Coating Machine
Solid Preparation
Coating Machine
Model: CTG Series
1. Product Overview
The coating machine is a core piece of equipment in solid dosage production, applying one or more functional coatings to the surface of tablets, pills, granules, and other solid dosage forms. Coating improves product appearance, masks unpleasant odors, protects the drug from environmental factors, controls release rates, and enhances stability. The machine sprays coating solution uniformly onto tablets tumbling inside the rotating pan while hot air dries them, forming a continuous, uniform, and dense film. It is widely used in the pharmaceutical, food, and nutraceutical industries.
Key Features
- High coating uniformity, film thickness deviation≤±5%
- Multi-functional: film coating, sugar coating, enteric coating, sustained-release coating
- Efficient hot air drying system, short coating time
- Variable frequency speed control, precise process control
- Fully automatic PLC control, recipe management, data logging
- GMP compliant, CIP/SIP optional
2. Working Principle
Film Coating
Tablets tumble continuously in the coating pan while the coating solution is atomized by high-pressure airless or dual-fluid spray guns and deposited evenly onto their surfaces. Hot air blown from the side or bottom of the pan rapidly evaporates the solvent to form the film. Film coating is fast (30–120 min) with a weight gain of 2%–5% and is the most widely used coating method.
Sugar Coating
This traditional syrup-based process builds the coat in layers: sealing, subcoating, syrup, colour, and polishing. It takes longer (6–12 hours) with a weight gain of 50%–100%, yet yields the smooth, attractive finish that keeps it in demand.
Enteric Coating
Enteric materials (e.g., L-type acrylic resin, cellulose acetate phthalate) withstand gastric acid yet dissolve in the intestinal environment to release the drug. Precise control of film thickness and uniformity ensures release at the correct site.
3. System Classification
By Working Method
1. High-Efficiency Coater (Perforated Pan)
2. Sugar Coater (Non-perforated Bowl Pan)
3. Fluid-Bed Coater (Bottom/Top Spray)
By Equipment Type
1. Laboratory type (0.5–5kg/batch)
2. Pilot type (5–50kg/batch)
3. Production type (50–500kg/batch)
By Application Field
1. Pharmaceutical Industry
2. Nutraceutical Industry
3. Food Industry
4. Confectionery Industry
4. Detailed Technical Parameters
Basic Parameters
| Parameter | Specification |
|---|---|
| Model | CTG-10 / CTG-30 / CTG-50 / CTG-100 / CTG-200 / CTG-500 |
| Batch Capacity | 0.5–500 kg |
| Pan Diameter | 200–1500 mm |
| Pan Speed | 2–30 rpm (VFD adjustable) |
| Spray Rate | 5–200 g/min |
| Inlet Air Temperature | 40–80℃ (film coating); 30–50℃ (sugar coating) |
| Air Volume | 200–6000 m³/h |
| Weight Gain | 2%–5% (film); 30%–100% (sugar) |
Specification Parameters
| Model | Batch(kg) | Pan Dia.(mm) | Speed(rpm) | Spray(g/min) | Power(kW) |
|---|---|---|---|---|---|
| CTG-10 | 0.5–3 | 200 | 5–30 | 5–20 | 0.75 |
| CTG-30 | 3–10 | 400 | 4–25 | 10–50 | 1.5 |
| CTG-50 | 10–25 | 600 | 3–20 | 20–80 | 3.0 |
| CTG-100 | 25–80 | 800 | 3–18 | 40–120 | 5.5 |
| CTG-200 | 80–150 | 1000 | 2–15 | 60–150 | 7.5 |
| CTG-500 | 150–500 | 1500 | 2–12 | 100–200 | 15 |
Dimensions
| Model | Length(mm) | Width(mm) | Height(mm) |
|---|---|---|---|
| CTG-30 | 1200 | 900 | 1500 |
| CTG-50 | 1500 | 1100 | 1700 |
| CTG-100 | 1800 | 1300 | 2000 |
| CTG-200 | 2200 | 1600 | 2300 |
| CTG-500 | 3000 | 2200 | 2800 |
Material Properties
| Component | Material | Description |
|---|---|---|
| Coating Pan | SUS316L | Perforated/Non-perforated, polished Ra≤0.4μm |
| Housing | SUS304 | Fully enclosed, mirror polished |
| Spray Gun | SUS316L | Airless/Dual-fluid optional |
| Seals | Silicone/PTFE | FDA certified, -20–200℃ |
5. Core Component Selection
Coating Pan
SUS316L stainless steel. Perforated pan with laser-drilled holes, 1.5–2.5mm diameter, 15%–25% open area for uniform hot air penetration. Electropolished interior, Ra≤0.4μm. Tilting discharge mechanism.
