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US 2021/0299941 A1Published application
Printed Hollow Bodies and Systems and Methods for Printing Hollow Bodies
AssigneeScience Applications International Corporation
InventorMatthew L. Peterson
Life of this patent
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Abstract
Systems and methods for 3D printing hollow bodies, such as bodies having an exterior cylindrical shape with a hollow interior, are described. Such systems and methods utilize rotatable hollow print base supports having an interior size and/or shape that matches the desired exterior shape of the final printed structure. The printed bodies, methods, and systems enable printing of the desired hollow printed body from the outside-to-inside. They also allow easy production, customization, and modification of internal structures within the printed hollow body.
Claims20
A printed structure, comprising:
- a first printed layer forming an exterior surface and a first interior surface opposite the exterior surface, wherein the first printed layer includes a first plurality of extruded lines of print material that together form a first enclosed hollow portion that extends continuously for 360 degrees around and thereby defines the first interior surface;
- a second printed layer printed onto and at least partially covering the first interior surface, wherein the second printed layer includes a second plurality of extruded lines of print material that together form a second enclosed hollow portion at least partially located in the first enclosed hollow portion, wherein the second enclosed hollow portion extends continuously for 360 degrees to completely cover at least a portion of the first interior surface within the first enclosed hollow portion, and wherein the second printed layer forms a second interior surface;
- and
- a third printed layer printed onto and at least partially covering the second interior surface, wherein the third printed layer includes a third plurality of extruded lines of print material that together form a third enclosed hollow portion at least partially located in the second enclosed hollow portion, wherein the third enclosed hollow portion extends continuously for 360 degrees to completely cover at least a portion of the second interior surface within the second enclosed hollow portion, and wherein the third printed layer forms a third interior surface.
1 more element
A method of printing, comprising:
- placing a print head including a print nozzle within an interior of a hollow mandrel;
- positioning the print nozzle at a location adjacent a surface located within the interior of the hollow mandrel;
- dispensing print media material through the print nozzle onto the surface at the location;
- rotating the hollow mandrel about a rotational axis;
- moving the print head in a first direction substantially parallel to the rotational axis, wherein at least one of the steps of rotating the hollow mandrel and moving the print head in the first direction occurs while the print media material is being dispensed;
- and
- moving the print head in a second direction substantially perpendicular to and away from the surface onto which the print media material is being dispensed.
4 more elements
A method of printing a hollow body, comprising:
- placing a print head including a print nozzle within an interior of a hollow mandrel, the hollow mandrel including an exterior surface and an interior surface opposite the exterior surface, the interior surface defining the interior of the hollow mandrel;
- forming a first printed layer of the hollow body, including the steps of:
- (a) positioning the print nozzle at a location adjacent the interior surface of the hollow mandrel;
- (b) dispensing print media material through the print nozzle onto the interior surface at the location;
- (c) moving the print head along the interior surface;
- and
- (d) rotating the hollow mandrel, wherein at least one of the steps of moving the print head and rotating the hollow mandrel occurs while print media material is being dispensed onto the interior surface,
- wherein the step of forming the first printed layer forms an exterior surface of the hollow body positioned in contact with the interior surface of the hollow mandrel, wherein the first printed layer includes an interior surface, and wherein the first printed layer extends continuously around 360 degrees of the interior surface of the hollow mandrel;
- moving the print head in a direction away from a print media material deposit location at the interior surface of the first printed layer;
- forming a second printed layer of the hollow body, including the steps of:
- (a) positioning the print nozzle at a location adjacent the interior surface of the first printed layer;
- (b) dispensing print media material through the print nozzle onto the interior surface of the first printed layer at the location adjacent the interior surface of the first printed layer;
- (c) moving the print head in a direction along the interior surface of the first printed layer;
- and
- (d) rotating the hollow mandrel, wherein, when forming the second printed layer, at least one of these steps of moving the print head and rotating the hollow mandrel occurs while the print media material is being dispensed onto the interior surface of the first printed layer,
- wherein the step of forming the second printed layer forms the second printer layer in contact with the interior surface of the first printed layer, wherein the second printed layer includes an interior surface, and wherein the second printed layer extends continuously around 360 degrees of the interior surface of the first printed layer.
13 more elements
Dependencies are inferred from the claim text.