I got nothing from the project description, but here's the patent: https://www.google.com/patents/US6516866 https://www.google.com/patents/US6516866 It sounds

I got nothing from the project description, but here's the patent: https://www.google.com/patents/US6516866 https://www.google.com/patents/US6516866 It sounds like a mashup of injection molding and lost wax casting (what they call "lost core molding").