Gold-clad silver processing method and gold-clad silver product

Abstract

The invention discloses a gold-clad silver processing method and a gold-clad silver product, and relates to the technical field of metal processing. The gold-clad silver processing method comprises the following steps: S1, silver blank treatment: polishing a silver blank to be smooth so as to remove surface impurities; s3, gold coating: coating the treated silver blank with a gold layer; s4, skin puncturing is conducted, specifically, a vertebral body is used for puncturing the skin layer, and multiple exhaust holes are formed; s5, pressing: applying pressure from one end of the product to the other end of the product, and discharging residual gas in the interlayer from the exhaust hole; s6, water passing and leveling are conducted, specifically, the surface of the gold skin layer is heated and leveled through water passing so that skin pricking traces can be eliminated; and S7, wire drawing and attaching are conducted, specifically, the product is drawn to the needed outer diameter through a wire drawing machine so that the gold skin layer can be tightly attached to the silver blank. By the adoption of the technical scheme, the method has the advantages that bubbles in the interlayer are eliminated, the fitting degree between gold and silver is enhanced, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and in particular to a gold-plated-silver processing method and a gold-plated-silver product. Background Art

[0002] In the metal processing industry, gold-plated silver products are favored by the market for their unique appearance and value. They are manufactured by wrapping a layer of gold on a silver substrate to protect the silver inside from oxidation and give the product a more precious appearance. However, during the traditional gold-plated silver processing, bubbles are easily generated between the gold layer and the silver substrate. These bubbles are caused by the failure to completely exhaust the air during the coating process or the thermal expansion and contraction effect during heating and cooling. In addition, the different thermal expansion coefficients of gold and silver materials will also cause stress concentration at the bonding interface, affecting the adhesion between the two. Bubbles not only affect the aesthetics of gold-plated silver products, but more importantly, they will reduce their durability and stability. Over time, these bubbles may expand, causing the gold layer to peel and flake off, exposing the underlying silver material, making it susceptible to oxidation and discoloration. Summary of the invention

[0003] The purpose of the present invention is to provide a gold-plated silver processing method and a gold-plated silver product in view of the defects and shortcomings of the prior art, which has the advantages of eliminating bubbles in the interlayer, enhancing the fit between gold and silver, and improving product quality.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a gold-plated silver processing method, comprising the following steps:

[0005] S1. Silver blank processing: polish the silver blank to remove surface impurities;

[0006] S3, gold coating, coating the treated silver blank with a gold skin layer;

[0007] S4, pricking the skin, using the vertebral body to pierce the golden skin layer to form multiple vents;

[0008] S5, pressing, applying pressure from one end of the product to the other end, and exhausting the residual gas in the interlayer from the exhaust hole;

[0009] S6, water leveling, heating and water leveling the surface of the gold skin layer to eliminate the traces of thorns;

[0010] S7, wire drawing and bonding: the product is drawn to the required outer diameter by a wire drawing machine so that the gold skin layer and the silver blank are closely fitted.

[0011] The present invention further provides that, in step S3, the vertebral body is penetrated to a depth greater than the thickness of the gold cortex.

[0012] The present invention is further arranged that the heating method in S6 is: heating by induction or infrared.

[0013] The present invention is further arranged that, between S1 and S3, it further includes: S2, drying the silver blank after cleaning.

[0014] To achieve the above object, another technical solution adopted by the present invention is: a gold-plated silver product is made by the gold-plated silver processing method described above.

[0015] The present invention further provides that the gold-clad silver product comprises: a silver blank, and a gold skin layer coated on the outer surface of the silver blank.

[0016] The present invention further provides that the gold-clad silver product also includes: an adhesive arranged between the silver blank and the gold skin layer.

