JP2019201794A - Manufacturing method for metal ornament - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal ornament excellent in design. SOLUTION: A step of obtaining a cylindrical first main body having a cavity and a through hole by casting using a first metal (steps S102 to S108), and filling the cavity and the through hole and at the same time the first main body. A step of applying a wax so as to cover the wax, and forming a wax application portion including a plurality of wax groove portions formed at predetermined intervals in the circumferential direction on the peripheral surface (step S110), and a gypsum mold formed using the first main body From the step (steps S112, S114) of forming a mold from which the wax application part has been removed, and a second metal having a melting point lower than that of the first metal is poured into the mold to form a plurality of metal groove parts corresponding to the wax groove parts. A step of forming a combined body in which the two metal bodies are combined with the first body (step S116), and the metal groove portion is cut by cutting the peripheral surface of the second metal body while rotating the combined body. , And a step (step S120) to expose the circumferential surface of the first body. [Selection diagram] Fig. 5

Description

  The present invention relates to a method for manufacturing a metal ornament.

The ring which is a metal ornament is manufactured by the lost wax casting method, for example. In recent years, metal ornaments in which dissimilar metals are integrally formed by casting have been proposed.
The following Patent Document 1 discloses a decorative article (ring) in which a base metal made of platinum and a secondary cast metal made of gold are combined. This ring is manufactured by performing lost wax casting twice. That is, a base metal is formed by the first lost wax casting, and a combined body in which the base metal is filled and bonded to the base metal is formed by the second lost wax casting. And a ring is manufactured by cutting the surface of a coupling body.

JP 2011-239877 A

  By the way, from the viewpoint of manufacturing a ring in which the pattern of the peripheral surface is formed of two metals, a hole or the like is formed in the base metal (first metal body), and the hole is filled with a secondary cast metal and bonded. There are cases in which the combined body is molded. In this case, in the second lost wax casting, a bonded body is formed by applying wax around the base metal. For this reason, the peripheral surface of the bonded body is likely to be non-uniform due to the application state of the wax, and since the base metal is covered with the secondary casting metal in the bonded body, the peripheral surface can be precisely cut. Have difficulty.

  Therefore, the present invention has been made in view of these points, and provides a metal decorative article having excellent design properties by appropriately cutting the peripheral surface of a joined body formed by casting a dissimilar metal multiple times. For the purpose.

  In one aspect of the present invention, a first metal body obtaining step of obtaining a cylindrical first metal body having a cavity and a hole by casting using the first metal, the cavity and the A wax application part in which a wax is applied so as to fill the hole and cover the first metal body, the wax application part including a plurality of wax groove parts formed at predetermined intervals in the circumferential direction on the peripheral surface is formed. An application portion forming step, a mold forming step of forming a mold from which the wax application portion has been removed from a gypsum mold formed using the first metal body covered with the wax application portion, and a first mold applied to the mold. A joined body forming step of casting a second metal having a melting point lower than that of the metal and forming a joined body in which a second metal body including a plurality of metal groove portions corresponding to the plurality of wax groove portions is joined to the first metal body. And the plurality of With the metal groove portion supported by a lathe chuck and positioning the combined body, the lathe cuts the peripheral surface of the second metal body with a blade while rotating the combined body, And a cutting process for exposing a peripheral surface.

  Moreover, the said application part shaping | molding process WHEREIN: It is good also as forming the said wax groove part in the outer peripheral surface of the said wax application part along the axial direction of a said 1st metal body.

  Further, in the cutting step, the lathe rotates the coupling body while the lathe rotates the coupling body in a state where the metal groove portion formed on the outer peripheral surface of the second metal body is supported by the chuck and the coupling body is positioned. Cutting the inner peripheral surface of the second metal body to expose the inner peripheral surface of the first metal body, and the inner peripheral surface of the first metal body after the first cutting step. The second cutting step of cutting the outer peripheral surface including the metal groove portion of the second metal body to expose the outer peripheral surface of the first metal body in a state where the bonded body is positioned with the chuck supported by the chuck. And may be included.

