Extruding

Northwest Territorial Mint: The Extruding Process
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From Billet to Sheet

The solid metal forms referred to as "billets" are dislodged from the steel containers and transported to the billet oven (shown at right), where they are reheated for 15 minutes at approximately 1,000 degrees Fahrenheit in preparation for the next step in the process. Using specially designed channel locks to collect the heated billets from the oven, technicians load the billets into a massive machine called an extruder, which operates under extreme pressure to fashion the heated forms into thin strips of soft, annealed metal.

The extruded strips are then sent to the roller, where they are rolled to precise thicknesses.

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Northwest Territorial Mint: Insights & Ideas
Silver Bar
Hot Topic: Extruded Bars

When Pan American Silver wanted a solution for minting 100 Troy Ounce silver bullion bars, Northwest Territorial Mint proposed manufacturing these from extruded silver which is then sand blasted and pressed. The result is a highly acclaimed bar purchased as an investment but prized for its beauty.

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Northwest Territorial Mint: In The News

The Tin Star

Northwest Territorial Mint: Did You Know?As the cattle industry and mining expanded into the American West, so too did the number of people on the frontier. A means of marking the local Peace Officer soon became necessary. Lack of local badge-makers meant such lawmen had to make their badges from materials at hand. The tin star evolved as a star cutout from the top or bottom of a tin can. Another popular method of making a badge was to use a coin and cut out a star from the center. The Texas Rangers cut a star shape from a coin: the 1800s Mexican Ocho Reales (pieces of eight). In 1962 the Rangers resumed this practice using the 1940s Mexican Cinco Peso coins.