Method of fabricating three-dimensional object and apparatus for fabricating three-dimensional object

Patent metadata

Field	Value
Publication number	US-12496638-B2
Application number	US-202318170000-A
Country	US
Kind code	B2
Filing date	Feb 16, 2023
Priority date	Feb 25, 2022
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

There is provided a method of fabricating a three-dimensional object. The method includes supplying, flattening, and collecting. The supplying supplies, with a powder supplier, powder to a fabrication chamber. The fabrication chamber includes a fabrication stage to store powder and an outer edge portion outside the fabrication stage, the outer edge portion having one bottom surface. The flattening flattens, with a flattener, the powder supplied by the supplying. The collecting collects, with a powder collector, the powder having overflowed from the fabrication stage to the outer edge portion by the flattening into the fabrication stage.

First claim

The invention claimed is:

1 . A method of fabricating a three-dimensional object, the method comprising:
supplying, with a powder supplier, powder to a fabrication chamber, the fabrication chamber including a fabrication stage to store powder and an outer edge portion outside the fabrication stage, the outer edge portion having one bottom surface; flattening, with a flattener, the powder supplied by the supplying; and collecting, with a powder collector, the powder having overflowed from the fabrication stage to the outer edge portion by the flattening into the fabrication stage, wherein the powder collector collects the powder on the outer edge portion directly into the fabrication stage.

2 . The method according to claim 1 ,
wherein the outer edge portion has a vertical wall.

3 . The method according to claim 2 ,
wherein a gap between the vertical wall and the powder collector is 0.5 mm or more.

4 . The method according to claim 1 ,
wherein the powder collector has an inclined surface whose rear end in an advance direction of the powder collector is proximate to the fabricating chamber.

5 . The method according to claim 1 ,
wherein the powder collector is attached to the flattener.

6 . The method according to claim 1 ,
wherein the powder collector is made of at least metal.

7 . The method according to claim 1 ,
wherein the flattening includes flattening the powder with the flattener and another flattener in front of or behind the powder supplier in a scanning direction of the powder supplier.

8 . The method according to claim 2 ,
wherein a position of a surface of the powder flattened by the flattening is higher than a top of the vertical wall.

9 . The method according to claim 2 ,
wherein a position of a surface of the powder flattened by the flattening is same as a top of the vertical wall.

10 . The method according to claim 1 ,
wherein the powder collector drops the powder at the outer edge portion into the fabrication chamber when the powder supplier moves without supplying the powder.

11 . An apparatus for fabricating a three-dimensional object, the apparatus comprising:
a fabrication chamber including a fabrication stage to store powder and an outer edge portion outside the fabrication stage; a powder supplier to supply the powder to the fabrication chamber; a flattener to flatten the powder supplied by the powder supplier; and a powder collector to collect, into the fabrication stage, the powder having overflowed from the fabrication stage to the outer edge portion by the flattener, wherein the powder collector is configured to collect the powder on the outer edge portion directly into the fabrication stage.

Assignees

• Tanaka Kohichiroh
• Sakura Shozo
• Osanai Yohei
• Sun Yunsheng
• Ricoh Co Ltd

Inventors

• Tanaka Kohichiroh
• Sakura Shozo
• Osanai Yohei
• Sun Yunsheng

Classifications

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• B22F12/63

  Rollers · CPC title

• B29C64/35

  Cleaning · CPC title

• B29C64/188

  involving additional operations performed on the added layers, e.g. smoothing, grinding or thickness control (surface shaping B29C59/00; after-treatment of articles without altering their shape B29C71/00) · CPC title

• B29C64/153

  using layers of powder being selectively joined, e.g. by selective laser sintering or melting · CPC title