3D Printer (FDM)

A thermoplastic filament is supplied to an extrusion nozzle which heats the material passed their glass transition temperature, once heated, the material is extruded(dispensed) onto a build plate layer by layer.

The Fused Deposition Modelling style of printing regained popularity after a 1980 patent expiry which allowed it to become a large open source project in a community called RepRap.

The material is hardened immediately after being pushed out of the nozzle and more material can then be built onto it. This nozzle is computer controlled to follow a specific tool path based on a model designed in a Computer Assisted Drawing software