Gravity Casting
Gravity casting is among the oldest known processes for fabricating metals and metal alloys. It involves the pouring of molten metal from a crucible into a mold under only the force of gravity, without the use of pressurized gases, vacuums, or centrifugal force.
Advantages of Gravity Casting
Cost Saving
More than 90% of the precision casting parts produced by gravity casting can be used without further machining, thus saving lots of costs.Easy for Operation
Simple Process
Gravity casting can be used to make products with simple or complex shapes.Reduce processing and waste: As gravity casting can be used to make products with complex shapes, it can simplify processing.Gravity Casting Process
2. Pour Molten Metal Into the Cavity
1. Preheat the Die and Coat the Mold Cavity
Before starting the gravity die casting process, the die (also known as the mold) is preheated to a certain temperature (differs for different metals) to prevent cold spots and ensure uniform solidification of the molten metal. Once the die is preheated and coated, it is securely clamped together. Molten metal, typically aluminum or other non-ferrous alloys, is then poured into a pouring basin or runner system that leads to the die cavity. 3. Allow the Metal To Solidify
As the molten metal is introduced into the mold cavity, it cools rapidly. Solidification starts first when the molten metal contacts the cooler surfaces of the mold, and progresses inward toward the center of the casting cross-section.After the molten metal has fully solidified within the die cavity, the clamps holding the die together are released. The die is opened, revealing the solidified casting.