KR101418169B1 - Method for forming cloisonne enamel in copper alloy - Google Patents

Abstract

There is provided a method of forming / decorating a base metal made of a copper alloy, which is made of copper as a main component and in which a different metal or nonmetal element is added to improve the characteristics, so that the original color of the cloisonna is well expressed. The method includes: a pretreatment step of placing a silver film on a protruding part of a press forming mold in which a pattern is formed to engrave a groove having a pattern of a specific shape on one surface of a base metal manufactured in a predetermined shape; A step of heating the part for decorating the cloisonne with a high temperature, placing the part for decorating the cloisonne on a protruding part of the press forming mold, pressing the press part with a press to form a depressed depression part with a silver foil on the surface of the base metal, ; A step of filling a glass glaze having an intrinsic hue into the formed glaze groove and heating the glass glaze so that the vitreous glaze melts onto the surface of the base metal; And a finishing step of polishing the base metal on which the cloisonna has been formed by polishing to reveal the inherent color of the cloisonne formed on the base metal.

Description

Method for forming cloisonne enamel in copper alloy "

The present invention relates to a method of forming a cloisonna on a base metal, and more particularly, to a base metal made of a copper alloy having copper as a main component and another metal or a non- To a method of forming / decorating a color so that it is well represented.

Korea has traditionally used metal spoons, chopsticks, and bowls. Examples are silverware-based dishes and copper (organic brass) alloy. Such metalware is more hygienic than wooden tableware, and is sensitive to human and toxic substances and oxidized substances, and is discolored to make it possible to identify human health condition. But it has been widely used for many purposes since it is tradition.

The tableware such as spoons and chopsticks which are made of silver as a main material is advantageous in that the metal structure is flexible as compared with iron-metal, so that the workability is advantageous. However, since the steel is weak in rigidity, it is easily bent and deformed. . Therefore, in Korea, silverware, rather than silverware, has been preferred to "brassware".

It is well known that the sterilization power of organic brassware called 'brass bowl' through bronze alloyed with tin in copper and brass alloyed with zinc in copper (organic food poisoning bacteria killing effect, 2003. 5. 24. pp235.2 ~ 235.2). Our ancestors immersed the parsley in a brass bowl or put a bronze spoon in a bowl to remove the leeches of the buttercups. The bactericidal effect of this food poisoning is presumed to be caused by copper ions.

Organic is divided into 'fetish' and 'fake' according to the production technique. Casting is a technique of pouring zinc and tin alloys into copper, and pouring copper and tin alloys into the mold. Especially, it is not harmful to the human body, and it has been widely used for tableware, cutlery, etc. It is widely used for percussion as well as color and sound.

The brass bowl, which has a new value as a 'health bowl' due to its sterilizing effect, its ability to react to toxic substances, The use of kitchen containers such as cutting boards and knives is expected to increase day by day. However, since the organic material made of copper and tin alloy has a single color, it can not easily form or decorate a decorative object such as a cloisonne although it has excellent function as a kitchen container, There is a problem that the frequency of use thereof is remarkably low.

In order to solve the above problems, a method of inlaid silver on brass is disclosed in the following patent documents. However, in the silver inlaid product disclosed in the above patent documents, a large amount of silver is consumed by forming an engraved pattern of a predetermined pattern in a main body of a metal material, filling a silver piece formed with a predetermined pattern into the engraved pattern, It was not a technical composition to form a cloisonne that expresses various patterns in various colors.

When a cloisonne is formed on a metal such as a copper alloy such as brass, cupro-nickel, german silver, etc. and a stainless steel, the color of the base metal is changed to black There was a problem of falling greatly. Normally, in order to decorate the base metal with cloisonne, a glassy glaze (cloisonne glaze) should be placed on the base metal and heated to a high temperature, for example, 900 to 950 ° C.,

At this time, when the vitreous glaze is heated to a high temperature, the base metal is inevitably heated, so that the surface of the base metal on which the vitreous glaze is placed is oxidized to have a dark color. That is, when the copper alloy is heated, the red copper is oxidized and changed into a dark color oxidizer copper (CuO), so that the bottom of the vitreous glaze, which is almost transparent in color, becomes black, there was.

Registration No. 10-0972410 (registered on July 20, 2010)

Accordingly, it is an object of the present invention to provide a method of forming a cloisono in which a color of the cloisonne is displayed in a unique color when a metal is used as a base substrate and the cloisonne is formed / decorated by heating the glassy glaze laid on or placed on the base substrate / ≪ / RTI >

Another object of the present invention is to provide a cloisonoe forming / decorating method in which a unique color of a vitreous glaze can be directly expressed even when the color of the base metal is changed when the vitreous glaze is melted and applied to the copper alloy.

