Abstract: A controller places the set of three-dimensional objects in the formation area. The controller sets a plurality of placement zones in the formation area. The placement zones are defined by borderlines extending along an extension direction of a recoater for leveling a liquid surface. The controller places the three-dimensional objects in descending order of height in the placement zones. The three-dimensional objects are placed in each of the placement zones in order from a first placement zone of the placement zones.

Abstract: The present invention provides a three-dimensional molding device which makes it possible to reduce molding time by decreasing the inkjet head waiting time during the molding step.

Abstract: The present invention is a three-dimensional modeled object including: a shaping material which is layered on a fabrication table; a modeled article which is formed inside the shaping material; and a support which is formed inside the shaping material and is formed with a predetermined gap with respect to the modeled article.

Abstract: A three-dimensional fabricating apparatus has a table on which a powder material is stacked in a layered manner, and a shaping unit which includes a powder material supply device supplying the powder material onto a top surface of the table by every predetermined layer thickness and a binder liquid supply device ejecting a binder liquid to the powder material supplied onto the top surface of the table. The powder material supply device of the shaping unit is movable in one direction in a state adjacent to the top surface of the table and is capable of supplying the powder material onto the top surface of the table at a predetermined supply width while moving the powder material supply device. The binder liquid supply device is capable of moving in the same direction as the powder material supply device in a state adjacent to the top surface of the table.

Abstract: The present invention provides a three-dimensional molding device which makes it possible to reduce molding time by decreasing the inkjet head waiting time during the molding step. A three-dimensional molding device for scattering and layering sand on a molding table (30) using a recoater (2), discharging a binder from a head (1) so as to coat the top of the scattered sand with the binder, on the basis of molding data, and creating a three-dimensionally molded. article by joining' the sand (S) using the binder, wherein: the recoater (2) is formed.

Abstract: A resin composition for optical stereolithography including a cation-polymerizable organic compound (A), a radical polymerizable organic compound (B), a cationic polymerization initiator (C) and a radical polymerization initiator (D), wherein the cationic polymerization initiator (C) is an aromatic sulfonium compound (C-1) represented by the following general formula (C-1): wherein R1, R2, and R3 represent a monovalent organic group, Rf represents a fluoroalkyl group, m is the same number as the cationic charge of the “cation [S+(R1)(R2)(R3)]”, and n is an integer in a range of 0 to 6. The resin composition also includes an aromatic thiol compound (E) represented by the following general formula (E): R4SH)p??(E) wherein, R4 represents a mono- or di-valent aromatic hydrocarbon which may optionally have a substituent, and p is an integer of 1 or 2.

Abstract: An optical three-dimensional shaped item excelling in the smoothness of molding end face. There is provided a three-dimensional shaped item composed of, superimposed one upon another, multiple cured resin layers having a given configurational pattern formed by irradiating with actinic energy rays a molding face consisting of an actinic energy ray curable resin composition, wherein at least part of an uneven region of molding end face of the three-dimensional shaped item, the degree of unevenness thereof is reduced to smoothness by segregation of a component contained in the actinic energy ray curable resin composition and/or a substance derived from the component. Also, there is provided an actinic energy ray curable resin composition for the three-dimensional shaped item.

Abstract: It is intended to provide the following resin composition for stereolithography which is superior in storage stability and aging stability during operation, shows no increase in viscosity upon prolonged storage, has a high light-curing sensitivity and, therefore, makes it possible to produce, upon photo irradiation, an object by stereolithography, which is superior in dimensional accuracy, fabricating accuracy, water resistance, moisture resistance and mechanical properties at a high fabricating speed and a high productivity.

Abstract: Provided is a resin composition for stereolithography that absorbs little water and moisture over time in uncured state, maintains a low moisture absorption rate even under high humidity, and has high curing sensitivity, from which a stereolithography product excellent in the properties, such as dimensional accuracy, mechanical properties, and dimensional stability can be smoothly produced for reduced light irradiation time. The resin composition for stereolithography comprising an oxetane compound expressed by the general formula (I) below: wherein R1 denotes an alkyl group having 1 to 5 carbon atoms, and R2 denotes an alkylene group having 2 to 10 carbon atoms that may contain an ether bond, in the proportion of from 3 to 60 mass % based on the total mass of the resin composition for stereolithography.

Abstract: A resin composition suited for rapid prototyping is provided comprising (I) an actinic energy radiation-curable silicone composition, (II) an actinic energy radiation-sensitive polymerization initiator, and (III) an actinic energy radiation absorber. The resin composition experiences little viscosity buildup and maintains fluidity during long-term storage at elevated temperature, and is effective in rapid prototyping or shaping by stereolithography using any actinic energy radiation.

Abstract: The invention provides a resin composition for stereolithography, which is low in absorption of water and moisture even when the composition is preserved for a long time, which is capable of maintaining high curing sensitivity for long, which is capable of fabricating a three-dimensional object in a shortened molding time, smoothly and in high productivity, the three-dimensional object being excellent in molding accuracy, dimensional accuracy, water resistance, moisture resistance, and mechanical characteristics.

Abstract: An optical three-dimensional shaped item excelling in the smoothness of molding end face. There is provided a three-dimensional shaped item composed of, superimposed one upon another, multiple cured resin layers having a given configurational pattern formed by irradiating with actinic energy rays a molding face consisting of an actinic energy ray curable resin composition, wherein at at least part of an uneven region of molding end face of the three-dimensional shaped item, the degree of unevenness thereof is reduced to smoothness by segregation of a component contained in the actinic energy ray curable resin composition and/or a substance derived from the component. Also, there is provided an actinic energy ray curable resin composition for the three-dimensional shaped item.

Abstract: Provided is a resin composition for stereolithography that absorbs little water and moisture over time in uncured state, maintains a low moisture absorption rate even under high humidity, and has high curing sensitivity, from which a stereolithography product excellent in the properties, such as dimensional accuracy, mechanical properties, and dimensional stability can be smoothly produced for reduced light irradiation time. The resin composition for stereolithography comprising an oxetane compound expressed by the general formula (I) below; (wherein R1 denotes an alkyl group having 1 to 5 carbon atoms, and R2 denotes an alkylene group having 2 to 10 carbon atoms that may contain an ether bond) in the proportion of from 3 to 60 mass % based on the total mass of the resin composition for stereolithography.

Abstract: It is intended to provide an optical three-dimensional object as will be described below which has a high impact resistance and is superior in dimensional accuracy, mechanical properties such as tensile strength, and other properties such as water resistance, moisture resistance and heat resistance, and a method of producing the same.

Abstract: A photo-solidification modeling apparatus and a photo-solidification modeling method, wherein the reliability of an operation for coating the upper surface of a solidified layer with an unsolidified liquid is improved and the time required to carry out the same operation is reduced. To meet the purpose, a clearance is formed between the lower surface of a recoater travelling on a solidified layer and the upper surface of the solidified layer. When this condition is satisfied, an unsolidified liquid is introduced onto the solidified layer by virtue of both the force of the lower surface of the recoater which drags the unsolidified liquid and the nature of the unsolidified liquid entering the clearance. When recesses are provided in the lower surface of the recoater, the liquid adsorbed to the surfaces of the recesses is also introduced onto the unsolidified layer.

Abstract: A superficial model with an inner reinforcing structure having communication ports formed for communication among cells defined by ribs constructing a honeycomb structure. For this purpose, a process of temporarily stopping light exposure is added in a light exposure process for modeling ribs. Alternatively, a process of offsetting phases of ribs is added in the light exposure process for modeling ribs.