JP6747775B2 - Ornaments and rings - Google Patents

Description

The present invention relates to a decorative tool and a ring.

Silver has been used in electric circuits because of its excellent electrical resistance, contact resistance, high-frequency characteristics, and sliding characteristics, but it has also been used for decorative tools and the like because of its high reflectivity or high glossiness. (See Patent Document 1, etc.). Examples of ornamental tools include jewelry such as rings, broaches, necklaces, chains, and tableware. As a metal material used for a decorative tool or the like, a metal alloy in which a plurality of metal materials are mixed rather than simple silver is generally used in consideration of sulfidation resistance, corrosion resistance, and the like. On the other hand, it is known to color silver in a decorative tool in order to improve the taste.

JP, 2005-307328, A

One of the challenges in the development of decorative tools is to make the color due to the metal alloy material bright.

Then, this invention aims at providing the accessory and ring which can improve a palatability.

A decorative tool according to an embodiment of the present invention is a decorative tool that is composed of a metal alloy containing silver as a main component and also containing copper, which is obtained by melting, cooling and solidifying a metal material , wherein copper on the surface is Is larger than the content of copper in the interior. Further, the content of copper on the surface is less than 50% by mass.

A ring according to an embodiment of the present invention is a ring that contains a metal alloy containing silver as a main component and also containing copper, and in a plan view, the content of copper on the first surface on the outer peripheral side is the inner peripheral side. Content of copper on the second surface of

According to the embodiments of the present invention, it is possible to provide a decoration tool and a ring that can improve the preference.

It is the figure which looked at the ornamental tool (ring) concerning one embodiment of the present invention from the slanting direction. It is sectional drawing which shows the cross section when it cut|disconnects in the decoration tool of FIG. 1 by the AA line. FIG. 2 is a cross-sectional view showing a decorative tool (ring) according to a modified example of the embodiment of the present invention, in which (a) shows a plane and (b) shows a cross section taken along line BB of (a). is there.

Hereinafter, a decorative tool according to an embodiment of the present invention will be described with reference to the drawings. In addition,
The drawings used in the following description are schematic, and the dimensional ratios and the like on the drawings do not always match the actual ones.

The metal alloy used for the accessory according to the embodiment of the present invention will be described below. The accessory according to this embodiment is made of a metal alloy containing silver containing copper as a main component. In the present embodiment, the ring 1 will be described as an example of the accessory.

The ring 1 has a substantially annular shape as shown in FIG. The ring 1 is not limited to a ring shape, and may be any shape that does not easily fall off the user's finger. The ring 1 can be appropriately applied with a shape capable of improving the preference. Therefore, the ring 1 may have a shape that is not a perfect ring as long as it is difficult to fall off the finger to some extent.

The inner diameter nh of the ring 1 is set to, for example, 1 cm or more and 3 cm or less. The outer diameter gh of the ring 1 is set to be several mm larger than the inner diameter nh. That is, the thickness of the ring 1 may be set appropriately, but is set to be, for example, 1 mm or more and 5 mm or less. Inner diameter nh and outer diameters gh ring 1 may be appropriately set to match the user's fingers.

The ring 1 may be provided with a pedestal for fixing jewelry such as diamond, sapphire, ruby, and emerald. Furthermore, in order to improve decorativeness, the surface of the ring 1 may be scraped or the surface of the ring 1 may be modified. The work performed on the surface of the ring 1 may be the same metal alloy as the ring 1 or may be a different material.

The metal alloy forming the ring 1 is configured such that silver is a main component. That is, in the metal alloy, it suffices that the content of silver is larger than that of the other metal inclusions contained in the metal alloy. For example, when silver is contained in the metal alloy in an amount of 50 mass% or more, it can be said that silver is the main component regardless of the mass% of other metal-containing substances. In the present embodiment, the upper limit of the silver content may be, for example, 98% by mass or less because of the inclusion of other metal-containing substances.

The metal alloy forming the ring 1 contains copper for producing a reddish color. Specifically, in the metal alloy, copper is set to, for example, 35% by mass or more and less than 50% by mass. The ring 1 increases redness as the copper content increases, and decreases as the copper content decreases. As a result, the ring 1 looks like pink. The metal alloy is set such that a+b is less than 100% by mass, where the content of silver is a and the content of copper is b.

The metal alloy may contain a metal material of at least one of palladium, gold, indium, and germanium. The metal alloy forming the ring of the present embodiment contains all of palladium, gold, indium and germanium. That is, the total content of silver, copper, palladium, gold, indium and germanium is set to be approximately 100% by mass . The metal alloy may contain an unavoidable material.

