IP Library › Granted Patent US 12,589,547
Granted Patent B2
US 12,589,547 · App. 18/630,010 · Granted Mar 31, 2026

Three dimensional printing of composite reinforced structures

Inventors: Gregory Thomas Mark (Newton, MA); Antoni S. Gozdz (Stow, MA)
Assignee: MARKFORGED, INC
B29C64/118B29C70/20B33Y10/00B33Y70/00B29K2077/00B29K2105/106B29K2307/04
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Quick Facts
Patent No.
US 12,589,547
App. No.
18/630,010
Granted
Mar 31, 2026
Kind
B2
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 a 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.

Claims (13)

1 . A three-dimensional printer, comprising:

a first co-extrusion die comprising a first opening for a continuous core filament and a second opening for a first matrix material, the first co-extrusion die constructed and arranged to apply the first matrix material as coating on the continuous core filament to produce a first matrix-coated continuous core filament;

a first exit die constructed and arranged to pass the first matrix-coated continuous core filament;

a second co-extrusion die comprising a first opening adapted to receive the first matrix-coated continuous core filament and a second opening for a second matrix material, the second coextrusion die adapted to coat the first matrix-coated continuous core filament in the second matrix material to produce a double-coated continuous core filament;

a second exit die constructed and arranged to pass the double-coated continuous core filament; and

a first set of dispersion rollers disposed upstream of the first co-extrusion die.

2 . The printer of claim 1 , further comprising a cooling element disposed between the first co-extrusion die and the second co-extrusion die.

3 . The printer of claim 1 , further comprising a cooling tube operatively coupled to the cooling element and dimensioned to receive the first matrix-coated continuous core filament.

4 . The printer of claim 3 , wherein the first exit die is coupled to an entrance of the cooling tube.

5 . The printer of claim 3 , further comprising a forming die coupled to an entrance of the cooling tube.

6 . The printer of claim 1 , further comprising a second set of dispersion rollers disposed at an exit of the first co-extrusion die.

7 . The printer of claim 1 , wherein the first matrix material and the second matrix material are a same material.

8 . The printer of claim 1 , wherein the first matrix material and the second matrix material are a different material.

Assignments (2)
SECURITY INTEREST Recorded Dec 4, 2024
From: MARKFORGED, INC.
To: CONTINUOUS COMPOSITES INC.
Reel/Frame 069508/0868 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 9, 2024
From: MARK, GREGORY THOMAS; GOZDZ, ANTONI S.
To: MARKFORGED, INC.
Reel/Frame 067041/0633 →
Continuity (18)
Continuation 17477102 · Sep 16, 2021
Continuation 14942676 · Nov 16, 2015
Continuation 14575412 · Dec 18, 2014
Continuation In Part 14333947 · Jul 17, 2014
Continuation In Part 14297437 · Jun 5, 2014
Continuation In Part 14222318 · Mar 21, 2014
Continuation In Part 14222318 · Mar 21, 2014
Provisional Application 61907431 · Nov 22, 2013
Provisional Application 61902256 · Nov 10, 2013
Provisional Application 61883440 · Sep 27, 2013
Provisional Application 61881946 · Sep 24, 2013
Provisional Application 61880129 · Sep 19, 2013
Provisional Application 61878029 · Sep 15, 2013
Provisional Application 61847113 · Jul 17, 2013
Provisional Application 61831600 · Jun 5, 2013
Provisional Application 61815531 · Apr 24, 2013
Provisional Application 61804235 · Mar 22, 2013
Related Publication 20240399653A1 · Dec 5, 2024
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