US 11,685,095 B2
Method and apparatus for forming tire components using a coextruded strip
Christopher David Dyrlund, Canton, OH (US); Gary Robert Burg, Pawleys Island, SC (US); and Hongbing Chen, Broadview Heights, OH (US)
Assigned to THE GOODYEAR TIRE & RUBBER COMPANY, Akron, OH (US)
Filed by The Goodyear Tire & Rubber Company, Akron, OH (US)
Filed on Dec. 19, 2018, as Appl. No. 16/225,100.
Application 16/225,100 is a continuation in part of application No. 15/183,085, filed on Jun. 15, 2016, abandoned.
Claims priority of provisional application 62/186,422, filed on Jun. 30, 2015.
Prior Publication US 2019/0152116 A1, May 23, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 48/49 (2019.01); B29D 30/52 (2006.01); B29C 48/30 (2019.01); B29C 48/37 (2019.01); B29K 21/00 (2006.01); B29L 30/00 (2006.01); B29C 48/07 (2019.01); B29C 48/305 (2019.01); B29C 48/375 (2019.01)
CPC B29C 48/49 (2019.02) [B29C 48/30 (2019.02); B29C 48/37 (2019.02); B29D 30/52 (2013.01); B29C 48/07 (2019.02); B29C 48/307 (2019.02); B29C 48/387 (2019.02); B29K 2021/00 (2013.01); B29L 2030/002 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An apparatus for forming a coextruded strip of a first compound A and a second compound B, the apparatus comprising:
a first extruder in fluid communication with a first gear pump for processing a first compound A; and
a second extruder in fluid communication with a second gear pump for processing a second compound B,
wherein the second compound B is different than the first compound A, wherein the outlet from the first gear pump is in fluid communication with a first channel of a coextrusion nozzle, and the outlet from the second gear pump is in fluid communication with a second channel of the coextrusion nozzle, wherein the co-extrusion nozzle has an insert having a distal end positioned adjacent to an outlet of the co-extrusion nozzle, wherein the insert divides the co-extrusion nozzle into first and second passageways, wherein a high pressure, low volume coextrusion zone is between the distal end of the insert and the outlet of the co-extrusion nozzle, wherein in the high pressure, low volume coextrusion zone, a first compound A flowstream merges with a second compound B flowstream to form a coextruded strip having a first layer of compound A and a second layer of compound B joined together at an interface.