Global Filtration Systems

Divergent Technologies, Inc.

Global Filtration Systems, a Dba of Gulf Filtration Systems Inc.

Andrius Raulinaitis

Ali El-Siblani

Alexandr Shkolnik

Michael James Hoganson

Eric Yang

Apparatuses for dynamically sensing infrared (IR) radiation in an electron beam powder bed fusion (EB-PBF) printer are provided. A radiation collector receives radiation from a surface of the powder bed. An IR-transparent material rejects one or more non-IR wavelengths, and a lens focuses the IR radiation onto an optical fiber. The IR radiation is carried from the vacuum chamber of the printer to a sensor, where IR information is determined based on the received IR radiation. The IR information may be received from the sensor and used by the print controller to modify one or more parameters, such as beam intensity or scanning rate, on the fly or during the next print cycle. An occlusion member can be used to selectively block or expose the radiation collector to protect the radiation collector from condensation of vapor from vaporization of particles at high temperatures.

Infrared radiation sensing and beam control in electron beam additive manufacturing

A method and apparatus for making a three-dimensional object by solidifying a photohardenable material are shown and described. A photohardening inhibitor is admitted into a surface of a photohardenable material through a flexible film to create a 'non-solidification zone' where little or no solidification occurs. The non-solidification zone prevents the exposed surface of the photohardenable material from solidifying in contact with the film. The inhibitor tends to cause the film to deform along the build axis, thereby creating a non-planar interface between the photohardenable material and the film, which distorts the resulting three-dimensional object. An apparatus is provided to stabilize the flexible film and eliminate or minimize such deformation.

Method of stabilizing a photohardening inhibitor-permeable film in the manufacture of three-dimensional objects

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Long Beach, CA, United States of America

Andrius Raulinaitis