Another object of the present invention is to provide a method of forming a cloisono by easily forming / decorating a cloisonna so that the original color of the glassy glaze can be easily expressed when the glassy glaze is placed on the copper alloy, Or decoration method.

According to an aspect of the present invention, there is provided a method of manufacturing a metal thin plate, comprising the steps of: forming a silver thin layer on a protruding portion of a press forming die, film; A step of heating a portion for decorating the cloisonne with a high temperature, placing the clay on a protruding portion of the press forming mold, pressing the press portion with a press to form a depressed depressed portion having a silver foil on the surface of the base metal, ; The formed glaze groove is filled with a vitreous glaze having an intrinsic hue, and the periphery of the glaze groove is heated at a temperature of about 800 to 950 DEG C for 50 seconds to 65 seconds to melt the vitreous glaze onto the surface of the base metal With a step forming a cloisonne; And a finishing step of polishing the base metal on which the cloisonna is formed to polish the base metal to reveal the inherent color of the cloisonne formed on the base metal.

According to another aspect of the present invention, there is provided a method of forming a cloisonne embossing groove having a specific pattern on a surface of a base metal processed in a specific form, a thin layer forming step of forming a thin layer; A glassy glaze having an intrinsic hue is filled in the glaze groove formed with the silver foil layer and the periphery of the glaze groove is heated at a temperature of about 800 to 950 DEG C for 50 seconds to 65 seconds so that the vitreous glaze is applied to the surface of the base metal A step of forming a cloisoner for melting and adhering; And a finishing step of polishing the base metal on which the cloisonna is formed to polish the base metal to reveal the inherent color of the cloisonne formed on the base metal.

The base metal is preferably a copper alloy containing copper as a main component and at least one selected from the group consisting of tin, zinc, nickel, aluminum, beryllium and manganese. For example, one of bronze, brass, silver (German silver), white copper, beryllium copper, aluminum bronze, or Manganese bronze can be used as the base metal.

The silver foil layer forming step may be performed by mixing at least one silver selected from silver, silver powder and silver powder with silver soldering fluxes powder, heating the silver foil to a temperature of about 800 to 900 ° C, And a silver foil layer is formed on the surface of the part.

The silver foil layer forming step may include forming a silver foil layer on the surface of the pattern groove by electroplating and depositing silver on the surface of the pattern groove with a predetermined thickness using an evaporator.

According to the method of forming a cloisonoble according to an embodiment of the present invention, it is possible to prevent the phenomenon that the cloisonne color due to the change of the surface color of the background metal, It is possible to easily form and / or decorate a beautiful cloisonnal with an inexpensive metal rather than a noble metal such as silver, etc., thereby improving the aesthetics of the metalwork.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing the construction of a forming mold for forming / or decorating a cloisonna with copper metal according to a preferred embodiment of the present invention. FIG.
FIG. 2 is a view showing an appearance of a base metal for forming and / or decorating cloisonna with copper metal according to a preferred embodiment of the present invention, and is an illustration of a spoon; FIG.
FIG. 3 is a view showing an example in which a pattern groove formed with a silver foil layer is formed on a specific portion of the base metal of FIG. 2 so as to form and / or decorate a cloak.
Fig. 4 is an enlarged view showing a cross section of the pattern groove of Fig. 3; Fig.
FIG. 5 is a cross-sectional view of the glaze grooves of FIGS. 3 and 4 filled with vitreous glaze; FIG.
FIG. 6 is a view showing a state in which a glass clay glaze filled in the pattern groove shown in FIG. 5 is heated to form and / or decorate a pattern of a base metal. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be noted that the embodiments of the present invention described below are intended to sufficiently convey the spirit of the present invention to those skilled in the art.

A cloisonné refers to a piece of ornament made by grinding a transparent or opaque vitreous glaze on a metal or ceramic base using a metal oxide as a coloring material. Such cloisonné decorations have been used to enhance the beauty of the tableware made of ceramics as well as various ornaments. The temperature at which the glaze coated on the base metal is melted and fired is about 700 ~ 900 ℃, and the color is beautiful. Since the cloisonne glaze is a complete inorganic material, it has eternity with the metal, There is an advantage to be able to do.

In the case of a metal that changes the color of the surface of the base metal when heated to the base metal with a temperature of about 700 ~ 950 ° C at which the melting point of the base metal is very low, A problem that glassy glaze can not be used occurs. This is because, when the transparent vitreous glaze is placed in the groove formed in the base metal and the glaze is melted by heating at a temperature of, for example, 900 ± 50 ° C., the color of the surface of the base metal is changed to black so that the accurate color of the transparent vitreous glaze is not expressed It does not have value as a decoration because it is expressed in the color of black series.

