aluminum, its strength and corrosion resistance are weak, and when it is exposed to heat or salt, it causes discoloration and surface damage. Also, since food can not be easily pressed and cooked properly, An anodic oxidation coating layer is formed, or a coating layer is formed of various materials to perform surface treatment.

Examples of the method of manufacturing a cooking vessel using aluminum include a plate material forming method (drawing processing) using a largely rolled aluminum plate and a casting forming method such as die casting. In the case of drawing processing, It is possible to produce a cooking vessel of a desired shape, so that it can be manufactured at a low cost and quickly, which is advantageous for mass production and can enhance price competitiveness. Therefore, when manufacturing various cooking vessels, Widely used,

As a method of forming a coating layer for forming a coating layer on the inner surface of the aluminum cooking vessel using drawing processing, there are a precoating method in which an inner surface of an aluminum plate is coated and then drawn to form a cooking vessel, And a post-coating method in which a cooking vessel is formed and spray-coated on the inner surface thereof. Typical prior art related to the pre-coating method of such a coating layer forming method is disclosed in Patent Publication No. 10-1995-0013598, Alloy surface treatment method '.

The above-mentioned Patent Publication No. 10-1995-0013598 discloses a method for forming a coating layer on the inner surface of an aluminum plate during the production of a coated cooking vessel using a micro-roughened layer and an oxide layer obtained through electrolysis as a base, Corrosion resistance and non-tackiness, and can soften the softening phenomenon caused by heat in the process of firing the coating layer after coating, thereby improving the work hardening.

However, in recent trend of kitchen appliances industry, in addition to excellence inherent to surface treatment, it is intended to increase design value by adding various pattern designs to a coating layer on the inner surface of a cooking container through pad printing or the like, Method. However, when applied to a pre-coating method such as Patent Publication No. 10-1995-0013598, a pattern design is formed between first and second spin coatings to form an inner coating layer, There is a risk of staining due to the pads when the pattern design is formed through the pad printing after the spin coating for spin coating and the pattern design during the spin coating of the inner coating layer interferes with the flow of the coating agent, There is a possibility that it will be easily buckled by weakening the bonding strength of the pattern or the design. In the manufacture of coated cookware applying the pre-coating method to the results there is a situation it is believed to be difficult to form a periodic pattern design on the inner coating layer is an urgent countermeasure for it.

Patent Publication No. 10-1995-0013598 'Surface Treatment Method of Aluminum or Aluminum Alloy'

The present invention relates to a method of manufacturing a coated cooking vessel using a precoating method for forming a coating layer on the inner surface of an aluminum plate and then drawing the same to form a cooking vessel, And a method for manufacturing a coated cooking vessel using the same.

A method for manufacturing a coated cooking vessel using the drawing process of the present invention for achieving the above object is characterized in that a patterned design is formed on the inner surface of a prepared aluminum plate by mechanical roughing treatment, The fluororesin coating layer is formed on the inner surface of the pretreated aluminum plate by spin coating one or more times on the inner surface of the pretreated aluminum plate, followed by drying and firing to form a fluororesin coating layer. After the fluororesin coating layer is formed, A plate is drawn to form a cooking vessel having a desired shape, an electromagnetically induced heating layer is selectively formed on the outer bottom surface of the shaped cooking vessel, the outer surface of the cooking vessel is mechanically roughened after the formation of the electromagnetic induction heating layer A roughened coating layer is formed on the outer surface of the roughened cooking vessel, and an outer surface layer Forming a top coat layer on the outer surface of the cooking container after formation of an optional outer surface pattern design and drying and firing the top coat layer including the undercoat layer and pattern design after formation of the top coat layer to obtain a completed coated cooking container .

The present invention relates to a method of manufacturing a coated cooking vessel using a drawing process of an aluminum plate and a method of manufacturing a coated cooking vessel using an aluminum plate, It is possible to form a pattern design with various pattern shapes desired through a physical imprint so that the cause of defects due to unnecessary external factors in the pretreatment work using electrolysis and the fluoropolymer spin coating operation can be prevented in advance, And the durability of the fluororesin coating layer on the inner surface of the aluminum fluoride resin coating layer is not influenced at all, the inner surface of the aluminum fluoride resin coating layer can be provided with a desired pattern design of various patterns, so that the inner surface of the aluminum plate is coated with the fluororesin, Method of Coated Cooking Container It is possible to diversify the product through the pattern design at the time of manufacturing and also to increase the design value.

