The most common method of manufacturing bushings is centrifugal casting. This method allows the production of high-quality products with improved mechanical properties and high density. In addition, such bushings have a low cost.
The sleeve centrifugal casting method consists in filling the mold with a copper alloy and subsequent hardening of the product under the influence of centrifugal forces, which significantly exceed the force of gravity.
During the technological process, solid metal particles touching the walls of the mold are pressed against it and stop floating. The centrifugal casting method is one of the most common casting methods. Most often, the method is used for the production of hollow castings. First, the mold is filled with molten copper alloy, which rotates, and then centrifugal force is applied to it. The centrifugal casting production process is carried out on centrifugal casting machines. The shape of the sleeve causes rotation around an inclined axis, either horizontal or vertical.
Copper bushings formed by centrifugal casting are characterized by:
- high density;
- no shells in the metal;
- no foreign inclusions in the metal of the sleeve.