The invention relates to the technical field of
casting forming, in particular to a forming method for a circular narrow-channel
casting. The annular
narrow channel casting forming method comprises the following steps that S1, a plurality of split mold cores are put into a
wax mold, and after positioning
wax pressing and cooling shaping are conducted in sequence, a
wax piece A is obtained; wherein the split mold core comprises a
ceramic mold core, a fixed end, a free end and a soluble mold core; the fixed end is located at one end of the
ceramic core, the free end is located at the other end of the
ceramic core, and the ceramic core and the soluble core are connected through the free end; a wax layer is arranged on the surface of the free end; s2, a soluble and lost mold core in the wax piece A is removed, and a wax piece B is obtained; s3, the wax piece B is sequentially subjected to
slurry spraying, sand hanging and steam dewaxing, and a mold shell is obtained; s4,
molten metal is poured into the mold shell, after cooling, the mold shell, the fixed end and the free end are removed, the ceramic mold core is removed, and after
sand blasting, an annular narrow-channel casting is obtained; the method improves the qualification rate of castings.