Figure 1: Manufacturing process diagram of the present invention

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

In describing the present invention, however, a general description of a general manufacturing method for obtaining a coated cooking vessel by drawing an aluminum plate having a coating layer on its inner surface will be omitted, A detailed description will be omitted if it is determined that the present invention may be unnecessarily blurred.

In the present invention, the term " aluminum " includes all aluminum alloys whose main component is aluminum.

The present invention relates to an aluminum plate preparing step (10) for preparing a rolled aluminum plate, an aluminum plate inner pattern design forming step (12) for forming a physical pattern design on the inner surface of the prepared aluminum plate An aluminum plate inner surface mechanical roughening treatment step 14 for mechanically roughening the inner surface of the aluminum plate on which the pattern design is formed, an aluminum plate inner surface pretreatment for pretreating the inner surface of the roughened aluminum plate through electrolysis, An aluminum plate inner-surface fluororesin spin coating step (18) for forming a fluororesin coating layer by spin-coating a fluororesin on the inner surface of the pre-treated aluminum plate; an aluminum plate (20) an inner fluororesin coating layer drying and firing step (20), a second spin coating of a fluororesin selectively on the dried and calcined fluororesin coating layer A second fluororesin spin coating step (22) for forming a second fluororesin coating layer on the inner surface of the aluminum plate; a second fluororesin coating layer drying and firing step (22) for drying and firing the inner surface second coating layer 24, an aluminum plate drawing processing step (26) of drawing an aluminum plate by drying and firing the second fluororesin coating layer to form a cooking vessel, and an aluminum plate drawing processing step (26) An outer surface mechanical induction heating layer forming step (28) for mechanically roughening the outer surface of the cooking container after the formation of the electromagnetic induction heating layer, a roughening step (32) for forming a lower coating layer on the outer surface of the cooked container, and a cooking cavity (32) for drying the coated lower coating layer for forming an optional outer surface pattern design An outer surface coating layer drying step (34), a cooking container outer surface pattern design forming step (36) for selectively forming an outer surface pattern design on the outer surface of the cooking container after drying the undercoat layer, And an outer coating layer drying and firing step (40) for drying and firing the upper coating layer together with the coated lower coating layer and inner surface pattern design.

The aluminum plate preparing step (10) for preparing the aluminum plate rolled in the present invention is a step for preparing the aluminum plate for preparing the rolled aluminum plate, in which the thickness and flatness of the bottom and side portions required for the coated cooking vessel to be obtained, Aluminum alloy selected in accordance with physical properties and the like is rolled into a plate.

It is needless to say that the outer shape of the aluminum plate may be formed into various shapes such as a disk or a rectangular plate depending on the shape of the cooking container to be obtained.

The aluminum plate inner pattern design forming step (12) for physically forming the pattern design on the inner surface of the prepared aluminum plate may be performed by pressing the inner surface of the prepared aluminum plate using a press machine or a laser processing machine, .

The aluminum plate inner surface pattern forming step 12 is performed prior to the aluminum plate inner surface preprocessing step 16, which is a sensitive manufacturing process. The aluminum plate inner surface pattern designing step 12 may be performed by a specific means for physically forming the pattern design, But may be made after the cotton processing step 14.

That is, when a pressing machine in which the pattern design is relatively deeply used in the aluminum plate inner pattern design forming step 12 is used, the aluminum plate inner surface pattern design forming step 12 precedes the aluminum plate inner surface mechanical surface roughening processing step 14 In the case of using a laser processing machine in which the pattern design is relatively shallow in consideration of the processing cost and the like, the aluminum plate inner pattern design forming step 12 is performed after the aluminum plate inner surface mechanical roughening processing step 14 .

Therefore, in the present invention, the aluminum plate inner surface pattern design forming step 12 is included in the technical scope of the present invention even if it is provided after the aluminum plate inner surface roughening processing step 14.

Further, the pattern design formed in the aluminum plate inner surface pattern design forming step 12 may be a letter or a pattern, or may be partially formed on a desired portion of the inner surface of the aluminum plate, or may be formed as a whole.

In addition, the inner surface mechanical roughening treatment step 14 for mechanically roughening the inner surface of the aluminum plate on which the pattern design is formed increases the roughness of the inner surface of the aluminum plate by the roughening treatment using a brush or a sand blast, Thereby maximizing the activated surface area required in step (16) and fluororesin spin coating step (18).

