Large-Scale Spray Painting Equipment

I. Introduction

Large-scale spray painting equipment is a high-efficiency, intelligent
coating solution specifically designed for large workpieces. It is widely used
in automotive, shipbuilding, construction machinery, rail transit, and wind
power equipment industries.

II. Application Areas

• Transportation: High-speed rail carriages, heavy-duty trucks, and ship
  section coatings.

• Energy Equipment: Corrosion-resistant coatings for wind turbine nacelles,
  blades, and towers.

• Construction Machinery: Coatings for excavators, cranes, and tunnel boring
  machines.

• Defense & Aerospace: Surface treatment for large-scale equipment,
  storage tanks, and military vehicles.

III. Technical Overview

1. Basic Principles

• The system utilizes automated or semi-automated processes to evenly apply
  paint to large workpieces, forming a protective layer that enhances corrosion
  resistance, rust protection, and aesthetics.

2. Core Process Flow

• Automated Spray Painting Robots/Mechanical Arms

• Equipped with high-precision trajectory control systems, supporting
  multi-axis motion for complex surface painting.

• Programmable operation, compatible with water-based, oil-based, and powder
  coatings.

• Spray Booth (Spray Room)

• Enclosed structure with positive pressure air supply and multi-layer
  filtration (primary, medium, high-efficiency filters) to maintain a dust-free
  environment.

• Explosion-proof design with VOC (volatile organic compound) treatment
  systems (e.g., activated carbon adsorption, catalytic combustion).

• Workpiece Conveying System

• Customizable conveyor systems (such as overhead chains, roller beds, and
  rotating platforms) for large and heavy workpieces (e.g., truck bodies, wind
  turbine blades).

• Variable-frequency speed control, allowing continuous or intermittent
  operation.

• Drying & Curing System

• Infrared, hot air, or UV curing systems for rapid drying and improved
  production cycles.

• Uniform temperature control (±2°C) to prevent over-baking or
  under-curing.

• Intelligent Control System

• PLC/Industrial PC centralized control, integrated with HMI (Human-Machine
  Interface) for real-time monitoring of flow rate, pressure, and speed.

• Supports data tracking, fault diagnostics, and remote maintenance.

• Environmental Protection System

• Paint mist recovery (wet curtain or dry filter systems) with 98%+
  filtration efficiency.

• Exhaust gas purification (RTO, zeolite rotor) ensures compliance with GB
  16297 environmental standards.

IV. Technical Advantages

1. High Efficiency & Energy Saving

• 3-5 times faster than manual spraying.

• Paint utilization rate >85%, significantly reducing waste.

2. Superior Coating Uniformity

• Precise control of atomization pressure and spray width, preventing runs,
  orange peel, and uneven thickness.

3. Flexible Adaptation

• Modular design, customizable for workpieces up to 30m in length and 50 tons
  in weight.

4. Safety & Reliability

• Explosion-proof electrical systems, gas leak alarms, and emergency stop
  mechanisms ensure safety.

5. Eco-Friendly Design

• VOC emissions <50mg/m³, compliant with strict environmental laws such as
  China’s Air Pollution Prevention Act.

V. Development Trends

1. Larger Scale

• As workpiece sizes increase, spray painting equipment must scale
  accordingly.

2. Intelligent Automation

• Integration of robotics, AI, and real-time monitoring for smart spray
  painting.

3. Green & Sustainable Coating

• Adoption of low-VOC, eco-friendly coatings and advanced spray
  technologies.

4. High Efficiency & Energy Optimization

• Improved system design to enhance energy utilization and reduce operating
  costs.