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Minted bars and coins

The process of making Minted Bars and Coins (Gold Bullions or Silver Bullions) begins by melting some fine metal into the Static Melting Oven.
The melted gold or silver then goes into a continuos melting furnace which makes it into a thick strip cut to a certain length.

The strip goes trough a big rolling mill which reduced the thickness of the strip. At this stage some cleaning and degreasing is required before the strip goes into the belt furnace for an annealling step.
The thickness of the strip in now reduced again in the finishing rolling mill, then some side cutting is done in the strip cutter rolls.

The most common sizes of the minted bars and coins are the following:
- 1, 2, 5, 10, 20, 50 g (grams)
- 1 tola and 2, 3, 4, 5 tolas
- 1 tael and 5 taels
- 1 baht
- 1, 10 chi
- 1/10, 1/4, 1/2 and 1 oz (ounces troy)

Now the strip gets stamped into a press and, at this stage coin stamps or bars stamp can be used according to the requirement.
The packaging is the last step of the process and it’s done to protect the bars from scretches and to guarantee security and authenticity of the final product.

  • Production process

  • Static Melting oven to load the continuos casting furnace
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  • Continuos casting furnace
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  • Big rolling mill

  • Ultrasonic degreasing

  • Belt furnace for annealing. This will be used to anneal both strip and “blanks” before stamping as well
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  • Finishing rolling mill with chrome mirror rolls with cooling system

  • Strip cutter rolls

  • Press used to mint the coins or the bars

  • Stamp for coinage

  • Die for the blanks

  • Ingots packaging