Tablet coating machine

Tablet coating is the process of evenly covering particles with a substance by applying a series of thin layers .Sugar coating, for example provides a combination of insulation, taste masking, smoothing of the tablet core, coloring and modified release. Film coating, on the other hand, is usually a single stage process and easily adaptable for controlled release dosage forms. Tablets are loaded into the machine at the beginning of each batch. They tumble on a rotating drum while a coating liquid (solution, dispersion, or melt) sprays through nozzles onto their surface. Meanwhile, fans direct heated air through the tablets and the perforated drum, as shown below. This air either evaporates the solvent or cools the melt. Below are diagrams for fully perforated, to the left, and integrated plenum rotating pans, to the right. The integrated plenum pans operate effectively at lower airflows, which make them better suited for solvent coating applications