Matsuura Machinery Corporation

Technology Research Association for Future Additive Manufacturing

Fukui Prefectural Government

Technology Reseach Association for Future Additive Manufacturing

Tetsushi Midorikawa

Koichi Amaya

Kouichi Amaya

Toshihiko Kato

Mitsuyoshi Yoshida

Hideto Matsubara

Seiichi Tomita

Masaaki Kawaji

Ryuzo Tanaka

Takeshi Yamada

Kazuhiro Shimizu

Kazuyuki Morishita

Yuya Matsuda

Tomita Seiichi

This invention provides a three-dimensional laminating and fabricating system that can remove the influence of a gas flow between the irradiation positions by a plurality of irradiators. The three-dimensional laminating and fabricating system includes a laminating and fabricating unit that includes a plurality of irradiators configured to irradiate a laminating material, and a remover configured to generate a flow path on a laminated surface and remove dust generated by the irradiated laminating material, to cause the plurality of irradiators to perform irradiation to fabricate each layer of a laminated and fabricated object made of the laminating material as an aggregate of cell regions, and a laminating and fabricating controller that controls selection of each of the cell regions to be irradiated by each of the plurality of irradiators so as to prevent the dust generated in each of the cell regions on an upstream side of the flow path from influencing fabricating in each of the cell regions on a downstream side of the flow path.

Three-dimensional laminating and fabricating system, three-dimensional laminating and fabricating method, laminating and fabricating control apparatus and method of controlling the same, and control program

A three-dimensional shaping apparatus includes a shaping table, a squeegee, a sintering device, a cutting device, transport pathwaysthrough which metal powder and fumes that have been discharged to the outer side of a shaping tankafter cutting with the cutting device, and metal powder that has been discharged to the outer side of a chambersurrounding the shaping tankwithout forming part of the laminated layer, are transported to a sifterlocated at the top of a powder tank, and supply devices for inert gas that does not react with the metal powder at an inletof each transport pathway, so as to suppress oxidation of metal powder in the transport pathway for collected metal powder and fumes, and also dust explosion due to sudden oxidation of the same.

Three-dimensional shaping apparatus

A system of this invention is a three-dimensional laminating and fabricating system that suppresses, in advance, a squeezing blade from getting caught on a surface of a laminated and fabricated object. The three-dimensional laminating and fabricating system includes a laminating and fabricating unit that includes a squeezing blade configured to spread a laminating material on an upper layer of a laminated and fabricated object, and an irradiator configured to irradiate the laminating material, and fabricates each layer of the laminated and fabricated object as an aggregate of cell regions, and a laminating and fabricating controller that controls the laminating and fabricating unit such that a scanning direction in which the irradiator irradiates the laminating material in the cell region changes with respect to a moving direction of the squeezing blade during laminating and fabricating.

This invention provides a three-dimensional laminating and fabricating system that shortens the scanning time of a divided scanning region and shortens the fabricating time of three-dimensional laminating and fabricating. The three-dimensional laminating and fabricating system includes a laminating and fabricating unit that includes at least one irradiator configured to irradiate a laminating material and fabricates each layer of a laminated and fabricated object made of the laminating material as an aggregate of cell regions, and a laminating and fabricating controller that controls the laminating and fabricating unit such that the irradiator irradiates the laminating material in each of the cell regions by performing spiral scanning along sides of a scanning region that is used to irradiate the cell regions by the irradiator and has a shape including at least five vertices with an interior angle of not less than 90&#xb0;.

A three-dimensional molding method in which a step of sintering a powder layer with a laser light or an electron beam after a flat surface has been formed by sliding of a squeegee against the powder layer is repeated in a prescribed number of times, and then the periphery is cut, in order to mold both the objectto be molded and a support structurethat supports the lower side of the objectfrom below and is intended to be removed after molding, wherein in the support structure, the upper parts of the struts connected to the objectto be molded employ truncated circular conic shapes or partial truncated circular conic shapes that are reduced in diameter toward the top.

Three-dimensional molding method

In a three-dimensional shaping device, a region of an elevatable/lowerable tablefor forming a powder layer and a region of a powder supply device are divided by a shield plate, an inert gas injection port is provided in the former region, the shield plate can be freely opened or closed so that a powder spraying squeegee traveling on the table is passed through, or a pipe which supplies powder from the powder supply device to the powder spraying squeegee which has traveled to the side of the shield plate penetrates through the shield plate, or a part of the shield plate is the powder supply port for the powder spraying squeegee which has traveled to the side of the shield plate and the pipe protrudes at a lower part and a sintering device applies a laser beam via a transparent region in a ceiling of a chamber.

Growing community of inventors

Fukui, Japan

Tetsushi Midorikawa