Automated de-powdering with robotically controlled vacuum

Patent metadata

Field	Value
Publication number	US-10500789-B2
Application number	US-201816137283-A
Country	US
Kind code	B2
Filing date	Sep 20, 2018
Priority date	Apr 14, 2017
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A system for de-powdering one or more objects within a powder print bed comprises a build box configured to contain the powder print bed, and a de-powdering subsystem configured to engage the build box. The de-powdering subsystem comprises a vacuum device configured to withdraw loose powder agitated by the air jet device, and a robotic arm configured to convey the vacuum device to one or more locations on the powder print bed. The system may further comprise an air jet device disposed on the robotic arm, the air jet device configured to agitate, with a jet of air, unbound powder within the powder print bed. The system may further comprise a mechanical agitation instrument configured to facilitate agitation of the unbound powder within the powder print bed. The mechanical agitation instrument may be used in conjunction with one or both of the vacuum device and the air jet device.

First claim

What is claimed is:

1. A system for de-powdering one or more objects within a powder print bed, comprising:
a build box configured to contain the powder print bed;
a de-powdering subsystem configured to removably engage the build box via a coupling interface, the de-powdering subsystem comprising:
(i) a vacuum device configured to withdraw loose powder from the build box;
(ii) a robotic control system coupled to the vacuum device and configured to convey the vacuum device to one or more locations on the powder print bed; and
(iii) a vibration generator configured to mechanically vibrate the build box.

2. The system of claim 1 , further comprising an air jet device configured to direct air onto the powder print bed.

3. The system of claim 2 , wherein the robotic control system comprises a first robotic arm configured to convey the vacuum device, and a second robotic arm configured to convey the air jet device.

4. The system of claim 2 , wherein the air jet device comprises one or both of a high-volume, coarse de-powdering air jet device and (b) a low-volume, fine de-powdering air jet device.

5. The system of claim 1 , wherein the de-powdering subsystem is configured to operate the vibration generator in conjunction with the vacuum device.

6. The system of claim 1 , wherein the robotic control system is configured to convey the vacuum device using information related to a surface, associated with one of an object and a group of objects, within the powder print bed.

7. The system of claim 6 , wherein the surface is derived from the one of the object and the group of objects.

8. A system for de-powdering one or more objects within a powder print bed, comprising:
a build box configured to contain the powder print bed;
a de-powdering subsystem configured to engage the build box, the de-powdering subsystem comprising:
(i) a vacuum device configured to withdraw loose powder from the build box;
(ii) a robotic control system coupled to the vacuum device and configured to convey the vacuum device to one or more locations on the powder print bed;
(iii) a vibration generator configured to mechanically vibrate the build box; and
(iv) an air jet device configured to direct an abrasive material onto the powder print bed.

9. The system of claim 2 , wherein the air jet device comprises a cylindrical air jet.

10. The system of claim 1 , wherein the one or more objects are stacked in the powder print bed in a vertical direction, and wherein the robotic control system is configured to convey the vacuum device towards and away from the powder print bed in the vertical direction.

11. The system of claim 8 , wherein the robotic control system comprises a first robotic arm configured to convey the vacuum device, and a second robotic arm configured to convey the air jet device.

12. The system of claim 8 , wherein the air jet device comprises one or both of a high-volume, coarse de-powdering air jet device and (b) a low-volume, fine de-powdering air jet device.

13. The system of claim 8 , wherein the air jet device comprises a cylindrical air jet.

14. The system of claim 8 , wherein the robotic control system is configured to convey the vacuum device using information related to a surface, associated with one of an object and a group of objects, within the powder print bed.

15. A system for de-powdering one or more objects within a powder print bed, comprising:
a build box configured to contain the powder print bed;
a de-powdering subsystem configured to engage the build box, the de-powdering subsystem comprising:
(i) a vacuum device configured to withdraw loose powder from the build box;
(ii) a robotic control system coupled to the vacuum device and configured to convey the vacuum device to one or more locations on the powder print bed;
(iii) a vibration generator configured to mechanically vibrate the build box; and
(iv) an air jet device configured to direct a solvent onto the powder print bed.

16. The system of claim 15 , wherein the robotic control system comprises a first robotic arm configured to convey the vacuum device, and a second robotic arm configured to convey the air jet device.

17. The system of claim 15 , wherein the air jet device comprises a cylindrical air jet.

18. The system of claim 15 , wherein the robotic control system is configured to convey the vacuum device using information related to a surface, associated with one of an object and a group of objects, within the powder print bed.

19. The system claim 8 , wherein the de-powdering subsystem is configured to removably engage the build box via a coupling interface.

Assignees

• Desktop Metal Inc

Inventors

• Fulop Ricardo
• Shydo Jr Robert Michael
• Myerberg Jonah Samuel
• Martin Charles Edward
• Cumming Justin
• Hoisington Paul
• Sachs Emanuel M

Classifications

• B22F12/88

  Handling of additively manufactured products, e.g. by robots · CPC title

• B22F12/222

  for motion along a direction orthogonal to the plane of a layer · CPC title

• B22F10/68

  Cleaning or washing · CPC title

• B22F10/14

  by jetting of binder onto a bed of metal powder · CPC title

• B29C64/35 Primary

  Cleaning · CPC title