The 3D printer pulls a biodegradable plastic material – in the shape of a more than 100 metre long cord – into a hot metal nozzle that melts the plastic material. The nozzle and the surface on which the printer is printing subsequently move in the pattern that you wish to print. This process is repeated layer by layer while the distance of the nozzle to the surface is increased. In this way, the object you want to print is also shaped upwards.
On a Sculpto 3D printer, the metal nozzle is located on a moveable arm whilst the printing surface is rotating circularly beneath the nozzle.