Extruder Heater+Nozzle Assembly; Single Material Port, Two Side Air Ports (Idea 20090531) (Q34566)

This is a work-in-progress (not fabricated/prototyped yet), exploring how to design a CNC/laser cuttable extruder head assembly for Makerbot/CandyFab applications. - Target material is 0.9mm thick steel/aluminum as provided by http://www.ponoko.com/ - Routed channels are 1mm or 2mm wide - Bolt-holes are 2mm in diameter. - The pieces are to bolt together, then heater wire wrapped around the indented sides. - Material is fed from the top; air from the side ports. - If a magnetic material like steel is chosen for the Upper Plate, air feeds could be magnetically attached. - Total design height is 70mm to allow for three stages of heater-wire wrap for graduated heating temperatures. - Removing one or two of the stages would shorten the height by 16mm or 32mm respectively. - License set to Attribution - Share Alike - Creative Commons. Feel free to adapt and make money off it as long as you share your mods!