1. Pattern Making: Wooden patterns are typically created based on engineering drawings. Once the pattern is completed, it serves as a template for molding.
2. Sand Mixing: In preparation for molding, old and new sand are mixed in specific proportions, along with appropriate amounts of clay to create a molding compound.
3. Mold Making:
· Pit Molding: The molding process involves creating a cavity in the sand that corresponds to the shape of the casting.
· Core Making: Internal shapes of the casting are produced using cores made of sand.
· Mold Assembly: The cores are placed within the mold cavity, and the mold halves are clamped together.
4. Metal Melting:
· Charge Preparation: The necessary metallic elements are proportioned and charged into the melting furnace.
· Melting: The charge is melted to produce liquid metal.
5. Pouring:
· Ladle Filling: The molten metal is poured into a ladle.
· Pouring: The molten metal is poured into the mold cavity, ensuring that the mold is completely filled.
6. Cleaning:
· Shakeout: After solidification, the casting is removed from the mold and the adhering sand is shaken off.
· Shot Blasting: The casting is subjected to shot blasting to remove any remaining sand or scale.
· Inspection: The casting is visually inspected for defects. For more stringent requirements, non-destructive testing (NDT) is employed.
7. Inspection:
· Non-Destructive Testing (NDT): Castings are typically subjected to NDT methods to detect internal flaws or defects.
CPTC offers custom steel casting processing services based on customer drawings and samples.