Tablet Coating Machine

The tablet coating machine is a piece of pharmaceutical equipment used to apply a coating to tablets or pills. The coating serves several purposes, including masking the taste of the medication, protecting the tablet from environmental factors, controlling the release of the active ingredient, and improving the tablet's appearance.

Tablet Coating Machine Principle

The principle of a tablet coating machine revolves around the process of applying a thin, uniform layer of coating material onto tablets, which helps in enhancing their appearance, protecting the contents, and controlling the release of the drug.

Coating Process

Tablet Preparation: Tablets are fed into a rotating drum or pan in the machine.

Spraying Coating Solution: A coating solution, which typically consists of polymers, plasticizers, colorants, and solvents, is sprayed onto the tablets while they are being tumbled in the pan. The coating solution is atomized into fine droplets using a spray nozzle.

Drying: The coating material is dried by warm air or a drying system, allowing it to adhere to the surface of the tablets and form a thin, uniform layer. The drying process also ensures that the solvent in the coating evaporates.

Rotation and Tumble: The rotation and tumbling of the tablets ensure that the coating is evenly distributed over the tablet's surface, while also preventing tablets from sticking together.

Layer Building: Multiple layers of coating may be applied to achieve the desired thickness and quality of the final product.

Coating Machine Key Construction Materials

Stainless Steel: The majority of the coating machine for tablets, including the pan, nozzles, and structural frame, is made of stainless steel, ensuring durability, resistance to corrosion, and easy cleaning.

Polymeric Materials: Certain parts, such as seals and gaskets, are often made of food-grade, non-reactive polymers to prevent contamination.

Glass/Polycarbonate: Windows or panels in the chamber might be made of transparent materials like glass or polycarbonate, enabling the operator to monitor the process.