Abstract: A resin powder for three-dimensional molding includes ethylene-propylene copolymer particles. The volume average particle size of the ethylene-propylene copolymer particles is within a range of 5 to 200 ?m. The ethylene content molar ratio (ethylene/(ethylene+propylene)) in the ethylene-propylene copolymer particles is within a range of 0.001 to 0.04. The melt flow rate (MFR) is within a range of 3 to 40 g/10 min at 230° C.

Abstract: A course control device includes: an information acquisition unit to acquire information via any of wireless devices arranged along a track from a first station to a second station; and a course control unit to control the course of a course control target train based on the information acquired by the information acquisition unit. The course control unit prevents the course control target train from proceeding to the course in at least one of a case where at least one of the wireless devices is in a failure state, a case where an on-board device that is mounted in a preceding train preceding the course control target train on the track and controls the preceding train based on information acquired via the wireless devices is in a failure state, and a case where the preceding train is in a stationary state between the first station and the second station.

Abstract: Provided are a powder bed fusion model having improved model strength and a method of fabricating the same.

Abstract: Provided is a powder bed fusion apparatus that further reduces the difference in temperature between a powder material at a peripheral region in a fabrication container and a powder material at a center region in the fabrication container during preheating. The powder bed fusion apparatus comprises: a container that has a quadrangular shape as viewed from above and has an opening in an upper surface; a table which is disposed in the opening of the container and onto which a powder material is supplied through the upper surface; and a plurality of heaters that are attached to each of corner portions of sides of the container to heat the powder material on the table through the corner portions.

Abstract: A course control device includes: an information acquisition unit to acquire information via any of wireless devices arranged along a track from a first station to a second station; and a course control unit to control the course of a course control target train based on the information acquired by the information acquisition unit. The course control unit prevents the course control target train from proceeding to the course in at least one of a case where at least one of the wireless devices is in a failure state, a case where an on-board device that is mounted in a preceding train preceding the course control target train on the track and controls the preceding train based on information acquired via the wireless devices is in a failure state, and a case where the preceding train is in a stationary state between the first station and the second station.

Abstract: When it is determined that a control-target train has an impact on a third train that is other than a train that is determined to affect the control-target train, a ground running control unit of a train-running management device further changes a running pattern and instructs the control-target train to take less time to completely leave a departure station.

Abstract: When it is determined that a control-target train has an impact on a third train that is other than a train that is determined to affect the control-target train, a ground running control unit of a train-running management device further changes a running pattern and instructs the control-target train to take less time to completely leave a departure station.

Abstract: A powder rapid prototyping apparatus includes a decompressable chamber, a thin layer forming section which supplies powder material from a powder material housing container provided in the chamber to form a thin layer of the powder material, an energy beam source for heating which outputs energy beam for heating which sinters or melts and models the thin layer of the powder material, and a control section which controls the modeling, wherein the control section exposes the powder material to the decompressed atmosphere before starting modeling, and houses the powder material in the powder material housing containers in a divided manner.

Abstract: A powder rapid prototyping method includes steps of forming a thin layer 35a of a powder material, irradiating a heating energy beam to a specific region of the thin layer 35a of the powder material to thereby form a preliminary heating layer 35c whose temperature is elevated, and irradiating the heating energy beam to an inside region of the preliminary heating layer 35c whose temperature is elevated to melt and then solidify the thin layer 35a of the powder material to thereby form a solidified layer, wherein the respective steps are repeatedly implemented to fabricate a rapid prototyping model 51, 52.

Abstract: A powder rapid prototyping apparatus includes a decompressable chamber, a thin layer forming section which supplies powder material from a powder material housing container provided in the chamber to form a thin layer of the powder material, an energy beam source for heating which outputs energy beam for heating which sinters or melts and models the thin layer of the powder material, and a control section which controls the modeling, wherein the control section exposes the powder material to the decompressed atmosphere before starting modeling, and houses the powder material in the powder material housing containers in a divided manner.

Abstract: A powder sinter layered manufacturing apparatus is provided with a first container 13 of a cylindrical shape for defining a first manufacturing region, a first manufacturing table 15 configured to move vertically along an inner wall of the first container 13, a second container 17 of the cylindrical shape for defining a second manufacturing region within the first manufacturing region, detachably fitted to the first container easily, and provided with a flange which covers an upper face located outside the second manufacturing region but inside first container 13, and a second manufacturing table 15b configured to move vertically up and down along an inner wall of the second container 17.

Abstract: A powder sinter layered manufacturing apparatus is provided with a first container 13 of a cylindrical shape for defining a first manufacturing region, a first manufacturing table 15 configured to move vertically along an inner wall of the first container 13, a second container 17 of the cylindrical shape for defining a second manufacturing region within the first manufacturing region, detachably fitted to the first container easily, and provided with a flange which covers an upper face located outside the second manufacturing region but inside first container 13, and a second manufacturing table 15b configured to move vertically up and down along an inner wall of the second container 17.