公开(公告)号：US11642839B2

公开(公告)日：2023-05-09

申请号：US17277949

申请日：2019-07-22

Applicant: UNIVERSITY OF SOUTH FLORIDA

Inventor： Justin Nussbaum ,  Nathan Crane

IPC: B33Y10/00 ,  B33Y40/10 ,  B29C64/153 ,  B33Y50/02 ,  B29C64/245

CPC classification number: B29C64/153 ,  B29C64/245 ,  B33Y10/00 ,  B33Y40/10 ,  B33Y50/02

Abstract: The disclosed subject matter relates to method for increasing the molecular weight of a polymer material during an additive manufacturing process. The method can comprise disposing a first layer of the polymer material at a target surface; exposing the first layer of the polymer material to an energy source for a sufficient period of time to sinter or melt and undergo a condensation reaction at least at a portion of the polymer material; controlling the condensation reaction to allow a desired increased number average molecular weight of the polymer material; and repeating the method steps to form an object in a layerwise fashion. Controlling the condensation reaction can comprise controlling and/or adjusting an energy 10 source-related parameter, a polymer-related parameter, a temperature related parameter, a vacuum related parameter, a process duration, a processing gas, an air flow volume and/or speed, or a combination thereof.

公开(公告)号：US12269781B2

公开(公告)日：2025-04-08

申请号：US18193028

申请日：2023-03-30

Applicant: UNIVERSITY OF SOUTH FLORIDA

Inventor： Christopher Joseph Gardiner ,  Justin Nussbaum ,  Nathan Crane

IPC: C04B35/64 ,  B22F10/28 ,  B22F10/368 ,  B22F12/13 ,  B22F12/44 ,  B22F12/90 ,  B28B1/00 ,  B29C64/153 ,  B29C64/264 ,  B29C64/295 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00

Abstract: A large area sintering platform, system, and methodology. The system includes a convection oven with a projection window disposed within a top surface of the oven. A platform is disposed within the oven below the window at a spaced distance away from the window. A powder is positioned on top of the platform, with a thermocouple positioned within the powder on the platform. A high intensity projector moves in sync with the platform, and uses low intensities and long exposure times to project an image through the window onto the powder and sinter the powder to fabricate the desired model layer by layer.

公开(公告)号：US20230250028A1

公开(公告)日：2023-08-10

申请号：US18193028

申请日：2023-03-30

Applicant: UNIVERSITY OF SOUTH FLORIDA

Inventor： Christopher Joseph Gardiner ,  Justin Nussbaum ,  Nathan Crane

IPC: C04B35/64 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B29C64/264 ,  B29C64/153 ,  B29C64/295 ,  B29C64/393 ,  B28B1/00 ,  B22F10/28 ,  B22F12/13 ,  B22F12/44 ,  B22F10/368

CPC classification number: C04B35/64 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B29C64/264 ,  B29C64/153 ,  B29C64/295 ,  B29C64/393 ,  B28B1/001 ,  B22F10/28 ,  B22F12/13 ,  B22F12/44 ,  B22F10/368 ,  B22F12/90

Abstract: A large area sintering platform, system, and methodology. The system includes a convection oven with a projection window disposed within a top surface of the oven. A platform is disposed within the oven below the window at a spaced distance away from the window. A powder is positioned on top of the platform, with a thermocouple positioned within the powder on the platform. A high intensity projector moves in sync with the platform, and uses low intensities and long exposure times to project an image through the window onto the powder and sinter the powder to fabricate the desired model layer by layer.

公开(公告)号：US11643366B2

公开(公告)日：2023-05-09

申请号：US16637448

申请日：2018-07-02

Applicant: UNIVERSITY OF SOUTH FLORIDA

Inventor： Christopher Joseph Gardiner ,  Justin Nussbaum ,  Nathan Crane

IPC: C04B35/64 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B29C64/264 ,  B29C64/153 ,  B29C64/295 ,  B29C64/393 ,  B28B1/00 ,  B22F10/28 ,  B22F12/13 ,  B22F12/44 ,  B22F10/368 ,  B22F12/90

CPC classification number: C04B35/64 ,  B22F10/28 ,  B22F10/368 ,  B22F12/13 ,  B22F12/44 ,  B28B1/001 ,  B29C64/153 ,  B29C64/264 ,  B29C64/295 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B22F12/90

Abstract: A large area sintering platform, system, and methodology. The system includes a convection oven with a projection window disposed within a top surface of the oven. A platform is disposed within the oven below the window at a spaced distance away from the window. A powder is positioned on top of the platform, with a thermocouple positioned within the powder on the platform. A high intensity projector moves in sync with the platform, and uses low intensities and long exposure times to project an image through the window onto the powder and sinter the powder to fabricate the desired model layer by layer.

公开(公告)号：US11376795B1

公开(公告)日：2022-07-05

申请号：US16518342

申请日：2019-07-22

Applicant: University of South Florida

Inventor： Justin Nussbaum ,  Nathan Brad Crane

IPC: B29C64/393 ,  B33Y50/02 ,  B33Y10/00 ,  B29C64/153

Abstract: The disclosed subject matter relates to methods for monitoring or controlling a manufacturing process of a material by determining when a variation in surface characteristics takes place. Such surface characteristics correlates to the processing condition of the material and can include density, roughness, porosity, or planarity on a surface of the material. The methods can include herein can include directing a solvent or energy on a surface of the material to form an at least partially modified surface, directing light at an incident angle with respect to the at least partially modified surface, measuring one or more predetermined properties of light reflected from the at least partially modified surface, determining that the material is fully processed based on the measured predetermined property of the light reflected, and optionally adjusting a processing parameter of the manufacturing process in response to the measured predetermined property.