The inner surface pretreatment step 16 of the aluminum plate for pretreating the inner surface of the roughened aluminum plate through electrolysis comprises a step of micronizing the inner surface of the mechanically roughened aluminum plate by electrolysis, (14) to remove various foreign substances adhering to the surface of the substrate, to maximize the mechanical roughening effect and to perform the subsequent spin coating of the fluororesin (18) The adhesion strength of the fluororesin coating layer at the time of use is increased so that corrosion resistance for corrosion prevention by salt water is improved when the cooking vessel is used.

An aluminum plate inner-surface fluororesin spin coating step 18 in which a fluororesin coating layer is formed by spin-coating a fluororesin on the inner surface of the pretreated aluminum plate is carried out by spinning a nozzle or the like on the aluminum plate in a state in which the aluminum plate is rotated by the rotating means When the liquid fluororesin is supplied in an appropriate amount, the supplied fluororesin spreads radially and the inner surface of the aluminum plate is entirely coated to form a fluororesin coating layer.

The drying and firing step (20) of drying and firing the inner surface fluorine resin coating layer for drying and firing the spin-coated fluorine resin coating layer is performed by applying heat of 100 to 150 ° C for 3 to 7 minutes to a spin- After the moisture of the resin coating layer was removed, the fluororesin coating layer was reorganized into a vitrified state by heating the dried fluororesin coating layer at a temperature of 380 to 420 ° C. for at least 5 minutes. The fluororesin coating layer was re-crystallized by firing. .

Also, an aluminum plate inner surface second fluororesin spin coating step 22, in which a second fluororesin coating layer is formed by spin coating a second fluororesin on the dried and baked fluororesin coating layer, When a liquid fluoride resin is supplied on the aluminum plate in an appropriate amount using a nozzle or the like, the supplied fluororesin diffuses in a radial manner, and the inner surface of the aluminum plate is entirely coated to form a second fluororesin coating layer.

The drying and firing step (24) of the inner surface second fluororesin coating layer for drying and firing the spin coating second fluororesin coating layer (24) is performed by heating the fluororesin coating layer, which is secondarily spin coated on the inner surface of the aluminum plate, After removing moisture of the fluororesin coating layer for 3 to 7 minutes, the fluororesin coating layer was re-arranged in a vitrified state by firing at a temperature of 380 to 420 ° C. for at least 5 minutes to the dried fluororesin coating layer. So that they are firmly joined to each other.

An aluminum plate inner surface second fluororesin spin coating step (22) for spin-coating a fluororesin secondarily on the fluororesin coating layer formed on the inner surface of the aluminum plate, and an inner surface 2 of the aluminum plate for drying and firing the spin coated second fluororesin coating layer The drying and firing step (24) of the second fluororesin coating layer is intended to further strengthen the inner surface of the fluororesin coating layer of the aluminum plate. It is not necessarily required that the coating is selectively performed depending on the characteristics and quality of the coated cooking chamber to be obtained shall.

Further, the temperature at the time of drying and firing of the fluororesin coating layer after the formation of the fluororesin coating layer does not have to be maintained at a given temperature from the beginning, and the heating is started at a temperature lower than a given temperature so that drying is performed After drying, the temperature is gradually increased and the firing is immediately carried out. In this case, the total heating time for drying and firing can be expected to be about 12 to 25 minutes.

In addition, the aluminum plate drawing processing step 26 for forming the cooking vessel by drawing and processing the aluminum plate after drying and firing of the second fluororesin coating layer is performed by drawing an aluminum plate so that the coated fluororesin coating layer forms the inner surface Shape the cooked juice.

The cooking cavity outer surface electromagnetic induction heating layer forming step (28) for selectively forming an electromagnetic induction heating layer on the outer bottom surface of the drawing-processed cooking cavity comprises forming an electromagnetic induction heating plate on the outer bottom surface of the cooking cavity, To have a function as an electromagnetic induction heating cooking vessel. Such an electromagnetic induction heating layer is formed selectively according to the coated cooking vessel to be obtained, but is not necessarily required.

In addition, the external surface mechanical roughening treatment step 30 for mechanically roughening the external surface of the cooking container after the formation of the electromagnetically induced heating layer is performed by using a brush, a sand blast or the like, The roughening treatment of the outer surface increases the roughness so as to maximize the activated surface area necessary for the subsequent outer coating step 32 and the outer surface coating step 38 of the cooking vessel.