[0017] After adopting the above technical scheme, the beneficial effects of the present invention are as follows: in the present invention, a plurality of exhaust holes are formed by puncturing the gold cortex with a cone, and pressure is applied from one end of the product to the other end of the product to discharge the residual gas in the interlayer through the exhaust holes, so as to reduce or eliminate the bubbles in the interlayer of the gold-clad silver product; then the surface of the gold cortex is heated to make it easier to fit the silver blank, and the heated product is placed in a liquid to promote slight softening and flattening of the surface of the gold cortex, ensuring that the gold cortex evenly covers the silver blank, thereby improving the fit between the gold cortex and the silver blank, and finally, by wire bonding, the fit is further enhanced, thereby producing high-quality, bubble-free and beautiful-looking gold-clad silver products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a flow chart of the steps of the gold-plated silver processing method;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of gold-clad silver products.

[0021] Description of the accompanying drawings: 1. Silver blank; 2. Gold skin. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0024] This embodiment relates to a gold-plated silver processing method, referring to Figure 1 , including the following steps:

[0025] S1, processing the silver blank 1, polishing the silver blank 1 to be smooth to remove surface impurities;

[0026] S3, gold coating, coating the gold skin layer 2 on the treated silver blank 1;

[0027] S4, pricking the skin, using the vertebral body to pierce the gold cortex 2 to form multiple exhaust holes;

[0028] S5, pressing, applying pressure from one end of the product to the other end, and exhausting the residual gas in the interlayer from the exhaust hole;

[0029] S6, water leveling, heating and water leveling the surface of the gold skin layer 2 to eliminate the traces of thorns;

[0030] S7, wire drawing and laminating: the product is drawn to a desired outer diameter by a wire drawing machine so that the gold skin layer 2 and the silver blank 1 are closely fitted.

[0031] Among them, in S1, a grinding tool is used to grind the surface of the silver blank 1 to remove the oxide layer and impurities, provide a clean and flat surface, ensure that the subsequent gold skin layer 2 can fit tightly, and reduce the possibility of bubbles in the interlayer. The grinding tool can be sandpaper or an electric grinder to grind the silver blank 1. In S3, the prepared gold skin layer 2 is cut according to the size of the silver blank 1, and the gold skin layer 2 is tightly wrapped on the silver blank 1 using manual or automatic coating equipment to form a protective layer to prevent the silver blank 1 from oxidizing. It should be noted that the size of the gold skin layer 2 and the silver blank 1 is not specifically limited here.

[0032] In S4, a cone tool is used to pierce tiny holes on the surface of the gold cortex 2 to form multiple exhaust holes, and the penetration depth is controlled to avoid damaging the silver blank 1. Specifically in this embodiment, the depth of cone penetration is greater than the thickness of the gold cortex 2, so that the gold cortex 2 can be pierced to form exhaust holes, so as to just pierce the gold cortex 2 without piercing the silver blank 1. The cone tool can be a customized needle-shaped or multi-cone tool, which can be manually operated or installed on an automated device. In S5, pressure is applied from one end of the product to the other end to cause the gas in the interlayer to be discharged through the holes formed by piercing the skin, thereby reducing the bubbles in the inner interlayer and improving the fit between the gold cortex 2 and the silver blank 1. Specifically, a gradually increasing pressure method is adopted to avoid unnecessary damage to the gold cortex 2 and ensure that the bubbles are effectively discharged. Specifically in this embodiment, a fixing device is required to ensure that the product does not move during the pressing process. In some embodiments, an exhaust monitoring device can be used to detect whether the gas is completely discharged.

[0033] In S6, the surface of the gold skin layer 2 is heated to an appropriate temperature to slightly soften the gold skin, making it easier to fit the silver blank 1. Specifically in this embodiment, the heating method in S6 is: heating by induction or infrared to ensure that it can be appropriately softened without causing deformation or damage. Induction heating and infrared heating are both non-contact heating methods, which can avoid surface damage or contamination caused by direct contact, ensure the close fit quality between the gold skin layer 2 and the silver blank 1, and quickly reach the required temperature to reduce processing time. In other embodiments, the heating in S6 can also be other heating methods. Immerse the product in warm water or cover its surface with a spray, use liquid to help level it, and restore the smoothness and flatness of the surface of the gold skin layer 2. After the surface leveling treatment, the thorn marks are eliminated, ensuring that the gold skin evenly covers the silver blank 1, achieving an ideal appearance and fitting effect, and improving the fit between the gold skin layer 2 and the silver blank 1. In S7, a wire drawing machine is used to stretch the product to the required outer diameter to ensure that the gold skin layer 2 fits tightly with the silver blank 1, and the tension during the wire drawing process is evenly distributed to prevent wrinkles or unevenness in the gold skin layer 2. Therefore, wire drawing further enhances the fit, thereby producing high-quality, bubble-free and beautiful gold-clad silver products.

