Apparatus and method of fabricating three-dimensional object

Patent metadata

Field	Value
Publication number	US-10696036-B2
Application number	US-201715443577-A
Country	US
Kind code	B2
Filing date	Feb 27, 2017
Priority date	Mar 1, 2016
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A three-dimensional fabricating apparatus includes a fabrication chamber, a flattening member, a surplus powder chamber, and an impact applicator. The fabrication chamber stacks powder in layers and a layered fabrication object in which the powder is bonded together. The flattening member relatively moves with respect to the fabrication chamber to fill the fabrication chamber with the powder. The surplus powder chamber is disposed outside the fabrication chamber, to receive a surplus of the powder having not been filled in the fabrication chamber. The impact applicator is movable with the flattening member to contact and impact on the surplus powder chamber.

First claim

What is claimed is:

1. A three-dimensional fabricating apparatus, comprising:
a fabrication chamber to stack powder in layers and a layered fabrication object in which the powder is bonded together;
a flattening member to relatively move with respect to the fabrication chamber to fill the fabrication chamber with the powder;
a surplus powder chamber disposed outside the fabrication chamber, to receive a surplus of the powder having not been filled in the fabrication chamber;
a powder leakage stopper disposed at a side of the flattening member in a longitudinal direction of the flattening member perpendicular to a direction of movement of the flattening member; and
a slant portion to raise the powder leakage stopper with horizontal movement of the flattening member,
wherein, after the powder leakage stopper gets over the slant portion, the powder leakage stopper falls off an end of the slant portion to impact a frame portion of the surplus powder chamber.

2. The three-dimensional fabricating apparatus according to claim 1 , further comprising:
an impact applicator horizontally movable with the flattening member to impact on an outer frame of the surplus powder chamber.

3. The three-dimensional fabricating apparatus according to claim 1 ,
wherein the slant portion is disposed on the frame portion of the surplus powder chamber.

4. The three-dimensional fabricating apparatus according to claim 1 , further comprising:
a plurality of powder leakage stoppers disposed at each side of the flattening member in the longitudinal direction of the flattening member,
wherein the slant portion is disposed on the frame portion of the surplus powder chamber at a position at which the powder leakage stopper passes.

5. The three-dimensional fabricating apparatus according to claim 1 ,
wherein the slant portion is disposed away from the fabrication chamber via an area in which the powder leakage stopper does not run on the slant portion and the flattening member opposes the surplus powder chamber, and
wherein the flattening member moves to a position at which the powder leakage stopper gets over the slant portion, every time a number of times of flattening with the flattening member reaches a predetermined number of times.

6. The three-dimensional fabricating apparatus according to claim 1 ,
wherein the slant portion is disposed away from the fabrication chamber via an area in which the powder leakage stopper does not run on the slant portion and the flattening member opposes the surplus powder chamber, and
wherein the flattening member is movable up to the area while a number of times of flattening with the flattening member is smaller than a set number of times.

7. The three-dimensional fabricating apparatus according to claim 1 ,
wherein a frame portion of the fabrication chamber is a separate member from the frame portion of the surplus powder chamber.

8. The three-dimensional fabricating apparatus according to claim 7 , further comprising:
a vibration absorber disposed between the frame portion of the fabrication chamber and the frame portion of the surplus powder chamber.

9. The three-dimensional fabricating apparatus according to claim 1 ,
wherein an inner wall surface of the surplus powder chamber is processed to reduce a friction coefficient with the powder.

10. The three-dimensional fabricating apparatus according to claim 1 ,
wherein the flattening member is a roller.

Assignees

• Park Soyoung
• Ricoh Co Ltd

Inventors

• Park Soyoung

Classifications

• B33Y40/00

  Auxiliary operations or equipment, e.g. for material handling · CPC title

• B29C64/357 Primary

  Recycling · CPC title

• B33Y30/00 Primary

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• B29C64/165

  using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title