WO2014167486A2

WO2014167486A2 - Decorative item

Info

Publication number: WO2014167486A2
Application number: PCT/IB2014/060513
Authority: WO
Inventors: 黄桂腾; 陈柏年; 何冠寰
Original assignee: 周大福珠宝金行有限公司
Priority date: 2013-04-08
Filing date: 2014-04-08
Publication date: 2014-10-16
Also published as: TW201441426A; WO2014167486A3; CN104097445A; HK1189326A2

Abstract

A pure-gold decorative item having the characteristics of a traditionally refined and beautiful pure-gold surface and also the high hardness and rigidity characteristics of non-pure gold. More specifically, the present invention uses an electroforming process to create a rigid shell made of pure gold in order to provide the required support to a soft, pure-gold outer layer. Because it is relatively simple to achieve a varied surface texture on the soft, pure gold by means of surface processing, the pure-gold decorative item of the present invention has the advantages of being refined, beautiful and intricately textured, befitting an art appreciation piece or a collectible.

Description

Decoration

Technical field

The invention relates to a garnish, in particular to a garnish having a gold surface. BACKGROUND OF THE INVENTION Gold is a precious metal with high value-keeping and high ornamental properties, and therefore gold-colored articles such as furnishings and other decorative objects are widely welcomed. Due to the high price of gold, many gold-made objects have only the outermost layer of gold and the inner core is an empty core or a non-gold metal filler to achieve the maximum surface area using the minimum amount of gold. Gold products are the most valuable in terms of gold products, so many gold products have the outer layer of gold. Since the gold is soft and easy to produce various surface textures on it, the outer layer of the gold product can have various exquisite and beautiful surface textures, for example, suede, sand surface, and velvet sand surface (ie, suede and sand) Combination of faces) or other surface textures. These surface textures are exquisite and beautiful due to the exquisite craftsmanship, and the gold products are popular among the public for their ornamental and value-keeping functions. The gold with suede, sand surface, or velvet sand surface (collectively referred to herein as velvet sand surface and velvet sand gold) is usually formed by electroforming. For those skilled in the art who are familiar with the production of gold articles, the gold content is 99. 9 with a gold content higher than or equal to 100 parts. Consumers also occasionally claim that gold is pure gold. However, the common gold has a low hardness and strength (its Vickers hardness is about 20-40Hv) and is easily deformed. This physical property limits the plasticity, shape, configuration, and volume of the gold products, especially the hollow full-length gold products, to a certain extent, so that the design of the existing gold products is somewhat simple or monotonous. At the same time, this property also limits the minimum thickness of the gold surface to a certain extent. Furthermore, the low hardness and poor strength of the velvet sand gold also affect the processing efficiency of the post-process in the electroforming process, directly resulting in a low yield. On the other hand, the use of non-full-gold metal fillers to support the outer layer of the gold to reduce the thickness of the gold surface and/or increase the volume may also cause oxidation due to the leakage of the non-full-gold metal filler. There is a quality problem on the surface. SUMMARY OF THE INVENTION One aspect of the present invention provides a full-featured gold fitting having the characteristics of a conventional gold-gold delicate and aesthetic surface and having a high hardness and rigidity characteristic of non-foot gold. In particular, the present invention provides the support required for a soft full-featured gold outer skin by a full-foot gold hard shell created by an electroforming process. Since the soft gold can be easily processed by surface treatment to have a variety of surface textures, the full-featured gold display of the present invention can have the advantages of exquisite appearance and strong texture, and is also an art appreciation or collection. More specifically, the present invention provides a display member comprising a hard gold shell and a soft foot gold surface covering the hard gold shell and having a surface texture, wherein the hard foot The hardness of the gold shell is higher than the hardness of the soft gold surface layer. The hardness of the hard gold shell is higher than 80 Hv, for example higher than 90 Hv, and may also be higher than 100 Hv, for example. The hardness of the hard gold shell is typically less than 180 Hv, for example less than 150 Hv. The soft gold surface layer has a hardness of less than 60 Hv, may be lower than 50 Hv, or may be lower than 40 Hv. The hardness of the hard gold shell may be higher or lower than the hardness of the soft gold surface layer, for example, or may be 60Hv or higher. The hardness and strength of the ornaments with the hard gold inner shell supporting the velvet sand gold outer shell are high, and the ornaments can be modified by traditional jewelry techniques such as car flower and sand. The rigid housing can be hollow as a support housing. The hollow hard shell saves the amount of gold in the same volume of the object. The hollow hard shell greatly enhances the plasticity of the shape of the object. The hard gold shell typically has a thickness of more than 60 microns, may be more than 80 microns, or may be more than 100 microns. The hard gold shell typically has a thickness of less than 350 microns, may be less than 300 microns, or may be less than 200 microns. The soft gold layer has a thickness of less than 80 microns to reduce the amount of gold used. The soft gold layer may have a thickness of less than 20 microns. Due to the high hardness and rigidity of the full-foot gold hard shell, it provides all the support needed for a soft full-featured gold outer skin. The full-featured gold fitting having the above characteristics is not easily deformed even without the support of the filler. These features make the hollow full-featured gold product have better plasticity, which reduces the problem of the shape, configuration and volume of the full-length gold product to a certain extent by reducing the problem of low hardness and low strength of common gold. . The gold fittings (also called the ornaments) of the embodiment of the invention have the advantages of thinner castings and less weight than the traditional gold ornaments, and the same ornaments consume less gold. In the embodiment of the invention, the soft gold surface layer is electroformed on the hard gold shell. The full-foot gold hard shell and the soft gold surface layer of the embodiment of the present invention are all caused by an electroforming process, and of course, may be caused by other known processes. Another aspect of the present invention provides a method of manufacturing a decorative member, characterized in that after forming a hard gold shell by electroforming, the hard gold shell is covered by electroforming to form a surface. a textured soft gold surface layer, wherein the hardness of the hard gold shell is higher than the hardness of the soft gold surface layer and the surface decorative texture is suede, sand surface, velvet sand surface, or other concave surface Texture. The manufacturing method may include first forming the hard gold shell having a hardness higher than 90 Hv by electroforming, and then electroforming to form a soft gold surface layer having a hardness of less than 40 Hv and covering the hard gold shell. The method may first form a hard gold shell by electroforming a wax mold covered with a conductive layer on a surface, and then electroforming the hard gold shell to form the surface texture. Soft gold surface. The conductive layer can be a non-gold metal layer. The method can include removing wax after forming the soft gold surface layer having a surface texture to form a hollow shell, the hollow shell having a hardness or stiffness sufficient to support the soft gold surface layer. The amount of gold (Au) is 99.9% or more. Further description of the various aspects of the invention, including the claims and the summary of the invention, is provided by the accompanying drawings, The drawings are only provided to assist in the description and description, and are not intended to limit the scope of the invention. Additionally, structural features shown or described in any embodiment herein may also be used in other embodiments. In addition, the terms "a", "an", and "the" BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a full-foot gold arrangement, FIG. 2 is a cross-sectional view of the arrangement of FIG. 1 along the line AA', and FIG. 3 is a wax pattern suitable for use in the fabrication of the arrangement of FIG. detailed description

