The document outlines the process of manufacturing copper coins which involves molding and engraving a master hub, creating working dies, punching coin blanks, annealing and pickling the blanks, sorting and striking the coins using the dies, and finally inspecting, counting, and packaging the coins. It also discusses the cost of manufacturing copper coins over time and notes properties of copper coins such as corrosion resistance, ability to form alloys easily, being hygienic, and having an attractive color.

1. COPPER COIN
SUTHARSHANAN MANIAM (2170184)
DHIYANESHBABU NOOKARAJU (2170160)
DHARSANNEN SRI SELVAM (2170204)
NAGALINGGAM SUKUMARAN (2170214)

2. PROCESS OF MANUFACTURING
 Molding and engraving the master hub
 A larger clay model was sculptured and the inscriptions were inserted
 Creating the working dies
 The master hub was then pressed on molten metal to form die
 Punching out the blanks
 Annealing and pickling the blanks

3. PROCESS OF MANUFACTURING
 Sorting and weeding the blanks
 Metal sheet fitted with holes that match the exact size of the coin
 Striking the coins
 The blanks are stamped with the die by the conveyer belt
 Inspecting and sorting
 Misshapen and dented coins are removed
 Counting and bagging
 Coins are counted and packaged according to the number

4. COST
Graph shows the cost
of manufacturing
copper time over
time

5. PERFORMANCE AND ACCURACY
 Corrosion Resistance
 Alloys Easily
 Hygienic
 Attractive Colour