Casting Molten 1. is poured into mould to solidify into 2. .
Techniques: • lost-wax process → molten metal into 3. model •4. casting → for low melting point, 5. materials • die casting → molten metal forced under 6. into mould cavity • sand casting → 7. metal into sand mould
Forging Shaping of metal through hammering, pressing, or rolling with 8. or die. •9. forging (soft metals) improves 10. • hot forging (iron and its 11. ) improves 12.
8.1 Say if the sentences are true (Vero) or false (Falso).
1. A metal casting process is used in fine arts because it is an expensive metalworking method.
2. In a lost-wax process, once the mould is made, the wax is melted.
3. Plaster casting is a technique used with non-ferrous materials.
4. In die casting, the dies are generally made of aluminium.
5. In sand casting, the mould is made of liquid metal.
6. Forging is used in automotive industries because it can produce large quantities of identical parts.
7. Cold forging improves the strength of hard materials.
8. Hot forging improves iron’s ductility.
8.2 Correct the false sentences from the previous exercise.aperta
Soluzione suggerita:1. False, It is an inexpensive way to create complex shapes; 2. True; 3. True; 4. False, They are made of steel; 5. False, It is made of sand; 6. True; 7. False, Of soft materials; 8. True.
9.1 Match each term to its Italian translation.
PinzaRitiroColataStantuffo
Shrinkage →
Plunger →
Pin →
Sprue →
9.2 Watch the video and put the steps of die casting in the correct order.