Mold filling device for directional solidification of turbine blades and preparation method

The invention belongs to the field of investment casting directional solidification and particularly discloses a mold filling device for directional solidification of turbine blades and a preparation method. The structure comprises a spherical mold head wax mold and turbine blade wax molds. The turbine blade wax molds are evenly dispersed and assembled on the spherical mold head wax mold, so that after shell making is completed, outer parts of cavities of all the turbine blades are still completely separated. In the shell making process, the mold shell thickness is controlled, so that the inside of the cavity of each turbine blade forms the radial temperature gradient after pouring mold filling of molten metal, and metal crystals grow radially in a directional manner to form columnar crystals. 本发明属于熔模铸造定向凝固领域，特指种涡轮叶片定向凝固充型装置及制备方法。该结构包括球形模头蜡模、涡轮叶片蜡模。涡轮叶片蜡模在球形模头上均匀分散组装，使制壳完成后，各个涡轮叶片型腔外部仍保持完全分离。制壳过程中，通过控制模壳厚度，使每个涡轮叶片型腔内部在金属液浇注充型后形成沿径向的温度梯度，使金属晶体沿径向定向生长，形成柱状晶。