JP2010089435A - Working method for noble metal decorative implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily form a groove on a surface of a noble metal decorative implement. <P>SOLUTION: This method for the noble metal decorative implement includes: a multilayered metal body forming process for forming a multilayered metal body 14 laminated with a plurality of metal layers 12, by laminating a plurality of metal sheets 11 different in materials and by joining the plurality of metal sheets 11; and a groove forming process for removing partially at least one of the metal layer 12 out of the plurality of metal layers 12, based on the difference of the material in the plurality of metal layers 12, and for forming the groove on a main surface of the multilayered metal body 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for processing a noble metal ornament.

Conventionally, among precious metal jewelry such as rings and pendants, a method of forming a groove or an opening on the surface of the jewelry by removing a part of the surface by etching is known. For example, see Patent Document 1).
JP-A-8-164007

  However, in the conventional method, a photoresist is laminated on the surface of the jewelry, exposed and developed to selectively remove the photoresist in accordance with the groove pattern, and the surface of the jewelry is etched using the photoresist as a mask. It was. For this reason, there are problems that the manufacturing process is complicated, the number of processes is large, and the manufacturing cost is high.

  This invention is made | formed in view of such a subject, The objective is to provide the technique which can form a groove part more easily in the surface of a noble metal ornament.

  One embodiment of the present invention is a method for processing a noble metal ornament. The processing method of the noble metal ornament is formed by stacking a plurality of metal plates of different materials and joining a plurality of metal plates to form a multilayer metal body in which a plurality of metal layers are stacked. A step of forming a groove on the main surface of the multilayer metal body by partially removing at least one metal layer of the plurality of metal layers based on the difference in material between the step and the plurality of metal layers; , Including.

  According to this aspect, the groove portion can be easily formed on the surface of the noble metal ornament.

  In the above aspect, the twisting step of twisting the multilayer metal body formed in the multilayer metal body forming step with a predetermined direction orthogonal to the stacking direction of the metal plates as an axis, and the multilayer metal body having a predetermined thickness Extending in the groove portion forming step, and in the groove portion forming step, the groove portion may be formed in the region where the laminated pattern of the plurality of metal layers is formed on the main surface of the multilayer metal body. .

  Further, in the above aspect, the spreading step of spreading the multilayer metal body to a predetermined thickness by pressing the multilayer metal body formed in the multilayer metal body forming step in the stacking direction of the plurality of metal layers. And a recess forming step of forming a recess deeper than the thickness of one layer of the metal layer on the main surface of the multilayer metal body, and in the groove forming step, of the main surface of the multilayer metal body, You may make it form a groove part in an inner surface.

  A combination of the above-described elements as appropriate can also be included in the scope of the invention for which patent protection is sought by this patent application.

  According to the present invention, a groove can be more easily formed on the surface of a noble metal ornament.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same constituent elements are denoted by the same reference numerals, and detailed description thereof will be appropriately omitted in the following description.

(Embodiment 1)
1 (A) to 1 (C) and FIGS. 2 (A) and 2 (B) are process explanatory views showing a processing method for a noble metal ornament according to Embodiment 1. FIG. In each figure, (i) is a schematic side view, and (ii) is a schematic plan view.

  First, as shown to FIG. 1 (A), the several metal plate 11 (11a-11f) from which a material differs is laminated | stacked. As a material of the metal plate 11, platinum (Pt), gold (Au), silver (Ag), copper (Cu), brass (brass), titanium (Ti), iron (Fe), nickel (Ni), stainless steel, Tantalum (Ta) or a mixture thereof is used. The plurality of metal plates 11 are made of at least two kinds of different materials, and the combination of the metal plates 11 to be laminated is determined according to the type of etching solution used in the groove forming step described later. In the present embodiment, metal plates 11a and 11d made of Pt, metal plates 11b and 11e made of Ag, and metal plates 11c and 11f made of Au are laminated. The thickness of the metal plate 11 is, for example, about 0.3 to 1.0 mm.

Next, as shown in FIG. 1B, a plurality of stacked metal plates 11 are joined together to form a multilayer metal body 14 in which a plurality of metal layers 12 are stacked. The metal layers 12 (12a to 12f) are formed by the metal plates 11 (11a to 11f). The joining between the metal plates 11 is performed by, for example, bringing the metal plates 11 into close contact with each other and pressurizing the metal plates 11 to the extent that plastic deformation of the metal plates 11 does not occur as much as possible under a temperature condition below the melting point of the metal plates 11. The diffusion bonding is performed by using the diffusion of atoms generated therebetween. The conditions for performing diffusion bonding are as follows, for example. That is, it is performed by heating and pressurizing to 500 to 1200 ° C. and 200 to 500 kgf / cm ² . The metal plates 11 may be joined by brazing.

