Gravimetric feeders weigh what they deliver, giving tight accuracy and full batch traceability. Recipe control, variable frequency or servo screw drives and a rigid weigh frame with precision load cells keep feed-rate variation within narrow limits for continuous compounding, extrusion and blending.
Volumetric screw feeders are a simple, economical choice when density is stable. Consistent material flow is the key, so agitators, vibration and fluidization aids are added for bridging or sticky powders to maintain a steady mass flow.