Examples of the base metal whose surface color is changed at such a high temperature as described above include copper alloys such as bronze, brass, nickel silver, white copper, beryllium copper, aluminum bronze and Manganese bronze including copper Stainless steel is included. Therefore, a cloisonne craft using such metal as a base metal could not form or decorate transparent cloisonne because it could not use a transparent glass glaze.

The present inventors have found that a silver (Ag) layer having no color change on the surface even when heated as high-temperature heat is formed as a thin film on a clay forming / decorative region of a base metal, and a transparent vitreous glaze is placed thereon, In this paper, we have discovered that the color of transparent glass glaze can be expressed as it is, and according to this finding, the process of forming / decorating cloisonna with base metal, which is made of spoons by melting transparent glass glaze on base metal such as copper alloy, .

Example 1

(Mold) M provided with an insertion groove (G: groove) engraved with a pattern (P: Pattern) for forming / decorating a cloak is prepared on the handle portion of the spoon. The top of the pattern P formed on the end of the prepared mold M is covered with the silver foil 5. That is, a part of the insertion groove G including the pattern P is covered with the silver foil 5, and then the silver foil 5 is put in a press (not shown) which presses at a constant pressure.

2, an example of a base metal formed / decorated with a cloisonne according to the present invention is a spoon consisting of a wide and recessed sake leaf 2, 1), and the cloisonna is formed in the syringe part (S), which is the end of the syringe bag (3) of the spoon. In order to form a cloisonna of a beautiful color by melting a transparent vitreous glaze to the spermatozoon part (S), the color of the part where the vitreous glaze melts should not change even when heated with high heat as described above.

At this time, the material of the spoon (1), that is, an example of the base metal, is a copper alloy containing copper as a main component and at least one selected from tin, zinc, nickel, aluminum, beryllium and manganese It is good to do. For example, one of bronze, brass, silver (German silver), white copper, beryllium copper, aluminum bronze, or Manganese bronze can be used as the base metal.

In the present invention, when a cloisonne is formed / decorated on a spermatozoon part (S), the part is washed with an acid to remove impurities derived from the depressed part, the surface is cleaned and then heat-treated first. The heat treatment of the syringe part (S) is performed by heating the syringe part (S) for about 50 seconds to 65 seconds with a flame of about 950 ° C. For example, it is preferable to perform heat treatment so as to be reddish to such an extent that warp degeneration does not occur.

In the embodiment of the present invention, the heating part S is heated by the flame of the torch. However, it can be seen that the heating part can be heated by a person skilled in the art. For example, it is obvious that the heat-treatment can be carried out by putting the part (S) of the spoon (1) into the burning furnace and heating it or putting it into a high-temperature kiln.

When the heat-treated Batam metal, that is, the barrel portion S of the spoon 1 is inserted into the insertion groove G engraved with the pattern P of the mold M as shown in Fig. 1 and the press is pressed at a high pressure The engraved groove portion 4 of the engraved portion is formed in the barrel portion S of the spoon 1 by the pattern P formed on the end of the insertion groove G of the mold M. [

At this time, the silver foil 5 covered with the pattern P of the mold M is thermally cured and recorded by the high heat of the syringe portion S maintaining a high heating temperature, And is adhered to the surface of the main surface including the groove portion 4 formed in the recessed portion 4 as shown in Figs. 3 and 4.

5, a transparent vitreous glaze 6 is placed on the upper part of the silver foil 5 of the glaze groove part 4 formed in the spoon part S of the spoon 1 as shown in FIGS. 3 and 4 by the above- , The arrangement of the transparent vitreous glaze 6 is designed with the desired pattern. At this time, it is preferable to use pins, brushes or the like for the placement design of the vitreous glaze 6.

When the placement design of the transparent vitreous glaze 6 on the silver foil 5 layer formed on the glaze groove part 4 of the sparkle part S of the spoon 1 is completed by the above process, Is heated on the bottom surface of the sparkle portion S of the spoon 1 with a flame of a torch having a flame temperature of 800 ° C to 900 ° C for 55 seconds to 65 seconds to form a transparent vitreous glaze (6) is melted and the clay clay (6a) is fired to form (decorate) a cloisonne pattern.

When the flame of the torch having the flame temperature of 800 to 900 DEG C is applied to the bottom surface of the spool portion S of the copper alloy material as described above and the heat treatment is performed, The color change due to the oxidation of the surface of the base metal of the copper alloy is prevented from being generated at the upper portion of the silver foil 5 even if the high temperature heat treatment is performed on the silver wire portion S of the spoon 1, Not exposed. A torch flame having a flame temperature of 800 to 900 DEG C is applied to the bottom surface of the barrel portion S to melt the transparent vitreous glaze 5 placed on the silver foil 5 of the pattern groove portion 4, As a result, the color of the transparent vitreous glaze 5 is beautifully displayed as it is at the top.