In addition, the outer surface coating step (32) for forming the undercoating layer on the outer surface of the roughened surface of the cooking vessel may include spraying the outer surface of the roughened surface of the cooking vessel with a coating selected from heat resistant paint, fluororesin and ceramic, To form a lower coating layer.

Also, in the drying step (34) for drying the undercoating layer for drying the undercoating layer to form an optional outer pattern design, the undercoating layer is dried by applying heat to the undercoating layer according to the kind of the used coating material, When a heat-resistant paint is used as the undercoating agent, heat is applied at a temperature of 130 to 170 ° C for 10 to 15 minutes. If a fluororesin is used, heat is applied at a temperature of 100 to 150 ° C for 10 to 15 minutes If ceramic is used, heat it at 100 ~ 150 ℃ for 15 ~ 20 minutes and dry it.

In addition, the outer container pattern design forming step (36) for forming the outer container pattern design selectively on the dried undercoat layer may include the step of forming the outer container with the same kind of coating material as the coating material used for forming the undercoat layer such as heat resistant paint, fluororesin, Print the coating with a screen printer or pad printer to form an outer pattern design.

At this time, the outer surface pattern design formed on the outer surface of the cooking container may be a letter or a pattern, or may be partially formed on a desired portion of the outer surface of the cooking container or may be formed as a whole.

Also, the outer surface coating step 38, which forms an upper coating layer on the outer surface of the cooking vessel after the formation of the optional outer surface pattern design, may also be applied to the outer surface of the cooking pot, The coating layer and the outer surface pattern are coated with a coating agent such as a transparent or translucent coating agent on the outer surface of the cooking vessel as a whole to form a top coating layer and a top coating layer for protecting the outer coating pattern and the outer surface pattern design.

The coating layer drying and firing step (40) on the outer surface of the cooking vessel for drying and firing the upper coating layer together with the coated lower coating layer and the outer pattern design may be performed by applying heat to the upper coating layer and the pattern design and the lower coating layer Dried and then baked to rearcoat the undercoat layer and the outer surface pattern design and the top coat layer by firing, and then recrystallized while being cooled to firmly bond to the outer surface of the cooking container.

The drying and firing of the undercoating layer and the outer surface pattern design and the top coat layer are carried out at different temperatures and times depending on the type of coating agent used for the undercoating and outer pattern design printing and topcoating. The heating is carried out at 130 to 170 ° C. for 10 to 15 minutes and the drying is carried out at a temperature of 270 to 310 ° C. for 15 to 20 minutes. When a fluororesin is used, drying is performed at a temperature of 100 to 150 ° C. 10 to 15 minutes, and firing after drying is performed by heating at 380 to 420 ° C. for 5 minutes or more. When ceramic is used, drying is performed by heating at 100 to 150 ° C. for 15 to 25 minutes, Drying and firing are carried out at 230 to 270 ° C for 15 to 20 minutes.

In the present invention, when the cooking container outer surface pattern design forming step 36 is omitted, the subcoat layer drying step 34 is omitted so that the outer surface of the cooking container after the subcoating step 32 is dried, 38) to form an upper coating layer on the lower coating layer, and then drying and firing the outer coating layer on the outer surface of the cooking vessel for drying and firing simultaneously the lower coating layer and the upper coating layer. In this case, The temperature and time for drying and calcining the coating layer will vary according to the coatings used as described above.

Accordingly, the present invention relates to a method for manufacturing a coated cooking vessel using drawing processing of an aluminum plate, which comprises performing a preliminary treatment using electrolysis, which is a relatively sensitive work process, and a mechanical roughening treatment before fluoropolymer spin coating, It is possible to prevent the occurrence of defects due to unnecessary external factors in pretreatment using electrolysis and spin coating with fluorine resin in advance by forming a pattern design of various pattern shapes desired through physical engraving such as embossing It is possible to design various desired patterns of patterns on the inner surface coating layer without affecting the durability of the inner surface coating layer at all.

As described above, according to the present invention, the physical aluminum plate inner pattern design forming step 12 may be provided after the aluminum plate inner surface mechanical surface-roughening processing step 16 according to the physical pattern design forming means used, The method may further include the step of forming an outer surface electromagnetic induction heating layer 28 between the plate drawing processing step 26 and the cooking vessel outer surface mechanical surface roughening processing step 30, And the cooking container outer surface pattern design forming step (36) after the drying of the undercoat layer between the outer surface coating step (38) of the cooking container and the cooking container outer surface coating forming step (38) It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, In the art it will be apparent in the person of ordinary skill.

