Molded cold iron complex structure Aeroengine Casting method Heavy castings

A molded Casting cold iron complex aeronautical engine structure Heavy castings using the method comprising the steps of: forming cold iron produced by an investment casting process; Casting mold production using wax; shell made using a wax mold, coating a slurry consist of silicon dioxide content of 25% -30% of silica sol and Emery, the ratio of silica added per Kg 3-4Kg Emery, sanding, coating with three 80 # -100 # emery paste after application after the five layers on the need for cooling of the casting shell with a position of the shaped wire is fixed to the cold iron shell, and then continue to prepare a coating shell; prepared using the shell pouring, casting shell when preheating temperature 900 ℃ -1000 ℃, casting temperature 1560 ℃ -1610 ℃; shelling, cutting and cleaning the casting after the casting made. The casting method can solve complex with the deep cavity portion of loose structure problem.