Which redistribution process uses gravity or pressure in a metal mould to fill the cavity?

Which redistribution process uses gravity or pressure in a metal mould to fill the cavity?

• A. Sand casting
• B. Die casting (gravity/ pressure in metal moulding)
• C. Investment (lost wax) casting
• D. Low-temperature pewter casting

Answer: (B)

Die casting uses a metal die and fills the cavity either by gravity or by forcing the molten metal into the cavity under high pressure. The mould is a hardened metal die, closed tight, and the metal fills through channels or a shot system. Gravity die casting relies on the weight of the molten metal to fill the cavity, while pressure die casting pushes the metal into the die at high pressure for fast, accurate filling. This gives good dimensional accuracy and smooth surfaces, which is why it's chosen for high-volume production. Other methods use sand or ceramic moulds (not metal moulds) or rely on pouring rather than filling under pressure, so they don’t match the described process.

Die casting uses a metal die and fills the cavity either by gravity or by forcing the molten metal into the cavity under high pressure. The mould is a hardened metal die, closed tight, and the metal fills through channels or a shot system. Gravity die casting relies on the weight of the molten metal to fill the cavity, while pressure die casting pushes the metal into the die at high pressure for fast, accurate filling. This gives good dimensional accuracy and smooth surfaces, which is why it's chosen for high-volume production. Other methods use sand or ceramic moulds (not metal moulds) or rely on pouring rather than filling under pressure, so they don’t match the described process.