(10) -Aluminum plate preparation step
(12) - Step of forming aluminum plate inner pattern design
(14) - Aluminum plate internal surface roughening treatment step
(16) Aluminum plate inner surface pretreatment step
(18) - aluminum plate inner surface fluorine resin spin coating step
(20) - Aluminum plate inner surface fluoropolymer coating layer drying and firing step
(22) Aluminum plate inner surface Secondary fluoropolymer spin-coating step
(24) - Aluminum plate inner surface Secondary fluoropolymer coating layer drying and firing step
(26) - Aluminum plate drawing processing step
(28) - Step of forming the electromagnetic induction heating layer on the outer surface of the cooking vessel
(30) - Mechanical roughening treatment step outside the cooking vessel
(32) - Outer surface coating step of cooking vessel
(34) - Step of drying the outer coating layer of the cooking vessel
(36) - Formation stage of outer pattern design of cooking vessel
(38) - Coating step on outer surface of cooking vessel
(40) - outer surface of cooking vessel top coating layer drying and firing step

Claims (14)

An aluminum plate preparing step (10) for preparing an aluminum plate having a desired thickness and outer shape;
An aluminum plate inner pattern design forming step (12) for physically forming a pattern design on the inner surface of the prepared aluminum plate;
An aluminum plate inner surface mechanical roughening treatment step (14) for mechanically roughening the inner surface of the aluminum plate on which the pattern design is formed;
An aluminum plate inner surface preprocessing step (16) for pretreating the inner surface of the roughened aluminum plate through electrolysis;
An inner surface fluororesin spin coating step 18 of an aluminum plate to form a fluororesin coating layer by spin-coating a fluororesin on the inner surface of the pretreated aluminum plate;
Drying and firing (20) an aluminum plate inner surface fluororesin coating layer for drying and firing the spin-coated fluororesin coating layer;
An aluminum plate drawing processing step (26) of forming an aluminum plate by drying and firing the fluororesin coating layer to form a cooking vessel;
An outer surface mechanical surface roughening treatment step (30) of mechanically roughening the outer surface of the drawn cooking container;
A baking container outer surface coating step (32) for forming a primer coating layer by coating the outer surface of the roughened surface of the baking container with a coating material selected from heat resistant paint, fluororesin and ceramic;
An outer surface coating step (38) of forming an upper coating layer on the outer surface of the cooking vessel on which a lower coating layer is formed by coating a coating agent selected from heat resistant paint, fluororesin and ceramic, and a transparent or translucent coating agent;
A method for manufacturing a coated cooking vessel using drawing processing including a coating layer drying and firing step (40) on an outer surface of a cooking vessel for drying and firing a lower coating layer and an upper coating layer. 2. The method according to claim 1, wherein the aluminum plate inner surface pattern design forming step (12) is a step of forming a pattern design by engraving letters or patterns on an inner surface of an aluminum plate with engraving or embossing partially or wholly using a press machine or a laser processor Wherein the method comprises the steps of: The method as claimed in claim 1, wherein a fluororesin is spin-coated on the dried and calcined fluororesin coating layer between the aluminum fluoride coating layer drying and firing step (20) and the aluminum plate drawing processing step (26) A second fluororesin spin coating step 22 of an inner surface of the aluminum plate and a second fluororesin coating layer drying and firing step 24 of an inner surface of the aluminum plate for drying and firing the spin coated second fluororesin coating layer A method of manufacturing a coated cooking vessel using a drawing process. The method as claimed in claim 1, further comprising a step of forming an electromagnetic induction heating layer on the outer bottom surface of the cooking vessel drawn between the aluminum plate drawing processing step (26) and the cooking vessel outer surface mechanical roughening processing step (30) And a heating layer forming step (28). The method as claimed in claim 4, wherein the cooking vessel outer surface induction heating layer forming step (28) comprises forming an electromagnetic induction heating plate on the outer bottom surface of the cooking vessel or spraying an electromagnetic induction heating material to form an electromagnetic induction heating layer Characterized in that the method comprises the steps of: The method of claim 1, further comprising: a step of drying a lower surface coating layer (34) for drying the lower coating layer between the upper surface coating step (32) of the cooking container and the upper surface coating step (38) And a cooking container outer surface pattern