Iron casting
I had a course in school for molding and casting, so I know the basics, like the difference between investment and sand casting. Now I have some old cast iron train parts I want to reproduce. All less than a pound, maybe up to 4” in the largest dimension.
I’m thinking that I’m going to scan them with my phone and import that into my CAD system, create some models that I can 3d print, then cast them. This is where I get lost…. I suppose I could investment cast them at this point by using a burnout grade PLA and apply the proper shrinkage factors. Or I could grow some nice solid parts to use as patterns and cores for sand casting. I suppose I could make my own casting box (cope and drag).
For the experts here, how would you approach this? I have a little knowledge, a good budget, and a willingness and ability to learn.