Methods for composite filament fabrication in three dimensional printing
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.
Claims29
A method for additively manufacturing a part, the method comprising:
- receiving a core material including a plurality of reinforcing strands;
- receiving a resin material;
- combining the core material and the resin material to form a reinforced filament to be deposited by a nozzle;
- guiding the reinforced filament to drag through the nozzle;
- moving a cutter together with the nozzle;
- cutting the reinforced filament with the cutter;
- depositing the reinforced filament with reinforcing strands substantially aligned along the deposited reinforced filament;
- and
- applying mechanical pressure by pressing with the nozzle to continuously compact the reinforced filament into a previously added layer of the part as the reinforced filament is fused into the part.
A method for additively manufacturing a part, the method comprising:
- receiving a core material including a plurality of reinforcing strands;
- receiving a resin material;
- combining the core material and the resin to form a reinforced filament to be deposited by a nozzle;
- guiding the reinforced filament to drag through the nozzle;
- moving a cutter together with the nozzle;
- cutting the reinforced filament with the cutter;
- dragging forward the reinforced filament through the nozzle by applying a force at least via the plurality of reinforcing strands;
- depositing the reinforced filament with the plurality of reinforcing strands substantially aligned along the deposited reinforced filament;
- and
- compacting the deposited reinforced filament into a previously added layer of the part.
A method for additively manufacturing a part, the method comprising:
- receiving a core material including a plurality of reinforcing strands;
- receiving a resin material;
- combining the core material and the resin to form a reinforced filament to be deposited by a nozzle;
- guiding the reinforced filament to drag through the nozzle;
- depositing the reinforced filament with reinforcing strands substantially aligned along the deposited reinforced filament;
- applying pressure with the nozzle to continuously compact the reinforced filament into the part as the reinforced filament is fused into the part;
- dragging forward the reinforced filament through the nozzle by applying a force at least via the plurality of reinforcing strands;
- and
- relatively moving the nozzle and the part along at least linear axes and about at least one pivot to permit the nozzle to trace an outer contour of the part.
A method for additively manufacturing a part, the method comprising:
- feeding forward a core material including a plurality of reinforcing strands;
- feeding forward a resin including a thermoplastic resin;
- combining the core material and the resin to form a reinforced filament to be deposited by a nozzle;
- guiding the reinforced filament to drag through the nozzle;
- receiving the reinforced filament at a shearing region moved together with the nozzle;
- shearing the reinforced filament in the shearing region;
- guiding the reinforced filament to drag through the nozzle;
- and
- pressing with mechanical pressure with the nozzle to continuously compact the reinforced filament into a previously added layer of the part as the reinforced filament is fused into the part.
Dependencies are inferred from the claim text.