Explanatory notes
… energy source, e.g., lasers, resistors, electron beams or UV light, to produce a 3-dimensional object out of materials … materials (e.g., photopolymer resins or plastics). The UV laser scans and hardens the first layer of plastics and … material drips out of a nozzle and is then hardened by a UV light. (4) Material extrusion machines heat filaments …
