Method and system for using porous structures in solid freeform fabrication

• US 20050074596A1
• Filed: 10/06/2003
• Published: 04/07/2005
• Est. Priority Date: 10/06/2003
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Nielsen, Jeffrey A., Cruz-Uribe, Tony S., Collins, David C.
• Application Number:
  US10/680,366
• Publication Number:
  US 20050074596A1
• Time in Patent Office: Days
• US Class Current: 428/304.400
• CPC Class Codes: B29C 64/112 using individual droplets, e.g. from jetting heads
• CPC Class Codes: B29C 64/40 Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
• CPC Class Codes: B29K 2995/0005 Conductive
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]

Abstract

A method for producing porous structures in a three-dimensional object with solid freeform fabrication includes selectively depositing a removable support material, depositing a build material defining the three-dimensional object, and removing the selectively deposited removable support material to form a number of pores within the three-dimensional object.

Claims

1. A method for producing porous structures in a three-dimensional object with solid freeform fabrication comprising:

selectively depositing a removable support material;

depositing a build material defining said three-dimensional object; and

removing said selectively deposited removable support material to form a number of pores within said three-dimensional object.

2. The method of claim 1, further comprising selectively depositing a non-removable support material

3. The method of claim 1, further comprising planarizing said build material or said removable support material.

4. The method of claim 1, further comprising solidifying said build material.

5. The method of claim 4, wherein said solidifying said build material comprises one of electromagnetic radiation, the application of heat, or a chemical cure activated by chemical agents present in said build material.

6. The method of claim 4, wherein said solidifying said build material occurs after said build material has flowed with respect to said removable support material.

7. The method of claim 1, further comprising infiltrating said pores with a property enhancing material.

8. The method of claim 7, wherein said property enhancing material comprises one of a high toughness material, a flexible material, a lubricant, an odorant, a de-odorant, a drug, a colorant, a reactive gas, a reactive liquid, an electrostatic or electromagnetic enhancing material, or an adhesive.

9. The method of claim 1, wherein said selectively depositing a removable support material comprises depositing said removable support material with a high-precision dispenser.

10. The method of claim 9, wherein said selectively depositing a removable support material further comprises vertically stacking a number of removable support material voxels.

11. The method of claim 9, wherein said selectively depositing a removable support material further comprises selectively depositing a number of removable support material voxels in a planar array configuration.

12. The method of claim 1, wherein said depositing a build material comprises depositing said build material with a low precision dispenser.

13. The method of claim 1, wherein said depositing a build material comprises depositing said build material with a high precision dispenser.

14. The method of claim 1, wherein said removing said selectively deposited removable support material comprises one of removal by manual separation, removal by dissolving said removable support material with a solvent, or removal by applying sufficient thermal energy to soften or melt said removable support material.

15. A method for producing porous structures in a three-dimensional object with solid freeform fabrication comprising:

selectively depositing a rapidly solidifying build material in a porous configuration; and

coupling said deposits of rapidly solidifying build material to form said three-dimensional object.

16. The method of claim 15, further comprising disposing a property enhancing material in said porous configuration.

17. The method of claim 16, wherein said property enhancing material comprises one of a high toughness material, a flexible material, a lubricant, an odorant, a de-odorant, a drug, a colorant, a reactive gas, a reactive liquid, an electrostatic or electromagnetic enhancing material, or an adhesive.

18. The method of claim 15, wherein said coupling said deposits of rapidly solidifying build material comprises depositing coupling material on said deposits of rapidly solidifying build material such that said coupling material overhangs said porous configuration.

19. The method of claim 15, wherein said selectively depositing a rapidly solidifying build material in a porous configuration comprises vertically stacking voxels of said rapidly solidifying build material with a high precision material dispenser.

20. The method of claim 15, wherein said selectively depositing rapidly solidifying build material in a porous configuration comprises depositing voxels of said rapidly solidifying build material in a planar array.

