Methods and apparatus for processing and dispensing material during additive manufacturing
First Claim
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1. A system for additive manufacturing, comprising:
- a nozzle configured to translate along a first axis, a second axis perpendicular to the first axis, and a third axis orthogonal to the first and second axes, wherein the nozzle is operably coupled to;
an extruder having an outlet and including a screw disposed within a barrel; and
a pump having an inlet and an outlet, the inlet being coupled to the extruder, and the outlet being in fluid communication with the nozzle; and
a controller that causes a speed of the pump with respect to a speed of the screw to adjust and thereby apply a target pressure at the outlet of the extruder, wherein the controller is programmed to change the target pressure from a first target pressure stored in a memory of the controller to a second target pressure stored in the memory of the controller.
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Abstract
A system for additive manufacturing includes a nozzle configured to translate along a first axis, a second axis perpendicular to the first axis, and a third axis orthogonal to the first and second axes, wherein the nozzle is operably coupled to: an extruder having an outlet and including a screw disposed within a barrel, and a pump having an inlet and an outlet. The inlet is coupled to the extruder, and the outlet is in fluid communication with the nozzle. The system also includes a controller configured to adjust a speed of the pump with respect to a speed of the screw to apply a target pressure at the outlet of the extruder.
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Citations
20 Claims
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1. A system for additive manufacturing, comprising:
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a nozzle configured to translate along a first axis, a second axis perpendicular to the first axis, and a third axis orthogonal to the first and second axes, wherein the nozzle is operably coupled to; an extruder having an outlet and including a screw disposed within a barrel; and a pump having an inlet and an outlet, the inlet being coupled to the extruder, and the outlet being in fluid communication with the nozzle; and a controller that causes a speed of the pump with respect to a speed of the screw to adjust and thereby apply a target pressure at the outlet of the extruder, wherein the controller is programmed to change the target pressure from a first target pressure stored in a memory of the controller to a second target pressure stored in the memory of the controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for additive manufacturing, comprising:
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a nozzle configured to translate along a first axis, a second axis perpendicular to the first axis, and a third axis orthogonal to the first and second axes, wherein the nozzle is operably coupled to; an extruder including a screw disposed within a barrel; and a pump having an inlet and an outlet, wherein the inlet is coupled to the extruder, and the outlet is downstream of the extruder and in fluid communication with the nozzle; and a controller configured to modify a size of a bead extruded by the nozzle to maintain an approximately constant sized overlap between a plurality of adjacent beads by modifying a ratio of a translation speed of the nozzle and a speed of rotation of the pump. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification