Pharmaceutical Tablet Coating Machine : Specification

Introduction:

A tablet coating machine adds a thin layer on the external surface of e.g., a pharmaceutical tablet. The tablet coating machine mechanism is essential in several ways; for instance, it enhances drug appearance making them attractive and easy to consume. The activity reduces the obnoxious color, smell, and taste that comes with the drugs. The coat facilitates the identification of drugs and acts as a mask in cases of change in environmental factors to prevent drug degradation.

Parts of a Tablet Coating Machine:

Automated control system : The part controls the various functions automatically, for instance, operation of the machine, and the regulation of speed, pressure, and temperature.

Electric motors : They facilitate various tablet coating machine operations such as blowing air, mixing, and pressure creation.
The touch screen operating panel facilitates observation, the input of controls, and monitoring by an operator with a user-friendly interface.

Guide plate: It allows for the smooth tumbling of the tablets when blowing hot air through them during the drying process.
Peristaltic pump ensures constant pressure in the machine. During the spraying process, the pump aids in the stabilization of the atoms.

Spraying system: Components of this part are the nozzle, tank, and a pump, where it stores the tablet coating solution, ensures atomization stability, cleaning, and maintenance of the spraying pump.The Pan cooling surface consists of an automatic load cell system that helps in regulating the volume of the spraying solution. Its components include the electronic pulse valve, a discharging device, an exhaust dust collector, an air heating unit, and an air distribution device.

Coating preparation tank: The part facilitates the preparation of the coating solution

Working Principle of Pill Coater:

Select the suitable coating materials depending on the kind of tablets you are using and the desired coating. The next process is tablet spinning, whereby the tablets are put in a drum and rotating it in an orbital way, the streamlined plates control most of the operations. As the drum spins, the nozzle sprays a coating solution regulated by an automated control system. The system ensures accuracy and even spray of the coating on the tablets. As the spraying continues, the machine pumps hot air into the drum resulting in a rapid coat of the solution. It self-regulates the same temperature to ensure a good condition of the drugs’ composition. When the desired coating achieves, spinning and spraying ends, the tablets proceed to the drying section where air flows over them. The volume of air is also regulated to ensure no reaction with the pills, and this is how the tablet coating machine works before the packaging process.

Types of Tablet Coating Machines :

There are three types of Tablet Coaters:

Standard coating pan: It consists of a circular metal with a diameter of 6-8 inches. It is slightly tilted 45 degrees to the benchtop and has an electric motor that rotates a metal pan horizontally to its axis. Improper balancing of inlet and exhaust air is a shortcoming experienced, which can be collected by adding components such as immersion tube system, immersion sword, baffled pan, and diffuser.

Perforated coating plan: Consists of either a fully or partially perforated drum and features a horizontal axis rotation of the drum. It displays an efficient drying system and a high tablet coating machine capacity.

Fluidized bed coater: It works by turning material particles for coating into a fluid followed by spraying.

The various types have a ground in the medical industry for pharmaceutical drug manufacturing and the cosmetic industry, where they add color on their products to make them attractive for sales increase.

Recommended Operations for minimizing coating defects:

Spray rate: A low spray rate results in insufficient wetting, creating a brittle coat while a high spray rate over wets the tablets making them too sticky. Ensure the right spray rate before you begin the operations.

Air capacity: Air aids in drying the coated tablet, ensure sufficient air supply to prevent the occurrence of defects.

Coating composition: The operator must caution the proper mixing of materials to prevent defects such as a blockage.
Rotation speed should not exceed optimum levels, and to achieve proper equipment efficiency, ensure all other components are operating at optimum levels under appropriate regulation of the processes.

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