The working principle of the 3D printing filament machine is essentially the application of "plastic extrusion molding" technology. Through the closed-loop process of "feeding - melting - extrusion - cooling - traction - winding", granular raw materials are transformed into high-precision filament consumables. The core lies in the parameter coordination of each link (temperature, speed, tension) to ensure the dimensional accuracy and performance stability of the consumables, providing high-quality raw materials for FDM 3D printing. Feature ?? PET-Specific Design Tailored exclusively for PET materials, with a temperature range of 0-300℃ (adjustable) – optimal at 200-240℃ (factory preset to 216℃ for immediate use). Boasts a 1.7mm nozzle diameter and 1.8mm filament output diameter, with customizable outlet diameters available to meet specific needs. ?? Targeted for Plastic Bottles Ideal for transparent PET plastic bottles (mineral water bottles, cola bottles, Sprite bottles, etc.). No complex pretreatment required – simply adjust the cutting width (6-10mm adjustable) for different bottles: default width fits mineral water bottles, while cola/Sprite bottles can be fine-tuned by lowering a gasket for narrower cuts. Perfect for DIY enthusiasts and educational scenarios, visually demonstrating the integration of PET bottle recycling and 3D printing technology. ?? Efficient PET-to-Filament Conversion Directly transforms waste PET plastic bottles into 3D printing filaments without cumbersome preprocessing. Streamlines the recycling-to-production loop for sustainable 3D printing. ?? Intelligent & Automated Operation Integrates heating (with precise temperature control), traction, and winding in one system. One-button start enables automatic filament formation, leveraging preset parameters (like 216℃) for hassle-free use. ?? High Precision & Ready-to-Use Output LCD screen displays real-time temperature and speed. With consistent 1.8mm filament diameter (±0.05mm error), the output requires no secondary calibration and is directly usable for 3D printing. Customizable outlet diameters further enhance adaptability.