With the growth of metal, automotive and household appliances industries in Iran, the need for high-quality, hygienic and cost-effective painting has become more important than ever. Electrostatic powder paint technology has replaced liquid paint systems as a green and corrosion-resistant method. Companies specializing in the production of powder paint line equipment play a key role in improving the final quality and optimizing energy consumption.
🔹 The overall process and structure of the powder paint line
The powder paint line consists of several consecutive sections, each of which has a functional task in pre-treatment, color application and stabilization.
The main components are:
1. Washing and surface preparation system
2. Powder spraying cabin
3. Paint recycling unit
4. Electrostatic spraying device
🔹 1. Washing and degreasing system
This part is considered the first step of the operation and has a direct effect on the adhesion of the paint.
- Common methods: multi-stage spray or immersion
- Material of tanks: stainless steel 304 or 316
- Chemicals: iron phosphate, zinc phosphate, or free chromium nanocoatings
High washing efficiency makes the final coating uniform and increases resistance against moisture and corrosion.
🔹 2. Powder spraying cabin
The cabin is the main place to apply paint. The passage of the piece through this section is done with the spraying of paint by electrostatic guns.
- Types of cabins: fixed, movable, or multi-colored (Quick Color Change)
- Body material: anti-static polypropylene
- Important feature: powder paint recycling up to 98% through the cyclone system
🔹 3. Electrostatic spraying device
By creating an electric field up to 100 kV, the powder particles are attracted to the surface of the part and a uniform coating is created.
- Ability to adjust: voltage, current and powder flow
- Application: automatic spraying with robot or manual
- Advantage: material saving and controlled thickness of 60-120 microns
🔹 4. Paint baking oven
Powder paint reaches its final strength only after melting and baking at a temperature of 220-180 degrees Celsius.
- Type of fuel: city gas, diesel or electric element
- Temperature control: digital thermostat and PID controller
- Body material: double-walled steel with 5 cm rock wool insulation
The uniformity of temperature throughout the furnace guarantees the glossiness and strength of the coating.
🔹 5. Transmission system (Conveyor)
This system has the task of continuously moving parts from the beginning of washing to the end of the furnace.
- Type: Overhead chain conveyor
- Load capacity: 50 to 200 kg/m
- Feature: can be adjusted with an inverter to match the speed of the line
🔹 6. Electrical and control panel
All the equipment is managed by the central switchboard with PLC and intelligent control (HMI Touch).
- Control of temperature, baking time, conveyor speed, gun flow and powder return amount.
🔹 Advantages of powder paint over liquid paint
| Feature | Powder paint Liquid paint |
| Color recycling up to 98% | Very limited |
| Energy consumption less | More |
| Environmental pollution No VOC | Has a lot of VOC |
| Impact and wear resistance up | Medium
| Maintenance cost down | Up |
🔹 quality criteria in the design and production of equipment
1. Optimum energy consumption and furnace output heat recovery
2. Operator ergonomics and user safety
3. The modularity of the design to develop the lines
4. Compliance with CE and ISO 9001
standardsEngineering Summary
Production of powder paint line equipment is not just an industrial assembly; Rather, it is a combination of surface engineering, process control, thermomechanics and precision electronics. The correct operation of the line depends on the quality and lifespan of each module.
In Iran, the development of internal manufacturing of these equipments, relying on local technical knowledge, can provide a large part of the needs of metal industries and automobile manufacturers and reduce import dependence.
Key Conclusion
The design and production system of powder paint line equipment must:
- Economical, safe, environmentally friendly and expandable.
- Provide high production efficiency with optimal energy efficiency.
- And finally, to indicate the technical and industrial maturity of the country.
تماس فوری
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