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US 11,148,409 B2Granted
Three dimensional printing of composite reinforced structures
AssigneeMarkforged, Inc.
InventorsGregory Thomas Mark, Antoni S. Gozdz
Life of this patent
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Abstract
Various embodiments related to three dimensional printers, and reinforced filaments, and their methods of use are described. In one embodiment, a void free reinforced filament is fed into an conduit nozzle. The reinforced filament includes a core, which may be continuous or semi-continuous, and a matrix material surrounding the core. The reinforced filament is heated to a temperature greater than a melting temperature of the matrix material and less than a melting temperature of the core prior to drag the filament from the conduit nozzle.
Claims18
A method for manufacturing a part, the method comprising:
- feeding a filament into a heated extrusion nozzle, the filament comprising a multifilament core and a matrix material surrounding the multifilament core, the multifilament core including at least one axial fiber strand extending within the matrix material;
- cutting the filament at a location upstream from an outlet of the heated extrusion nozzle;
- and
- rethreading an upstream portion of the cut filament through the location.
1 more element
Dependencies are inferred from the claim text.