US 11,993,031 B2
Carbonization shape forming of oxidized PAN fiber preform
John S. Linck, Pueblo, CO (US); and Katherine E. Waugh, Easton, CT (US)
Assigned to GOODRICH CORPORATION, Charlotte, NC (US)
Filed by GOODRICH CORPORATION, Charlotte, NC (US)
Filed on Jun. 3, 2022, as Appl. No. 17/832,426.
Claims priority of provisional application 63/212,264, filed on Jun. 18, 2021.
Prior Publication US 2022/0402220 A1, Dec. 22, 2022
Int. Cl. B29C 70/44 (2006.01); B29B 11/12 (2006.01); B29B 11/14 (2006.01); B29B 13/02 (2006.01); B29C 70/54 (2006.01); B29K 33/20 (2006.01)
CPC B29C 70/44 (2013.01) [B29B 11/12 (2013.01); B29B 11/14 (2013.01); B29B 13/02 (2013.01); B29C 70/541 (2013.01); B29C 70/544 (2021.05); B29K 2033/20 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for manufacturing a C/C part, the method comprising:
positioning an oxidized PAN fiber preform with a female forming tool, the female forming tool comprising a die recess;
positioning a vacuum bag over the oxidized PAN fiber preform;
forming the oxidized PAN fiber preform into a shaped body;
loading the female forming tool and the shaped body into a carbonization furnace; and
carbonizing the shaped body with the carbonization furnace, and the vacuum bag is burned away in the carbonization furnace during the carbonizing;
wherein the forming step comprises:
evacuating air from between the vacuum bag and the female forming tool to press the oxidized PAN fiber preform against the die recess of the female forming tool with the vacuum bag.