High-precision mould assembling device for casting

The invention discloses a high-precision mould assembling device for casting, and relates to the field of sand mould casting. The high-precision mould assembling device comprises an upper moulding boxand a lower moulding box. Upper mould assembling sleeves are arranged at the four corners of the upper moulding box and are each in a sector shape, and the circle centers of the upper mould assembling sleeves are overlapped with the vertexes of the four corners of the upper moulding box. Lower mould assembling sleeves are arranged at the four corners of the lower moulding box and are each in a sector shape, and the circle centers of the lower mould assembling sleeves are overlapped with the vertexes of the four corners of the lower moulding box. A hemispherical cavity is formed in the lower end face of each upper mould assembling sleeve, the upper end of each cavity is closed, an opening is formed in the lower end of each cavity, and two elastic protrusions are arranged on each opening. Hemispherical locating columns matched with the cavities are arranged on the upper end faces of the lower mould assembling sleeves, and two grooves matched with the corresponding elastic protrusions are formed in each locating column. In the high-precision mould assembling device, the mould assembling device can be located accurately, and reliability is high; the structure and operation are simple,use is convenient, and cost is low; and a certain guiding and locating function is achieved, and the process that when locating is inaccurate, the position is adjusted to achieve accurate locating isfacilitated.