The difference between Gravity casting and centrifugal casting

Gravity casting
Gravity casting, also known as permanent mold casting, is a process in which molten metal is poured into a mold and allowed to solidify using gravity alone. The mold is typically made of steel or cast iron and can be reused multiple times. The molten metal is poured into the mold through a gate, and once it has cooled and solidified, the mold is opened and the casting is removed. Gravity casting is often used to produce small to medium-sized objects that require high accuracy, such as engine parts, plumbing fixtures, and decorative objects.
Centrifugal casting
Centrifugal casting, on the other hand, is a process in which molten metal is poured into a spinning mold. The centrifugal force generated by the spinning motion of the mold distributes the molten metal evenly along the walls of the mold, resulting in a dense, high-quality casting with few defects. Centrifugal casting is often used to produce objects with complex shapes and intricate details, such as jewelry, dental restorations, and turbine blades for aircraft engines
Cravity casting Vs Centrifugal casting
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Gravity casting |
Centrifugal casting |
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Method of Casting: |
molten metal is poured into a mold using gravity. This means that the metal is poured into the mold from above, and allowed to flow into the mold naturally. |
molten metal is poured into a mold while the mold is spinning. The centrifugal force created by the spinning motion of the mold forces the molten metal into the shape of the mold. |
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Mold Design: |
Gravity casting typically requires a two-part mold that is opened after the casting has solidified. |
Centrifugal casting, on the other hand, can use a one-piece mold that is opened by cutting it away from the solidified casting. |
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Quality of the Casting: |
Gravity casting may result in less uniform and less dense casting due to the potential for air pockets and other impurities to become trapped in the metal as it flows into the mold naturally. |
Centrifugal casting usually results in a more uniform and denser casting due to the centrifugal force that helps to eliminate air pockets and other impurities. |
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Applications: |
Gravity casting is typically used for smaller and simpler shapes that do not require high precision or strength.
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Centrifugal casting is used for more complex and intricate shapes that require high precision and strength, such as turbine blades, gears, and other industrial parts. |
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Machinery product |
Engine blocks and cylinder heads for automotive engines Pump housings and impellers for industrial pumps Gears and pulleys for power transmission systems Heat exchangers and other components for HVAC systems Cast iron cookware, such as pots and pans, for the food industry |
Turbine blades and vanes for gas turbines and jet engines Pipe fittings and valves for industrial piping systems Rollers and cylinders for printing presses and paper mills High-strength components for aerospace and defense applications Rotors and stators for electric motors and generators |
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