Hot Melt Roll Coater with Synchronized Dual Rollers & Nip Compression
Product Overview
This customizable roll coater is a continuous coating system that applies precise layers of paints, adhesives, functional coatings, or hot melts onto flat or flexible substrates. Available in industrial wide-format, laboratory roll-to-roll, and hot melt configurations.
The system is fully customizable in coating width, roller configuration (2-roll / 3-roll / reverse roll), drying modules, and automation level. The roller coating method is suitable for large-area sheet and strip coating, offering high efficiency and ease of achieving continuous production.
Working principle: The coating is picked up by the applicator roll from the pan and transferred to the substrate. In reverse roll coating, the applicator roll rotates opposite to the substrate direction, providing better shear control and enabling ultra-thin, uniform coatings (down to 1-2 µm). This method is widely used for architectural paint on coil metal, thermal coatings, adhesives, and specialty optical applications.
Technical Specifications
| Parameter |
Industrial Wide-Format Model |
Laboratory Roll-to-Roll Model |
Hot Melt Roll Coater |
| Coating width (customizable) |
Up to 3,400 mm |
100 - 300 mm |
Up to 1,830 mm (6 ft) |
| Roller configuration (customizable) |
2-roll / 3-roll / Reverse roll |
2-roll / Slot die / Gravure |
Dual synchronized + Nip system |
| Line speed (customizable) |
0 - 300 m/min |
0.01 - 5.0 m/min |
0 - 350 m/min |
| Coating thickness range |
0.003 - 0.35 mm |
1 - 500 µm |
0.5 - 10 g/m² |
| Substrate types |
Metal sheets, panels, paperboard, MDF, wood |
Flexible films (PET, paper, Al foil) |
Textile, foam, carpet, insulation |
| Drying/curing options (customizable) |
Hot air / IR / UV |
Hot air / IR / UV / NIR |
Ambient cooling or forced air |
| Web tension control |
Load cells + edge guide |
Active NIP tension |
Manual or automatic |
| Control system |
PLC + HMI touchscreen |
PLC + recipe storage |
PLC + touchscreen |
| Power supply |
380V, 50/60Hz, 3-phase |
110/220V, 50/60Hz |
200-220VAC, 50/60Hz |
| Typical application |
Woodworking, metal coil coating, decorative boards |
R&D, pilot production, functional films |
Flooring, carpet backing, textiles |
Applications
- Woodworking & panels: Furniture, cabinets, decorative boards, MDF, plywood coating - primer & finishing coat painting
- Metal processing: Pre-painted metal coils, corrosion-resistant coatings, architectural coil coating
- Packaging industry: Barrier coatings (moisture/oxygen resistance), heat-seal layers, adhesive primers
- Flexible electronics & optics: Conductive layers, functional films, OLEDs, solar cells - slot die and gravure methods available
- Textile & flooring: Carpet backing, foam lamination, non-woven fabric coating
- Automotive & construction: Carbon fiber products, insulation panels, adhesive tapes
- Adhesive application: Hot melt or cold glue application for lamination
Customization Options
This roll coater is highly customizable to meet your specific production requirements:
- Roller configuration: Select from 2-roll direct, 3-roll inline, 3-roll V-type, or reverse roll configuration
- Coating width: Customizable from laboratory scale (100-300 mm) to industrial scale (up to 3,400+ mm)
- Coating method: Forward roll, reverse roll, differential roll, gravure roll, slot die
- Roller material & surface: Chrome-plated, rubber-covered (EPDM, polyurethane), ceramic-coated, or grooved rollers
- Roller gap & load control: Manual micrometer or servo motor automatic adjustment
- Speed ratio: Programmable applicator/pick-up roll speed ratios - customizable per process requirements
- Drying/curing system: Hot air, IR, UV, NIR - single or combined modules
- Substrate pretreatment: Corona treatment, web cleaning, plasma treatment
- Feeding method: Pan feed (for low viscosity) or nip feed (for high viscosity)
- Automation level: Manual, semi-automatic, or fully automatic with recipe management
- Clean-in-place (CIP): Remote solvent/water flushing system for roll and pan cleaning
- Roller quick-change system: Hinged bearings for simple cleaning and roller exchange
Key Features
- Precise thickness control: Adjustable roll gap and speed ratios enable coating thickness from 0.003mm with high accuracy
- High-speed continuous operation: Supports production speeds up to 300 m/min for gravure coating
- Excellent coating uniformity: Reverse roll and differential speed options minimize streaks and defects
- Wide material compatibility: Handles rigid panels, flexible films, textiles, foam, and metal sheets
- Paint saving: Roller coating saves up to 50% paint compared to manual spraying, with 100% paint utilization via recycle system
- Low maintenance: Solid cast-iron frame with vibration absorption, sealed bearings, easy-clean surfaces
- Safety features: Emergency stop, light curtains, safety interlocks, protective hood with safety logic
- Independent motor control: Conveyor belt, rubber wheel, and metering wheel controlled by independent motors for more accurate coating
Support and Services
- Free process consultation and material testing - send us your substrate for trial coating
- Custom layout design for your production floor
- On-site installation and commissioning (customizable support packages)
- Operator training program included
- Remote troubleshooting via video call or IoT monitoring
- 12-month warranty on mechanical components (wear parts excluded)
- Spare parts availability from regional warehouses
- Roller regrooving and reconditioning services
- Lifetime technical support via phone, email, or chat
Packing and Shipping
- Packing: Anti-rust film + reinforced plywood case for main body and control cabinet; foam padding for fragile components (rollers, control panel)
- Standard model lead time: 15-25 days after order confirmation
- Custom configuration lead time: 30-50 days (longer for custom rollers or drying modules)
- Shipping: FOB Shanghai / CIF by sea, air, or rail
- Customizable: Export crating, custom labeling, destination port documentation
Frequently Asked Questions
Q1: What is the difference between a 2-roll and a 3-roll coater?
A: A 2-roll coater transfers coating directly from the applicator roll to the substrate - suitable for thicker coatings. A 3-roll coater adds a metering/doctor roll between the pick-up roll and applicator roll, providing more precise coating thickness control. The configuration is customizable based on your application requirements.
Q2: What is reverse roll coating and when should I use it?
A: Reverse roll coating occurs when the applicator roll rotates opposite to the substrate direction, providing better shear control and enabling ultra-thin, uniform coatings (down to 1-2 µm). It is ideal for precision applications like architectural coil coatings, thermal coatings, and optical films.
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