Stacking box structure for casting bimetal composite brake disc

The invention discloses a stack box structure for casting a bimetal composite brake disc. The stack box structure comprises a stack box body, the stacking box body at least comprises three casting molds, and the three casting molds are sequentially stacked from bottom to top. The first casting mold comprises a first ventilation disc core and a bottom plate core, and the first casting mold is provided with a first cavity used for forming a brake disc casting; the second casting mold comprises a second ventilation disc core and is provided with a second cavity used for forming a brake disc casting. The third casting mold comprises a third ventilation disc core and a third cover plate core, the third casting mold is provided with a third cavity used for forming a brake disc casting, a pouring cup is arranged on the third cover plate core, and the pouring cup communicates with the third cavity; and the first cavity, the second cavity and the third cavity are communicated with one another through a pouring channel