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:
- supplying a core reinforced filament having a matrix material impregnating reinforcing strands aligned along the filament;
- supplying a fill material separately from the core reinforced filament;
- depositing the core reinforced filament within a first region formed in a radially outward portion of a layer of a part;
- applying pressure with a heated nozzle tip to continuously melt and compact the core reinforced filament as the core reinforced filament is fused into the layer of the part;
- and
- depositing the fill material within a second region formed in a portion of the layer that is radially inward from the first region.
A method for manufacturing a part, the method comprising:
- supplying a core reinforced filament having a matrix material impregnating reinforcing strands aligned along the filament;
- supplying a fill material separately from the core reinforced filament;
- depositing the core reinforced filament within a first region formed in a radially outward portion of a layer of a part;
- applying pressure with a heated nozzle tip to continuously melt and compact the core reinforced filament as the core reinforced filament is fused into the layer of the part;
- terminating the reinforcing region by cutting the core reinforced filament at a temperature less than a solidification temperature of the matrix material;
- and
- depositing the fill material within a second region formed in a portion of the layer that is radially inward from the first region.
Dependencies are inferred from the claim text.