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    Wear resistance in 3D printing of composites
    11.
    发明授权
    Wear resistance in 3D printing of composites 有权

    公开(公告)号：US10259160B2

    公开(公告)日：2019-04-16

    申请号：US15436216

    申请日：2017-02-17

    Applicant: MARKFORGED, INC.

    Inventor： Gregory Thomas Mark

    IPC: B29C67/00 ,  B29C31/08 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y30/00 ,  B29C31/04 ,  B33Y70/00 ,  B29C64/165 ,  B29C64/20 ,  B29C64/209 ,  B29C64/118 ,  B29K105/12 ,  B29K307/04

    Abstract: 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.

    SUPPORTS FOR SINTERING ADDITIVELY MANUFACTURED PARTS
    12.
    发明申请
    SUPPORTS FOR SINTERING ADDITIVELY MANUFACTURED PARTS 审中-公开

    公开(公告)号：US20190084244A1

    公开(公告)日：2019-03-21

    申请号：US16057730

    申请日：2018-08-07

    Applicant: MARKFORGED, INC.

    Inventor： Gregory Thomas Mark

    IPC: B29C64/40 ,  B29C64/165 ,  B29C31/04 ,  B29C64/141 ,  B29C64/295 ,  B29C64/245 ,  B33Y10/00 ,  B22F3/11 ,  B29K25/00 ,  B29C70/16 ,  B29C64/209 ,  B29C64/118 ,  B29K79/00

    Abstract: 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.

    Footwear fabrication by composite filament 3D printing
    13.
    发明授权
    Footwear fabrication by composite filament 3D printing 有权

    公开(公告)号：US10226103B2

    公开(公告)日：2019-03-12

    申请号：US14988222

    申请日：2016-01-05

    Applicant: MARKFORGED, INC.

    Inventor： Gregory Thomas Mark

    IPC: B29C70/68 ,  B29C70/74 ,  B29D35/00 ,  A43D8/22 ,  A43B17/00 ,  A43B23/02 ,  B33Y10/00 ,  B33Y80/00 ,  B29C64/118 ,  B29C64/106

    Abstract: A footwear insole shape is generated by supplying a core reinforced filament having a matrix material impregnating reinforcing strands aligned along the filament, as well as a fill material separately from the core reinforced filament and depositing at least one shell of fill material within an insole shape upon a print bed. The core reinforced filament is deposited to fuse to the fill material within a first reinforcing region formed with respect to the insole shape. A cutter upstream of the nozzle tip cuts the core reinforced filament, and a remainder of the core reinforced filament is deposited to complete the first reinforcing region. A nozzle tip applies pressure to continuously compact the core reinforced filament toward the insole shape as the core reinforced filament is fused to the fill material.

    MID-PART IN-PROCESS INSPECTION FOR 3D PRINTING
    14.
    发明申请
    MID-PART IN-PROCESS INSPECTION FOR 3D PRINTING 审中-公开

    公开(公告)号：US20190009472A1

    公开(公告)日：2019-01-10

    申请号：US16108870

    申请日：2018-08-22

    Applicant: MARKFORGED, INC.

    Inventor： Gregory Thomas Mark

    IPC: B29C64/386 ,  B33Y50/02 ,  B29C64/393 ,  G05B19/4099 ,  B33Y10/00 ,  B29K105/00

    Abstract: According to one aspect, embodiments herein provide a method for in-process inspection of a 3D printed part with a 3D printer, comprising slicing a three dimensional model to define a plurality of shell volumes, for substantially each shell volume, generating a toolpath for depositing a printing material shell corresponding to the shell volume, transmitting, together with an identification, the toolpaths defining the printing material shells for deposition by a 3D printer, receiving, together with the identification, from the 3D printer a scanned surface profile of a printing material shell, and computing a process inspection including, according to the identification, a comparison between a received scanned surface profile and a toolpath defining a printing material shell.

    SINTERING ADDITIVELY MANUFACTURED PARTS IN MICROWAVE OVEN
    15.
    发明申请
    SINTERING ADDITIVELY MANUFACTURED PARTS IN MICROWAVE OVEN 审中-公开

    公开(公告)号：US20180236546A1

    公开(公告)日：2018-08-23

    申请号：US15961384

    申请日：2018-04-24

    Applicant: MARKFORGED, INC.

    Inventor： Gregory Thomas Mark

    IPC: B22F3/00 ,  B22F1/00 ,  B33Y10/00 ,  B33Y70/00

    Abstract: 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. per minute to a first sintering temperature from 500-700 degrees C., and in a second mode, loading the second brown part into the fused tube, and ramping the temperature inside the fused tube at greater than 10 degrees C. per minute but less than 40 degrees C. per minute to a second sintering tempering temperature from 1000-1200 degrees C.

    ADDITIVE MANUFACTURING WITH HEAT-FLEXED MATERIAL FEEDING
    18.
    发明申请
    ADDITIVE MANUFACTURING WITH HEAT-FLEXED MATERIAL FEEDING 审中-公开

    公开(公告)号：US20180154437A1

    公开(公告)日：2018-06-07

    申请号：US15831995

    申请日：2017-12-05

    Applicant: MARKFORGED, INC.

    Inventor： Gregory Thomas Mark

    IPC: B22F3/00 ,  B33Y10/00 ,  B22F1/00 ,  B33Y70/00

    Abstract: 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. The drop height is of similar linear scale to the build plate. The materials are debound and sintered.

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