The United States Mint released the following today concerning the
2015 American Liberty, High Relief $100 gold
coin that goes on sale at noon Eastern Daylight Time July 30:
Mint Technical Staff Aides Development of 2015 American Liberty,
High Relief Gold Coin
the Mint came up with the idea for the 2015 American Liberty, High
Relief Gold Coin, the United States Mint's technical staff was tasked with the challenge of
determining the viability.
development team at the Philadelphia facility started on a test design,
or high-relief nonsense design, that would embody the high-relief
elements of the yet to be determined designs. Based on several
technical factors, the 2009 Ultra-High-Relief obverse and reverse
designs were selected and modified with powerful 3-D sculpting
software to the proposed diameter and edge thickness configurations of
the 2015 high-relief gold coin.
the software phase, the team developed gold blank specifications and
ordered test blanks. Concurrently, using state-of-the-art technology,
the team manufactured research dies directly on computer numerical
controlled, or CNC, milling machines. Milling is a machining process
that uses a rotating cutting tool to etch the design onto the metal
die, which is used to strike the coin.
the gold test blanks arrived, the coin development team struck 20 gold
coins to test the coining characteristics of this high-relief concept.
The strikes were successful, and the resulting coins were used to
develop specifications for coin-to-capsule fit so capsule molds could
be manufactured well ahead of final coin availability.
after the team completed research strikes, the final 2015 American
Liberty, High Relief Gold design arrived. Once the team finalized the
gold sculpts in plaster, they scanned and converted obverse and
reverse plaster models into digital 3-D data. The technical staff
loaded these data sets into computer-aided design software, where
lettering, date, mint mark and other features were added. The team
then adjusted the sculpts for maximum coinability and started the
formal master tooling process.
the gold coin, the team completed the Design Validation, or DV, die
manufacturing process, worked on DV strikes, conducted coin-to-capsule
fit tests, and sent the coins and capsules to Headquarters for acceptance.
sent 100 pairs of "W" mint mark gold dies to West Point for production striking.