What equipment works best for dosing color masterbatch accurately?

Gravimetric dosers give the most accurate color masterbatch feed because they measure weight loss in real time and adjust screw speed to hit the exact percentage. Volumetric dosers are cheaper and simpler-calibrate screw speed against throughput-but they drift if pellet density changes. For liquid masterbatch, peristaltic pumps or gear pumps meter precisely without air bubbles. (color masterbatch) pellet feeders mount directly on the throat or use side-feeders for better mixing. Central conveying systems with multiple dosers handle several machines from one color source. Look for loss-in-weight models with automatic calibration and alarms for low material or bridging. In extrusion, auger-style dosers suit high rates. Clean feeders between colors to avoid streaks. Good dosing equipment cuts color variation, reduces waste, and keeps parts consistent run after run.