The weight of tractor box castings is 205KG, and the estimated gating system mass is 20kg. According to the manual, for thin-walled complex castings with a weight less than 450kg, the pouring time can be obtained according to the empirical formula:
Where:
T – pouring time, s;
Total weight of molten metal in GL-1 cavity, kg:
S – coefficient related to wall thickness.
The wall thickness of tractor box castings is greater than 10ram. It can be seen that s can be taken as 2.2, so the pouring time is:
