A modern tablet coating system combines several components:
- a coating pan,
- a spraying system,
- an air-handling unit,
- a dust collector, and
- the controls.
1. The Coating Pan
The coating pan is actually a perforated drum that rotates within a cabinet. The cabinet enables you to control airflow, air temperature, air pressure, and the coating application.
2. The Spraying System
The spraying system consists of several spray guns mounted on a manifold, a solution pump, a supply tank and mixer, and an air supply. The pump delivers the coating solution to the guns, where it combines with atomizing air to create a fine mist that is directed at the bed of tablets in the coating pan.
3. The Air Handling Unit
The air handling unit heats and filters the air used to dry the coating on the tablets. Depending on your circumstances, it may include a humidifier or dehumidifier.
4. The Dust Collector
The dust collector extracts air from the coating pan and keeps a slightly negative pressure within the cabinet.
5. The Control
The controls enable you to orchestrate the operation of all the components to achieve the desired results.