Double-faced relief noble metal foil and forming process thereof

Abstract

The invention discloses a forming process of a double-faced relief noble metal foil. The forming process comprises the following steps: calendaring a noble metal blank to form a noble metal foil material with a predetermined thickness; forming a noble metal foil with predetermined shape and dimension from the noble metal foil material; carrying out annealing treatment on the noble metal foil; cleaning, and drying the noble metal foil; putting a to-be-embossed noble metal foil on a lower mold, selecting an upper mold according to the required pattern, and pressing the upper surface of the noble metal foil to form a relief pattern, wherein the surfaces, which are not stamped with the patterns, of two noble metal foils are opposite; a bonding layer is arranged between the two noble metal foils; and pressing to form the integrated double-faced relief noble metal foil. Compared with the prior art, on the basis of realizing the maximal area with the minimal gram weight of the foil to the maximal extent, the double-faced relief noble metal foil can be obtained by employing the forming process disclosed by the invention; and relatively high product yield can be obtained by relatively good manufacturability. On this basis, the invention further provides a double-faced relief noble metal foil prepared by the forming process.

Description

technical field [0001] The invention relates to a manufacturing technology of precious metal products, in particular to a double-sided embossed precious metal foil and its forming process. Background technique [0002] Precious metals have high value-preserving properties and are favored for this, such as gold products. Many gold handicrafts on the market use gold as a carrier, organically integrating precious metals and culture through creative design and modern technology. This product has distinct cultural attributes, showing high design value, craft value and commemorative value. According to the product form, its main manifestations are: coins, chapters, strips, bricks and gold foils, etc. [0003] As we all know, gold foil is a thin sheet formed by the extension of gold, and its processing and production is a special traditional craft with a history of more than two thousand years. In the existing technology, gold bars with a gold content of 99.99% are turned into go...

AI Technical Summary

Problems solved by technology

Covering the pattern film on the surface of the gold foil will directly lose the color advantage of gold itself. In addition, the mimeograph pattern film cannot compare with the three-dimensional relief pattern on the gold foil body, which further directly affects the customer experience

In addition, the above problems also exist in the processing of other precious metal foil products

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