Investment casting vs. sand casting of aluminum

Hi, any chance you will let us know how it worked out?

I am looking to investment cast a part myself and am wondering what the restrictions are for the wax master pattern.

  • Can it be designed like any injection molded polymer or are there specific requirements (wall thickness, draft, sliders, split mold etc.)
  • Can threads be achieved with good tolerances, are there any tricks do achieve that? Because the standard tolerance mentioned for a cap nearing 2" diameter is +/- 0.35mm and that is far too much.