Compare expendable and permanent moulds and where each is used.
Section 1
Distinguish between expendable and permanent moulds.
Describe common mould materials and their properties.
Match a mould type to a typical application and production volume.
Section 2
Expendable moulds, such as sand moulds, are destroyed to remove the casting and are ideal for complex shapes and low-to-medium production runs. Permanent moulds, usually made of metal, are reused many times and suit high-volume production of simpler geometries.
The choice depends on the part complexity, required surface finish, production volume, and the metal being cast.
Silica sand bonded with clay is the most common expendable mould material because it is cheap, refractory and reusable after reconditioning. Permanent moulds are made from cast iron, steel or graphite, which withstand repeated thermal cycling.
Section 3
Interactive animation will appear here.
Animated visualizations for this mission are being crafted and will be embedded in this space.
Section 4
Interactive activity coming in Sprint 3.
Hands-on drag-and-drop and simulation activities will be unlocked here in the next sprint.
Section 5
Answer all 5 questions correctly to unlock the next mission.