Abstract: A production method of a three-dimensionally shaped object, includes a first layer forming step of forming a first layer by using a first composition containing first powder and binder, a second layer forming step of forming a second layer by using a second composition containing second powder, third powder, and binder, and a sintering step of sintering the first powder and the second powder. In a case where the first powder and the second powder are of the same material, difference in a contraction rate between the first layer and the second layer in the sintering step is reduced by matching a filling rate of the first powder in the first composition with a total filling rate of the second powder and the third powder in the second composition and matching an average particle diameter of the first powder with an average particle diameter of the second powder.

Abstract: Provided is a method which includes a first layer formation step of forming a first layer by using a first composition that contains a constituent material powder, a first powder, and a binder of a three-dimensional shaped article; a second layer formation step of forming a second layer by using a second composition that contains a second powder and a binder; a degreasing step of a stack containing the first layer and the second layer; and a sintering step of the stack, a decomposition point of the first powder is higher than decomposition points of the binder of the first layer and the binder of the second layer, a decomposition point of the second powder is higher than the decomposition point of the first powder, and a sintering temperature of the constituent material powder is higher than the decomposition point of the second powder.

Abstract: A three-dimensional shaped article manufacturing apparatus is an apparatus for manufacturing a three-dimensional shaped article by laminating layers formed by discharging and curing inks including a curable resin.

Abstract: A three-dimensional modeling apparatus is provided with a head unit for modeling an object by discharging a liquid into each unit grille that is defined in accordance with modeling resolutions of a cross section body in an X direction and a Y direction and a lamination interval in a Z direction, and a control unit for controlling the head unit. In the case where one or more types of the chromatic liquids are discharged into the unit grille by controlling the head unit and the spatial volume of the unit grille is not filled with the one or more types of chromatic liquids, the control unit causes the achromatic liquid to be discharged into the unit grille in addition to the one or more types of chromatic liquids so as to fill the spatial volume of the unit grille with both the chromatic liquids and the achromatic liquid.

Abstract: A three-dimensional shaped article manufacturing apparatus is an apparatus for manufacturing a three-dimensional shaped article by laminating layers formed by discharging and curing inks including a curable resin. The apparatus comprises: a first discharge unit configured to discharge a substantive section-forming ink to a region that forms the three-dimensional shaped article; a second discharge unit configured to discharge a sacrificial layer-forming ink for forming a sacrificial layer to a region that is adjacent to a region that forms an outermost layer of the three-dimensional shaped article and on a surface side of the outermost layer; and a curing unit configured to cure the substantive section-forming ink and the sacrificial layer-forming ink. A viscoelasticity of the sacrificial layer-forming ink during curing of the substantive section-forming ink being not less than a viscoelasticity of the substantive section-forming ink during curing of the substantive section-forming ink.

Abstract: A spool 220 is provided with a second land section 224 that blocks a portion between the spool 220 and the valve sleeve 210 at a position between the output port P21 and the lead-in port P22 when the spool 220 is located in a position for connecting the channel for input T1 and the channel for output T2 via the input port P10 and the output port P21 and blocking a channel leading from the channel for output T2 to the channel for discharge T3, and when the spool 220 is located in a position for connecting the channel for output T2 and the channel for discharge T3 via the lead-in port P22 and the discharge port P30 and blocking a channel leading from the channel for input T1 to the channel for output T2.

Abstract: Provided is an apparatus for producing a three-dimensional shaped article in which the three-dimensional shaped article is produced by stacking layers, the apparatus including: an ejecting section capable of ejecting a flowable material that contains a powder, a solvent, and a binder which constitute the three-dimensional shaped article, based on data; a heating section for heating the flowable material ejected from the ejecting section; and a controlling section for controlling the ejecting section and the heating section, in which the controlling section divides data of the layer for one layer of the three-dimensional shaped article, out of the data, into a plurality of divided pieces of data, and alternately repeats ejection of the flowable material from the ejecting section and heating by the heating section, based on the divided pieces of data, to form the layer for one layer of the three-dimensional shaped article.

Abstract: Provided is a method for producing a three-dimensional shaped article in which the three-dimensional shaped article is produced by stacking a plurality of layers, and the method includes a layer formation step of forming layers by using a composition that contains a powder, a solvent, and a binder which constitute the three-dimensional shaped article, a solvent removal step of removing the solvent contained in the layers, a thermal treatment step of applying heat at a temperature equal to or higher than a glass transition temperature of the binder to the layers obtained by performing the layer formation step and the solvent removal step, and a heating step of carrying out at least one of degreasing and sintering with respect to a stack of the three-dimensional shaped article that has been thermally treated in the thermal treatment step.

Abstract: In the method for manufacturing a three-dimensional structure of the invention, an ink for forming an entity portion is applied to a region where the three-dimensional structure is configured, and an ink for forming a sacrificial layer is applied to a region on a surface side of an outermost layer which is adjacent to a region to become the outermost. As the ink for forming a sacrificial layer, a first ink for forming a sacrificial layer and a second ink for forming a sacrificial layer are used. At the time of curing the ink for forming an entity portion, the viscoelasticity of the first ink is smaller than that of the ink for forming an entity portion, and at the time of curing the ink for forming an entity portion, the viscoelasticity of the second ink is greater than that of the ink for forming an entity portion.

Abstract: A three-dimensional modeling apparatus is provided with a head unit for modeling an object by discharging a liquid into each unit grille that is defined in accordance with modeling resolutions of a cross section body in X and Y directions and a lamination interval in a Z direction, and a control unit for controlling the head unit. The unit grille has a plurality of sub unit grilles aligned in the Z direction. In the case where a designated amount of one of the plurality of types of chromatic liquids is discharged into each of the sub unit grilles by controlling the head unit and the spatial volume of the sub unit grille is not filled, the control unit causes the achromatic liquid to be discharged into the sub unit grille in addition to the chromatic liquid so as to fill the spatial volume of the unit grille.

