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Recent patent applications related to Markforged Inc. Markforged Inc is listed as an Agent/Assignee. Note: Markforged Inc may have other listings under different names/spellings. We're not affiliated with Markforged Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "M" | Markforged Inc-related inventors


Sintering additively manufactured parts in microwave oven

A method comprising supplying a first brown part and a second brown part, each of the first and second brown parts formed from a material in which more than 50 percent of powder particles of a second powdered metal have a diameter less than 10 microns, in a first mode, loading the first brown part into a fused tube, and ramping a temperature inside the fused tube at greater than 10 degrees c. Per minute but less than 40 degrees c. ... Markforged Inc

Sintering additively manufactured parts in a fluidized bed

According to one aspect, embodiments of the invention provide a method of sintering a brown part article formed from a powdered sinterable material, comprising placing a brown part integrally formed from a first powder having a first sintering temperature in a powder bed within a crucible, the powder bed including a second powder having a second sintering temperature more than 300 degrees c. Higher than the first sintering temperature, agitating the second powder to fill internal cavities of the brown part, continually resisting a weight of an unsupported portion of the brown part with the second powder, sintering the brown part at the first temperature without sintering the second powder to form a sintered part, and removing the sintered part from the powder bed. ... Markforged Inc

Supports for sintering additively manufactured parts

A method comprising depositing, in layers, a shrinking platform formed from a composite including metal particles embedded in a first matrix, depositing shrinking supports of the composite upon the shrinking platform, forming a separation clearance dividing at least one shrinking support into fragments, depositing, from the composite, a part upon the shrinking platform and shrinking supports, depositing a separation material intervening between the part and the shrinking supports, the separation material including a ceramic powder and a second matrix, and forming, from the shrinking platform, shrinking supports, separation material, and part, a portable platform assembly in a green state, wherein the shrinking support is configured to prevent the portable platform assembly from distorting from gravitational force during sintering of the metal particles of the assembly in a brown state, and wherein the ceramic powder of the separation material is configured to separate the shrinking support from the part following sintering.. . ... Markforged Inc

Supports for sintering additively manufactured parts

A method comprising forming a shrinking platform of layers of a composite, the composite including a metal particulate filler in a first matrix, forming a shrinking support of layers of the composite upon the shrinking platform, forming a first release layer of a release material upon the shrinking support, the release material including a ceramic particulate and a second matrix, and forming a part of the composite upon the shrinking support to form a portable assembly from the combined shrinking platform, shrinking support, release layer and part, wherein substantially horizontal portions of the part are vertically supported by the shrinking platform, wherein the first release layer is configured, after sintering, to separate the part from the shrinking support and to allow the part to be readily removed from the shrinking support, and wherein the shrinking support is configured to prevent the part from distorting during sintering.. . ... Markforged Inc

Supports for sintering additively manufactured parts

A method comprising depositing a part from layers of model material including sinterable metal particles and a first binder, the part surrounding a hole, depositing a first support structure from layers of the model material within the hole, depositing a first release layer of a release material above the first support structure and within the hole, the release material including a dispersed ceramic powder and a second binder, depositing a second release layer of a release material below the first support structure and within the hole, and forming a multipiece assembly of the part, the first and second release layers, and the first support structure, wherein, during sintering, the part and first support structure are configured to densify as a whole at a uniform rate, the release material is configured to reduce to a loose ceramic powder, and the first support structure is configured to prevent distortion of the hole.. . ... Markforged Inc

Supports for sintering additively manufactured parts

According to one aspect, embodiments herein provide a method comprising forming a shrinking platform of model material above a build plate, the model material including sinterable metal particles and a first binder, forming a support structure of the model material extending up from the shrinking platform, forming a first portion of the part from successive layers of the model material above the support structure, forming a release layer intervening between a surface of the part and an opposing surface of the support structure or between a surface of the shrinking platform and an opposing surface of the build plate, the release layer including a dispersed ceramic powder and a second binder, and supporting the part, the release layer, and the support structure upon the shrinking platform to form a platform-integrating part assembly, the support structure being configured to prevent the first portion from distorting from gravitational force during sintering.. . ... Markforged Inc

Stress relaxation in additively manufactured parts

To build a part with a deposition-based additive manufacturing system using a polymer-based binder of a composite feedstock, a first tool path of a perimeter contour segment and a second tool path that is parallel and adjacent are deposited in retrograde directions to produce stress-offsetting adjacent paths, where directions of residual stress within the polymer-based binder of the composite are opposite in the stress-offsetting adjacent path.. . ... Markforged Inc

Sintering additively manufactured parts with a densification linking platform

To reduce distortion in an additively manufactured part, a densification linking platform and/or supports of the same composite as the desired part may be printed below the part. After debinding, a resulting shape-retaining brown part assembly is sintered to densify together at a same rate as neighboring metal particles throughout the shape-retaining brown part assembly undergo atomic diffusion. ... Markforged Inc

Additively manufactured parts with debinding acceleration

To build a part with a deposition-based additive manufacturing system with a binder matrix and a sinterable powder, walls of a part, sintering supports, or interconnecting platform are formed with access, distribution or routing channels therein to permit debinding fluid to pass through and/or enter the interior of the same.. . ... Markforged Inc

Additive manufacturing with continuous debinding

In printing a sinterable part using a 3d printing model material including a binder and a ceramic or metal sintering material, a release layer intervenes between support structures and the part, each of the support structures and the part formed of the model material. The release layer includes a spherized or powdered higher melting temperature material—ceramic or high temperature metal for example, optionally deposited with a similar (primary) matrix or binder component to the model material. ... Markforged Inc

