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The term comes from the initial use of the process: manufacturing of coins. Coining is used to manufacture parts for all industries and is commonly used when high relief or very fine features are required. For example, it is used to produce coins, badges, buttons, precision-energy springs and precision parts with small or polished surface features.
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Methods used at mints to produce coins have changed as technology has developed, with early coins either being cast using moulds to produce cast coins or being struck between two dies to produce hammered coin. Around the middle of the 16th century machine-made milled coins were developed, allowing coins of a higher quality to be made.
A coin die itself, has been the main motive for many collectors coins and medals. One of the most recent and famous one, is the Austrian 700 Years City of Hall in Tyrol coin, minted on January 29, 2003. The reverse side of the coin shows the Guldiner silver coin. However, the design is negative, representing a coin die, as a reference to Hall's ...
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Each coin is formed in a single operation. The press holds two negatives (molds that show each side of the coin) The body (material from which the coin is to be formed) is placed on the lower negative and the upper negative is lowered to create pressure sufficient to emboss the negatives onto the body. The upper negative descends directly ...
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