Radiation method for additive manufacturing
AssigneeFreemelt AB
InventorUlric Ljungblad
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Abstract
A method for manufacturing a three-dimensional object by solidifying selected areas of consecutive powder layers is provided. At least one electron beam successively irradiates predetermined sections of each powder layer by moving an interaction region in which the electron beam interacts with the powder layer. Electromagnetic radiation from a radiation source is directed onto the powder layer to reduce local electrostatic charging in the interaction region. In this way, levitation and scattering of charged powder will be avoided.
Claims16
A method for manufacturing a three-dimensional object by solidifying selected areas of consecutive powder layers, where at least one electron beam successively irradiates predetermined sections of each of the powder layers by moving an interaction region in which the at least one electron beam interacts with the powder layers, and wherein electromagnetic radiation from a radiation source is directed onto the powder layers to reduce electrostatic charge in the interaction region by exciting and removing electrons from the powder layers, thereby causing photoeletron emission from the interaction region.
Dependencies are inferred from the claim text.