The display member 100 shown in FIGS. 1 and 2 includes an inner casing 110. The inner casing 110 is hollow and its inner shape follows the outer shape of the wax mold shown in FIG. The inner casing is all hard gold with a thickness of between about 60 and 350 microns (μm). The outer casing 120 is a soft gold surface layer covering the inner casing 110. The outer casing 120 has a thickness of between about 20 and 80 microns (μm). Since the soft gold outer casing 120 is fully supported by the inner core 120 of the hard gold, the thickness of the soft gold layer of the outer casing 120 is greatly reduced compared to the thickness of the conventional gold fittings, achieving the same surface area. The amount of gold can be greatly saved without affecting the appearance of the gold surface layer of the display piece. The outer casing 120 is a soft gold outer shell layer having a surface texture. The surface texture has a relief depth typically greater than 0.05 microns. The soft gold outer casing 120 is a velvet gold formed by an electroforming process, and the hard gold inner casing 110 is a smooth casing formed by an electroforming process. The formation of the garnish 100 will now be described using an electroforming process as an embodiment. First, a wax pattern 130 that determines the shape, configuration, and volume of the finished product is made according to design requirements. Next, a surface of the wax or wax mold 130 is covered with a conductive layer 132. Conductive layer 132 can be silver or other metal. The conductive layer 132 is required to be uniform and smooth, and there should be no defects such as granules or leaks. After the conductive layer 132 is formed on the surface of the wax pattern 130, the wax pattern 130 is placed in a hard gold layer electroforming cell to form the hard gold inner casing 110. The main component of the hard gold electroforming cell in the hard gold electroforming cell is gold sodium sulfite. The hard gold layer electroforming bath components also include: hard gold stabilizers, hard gold supplements, alkali chemicals, acid regulators, hard gold stabilizers and cylinder openers. Ready-made hard gold layer electroforming bath materials are available from Bailai Chemical Co., Ltd. (http://www.pinohk.com) in Kwai Chung, New Territories, Hong Kong or Pino Aliprandini (http://www.aliprandini.ch) in Switzerland. The exemplary operating conditions for the hard gold layer electroforming cell can be as follows:

The following is an example of the implementation of the electroforming process conditions such as time and temperature:

Electroforming time calculation:

1 Set current (A) = preset current density (A / dm ² ) X total area of cast gold (dm ² ) 2 Estimated total weight of cast gold (g) = thickness of cast gold (dm ² ) X total area of cast gold (dm ² ) X0.0193 ( g / dm ³

