MOLDING SAND SPRAYING AND CURING ADDITIVE MANUFACTURING METHOD

摘要

A molding sand spraying and curing additive manufacturing method comprises: designing a three-dimensional CAD model of a casting mould according to a structure of the casting mould, obtaining layered cross-section profile data and layered scan paths according to model data, obtaining information of different original sand materials and cold iron materials through analysis, and finally obtaining layer surface detailed information of each layer and determining control information; selecting a sprayer according to current layer surface information and performing accurate spraying of molding sand or cold iron materials with different materials and meshes along a current layer scan path, while using spraying apparatuses to accurately spray a bonding agent and a curing agent on each layer of molding sand; after spraying of a layer is complete, moving a layer height until the required casting mould is obtained. The casting mould obtained according to the method has high self-adaptability and good air permeability, and a casting obtained later has good mechanical performance and service performance.