FGF stands for Fused Granular Fabrication and is an additive manufacturing method. This means that the machine builds up a product in successive stages from molten plastic granules, rather than e.g. cutting a product from a plastic block.
OUR STANDARD EXTRUDERS
Nozzle size 0.6–2 mm. Maximum of 1 kg/hour.
Nozzle size 2–8 mm. Maximum of 14 kg/hour.
Nozzle size 6–14 mm. Maximum of 35 kg/hour.
The product is formed on a build platform . Plastic granules are supplied to a vertical extrusion screw  that rotates, heats up and presses the granules down to form a molten homogeneous plastic mass. The mass is pressed through an exchangeable nozzle , where the flow is controlled by the nozzle diameter. Larger diameters deliver higher building speeds but poorer surface finish and vice versa.
The mass is deposited through the nozzle at constant speed, and a layer of the CAD model is built up. After each layer, the build platform is lowered, and the next layer is added.
If necessary, a supporting structure  is also printed to allow overhangs.