21. A method for producing porous structures in a three-dimensional object with solid freeform fabrication comprising:

forming a plurality of support material containment structures, wherein said containment structures are separated by a porous gap;

dispensing bulk build material into said support material containment structures; and

coupling said containment structures.

22. The method of claim 21, wherein said plurality of support material containment structures are formed with a high precision material dispenser.

23. The method of claim 22, wherein said forming a plurality of containment structures comprises stacking a plurality of support material voxels.

24. The method of claim 22, wherein said forming a plurality of containment structures comprises selectively disposing support material voxels in a planar array.

25. The method of claim 21, wherein said dispensing bulk build material comprises dispensing a specified quantity of build material with a low precision material dispenser.

26. The method of claim 21, wherein said coupling said containment structures comprises selectively dispensing build or support material that overhangs said porous gap.

27. The method of claim 21, further comprising infiltrating said porous gap with a property enhancing material.

28. The method of claim 27, wherein said property enhancing material comprises one of a high toughness material, a flexible material, a lubricant, an odorant, a de-odorant, a drug, a colorant, a reactive gas, a reactive liquid, an electrostatic or electromagnetic enhancing material, or an adhesive.

29. An object created by solid freeform fabrication, said object comprising:

a plurality of bound polymer jetted build material including a cured material; and

a plurality of cavities disposed within said object material, said cavities formed within said cured build material by selective deposition of a support material.

30. The object of claim 29, wherein said plurality of cavities are interconnected.

31. The object of claim 30, wherein said interconnected cavities extend to a surface of said object.

32. The object of claim 31, wherein said interconnected cavities are infiltrated by a property enhancing material.

33. The object of claim 32, wherein said interconnected cavities comprise variable cross-sections throughout said object.

34. The object of claim 32, wherein said property enhancing material comprises one of a high toughness material, a flexible material, a lubricant, an odorant, a de-odorant, a drug, a colorant, a reactive gas, a reactive liquid, an electrostatic or electromagnetic enhancing material, or an adhesive.

35. The object of claim 29, wherein said cavities were formed by the removal of said removable support material.

36. The object of claim 35, wherein said removable support material was removed by one of removal by manual separation, removal by dissolving said removable support material with a solvent, or removal by applying sufficient thermal energy to soften or melt said removable support material.

37. A solid freeform fabrication apparatus comprising:

a build platform;

a movable stage for distributing material on said build platform; and

a first material dispenser coupled to said movable stage;

wherein said first material dispenser functions as a high resolution dispenser to selectively deposit a porous forming removable support material.

38. The apparatus of claim 37, further comprising a roller configured to planarize said removable support material.

39. The apparatus of claim 37, further comprising a second material dispenser configured to dispense object build material around said removable support material.

40. The apparatus of claim 39, wherein said second material dispenser is configured to function as both a high precision material dispenser or as a low precision material dispenser.

41. The apparatus of claim 39, wherein said first material dispenser and said second material dispenser comprise inkjet print heads.

42. A solid freeform fabrication apparatus comprising:

a containment means for containing fabrication materials;

a distribution means for distributing said fabrication materials in said containment means;

a high resolution material dispensing means for selectively depositing a removable porous forming support material; and

a material dispensing means for dispensing a build material around said removable porous forming support material.

43. The solid freeform fabrication apparatus of claim 42, further comprising a planarizing means for planarizing said materials.

44. The solid freeform fabrication apparatus of claim 42, wherein said high resolution material dispensing means comprises an inkjet printhead.

45. A processor readable medium having instructions thereon for:

receiving data corresponding to a solid freeform fabrication object;

controlling a selective dispensing of material to form a removable support material, wherein said removable support material is dispensed with a high precision dispenser; and

controlling a dispensing of a build material around said removable support material to form said solid freeform fabrication object.

46. The processor readable medium of claim 45, wherein said high precision dispenser and said low precision dispenser comprise an inkjet print head.