  Further, in the method of manufacturing the metal ornament, the groove processing step of cutting the bottom of the metal groove of the second metal body formed in the combined body forming step to expose the outer peripheral surface of the first metal body. In the cutting step, the metal groove portion whose bottom portion is cut by the groove portion machining step may be supported by the chuck to position the combined body.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the peripheral surface of the conjugate | bonded_body which shape | molded by casting dissimilar metals in multiple times can be cut appropriately, and the metal decoration excellent in the designability can be provided.

It is a figure for demonstrating an example of a structure of the metal ornament 1 which concerns on one Embodiment of this invention. It is AA sectional drawing of FIG. It is a figure for demonstrating an example of the geometric pattern of the metal ornament 1. FIG. 3 is a diagram for explaining an example of a configuration of a first main body 10. 3 is a flowchart for explaining a manufacturing process of the metal ornament 1. It is a schematic diagram which shows an example of a structure of the 1st prototype 110. FIG. It is a schematic diagram which shows the tree 200 with which the 1st prototype 110 is connected. It is a schematic diagram for demonstrating the 2nd prototype 120. FIG. 4 is a schematic diagram for explaining a part of the configuration of a combined body 40. FIG. It is a schematic diagram which shows the coupling body 40 after the metal groove part 32 was processed. It is a schematic diagram for demonstrating a 1st cutting process. It is a schematic diagram for demonstrating a 2nd cutting process.

<Composition of metal ornaments>
With reference to FIGS. 1-4, the structure of the metal ornament 1 which concerns on one Embodiment of this invention is demonstrated.

  Drawing 1 is a figure for explaining an example of composition of metal ornament 1 concerning one embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a diagram for explaining an example of the geometric pattern of the metal ornament 1. FIG. 4 is a diagram for explaining an example of the configuration of the first main body 10.

  The metal ornament 1 is a ring here as an example, and is formed by, for example, a lost wax casting method. The metal ornament 1 has a geometric pattern on the entire surface as shown in FIG. As shown in FIG. 2, the metal ornament 1 has a first body 10 and a second body 20 made of different metals. The first main body 10 is configured to surround the second main body 20. Specifically, the first main body 10 and the second main body 20 are firmly coupled and do not separate.

  The first body 10 is made of a first metal (for example, platinum). The first main body 10 is a hollow contour portion of a ring that is the metal ornament 1. Specifically, as shown in FIG. 4, the first main body 10 is a hollow body formed in a ring shape. Further, the entire outer peripheral surface of the first main body 10 is a curved surface. As shown in FIGS. 2 and 4, the first main body 10 includes a cavity 12, an outer surface portion 13, and a plurality of through holes 14.

  The cavity 12 is formed in a ring shape in the first main body 10 along the circumferential direction (an example of the main direction). The cavity 12 is formed in an elliptical shape as shown in FIG. 2, for example, so that the cross-sectional area of the first main body 10 is constant in the circumferential direction.

  As shown in FIG. 2, the outer surface portion 13 is a portion surrounding the cavity 12 and is exposed to the outside. The outer surface portion 13 has a constant thickness, and the thickness of the outer surface portion 13 (t2 in FIG. 2) is smaller than the thickness of the cavity 12 (t1 in FIG. 2). That is, in the first main body 10, the cavity 12 dominates the space. In addition, in the AA cross section orthogonal to the circumferential direction of the 1st main body 10, the width | variety of the cavity 12 (t1 of FIG. 2) is larger than the width | variety of the outer surface part 13 (t2 of FIG. 2).

  The through holes 14 are a plurality of holes penetrating the outer surface portion 13. As shown in FIG. 4, the through-hole 14 penetrates between the outer peripheral surface 10 a and the inner peripheral surface 10 b of the annular first main body 10. Each of the plurality of through holes 14 communicates with the cavity 12 as shown in FIG. Thus, the 1st main body 10 of the complicated structure which has the cavity 12 and the through-hole 14 can be shape | molded by performing lost wax casting after manufacturing a prototype with a 3D printer so that it may mention later.

  As shown in FIG. 4, the plurality of through holes 14 are provided so as to be scattered on the outer surface portion 13. Specifically, the plurality of through holes 14 are regularly scattered on the outer surface portion 13, so that the entire outer surface portion 13 is a geometric pattern portion. Here, the geometric pattern is a cloisonne pattern as shown in FIG. 4, but is not limited to this, and may be another pattern such as a checkered pattern. Thus, by forming various patterns on the outer peripheral surface of the metal ornament 1, the metal ornament 1 with high designability can be realized.

