US 12,103,067 B2
Method of manufacturing a cold box core
Andrew Henderson Pike, Ooltewah, TN (US); Joel Clinton Busler, Fyffe, AL (US); and Jason White Bradley, Soddy-Daisy, TN (US)
Assigned to Mueller International, LLC, Atlanta, GA (US)
Filed by Mueller International, LLC, Atlanta, GA (US)
Filed on Aug. 31, 2022, as Appl. No. 17/900,253.
Application 17/900,253 is a division of application No. 16/742,562, filed on Jan. 14, 2020, granted, now 11,458,532.
Prior Publication US 2022/0410255 A1, Dec. 29, 2022
Int. Cl. B22C 9/10 (2006.01); B22C 9/12 (2006.01); B33Y 40/20 (2020.01); B33Y 80/00 (2015.01); B33Y 10/00 (2015.01)
CPC B22C 9/10 (2013.01) [B22C 9/123 (2013.01); B33Y 40/20 (2020.01); B33Y 80/00 (2014.12); B33Y 10/00 (2014.12)] 14 Claims
OG exemplary drawing
 
1. A method of manufacturing a cold box core, the method comprising:
injecting unbonded sand into a cold box core tool, the unbonded sand comprising sand mixed with a resin, the cold box core tool comprising:
a first platen;
a first insert half secured to the first platen;
a second platen; and
a second insert half secured to the second platen and configured to alternately mate with and separate from the first insert half, each of the first insert half and the second insert half being three-dimensionally printed from a polymer material and having a near-net shape and being trimmed with a CNC router, the first insert half and the second insert half together forming a cavity therebetween defining an outer geometric shape of the cold box core; and
injecting gas into the unbonded sand to harden the cold box core.