Investment casting is well suited for your project if the part has any or all of the following characteristics:
Tool and die making is literally designing and building a “negative” imprint of the cast part while holding very close net tolerances. The tool is reusable (a one-time investment) and often capable of lasting the lifetime of the part. Wax injection does not cause wear and tear on the mold.
This is in order to qualify the tooling. In other words, to guarantee the resulting part is both dimensionally and geometrically correct.
Skipping the samples and first article process is not recommended. Financial responsibility for parts produced as a product of the tool (good or bad) falls to the customer.
A weldment is a part consisting of sections welded together to create a final component. While often very labor intensive, a large portion of the part’s quality is only as good as the welder. On the other hand, investment casting can manufacture the part in a single process (without welding), which reduces labor hours and costs.