Qingguo Intelligent is a leading China fully automatic powder spraying equipment manufacturer. The fully automatic powder spraying equipment is an efficient and advanced powder coating application system. Here is a detailed introduction:
Powder feeding system
In fully automatic powder spraying equipment, the powder feeding system usually consists of a powder hopper, a powder pump, and a powder supply pipeline. The powder hopper stores powder coating. The powder pump is responsible for accurately delivering the powder to the spray gun at a consistent rate. For example, in high-quality automatic powder spraying equipment, the powder pump can adjust the powder output according to the set spraying parameters, ensuring stable powder supply even during continuous operation.
The design of the powder supply pipeline is to smoothly transport the powder from the hopper to the spray gun. It is usually made of materials that can prevent powder blockage and static electricity accumulation.
Spray gun
There are different types of automatic spray guns. Electrostatic spray guns are very common. The working principle of these guns is electrostatic attraction. The powder particles become charged when leaving the spray gun, and the grounded workpiece attracts the charged powder. This makes the coating process more efficient and the powder utilization rate higher. For example, in the automotive parts manufacturing industry, electrostatic spray guns can evenly spray complex shaped parts such as engine cylinders and wheels.
Spray guns are usually installed on robotic arms or fixed spraying mechanisms. The spray gun equipped with a robotic arm has high flexibility and can adjust the spraying angle and distance according to the shape of the workpiece. They can accurately cover the surface of the workpiece, including corners and grooves.
Spray booth
The paint booth provides a controlled environment for powder coating. Its design purpose is to control excessive powder spraying and prevent it from spreading to the surrounding area. Exhibition booths are usually equipped with air filtration systems to ensure good internal air quality. The airflow pattern inside the booth has been carefully designed to direct excess sprayed material towards the powder recovery system.
The walls of the paint booth are usually made of materials that are easy to clean, such as stainless steel or special plastic coatings. This is because powder coating accumulates on the booth walls during the spraying process, and the easy to clean material simplifies the maintenance process.
Powder recycling system
The powder recycling system plays a crucial role in reducing waste and costs. There are mainly two types: wet and dry recovery systems.
Dry recycling systems, such as cyclone separators, use the principle of centrifugal force to separate powder from air. The powder particles are collected and can be reused. In well-designed automatic powder spraying equipment, cyclone separators can achieve high recovery rates, typically above 90%.
The wet recycling system involves passing air containing powder through a chamber filled with liquid. The powder is trapped in the liquid, and then the liquid powder mixture is processed to recover the powder. This type of system is highly effective for processing fine-grained powders and is typically used in applications that require high-level air purification.
Control system
The control system is the "brain" of the fully automatic powder spraying equipment. It allows operators to set various spraying parameters, such as spraying speed, powder output, and electrostatic voltage. The control system can also monitor the status of equipment in real time, including the operation of spray guns, powder supply, and air filtration systems.
Advanced control systems can store multiple spraying programs for different workpieces or coating requirements. For example, for factories producing various metal products, the control system can quickly switch between different spraying programs to meet the specific needs of each product.
The workpiece is first cleaned and surface treated to ensure good adhesion of the powder coating. Then, it is transported to the paint booth through a conveyor belt or robot handling system.
The powder is transported from the powder hopper to the spray gun through the powder pump and pipeline. When the spray gun sprays powder, the powder particles become charged (in the case of electrostatic spraying) and are attracted to the surface of the workpiece.
The airflow in the paint booth guides excess sprayed material to the powder recovery system. The recycled powder is then filtered and, if necessary, reprocessed before being returned to the powder hopper for reuse.
After spraying is completed, the workpiece is usually transferred to a curing oven, where the powder coating solidifies under certain temperature and time conditions, forming a hard and durable surface.
high efficiency
The fully automatic powder spraying equipment can operate continuously, and compared with manual spraying, the production speed is significantly improved. It can process a large number of workpieces in a short period of time, meeting the needs of mass production. For example, in the production of metal furniture, dozens of chair frames or table legs can be sprayed every hour.
High quality coating
Accurate control of spraying parameters can ensure uniform and consistent coating thickness. The electrostatic spraying method can also make the powder adhere better to the workpiece, improving the quality of the finished product. The coatings obtained are usually more durable, corrosion-resistant, and have a better appearance than coatings obtained by other methods.
Environmentally friendly
Powder coatings are usually more environmentally friendly than liquid coatings because they do not contain solvents that can evaporate and cause air pollution. The efficient powder recycling system further reduces waste and environmental impact. For example, the powder recovery rate of advanced equipment can minimize powder waste, which is beneficial for sustainable production.
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