公开(公告)号：US10061221B2

公开(公告)日：2018-08-28

申请号：US15363453

申请日：2016-11-29

Applicant: Evolve Additive Solutions, Inc.

Inventor： James E. Orrock ,  Steven A. Chillscyzn ,  Trevor I. Martin

IPC: G03G13/22 ,  G03G13/08 ,  G03G9/097 ,  G03G9/087 ,  G03G9/08 ,  G03G13/16 ,  G03G13/20 ,  B29C67/24 ,  B29C43/00 ,  G03G15/22 ,  G03G15/08 ,  B29C64/153 ,  B29K77/00 ,  B29K105/00 ,  B33Y30/00

CPC classification number: G03G13/22 ,  B29C43/006 ,  B29C64/153 ,  B29C67/24 ,  B29K2077/00 ,  B29K2105/0005 ,  B29K2105/0023 ,  B29K2105/005 ,  B29K2105/251 ,  B29K2995/0094 ,  B33Y30/00 ,  G03G9/0819 ,  G03G9/08757 ,  G03G9/08764 ,  G03G9/08766 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09783 ,  G03G9/09791 ,  G03G13/08 ,  G03G13/16 ,  G03G13/20 ,  G03G15/08 ,  G03G15/1625 ,  G03G15/224 ,  G03G15/24 ,  G03G2215/1695

Abstract: A method of printing three-dimensional parts with an electrophotography-based additive manufacturing system, with a part material including a composition having an engineering-grade thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.

公开(公告)号：US11150570B2

公开(公告)日：2021-10-19

申请号：US15726892

申请日：2017-10-06

Applicant: Evolve Additive Solutions, Inc.

Inventor： James E. Orrock ,  Steven A. Chillscyzn ,  Trevor I. Martin

IPC: G03G13/22 ,  G03G15/22 ,  B29C64/153 ,  B33Y70/00 ,  G03G13/08 ,  G03G9/087 ,  G03G9/097 ,  G03G9/08 ,  G03G13/16 ,  G03G13/20 ,  G03G15/24 ,  G03G15/16 ,  B29K71/00 ,  B29K105/00 ,  B29K81/00 ,  B29K77/00

Abstract: A method for printing a three-dimensional part with an electrophotography-based additive manufacturing system having an electrophotography engine, a transfer medium, and a layer transfusion assembly includes providing a part material to the electrophotography-based additive manufacturing system, the part material compositionally comprising a charge control agent, and a thermoplastic material having a heat deflection temperature greater than about 150° C., and has a powder form. The method includes triboelectrically charging the part material to a Q/M ratio having a negative charge or a positive charge, and a magnitude ranging from about 5 micro-Coulombs/gram to about 50 micro-Coulombs/gram and developing layers of the three-dimensional part from the charged part material with the electrophotography engine. The method includes electrostatically attracting the developed layers from the electrophotography engine to the transfer medium and moving the attracted layers to the layer transfusion assembly with the transfer medium, wherein the layer transfusion assembly comprises a nip roller. The method includes transfusing the moved layers to previously-printed layers of the three-dimensional part with by moving the attracted layers about a nip of a nip roller using heat and pressure over time.