METHOD FOR MANUFACTURING THREE-DIMENSIONAL SHAPED OBJECT

To provide a method for manufacturing a large and dense metal three-dimensional shaped object.SOLUTION: A three-dimensional shaped object manufacturing method that manufactures a three-dimensional shaped object by laminating layers L includes: a first metal powder supplying step of supplying a first metal powder having a first average particle diameter to a shaping table 9; a layer forming step of forming the layers L by compressing the first metal powder supplied to the shaping table 9; a first liquid supplying step of supplying a first liquid I1 containing a second metal powder having a second average particle diameter and a binder to a part of a configuration region R of a three-dimensional shaped object; a second liquid supplying step of supplying to at least a part of a surface layer region Re a second liquid I2 containing a second metal powder in a lower concentration than that of the first liquid I1 or a third metal powder having an average particle diameter larger than the second average particle diameter, and at least one binder thereof; and a sintering step of heating a laminate S to sinter the metal in the configuration region R.SELECTED DRAWING: Figure 1 【課題】大型で高密度の金属製三次元造形物の製造方法の提供。【解決手段】層Ｌを積層して三次元造形物を製造する三次元造形物の製造方法であって、第１平均粒子径の第１金属粉末を造形テーブル９に供給する第１金属粉末供給工程と、造形テーブル９に供給された第１金属粉末を圧縮して層Ｌを形成する層形成工程と、第２平均粒子径の第２金属粉末とバインダーとを含む第１液体Ｉ１を、三次元造形物の構成領域Ｒの一部に供給する第１液体供給工程と、第１液体Ｉ１よりも低い濃度で第２金属粉末を含むか、第２平均粒子径よりも大きい平均粒子径の第３金属粉末を含むか、の少なくともいずれかのバインダーを含む第２液体Ｉ２を、表層領域Ｒｅの少なくとも一部に供給する第２液体供給工程と、積層体Ｓを加熱して構成領域Ｒにおける金属を焼結する焼結工程と、を有する三次元造形物の製造方法。【選択図】図１