  The second body 20 is made of a second metal (for example, gold) different from the first metal. The melting point of gold, which is the second metal, is lower than the melting point of platinum, which is the first metal of the first body 10. Thus, the 1st main body 10 and the 2nd main body 20 can each be shape | molded by a casting method by using the metal from which melting | fusing point differs. Further, the color of the second metal of the second body 20 is different from the color of the first metal of the first body 10. Thereby, the metallic ornament 1 with a beautiful color is realizable.

  The second main body 20 is filled and connected to the first main body 10 which is a hollow body. Specifically, the second main body 20 is formed so as to fill the cavity 12 and the through-hole 14 of the first main body 10 that are in communication with each other, so that the second main body 20 is firmly coupled to the first main body 10. . As shown in FIG. 2, the second main body 20 includes a cavity filling portion 22 and a hole filling portion 24.

  The cavity filling part 22 is a filling part filling the cavity 12 of the first main body 10. Since the cavity filling portion 22 fills the cavity 12 formed in a ring shape of the first main body 10, it is a ring-shaped portion. Further, as shown in FIG. 2, the thickness (t1) of the cavity filling portion 22 is larger than the thickness (t2) of the outer surface portion 13 of the first main body 10.

  The hole filling part 24 is a filling part filling the through hole 14 of the first main body 10. The hole filling portion 24 fills all the through holes 14 that are discrete in the outer surface portion 13. As shown in FIG. 2, the hole filling portion 24 is connected to the cavity filling portion 22. Further, the surface of the hole filling portion 24 is located on the same plane as the surface of the outer surface portion 13 of the first main body 10. For example, the surface of the metal ornament 1 may be a smooth curved surface with no irregularities. However, the present invention is not limited to this, and fine irregularities may be formed on the surface of the hole filling portion 24 and the surface of the outer surface portion 13. Thereby, the metal ornament 1 excellent in aesthetics is realizable.

  In the above description, the thickness of the cavity 12 (t1 in FIG. 2) is larger than the thickness of the outer surface portion 13 (t2 in FIG. 2). However, the present invention is not limited to this. For example, the thickness (t1) of the cavity 12 may be smaller than the thickness (t2) of the outer surface portion 13.

<Production method of metal ornaments>
With reference to FIG. 5, the manufacturing method of the metal ornament 1 made of the above-described different metal will be described. In the manufacturing method of the metal ornament 1 described below, after the first main body 10 is formed with the first metal, the bonded body 40 including the second metal body in which the second metal is filled and bonded to the first main body 10 is formed. The metal decorative article 1 is obtained by molding and cutting the peripheral surface of the joined body 40.

  FIG. 5 is a flowchart for explaining a manufacturing process of the metal ornament 1. Below, it demonstrates for every process of the flowchart of FIG.

(First Prototype Molding Process: Step S102)
A first prototype 110 that is a prototype of the first main body 10 is molded. The first prototype 110 is formed by an inkjet 3D printer, for example, based on a model designed by 3D-CAD. Thereby, the 1st original 110 of the 1st main body 10 (refer FIG. 4) of complicated shape can be shape | molded.

  FIG. 6 is a schematic diagram illustrating an example of the configuration of the first prototype 110. The first prototype 110 is a wax prototype made of wax. As shown in FIG. 6, the first prototype 110 has a mold part 112 and a runner 114.

  The mold part 112 has the same shape as the first main body 10. That is, the mold part 112 has the same shape as the first main body 10 having the cavity 12 and the through hole 14. In FIG. 6, the cavity 12 and the through hole 14 are omitted for convenience of explanation.

  The runner 114 is a portion that becomes a passage portion through which metal flows during primary casting described later. The runner 114 has a central part 114a located at the center of the mold part 112 and a plurality of radiating parts 114b arranged to extend radially from the central part 114a. Each of the plurality of radiating portions 114b connects the central portion 114a and the inner peripheral surface 112a of the mold portion 112. The central portion 114a protrudes forward from the paper surface of FIG.

