Dosing powders in injection molding or extrusion applications is a very specialized business. We successfully incorporated the experiences of powder manufacturers and plastic producers worldwide into the product development process of our powder dosing systems. With Movacolor powder dosing systems, plastic producers can save up to fifty percent on expensive powder additives.
Powder dosing with a gravimetric or volumetric dosing feeder
Non-free flowing powders and heavy duty powders can be dosed trouble-free with a gravimetric feeder or volumetric feeder of Movacolor. The decision which feeder to choose is whether you decide to go for a small investment and choose a volumetric feeder or save money on the long term an choose a highly accurate gravimetric feeder.
The closed loop and the loss-in-weight technology of a gravimetric feeder offers maximum efficiency and saving when it comes to powder dosing. Movacolor’s gravimetric and volumetric feeders for powder dosing are both equipped with a single or double spiral and driven by a stepper motor. This together with the continuous excitation in the high grade polished hopper of the powder dosing system ensures a steady flow of powder into the main material stream.
Most of our volumetric feeders require manual calibration. This is in contrast to our gravimetric feeders, all of which are equipped with an automatic calibration function. The volumetric MDS 6 feeder / dosing unit of Movacolor is an exception on the other volumetric feeders and can be pre-calibrated to dose at percentage rates.