Spray System
High-pressure airless or dual-fluid spray guns. Airless guns for film coating; dual-fluid for enteric coating. Adjustable spray angle and distance. Precision peristaltic pump for stable flow.
Hot Air Drying System
High-efficiency hot air circulation, inlet temperature 40–80℃ adjustable. Steam/electric/thermal oil heating options. H13 HEPA filter for clean air. Exhaust air dust-filtered before discharge.
Drive System
VFD motor, pan speed 2–30rpm adjustable for different tablet sizes and coating processes. SEW/NORD reducer, smooth operation, noise≤65dB.
Control System
SIEMENS/AB PLC controller, 10–15 inch touchscreen HMI. Inlet temperature, pan speed, spray rate, and spray time parameters. Recipe management for 50+ process recipes. 21 CFR Part 11 compliant data logging.
6. Typical Application Fields
Film Coating
Immediate-release film coating, enteric film coating, sustained-release film coating, taste-masking coating, moisture protection coating, aesthetic color coating
Sugar Coating
Traditional sugar-coated tablets, multi-layer sugar coating, TCM pill coating
Nutraceutical Coating
Vitamin tablet coating, mineral tablet coating, fish oil softgel coating
Food Coating
Candy coating, nut coating, chewing gum coating
7. Design Standards & Certifications
Complies with the following standards and certifications
1. GMP (Good Manufacturing Practice)
2. FDA 21 CFR Part 210/211
3. ISO 9001 / ISO 14001
4. CE Certification
5. GB/T 28669-2012 General Technical Requirements for Pharmaceutical Machinery
8. Custom Optional Configurations
| Option | Details |
|---|---|
| Pan Type | Perforated / Non-perforated / Bowl type |
| Spray System | Airless / Dual-fluid / Pressure spray gun |
| Heating Method | Steam / Electric / Thermal oil |
| Batch Size | 0.5/3/10/25/80/150/500 kg |
| Material Upgrade | Full SUS316L stainless steel |
| Control Mode | Manual / Semi-auto / Full-auto PLC |
| CIP/SIP | CIP/SIP connection (optional) |
| Explosion-proof | Ex d IIB T4 (optional) |
| In-line Monitoring | NIR in-line detection (optional) |
9. Warranty Terms
| Equipment Status | Warranty Period | Warranty Scope |
|---|---|---|
| New Equipment | 12 months | Coating pan, spray system, hot air system, drive system, electrical components |
| Refurbished Equipment | 6 months | Drive system, spray system, electrical components |
10. Packaging & Delivery
| Item | Packaging Method |
|---|---|
| Main Unit | Anti-rust treatment, plastic film wrapped, wooden crate secured |
| Spray Gun System | Individually sealed packaging, impact protected |
| Electrical Box | Moisture-proof treated, individually packaged |
| Accompanying Documents | Waterproof bag sealed |
Lead time: New equipment 60–90 working days; Refurbished equipment 30–45 working days.
11. Information Required for Inquiry
To receive an accurate quotation, please provide the following information:
Coating type (film/sugar/enteric/sustained-release)
Tablet diameter and shape
Required batch capacity (kg)
Weight gain requirement (%)
Coating solution type (aqueous/organic solvent)
Material requirements (SUS304/SUS316L)
Heating method preference
Control mode preference
Local voltage and frequency
Explosion-proof requirements (if needed)
CIP/SIP requirements (if needed)
Equipment preference: New/Refurbished
Budget range and brand preference
Delivery terms and destination port