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    Laser preheating in three-dimensional printing
    4.
    发明授权
    Laser preheating in three-dimensional printing 有权

    公开(公告)号：US11192298B2

    公开(公告)日：2021-12-07

    申请号：US16544414

    申请日：2019-08-19

    申请人： Stratasys, Inc.

    发明人： Jason Robert Nixon ,  Clint Newell ,  Timothy Diekmann

    IPC分类号： B29C64/194 ,  B33Y10/00 ,  B29C64/295 ,  B29C64/118 ,  B33Y30/00

    摘要： A method for additive manufacturing a part using fused deposition modeling 3D printing technology includes projecting a laser image from one or more laser emitters onto a previously printed bead or beads of thermoplastic material forming a portion of the part, along a tool path for a next bead in a subsequent part layer. The laser image has a width of between about 50% to 75% of a commanded beadwidth of the next bead, and is moved along a tool path that is generally transverse to the width thereof, to thereby selectively irradiate and heat the previously printed thermoplastic material to at least a bonding temperature thereof but below a degradation temperature. A bead of thermoplastic material is extruded from an extrusion head and deposited along the tool path while at least a top surface portion of the irradiated material remains at or above its bonding temperature, so that strong adhesion occurs between part layers.

    BRAIDED COMINGLED TOW FILAMENT FOR USE IN 3D PRINTING
    5.
    发明申请
    BRAIDED COMINGLED TOW FILAMENT FOR USE IN 3D PRINTING 审中-公开

    公开(公告)号：US20200324462A1

    公开(公告)日：2020-10-15

    申请号：US16843025

    申请日：2020-04-08

    申请人： Stratasys, Inc.

    发明人： Clint Newell

    IPC分类号： B29C64/118 ,  B29C64/307 ,  B33Y10/00 ,  B33Y70/10 ,  B29B11/10

    摘要： A feedstock configured for use in an extruder in an additive manufacturing system is configured as a braided comingled tow filament. A method of producing the braided comingled tow filament includes providing a bundle of comingled tow material having a fiber count ranging from about 1,000 fibers to about 25,000 fibers having thermoplastic fibers comingled therewith, wherein the tow material in the filament ranges from about 50 to 75 volume percent and the volume percent of the thermoplastic material ranges from about 25 volume percent to about 50 volume percent. The method includes dividing the length of comingled tow material into sections, twisting each section into a strand to form a plurality of strands of twisted tow material, and braiding together the strands.

    MULTIPLE AXIS ROBOTIC ADDITIVE MANUFACTURING SYSTEM AND METHODS
    7.
    发明申请
    MULTIPLE AXIS ROBOTIC ADDITIVE MANUFACTURING SYSTEM AND METHODS 审中-公开

    公开(公告)号：US20190262986A1

    公开(公告)日：2019-08-29

    申请号：US16327204

    申请日：2017-08-22

    申请人： Stratasys, Inc.

    发明人： Clint Newell

    IPC分类号： B25J9/04 ,  B29C64/209 ,  B29C64/245 ,  B29C64/295 ,  B29C64/118

    摘要： A multiple axis robotic additive manufacturing system includes a robotic arm movable in six degrees of freedom. The system includes a build platform movable in at least two degrees of freedom and independent of the movement of the robotic arm to position the part being built to counteract effects of gravity based upon part geometry. The system includes an extruder mounted at an end of the robotic arm. The extruder is configured to extrude at least part material with a plurality of flow rates, wherein movement of the robotic arm and the build platform are synchronized with the flow rate of the extruded material to build the 3D part.