Product3D Sand Printing ProcessSand Core Casting ProcedurePrinting ProcessProduct Sand Die and Casting Part Sand Die and Casting Part Complicated Inner Channel Complicated Sand Core 3D Sand Printing Process Sand Casting Procedure Sand Core Casting Procedure Sand Core Casting Procedure Design core and casting head based on CAD file SLS printing Clean accessory structure Strengthening treatment Surface treatment Metal casting Printing Process Slicing 3D Region Growth