If the temperature of the flame of the torch is lower than 800 ° C., the glass glaze 5 filled in the glaze groove portion 4 formed in the glaze portion S does not melt easily and the glaze 5 is not strongly attached to the spoon 1, The sintering temperature of the vitreous glaze 5 and the time of the sintering of the vitreous glaze 5 are in the range of 800 to 900 DEG C It is best to heat with a flame of a torch having a flame temperature for 55 seconds to 65 seconds.

When the cloisonne 6a is formed / decorated by the above process, the spoon 1 is cooled and dried at room temperature for about 2 to 3 minutes at room temperature, polished and polished, and the base metal of the copper alloy is spoon 1) and the cloisonne 6a are polished so as to express their unique colors.

As described above, in the method of forming a cloisoname according to an embodiment of the present invention, unoxidized silver foil is formed on the surface of a base metal oxidized by a high-temperature heat treatment, a transparent vitreous glaze is applied and fired on the top surface thereof, So that the cloisonne color of the transparent vitreous glaze on the metal surface of the copper alloy system can be beautifully formed.

Example 2

Example 2 is a method in which a tongue groove portion 4 is first formed on a tongue portion S of a spoon 1 as a base metal and then a silver soldering flux powder mixed with silver The silver or silver solution was added and the bottom surface of the silver part S was sufficiently heated by a flame of torch at about 950 ° C. for about 50 seconds to 65 seconds to dissolve the silver powder or silver solution filled in the silver groove part 4, As shown in Fig.

At this time, the gland portion 4 of the spoon 1 is inserted into the insertion groove I of the mold M as shown in Fig. 1 and is pressed by a press . It is preferable to apply this method as far as possible because it is possible to form a clear flap 4 by heat-treating the flap portion S of the spoon 1 into the mold M and joining it with a press. As described above, the process after the transparent vitreous glaze 6 is filled in the upper part of the silver foil 5 of the glaze groove part 4 formed in the barrel portion S as described above.

Example 3

The embodiment 3 is characterized in that after forming the tear grooves 4 on the tear portion S of the spoon 1 as a base metal and then forming the tear layer 5 on the surface of the tear grooves 4 by an electroplating method The remaining process is the same as the process described above, except that silver is deposited on the surface of the pattern groove 4 with a predetermined thickness using an evaporator.

1 is a spoon, 2 is a sake leaf, 3 is a sake bag, S is a syringe part, 4 is a patterned groove, 5 is silver paste, 6 is a vitreous glaze, 6a is a cloisonne, M is a mold,

Claims (4)

A method for forming a cloisonne pad on a copper alloy, comprising the steps of: pre-treating a silver foil film on a protruding portion of a press forming die having a pattern protruding thereon for engraving a groove having a pattern of a specific pattern on one surface of a base metal, ; A step of heating a portion for decorating the cloisonne with a high temperature, placing the clay on a protruding portion of the press forming mold, pressing the press portion with a press to form a depressed depressed portion having a silver foil on the surface of the base metal, ; A step of filling a glass glaze having an intrinsic hue into the formed glaze groove and heating the glass glaze so that the vitreous glaze melts onto the surface of the base metal; And a finishing step of polishing the base metal on which the cloisonna is formed by polishing to reveal the inherent color of the cloisonne formed on the base metal. A method of forming a cloisonne pad on a copper alloy, comprising the steps of: forming a pattern groove having a specific shape on one surface of a base metal processed in a specific form; and forming a silver foil layer ; Forming a cloister for filling a glassy glaze having an intrinsic hue into the pattern groove formed with the silver foil layer and heating the glassy glaze to melt on the surface of the base metal; And a finishing step of polishing the base metal on which the cloisonna is formed by polishing to reveal the inherent color of the cloisonne formed on the base metal. [3] The method according to claim 2, wherein the silver layer forming step comprises mixing silver soldering flux powder with at least one silver selected from silver, silver powder and silver, placing the silver soldering flux powder in the silver groove part and heating to form a silver foil layer on the surface of the silver groove part Wherein the copper alloy has a thickness of less than about 1 mm. The method as claimed in claim 2, wherein the silver foil layer forming step comprises forming a silver foil layer on the surface of the pattern groove by electroplating and depositing silver on the surface of the pattern groove with a predetermined thickness using an evaporator A method for forming a cloisonne on a copper alloy which is characterized by:

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