SELECTIVE DEPOSITING OF POWDER IN ADDITIVE MANUFACTURING
First Claim
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1. An additive manufacturing system, comprising:
- a dispenser to deliver a plurality of successive layers of powder over a support, the plurality of successive layers including a bottom layer deposited on the support and remaining layers each deposited on an underlying layer of fused powder;
an electron source to impart a spatially controllable electrostatic charge to a surface;
an actuator configured to move the surface relative to the support such that the spatially controllable electrostatic charge on the surface causes removal of a corresponding portion of an outermost layer of powder on the support; and
an energy source to fuse at least some of the outermost layer of powder.
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Abstract
A method of additive manufacturing include delivering at least one layer by either depositing a uniform layer of powder on a support and then removing a portion of the layer with a roller with a surface having spatially controlled electrostatic charge, or by depositing powder onto the surface of the roller and moving the roller relative to a support such that the spatially controllable electrostatic charge on the surface of the roller causes transfer of a corresponding portion of the powder from the roller onto the support or an underlying layer.
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Citations
20 Claims
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1. An additive manufacturing system, comprising:
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a dispenser to deliver a plurality of successive layers of powder over a support, the plurality of successive layers including a bottom layer deposited on the support and remaining layers each deposited on an underlying layer of fused powder; an electron source to impart a spatially controllable electrostatic charge to a surface; an actuator configured to move the surface relative to the support such that the spatially controllable electrostatic charge on the surface causes removal of a corresponding portion of an outermost layer of powder on the support; and an energy source to fuse at least some of the outermost layer of powder. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An additive manufacturing system, comprising:
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a dispenser to deliver a plurality of successive layers of powder over a support, the plurality of successive layers including a bottom layer deposited on the support and remaining layers each deposited on an underlying layer of fused powder, wherein the dispenser includes a reservoir for a powder, a surface to receive the powder from the reservoir; an electron source to impart a spatially controllable electrostatic charge to the surface, and an actuator configured to move the surface relative to the support such that the spatially controllable electrostatic charge on the surface causes transfer of a corresponding portion of the powder from the roller onto the support or the underlying layer of fused powder to provide an outermost layer of powder on the support; and an energy source to fuse at least some of the outermost layer of powder. - View Dependent Claims (9, 10, 11, 12)
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13. A method of additive manufacturing a part, comprising:
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delivering a plurality of successive layers of powder over a support, wherein delivering at least one layer includes depositing a uniform layer of powder on a support, imparting a spatially controllable electrostatic charge on a surface, and moving the surface relative to the support such that the spatially controllable electrostatic charge on the surface of the roller causes removal of a corresponding portion of an outermost layer of powder on the support; and fusing at least a portion of the outermost layer of powder after removal of the portion. - View Dependent Claims (14, 15, 16)
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17. A method of additive manufacturing of a part, comprising:
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delivering a plurality of successive layers of powder over a support, wherein delivering at least one layer includes imparting a spatially controllable electrostatic charge along a surface, depositing powder onto the surface, and moving the surface relative to a support such that the spatially controllable electrostatic charge on the surface causes transfer of a corresponding portion of the powder from the surface onto the support or an underlying layer of fused powder to provide an outermost layer of powder on the support; and fusing at least a portion of the outermost layer of powder after transfer of the portion. - View Dependent Claims (18, 19, 20)
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Specification