Dewaxing, sand-blowing and cooling device for investment pattern precision casting

The utility model discloses a dewaxing, sand-blowing and cooling device for investment pattern precision casting. The device comprises a cavity mold and a plug, wherein the upper ends of the cavity mold and the plug are respectively provided with turnups; the plug is a cone of which the top is large and the bottom is small; and an inner cavity of the cavity mold is a conical cavity which is matched with the plug and is large in top and small in bottom. The device disclosed by the utility model is simple in structure, and three effects of guaranteeing smooth dewaxing so as to prevent the shell from cracking, removing the residual ash in the shell and the cavity after roasting and sequentially solidifying the castings along the sprue direction can be achieved.