If you’ve used a desktop 3D printer in the past, you’re almost certainly done battle with “strings”. These are the wispy bits of filament that harden in the air, usually as the printer’s nozzle moves ...
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 ...