US 11,951,519 B2
Electromagnetic extrusion
Jeremiah John Brady, Knoxville, TN (US); Edward Karl Steinebach, Oakridge, TN (US); and Gerard Michael Ludtka, Oakridge, TN (US)
Assigned to MAGNA INTERNATIONAL INC., Aurora (CA)
Appl. No. 16/771,389
Filed by Jeremiah John Brady, Knoxville, TN (US); Edward Karl Steinebach, Oakridge, TN (US); Gerard Michael Ludtka, Oakridge, TN (US); and MAGNA INTERNATIONAL INC., Aurora (CA)
PCT Filed Aug. 31, 2018, PCT No. PCT/US2018/049087
§ 371(c)(1), (2) Date Jun. 10, 2020,
PCT Pub. No. WO2019/118018, PCT Pub. Date Jun. 20, 2019.
Claims priority of provisional application 62/552,893, filed on Dec. 15, 2017.
Prior Publication US 2020/0391265 A1, Dec. 17, 2020
Int. Cl. B21C 23/21 (2006.01); B21C 23/03 (2006.01); B21C 23/04 (2006.01); B21C 23/20 (2006.01); B21C 27/00 (2006.01); B21C 29/02 (2006.01)
CPC B21C 23/03 (2013.01) [B21C 23/04 (2013.01); B21C 23/20 (2013.01); B21C 23/212 (2013.01); B21C 27/00 (2013.01); B21C 29/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electromagnetic extrusion system for extruding an extrusion material, comprising:
a container defining a chamber for holding the extrusion material, wherein the container has a cup shape with a tubular side wall defining an inner surface and extending in an axial direction from a solid base;
a die located adjacent to and outside of the container and defining an opening in fluid communication with the chamber for the extrusion material to exit therefrom as an extrusion;
a ram configured to push the extrusion material out of the opening; and
an electromagnetic winding disposed about both of the chamber and the die located outside of the container and configured to carry an electrical current to generate a magnetic field to reduce flow stress of the extrusion material,
wherein the die comprises a ferromagnetic material configured to intensify the magnetic field within the extrusion material, and
wherein the die is configured to move with the ram through the chamber with the opening extending between an outer surface of the die and the inner surface of the tubular side wall of the chamber.