Powder coating is the use of professional spraying equipment, such as common on the electrostatic spraying machine, the powder coating to the surface of the workpiece is an operational process, because they use advanced technology, so it can make the instruments or accessories surface paint spraying uniformity, to achieve because the ordinary traditional process can not guarantee the advantages and characteristics, in addition to. We can also learn and ordinary painting process is not the same, powder coating effect is more good, such as good corrosion resistance and aging resistance process and strong adhesion make them on the one hand has a lower cost, on the other hand, can also guarantee satisfactory results.
A, spray powder price
1, price:?27.00/bag
Spray powder?304/316 stainless steel powder? Electrostatic spraying? Low oxygen content? Factory direct spray powder
Manufacturer: Shandong Leader New Material Technology Co.
2, Price: ?17.00/kg
Meijia brand Meijia sprayable putty powder
Manufacturer: Meijia Building Materials (Beijing) Co.
3, Price: ?19.00/box
Conductive Paint Patent Formula Anti-electromagnetic wave interference conductive paint conductive powder shenzhen factory spray processing
Manufacturer: Shenzhen Shatech Technology Co.
The above price is for reference only
Two, spraying powder composition
Spraying powder is mainly acrylic powder, polyester powder and so on.
Plastic spraying is also often referred to as electrostatic powder coating, it is the use of electrostatic generators to make plastic powder charged, adsorbed on the surface of the iron plate, and then after 180 ~ 220 ℃ baking, so that the powder melts and adheres to the surface of the metal, plastic spraying products are mostly used for indoor use of the box, the paint film shows a flat or matte effect.
Three, spraying powder is harmful to the human body
Harmful to the human body, working in such an environment, long-term inhalation of powder, the formation of pneumoconiosis, there will be a health problem for example, spraying the zinc Na involved with the coating of the human body's metabolism of the brain cells have a great deal of harm.
Guidance:
Work should wear a gas mask, pay attention to the use of ventilation facilities and open windows to ventilate, so that harmful substances are discharged in a timely manner, not in the indoor accumulation. Reduce the stay time in the workshop.
Four, spraying powder working principle
Working electrostatic spraying gun or spray disk, spray cup, paint particles partially connected to the negative pole, the workpiece is connected to the positive pole and grounded in the high-voltage power supply under the action of high voltage, the end of the spray gun (or spray disk, spray cup) and the formation of a static field between the workpiece. Paint particles by the electric field force and the electrostatic field voltage and the amount of charged paint particles is proportional to the distance between the gun and the workpiece is inversely proportional to when the voltage is high enough, the end of the gun near the region to form an air ionization zone, the air is intensely ionized and heated, so that the end of the gun around the sharp edge of the sharp edge or the pole needles to form a dark red halo ring, in the darkness can be clearly seen, which is when the air produces a strong corona discharge.
The film-forming materials in the paint, namely resin and pigments, most of which are composed of polymer organic compounds, more than a conductive dielectric, solvent-based coatings in addition to film-forming materials, organic solvents, co-solvents, curing agents, electrostatic diluents, and other types of additives and other substances. These solvent substances in addition to benzene, xylene, solvent gasoline, etc., most of the polar substances, low resistivity, have a certain conductive ability, they can improve the coating of the charged properties.
The molecular structure of the dielectric can be divided into polar molecules and non-polar molecules of two kinds. Polar molecules composed of dielectric in the role of the applied electric field, showing the electrical; non-polar molecules composed of dielectric in the good.
The paint is atomized by the nozzle and then sprayed, the atomized paint particles through the muzzle of the pole needle or spray disk, spray cup edge due to contact and charged, when passing through the gas ionization zone generated by the corona discharge, will once again increase its surface charge density. These negatively charged paint particles of the electrostatic field, to the conductive polarity of the workpiece surface movement, and was deposited on the surface of the workpiece to form a uniform coating film.
The powder coating described above is a new type of processing production process, mainly used in the manufacturing process of some mechanical equipment. Because they use powder, through the professional powder spraying equipment for work, so on the one hand can make up for the traditional painting process spraying uneven or high cost defects, on the other hand can also make the powder on the surface of the instrument has a strong adhesion ability and corrosion resistance, after a long period of time will not occur after the use of serious damage. This makes the beauty of tools and instruments will not be greatly reduced, but also to help consumers achieve satisfactory results.
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