公开(公告)号：US20210162493A1

公开(公告)日：2021-06-03

申请号：US16700905

申请日：2019-12-02

Applicant: XEROX CORPORATION

Inventor： Douglas K. Herrmann ,  Erwin Ruiz ,  Thomas R. Race ,  Robert P. Herloski ,  Douglas E. Proctor ,  Thomas F. Wade ,  John C. Juhasz

IPC: B22D23/00 ,  B33Y10/00 ,  B33Y30/00

Abstract: A method of three-dimensional printing comprises heating a first portion of a build surface on a platform by impinging a laser beam on the build surface so as to provide a preheated drop contact point having a first deposition temperature. A first drop of a liquid print material is ejected from a printhead of a 3D printer so as to deposit the first drop on the preheated drop contact point at the first deposition temperature.

公开(公告)号：US09108358B1

公开(公告)日：2015-08-18

申请号：US14249549

申请日：2014-04-10

Applicant: Xerox Corporation

Inventor： Robert P. Herloski ,  Thomas R. Race

IPC: B41J29/38 ,  B41J2/015 ,  B41J2/14 ,  B41J2/16 ,  B29C67/00 ,  B41J2/045 ,  H04B10/40

CPC classification number: B29C67/00 ,  B29C64/112 ,  B29C64/386 ,  B33Y30/00 ,  B33Y50/02 ,  B41J2/14104

Abstract: An apparatus detects defects in an object during three-dimensional printing of the object. The apparatus uses a terahertz sensor to generate data corresponding to the thickness of an object being formed at a plurality of locations on the surface of a layer of the object. These thickness data are compared to thickness data for locations of the corresponding layer from a previous build of the object. If a difference in thickness exceeds a predetermined threshold, a defect is detected.

Abstract translation: 设备在物体的三维打印期间检测物体中的缺陷。 该装置使用太赫兹传感器来产生对应于在物体的层的表面上的多个位置处形成的物体的厚度的数据。 将这些厚度数据与来自对象的先前构建的相应层的位置的厚度数据进行比较。 如果厚度差超过预定阈值，则检测到缺陷。