Multiple powder delivery for selective laser sintering

Details Multiple powder delivery for selective laser sintering Multiple powder delivery for selective laser sintering

B - Operations, Transporting

23

K

B23K 26/00 (2006.01) B22F 3/00 (2006.01) B29C 67/00 (2006.01)

Patent

CA 2123105

2123105 9308928 PCTABS00021 An apparatus and method for producing parts by fusing selected portions of a powder layer at a target area, including the systems for delivering the powder to the target area. Multiple powder pistons (20) are included in the apparatus, each lifts a volume of powder above a surface (22) in an alternating manner relative to one another. Powder delivery begins by the lifting of a volume of powder at a first location on one side of the target area. A counter-rotating roller (28) moves across the lifted powder, distributes it over the target area, and rests beyond a second powder lifting location. Portions of the powder layer are then fused at the target area according to a cross-section of the part to be produced, and is followed by lowering a part cylinder (6) at the target area in order to accept the next layer of powder.

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