MANUFACTURING METHOD OF THREE-DIMENSIONAL OBJECT

摘要

PURPOSE: A manufacturing method of a three-dimensional object is provided to easily manufacture an object of high strength and high accuracy if the shape is complex. CONSTITUTION: A manufacturing method of a three-dimensional object includes steps of filling powdered material around a core(3) to form a powdered material layer(1)(a), selectively irradiating beam to the powdered material layer to form a hardened layer(2) coupled to the core(b), and repeating the steps of (a) and (b) to form many hardened layers around the core and manufacturing a three-dimensional object having the core built in. The core includes many sheet materials combined and piled before the steps of (a) and (b) and the sheet materials are organic or inorganic materials. The three-dimensional object is manufactured by filling powdered material around the core and hardening.