Products Description
Helmet Automatic Spray Painting Line Process
I. Process Description
The helmet automatic spray painting line is a fully automated spraying system specially designed for helmet shells (made of ABS/PC/composite materials, etc.). It can realize continuous spraying and curing of primer, color paint and clear coat on the helmet surface. The whole process has high automation and convenient operation, which can effectively ensure the stability and uniformity of spray painting quality, greatly improve production efficiency, reduce labor intensity, and is suitable for mass production of various helmets such as motorcycle helmets, safety helmets and industrial protective helmets.
II. Complete Process Flow
1. Loading and Shell Pretreatment
The helmet shells that have undergone preliminary grinding and trimming are accurately placed on the special conveyor line fixtures through manual or automatic loading devices. The fixtures will position and clamp the shells to ensure that the shells do not shake or shift during the subsequent spraying process, laying a foundation for uniform spraying.
2. Dust and Static Removal Treatment
This is a key link to ensure the adhesion of the paint. Through the automatic dust removal brush combined with the ion air gun, the surface of the helmet shell is comprehensively cleaned to completely remove surface dust, impurities and debris; at the same time, the ions released by the ion air gun will neutralize the static electricity on the surface of the shell, avoiding static electricity from absorbing dust and affecting the spraying effect, and ensuring the paint surface is smooth and free of particle defects.
3. Preheating Treatment
The helmet shells that have undergone dust and static removal are sent to the preheating zone, and the surface temperature of the shells is controlled within an appropriate range (usually 40-60℃) by means of infrared heating or hot air heating. This measure can effectively remove the residual moisture on the surface of the shell, improve the fluidity and leveling performance of the paint, and avoid problems such as sagging and bubbles in subsequent spraying.
4. Automatic Spraying Operation
The spraying process is completed in a closed, constant temperature and humidity spray booth, using robotic spraying or reciprocating automatic spray guns. The spraying parameters (spray gun distance, spraying speed, paint dosage, etc.) are accurately controlled according to the preset program, and the spraying is completed in three steps:
Primer Spraying: Enhance the adhesion between the paint and the helmet shell, fill in the small scratches and defects on the shell surface, and provide a smooth base for subsequent color paint spraying;
Color Paint Spraying: Spray the specified color paint according to the product design requirements to form the main appearance color of the helmet, ensuring uniform color and no color difference;
Clear Coat Spraying: Spray a layer of clear coat on the surface of the color paint to improve the gloss of the helmet surface, and at the same time enhance the wear resistance, scratch resistance and weather resistance of the paint surface, extending the service life of the helmet.
5. Leveling and Flash Drying
The sprayed helmets are sent to the leveling and flash drying zone and left standing for a period of time at room temperature or low temperature. At this time, the paint surface will naturally level, removing the fine pinholes and flow marks generated during the spraying process, and at the same time allowing part of the solvent in the paint to volatilize, avoiding problems such as wrinkling and bubbles of the paint surface after entering the curing link.
6. Curing and Drying
According to the type of paint, the corresponding curing method is adopted: if ordinary solvent-based paint is used, it is sent to a hot air drying oven, and the paint surface is completely cured by constant temperature hot air (temperature 80-120℃); if UV paint is used, it is sent to a UV curing oven, and the paint surface is quickly cured by ultraviolet irradiation. The cured paint surface has high hardness and strong adhesion, and is not easy to fall off or scratch.
7. Cooling and Unloading
The cured helmets are sent to the cooling zone, and the temperature of the helmets is reduced to room temperature through natural cooling or forced air cooling to avoid deformation and damage of the paint surface caused by high-temperature unloading. After cooling, the helmets are removed from the fixtures through automatic unloading devices or manual methods and sent to the subsequent inspection and assembly processes.
III. Main Equipment Composition
Conveyor System: Adopt chain or overhead conveyor line to be responsible for the continuous transportation of helmets between various processes to ensure production continuity;
Spray Booth: Closed structure, equipped with constant temperature and humidity control system and air supply and exhaust system to ensure a clean and stable spraying environment;
Spraying Equipment: Automatic spray guns and spraying robots, which can accurately control the spraying trajectory and dosage, improving the spraying uniformity;
Paint Supply System: Including pressure tank, two-way paint supply pump, paint filter, etc., to ensure stable paint supply and no impurities;
Auxiliary Processing Equipment: Dust and static removal device, preheating furnace, leveling zone, curing oven, cooling device;
Control System: PLC control system, which can realize automatic operation, parameter adjustment and fault alarm of the entire production line.
IV. Process Advantages
High Automation: No manual intervention is required for core processes such as spraying and curing throughout the whole process, reducing manual operation errors and improving production stability;
Excellent Spraying Quality: The paint surface is uniform, with small color difference and high gloss, no particles, sagging, bubbles and other defects, and strong adhesion and wear resistance;
High Production Efficiency: Continuous mass production can be realized, and the daily output of a single production line can reach thousands of pieces, greatly improving production capacity;
Environmental Protection and Energy Saving: The closed spray booth is equipped with waste gas treatment device to reduce paint volatilization pollution; automatic control can save paint dosage and reduce production costs;
Wide Adaptability: The spraying parameters can be adjusted according to helmets of different specifications and shapes, adapting to the spraying needs of various helmet shells.
