Investment Casting

Metal casting is the most appropriate forming method for this component, because of the complexity and thin wall configuration of the part. No other forming method (forging, assembly, welding, etc) could meet the shape and tolerance requirements without extensive machining and extra cost.

In considering the complexity, physical size, tolerance requirements, cost targets, and limited production quantity for the crossbleed valve, investment casting was the molding process of choice.

The investment casting process-

Wax Patterns Being Dipped in the Slurry (From MK-Technology.com)

Uses a shell mold formed by coating a wax pattern with a ceramic slurry.
Provides exceptionally fine detail and excellent dimensional tolerance.