A complete coating line is more than the coating drum. Grand Machinery’s Coating Machine Auxiliary Equipment — including solution preparation tanks, hot air supply cabinets, exhaust cabinets, and CIP cleaning systems — is engineered to match our coating machines in capacity and control protocol, ensuring stable, reproducible coating results batch after batch.
From solution preparation to air treatment and drum cleaning, each auxiliary unit below covers one critical stage of the coating process — and all of them connect to Grand Machinery coating machines via pre-matched interfaces and a shared PLC protocol.
The Agitating and Holding Tank adopts an electric heating method and is equipped with a pneumatic agitator powered by compressed air. It features stable rotation speed, stepless speed regulation, and uniform mixing of media. Offering automatic temperature control from room temperature to 80°C, it is easy to operate and safe to use. The entire unit is constructed from stainless steel with mirror-polished inner and outer surfaces.
The Filter Cartridge Type Exhaust Cabinet is designed for efficient dust extraction and ventilation of the main coating drum while maintaining negative pressure in the working area. Featuring a filter cartridge structure with compressed air pulse cleaning, it achieves a filtration grade up to F9 (with options for H13 upon request) and includes a damping device. The exhaust outlet is equipped with an anti-backflow device to prevent exhaust gas from flowing back into the pipeline when shut down.
The Surface Cooling Type Hot Air Cabinet is an advanced air treatment and supply unit designed specifically for high-efficiency pharmaceutical coating systems. Operating via a centrifugal blower, air passes through primary, medium, and surface-cooling dehumidification stages, followed by a high-efficiency filter to achieve Class 100,000 clean air standards while effectively removing moisture. The dried, purified air is then heated via a heat exchanger (steam or electric) and delivered into the main coating drum, equipped with built-in damping devices for stable, low-noise operation.
CIP Cleaning System Working Principle: Tablet cores move continuously along complex trajectories within the clean, sealed, rotating drum of the coating machine, ensuring smooth tumbling and frequent turnover. Coating medium—agitated in a constant-temperature mixing tank—is pumped to spray guns and applied onto the tablet cores. Simultaneously, under the influence of hot air and negative pressure, Class 100,000 clean hot air supplied by the hot air unit passes through the tablet bed, exits via the bottom screen perforations, and is discharged through the exhaust damper. This process rapidly dries the coating medium on the tablet surfaces, forming a solid, dense, and
The Grand Machinery Integral High Efficiency Coating Machine integrates the coating drum, air handling, spraying, and exhaust systems into one compact, factory-assembled unit. Arrive, connect, and coat — the fastest route to a GMP-ready coating station.
Auxiliary equipment communicates with the main coating machine's PLC, so spray, air temperature, and exhaust run as one synchronized, recipe-controlled process.
Fully automatic spraying systems deliver consistent atomization and spray coverage across the tablet bed. Adjustable spray rate, gun count, and nozzle patterns allow precise control of coating weight gain and film uniformity.
Dehumidification, heating, and filtration are combined in one air handling unit, supplying clean, stable-temperature drying air — the single most critical factor for pinhole-free, uniform coating.
Every coating stage depends on an auxiliary unit doing its job quietly in the background. Use this configuration map to understand how the four units work together:
| Coating Stage | Auxiliary Unit | What It Guarantees |
| Solution preparation | Agitating and Holding Tank | Homogeneous suspension, stable temperature, no sedimentation |
| Drying air supply | Surface Cooling Hot Air Cabinet | Clean, stable-temperature air for uniform, pinhole-free layers |
| Air extraction & dust control | Filter Cartridge Exhaust Cabinet | Balanced negative pressure, clean workshop air, operator safety |
| Changeover & hygiene | CIP Cleaning System | Fast, validated cleaning for GMP compliance |
Send us your coating machine model, and we will configure the matching auxiliary line for free.
Coating defects are rarely the drum’s fault. Most coating quality problems — uneven film weight, pinholes, sticking and twinning, dull finish — trace back to unstable air, inconsistent solution, or unbalanced airflow:
Answers to the questions buyers ask most about our coating machine auxiliary equipment — covering how each unit works, which coating machines they match, and how to configure a complete coating line.
A typical configuration includes four units: an Agitating and Holding Tank for coating solution preparation, a Surface Cooling Hot Air Cabinet for drying air supply, a Filter Cartridge Exhaust Cabinet for dust extraction and negative pressure, and a CIP Cleaning System for changeover hygiene. Smaller lab setups may combine or simplify some of these — our engineers will configure the line based on your machine model and process.
They are pre-matched to Grand Machinery coating machines in capacity, airflow, and control protocol, and connect via quick-fit interfaces. If you operate another brand of coating machine, contact our team with your machine’s specifications — many units can be adapted.
It prepares and holds the coating suspension. Electric heating maintains solution temperature, while the compressed-air-driven pneumatic agitator keeps solids evenly suspended throughout the batch — preventing sedimentation, nozzle clogging, and uneven coating weight.
Drying air temperature and humidity are the most sensitive variables in film and sugar coating. The Surface Cooling Hot Air Cabinet treats and supplies air at a stable, programmable temperature and dew point, which is what makes coating layers uniform and pinhole-free batch after batch.
The Filter Cartridge Type Exhaust Cabinet extracts air and dust from the coating drum through high-efficiency filter cartridges, keeping the drum at a controlled negative pressure. This stabilizes airflow through the tablet bed, prevents dust from escaping into the workshop, and protects operators and the environment.
CIP (Clean-in-Place) cleaning rotates the drum with cleaning media so tablet cores move along complex trajectories inside the clean, sealed drum, scrubbing contact surfaces automatically. It replaces manual cleaning, shortens product changeover from hours to minutes, and supports GMP validation — especially valuable for contract manufacturers running multiple formulations.
Yes. Grand Machinery auxiliary equipment communicates with the main coating machine’s PLC, so solution preparation, air temperature, spray rate, and exhaust run as one synchronized, recipe-controlled process instead of separately adjusted units.
