The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2025
Filed:
Mar. 08, 2021
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Assignee:
HITACHI, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F 10/32 (2021.01); B22F 10/28 (2021.01); B22F 12/17 (2021.01); B22F 12/30 (2021.01); B29C 64/153 (2017.01); B29C 64/245 (2017.01); B29C 64/295 (2017.01); B29C 64/371 (2017.01); B33Y 10/00 (2015.01);
U.S. Cl.
CPC ...
B22F 10/32 (2021.01); B22F 10/28 (2021.01); B22F 12/17 (2021.01); B22F 12/30 (2021.01); B29C 64/153 (2017.08); B29C 64/245 (2017.08); B29C 64/295 (2017.08); B29C 64/371 (2017.08); B33Y 10/00 (2014.12); B22F 2201/11 (2013.01);
Abstract
The present disclosure provides an additive manufacturing method by which a uniform powder bed can be formed even when the interior of a chamber is depressurized and a powder bed is formed on a stage as the stage is preheated and an inert gas is supplied. An additive manufacturing method for a shaped object S includes forming a powder bed PB on a stagein a chamber, and fusing the powder bed PB by laser emission. According to this additive manufacturing method, a pressure in the chamberis reduced to a pressure equal to or higher than 8000 [Pa] and equal to or lower than 30,000 [Pa], and the powder bed PB is formed on the stageas the stageis preheated and an inert gas is supplied.