Cast manufacturing method of rapid sand casting based on SLA prototype

The invention discloses a cast manufacturing method of a rapid sand casting based on an SLA prototype, which combines the SLA rapid prototyping technology based on a conventional cast manufacturing method. The method comprises the following steps: in a whole cast design, exploiting a cast technology CAD system software as a main auxiliary application tool, and conducting cast simulating and technology optimization through a technology CAE system; and after finishing the cast design, manufacturing an SLA prototype piece through a light curing model mechanism, forming the cast by the modeling and the assembling of the cast, and manufacturing metal products by pouring. Meanwhile, by modifying the linear shrinkage and the draft angle of the cast, and adopting technical ways of phenol-urethane resin bonded sand molding, and the like, the efficiency and the accuracy of design and manufacturing of a casting technology designer are improved; manpower and material resources are saved; the engineering time is shortened, so as to facilitate the popularization and application of the rapid casting technology.