US 11,998,965 B2
Shrink ring for extrusion die, and extrusion die comprising same
Iouri Zlotnikov, Macomb, MI (US); Christopher Braun, Harrison Township, MI (US); Russell Peterson, New Baltimore, MI (US); Robert Sulisz, Macomb, MI (US); and Jason Krause, Marine City, MI (US)
Assigned to Exco Technologies Limited, Markham (CA)
Filed by Exco Technologies Limited, Markham (CA)
Filed on Jul. 12, 2022, as Appl. No. 17/862,550.
Prior Publication US 2024/0017313 A1, Jan. 18, 2024
Int. Cl. B21C 25/02 (2006.01); B21C 25/04 (2006.01)
CPC B21C 25/02 (2013.01) [B21C 25/04 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An extrusion die comprising:
a cylindrical mandrel having a unitary, single-piece construction, the mandrel having a circumferential groove formed therein;
a cylindrical die plate, the mandrel and the die plate being coupled together; and
a shrink ring disposed in the circumferential groove of the mandrel,
wherein the shrink ring is separate from the cylindrical die plate and is coupled to the mandrel by interference fit,
wherein the shrink ring has a radially innermost surface abutting the circumferential groove,
wherein the shrink ring has an additional circumferential groove formed therein, and
wherein the die plate has a circumferential tab formed therein, the circumferential tab engaging the additional circumferential groove of the shrink ring.