ABOUT Centrifugal Casting
Technology: Centrifugal Casting Services are metal molding operations that produce cylindrical forms with molten metal that have both high exterior densities and low inclusions. Centrifugal casting is used to make thin walled cylinders, railway wheels, etc. and is an alternative to forging. In the casting process, the mold is rotated as molten metal is introduced. The spinning forces the heavier, denser metal toward the inside wall of the mold, while less dense impurities migrate toward the inside of the casting. These impurities are then machined away, resulting in a part with high integrity. Centrifugal casting techniques are used to mold other materials such as glass.Eliminates the need for gates/risersCores are unnecessary for hollow shapesCastings are isotropic, with equal properties in all directionsNo shrinkage as with sand castingMolds can be sand, permanent, or semi-permanent
Centrifugal casting is usually done at rotation rates of 300 to 3000 rpm. The machines can be horizonatal or vertical, with horizontal orientations preferred for long, slender castings such as pipe.
Semi-centrifugal casting similarly relies on rotating molds to cast metal parts but unlike traditional centrifugal casting, the parts are molded solid. Post casting machining is used to remove the interior core.
Centrifugal die casting is used to produce solid parts often with thin sections or details that would be difficult to achieve with static die casting. In this process, multiple molds are arranged around a central hub which rotates to force the molten metal to the outermost reaches of the spinning molds.
Advantages: Centrifugal casting produces castings with fine grain structure and mechanical strength.
Centrifugal Casting Limitations Not especially suited to high carbon steelsRequires more expensive equipment and tooling than needed for static casting
Applications: Centrifugal casting is the preferred method for making high quality hollow components from almost any metal that can be cast. PipesRollsBearing BabbittGear blanksPulley sheavesImpellersValve bodies