Hanging mold pouring opening setting method, pouring device and vertical surface pattern pouring method

The invention provides a hanging mold pouring opening setting method, a pouring device and a vertical surface pattern pouring method. A hanging mold of the pouring device is used for carrying out filler pouring on a groove forming a pattern on the vertical surface of a prefabricated part, and the groove comprises a plurality of independent sub-patterns. The hanging mold pouring opening setting method comprises a groove outline splitting step and a pouring opening number and position design step. A plurality of vertical outlines, transverse outlines and curve outlines are split from the outlines of the sub-patterns according to the shapes of the sub-patterns; and according to the minimum width w1 and the length l1 of the vertical outlines, according to the length l2 of the transverse outlines, and according to the minimum width w3 and the minimum curvature radius r of the curve outlines, the positions and the number of pouring openings for the outlines are determined respectively. The pouring device comprises