  Since the runner 114 has the central portion 114a and the radiating portion 114b in this way, when the first metal (platinum) is poured in the primary casting described later, the metal is placed in the mold portion 112 having a fine shape. It becomes easy to fill properly. In particular, platinum having a high melting point has low fluidity during filling, but by providing a plurality of radiating portions 114b, the mold portion 112 can be easily filled with platinum at an early stage.

(First gypsum mold forming process: step S104)
A first gypsum mold is molded using the first prototype 110. First, the first prototype 110 shown in FIG. 6 is connected to the tree 200 shown in FIG.

  FIG. 7 is a schematic diagram showing the tree 200 to which the first prototype 110 is connected. The tree 200 is made of wax. The tree 200 is also a portion that becomes a runner through which the first metal (platinum) flows during primary casting. Although one first prototype 110 is connected to the tree 200 as shown in FIG. 7, the present invention is not limited to this, and a plurality of first prototypes 110 may be connected.

  Then, after setting the tree 200 connected to the first prototype 110 inside the cylindrical body, the first gypsum mold is formed by injecting gel-like gypsum into the cylindrical body. In the molding of the first gypsum mold, vacuum defoaming may be performed to increase molding accuracy.

(First gypsum cavity forming process: step S106)
The wax forming the first prototype 110 and the tree 200 is removed from the first gypsum mold to form a first gypsum cavity that is a mold for primary casting. For example, by heating the first gypsum mold with a heat source, the wax in the first gypsum mold is dissolved and vaporized. Thereby, the 1st gypsum cavity of the same type as the 1st original mold 110 is fabricated in the 1st gypsum mold.

(Primary casting process: Step S108)
The first main body 10 is formed by primary casting using the first gypsum cavity and platinum which is the first metal. Specifically, after the platinum is poured into the first gypsum cavity and cooled, the primary casting including the runner is taken out from the first gypsum cavity. And the 1st main body 10 made from platinum is shape | molded by cutting and removing the part corresponded to a runner from a primary casting.

  As shown in FIG. 4, the first body 10 formed by primary casting is a cylindrical first metal body having a cavity 12 and a through hole 14. In the present embodiment, the above-described steps S <b> 102 to S <b> 108 correspond to a first metal body acquisition step for acquiring the first main body 10.

(Wax application process: Step S110)
A wax is applied to fill the cavity 12 and the through hole 14 of the first main body 10 and cover the first main body 10, and a wax application portion is formed on the first main body 10. For example, the worker manually forms a wax application portion by applying wax around the first body 10 and curing it. Hereinafter, the first main body 10 to which the wax is applied is referred to as a second prototype 120.

  FIG. 8 is a schematic diagram for explaining the second prototype 120. As shown in FIG. 8, in the second prototype 120, the wax application unit 150 covers the entire first main body 10. The wax application unit 150 is provided to fill the second metal (gold) during secondary casting described later. Although not shown in FIG. 8, the wax application unit 150 includes a portion in which the cavity 12 and the through hole 14 of the first main body 10 are filled with wax.

  As shown in FIG. 8, the wax application unit 150 includes a plurality of wax groove portions 152. A plurality of wax groove portions 152 are formed on the peripheral surface of the wax application portion 150 at predetermined intervals in the circumferential direction. Here, three wax groove portions 152 are formed at intervals of 120 degrees in the circumferential direction. The three wax groove portions 152 are formed at the same position in the radial direction from the center of the second prototype 120. Further, the wax groove 152 is formed along the axial direction of the first main body 10 on the outer peripheral surface of the wax application portion 150 that covers the cylindrical first main body 10. The cross-sectional shape of the wax groove 152 is, for example, an inverted trapezoidal shape.

  In the above description, the wax groove 152 is formed on the outer peripheral surface of the wax application unit 150 that covers the first main body 10, but the present invention is not limited to this. For example, the wax groove part 152 may be formed on the inner peripheral surface of the wax application part 150.

(Second gypsum mold forming step: step S112)
A second plaster mold is formed using the second prototype 120. First, the second prototype 120 shown in FIG. 8 is connected to a tree made of wax (here, the tree 200 shown in FIG. 7).

