The invention relates to the field of precise
casting and particularly relates to a
light curing 3D printing preparing method for a complex double-wall
silicon-based
ceramic core for
investment casting. The method comprises the steps that firstly,
silicon-based
ceramic core paste with high
solid content, high printing performance and more stable and more excellent flow
settling performance is prepared; secondly, a three-dimensional model of the complex double-wall
silicon-based
ceramic core is obtained according to a
single crystal hollow double-wall engine blade needing to be obtained, and the core three-dimensional model is subjected to
slicing treatment and
light curing 3D printing path
programming; thirdly, an
STL file of the core is imported into a
light curing 3D printer, printing iscarried out layer by layer in combination with the silicon-based ceramic core paste prepared in the first step, and a light cured double-wall core biscuit is obtained; and fourthly, the core biscuitis subjected to
drying and
sintering processes, and the light cured 3D printed complex double-wall silicon-based ceramic core is obtained. The complex double-wall silicon-based ceramic core is used for precise
casting of the hollow engine blade and replaces a double-wall core which is complex in working procedure and needs to be manufactured through multiple dies in traditional
investment casting.