Three-dimensional printer having an expandable envelope

Patent metadata

Field	Value
Publication number	US-9314969-B1
Application number	US-201414520669-A
Country	US
Kind code	B1
Filing date	Oct 22, 2014
Priority date	Oct 20, 2014
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

One embodiment of the present invention provides a method of three-dimensional printing. The method includes a three-dimensional printer printing a first layer of an object onto a surface that is not part of the three-dimensional printer, wherein the first layer is printed while a printing platform of the three dimensional printer is in a first position. The printer is autonomously repositioned in a second position elevated above the first position by being supported either on the three-dimensional object itself or on a scaffold printed separate from the object. The printer prints a second layer of the three-dimensional object onto the first layer of the three-dimensional object while the printing platform is in the second position. The printer may have a plurality of legs for controllably repositioning the printing platform.

First claim

What is claimed is:

1. A method, comprising:
a three-dimensional printer printing a first layer of a three-dimensional object onto a surface that is not part of the three-dimensional printer, wherein the first layer is printed while a printing platform of the three dimensional printer is in a first position;
the three-dimensional printer printing a first layer of a scaffold separate from the first layer of the three-dimensional object;
autonomously repositioning the three-dimensional printer to be supported on the scaffold in a second position elevated above the first position; and
printing a second layer of the three-dimensional object onto the first layer of the three-dimensional object while the printing platform is in the second position.

2. The method of claim 1 , wherein the scaffold is printed around the perimeter of the three-dimensional object.

3. The method of claim 1 , wherein the three-dimensional printer includes a plurality of legs secured to the printing platform.

4. The method of claim 3 , wherein the plurality of legs include a first subset of at least three legs and a second subset of at least three legs.

5. The method of claim 4 , wherein the scaffold includes a separate scaffold structure associated with each of the plurality of legs.

6. The method of claim 4 , wherein the scaffold includes a first subset of scaffold structures associated with the first subset of legs and a second subset of scaffold structures associated with the second subset of legs.

7. The method of claim 6 , wherein autonomously repositioning the three-dimensional printer to be supported on the scaffold in a second position elevated above the first position, includes:
supporting the printing platform on the second subset of legs;
articulating the first subset of the legs to engage the first subset of scaffold structures and support the printing platform in the first position while the first layer of the second subset of scaffold structures is printed;
articulating the second subset of the legs to engage the second subset of scaffold structures and support the printing platform in the first position; and
articulating the first subset of the legs to lift the printing platform from the first position to the second position.

8. The method of claim 6 , wherein autonomously repositioning the three-dimensional printer to be supported on the scaffold in a second position elevated above the first position, includes:
supporting the printing platform on the second subset of legs; and
articulating the first subset of the legs to engage the first subset of scaffold structures and lift the printing platform to the second position before the first layer of the second subset of scaffold structures is printed.

9. The method of claim 1 , further comprising:
while the printing platform is in the second position, the three-dimensional printer printing a second layer of the three-dimensional object over the first layer of the three-dimensional object and a second layer of the scaffold over the first layer of the scaffold.

10. The method of claim 7 , further comprising:
moving the first subset of the legs out of alignment with the first subset of scaffold structures to allow printing a second layer of the first subset of scaffold structures on the first layer of the first subset of scaffold structures; and
moving the second subset of the legs out of alignment with the second subset of scaffold structures to allow printing a second layer of the second subset of scaffold structures on the first layer of the second subset of scaffold structures.

11. The method of claim 3 , wherein each leg includes a scaffold print head for printing a scaffold structure to support the leg.

12. The method of claim 11 , wherein the scaffold print head prints the scaffold structure outside the range of the object print head.

13. The method of claim 11 , wherein the scaffold print heads included with the first subset of legs print scaffold structures simultaneously, and wherein the scaffold print heads included with the second subset of legs print scaffold structures simultaneously.

14. The method of claim 11 , wherein printing a first layer of the three-dimensional object while the printer is supported on the first subset of scaffolds, includes printing multiple layers of the three-dimensional object while the printer is supported on the first subset of scaffolds at a particular elevation; and
wherein printing a second layer over the first layer of the three-dimensional object while the printer is supported on the second subset of scaffolds, includes printing multiple layers of the three-dimensional object while the printer is supported on the second subset of scaffolds at a particular elevation.

15. The method of claim 14 , wherein printing the second layer of the second subset of the scaffold structures, includes printing multiple layers on the second subset of scaffold structures while the three-dimensional printer is supported on the first subset of scaffolds at a particular elevation; and
wherein printing the second layer of the first subset of the scaffold structures, includes printing multiple layers on the first layer of the first subset of scaffold structures while the three-dimensional printer is supported on the second subset of scaffolds at the particular elevation.

16. The method of claim 1 , further comprising:
optically scanning the three-dimensional object after the three-dimensional printer is supported in the second position; and
adjusting printing instructions for printing the second layer of the three-dimensional object after the three-dimensional printer is supported in the second position to account for changes in alignment of the printer relative to the three-dimensional object.

17. A method, comprising:
a three-dimensional printer printing a first layer of a three-dimensional object onto a surface that is not part of the three-dimensional printer, wherein the first layer is printed while a printing platform of the three dimensional printer is in a first position;
autonomously repositioning the printing platform of the three-dimensional printer to be supported on the three-dimensional object in a second position elevated above the first position; and
printing a second layer of the three-dimensional object on the first layer of the three-dimensional object while the printing platform of the three-dimensional printer is in the second position.

18. The method of claim 17 , further comprising:
modifying print instructions for the three-dimensional object to reinforce the strength of regions of the three-dimensional object that will support the three-dimensional printer.

19. The method of claim 17 , wherein autonomously repositioning the printing platform of the three-dimensional printer to be supported on the three-dimensional object in a second position elevated above the first position, includes:
a second subset of at least three legs supporting the printing platform on the surface that is not part of the three-dimensional printer; and
articulating a first subset of the legs to engage the first layer of the three dimensional object and support the printing platform while the second layer of the three-dimensional object is printed.

20. The method of claim 19 , further comprising:
articulating the second subset of the legs to engage the second layer of the three-dimensional object and support the printing platform;
articulating the first subset of the legs out of alignment with a region of the three-dimensional object wh

Assignees

• Lenovo Entpr Solutions Singapore Pte Ltd

Inventors

• Davis Alvin G
• Megarity William M
• Ruggles April E
• Wormsbecher Paul A

Classifications

• B33Y50/02

  for controlling or regulating additive manufacturing processes · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B29C64/118

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title

• B62D57/032

  with alternately or sequentially lifted supporting base and legs; with alternately or sequentially lifted feet or skid (B62D57/024 takes precedence) · CPC title

• B33Y30/00

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