US 12,350,864 B2
Systems and methods for casting propellant grain
Brian Wilson, Vacaville, CA (US); and Jean C Rodriguez, Watertown, SD (US)
Assigned to GOODRICH CORPORATION, Charlotte, NC (US)
Filed by GOODRICH CORPORATION, Charlotte, NC (US)
Filed on Dec. 19, 2023, as Appl. No. 18/545,882.
Application 18/545,882 is a division of application No. 17/022,931, filed on Sep. 16, 2020, granted, now 11,883,985.
Prior Publication US 2024/0149502 A1, May 9, 2024
Int. Cl. B29C 39/26 (2006.01); B29C 33/44 (2006.01); B29C 39/36 (2006.01); F02K 9/24 (2006.01)
CPC B29C 39/26 (2013.01) [B29C 33/448 (2013.01); B29C 39/36 (2013.01); F02K 9/24 (2013.01); B29K 2901/12 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for casting a solid propellant, comprising:
disposing a mandrel with respect to a casting tube, wherein a cavity is formed between the mandrel and the casting tube;
moving an uncured propellant grain into the cavity;
curing the propellant grain around the mandrel, wherein a perforation is formed in the cured propellant grain via the mandrel;
breaking a first portion of the mandrel apart from a second portion of the mandrel; and
removing the first portion from within the propellant grain, while leaving the second portion embedded in the cured propellant grain.