The high-efficiency film coating experimental machine is a core equipment in the field of pharmaceutical preparations, which achieves surface coating of solid drugs such as tablets and pills through precise control, forming a uniform and sturdy film coating layer. This technology is widely used to mask drug odors, prevent moisture and light, and improve formulation stability, and is an important innovation in modern pharmaceutical processes. The process principle integrates mechanical dynamics, thermodynamics, and materials science to ensure that the coating process is efficient, controllable, and in compliance with pharmaceutical production standards.
1、 Core working principle
The operation of the high-efficiency film coating experimental machine is based on the physical and chemical processes of dynamic equilibrium. The core of the equipment is the rotating drum, which is equipped with streamlined guide plates inside, allowing the coated granules (such as tablets or pellets) to roll along complex trajectories in a closed environment. The coating solution is atomized into tiny droplets through an automatic spray device and evenly sprayed on the surface of the pistil. At the same time, the hot air system introduces clean hot air from the center of the drum, penetrates the material layer, and is discharged through the exhaust port to achieve rapid evaporation of the solvent and solidification of the coating film. The key to this process is to maintain a dynamic balance between the injection amount and evaporation amount, ensuring uniform and defect free film formation.
2、 Key process steps
1. Material loading and preparation: The core is placed inside the drum to ensure even distribution and avoid local accumulation; The coating solution is precisely prepared according to the formula and loaded into the spray gun barrel.
2. System preheating and stabilization: Start the heating device and fan to raise the temperature of the air inside the drum and form a circulating airflow, reaching a stable state of preset temperature and wind speed.
3. Spray and coating: the spray gun atomizes the coating liquid according to the set parameters, and the stamen absorbs the liquid drops evenly in the tumbling; Hot air accelerates solvent evaporation, gradually solidifying the clothing material.
4. Drying and finished product processing: Continuously dry with hot air until the film reaches the expected thickness, and discharge the exhaust gas after dust removal. The finished product is taken out from the drum.
3、 Technical advantages and equipment characteristics
The high-efficiency film coating experimental machine has significant advantages compared to traditional methods:
1. Uniformity and efficiency: Three dimensional dynamic mixing and intelligent spray gun adjustment ensure consistent film coverage and reduce material waste.
2. Automation control: Integrating PLC system to accurately regulate temperature, pressure, and time, achieving programmable process parameters, improving repeatability and quality stability.
3. Cleanliness and Safety: Sealed design to prevent contamination, in compliance with pharmaceutical production standards, suitable for film coatings, water-soluble coatings, and sustained-release formulations.
The equipment usually uses corrosion-resistant materials, such as stainless steel pot bodies, and is equipped with millisecond level temperature control devices to meet diverse production needs.
4、 Application and Quality Control
This technology is not only used in pharmaceuticals, but also extends to the food and chemical industries, such as candy coating and particle polishing. Quality control relies on precise monitoring of process parameters, such as evaluating the integrity of the coating film through heat sealing strength testing, to ensure drug shelf life and safety. The automation characteristics of the experimental machine make it an ideal choice for research and large-scale production, promoting the development of formulation processes towards high efficiency and environmental protection.