Centrifugal Casting

What Type of Parts are Good Candidates for Centrifugal Casting?

Centrifugal casting (which can also called "rotocasting") is a casting technique usually used to cast cylinders with thin walls.  The way it works is that molten metal is poured into a cylindrical form that is moving at 300 to 3000 RPM.  Centrifugal force causes the metal to become evenly distributed along the walls of the mold.  The metal is then cooled from the outside to the inside.  Because of this, any imperfections show up in the center of the cylinder.  These imperfections can easily be machined away.  Materials that can be used in this process include glass, steel, iron, stainless steels, and alloys of copper, aluminum and nickel.  This makes the process very versatile for different types of cylinders used in different industries.  Centrifugal Casting Companies can also use two materials in the process by introducing a second material during the process.

Designing Parts for Centrifugal Casting

When designing parts, Centrifugal Casting Companies need to keep several elements in mind. While castings can be any diameter or length, they must be cylindrical.  While this can be limiting, a positive aspect is that the same mold can be used to produce different wall diameters.  Centrifugal Casting Companies will not need cores, because centrifugal force is used to throw the molten metal on the insides of the mold's wall.  The castings made with the centrifugal process are resistant to corrosion found in the atmosphere, which makes this process ideal for making pipes.

Sourcing Centrifugal Casting

Centrifugal casting has some significant advantages.  Because the process is simple compared to others, it is a good match for mechanization.  The sand that is used in the process can be used over and over, which is good for the environment.  Centrifugal Casting Companies are also greener because the process produces less waste.  Centrifugal casting is also less likely to produce defects.  Centrifugal casting sometimes produces banding, possibly due to vibration.  Many companies provide centrifugal castings for customers with varying specifications.  There are, however, size limits for this process. Centrifugal casting cannot be used to create cylinders with a radius larger than 5 feet or 1.5 meters (10 feet or 3 meters in diameter).  Centrifugal casting also cannot be used for cylinders longer than 50 feet or 15 meters.