DRAW CONTROL FOR EXTRUSION-BASED ADDITIVE MANUFACTURING SYSTEMS
First Claim
Patent Images
1. A method for improving part quality for a printed three-dimensional part, the method comprising:
- providing a print head retained by an extrusion-based additive manufacturing system, the print head comprising a nozzle; and
moving the nozzle along a substantially linear segment of a tool path at a tip height above a previous layer of the three-dimensional part while extruding a flowable material;
producing an extruded road from the extruded flowable material having a road height above the previous layer, and wherein the tip height ranges from about 150% to about 250% of the road height due at least in part to draw on the extruded road, wherein the printed three-dimensional part is substantially free of surface cresting.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for improving part quality for a printed three-dimensional part, the method comprising moving a print head nozzle along a substantially linear segment of a tool path at a tip height above a previous layer of the three-dimensional part while extruding a flowable material, and producing an extruded road from the extruded flowable material having a road height above the previous layer, where the tip height is greater than the road height due at least in part to draw on the extruded road.
-
Citations
20 Claims
-
1. A method for improving part quality for a printed three-dimensional part, the method comprising:
-
providing a print head retained by an extrusion-based additive manufacturing system, the print head comprising a nozzle; and moving the nozzle along a substantially linear segment of a tool path at a tip height above a previous layer of the three-dimensional part while extruding a flowable material; producing an extruded road from the extruded flowable material having a road height above the previous layer, and wherein the tip height ranges from about 150% to about 250% of the road height due at least in part to draw on the extruded road, wherein the printed three-dimensional part is substantially free of surface cresting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for improving part quality for a printed three-dimensional part, the method comprising:
-
providing a print head retained by the extrusion-based additive manufacturing system, the print head comprising a nozzle; and moving the nozzle along a tool path at a first tip height above a previous layer of the three-dimensional part; extruding a flowable material from the nozzle moving at the first tip height to produce a first portion of an extruded road having a first amount of draw; lowering the nozzle from the first tip height to a second tip height above the previous layer; moving the nozzle along the tool path at the second tip height; extruding the flowable material from the nozzle moving at the second tip height to produce a second portion of the extruded road having a second amount of draw than the first amount of draw or substantially no draw. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for improving part quality for a printed three-dimensional part, the method comprising:
-
providing a print head retained by an extrusion-based additive manufacturing system, the print head comprising a nozzle; and moving the nozzle along a tool path above a previous layer of the three-dimensional part; extruding a flowable material from the moving nozzle to produce an extruded road; sensing draw levels of the extruded road; and adjusting at least one extrusion setting based on the sensed draw levels, wherein the at least one extrusion setting is selected from the group consisting of a height of the moving nozzle, a velocity of the moving nozzle, and a volumetric flow rate of the flowable material extruded from the nozzle. - View Dependent Claims (18, 19, 20)
-
Specification