Method and Apparatus for Three-Dimensional Additive Manufacturing with a High Energy High Power Ultrafast Laser
US-2016067778-A1 · Mar 10, 2016 · US
Powder removal
US10220422B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10220422-B2 |
| Application number | US-201514924046-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 27, 2015 |
| Priority date | Oct 27, 2015 |
| Publication date | Mar 5, 2019 |
| Grant date | Mar 5, 2019 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A method includes issuing a state change fluid into an internal passage of an additively manufactured article and causing the state change fluid to change from a first state having a first viscosity to a second state that is either solid or has a second viscosity that is higher than the first viscosity within the internal passage. The method can also include causing the state change fluid to change back from the second state to the first state and flushing the state change fluid from the internal passage to remove residual powder from the additively manufactured article.
First claim
Opening claim text (preview).
What is claimed is: 1. A method, comprising: filling an internal passage of an additively manufactured article with a state change fluid; and causing all of the state change fluid to change from a first state having a first viscosity to a second state that is either solid or has a second viscosity that is higher than the first viscosity within the internal passage; causing the state change fluid to change back from the second state to the first state; and removing residual powder from the additively manufactured article by flushing the state change fluid from the internal passage. 2. The method of claim 1 , further comprising applying vibration to the additively manufactured article while the state change fluid is in the second state. 3. The method of claim 2 , wherein the vibration is ultrasonic vibration. 4. The method of claim 1 , wherein causing the state change fluid to change from the first state to the second state includes applying heat to the state change fluid. 5. The method of claim 4 , wherein the state change fluid includes poly(N-isopropylacrylamide). 6. The method of claim 1 , wherein causing the state change fluid to change from the first state to the second state includes cooling the state change fluid. 7. The method of claim 6 , wherein the state change fluid includes an ionic liquid that is crystalline at room temperature and melts to freely flow above room temperature. 8. The method of claim 7 , wherein the ionic liquid includes [bmim]NTf 2 . 9. The method of claim 7 , further comprising heating the ionic liquid to change the ionic liquid from the second state to the first state before inputting the ionic liquid into the internal passage. 10. The method of claim 1 , wherein causing the state change fluid to change from the first state to the second state includes applying a pressure or force to the state change fluid. 11. The method of claim 1 , wherein issuing the state change fluid includes applying a pressure to the state change fluid. 12. The method of claim 11 , wherein causing the state change fluid to change from the first state to the second state includes removing an applied pressure or reducing pressure to the state change fluid. 13. The method of claim 12 , wherein the state change fluid includes a non-Newtonian fluid that flows more freely with higher pressure. 14. The method of claim 13 , wherein the state change fluid includes a clay suspension.
Assignees
Inventors
Classifications
Cleaning or washing · CPC title
Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title
about an axis substantially perpendicular to the conveying direction · CPC title
- B08B3/12Primary
by sonic or ultrasonic vibrations · CPC title
Cleaning hollow articles by methods or apparatus specially adapted thereto · CPC title
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Frequently asked questions
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- What does patent US10220422B2 cover?
- A method includes issuing a state change fluid into an internal passage of an additively manufactured article and causing the state change fluid to change from a first state having a first viscosity to a second state that is either solid or has a second viscosity that is higher than the first viscosity within the internal passage. The method can also include causing the state change fluid to ch…
- Who is the assignee on this patent?
- Hamilton Sundstrand Corp
- What technology area does this patent fall under?
- Primary CPC classification B08B3/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 05 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).