Powder equipment processing line manufacturers introduce powder spraying construction technology and requirements for you

What are the precautions in the construction of powder spraying equipment? Powder equipment processing line manufacturers to introduce you:

The so-called powder electrostatic spraying is the use of high voltage electrostatic corona electric field principle. The high voltage negative electrode is connected to the metal guide mark of the spray gun head, and the sprayed workpiece is grounded to form a positive electrode, so that a strong electrostatic electric field is formed between the spray gun and the workpiece. When the compressed air, as a carrier gas, sends the powder coating from the powder supply barrel to the nozzle guide rod through the powder tube, due to the corona discharge generated by the guide rod connected to the high voltage negative electrode, a dense negative charge is generated near it, so that the powder is negatively charged, and enters the electrostatic field with high electric field strength, under the dual action of electrostatic force and the carrier gas. The powder uniformly flies to the surface of the grounded workpiece to form a uniform powder layer, which is reheated and solidified into a durable film.

Powder equipment spraying construction process: pre-treatment - drying to remove water - spraying - checking - baking - checking - finished product

General powder spraying construction requirements:

In order to give full play to the characteristics of powder coating and extend the service life of the coating film. When spraying, the coated material must be completely grounded to increase the spraying efficiency of powder coating. Check immediately after spraying powder, if found defects should be treated in time, if the shortcomings are found after curing, the scope is small and only local and not affected, the surface decoration of the coated material can be repaired after diluting with the same color powder and acetone, if the scope is large and affects the surface quality, then sand it, spray it again or remove the coating with paint remover, and then re-sutton. The recovered powder must be screened to remove debris and mixed with the new powder in a certain proportion.

Art powder spraying construction requirements:

The fine art powder has the characteristics of beautiful appearance, strong three-dimensional sense and good decorative effect, but the construction technology is strict.

When spraying powder, the input air pressure should not be too large, generally controlled at 0.5-1.5kg /cm2. Too much air pressure will cause poor pattern clarity or produce some pitting. Electrostatic voltage should not be too high, generally controlled at about 60-70Kv. If the voltage is too high, the powder attached to the surface of the workpiece will rebound and pit. Poor leveling and other defects.

Spray powder should pay attention to ensure the thickness of the film, generally controlled between 70-100μm can be conducive to the formation of obvious patterns and larger patterns, thin film is not obvious pattern, and the pattern is small, and there will be shortcomings such as pitting.

Curing should be baked according to the specified temperature and time. If the temperature is too low and the time is too short, the powder will not form a pattern, and the mechanical properties will be greatly reduced due to incomplete curing. In addition, due to the particularity of the production process of fine art pattern powder, after spraying with recycled powder, its pattern will become smaller or not obvious changes, so it is generally recommended that the recycled powder of fine art powder should not be used. It must also be tested.

From the above point of view, although the construction requirements are stricter, I believe that as long as the above factors are well grasped in the painting process, the ideal satisfactory effect will be achieved.