The liquid metal is poured into the mold cavity with the same shape as the part, and the blank is formed after cooling. Compared with forging, it is more suitable for the production of parts with complex shapes.
Four Casting Methods
The wax mold of the casting is produced, and then the wax mold is assembled. The ceramic shell is built around the wax cluster, followed by dewaxing and pre-firing to ensure the performance of the mold. Finally, the alloy material is heated to a uniform molten state and then poured into the mold.
The basic principle of vacuum investment casting is also the same. But the difference is that the air in the mold will be removed first. The pressure difference is used to fill the molten alloy with the mold. This method is especially important when the alloy contains elements such as aluminum or titanium.
Sand casting is the most widely used casting method. It is more suitable for manufacturing large parts with thick cross-section. The shape of the casting is relatively simple. It is suitable for small batch production.
The resin sand is hardened by heat, and it is used to cover the heated metal template to form a thin shell. After the upper and lower two shells are adhered, the mold is formed without sand box.
The use of the resin shell process significantly reduces the amount of molding sand used. And the final casting has a smooth surface and accurate dimensions. The machining allowance is very small. It is suitable for castings with high precision, thin walls and complex shapes.
The liquid metal is poured into the high-speed rotating mold to make the metal liquid perform centrifugal movement to fill the mold and form a casting. It is an ideal method for producing hollow castings. The centrifugal force is used to press the molten metal against the mold wall to increase the density and reduce Gas-related defects,affecting the metal crystallization process, thereby improving the mechanical and physical properties of the casting.