Open Source Rubber Extruder

• Use the D3D CNC Circuit Mill to mill from Aluminum
• Use a geared down stepper motor (3-5x) to enable printing with 3 mm and larger filaments, while simplifying the design of the extruder proper by removing the geardown from the extruder proper
• Neckless design - filament goes straight into heat break
• Heat break-less design in Phase 2 - the nozzle is larger and longer, and has a built-in heat break.

• thus, nozzle may have to be steel to decrease its thermal conductivity. See Thermal Conductivity of Metals.