Lost foam casting control-transferring semi-solid process for cast iron was described.First

the foamed pattern was produced with polystyrene and polymethyl methacrylate bead;second

the liquid metal is not prepared semi-solid slurry before pouring but directly poured at slightly below liquidus temperature to control the creation of small amounts of solid phase during pouring.Based on the mentioned technique

the size and surface of produced cast iron castings can be greatly improved

meanwhile

the techniques have the advantages of riser-free and no sand treatment.