Powder electrostatic spray gun: It is one of the core components of powder spraying equipment, which relies on high-voltage static electricity to "transport" powder to the workpiece to be sprayed. Its electrostatic and aerodynamic properties directly affect the powder coating rate and film thickness control. By precisely controlling the voltage, current, and airflow parameters of the spray gun, uniform and efficient powder spraying can be achieved.
Recycling device: There are two main forms commonly used: filter type and double cyclone. Filter type recycling relies on high-performance filtering devices (filter elements), which can recycle and use more than 99% of the powder spraying amount. It has a simple structure, easy maintenance, and is suitable for spraying operations with single colors or fewer color types; The dual cyclone recycling device is mainly used in color changing spray rooms, which has a fast color changing efficiency and can meet the needs of frequent color changes.
Powder room: The entire spraying process is enclosed in a relatively closed environment, and after precise calculation and reasonable production and processing, the powder will not overflow, avoiding environmental pollution and achieving the recycling and use of powder. Powder room wall materials usually include PP, PVC, and specialized Apogee, which have good corrosion resistance and sealing properties.
Powder supply device: generally composed of a powder bucket (containing spray powder) and a sieve. New powder can be directly added to the powder bucket, and the recovered powder is sieved through a sieve to remove impurities and reused, ensuring the quality of the powder and the spraying effect.
Excellent environmental performance: Powder coating is 100% solid content, free of organic solvents, and emits no volatile organic compounds (VOCs) during production and use. It does not cause pollution to the atmospheric environment, meets environmental requirements, and also improves the working conditions of workers.
High utilization rate of raw materials: During the powder spraying process, the powder that does not adhere to the workpiece can be collected and recycled through a recycling device. The utilization rate can usually reach over 95%, even up to 99%, greatly reducing material waste and lowering production costs.
Good coating quality: After pre-treatment, the powder coating can be applied in one go to obtain a coating with sufficient thickness, without the need for primer. The coating is dense, has strong adhesion, good impact strength and toughness, high edge coverage, excellent chemical corrosion resistance and electrical insulation performance, which can effectively extend the service life of the workpiece.
High production efficiency: Powder spraying is easy to achieve automated operation, and the motion trajectory and spraying parameters of the spray gun can be controlled through programming to improve the consistency and uniformity of spraying, while reducing manual intervention and improving production efficiency. It is suitable for large-scale, assembly line production operations.
High safety: Due to the absence of organic solvents in powder coatings, there are no safety hazards such as fire and explosion. During the spraying process, powder particles are adsorbed on the surface of the workpiece under static electricity, and will not float around, reducing the harm of dust to operators.
Color diversity: Powder coatings can be formulated into various colors according to different needs, and can achieve good color coverage and uniformity, meeting the personalized requirements of different users for product appearance colors.
Automotive industry: Used for surface coating of car bodies, components, engines, wheels, etc., which can improve the corrosion resistance, wear resistance, and appearance quality of cars, while meeting the requirements of the automotive industry for environmental protection and production efficiency.
Home appliance industry: Spray coating the outer shell of household appliances such as refrigerators, washing machines, air conditioners, televisions, etc., to give them good appearance decoration and weather resistance, and enhance their market competitiveness.
The electronic and electrical industry includes switchgear, instrument cabinets, computer casings, and peripheral equipment casings. Powder coating can provide good electrical insulation and protection performance, ensuring the normal operation and service life of electronic and electrical equipment.
Metal products industry: Surface treatment of various metal products, such as metal furniture, hardware tools, building metal components, mechanical parts, etc., can enhance the corrosion resistance and decorative properties of metal products, and extend their service life
Building materials industry: For example, the spraying of aluminum profiles, steel doors and windows, curtain walls, etc. can not only improve the weather resistance and decorative properties of building materials, but also meet the environmental and energy-saving requirements of the construction industry.
Equipment inspection and maintenance: Before starting up, all safety protection facilities and safety signs should be checked to ensure that voltage, air pressure, water pressure and other parameters meet the requirements. The safety grounding of the static electricity generation system should be reliable; Regularly clean, maintain and upkeep the equipment, check whether the spray gun, filter element, pipeline and other components are normal, and replace worn or damaged parts in a timely manner.
Powder quality control: Select powder coatings with qualified quality, uniform particle size, and good flowability, and avoid using powders that are damp, clumped, or expired; Recycled powder must be screened and impurities removed before being mixed with new powder in a certain proportion to ensure the performance and spraying effect of the powder.
Operating standards: Operators must wear labor protection equipment such as safety helmets, protective masks, anti-static work clothes, etc., to avoid skin and respiratory contact with powder; During the spraying process, it is necessary to maintain a stable distance and angle between the spray gun and the workpiece, control the spraying speed and the movement speed of the spray gun, and ensure that the coating is uniform and consistent; At the same time, attention should be paid to avoiding collisions between the spray gun and the workpiece to prevent damage to the spray gun and workpiece.
Ventilation and fire and explosion prevention: During the powder spraying process, a certain amount of dust will be generated, and a good ventilation system must be equipped to timely discharge the dust and prevent explosion accidents caused by excessive dust concentration; Smoking and open flame operations are prohibited in the spray booth to avoid fires or explosions caused by static sparks or other sources of fire.
Quality inspection and defect handling: After powder coating, the coating quality should be checked immediately. If defects are found, they should be dealt with in a timely manner. If the defect range is small, it can be repaired with the same color powder before curing; If the defect range is large and affects the surface quality, it is necessary to sand it with sandpaper and spray it again, or use a paint remover to remove the coating before spraying.
