Taiyo Nippon Sanso Corporation

Mitsubishi Aluminum Company, Ltd.

Hiroki Amano

Yusuke Yamaguchi

Hideyuki Miyake

Masakazu Edo

Toyoyuki Sato

Ryo Akamatsu

Tomoaki Sasaki

Tomohiro Oyama

Masatoshi Akiyama

Yuji Nomura

Norihiro Nose

An object of the present invention is to provide a laminating-printing system which can further improve the quality of laminated-printed objects. The present invention provides a laminating-printing system including a laminating-printing unit () which prints the layers and sequentially laminates the layers; and a concentration adjusting unit () which adjusts the concentration of gas components in the shield gas, the laminating-printing unit () including: an irradiation section including an irradiation source of energy rays to irradiate the powder material, and a printing section including a chamber filled with the shield gas and a printing stage on which the layers are printed and laminated, and the concentration adjusting unit () including: a purification section which removes a first gas component which is an impurity in the shield gas based on the powder material; and a supply section which supplies a second gas component selected based on the powder material inside of the chamber as needed.

Laminating-printing system and laminating-printing method

An object of the present invention is to provide a method for manufacturing a metal printed object that can reduce the generation of sputters, and the present invention provides a method for manufacturing a metal printed object in which, in the presence of a shielding gas supplied around metal powder in a chamber, heat is supplied to the metal powder using energy rays to form a metal layer and laminate the metal layer, wherein the mass per unit volume of the shielding gas at a temperature of 25° C. and a pressure of 0.1 MPa is 1.30×10g/cmor less.

Method for manufacturing metal printed object

In order to enable a satisfactory fluxless brazing without needing flux or vacuum facilities, a brazing object including an aluminum alloy material provided with an Al&#x2014;Si&#x2014;Mg brazing filler metal is joined by the Al&#x2014;Si&#x2014;Mg brazing filler metal without the use of flux by heating the aluminum alloy material, when raising the temperature in a brazing furnace, at least in a temperature range of 450&#xb0; C. to before melting of the filler metal under a first inert gas atmosphere having an oxygen concentration of preferably 50 ppm and following by heating at least at or above a temperature at which the filler metal starts to melt under a second inert gas atmosphere having an oxygen concentration of preferably 25 ppm and a nitrogen gas concentration of preferably 10% by volume or less. The oxygen concentration and nitrogen concentration in the atmosphere in the course of brazing are controlled in this way, whereby the reliability of a joint is remarkably improved, compared with conventional fluxless brazing methods, while suppressing cost increases as much as possible.

Brazing method of aluminum material and brazed structure

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Tokyo, Japan

Hiroki Amano