Rib parts (top) trialed using spring-frame molding (shown here, bottom, with curved C-channel part) and double diaphragm forming (DDF) processes in the DARPA-funded and Boeing co-funded RAPM program ...
In the composites industry, compression molding is among the apparently simplest processes available for fabrication: Insert material, close mold, add pressure, add heat, wait, cool mold, open mold, ...