PRODUCTION METHOD OF THREE-DIMENSIONAL MOLDED ARTICLE AND THREE-DIMENSIONAL MOLDED ARTICLE BY THE METHOD

• Main Authors: AMAYA KOICHI, MIDORIKAWA TETSUSHI, TOMITA SEIICHI, TANAKA RYUZO
• Format: Patent
• Language: English; Japanese
• Published: 13.12.2021
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING METALLIC POWDER; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide a three-dimensional molded article in which a lattice area formed by a uniform shape and strong coupling, and an external frame area provided in a whole periphery of the lattice area are objects, and a production method thereof.SOLUTION: There is provided a production method of a three-dimensional molded article based on repeating of a step of molding a powder layer 3 and a step of sintering by laser beam or electron beam. In a lattice area 1, the beam having a prescribed spot diameter is scanned multiple times in one side direction at a prescribed interval for molding a sintered layer 41, and then, similar scanning is performed in the other side direction crossing the one side direction for molding a sintered layer 42. In an external frame area 2, the beam having a prescribed spot diameter is scanned in a whole area of the lattice area 1 being surrounded by an inside line and an outside line, for molding a continuous sintered layer 43. There is also provided a three-dimensional molded article based on the method.SELECTED DRAWING: Figure 1 【課題】均一な形状及び強固な結合によるラティス領域及び当該ラティス領域の全周囲に配置されている外枠領域を対象とする三次元造形物及びその製造方法に関する構成を提供すること。【解決手段】粉末層３の成形及びレーザビーム又は電子ビームによる焼結という工程の繰り返しに基づく三次元造形物の製造方法であって、ラティス領域１においては、所定のスポット径を有する前記ビームを所定の間隔にて一方側方向に複数回走査することによって焼結層４１を成形した後に、改めて前記一方側方向と交差する他方側方向にて同様の走査を行うことによって焼結層４２を成形し、外枠領域２においては、内側ライン及び外側ラインによって囲まれているラティス領域１の全領域にて所定のスポット径を有する前記ビームを走査することによって連続した焼結層４３を成形することによって前記課題を達成し得る三次元造形物の製造方法、及び当該方法に基づく三次元造形物。【選択図】図１