Vapor smoothing surface finishing system

• US 8,075,300 B2
• Filed: 06/30/2008
• Issued: 12/13/2011
• Est. Priority Date: 06/30/2008
• Status: Active Grant

• Current Assignee: Stratasys Incorporated
• Original Assignee: Stratasys Incorporated
• Inventors: Zinniel, Robert L.
• Primary Examiner(s): Johnson, Christina
• Assistant Examiner(s): LIU, XUE H
• Application Number:
  US12/215,929
• Publication Number:
  US 20090321972A1
• Time in Patent Office: 1,261 Days
• Field of Search: 34 62- 66, 341/45, 34/73, 34/78, 38/778, 38/778.3, 38/778.2
• US Class Current: 425/445
• CPC Class Codes: B29C 59/002 Component parts, details or accessories; Auxiliary operations
• CPC Class Codes: B29C 64/30 Auxiliary operations or equipment
• CPC Class Codes: B29C 71/0009 using liquids, e.g. solvents, swelling agents spectacle cases, e.g. for cleaning contact lenses A45C11/04; disinfecting or sterilising contact lenses A61L12/00, using liquid substances A61L2/20; cleaning involving the use of liquid in general B08B3/00; for hydrating contact lenses B29D11/00067
• CPC Class Codes: B29K 2995/0073 smooth
• CPC Class Codes: B33Y 40/20 Post-treatment, e.g. curing, coating or polishing

Abstract

A system and method is provided for vapor smoothing a rapid manufactured three-dimensional object. A cabinet housing has a sealable interior. A heated vapor chamber in the interior of the cabinet housing contains solvent that is vaporizable to fill the vapor chamber with vapor for smoothing the object when the object is placed in the vapor chamber. A drying chamber is also provided in the interior of the cabinet housing that is separate from the vapor chamber for drying the object when the object is moved from the vapor chamber to the drying chamber.

Claims

1. A system for vapor smoothing a rapid manufactured three-dimensional object, the system comprising:

a housing;

a heatable vapor chamber located within the housing, and configured to contain a solvent that is vaporizable to fill the vapor chamber with vapor that is configured to soften and reflow material of the object while the object is exposed to the vapor, the heatable vapor chamber comprising;

a first cooling component configured to define a first vapor ceiling for the heatable vapor chamber; and

a vapor chamber top opening located above the first vapor ceiling;

a drying chamber located within the interior of the housing and that is separate from the vapor chamber, the drying chamber being located laterally adjacent to the vapor chamber, wherein the drying chamber comprises a drying chamber top opening; and

an interior chamber located within the housing above the vapor chamber and the drying chamber, the interior chamber being accessible to the vapor chamber top opening and to the drying chamber top opening, wherein the interior chamber comprises;

a second cooling component configured to define a second vapor ceiling for the heatable vapor chamber and the drying chamber; and

a interior chamber top opening located above the second vapor ceiling.

2. The system of claim 1, wherein the second cooling component is further configured to at least partially maintain the drying chamber at a temperature below room temperature.

3. The system of claim 1, wherein the first cooling component and the second cooling component each comprise cooling coils.

4. The system of claim 3, further comprising:

a solvent tank located outside the vapor chamber connected to selectively provide solvent to the vapor chamber;

a water separator operable to remove water from condensed solvent on the cooling coils; and

a return line for returning the condensed solvent, having water removed therefrom, to the solvent tank.

5. The system of claim 1, further comprising:

a solvent tank located outside the vapor chamber; and

a transport mechanism configured to selectively provide the solvent from the solvent tank to the vapor chamber.

6. The system of claim 5, wherein the transport mechanism is configured to selectively provide the solvent to the vapor chamber in a manner that maintains a fluid level in the vapor chamber ranging from about 0.63 centimeters to about 1.27 centimeters.

7. The system of claim 5, further comprising a programmable logic controller (PLC) that controls provision of solvent from the solvent tank to the vapor chamber to maintain the fluid volume in the vapor chamber.

8. The system of claim 5, further comprising a cold finger in the vapor chamber operable to condense vapor in the vapor chamber, and a pump configured to return the condensed vapor to the solvent tank from the vapor chamber.

9. The system of claim 1, further comprising a vapor chamber door configured to selectively cover the vapor chamber top opening.

10. The system of claim 1, further comprising an exhaust vent connected to the drying chamber.

11. The system of claim 1, wherein the second cooling component is further configured to at least partially maintain the drying chamber at a temperature at least 40°

F. lower than a temperature of the solvent vapor in the vapor chamber.

12. The system of claim 1, wherein the second cooling component is further configured to at least partially maintain the drying chamber at a temperature of no greater than 50°

F.

13. The system of claim 1, further comprising an interior chamber door configured to selectively cover the interior chamber top opening.

14. A system for vapor smoothing a rapid manufactured three-dimensional object, the system comprising:

a housing;

a vapor chamber located within the housing, the vapor chamber comprising;

at least one heater configured to vaporize a solvent to provide a vapor that is configured to soften and reflow material of the object while the object is exposed to the vapor;

a first cooling component configured to define a first vapor ceiling for the vapor chamber; and

a vapor chamber top opening located above the first vapor ceiling;

a drying chamber located within the housing and that is separate from the vapor chamber, the drying chamber being located laterally adjacent to the vapor chamber, wherein the drying chamber comprises a drying chamber top opening; and

an interior chamber located within the housing above the vapor chamber and the drying chamber, the interior chamber being accessible to the vapor chamber top opening and to the drying chamber top opening, wherein the interior chamber comprises;

a second cooling component configured to define a second vapor ceiling for the vapor chamber and for the drying chamber; and

a interior chamber top opening located above the second vapor ceiling.

15. The system of claim 14, wherein the first cooling component and the second cooling component each comprise cooling coils.

16. The system of claim 15, further comprising:

a solvent tank located outside the vapor chamber connected to selectively provide solvent to the vapor chamber;

a water separator operable to remove water from condensed solvent on the cooling coils; and

a return line for returning the condensed solvent, having water removed therefrom, to the solvent tank.

17. The system of claim 14, further comprising:

a solvent tank located outside the vapor chamber; and

a transport mechanism configured to selectively provide the solvent from the solvent tank to the vapor chamber.

18. The system of claim 14, further comprising a vapor chamber door configured to selectively cover the vapor chamber top opening.

19. The system of claim 14, further comprising an interior chamber door configured to selectively cover the interior chamber top opening.

20. The system of claim 19, further comprising a vapor chamber door configured to selectively cover the vapor chamber top opening.