METHOD FOR PRODUCING A MODEL FORM CORE BLANK, A MODEL FORM CORE AND AN INVESTMENT CASTING MOLDS AND A CASTING METHOD FOR PRODUCING A CAST PIECE WITH A HOLLOW STRUCTURE

摘要

The invention relates to a manufacturing method of a model core blank (1), in which a ceramic blank (10) is fixed to a machining holder (50). A lost core (12) is produced from the ceramic blank (10) based on a 3D model in a CNC manufacturing process while the fixation continues, the machining holder (50) being fixed in the CNC machine that is carrying out the process. A model blank (20) is then produced by casting model material around the lost core (12) while the fixation continues. A method according to the invention for producing a model mold core (2) is based on this, in which a production of an outer contour (22) of a lost model (21) and / or on the model blank (20) based on the 3D model in a second CNC Manufacturing process takes place, the fixation continues in the meantime, and wherein the machining holder (50) is fixed in the CNC machine performing. The subject matter of the invention also includes a process for producing an investment casting mold (80), in which a ceramic mold (81) is applied to the outer contour (22) of the lost model (21), and a casting process in which a casting (100) is produced with a cavity structure (101) with the investment casting mold (80).