Abstract: There is provided a paste for use in producing a three-dimensional shaped article, the paste containing a solvent, a binder that is soluble in the solvent, support layer forming first particles, and a material having a decomposition temperature lower than a sintering temperature of the support layer forming first particles, in which the material is contained in a volume of greater than or equal to 20% and less than or equal to 60% with respect to a total volume of the support layer forming first particles and the material being 100%. By using such a paste, a highly accurate three-dimensional shaped article can be produced.

Abstract: A three-dimensional modeled-object manufacturing composition used for forming a layer in a method of manufacturing a three-dimensional modeled-object in which the layer is formed using a discharge method and a plurality of the layers is laminated, the composition includes a plurality of particles and a solvent dispersing the particles. In the composition, a viscosity ?1 at a shear rate of 10 s?1 at 25° C. is 6,000 mPa·s or higher and a viscosity ?2 at the shear rate of 1,000 s?1 at 25° C. is 5,000 mPa·s or lower.

Abstract: A three-dimensional modeled-object manufacturing composition used for forming a layer of a three-dimensional modeled-object in which a plurality of the layers is laminated, using a discharge method, the composition includes: a plurality of particles; a solvent dispersing the particles; and a binder having a function of temporarily binding the particles in a state where the solvent is removed. In the composition, a viscosity ?1 at a shear rate of 10 s?1 at 25° C. is 6,000 mPa·s or higher, a viscosity ?2 at the shear rate of 1,000 s?1 at 25° C. is 5,000 mPa·s or lower, and when a binder removal treatment is carried out by heating the composition at 400° C. for five hours in nitrogen gas, a residual carbon ratio is 0.04 mass % to 0.3 mass %.

Abstract: An apparatus for producing a three-dimensional structure that produces a three-dimensional structure by laminating layers to each other using a paste-like composition containing grains includes a stage for which the composition is provided and on which the layer is formed; and a dispenser that directly supplies the composition to a forming area on the stage.

Abstract: Provided is a three-dimensional structure manufacturing apparatus which manufactures a three-dimensional structure by laminating layers formed using three-dimensional formation compositions containing three-dimensional formation powders, the apparatus including: a formation unit in which the three-dimensional structure is formed; a first supply unit and a second supply unit which supply the three-dimensional formation compositions to the formation unit; a first squeegee and a second squeegee which form the layers configured with the three-dimensional formation compositions on the formation unit; and a discharge unit which discharges a binding solution for binding the three-dimensional formation compositions to the layer, in which the first supply unit, the first squeegee, the discharge unit, the second squeegee, and the second supply unit are arranged in this order, along a movement direction of the discharge unit.

Abstract: A three-dimensional shaped-article manufacturing composition of the invention is a three-dimensional shaped-article manufacturing composition which is used for manufacturing of a three-dimensional shaped article. The composition described above includes a plurality of shaped-article forming grains forming a substantive portion of the three-dimensional shaped article; a void forming material forming voids in the three-dimensional shaped article; a solvent dispersing the shaped-article forming grains and the void forming material; and a binder dissolved in the solvent. The content of the void forming material is 5 to 50 parts by volume with respect to 100 parts by volume of the shaped-article forming grains.

Abstract: A fluid material ejecting apparatus includes a material chamber to which a fluid material containing at least one of metal particles and ceramic particles is supplied, a valve seat constituting a part of the material chamber and including an ejection port, a piston movable in the material chamber in directions toward and away from the ejection port, and a driver of the piston. The driver is configured to cause the piston to contact the valve seat from a position away from the valve seat and move in the direction toward the ejection port so as to slide along the valve seat, to thereby eject the fluid material through the ejection port. Sliding surfaces of the piston and the valve seat via which the piston and the valve seat contact each other have a higher Vickers hardness than the particles contained in the fluid material.

Abstract: A three-dimensional modeling apparatus includes an ejection portion capable of ejecting a fluid material, which is a material of an object, and a control portion that forms a laminated body in which one layer or more of cross-section bodies are laminated by executing one or more repetitions of a cross-section body formation process, which forms a cross-section body equivalent to one layer of the object by controlling the ejection portion and ejecting the fluid material. The control portion executes a correction process that ejects the fluid material onto a target correction location, which is at least a portion of an outline section of an upper surface of the laminated body.

Abstract: A three-dimensional modeling apparatus includes an ejection portion capable of ejecting a fluid material, and a control portion that forms a laminated body in which one layer or more of cross-section bodies are laminated by executing one or more repetitions of a cross-section body formation process. The control portion reduces a total amount of the fluid material to be ejected at a first coordinate, which configures the apex that corresponds to the recess, to be lower than a total amount of the fluid material to be ejected at a second coordinate, which configures a region other than an outline section of the planar shape in a case in which an apex, which corresponds to a recess in a planar shape when the laminated body is viewed from above in a planar manner, is present.

Abstract: A three-dimensional modeling apparatus includes a modeling portion that models a three-dimensional object by laminating material layers formed by a material having a fluid property, and executes a first modeling process that forms concave portions, which are adjacent to two or more convex portions and are recessed in comparison with the convex portions in a lamination direction in which material layers are laminated, as a result of forming a plurality of convex portions that project in the lamination direction, a second modeling process that laminates a material layer on the convex portions, and forms a material layer, which is spatially separated from the material layer laminated on the convex portions, inside the concave portions, and a third modeling process that fills the concave portions with a material layer by disposing the material on the material layer inside the concave portions.