Additive manufacturing with heat-flexed material feeding

In additive manufacturing, composite build material filament and release material filament (each a composite of metal/ceramic powder plus binder) are dropped from respective spools to a print head. On the spools and over the drop height, the filaments are heated to a temperature that flexes the filaments but does not soften them to a breaking point, e.g., heated but below a glass transition temperature of a softener (for example, wax) of the binder. ... Markforged Inc

Multilayer fiber reinforcement design for 3d printing

A method comprising receiving a first 3d toolpath defining a fill material curved shell, receiving first 2d toolpaths defining support material flat shells, receiving a second 3d toolpath defining a long fiber composite material curved shell, the long fiber composite material including a filament having a matrix embedding fibers having a length longer than two times a diameter of the filament, actuating a fill material deposition head to trace the first 3d toolpath to deposit the fill material curved shell non-parallel to a printing substrate, actuating a support material deposition head to trace the first 2d toolpaths to deposit support material in a succession of substantially flat shells, and actuating a long fiber deposition head to trace the second 3d toolpath non-parallel to the printing substrate to deposit the long fiber composite material curved shell to enclose at least a portion of the fill material curved shell.. . ... Markforged Inc

Methods for fiber reinforced additive manufacturing

A three-dimensional geometry is received, and sliced into layers. A first anisotropic fill tool path for controlling a three dimensional printer to deposit a substantially anisotropic fill material is generated defining at least part of an interior of a first layer. ... Markforged Inc

Wear resistance in 3d printing of composites

According to at least one aspect, embodiments of the invention provide a method comprising supplying a reinforced axial fiber filament including a matrix material, a plurality of axial fiber strands extending continuously within the matrix material, and a multiplicity of fiber rods between 0.2-10 mm long dispersed throughout the matrix material, at least some of the dispersed fiber rods being oriented transversely to the fiber strands, supplying a composite fill separately from the filament, including a multiplicity of fiber rods between 0.2-10 mm long dispersed throughout the fill, the fiber rods having hardness at least twice that of a matrix of the fill, and depositing the filament within a first region of an outward portion of a part, through a nozzle throat having a thermal conductivity of at least 35 w/m-k adjacent a nozzle tip having a rockwell c hardness of at least c40.. . ... Markforged Inc

11/23/17 / #20170334136

Multilayer fiber reinforcement design for 3d printing

According to at least one aspect, embodiments of the invention provide a 3d printer comprising an anisotropic head that solidifies, along anisotropic toolpaths, fiber swaths having an anisotropic characteristic oriented relative to a trajectory of the anisotropic tool paths, an isotropic head that solidifies, along isotropic toolpaths, a substantially isotropic material, a motorized drive for moving the anisotropic head and a build plate supporting a printed part in at least three degrees of freedom, and a controller configured to control the 3d printer to build the printed part by solidifying the isotropic material along the isotropic tool paths, solidifying the anisotropic material in fiber swaths tracking a non-concentric set of anisotropic tool paths for at least a first sequence of parallel shells, solidifying the anisotropic material in fiber swaths tracking an outer concentric set of anisotropic tool paths for at least a second sequence of parallel shells.. . ... Markforged Inc

11/16/17 / #20170326802

Apparatus for fiber reinforced additive manufacturing

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. ... Markforged Inc

08/17/17 / #20170232674

Wear resistance in 3d printing of composites

A three dimensional printer which prints at using at least one composite material having an inherently abrasive filler or fiber material has a mohs hardness greater than substantially 1, or a knoop/vickers hardness greater than substantially 300 kg/mm2, or a rockwell c hardness at least c30, and where a nozzle tip may contact a top surface of a previously deposited line of material may have a nozzle body includes a material having a thermal conductivity at least 35 w/m-k to conduct heat to the nozzle, and a nozzle throat and/or nozzle tip each include a material having a rockwell c hardness at least c40, to resist wear from sliding contact of the nozzle tip with the previously deposited lines of the material being printed or another previously deposited material, or from the material being printed as it is printed through the nozzle throat.. . ... Markforged Inc

06/22/17 / #20170173868

Continuous and random reinforcement in a 3d printed part

Combined continuous/random fiber reinforced composite filament including a plurality of axial fiber strands extending substantially continuously within a matrix material of the fiber reinforced composite filament as well as a multiplicity of short chopped fiber rods extending at least in part randomly within the same matrix material is 3d printed via a deposition head including a conduit continuously transitioning to a substantially rounded outlet tipped with an ironing lip, which is driven to flatten the fiber reinforced composite filament against previously deposited portions of the part, as the matrix material and included therein a first proportion of the short chopped fiber rods are is flowed interstitially among the axial fiber strands spread by the ironing lip. A second proportion of the short chopped fiber rods is forced against previously deposited portions of the part.. ... Markforged Inc

05/04/17 / #20170120519

Embedding 3d printed fiber reinforcement in molded articles

A reinforced molding is formed having an internal continuous fiber reinforcement preform embedded therein. Continuous reinforcing fiber is deposited in a reinforcement volume to form a continuous fiber reinforcement preform, and the reinforcement preform is then located within a mold of a molding apparatus. ... Markforged Inc

03/30/17 / #20170087632

Molten metal jetting for additive manufacturing

In molten metal jetting, where droplets of metal are jetted to 3d print a part, each layer may be traversed each successive layer with a normalizing grinding wheel or other leveling device such as a layer to level each successive layer, and/or the melt reservoir or printing chamber may be filled with an anoxic gas mix to prevent oxidation.. . ... Markforged Inc

03/09/17 / #20170066187

Three dimensional printing

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 extrusion nozzle. ... Markforged Inc








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