*2.3. Technologies Based on the Method of Layered Extrusion of Molten Thermoplastics (FDM, MEM, FFF)*

3D printing technology uses continuous filament from thermoplastic material as the basic material while additional material is used to make the support. The fibre from the material spool is fed from the coil through a movable, heated extruder head. The molten material is ejected from the extruder nozzle and deposited on a 3D printing platform that can be heated, for additional grip. The movement of the extruder head is controlled by computer. The next layer is applied onto the previous layer until the manufacturing process of the object is completed [19,21,22,24,25,27].
