Casting process design
Optimize the pouring system: Rationally design the pouring position and pouring system to ensure smooth flow of molten metal and reduce pores and inclusions.
Layout of risers and chillers: Set risers at the last solidified part of the casting to delay the solidification of the molten metal around the risers, form sequential solidification conditions, and reduce shrinkage and shrinkage defects.
Process correction amount: Determine the appropriate process correction amount according to the shrinkage rate of the casting to ensure the dimensional accuracy of the casting.
Casting method
Sand casting: Suitable for castings with complex shapes and uneven wall thickness, with low cost and high production efficiency. Commonly used sand molds include wet sand, dry sand, water glass sand and furan resin self-hardening sand.
Special casting: Such as lost wax casting, die casting, etc., suitable for castings with high precision and high surface quality requirements.
Melting and pouring
Melting equipment: Usually a medium-frequency induction furnace is used to accurately control the temperature and time to ensure the quality of the molten metal.
Pouring operation: During the pouring process, control the temperature and flow rate of the molten metal to avoid the formation of pores and inclusions.
Casting processing and inspection
Cleaning and finishing: Remove foreign matter, pouring heads and burrs on the surface of the casting, and perform heat treatment and rust prevention.
Quality inspection: Ensure that the casting meets the design requirements through non-destructive testing (such as X-ray, ultrasonic) and mechanical property testing.
