process for the production of a turbinenschaufel

摘要

Process for producing a turbine blade in a hollow profile comprises connecting a first core element (10) via a number of approximately cylindrical spacers (14) to a further core element and/or a casting mold. The hollow spaces left by the core elements in the casting mold are filled with blade material. The openings produced in the blade by the spacers are sealed by stopper elements after removal of the core elements and the spacers. Preferred Features: The stopper elements are flattened and mushroomed over after insertion and welded in the opening. The stopper elements are blind rivets or drive-in pins.