The Voxeljet printer would be able to do the cores I'd imagine. Someone has to still do the CAD. Not sure at what point (I mean quantity) that making the patterns would be more economical. The cost per item doesn't change with 3D printing the sand cores, so you may find doing it 3 or 4 heads, you may be better off making patterns. I have been meaning to look in to it for myself for some transmission cases.