1. feed molten metal to casting as it solidifies
2. prevent atmospheric air form contaminating the metal in the mold
3. allow the gases to easily escape from mold cavity
4. allow molten metal to rise above the mod cavity
feed molten metal to casting as it solidifies
1. promote directional solidification
2. help alloying the metal
3. facilitate easy removal of core from casting
4. prevent core movement due to buoyancy
prevent core movement due to buoyancy
1. 10
2. 20
3. 24
4. 40
20
1. 10
2. 20
3. 24
4. 40
20
1. 16 min
2. 2 √8 min
3. 8 min
4. 4 min
8 min
1. 16 min
2. 2 √8 min
3. 8 min
4. 4 min
8 min
1. 48.32mm
2. 49.90mm
3. 49.94mm
4. 49.96mm
48.32mm
1. the temp of liquid metal drops from pouring to freezing temp
2. the metal changes from liquid to solid state at freezing temp
3. the temp of solid phase drops from freezing to room temp
4. the temp of metal drops from pouring to room temp
the temp of solid phase drops from freezing to room temp
1. pouring temp of the liquid metal
2. freezing temp of the liquid metal
3. the component size
4. Coefficient of thermal contraction of solidified metal
pouring temp of the liquid metal
1. 1.14
2. 0.87
3. 1.31
4. 0.76
1.31