Specifically, palladium is contained in the metal alloy so as to be, for example, 2% by mass or more and 5% by mass or less. The inclusion of palladium in the metal alloy makes it difficult to oxidize. Generally, copper is a material that is easily oxidized, but the inclusion of palladium in the metal alloy makes it difficult for the metal alloy to be oxidized.

Germanium, indium, or gold is contained in the metal alloy, for example, 2 mass% or less. Germanium can make the metal alloy less susceptible to sulfidation. Since indium can improve the flow of molten metal alloy, castability can be improved. Further, by containing gold, the color rendering property can be improved.

The metal alloy is set such that the content ratio as a bulk is, for example, silver:copper:germanium:palladium:gold:indium=47:46.5:0.5:4:1:1 as a design value. It Note that unintentional and unavoidable impurities may be mixed. Unintended unavoidable impurities include, for example, zinc, tin and magnesium.

Rings 1 used in this embodiment, the content of copper in the surface 1a has become larger than the amount of copper contained in the inner portion 1b. That is, the ring 1 is segregated so that the amount of copper increases on the surface 1a side. The surface 1a is a region having a depth of 10 μm or less from the outermost surface of the ring 1. The inside 1b refers to the inside of the ring 1. Specifically, the interior 1b refers to a region located at a portion that has advanced from the surface 1a in the depth direction. The position of the interior 1b is set arbitrarily, but is set in a region where the depth from the surface 1a is, for example, 10 μm or more. The maximum value of the depth of the position of the inside 1b is set to, for example, about 1/5 of the size of the ring 1.

The content of copper on the surface 1a may be higher than the content of copper on the interior 1b, but can be set to, for example, 1% by mass or more and 7% by mass or less. The content of germanium in the interior 1b may be less than the content of germanium in the surface 1a, but can be set to, for example, 0.5% by mass or more and 4.3% by mass or less.

The ring 1 can confirm the segregation of copper using, for example, a fluorescent X-ray analyzer (XRF). The copper content in the surface 1a can be confirmed by analyzing the outermost surface of the ring 1 or the surface polished by 10 μm or less from the outermost surface by XRF. The copper content in the inside 1b can be confirmed by analyzing the surface of the ring 1 polished by 10 μm or more from the outermost surface by XRF.

In the ring 1 of this embodiment, the content of copper in the surface 1a is larger than the content of copper in the inside 1b. Since the ornamental tool and the ring 1 of the present embodiment are made of a silver alloy, silver needs to be the main component, and the content of copper for coloring the alloy is limited. Therefore, a bright color can be realized by segregating copper on the surface 1a like the ring 1 of the present embodiment. Further, since the content of silver existing on the surface 1a is reduced, it is possible to reduce deterioration of the color of the ring 1 due to sulfuration of silver. As a result, the palatability of the accessory and the ring can be further improved.

Further, although the ring 1 of the present embodiment contains germanium, the segregation of copper on the surface 1a may make it difficult for germanium to exist near the surface 1a. Since germanium usually affects the direction in which the color becomes lighter, as in the case of the ring 1 of the present embodiment, it becomes difficult for germanium to exist in the vicinity of the surface 1a, so that a brighter color can be realized. In addition, the segregation of copper in the vicinity of the surface 1a makes it difficult for silver to exist in the vicinity of the surface 1a.

The ring 1 can be manufactured by, for example, a casting method using a modeling wax mold. The mold is made using modeling wax. Since the modeling wax can be formed into any shape, it is processed into the shape of the ring 1. Next, the modeling wax and the wax that serves as a passage for pouring the metal alloy are covered with gypsum, and then the wax is removed to form a mold.

Silver as a metal alloy, copper, palladium, gold, melting the melt weighed metal material as indium and germanium becomes a predetermined mass ratio poured into a mold, solidifying the melt by cooling. Thereafter, the plaster is destroyed to cut out the portion that will become the ring 1. Then, after that, the surface of the portion to be the ring 1 is pickled with an acid such as nitric acid or hydrochloric acid, whereby the ring 1 can be manufactured.

The metallic material as a method of melting can be used, for example high frequency heating or the like. The temperature for melting silver, copper, palladium, gold, all indium and germanium may be set to a temperature that melting. For example, it can be set to 950° C. or higher and 1400° C. Silver, palladium, gold, a metal material such as indium and germanium when molten, in order to reduce that these metal materials are bonded to oxygen, may become rows oxygen-poor environment. As an environment with a small amount of oxygen, for example, a vacuum pump is used to create a reduced pressure environment of 1.0 Pa to 1.5 Pa, and the degree of reduced pressure is 4.5×10 ⁴ Pa to 5.5× by introducing Ar gas. An environment adjusted to 10 ⁴ Pa can be used.

