US 11,806,956 B1
Method of repairing sandwich structure
Jacob M. Hundley, Newbury Park, CA (US); Eric C. Clough, Santa Monica, CA (US); Zak C. Eckel, Calabasas, CA (US); David Page, Malibu, CA (US); and Sophia S. Yang, Los Angeles, CA (US)
Assigned to HRL LABORATORIES, LLC, Malibu, CA (US)
Filed by HRL LABORATORIES, LLC, Malibu, CA (US)
Filed on Jul. 9, 2021, as Appl. No. 17/372,186.
Application 17/372,186 is a division of application No. 16/654,840, filed on Oct. 16, 2019, granted, now 11,148,375.
Application 16/654,840 is a continuation in part of application No. 15/690,229, filed on Aug. 29, 2017, granted, now 10,946,600, issued on Mar. 16, 2021.
Claims priority of provisional application 62/772,507, filed on Nov. 28, 2018.
Int. Cl. B29C 73/10 (2006.01); B64F 5/40 (2017.01); B29C 73/02 (2006.01); B29C 73/06 (2006.01); B23P 6/00 (2006.01); B32B 3/12 (2006.01); B29L 7/00 (2006.01); B64C 1/00 (2006.01)
CPC B29C 73/10 (2013.01) [B23P 6/00 (2013.01); B29C 73/02 (2013.01); B29C 73/06 (2013.01); B64F 5/40 (2017.01); B29L 2007/002 (2013.01); B32B 3/12 (2013.01); B32B 2605/18 (2013.01); B64C 2001/0072 (2013.01); F05D 2230/80 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of repairing a sandwich structure, the sandwich structure comprising a first facesheet, a second facesheet, and a core between the first and second facesheets, the method comprising:
forming a repair volume in the sandwich structure by removing a damaged portion of the first facesheet and a damaged portion of the core;
forming a mold on a replacement facesheet, the mold and the replacement facesheet forming an open volume;
filling the open volume with an ultraviolet-curable photomonomer;
forming a plurality of photopolymer waveguides by partially curing the ultraviolet-curable photomonomer; and
inserting the photopolymer waveguides into the repair volume in the sandwich structure.