公开(公告)号：US11738515B2

公开(公告)日：2023-08-29

申请号：US17545159

申请日：2021-12-08

Applicant: UT Battelle, LLC

Inventor： Seokpum Kim ,  Ahmed Arabi Hassen ,  Lonnie J. Love ,  Vlastimil Kunc

IPC: B29C64/386 ,  B29C64/118 ,  B33Y50/00 ,  B33Y30/00 ,  B33Y10/00

CPC classification number: B29C64/386 ,  B29C64/118 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00

Abstract: Systems and methods for generating molecular dynamic graded lattice structures that can be used as infill for additively manufactured articles. Molecular dynamically generated lattice infill is based on force balancing a node distribution instead of a circle packing. Field data can be utilized to adjust the spacing of the node distribution according to a force balance equilibrium model that accounts for the field expected to be experienced by the article being additively manufactured. The resultant non-uniform honeycomb structures from force-balancing robustly and efficiently address the connection issues with traditional non-uniform lattice structures.

公开(公告)号：US20210154896A1

公开(公告)日：2021-05-27

申请号：US16953425

申请日：2020-11-20

Applicant: UT-Battelle, LLC

Inventor： Vlastimil Kunc ,  Ahmed A. Hassen ,  John M. Lindahl ,  Seokpum Kim

IPC: B29C45/00 ,  B29C45/54

Abstract: An improved method for obtaining high fiber volume fraction, long fiber injection molded articles is provided. According to one embodiment, the method includes forming an injection molding feedstock by cutting pre-impregnated fiber-reinforced tape into platelets. The platelets can be coated with a thin layer of polymer to allow sliding of the platelets with respect to each other at the early stages of plastication, rather than forcing relative motion of fibers with respect to each other. The method can further include the dispersion of material only in the final stages of the injection molding screw to promote gentle motion of the feedstock at the earlier stages of the plastication process. The method allows improvement of mechanical properties of articles manufactured with equipment and techniques that are prevalent in high volume automotive and consumer industries.

公开(公告)号：US20240383196A1

公开(公告)日：2024-11-21

申请号：US18375053

申请日：2023-09-29

Applicant: UT-Battelle, LLC

Inventor： Tyler C. Smith ,  Ahmed A. Hassen ,  John M. Lindahl ,  Seokpum Kim ,  Vlastimil Kunc ,  Vipin Kumar ,  Chase Joslin

IPC: B29C64/209 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B29K105/14

Abstract: An additive manufacturing system for an additive manufacturing material and embedded short-chopped fibers includes an extruder comprising a nozzle having a nozzle flow channel. The nozzle includes a plurality of spaced apart elongated aligning structures distributed inside the nozzle flow channel and parallel to the longitudinal center axis defining alignment flow channels within the nozzle flow channel. A nozzle for additive manufacturing, a method of additive manufacturing, and a method of making a nozzle for an additive manufacturing system for and additive manufacturing material and embedded short-chopped fibers are also disclosed.

公开(公告)号：US11534977B2

公开(公告)日：2022-12-27

申请号：US16750631

申请日：2020-01-23

Applicant: UT-Battelle, LLC

Inventor： Seokpum Kim ,  Vlastimil Kune ,  Ahmed A. Hassen ,  John M. Lindahl ,  Brian K. Post ,  Alex C. Roschli ,  Phillip C. Chesser ,  Michael C. Borish ,  Gregory D. Dreifus ,  Lonnie J. Love ,  Craig A. Blue ,  Bentley T. Beard, II

IPC: G05B19/25 ,  B29C64/393 ,  B33Y50/02 ,  G05B19/4099 ,  G05B19/37 ,  G05B19/41 ,  G05B19/39 ,  G05B19/40 ,  B33Y10/00

Abstract: A system and method for improving additive manufacturing, including additive manufacturing toolpaths, is provided. The system and method includes a toolpath generator that obtains initial toolpaths of an object, identifies isolated paths in the toolpaths, and adds bridge connections between neighboring isolated paths in each layer to improve the toolpaths. The bridge connections facilitate the continuous and non-stop deposition of each layer according to improved toolpaths during additive manufacture, which can reduce total deposition time and improve the resultant additive manufacture.

公开(公告)号：US11518073B2

公开(公告)日：2022-12-06

申请号：US16953425

申请日：2020-11-20

Applicant: UT-Battelle, LLC

Inventor： Vlastimil Kunc ,  Ahmed A. Hassen ,  John M. Lindahl ,  Seokpum Kim

IPC: B29C45/00 ,  B29C45/54 ,  B29K309/08 ,  B29K105/12 ,  B29K77/00

Abstract: An improved method for obtaining high fiber volume fraction, long fiber injection molded articles is provided. According to one embodiment, the method includes forming an injection molding feedstock by cutting pre-impregnated fiber-reinforced tape into platelets. The platelets can be coated with a thin layer of polymer to allow sliding of the platelets with respect to each other at the early stages of plastication, rather than forcing relative motion of fibers with respect to each other. The method can further include the dispersion of material only in the final stages of the injection molding screw to promote gentle motion of the feedstock at the earlier stages of the plastication process. The method allows improvement of mechanical properties of articles manufactured with equipment and techniques that are prevalent in high volume automotive and consumer industries.

