Title:
ADDITIVE MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/030042
Kind Code:
A1
Abstract:
The present disclosure provides an additive manufacturing method that makes it possible to form a uniform powder bed, even when the pressure inside a chamber is reduced and the powder bed is formed on a stage while the stage is preheated and an inert gas is supplied. An additive manufacturing method for a sculpted object S that involves forming a powder bed PB on a stage 51 inside a chamber 10 and fusing the powder bed PB by laser irradiation. The pressure inside the chamber 10 is reduced to 8000–30000 [Pa], and the powder bed PB is formed on the stage 51 while the stage 51 is preheated and an inert gas is supplied.
Inventors:
KAWANAKA HIROTSUGU (JP)
SAITO NOBORU (JP)
MATSUSHITA SHINJI (JP)
SAITO NOBORU (JP)
MATSUSHITA SHINJI (JP)
Application Number:
PCT/JP2021/009091
Publication Date:
February 10, 2022
Filing Date:
March 08, 2021
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
B22F10/32; B22F3/105; B22F3/16; B22F10/28; B29C64/153; B29C64/371; B29C64/393; B33Y10/00; B33Y50/02
Foreign References:
| JP2017145476A | 2017-08-24 | |||
| JP2019142024A | 2019-08-29 | |||
| JP2010265521A | 2010-11-25 | |||
| JP2017110261A | 2017-06-22 | |||
| JP2017105075A | 2017-06-15 | |||
| US20190232429A1 | 2019-08-01 |
Attorney, Agent or Firm:
HIRAKI & ASSOCIATES (JP)
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