Granted Patent B2

US 12,427,577 · App. 17/776,371 · Granted Sep 30, 2025

Inventors: Yusuke Yamaguchi (Tokyo, JP); Tomohiro Oyama (Tokyo, JP); Hiroki Amano (Tokyo, JP); Ryo Akamatsu (Tokyo, JP)

Assignee: TAIYO NIPPON SANSO CORPORATION

B22F10/32B22F10/28B22F12/41B22F12/70B33Y10/00B33Y30/00B33Y40/00

Abstract

Claims (28)

1. A laminating-printing system in which heat is supplied to a powder material using energy rays in the presence of a shield gas to print layers, and the layers are sequentially laminated to produce a laminated-printed object,

wherein the laminating-printing system comprises:

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; and

a shield gas supply line which supplies the shield gas into the chamber, and

the laminating-printing unit comprises:

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 comprises:

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,

wherein the laminating-printing system further comprises a first supply line which supplies a part of the shield gas in the chamber into the purification section, and

the purification section comprises at least one selected from the group consisting of a first purification tower, a second purification tower, a third purification tower, and a fourth purification tower, which are connected with the first supply line, wherein:

the first purification tower is a purification tower which removes oxygen from the shield gas;

the second purification tower is a purification tower which removes water from the shield gas;

the third purification tower is a purification tower which removes nitrogen from the shield gas;

the fourth purification tower is a purification tower which removes water and does not remove oxygen from the shield gas; and

wherein the purification section further comprises at least one selected from the group consisting of a first bypass line, a second bypass line, a third bypass line, and a fourth bypass line:

wherein the first bypass line is a bypass line in which the shield gas supplied from the first supply line is supplied to the secondary side of the first purification tower without being supplied to the first purification tower;

wherein the second bypass line is a bypass line in which the shield gas supplied from the first supply line is supplied to the secondary side of the second purification tower without being supplied to the second purification tower;

wherein the third bypass line is a bypass line in which the shield gas supplied from the first supply line is supplied to the secondary side of the third purification tower without being supplied to the third purification tower;

wherein the fourth bypass line is a bypass line in which the shield gas supplied from the first supply line is supplied to the secondary side of the fourth purification tower without being supplied to the fourth purification tower.

2. The laminating-printing system according to claim 1 ,

wherein the supply section comprises a source of the second gas component which is at least one selected from the group consisting of hydrogen, oxygen, carbon monoxide, carbon dioxide, and ammonia.

3. The laminating-printing system according to claim 1 ,

wherein the laminating-printing system further comprises:

a second supply line which supplies gas from which the first gas component has been removed from the shield gas by the purification section into the chamber; and

a third supply line which supplies the second gas component to the gas in the second supply line as needed.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (20)