公开(公告)号：US20220088881A1

公开(公告)日：2022-03-24

申请号：US17475512

申请日：2021-09-15

Applicant: UT-Battelle, LLC

Inventor： Seokpum Kim ,  Ahmed A. Hassen ,  John M. Lindahl ,  Lonnie J. Love ,  Vlastimil Kunc ,  Thomas Feldhausen

IPC: B29C64/393 ,  B29C64/236

Abstract: A simulation-assisted additive manufacturing system and method for generating an anisotropic compensation to account for non-uniform deformation due to additive manufacturing and service loading. The predicted deformation may not be fully defined. The present disclosure provides a system and method for estimating the missing deformation data through regression analysis. The present disclosure also provides an integrated framework where the various simulated-assisted design modules are configured for two-way communication and sharing access to changes to the model.

公开(公告)号：US12233603B2

公开(公告)日：2025-02-25

申请号：US18216865

申请日：2023-06-30

Applicant: UT Battelle, LLC

Inventor： Seokpum Kim ,  Ahmed Arabi Hassen ,  Lonnie J. Love ,  Vlastimil Kunc

IPC: B33Y10/00 ,  B29C64/118 ,  B29C64/386 ,  B33Y30/00 ,  B33Y50/00

Abstract: Slicer system for generating molecular dynamic graded lattice structures that can be used as infill for additively manufactured articles. Molecular dynamically generated lattice infill is based on force balancing a node distribution instead of a circle packing. Field data can be utilized to adjust the spacing of the node distribution according to a force balance equilibrium model that accounts for the field expected to be experienced by the article being additively manufactured. The resultant non-uniform honeycomb structures from force-balancing robustly and efficiently address the connection issues with traditional non-uniform lattice structures.

公开(公告)号：US11199517B2

公开(公告)日：2021-12-14

申请号：US16539184

申请日：2019-08-13

Applicant: UT-Battelle, LLC

Inventor： Vlastimil Kunc ,  Ahmed A. Hassen ,  Pooran C. Joshi ,  Seokpum Kim ,  John M. Lindahl ,  Chad E. Duty ,  Jordan A. Failla ,  Tyler C. H. Smith

IPC: G01N27/20 ,  B33Y40/00 ,  B29C64/30 ,  G01N27/04

Abstract: A structural health monitoring method is provided that utilizes self-sensing printed polymer structures. The method is based on resistivity properties of conductive materials, which can be integrated to a 3D printed polymer structure during additive manufacturing. An article to be monitored has at least one 3D printed polymer structure including a circuit comprising at least one conductive pathway extending through a non-conductive material. The resistance across the circuit is measured during or after loading of the article to determine a resistance value. The measured resistance value is compared to a known resistance value, and based on the comparison, a defect can be detected in the 3D printed polymer structure. Structural health monitoring systems and articles with integrated structural health monitoring are also provided.

公开(公告)号：US20210370606A1

公开(公告)日：2021-12-02

申请号：US17333619

申请日：2021-05-28

Applicant: UT Battelle, LLC

Inventor： Seokpum Kim ,  John C. Bowers ,  Kenneth Stephenson ,  Vlastimil Kunc ,  Ahmed Arabi Hassen ,  Lonnie J. Love ,  Gregory D. Dreifus

IPC: B29C64/386 ,  B29C64/118 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00

Abstract: Systems and methods for generating graded lattice structures that can be used as infill for additively manufactured articles. Tailored sectioning and field-based smoothing are modified polygon, e.g., circle, packing algorithms that adjust the size of the circles based on physical field data to adapt the infill generation process to a field expected to be experienced by the article. Molecular dynamically generated lattice infill is based on force balancing a node distribution instead of a circle packing. Field data can be utilized to adjust the spacing of the node distribution according to a force balance equilibrium model that accounts for the field expected to be experienced by the article being additively manufactured. The resultant non-uniform honeycomb structures from tailored sectioning, field-based smoothing, and force-balancing robustly and efficiently address the connection issues with traditional non-uniform lattice structures.

公开(公告)号：US20210055710A1

公开(公告)日：2021-02-25

申请号：US16842274

申请日：2020-04-07

Applicant: UT-Battelle, LLC

Inventor： Michael C. Borish ,  Alex C. Roschli ,  Brian K. Post ,  Phillip C. Chesser ,  Seokpum Kim

IPC: G05B19/4099 ,  B29C64/393 ,  B33Y50/02 ,  G06T19/20

Abstract: Toolpath generation for additive manufacturing systems involves operations on polygonal contours derived from a model for additively manufacturing a structure. One aspect involves modifying or creating a model to allow parts to be printed without starting and stopping the printing equipment by generating continuous toolpaths or toolpaths having a reduced number of isolated paths. Another aspect involves modifying a slicing engine to generate a continuous toolpath or toolpath having a reduced number of isolated paths based on a representation of an object to be additively manufactured. Another aspect involves selectively placing the gaps at alternating positions among the sliced layers to create a zippering effect.