[0034] In this embodiment, refer to Figure 1 Between S1 and S3, the following steps are included: S2, drying the silver blank 1 after cleaning. The cleaning process can effectively remove fine particles, oil stains or other impurities that may remain during the polishing process. If these impurities remain on the surface of the silver blank 1, they may affect the bonding quality between the gold skin layer 2 and the silver blank 1 in subsequent processes.

[0035] In some embodiments, the gold-plated silver processing method can be applied to, but not limited to, the following fields: jewelry, handicrafts, watchmaking, electronic components, medical equipment, automobile decoration and gift industries, etc.

[0036] This embodiment also relates to a gold-plated silver product, referring to Figure 2 , which is made by the gold-plated silver processing method described above. The gold-plated silver product has the function of reducing or eliminating bubbles in the interlayer, can enhance the overall fit, and improve the product quality and aesthetics. Specifically, the gold-plated silver product includes: a silver blank 1 and a gold skin layer 2 coated on the outer surface of the silver blank 1. The silver blank 1 is mainly composed of pure silver or silver alloy, and can be designed into various shapes as required, such as strips, sheets, cylinders, etc., and is polished to remove surface impurities to ensure good fit with the gold skin layer 2. The gold skin layer 2 is composed of pure gold or gold alloy, provides anti-oxidation protection and decorative functions, and its thickness is usually set to be thinner to control costs while ensuring sufficient protection effect.

[0037] In this embodiment, the gold-clad silver product further includes: an adhesive (not shown) disposed between the silver blank 1 and the gold skin layer 2. The adhesive can significantly increase the bonding force between the gold skin layer 2 and the silver blank 1, ensuring that the two fit closely and reducing the risk of delamination or peeling. At the same time, for gold-clad silver products with complex shapes or many curved surfaces, the use of an adhesive can more easily achieve uniform coverage of the gold skin layer, simplify the coating process, and improve production efficiency. In other embodiments, other intermediate layers, such as a nickel layer or other alloy layer, can be added between the gold skin layer 2 and the silver blank 1 to increase wear resistance.

[0038] The above is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A gold-plated silver processing method, characterized in that: The following steps are involved: S1, processing the silver blank (1), polishing the silver blank (1) to be smooth to remove surface impurities; S3, gold coating, coating the gold skin layer (2) on the treated silver blank (1); S4, pricking the skin, using the vertebral body to pierce the golden skin layer (2) to form multiple vents; S5, pressing, applying pressure from one end of the product to the other end, and exhausting the residual gas in the interlayer from the exhaust hole; S6, water leveling, heating and water leveling the surface of the gold skin layer (2) to eliminate the traces of thorns; S7, wire drawing and laminating, the product is drawn to a desired outer diameter by a wire drawing machine so that the gold skin layer (2) and the silver blank (1) are closely fitted.

2. The gold-plated silver processing method according to claim 1, characterized in that: In step S3, the vertebral body is penetrated to a depth greater than the thickness of the gold cortex (2).

3. The gold-plated silver processing method according to claim 1, characterized in that: The heating method in S6 is: heating by induction or infrared.

4. The gold-plated silver processing method according to claim 1, characterized in that: Between S1 and S3, the following steps are also included: S2, drying the silver blank (1) after cleaning.

5. A gold-plated silver product, characterized in that: The invention is made by the gold-plated silver processing method described in any one of claims 1 to 4.

6. The gold-clad silver product according to claim 5, characterized in that: The gold-clad silver product comprises: a silver blank (1), and a gold skin layer (2) coated on the outer surface of the silver blank (1).

7. The gold-clad silver product according to claim 6, characterized in that: The gold-clad silver product further comprises: an adhesive arranged between the silver blank (1) and the gold skin layer (2).

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