  The tree 200 is also a portion that becomes a runner through which the second metal (gold) flows during secondary casting. One or a plurality of second prototypes 120 can be connected to the tree 200. Then, after setting the tree to which the second prototype 120 is connected to the inside of the cylindrical body, the second gypsum mold is formed by injecting gel-like gypsum into the cylindrical body. Vacuum defoaming may also be performed during the molding of the second gypsum mold.

(Second gypsum cavity forming process: step S114)
The wax application part 150 and the tree 200 of the second prototype 120 are removed from the second plaster mold to form a second plaster cavity that is a mold for secondary casting. For example, by heating the second gypsum mold with a heat source, the wax in the second gypsum mold is dissolved and vaporized. Thereby, the 2nd gypsum cavity of the same type as the 2nd original mold 120 is fabricated in the 2nd gypsum mold. In addition, the 1st main body 10 made from platinum is contained in the 2nd gypsum cavity.

(Secondary casting process: Step S116)
By pouring a second metal (gold) having a melting point lower than that of the first metal (platinum) into the second gypsum cavity and performing secondary casting, the second metal body 30 made of gold is formed on the first body 10 made of platinum. The joined body 40 (see FIG. 9) joined is molded. Specifically, after casting gold into the second gypsum cavity and cooling, the secondary cast product including the runner is taken out from the second gypsum cavity. And the coupling body 40 is acquired by cutting and deleting the part corresponded to a runner from a secondary casting. The second metal body 30 of the combined body 40 is a portion that becomes the second main body 20.

  FIG. 9 is a schematic diagram for explaining a part of the configuration of the combined body 40. In the combined body 40, the second metal body 30 covers the entire first main body 10. As shown in FIG. 9, the second metal body 30 includes a plurality of metal groove portions 32 corresponding to the wax groove portions 152 on the outer peripheral surface. Three metal groove portions 32 are provided at intervals of 120 degrees in the circumferential direction on the outer peripheral surface. The three metal groove portions 32 are provided at the same position in the radial direction from the center of the combined body 40. The cross-sectional shape of the metal groove 32 is, for example, an inverted trapezoidal shape.

(Groove processing step: step S118)
In the groove portion machining step, the bottom portions 32a (FIG. 9) of the plurality of metal groove portions 32 of the second metal body 30 are respectively cut to expose the outer peripheral surface 10a of the first main body 10. For example, the bottom part 32a which is a thin part is cut using a machine tool or a metal file.

  FIG. 10 is a schematic diagram showing the bonded body 40 after the metal groove 32 is processed. By cutting the bottom portions 32a (FIG. 9) of the plurality of metal groove portions 32 as described above, the portions corresponding to the metal groove portions 32 on the outer peripheral surface 10a of the first main body 10 are exposed as shown in FIG. . In addition to the bottom 32a, the side wall 32b (FIG. 9) of the metal groove 32 may also be cut.

(Cutting process: Step S120)
In the cutting process, a peripheral surface of the second metal body 30 covering the first main body 10 is cut using a lathe (a lathe 70 shown in FIG. 11), and the outer peripheral surface 10a and the inner peripheral surface of the first main body 10 are cut. 10b is exposed. Specifically, in a state where the plurality of metal groove portions 32 of the second metal body 30 are supported by a chuck member of a lathe and the coupling body 40 is positioned, the second metal body is rotated by a cutting tool (bite) while the coupling body 40 is rotated. 30 peripheral surfaces are cut.

As described above, when the secondary casting is performed after the wax is applied to the first body 10, the peripheral surface of the second metal body 30 that is secondarily cast tends to be uneven due to the application state of the wax. Further, since the first main body 10 is covered with the second metal body 30, it is difficult to cut the second metal body 30 so that the outer peripheral surface 10a and the inner peripheral surface 10b of the first main body 10 are uniformly exposed. It is.
On the other hand, by supporting the plurality of metal groove portions 32 on the chuck member (chuck member 72 shown in FIG. 11) as in the present embodiment, the central axis of the cylindrical coupling body 40 and the rotation central axis of the lathe The combination 40 can be positioned to be the same. Thereby, the surrounding surface of the coupling body 40 can be cut with high precision by the blade of the lathe.

