Three-dimensional object manufacturing method, three-dimensional object, and shaping device

A three-dimensional object manufacturing method for manufacturing a three-dimensional object by ejecting a shaping material in a liquid state and then solidifying the ejected shaping material, the method comprising:

• an interior forming process of forming a portion of an interior of the three-dimensional object with a reinforcement material other than the shaping material;
• and
• a periphery forming process of forming a portion of a periphery of the portion of the interior by stacking a plurality of layers by the shaping material, wherein
• the reinforcement material has a larger rigidity compared to the shaping material in a solid state,
• wherein the periphery forming process is a process in which a direction orthogonal to an extending direction of the plurality of layers disposed by layering is a vertical direction,
• wherein the reinforcement material has a planar shape extending in the extending direction of the plurality of layers and is disposed in plural positions in the vertical direction;
• the three-dimensional object has a space formed at one part of an area on a lower side of each of the reinforcement material in the vertical direction in the periphery forming process,
• the portion of the periphery includes a supporting portion that supports the reinforcement material on the lower side of the reinforcement material in the vertical direction in the periphery forming process and that configures one part of a boundary of the space.

A three-dimensional object manufacturing method for manufacturing a three-dimensional object by ejecting a shaping material in a liquid state and then solidifying the ejected shaping material, the method comprising:

• an interior forming process of forming a portion of an interior of the three-dimensional object by the shaping material;
• and
• a periphery forming process of forming a portion of a periphery of the portion of the interior by stacking a plurality of layers by the shaping material, wherein
• the shaping material for forming the portion of the interior in the interior forming process has a larger rigidity in a solid state compared to the shaping material for forming the portion of the periphery in the periphery forming process,
• the periphery forming process is a process of forming a groove configuring at least one part of the portion of the periphery, wherein the groove is formed by stacking the plurality of layers by the shaping material in a vertical direction orthogonal to an extending direction of the plurality of layers, and
• the interior forming process is a process of forming the portion of the interior, after the groove is formed, by placing the shaping material in the liquid state in the groove formed by stacking of the plurality of layers after all the portions of the periphery of the three-dimensional object are formed in the periphery forming process,
• wherein the interior forming process and the periphery forming process are processes of ejecting the shaping material in the liquid state through an inkjet method,
• wherein the three dimensional object includes a first part and a second part that is narrower than the first part,
• wherein the second part that is narrower than the first part is formed by the interior forming process and the periphery forming process.