As a method of cooling the mold, the melt may be gradually cooled, or may be rapidly cooled after being formed into a desired shape. Cooling to but it may also be a natural cooling, it may be subjected to forced cooling. In the case of natural cooling, cracks can be made less likely to occur, and in the case of forced cooling, oxidation can be made less likely.

(Modification 1 of the ring)
The ring 1 may be configured such that copper is gradually present in a large amount from the inside 1b to the surface 1a . In addition, at least one of germanium, palladium, and silver may be gradually decreased from the surface 1a to the inside 1b. Here, the state in which the copper is present more gradually toward the surface 1a from the inside 1b, if the weight% of the copper is present in stages much toward the surface 1a from the inside 1b, or is intended to include for example, to gradually increase .. Note that such a state may be confirmed by a method in which the measured data is approximated by the least square method or a linear approximation.

Since the copper is set to be present in a large amount from the inside 1b to the surface 1a in this way, it is possible to make it difficult for the inside of the metal alloy to have a surface that easily breaks. As a result, the strength of the ring 1 can be increased. The same applies when at least one of germanium, palladium, and silver gradually decreases from the surface 1a to the inside 1b.

(Modification 2 of the ring)
As shown in FIG. 3, in the ring 1, the copper content in the first surface 1 A a on the outer circumference 1A side is different from the copper content in the second surface 1Ba on the inner circumference 1B side in plan view. It is arranged. That is, the color can be changed by making the copper content in the second surface 1 Ba on the inner circumference 1B side into which the user's finger enters differs from the copper content in the first surface 1 A a on the outer circumference 1A side. Therefore, the palatability can be further improved. Note that varying the copper content of the first surface 1 A a and the second surface 1 Ba, if better than the first surface 1 A a second surface 1 Ba for copper content is small, the copper content The case where the number of the second surface 1 Ba is larger than that of the first surface 1 A a in the above is included.

Further, the content of the first surface 1Aa on the outer circumference 1A side may be larger than the content of copper on the second surface 1Ba of the inner circumference 1B. The copper content in the first surface 1Aa is, for example, 3 mass % or more and 50 mass % or less than the copper content in the second surface 1Ba. Since the content of copper on the outer periphery 1A side of the ring 1 is large in this way, it is possible to improve the outward appearance. Together with it, since the copper content is reduced in the second surface 1Ba of the inner peripheral 1B side where the user's fingers entering, the copper by sweat of the user's finger can be reduced that you degradation You can

1 ring 1a surface 1b inner nh inner diameter gh outer diameter 1A outer circumference 1Aa first surface 1B inner circumference 1Ba second surface

Claims (7)

A decoration tool comprising silver as a main component and containing copper, which is composed of a metal alloy obtained by melting, cooling and solidifying a metal material ,
The content of copper on the surface is higher than the content of copper on the inside,
A decorative tool having a copper content of less than 50% by mass on the surface. A decoration tool comprising silver as a main component and containing copper, which is composed of a metal alloy obtained by melting, cooling and solidifying a metal material ,
The content of copper on the surface is higher than the content of copper on the inside,
The metal alloy is a decorative tool having a silver content a of 55% by mass or less and a copper content b of 30% by mass or more and less than 50% by mass. A decoration tool comprising silver as a main component and containing copper, which is composed of a metal alloy obtained by melting, cooling and solidifying a metal material ,
The content of copper on the surface is higher than the content of copper on the inside,
The accessory according to claim 1, wherein the content of silver increases from the surface toward the inside. The decoration tool according to claim 1, wherein the surface is a region having a depth of 10 μm or less from the outermost surface. A decoration tool comprising silver as a main component and containing copper, which is composed of a metal alloy obtained by melting, cooling and solidifying a metal material ,
The content of copper on the surface is higher than the content of copper on the inside,
Further including germanium,
A decorative device in which the content of germanium in the surface is lower than the content of germanium in the interior. A decoration tool comprising silver as a main component and containing copper, which is composed of a metal alloy obtained by melting, cooling and solidifying a metal material ,
The content of copper on the surface is higher than the content of copper on the inside,
Further containing palladium,
A decoration tool in which the content of palladium on the surface is higher than the content of palladium on the inside. A ring made of a metal alloy containing silver as a main component and containing copper, which is obtained by melting, cooling and solidifying a metal material ,
A ring in which the content of copper on the first surface on the outer peripheral side is larger than the content of copper on the second surface on the inner peripheral side in a plan view.

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