US 11,654,626 B2
Additive manufacturing
Arthur H. Barnes, Vancouver, WA (US); Wesley R. Schalk, Vancouver, WA (US); and Matthew A. Shepherd, Vancouver, WA (US)
Assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
Filed by HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
Filed on Mar. 12, 2021, as Appl. No. 17/200,406.
Application 17/200,406 is a division of application No. 16/075,430, granted, now 10,981,331, previously published as PCT/US2016/057730, filed on Oct. 19, 2016.
Prior Publication US 2021/0197461 A1, Jul. 1, 2021
Int. Cl. B29C 64/236 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B29C 64/165 (2017.01); B29C 64/264 (2017.01); B29C 64/205 (2017.01); B29C 64/227 (2017.01); B29C 64/386 (2017.01); B29C 64/209 (2017.01); B33Y 50/02 (2015.01)
CPC B29C 64/236 (2017.08) [B29C 64/165 (2017.08); B29C 64/205 (2017.08); B29C 64/209 (2017.08); B29C 64/227 (2017.08); B29C 64/264 (2017.08); B29C 64/386 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12)] 14 Claims
OG exemplary drawing
 
1. A fusing system for an additive manufacturing machine, comprising:
a first carriage carrying a layering device to layer build material over a work area and a fusing lamp to irradiate build material in the work area with a fusing light;
a second carriage carrying an agent dispenser to dispense a fusing agent;
the first carriage and the second carriage movable back and forth over the work area along the same line of motion so that the first carriage follows the second carriage in a first direction and the second carriage follows the first carriage in a second direction opposite the first direction; and
a controller operatively connected to the first carriage, the fusing lamp, the second carriage, and the agent dispenser, the controller including processor executable instructions to:
while moving the first carriage over the work area in the first direction in a first pass, layer build material over an object structure to form a layer of build material;
while moving the first carriage and the second carriage over the work area in the second direction in a second pass, dispense a first fusing agent on to build material in the layer with the agent dispenser;
while moving the second carriage and the first carriage over the work area in the first direction in a third pass, dispense a second fusing agent the same as or different from the first fusing agent on to build material in the layer with the agent dispenser and then irradiate build material in the layer with the fusing lamp; and
while moving the first carriage over the work area in the second direction in a fourth pass, irradiate build material in the layer with the fusing lamp.