METHOD AND SYSTEM FOR BUILDING PAINTED THREE-DIMENSIONAL OBJECTS

• US 20100195122A1
• Filed: 02/03/2009
• Published: 08/05/2010
• Est. Priority Date: 02/03/2009
• Status: Active Grant

• Current Assignee: Stratasys Incorporated
• Original Assignee: Objet Ltd. (Stratasys Incorporated)
• Inventors: KRITCHMAN, Eliahu M.
• Granted Patent: US 7,991,498 B2
• Time in Patent Office: Days
• US Class Current: 358/1.9
• CPC Class Codes: B28B 1/001 Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material selective deposition modelling of metallic powder B22F10/00; rapid manufacturing of 3D objects in general and in particular of plastics B29C64/00
• CPC Class Codes: B29C 64/112 using individual droplets, e.g. from jetting heads
• CPC Class Codes: B29C 64/124 using layers of liquid which are selectively solidified
• CPC Class Codes: B29C 64/386 Data acquisition or data processing for additive manufacturing
• CPC Class Codes: B29K 2995/002 Coloured
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: B33Y 50/00 Data acquisition or data processing for additive manufacturing
• CPC Class Codes: B33Y 50/02 for controlling or regulating additive manufacturing processes
• CPC Class Codes: B41M 1/18 Printing one ink over another
• CPC Class Codes: B41M 5/0047 by ink-jet printing
• CPC Class Codes: B41M 7/0027 using protective coatings or layers by lamination or by fusion of the coatings or layers
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 2219/49023 3-D printing, layer of powder, add drops of binder in layer, new powder
• CPC Class Codes: Y10T 428/24876 Intermediate layer contains particulate material [e.g., pigment, etc.]

Abstract

Embodiments of the invention are directed to a method for printing a painted three-dimensional object. Each layer of the object is printed so that only the external circumference of the layer contains colored material. The building material used may be transparent, and a white colored material may be used as a barrier between the building material and the colored material.

Claims

1. A method of printing a three dimensional (3D) colored object, layer-by-layer, the method comprising:

dividing apparent surface of the 3D object into 3D color cells, wherein each of the 3D color cells comprises a tangential area with respect to the apparent surface and a depth dimension directing toward the inner region of the object and the size of each color cell is determined according to a desired color spatial resolution and color shade resolution;

generating color patterns of basic colors, each pattern for a respective 3D color cell according to a desired color shade of the cell;

generating two-dimensional (2D) image data for layers of the 3D objects, wherein the 2D image data includes outline color data based on the color patterns; and

selectively depositing materials on successive layers based on the 2D image data to produce the 3D colored object.

2. The method of claim 1, wherein the size of the tangential area is determined according to the desired color spatial resolution.

3. The method of claim 1, wherein the depth is determined according to the desired color shade resolution.

4. The method of claim 1, wherein the color shade resolution is defined by the number of building voxels in the color cell.

5. The method of claim 1, wherein selectively depositing comprises depositing one or more colored materials on an outline region of a layer and white material on an inner region adjacent to the outline region.

6. The method of claim 1, wherein selectively depositing comprises depositing a transparent material on an external circumference of the layer externally adjacent to the outline region.

7. The method of claim 1, wherein selectively depositing comprises using transparent material as a building material and depositing color additives on at least a portion of an outline region of one of the layers in addition to depositing the transparent material on the portion.

8. The method of claim 7, wherein selectively depositing comprises depositing a white additive on an inner region adjacent to the outline region.

9. The method of claim 7, wherein more that one of the color additives is deposited on a building voxel.

10. The method of claim 1, wherein selectively depositing comprises using white material as building material for inner areas of the 3D object.

11. The method of claim 1, wherein the basic colors include at least two of yellow, magenta, cyan and black.

12. The method of claim 1, wherein within the color cell, one or more of the basic colors are evenly scattered among voxels directed to the color cell.

15. The article of claim 1, wherein the depth is determined according to the desired color shade resolution.

16. The article of claim 1, wherein the color shade resolution is defined by the number of building voxels in the color cell.

17. The article of claim 1, wherein the instructions that when executed result in selectively depositing further result in:

depositing one or more colored materials on an outline region of a layer and white material on an inner region adjacent to the outline region.

18. The article of claim 1, wherein the instructions that when executed result in selectively depositing further result in:

depositing a transparent material on an external circumference of the layer externally adjacent to the outline region.

19. The article of claim 1, the instructions that when executed result in selectively depositing further result in:

using transparent material as a building material and depositing color additives on at least a portion of an outline region of one of the layers in addition to depositing the transparent material on the portion.

20. The article of claim 19, wherein the instructions that when executed result in selectively depositing further result in:

depositing a white additive on an inner region adjacent to the outline region.

13. An article comprising a computer-storage medium having stored thereon instructions that, when executed by a processing platform, result in:

dividing apparent surface of the 3D object into 3D color cells, wherein each of the 3D color cells comprises a tangential area with respect to the apparent surface and a depth dimension directing toward the inner region of the object and the size of each color cell is determined according to a desired color spatial resolution and color shade resolution;

generating color patterns of basic colors, each pattern for a respective 3D color cell according to a desired color shade of the cell;

generating two-dimensional (2D) image data for layers of the 3D objects, wherein the 2D image data includes outline color data based on the color patterns; and

selectively depositing materials on successive layers based on the 2D image data to produce the 3D colored object.

14. The article of claim 13, wherein the size of the tangential area is determined according to the desired color spatial resolution.