What Is a Filament Recycling Machine and How Does It Work? Filament recycling machines are specialized devices designed to process and recycle 3D printing filament. These machines typically involve a series of steps, including cleaning, shredding, melting, and re-extruding the filament to create new, high-quality filament. By using a filament recycling machine, manufacturers can reduce costs, minimize waste, and achieve sustainability in their operations.