Additive manufacturing spatter shielding

1. A spatter protection system for an additive manufacturing machine, comprising:

a sheet configured to be disposed over a build area of the additive manufacturing machine, wherein the sheet includes an aperture configured to allow a spatter from the build area to eject through the aperture during energy application and to land on a back side of the sheet to prevent the spatter from landing on the build area;

a motive system supporting the sheet and configured to move the sheet to locate the aperture over an energy application area, wherein the motive system includes a first roller and a second roller, wherein the sheet is rolled around each roller at an end thereof, wherein the first roller and second roller are configured to allow the aperture to be moved in a first axis.

2. The system of claim 1 , wherein the motive system is configured to track an energy application spot such that an energy beam passes through the aperture without contacting the sheet.

3. The system of claim 1 , wherein at least the first roller includes a motor configured to wind or unwind the sheet therefrom.

4. The system of claim 3 , wherein the second roller is a slave configured to wind or unwind in response the first roller unwinding or winding, respectively.

5. The system of claim 4 , the motive system includes a rod for each roller, wherein each roller is connected to a respective rod to be linearly actuated along the rod to move the aperture in a second axis perpendicular to the first axis.

6. The system of claim 5 , further comprising one or more actuators connected to at least one rod, wherein the one or more actuators are configured to move each rod to linearly actuate a respective roller in the second axis.

7. The system of claim 6 , further comprising a controller configured to control at least the first roller and the one or more actuators to locate the aperture over an energy application spot to allow spatter to eject through the aperture.

8. The system of claim 1 , wherein the aperture is elliptical.

9. The system of claim 8 , wherein the aperture is circular.

10. The system of claim 1 , wherein the sheet is a fabric, a polymer, or a sheet metal.

11. The system of claim 10 , wherein the sheet is Mylar, Teflon, stainless steel, aluminum, or tape.

12. The system of claim 11 , wherein the sheet includes one or more additional apertures.

13. An additive manufacturing system, comprising:

an energy applicator configured to apply energy to a build area;

a build area; and

a spatter protection system for an additive manufacturing machine, comprising:

a sheet configured to be disposed over a build area of the additive manufacturing machine, wherein the sheet includes an aperture configured to allow a spatter from the build area to eject through the aperture during energy application and to land on a back side of the sheet to prevent the spatter from landing on the build area; and

a motive system supporting the sheet and configured to move the sheet to locate the aperture over an energy application area, wherein the motive system includes a first roller and a second roller, wherein the sheet is rolled around each roller at an end thereof, wherein the first roller and second roller are configured to allow the aperture to be moved in a first axis.

14. The system of claim 13 , further comprising a housing configured to enclose the build area to provide an isolated atmosphere, wherein the spatter protection system is disposed within the housing to be contained within an isolated atmosphere.

15. The system of claim 14 , wherein the motive system is configured to track an energy application spot such that an energy beam passes through the aperture without contacting the sheet.

16. The system of claim 13 , wherein at least the first roller includes a motor configured to wind or unwind the sheet therefrom.

17. The system of claim 16 , wherein the second roller is a slave configured to wind or unwind in response the first roller unwinding or winding, respectively.

18. A method, comprising:

locating an aperture in a sheet over an energy application spot during an additive manufacturing process to allow spatter to eject through the aperture and land on a back side of the sheet, wherein locating the aperture in the sheet includes, rolling the sheet around a first roller and a second roller and an end thereof, wherein the first roller and second roller are configured to allow the aperture to be moved in a first axis.