  In addition, by cutting the bottom part of the metal groove part 32 by step S118, the metal groove part 32 by which the bottom part 32a was cut is supported by a chuck member so that the outer peripheral surface 10a of the 1st main body 10 may be exposed. Thereby, for example, the chuck member positions the coupling body 40 so as to contact the outer peripheral surface 10a of the first main body 10 exposed from the metal groove portion 32, so that the central axis of the coupling body 40 is the same as the rotation central axis of the lathe. Thus, the combined body 40 can be supported.

  In the cutting process, the inner peripheral surface and the outer peripheral surface of the second metal body 30 covering the entire first main body 10 are cut. Here, following the first cutting step of cutting the inner peripheral surface of the second metal body 30, a second cutting step of cutting the outer peripheral surface of the second metal body 30 is performed.

  FIG. 11 is a schematic diagram for explaining the first cutting step. In the first cutting step, as shown in FIG. 11, the lathe 70 rotates the combined body 40 while the combined body 40 is positioned while the three metal groove portions 32 are respectively supported by the three chuck members 72, and the cutting tool is rotated. 75, the inner peripheral surface 30b of the second metal body 30 is cut. Specifically, the inner peripheral surface 30b of the second metal body 30 is cut so that the inner peripheral surface 10b of the first main body 10 covered with the second metal body 30 is exposed. The contact portions 72a of the three chuck members 72 come into contact with the metal groove portion 32 to position the combined body 40, so that the axis of the cylindrical combined body 40 and the rotation center axis of the lathe 70 are located on the same line. As a result, the inner peripheral surface 30b of the second metal body 30 can be cut with high accuracy. As a result, the inner peripheral surface 10b of the first main body 10 excellent in design is exposed.

  FIG. 12 is a schematic diagram for explaining the second cutting step. In the second cutting step, after the first cutting step, the exposed inner peripheral surface 10b of the first main body 10 is supported by the three chuck members 72 and the combined body 40 is positioned, so that the metal groove portion of the second metal body 30 is positioned. The outer peripheral surface 30a including 32 is cut. Specifically, the outer peripheral surface 30a of the second metal body 30 is cut so that the outer peripheral surface 10a of the first main body 10 covered with the second metal body 30 is exposed. The contact portions 72a of the three chuck members 72 contact the inner peripheral surface 10b exposed by the first cutting process to position the combined body 40, so that the axis of the combined body 40 and the rotation center axis of the lathe 70 are the same. The outer peripheral surface 30a including the metal groove portion 32 of the second metal body 30 can be cut with high accuracy.

  By cutting the inner peripheral surface 30b and the outer peripheral surface 30a of the second metal body 30 as described above, the second main body 20 fills the cavity 12 and the through hole 14 of the first main body 10, and the first main body 10 The metal ornament 1 is formed in which the peripheral surface and the peripheral surface of the second main body 20 are exposed as a uniform surface.

  In the above description, the metal groove 32 is formed on the outer peripheral surface 30a of the second metal body 30, but the present invention is not limited to this. For example, the metal groove part 32 may be formed in the inner peripheral surface 30b of the second metal body. In this case, in the first cutting step, the outer peripheral surface 30 a of the second metal body 30 is cut in a state where the chuck member 72 supports the metal groove portion 32 to expose the outer peripheral surface 10 a of the first main body 10. In the second cutting step, the inner peripheral surface 30b of the second metal body 30 is cut to expose the inner peripheral surface 10b of the first main body 10 with the chuck member 72 supporting the outer peripheral surface 10a.

<Effect in this embodiment>
In the manufacturing method of the metal ornament 1 (ring) described above, the wax application unit 150 that covers the first main body 10 made of platinum and includes a plurality of wax groove portions 152 arranged on the peripheral surface at predetermined intervals is formed. In the secondary casting, the second metal body 30 including the plurality of metal groove portions 32 corresponding to the plurality of wax groove portions 152 by pouring the second metal (here, gold) into the mold from which the wax application portion 150 has been removed. A joined body 40 is formed by joining the first body 10 to the first body 10. Further, the peripheral surface of the second metal body 30 is cut by the blade 75 while the combined body 40 is rotated while the combined body 40 is positioned with the plurality of metal groove portions 32 supported by the chuck member 72 of the lathe 70.

