During the pharmaceutical blending process, lubricants are mixed with excipients and the active pharmaceutical ingredient (API), before being compressed in a tablet press. Lubricants are added to prevent powders from sticking to the tablet press tools. However, there is often a tendency for the mixture to become overly lubricated, leading to particle agglomeration. Applying lubricant directly to the tablet press tools, on the other hand, can significantly reduce adhesion between the punch and die—a method that’s far more precise and easier to control.

When using dry powdered wax, sugar, or opaque extenders during the coating process, it can be challenging to ensure these powders are evenly delivered to the coating nozzle. By combining a twin-screw feeder with a Venturi-type gas injection system, you can achieve uniform and precise dispersion of the powder within the airflow. Additionally, incorporating a gravimetric feeder not only offers greater control but also allows for accurate measurement and recording of the exact amount of powder being added.