Pouring time-

The pouring time or the pouring rate of a casting depends upon the casting material and the configuration of casting since the cooling rate varies form material to material and is significantly affected by the volume and surface area of casting. If the pouring rate is low, the molten metal may start solidifying before the mould cavity is filled. On the other hand, higher pouring rate may cause erosion of mould cavity and turbulence. The pouring rate is, however, chosen to ensure complete filling of mould cavity before solidification starts.