US Patent No. 9,992,917


Patent No. 9,992,917
Issue Date June 05, 2018
Title 3-d Printing Method For Producing Tungsten-based Shielding Parts
Inventorship Charles H. Yanke, Oconomowoc, WI (US)
Robert R. Durkee, III, Austin, TX (US)
David W. Douglas, Austin, TX (US)
Assignee VULCAN GMS, Milwaukee, WI (US)

Claim of US Patent No. 9,992,917

1. A method of manufacturing an electromagnetic shielding element, comprising the steps of:receiving data defining one or more parameters of an electromagnetic shielding element;
generating a digital model of the electromagnetic shielding element from the one or more parameters;
defining an additive fabrication tool pathway for forming the electromagnetic shielding element according to the digital model;
providing to an additive fabrication tool a molten compound consisting of a substantially pure volume of tungsten substantially evenly distributed throughout a polymeric matrix in a molten state, wherein the molten compound comprises at least 90 percent tungsten by weight and equal to or less than 60 percent tungsten by volume;
dispensing from the additive fabrication tool, the molten compound into a predetermined location according to the tool pathway, wherein the predetermined location defines the shape of the electromagnetic shielding element; and
cooling the molten compound to form a hardened compound comprising the volume of tungsten substantially evenly distributed throughout a single uninterrupted layer of the polymeric matrix in a hardened state to define the electromagnetic shielding element, wherein the electromagnetic shielding element has a density substantially equivalent to lead and exhibits an x-ray radiation attenuation property substantially equivalent to lead.