3 Estimated gross weight of cast gold (g) = estimated single piece weight (g) X goods number of pieces

4 Standard electroforming efficiency [g/(A*min)] = actual electroforming gold weight of electroforming goods (g) 相应 corresponding ampere minutes

(A · min)

5 amp minutes (A*min) = total weight of cast gold (g) ÷ standard electroforming efficiency [g/ (A · min)]

6 Electroforming time (min) = Ampere minutes (A*min) 设定 Set current (A)

Temperature: 35-45 °C

Electroforming result

Thickness: 80 μ ΐΉ-350 μ ΐΉ

Gold content: 99.9%

Density: 19.3 g/dm ^{3 After} forming the hard gold inner casing 110, the wax mold 130 with the hard gold inner casing 110 is placed in a velvet gold electroforming cell to form the soft velvet sand gold outer casing 120. The main component of the velvet gold electroforming pool velvet sand gold electroforming cell is gold salt or potassium cyanide. The composition of the velvet gold electroforming pool also includes: supplements (such as Bailey 2401 supplement), humectants, additives, stabilizers, PH conditioner (phosphoric acid), cylinder openers, fluff gloss (such as Zhihe CGF06 fluff gloss) ), and PH09 lowering agent. Ready-made velvet gold electroforming bath materials can also be purchased from Bailai Chemical Co., Ltd., Zhihe Technology (Asia) Co., Ltd. and/or ESSB Technology Development Co., Ltd. The exemplary operating conditions for the velvet gold layer electroforming cell can be as follows:-

Electroforming results (thickness, gold content, density)

Thick and thick

Degree of gold : 50-200um

Quantity: 99. 9%

: 19. 3g/ dm ³

After the formation of the velvet sand gold outer body 120, the surface of the decoration can be modified by a conventional process such as car flower and sand. After the modification is completed, the product is heated in a high-temperature furnace, and the wax removal process is performed to melt the wax in the casting. Finally, a process of removing the conductive layer 132 is performed. This process removes the silver conductive layer 132 with nitric acid. The present invention has been described in detail for the purpose of illustration and description of the present invention. Rather, the modifications and equivalent arrangements are intended to be included within the spirit and scope of the appended claims. For example, it is to be understood that the present invention contemplates combining one or more features of any embodiment with one or more features of any other embodiments, to the extent possible.

Claims

claims

1. A furnishing piece, characterized in that it includes a hard pure gold shell and a soft pure gold surface layer covering the hard pure gold shell and having a surface texture, wherein the hard pure gold shell has The hardness is higher than the hardness of the soft pure gold surface layer.

2. A furnishing piece as claimed in claim 1, wherein the hardness of the hard gold shell is 40Hv or higher than the hardness of the soft pure gold surface layer.

3. A furnishing as claimed in claim 1 or 2, wherein the hardness of the hard gold shell is higher than 80Hv, for example, higher than 90Hv, or higher than 100Hv, for example.

4. A furnishing piece according to any one of the preceding claims, wherein the hardness of the hard solid gold shell is lower than 180Hv, for example, may be lower than 150Hv.

5. A furnishing piece according to any one of the preceding claims, wherein the hardness of the soft pure gold surface layer is lower than 60Hv, for example, it can be lower than 50Hv, or it can be lower than 40Hv, for example.

6. A furnishing piece according to any one of the preceding claims, wherein the thickness of the hard solid gold shell is more than 60 microns, for example, more than 80 microns.

7. A furnishing piece according to any one of the preceding claims, wherein the thickness of the hard solid gold shell is less than 350 microns, for example, less than 200 microns.

8. A furnishing as claimed in claim 1, wherein the thickness of the soft pure gold layer is less than 80 microns, for example, less than 20 microns.

9. A furnishing piece as claimed in claim 1, wherein the soft pure gold surface layer has a suede surface, a sand surface, a suede surface, or other uneven surface textures.

10. A furnishing piece as claimed in claim 9, wherein the depth of the uneven surface texture of the soft pure gold surface layer is greater than 0.05 microns.

11. A furnishing piece according to any one of the preceding claims, wherein the hard solid gold shell is formed by electroforming.

12. A furnishing piece according to any one of the preceding claims, wherein the soft pure gold surface layer is electroformed on the hard pure gold shell.

13. A furnishing piece according to any one of the preceding claims, wherein the hard solid gold shell is a hollow or hollow shell, and the hardness or rigidity of the hollow or hollow shell is sufficient to support the soft gold shell. Pure gold surface.

14. A furnishing piece according to any one of the preceding claims, wherein the hard pure gold shell forms the shape of the furnishing piece and the soft pure gold surface layer forms the surface decorative texture of the furnishing piece, and the surface decoration The texture is suede, sand, velvet sand, or other uneven surface textures.