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 ...
Piper Plastics (Chandler, AZ) reports that it has developed a proprietary high-pressure molding technology that yields near-net-shape polymers up to 2 inches thick without porosity, voids or sinks.
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