Nickel-clad steel coin by combining lines and fine patterns as well as its making technology

Abstract

The invention discloses a nickel-clad steel coin by combining lines and fine patterns as well as its making technology. The material of the coin is a steel core nickel-plated material, the pattern of the coin is composed of points and lines, the pattern of the coin with different effects can be observed from different angles; the making technology is characterized in that a fine pattern SCD security line design system is used for carrying out refinement on the pattern of a coin draft in the forms of point and line, the produced fine pattern draft is transferred to an engraving file through CAM software, then a computer engraving machine or a laser engraving machine is used for engraving patterns on a die, a multiple turning mode is used for turning and compressing to an impression, the produced impression is used for compressing a coin possessing a fine pattern characteristic on a billet cake of a nickel-clad steel material. The making technology of the present invention realizes an application of a steel core nickel-plated material on coins, the technical content of the coins can be enhanced, the difficulty for counterfeiting the coins can be raised, and the strong artistic expression can be brought to the coins.

Description

Technical field: [0001] The invention relates to a coin and its anti-counterfeiting technology, in particular to a nickel-clad steel coin with a combination of lines and fine patterns and its manufacturing process. Background technique [0002] In the process of mold engraving, the pattern on the mold is expressed by dots and lines through the combination and arrangement of fine lines and the transformation of spacing, and the pattern is refined. Since the width, depth and spacing of fine lines and dots are very small, and SCD pattern design system software and high-precision laser engraving machine or computer engraving machine are required for production. Therefore, general EDM equipment cannot be imitated and has a high anti-counterfeiting effect. Applying this technology to coins can not only improve The public anti-counterfeiting performance of coins, but also can improve the appearance of coins. The back of the British £2 circulation coin adopts a simple arrangement o...

AI Technical Summary

Problems solved by technology

The back of the British £2 circulation coin adopts a simple arrangement of single lines, but its material is copper alloy, which is lower in hardness than nickel-plated steel core, and the forming of the lines is easier, while the steel core plated with lines combined with fine patterns Nickel coins express the pattern on the coin through dots and lines, and carry out refined processing. Moreover, the nickel-plated steel core material itself has high hardness. During the embossing process, the loss of dots and lines is greater. Reducing the loss of dots and lines in the embossing process is also a difficult point in the production of this coin. Therefore, it is technically difficult to apply line combination fine patterns on nickel-plated steel core materials. Combination of lines and fine patterns on material coins Anti-counterfeiting measures have not yet been adopted in the field of coins in circulation

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