  Next, as shown in FIG. 1C, the multilayer metal body 14 is twisted by a predetermined amount with a predetermined direction orthogonal to the stacking direction of the metal layers 12 as an axis. As a result, a laminated pattern composed of a plurality of metal layers 12, a so-called wood grain pattern, is formed on the upper surface of the multilayer metal body 14.

  Next, as shown in FIG. 2A, the multilayer metal body 14 is spread to a predetermined thickness. Specifically, for example, the multilayer metal body 14 is spread by inserting the multilayer metal body 14 between two rollers that are rotatably installed at a predetermined interval and pressing the surface. Thereby, the multilayer metal body 14 is extended to about 0.5-2.0 mm, for example. Here, since the multilayer metal body 14 is twisted by a predetermined amount, a multilayer pattern of the metal layer 12 is formed on the main surface of the multilayer metal body 14.

  Next, as shown in FIG. 2 (B), at least one type of metal layer among the plurality of metal layers 12 is partially removed based on the difference in material between the plurality of metal layers 12, and a multilayer metal body is obtained. A groove 16 is formed on the main surface 14. Specifically, concentrated nitric acid having a predetermined concentration is used as an etching solution, and the metal layers 12b and 12e made of Ag are partially removed by immersing the multilayer metal body 14 in the etching solution for a predetermined time, thereby forming the groove portion 16. Is forming.

  The multilayer metal body 14 includes metal layers 12a and 12d made of Pt, metal layers 12b and 12e made of Ag, and metal layers 12c and 12f made of Au. When concentrated nitric acid is used as the etching solution, only Ag is dissolved by the concentrated nitric acid, and Pt and Au do not react. Therefore, only the metal layers 12b and 12e made of Ag are partially removed, and the groove 16 is formed. Therefore, it is not necessary to cover and mask the photoresist in the region where the groove 16 is not formed. In the present embodiment, the metal layer 12b, 12e is partially removed to form the groove 16 in the region where the laminated pattern of the plurality of metal layers 12 is formed on the main surface of the multilayer metal body 14. ing. Although illustration is omitted, the formation of the groove 16 by etching is performed after the multilayer metal body 14 is processed into the shape of the final ornament.

  As described above, the groove 16 is formed on the surface of the accessory. The decorative device that has been subjected to the above-described processing has a shape in which at least one metal layer 12 is partially removed from the plurality of metal layers 12 made of different materials to form a groove 16.

  The effects of the method for processing a noble metal ornament according to Embodiment 1 described above are as follows. That is, in the first embodiment, at least one type of metal layer 12 is partially removed from the plurality of metal layers 12 based on the difference in material between the plurality of metal layers 12, and the main surface of the multilayer metal body 14 is removed. A groove portion 16 is formed. Therefore, since it is not necessary to use a photoresist as a mask, the groove can be easily formed on the surface of the noble metal ornament. In addition, since the manufacturing process can be simplified, the manufacturing cost can be reduced.

  Moreover, since the surface of the decorative tool has a more three-dimensional shape by forming the groove portion 16, high aesthetics can be obtained. In particular, according to the processing method of Embodiment 1, since the groove part 16 can be formed along a wood grain pattern, more original and high aesthetics can be obtained. Furthermore, by forming the groove portion 16 along the wood grain pattern, it is possible to maintain a state in which the wood grain pattern can be clearly recognized even when the surface of the accessory has many fine scratches due to use or the like.

(Embodiment 2)
Embodiment 2 demonstrates the method of forming a recessed part in the main surface of the multilayer metal body 14, and forming the groove part 16 in the inner surface of a recessed part. In addition, the same code | symbol is attached | subjected about the structure same as Embodiment 1, and the description is abbreviate | omitted suitably.

  3 (A) to 3 (C) and FIGS. 4 (A) and 4 (B) are process cross-sectional views illustrating a method for processing a noble metal ornament according to the second embodiment. In each figure, (i) is a side view and (ii) is a plan view.

  First, as shown to FIG. 3 (A), the several metal plate 11 (11a-11f) from which a material differs is laminated | stacked. The plurality of metal plates 11 are made of different materials, and the combination of the metal plates 11 to be laminated is determined according to the type of etching solution used in the groove forming step described later. In the present embodiment, similarly to the first embodiment, the metal plates 11a and 11d made of Pt, the metal plates 11b and 11e made of Ag, and the metal plates 11c and 11f made of Au are laminated.

Next, as shown in FIG. 3B, a plurality of stacked metal plates 11 are joined together to form a multilayer metal body 14 in which a plurality of metal layers 12 are stacked.
Next, as shown in FIG. 3C, the multilayer metal body 14 is pressed in the stacking direction of the plurality of metal layers 12 to spread the multilayer metal body 14 to a predetermined thickness.

  Next, as shown in FIG. 4A, a recess 18 deeper than the thickness of one layer of the metal layer 12 is formed on the main surface of the multilayer metal body 14. The concave portion 18 is formed by removing the metal in the concave portion formation region by, for example, laser irradiation or engraving. The metal layers 12c to 12f are exposed on the inner surface of the recess 18.

