Automated three-dimensional printer part removal

Patent metadata

Field	Value
Publication number	US-9289946-B2
Application number	US-201414157027-A
Country	US
Kind code	B2
Filing date	Jan 16, 2014
Priority date	Feb 1, 2013
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

Three-dimensional printing system with automated part removal. In one embodiment, the system includes a printing surface on which a part is made and a printing device supported for controlled movement with respect to the printing surface to print the part on the printing surface. A blade is supported for motion across the printing surface to release the part from the printing surface. The present printing system according to the invention requires fewer user steps than known in the prior art.

First claim

What is claimed is:

1. Three-dimensional printing system comprising:
a printing surface on which a part is made;
a printing device supported for controlled movement with respect to the printing surface to print the part on the printing surface; and
a blade supported for motion only across the printing surface while remaining in contact with the printing surface throughout the motion to traverse the printing surface and to engage and release the part from the printing surface.

2. The printing system of claim 1 further including a solenoid-controlled pneumatic piston to move the blade.

3. The printing system of claim 1 wherein the blade is cantilevered from a support on one side of the printing surface.

4. The printing system of claim 1 wherein the blade is supported on both sides of the printing surface.

5. The printing system of claim 3 wherein the support forms a compliant joint.

6. The printing system of claim 1 wherein the blade has a hardened steel portion that engages the part.

7. The printing system of claim 1 further including a lead screw to move the blade.

8. The printing system of claim 1 further including a drive pulley driving belt to move the blade to remove the printed part.

9. The printing system of claim further including a rack and pinion arrangement to move the blade.

10. The printing system of claim 1 further including means to cause the blade to vibrate.

11. The printing system of claims 1 further including a helper device to remove the released part.

12. The printing system of claim 11 further including a compressed air jet to remove the released part.

13. The printing system of claims 1 further including a fixed barrier to restrain a released part.

14. The printing system of claims 1 further including a torqued pivoting barrier attached to the blade.

15. The printing system of claims 1 further including an elastic band mounted on the blade to remove a released part.

16. The printing system of claim 1 further including a computer vision system including at least one camera to detect successful part removal.

17. The printing system of claim 1 wherein the printing surface is kinematically coupled to a support structure for rapid and precise leveling of the printing surface.

18. The printing system of claim 17 further including structure to preload the printing surface with respect to the support structure.

19. The printing system of claim 18 wherein the preload structure includes a magnet.

20. The printing system of claim 17 wherein the support structure includes a plurality of protrusions extending from the support structure allowing the printing surface to assume an approximately level position at a selected rotational orientation.

Assignees

• Massachusetts Inst Technology

Inventors

• Perez Alfonso Alexander
• Haid Christopher Michael
• Pieper Forrest W
• Pena Doll Mateo

Classifications

• B33Y40/00

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

• B29C67/0085 Primary

  Operations & Transport · mapped topic

• B29C37/0007

  using means operable from outside the mould for moving between mould parts, e.g. robots · CPC title

• B29C64/236

  for motion in a direction within the plane of a layer · CPC title

• B29C64/214

  Doctor blades · CPC title