Powder removal system for three-dimensional object fabricator

• US 20040084814A1
• Filed: 10/31/2002
• Published: 05/06/2004
• Est. Priority Date: 10/31/2002
• 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, Boyd, Melissa D.
• Application Number:
  US10/286,260
• Publication Number:
  US 20040084814A1
• Time in Patent Office: Days
• US Class Current: 264/497
• CPC Class Codes: B29C 64/153 using layers of powder being selectively joined, e.g. by selective laser sintering or melting
• CPC Class Codes: B29C 64/165 using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
• CPC Class Codes: B29C 64/35 Cleaning
• CPC Class Codes: B29C 64/357 Recycling
• CPC Class Codes: B33Y 40/00 Auxiliary operations or equipment, e.g. for material handling

Abstract

A three-dimensional object fabricator with an unbound powder removal system is disclosed. The object fabricator forms an object by binding regions of unbound powder in a chamber having the unbound powder removal system operably secured thereto. Unbound powder is removed from the chamber by the unbound powder removal system.

Claims

1. An unbound powder removal system for a three-dimensional object fabricator that forms an object in a chamber of unbound powder by binding regions of the unbound powder, said unbound powder removal system including:

a vacuum vent operably secured to a boundary of the chamber; and

a vacuum source in pneumatic communication with the vacuum vent such that unbound powder may be automatically removed from the chamber through the vacuum vent.

2. The unbound powder removal system for a three-dimensional object fabricator of claim 1, wherein said vacuum vent has an opened position wherein said vacuum vent is in pneumatic communication with the vacuum source, and a closed position wherein said vacuum vent is pneumatically isolated from the vacuum source.

3. The unbound powder removal system for a three-dimensional object fabricator of claim 1, wherein said chamber has a floor and said vacuum vent is positioned on said floor.

4. The unbound powder removal system for a three-dimensional object fabricator of claim 1, wherein said chamber has a side wall and said vacuum vent is positioned on said side wall.

5. The unbound powder removal system for a three-dimensional object fabricator of claim 1, further including a vibration generator operably secured to said chamber.

6. The unbound powder removal system for a three-dimensional object fabricator of claim 1, further including a plurality of spaced-apart vacuum vents operably secured to the boundary of the chamber and in pneumatic communication with said vacuum source.

7. The unbound powder removal system for a three-dimensional object fabricator of claim 1, further including an air vent operably secured to the boundary of said chamber and in pneumatic communication with an air source.

8. The unbound powder removal system for a three-dimensional object fabricator of claim 7, wherein said air vent is operably secured to a wall of the chamber and said vacuum vent is operably secured to a floor of the chamber.

9. The unbound powder removal system for a three-dimensional object fabricator of claim 7, wherein said air vent is operably secured to a floor of the chamber and said vacuum vent is operably secured to a wall of the chamber.

10. The unbound powder removal system for a three-dimensional object fabricator of claim 7, further including a lid removably secured to the chamber.

11. The unbound powder removal system for a three-dimensional object fabricator of claim 10, wherein said air source is operational only when said lid is operably secured to said chamber.

12. The unbound powder removal system for a three-dimensional object fabricator of claim 7, further including a plurality of spaced apart air vents operably secured to the boundary of said chamber and in pneumatic communication with said air source.

13. The unbound powder removal system for a three-dimensional object fabricator of claim 7, wherein said air vent has an opened position wherein said air vent is in pneumatic communication with the air source, and a closed position wherein said air vent is pneumatically isolated from the air source

14. The unbound powder removal system for a three-dimensional object fabricator of claim 1, further including an unbound powder storage chamber having an access door to allow removal of unbound powder inside the unbound powder storage chamber.

15. The unbound powder removal system for a three-dimensional object fabricator of claim 1, wherein said three-dimensional object fabricator is an inkjet object fabricator.

16. The unbound powder removal system for a three-dimensional object fabricator of claim 1, wherein said three-dimensional object fabricator is a laser sintering object fabricator.

17. The unbound powder removal system for a three-dimensional object fabricator of claim 1, further including:

a source of pressurized air in pneumatic communication with the vent; and

,

a switch for switching between delivering pressurized air to the chamber through the vent from the pressurized air source and removing unbound powder from the chamber to the vacuum system through the vent.

18. The unbound powder removal system for a three-dimensional object fabricator of claim 17, wherein said the size of said vent is larger when operably secured to the vacuum system than when operably secured to the source of pressurized air.

19. The unbound powder removal system for a three-dimensional object fabricator of claim 17, further including:

a second vent in pneumatic communication with said vacuum system and said source of pressurized air; and

,

a second switch for switching between delivering pressurized air to the chamber through the second vent from the pressurized air source and removing unbound powder from the chamber to the vacuum system through the second vent.