design forming step (36) for forming an outer surface pattern design on the outer surface of the container. The method according to claim 1 or 3, wherein the aluminum fluoride resin coating layer drying and firing step (20) and the aluminum plate inner surface second fluororesin coating layer drying and firing step (24) Wherein the coating is performed for 3 to 7 minutes and the firing is performed for 15 to 25 minutes by heating at 380 to 420 ° C. The method of claim 1, wherein the cooking vessel outer surface coating step (32) and the outer surface coating step (38) of the cooking vessel are respectively spray coated with a coating material selected from heat resistant paint, fluororesin and ceramic to form an upper coating layer and an upper coating layer Wherein the method comprises the steps of: The method of claim 1, wherein the coating layer and the upper coating layer are formed of a heat-resistant paint in the coating layer drying and firing step (40) on the outer surface of the cooking container for drying and firing the lower coating layer and the upper coating layer. Wherein the coating is performed for 10 to 15 minutes and the firing is performed for 15 to 20 minutes by heating at 270 to 310 ° C. The method according to claim 1, wherein the coating layer and the top coating layer are formed on the outer surface of the cooking vessel for drying and firing the lower coating layer and the upper coating layer. In the drying and firing step (40) Wherein the coating is performed for 10 to 15 minutes and the firing is performed for 5 minutes or more by heating at 380 to 420 ° C. The method of claim 1, wherein the coating layer and the upper coating layer are formed on the outer surface of the cooking vessel for drying and firing the lower coating layer and the upper coating layer. When the lower coating layer and the upper coating layer are made of ceramic in the coating layer drying and firing step (40) To 25 minutes, and firing is performed for 15 to 20 minutes by heating at 230 to 270 ° C. An aluminum alloy is rolled to prepare an aluminium plate, a physical pattern design such as a negative angle or embossing is formed on the inner surface of the prepared aluminum plate, the inner surface of the aluminum plate on which the pattern design is formed is mechanically roughened, The inner surface of the plate is pretreated by electrolysis, the inner surface of the pretreated aluminum plate is spin-coated with fluorine resin, followed by drying and firing to form a fluorine resin coating layer, and an aluminum plate is drawn to form an inner surface of the baked fluorine resin coating layer Forming a lower coating layer on the outer surface of the roughened surface of the cooking container by using a heat-resistant paint, a coating material selected from fluororesin and ceramics on the outer surface of the roughened surface of the cooking container, mechanically roughening the outer surface of the drawn cooking container, On the outer surface of the cooking vessel where the undercoat layer is formed, the heat-resistant paint, the fluororesin, and the ceramic FIG coated cooking vessel, characterized in that the selection is the use of a coating during the coating of the coating layer is also transparent or formed by drying and firing, and then by using a coating agent consisting of a semi-transparent top coat to form a coating layer. 13. The cooking apparatus according to claim 12, wherein an electromagnetic induction heating plate is bonded to the outer bottom surface of the cooking vessel or an electromagnetic induction heating layer is sprayed by spraying the electromagnetic induction heating material before mechanically roughening the outer surface of the drawing cooking vessel Wherein the container is a container. 13. The method of claim 12, wherein an outer surface pattern design is formed on the outer surface of the cooking vessel using a coating agent such as a coating agent used for forming the upper coating layer and the upper coating layer prior to forming the upper coating layer after forming the lower coating layer Drawing-processed coated cooking vessels featured.
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KR101887859B1 (en) 2017-07-31 2018-08-13 주식회사 남선 Manufacturing method of coated cooking vessel with protective film and its coated cooking vessel
KR20190001256A (en) * 2017-06-27 2019-01-04 이현주 Cooker coated dot using the three dimensional printing type
KR20210113884A (en) * 2020-03-09 2021-09-17 하나티엔피 주식회사 Spray coating method for forming coating layer on cooking utensil

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KR20190001256A (en) * 2017-06-27 2019-01-04 이현주 Cooker coated dot using the three dimensional printing type
KR101887859B1 (en) 2017-07-31 2018-08-13 주식회사 남선 Manufacturing method of coated cooking vessel with protective film and its coated cooking vessel
KR20210113884A (en) * 2020-03-09 2021-09-17 하나티엔피 주식회사 Spray coating method for forming coating layer on cooking utensil

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