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High-Precision Knife-Over-Roll Coating Line for XPS Foam Board Surface Levelling & Smoothing
Our High-Precision Knife-Over-Roll Coating Line is specially engineered for applying uniform cementitious, polymer, or acrylic coatings onto XPS foam boards. Using a rigid doctor blade precisely positioned above a precision-ground backing roller, the machine ensures exceptionally consistent coating thickness across the entire board width. The system effectively fills surface pores, hides foam texture, and creates a perfectly smooth, level base for exterior insulation finishing systems (EIFS), decorative renders, or protective layers.
Production Line Composition
Module
Description
1. Automatic Infeed Conveyor
Roller or belt conveyor with side guides for accurate XPS board positioning
2. Surface Pre-Treatment Unit (Optional)
Corona, plasma, or flame treater to increase surface energy for better coating adhesion
3. Knife-Over-Roll Coating Station
Precision doctor blade assembly with adjustable gap and high-accuracy backing roller
4. Coating Material Supply System
Pump and circulation system with viscosity control and filtration
5. Leveling & Drying Conveyor Section
Multi-zone hot air or IR drying tunnel for rapid curing
6. Cooling Zone
Forced ambient air cooling to stabilize the coated board
7. Automatic Stacking/Unloading Unit
Pneumatic or servo-driven stacker for finished panels
8. Central Control Cabinet with HMI
PLC-based system with touchscreen for parameter setting, recipe storage, and real-time monitoring
Technical Specifications
Category
Parameter
Specification / Description
Workpiece Dimensions
Max. Board Width
Customizable (Standard: 600mm, 1200mm, 1350mm)
Board Length
Unlimited (continuous process)
Board Thickness Range
10 - 200 mm (adjustable roller gap)
Coating Parameters
Coating Method
Knife-over-roll (doctor blade)
Coating Thickness (Wet)
Customizable from 0.5 mm to 10 mm (stepless adjustment via micrometer)
Coating Thickness Tolerance
±0.1 mm across the entire width
Coating Material Viscosity
Suitable for low to high viscosity (100 - 100,000 cP)
Mechanical Specs
Blade Material
Hardened stainless steel or tungsten carbide tip (optional)
Energy-Efficient Drying - Multi-zone hot air recycling with heat recovery option
Support and Services
Pre-Sales Engineering - Free layout design, line simulation, and coating feasibility testing
Installation & Commissioning - On-site setup and fine-tuning by senior engineers
Training - Comprehensive training for operators and maintenance personnel
Warranty - 18 months on main machine, 12 months on electrical parts
After-Sales Support - Lifetime technical consultation, spare parts supply, and remote diagnostics
Packing and Shipping
Packing - Modules disassembled, wrapped in anti-rust oil, sealed with stretch film, packed in export-grade plywood crates
Marking - Clear shipping marks, lifting points, and fragile labels
Shipping - Sea freight (FOB, CIF, EXW terms) or air freight for urgent orders with full customs documentation
Lead Time - Standard customized models: 10-12 weeks after order confirmation
Frequently Asked Questions
What types of coating materials can this line apply onto XPS?
It works perfectly with cementitious mortars (EIFS base coat), acrylic renders, polymer-modified adhesives, gypsum-based plasters, and flame-retardant paints. The material viscosity range is broad, and the pump system can be customized accordingly.
Does the line damage the soft XPS foam surface?
No. The backing roller is soft (rubber-coated or polyurethane) to protect the foam, while the doctor blade only contacts the coating paste. The conveyor support also has low-pressure contact points.
How do you ensure consistent coating thickness across the entire board width?
The precision-ground backing roller, combined with a rigid blade holder and micrometer adjustment at both ends, ensures linear blade flatness within ±0.05 mm across the full width. Automatic blade wear compensation (optional) further improves consistency.
Can this machine apply two layers in one pass?
A dual-head configuration (two scraper stations) can be customized to apply a second layer immediately after the first drying or semi-drying stage, saving space and handling time.
What is the typical drying time for a 3mm cementitious coating on XPS?
At 80°C with forced air circulation, drying takes approximately 10-15 minutes depending on moisture content. Our drying tunnel length can be customized to match your required line speed.
Do you offer a sample coating trial?
Yes. Send us your XPS boards and coating material, and we will run trials at our lab facility. We will provide coated samples, optimized process parameters, and a video report.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2007
Total Annual:
2000000-3000000
Employee Number:
150~200
Ecer Certification：
Verified Supplier
Company Profile
Dongguan Osmanuv Mechanical Equipment Co., Ltd. is a design, research, development, manufacturing as one of the UV equipment, UV equipment and coating, infrared IR equipment, professional production enterprises, automation equipment, environmental equipmen...
Company Profile
Dongguan Osmanuv Mechanical Equipment Co., Ltd. is a design, research, development, manufacturing as one of the UV equipment, UV equipment and coating, infrared IR equipment, professional production enterprises, automation equipment, environmental equipmen...
