In a cold chamber die casting machine

Explanation:

Hot-chamber die casting:

• It has a melting furnace as a part of the machine.
• It is used for low melting point metals such as Zn and Sn.
• It has greater molten metal contamination.
• Reduces time to deliver the liquid metal.

Cold – Chamber die casting: 

• In this casting method, the furnace is separated from the casting unit so the correct answer is option 1.
• It is used to produce high melting point material casting.
• The force required to move the liquid metal into the die will be high when compared to hot chamber die casting. 
• Brass, Copper Aluminium and Magnesium is commonly cold die-casting metals.