24-Station Rotary Coating Line for Internal Coating of Pulp Molding
This fully automated 24-station rotary coating production line is engineered for high-efficiency internal application of functional barrier coatings, primers, or decorative finishes to three-dimensional pulp molded products. Utilizing a precision rotary indexing system, it ensures each product receives identical, controlled coating coverage and thickness in a continuous, synchronized process. The system is highly customizable to accommodate a wide range of product sizes and shapes, making it ideal for large-scale manufacturing.
Production Line Composition
- Automated Infeed Conveyor & Product Orienter
- Customizable 24-Station Rotary Indexing Table with Precision Turntable
- Individual Coating Head per Station (Dipping, Spraying, or Precision Dispensing)
- Centralized Coating Material Supply & Recirculation System
- Integrated Drip/Drain Station
- In-process Drying/Curing Modules between Stations (Optional IR/UV/Hot Air)
- Quality Inspection Station (Optional Vision System)
- Automated Outfeed & Sorting Conveyor
- Centralized PLC Control Panel with Industrial HMI
Technical Specifications
| Parameter Category |
Details & Specifications |
| Number of Work Stations |
24 stations (standard), customizable to 12, 18, or 36 stations |
| Coating Method per Station |
Precision rotary spin coating, dip coating, or spray coating (customizable) |
| Indexing System |
Precision cam divider or servo-driven rotary table |
| Cycle Time |
Adjustable, typically 6-20 seconds per station (dictates line speed) |
| Coating Material |
Compatible with water-based, solvent-based, or UV-curable coatings |
| Material Supply |
Centralized tank with pump, filtration, and viscosity control (optional) |
| Control System |
Industrial PLC with recipe management for different products |
| Power Requirements |
380V / 50Hz / 3-Phase, customizable to regional standards |
| Line Footprint (LxW) |
Customizable based on station size and auxiliary modules (e.g., ~10m x 5m) |
| Overall Capacity |
Up to 500-1500 pieces per hour (dependent on cycle time and product) |
Applications
- Food service items (plates, bowls, clamshells, cups)
- Egg cartons and fruit trays
- Industrial protective packaging
- Premium gift packaging
Key Features
- High Throughput & Consistency: 24-station parallel processing ensures identical coating quality for every piece at high speed
- Reduced Material Waste: Precise, controlled application minimizes overspray and coating usage
- Flexible Production: Quick-change fixtures and PLC recipes allow for running different product types with minimal downtime
- Closed-Loop Control: Optional viscosity and level sensors maintain coating material consistency
- Rugged Construction: Built for 24/7 operation in humid industrial environments
Customization Options
The entire line is built to order with extensive customization options. These include the number of stations, the specific coating mechanism per station (to handle different product geometries), the integration and type of drying systems between steps, material handling fixtures, and full integration with upstream (forming) and downstream (packaging) equipment.
Frequently Asked Questions
Can this line handle different sizes of pulp molded products simultaneously?
Not simultaneously. However, through customizable quick-change fixtures and saved PLC recipes, the line can be rapidly converted between different product families in a batch production mode.
How is coating uniformity ensured across all 24 stations?
Each station is equipped with its own individually calibrated coating head and fluid control system, all supplied from a common, agitation-equipped reservoir to ensure material consistency. The rotary indexing mechanism ensures identical dwell and process time at each station.
What about curing? Is it part of the line?
Curing can be integrated. We can design the line with intermediate drying stations (e.g., between coating steps) and a final curing tunnel as part of the customized layout, creating a complete "coated-and-dried" output.
How is maintenance handled for so many coating heads?
The design emphasizes modularity and easy access. Heads can be individually serviced or replaced without stopping the entire line. We provide detailed maintenance manuals and training.
What is the typical project timeline from order to commissioning?
For a customized 24-station line, the timeline typically ranges from 20 to 30 weeks, covering detailed engineering, manufacturing, factory testing, shipping, and on-site installation. A precise schedule is provided upon project finalization.