Next, as shown in FIG. 4B, based on the difference in material in the plurality of metal layers 12, at least one kind of metal layer is partially removed from the plurality of metal layers 12, and a multilayer metal body is obtained. The groove portion 16 is formed on the inner surface of the recess 18 in the main surface of 14. Specifically, the multilayer metal body 14 is immersed in concentrated nitric acid for a predetermined time, whereby the metal layers 12b and 12e made of Ag are partially removed to form the groove 16. Although illustration is omitted, the formation of the groove 16 by etching is performed after the multilayer metal body 14 is processed into the shape of the final accessory.
As described above, the groove 16 is formed on the surface of the accessory.

  According to the method for processing a noble metal ornament according to the second embodiment described above, the same effects as in the first embodiment can be obtained. Moreover, the ornament with the aesthetics different from the case of the processing method which concerns on Embodiment 1 can be formed.

  The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added based on the knowledge of those skilled in the art. The form can also be included in the scope of the present invention.

  For example, the groove 16 may be formed on the surface of the accessory as follows without performing the twisting process and the formation of the recess 18 as described above. That is, after a plurality of metal plates 11 of different materials are stacked and joined to form a multilayer metal body 14, the multilayer metal body 14 is pressed to a predetermined thickness by pressing in a direction perpendicular to the stacking direction of the metal layers 12. Extend until. Then, on one main surface of the multilayer metal body 14, at least one type of metal layer 12 is partially removed from the plurality of metal layers 12 based on the difference in material between the plurality of metal layers 12, and the main surface The groove portion 16 may be formed in the groove.

  In each of the above-described embodiments, the groove 16 is formed by etching. However, the groove 16 may be formed by electrolysis, for example. That is, the combination of the metal plates 11 to be laminated to form the multilayer metal body 14 is determined according to the degree of ionization tendency, and electrolysis is performed using the multilayer metal body 14 as an anode. Specifically, for example, a multilayer metal body 14 is formed using a metal layer 12 made of Pt and a metal layer 12 made of Au, and the multilayer metal body 14 after being processed into the shape of a decoration is used as an anode. Disassemble. And the groove part 16 may be formed by partially removing the metal layer 12 made of Pt using the difference in ionization tendency between Pt and Au.

  In addition to the precious metal accessories such as rings, pendants, necklaces, earrings, cuffs, brooches, tie tacks, bangles, buckles, chokers, bracelets, etc. It can be applied to spoons, precious metal jewelry boxes, precious metal vases and basins, compacts, watches, smoking equipment, etc.

  In each drawing, the number of metal plates 11 and the number of metal layers 12 are six, but the present invention is not particularly limited to this. The thickness of the metal plate 11 and the metal layer 12, the number of stacked layers, the thickness after the multilayer metal body 14 is spread, and the like can be appropriately changed according to the finally processed accessory.

1A to 1C are process explanatory diagrams illustrating a processing method for a noble metal ornament according to Embodiment 1. FIG. 2A and 2B are process explanatory views showing a method for processing a noble metal ornament according to Embodiment 1. FIG. 3A to 3C are process explanatory diagrams illustrating a processing method for a noble metal ornament according to the second embodiment. 4A and 4B are process explanatory views showing a processing method for a noble metal ornament according to Embodiment 2. FIG.

Explanation of symbols

  11, 11a-11f metal plate, 12, 12a-12f metal layer, 14 multilayer metal body, 16 groove part, 18 recessed part.

Claims (3)

A multilayer metal body forming step of laminating a plurality of metal plates of different materials and joining the plurality of metal plates to form a multilayer metal body in which a plurality of metal layers are laminated;
A groove portion forming step of partially removing at least one metal layer of the plurality of metal layers based on a difference in material between the plurality of metal layers, and forming a groove portion on a main surface of the multilayer metal body; ,
The processing method of the noble metal ornament characterized by including this. Twisting the multilayer metal body formed in the multilayer metal body forming step about a predetermined direction orthogonal to the stacking direction of the metal plates;
A spreading step of spreading the multilayer metal body to a predetermined thickness, and
2. The noble metal ornament according to claim 1, wherein in the groove portion forming step, a groove portion is formed in a region where a laminated pattern of the plurality of metal layers is formed on a main surface of the multilayer metal body. Processing method. A spreading step of spreading the multilayer metal body to a predetermined thickness by pressing the multilayer metal body formed in the multilayer metal body forming step in a stacking direction of the plurality of metal layers;
A recess forming step of forming a recess deeper than the thickness of one layer of the metal layer on the main surface of the multilayer metal body,
2. The method for processing a noble metal accessory according to claim 1, wherein, in the groove forming step, a groove is formed on an inner surface of the concave portion of the main surface of the multilayer metal body.

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