  According to the manufacturing method described above, the second metal body 30 covers the first body 10 by positioning the combined body 40 by supporting the plurality of metal groove portions 32 on the chuck member 72 of the lathe 70. Is located on the same line as the rotation center axis of the lathe 70. Thereby, the 2nd metal body 30 can be cut with the blade 75 so that the surrounding surface of the 1st main body 10 may be exposed uniformly. As a result, since the second metal body 30 can be cut with high accuracy, it is easy to realize a highly designable ring in which the first main body 10 and the second main body 20 are coupled as shown in FIG.

  In the above description, the first main body 10 is made of platinum and the second main body 20 is made of gold. However, the present invention is not limited to this. For example, the first main body 10 may be made of gold, and the second main body 20 may be made of platinum. In this case, after casting the 2nd main body 20 using platinum, the 1st main body 10 couple | bonded with the 2nd main body 20 will be shape | molded using gold | metal | money.

  Moreover, in the above, although the geometric pattern was formed because the through-holes 14 were scattered in the metal ornament 1, the present invention is not limited to this. For example, instead of the geometric pattern, a pattern or a character may be formed by the through hole 14.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment, A various deformation | transformation and change are possible within the range of the summary. is there. For example, the specific embodiments of device distribution / integration are not limited to the above-described embodiments, and all or a part of them may be configured to be functionally or physically distributed / integrated in arbitrary units. Can do. In addition, new embodiments generated by any combination of a plurality of embodiments are also included in the embodiments of the present invention. The effect of the new embodiment produced by the combination has the effect of the original embodiment.

DESCRIPTION OF SYMBOLS 1 Metal ornament 10 1st main body 12 Cavity 13 Outer surface part 14 Through-hole 20 2nd main body 22 Cavity filling part 24 Hole filling part 30 2nd metal body 32 Metal groove part 40 Combined body 70 Lathe 72 Chuck member 75 Cutting tool 110 1st prototype 120 Second prototype 150 Wax application part 152 Wax groove part

Claims (4)

A first metal body obtaining step of obtaining a cylindrical first metal body having a cavity and a hole by casting using the first metal;
A wax application part in which wax is applied so as to fill the hollow part and the hole part and cover the first metal body, and includes a plurality of wax groove parts formed on the peripheral surface at predetermined intervals in the circumferential direction An application part forming step for forming the application part;
A mold forming step of forming a mold from which the wax application part has been removed from a gypsum mold formed using the first metal body covered with the wax application part;
A combined body in which a second metal having a melting point lower than that of the first metal is poured into the mold and a second metal body including a plurality of metal groove portions corresponding to the plurality of wax groove portions is bonded to the first metal body. A combined body molding step for molding;
With the plurality of metal grooves supported by a lathe chuck and positioning the combined body, the lathe cuts the peripheral surface of the second metal body with a blade while rotating the combined body, A cutting process for exposing the peripheral surface of the metal body;
A method for manufacturing a metal ornament. In the application part forming step, the wax groove part is formed along the axial direction of the first metal body on the outer peripheral surface of the wax application part.
The manufacturing method of the metal ornament of Claim 1. The cutting process includes
In a state where the metal groove portion formed on the outer peripheral surface of the second metal body is supported by the chuck and the combined body is positioned, the lathe rotates the combined body while the lathe rotates the combined body, and the cutter cuts the second metal body. A first cutting step of cutting an inner peripheral surface to expose the inner peripheral surface of the first metal body;
After the first cutting step, the outer peripheral surface including the metal groove portion of the second metal body is cut in a state where the inner peripheral surface of the first metal body is supported by the chuck and the combined body is positioned. A second cutting step of exposing an outer peripheral surface of the first metal body,
The manufacturing method of the metal ornament of Claim 1 or 2. Further comprising a groove processing step of cutting a bottom portion of the metal groove portion of the second metal body formed in the combined body forming step to expose an outer peripheral surface of the first metal body;
In the cutting step, the metal groove portion whose bottom portion is cut by the groove portion machining step is supported by the chuck and the combined body is positioned.
The manufacturing method of the metal ornament of any one of Claim 1 to 3.