20. The unbound powder removal system for a three-dimensional object fabricator of claim 19, wherein said first switch is positioned to deliver pressurized air to the chamber when said second switch is positioned to remove unbound powder from the chamber to the vacuum system.

21. The unbound powder removal system for a three-dimensional object fabricator of claim 20, wherein said first switch is positioned to remove unbound powder from the chamber to the vacuum system when said second switch is positioned to deliver pressurized air to the chamber from said pressurized air source.

22. The unbound powder removal system for a three-dimensional object fabricator of claim 17, further including a vent regulator operably secured to the vent for modulating the size of the vent.

23. The unbound powder removal system for a three-dimensional object fabricator of claim 22, wherein said vent regulator is a disk having a plurality of different sized openings therein, said disk operably secured to the vent such that one opening of said plurality of openings aligns with the vent to define a size of the vent.

24. A three-dimensional object fabricator having:

a source chamber for receiving unbound powder therein;

a building chamber having a boundary and an upper edge;

a carriage movable along a horizontal plane over the source and building chambers;

an unbound powder mover operably secured to the carriage to move unbound powder from the source chamber to the building chamber thereby forming a layer of unbound powder in the building chamber;

a bonding fluid ejector in fluid communication with a source of bonding fluid, said bonding fluid ejector operably secured to and movable along a longitudinal length of the carriage such that the bonding fluid ejector is positionable on the horizontal plane adjacent to the building chamber, the bonding fluid bonding a region of the layer of unbound powder in the building chamber to form a region of bound powder.

an unbound powder removal system operably secured to the boundary of the building chamber such that unbound powder may be removed from the chamber after the region of bound powder is formed in the building chamber.

25. The three-dimensional object fabricator of claim 24, wherein said unbound powder removal system includes:

a vacuum vent operably secured to the chamber and in pneumatic communication with a vacuum source; and

,

an air vent operably secured to the chamber and in pneumatic communication with an air source.

26. The three-dimensional object fabricator of claim 24, further including:

a plurality of spaced apart vacuum vents operably secured to the chamber and in communication with the vacuum source; and

,

a plurality of spaced apart air vents operably secured to the chamber and in communication with the air source.

27. The three-dimensional object fabricator of claim 26, wherein said plurality of spaced apart vacuum vents are operably secured to a floor of the chamber and said plurality of spaced apart air vents are operably secured to at least one side wall of the chamber.

28. The three-dimensional object fabricator of claim 26, wherein said plurality of spaced-apart vacuum vents are operably secured to at least one side wall of the chamber, and said plurality of spaced apart air vents are operably secured to a floor of the chamber.

29. The three-dimensional object fabricator of claim 24, further including a lid detachably secured to the chamber

30. The three-dimensional object fabricator of claim 29, wherein said unbound powder removal system operates only when said lid is detachably secured to said chamber.

31. A method for producing an object using a three-dimensional object fabricator that fabricates objects by bonding regions of unbounded powder in a chamber of unbound powder with an unbound powder removal system operably secured to the chamber, said method comprising the steps of:

operating the three-dimensional object fabricator to produce the object in the chamber of unbound powder;

covering the chamber of unbound powder with a lid;

activating the unbound powder removal system such that unbound powder in the chamber is removed from the chamber while the object remains within the chamber.

32. The method of claim 31, wherein activating the unbound powder removal system includes operating a vacuum source in pneumatic communication with vacuum vents in the chamber.

33. The method of claim 32, wherein activating the unbound powder removal system further includes operating an air source in pneumatic communication with air vents in the chamber.

34. The method with an unbound powder removal system operably secured to the chamber of claim 32, further including the step of operating a vibration generator to loosen regions of unbound powder in the chamber.

35. The method of claim 32, wherein said operating the three-dimensional object fabricator to produce the object in the chamber of unbound powder step includes operating an inkjet printhead to selectively deposit a binder fluid over at least one region of the unbound powder.

36. The method of claim 32, wherein said operating the three-dimensional object fabricator to produce the object in the chamber of unbound powder includes laser sintering the unbound powder.

37. A three-dimensional object fabricator having:

a frame;

a chamber for depositing a layer of unbound powder therein;

means operably secured to the frame for delivering unbound powder to the chamber;

means for selectively binding a region of the layer of unbound powder thereby forming a region of bound powder; and

,

means operably secured to the chamber for removing unbound powder from the chamber while the region of bound powder remains within the chamber.

38. The three-dimensional object fabricator of claim 37, further including means for collecting unbound powder removed from the chamber.