Support structure removal system

• US 10,016,945 B2
• Filed: 02/23/2016
• Issued: 07/10/2018
• Est. Priority Date: 09/23/2011
• Status: Active Grant

• Current Assignee: Stratasys Incorporated
• Original Assignee: Stratasys Incorporated
• Inventors: Swanson, William J., Mannella, Dominic F., Schloesser, Ronald G.
• Primary Examiner(s): GOLIGHTLY, ERIC WAYNE
• Application Number:
  US15/051,068
• Publication Number:
  US 20160167313A1
• Time in Patent Office: 868 Days
• Field of Search: None
• CPC Class Codes: B08B 3/104 using propellers
• CPC Class Codes: B29C 64/35 Cleaning
• CPC Class Codes: B29C 64/40 Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
• 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: B33Y 40/20 Post-treatment, e.g. curing, coating or polishing

Abstract

A support structure removal system comprising a vessel and a second component. The vessel comprises a vessel body, a porous floor configured to retain a three-dimensional part, and an impeller rotatably mounted below the porous floor. The second component comprises a surface configured to operably receive the vessel, and a rotation-inducing assembly located below the surface, where the rotation-inducing assembly is configured to rotate the impeller with magnetic fields when the vessel is received on the surface of the second component to agitate and direct flows of an aqueous fluid through the porous floor.

Claims

1. A support structure removal system comprising:

removal tank having an interior volume for holding a support removal fluid and configured to receive two or more three-dimensional parts, each three-dimensional part having a support structure connected thereto;

an alignment system comprising two or more spaced apart alignment mechanisms within the removal tank;

two or more removable porous vessels, wherein in each vessel is configured to receive one or more three-dimensional parts, each three-dimensional part having a support structure;

an agitation system comprising two or more spaced apart agitation mechanisms independently operable of one another; and

wherein the two or more alignment mechanisms are configured to align at least one of the two or more porous vessels with one of the two or more agitation mechanisms, wherein the two or more agitation mechanisms are configured to locally agitate the support removal fluid proximate the two or more three-dimensional parts to remove the support structures of the two or more three-dimensional parts independently of one another.

2. The support structure removal system of claim 1, wherein the two or more spaced apart agitation mechanisms each comprise an impeller rotatably secured to the removal tank within the interior volume, wherein each impeller is configured to agitate the support removal fluid for removal of the support structure.

3. The support structure removal system of claim 1, wherein each of the two or more spaced apart agitation mechanisms comprises an impeller rotatably secured to one of the two or more vessels, wherein each impeller is configured to agitate the support removal fluid within the interior region of the vessel.

4. The support structure removal system of claim 2, wherein each of the two or more spaced apart agitation mechanisms further comprises a rotation-inducing assembly located on an exterior surface of the removal tank, wherein each rotation-inducing assembly is configured to generate a rotating magnetic field to rotate each impeller for removal of the support material from at least one three-dimensional part within the tank.

5. The support structure removal system of claim 3, wherein each of the two or more agitation mechanisms further comprises a rotation-inducing assembly located on an exterior surface of the removal tank, wherein each rotation-inducing assembly is configured to generate a rotating magnetic field to rotate each impeller for removal of the support material from at least one of the three-dimensional parts within the vessels.

6. The support structure removal system of claim 1, wherein each of the alignment mechanisms comprises one or more alignment tabs wherein each porous vessel is configured to couple with at least one of the two or more alignment mechanisms to prevent rotational and linear movement of the porous vessel within the tank.

7. The support structure removal system of claim 1, wherein the alignment system further comprises a magnet assembly configured to prevent linear movement of the porous vessels during agitation of the support removal fluid.

8. A method of removing a support structure comprising:

placing two or more three-dimensional parts into two or more porous vessels, each three-dimensional part having a support structure connected thereto, into a removal tank having an interior volume holding a support removal fluid therein, wherein the two or more porous vessels engage an alignment system comprising two or more spaced apart alignment mechanisms within the removal tank to retain the two or more porous vessels in selected locations within the removal tank;

and to align at least one of the two or more porous vessels with an agitation system comprising two or more spaced apart agitation mechanisms independently operable of one another;

activating the agitation system; and

agitating the support removal fluid with the two or more spaced apart agitation mechanism proximate the two or more three-dimensional parts to remove the support structures of the two or more three-dimensional parts independently of one another and at staggered and overlapping times.

9. The method of claim 8, wherein the two or more spaced apart agitation mechanisms each comprise an impeller rotatably secured to the removal tank within the interior volume, and further comprising agitating the support removal fluid for removing the support structures by independently rotating the impellers.

10. The method of claim 8, wherein the two or more spaced apart agitation mechanisms each comprise an impeller rotatably secured to one of the two or more vessels, and further comprising agitating the support removal fluid within the interior region of one of the two or more vessels for removing the support structure from the three-dimensional part therein.

11. The method of claim 9, further comprising generating a rotating magnetic field with a rotation-inducing assembly to rotate each impeller for removal of the support structures from the three-dimensional parts within the tank, wherein the rotation-inducing assembly is located on an exterior surface of the removal tank.

12. The method of claim 10, further comprising generating a rotating magnetic field with a rotation-inducing assembly to rotate each impeller for removal of the support structures from the three-dimensional parts within one of the two or more vessels, wherein the rotation-inducing assembly is located on an exterior surface of the removal tank.

13. The method of claim 8, wherein each of the alignment mechanisms comprises one or more alignment tabs and wherein each porous vessel is configured to couple with at least one of the two or more alignment mechanisms to prevent rotational and linear movement of one or more coupled vessels within the tank.

14. The method of claim 8, wherein the alignment system further comprises a magnet assembly configured to prevent linear movement of the porous vessels during agitation of the support removal fluid.