Which process uses two halves of a mould and a core to create metal parts, with the core typically destroyed after cooling?

Which process uses two halves of a mould and a core to create metal parts, with the core typically destroyed after cooling?

• A. Shell moulding
• B. Die casting
• C. Sand casting
• D. Investment casting

Answer: (A)

Shell moulding relies on forming a pair of thin, rigid shell halves that come together to create the mould cavity. A pattern is used to shape each half by applying a resin-bonded sand, so when the two shells are clamped around the pattern they form a precise cavity for the molten metal. If the component has internal hollows, a core can be inserted inside the shell to establish those features. After pouring and the metal cools, the ceramic shell is broken away to recover the casting, and the core is typically sacrificed or removed during that process. This approach gives good surface finish and precise dimensions with thin-walled sections, suitable for small to medium production.

Shell moulding relies on forming a pair of thin, rigid shell halves that come together to create the mould cavity. A pattern is used to shape each half by applying a resin-bonded sand, so when the two shells are clamped around the pattern they form a precise cavity for the molten metal. If the component has internal hollows, a core can be inserted inside the shell to establish those features. After pouring and the metal cools, the ceramic shell is broken away to recover the casting, and the core is typically sacrificed or removed during that process. This approach gives good surface finish and precise dimensions with thin-walled sections, suitable for small to medium production.