If you want to for zinc steel guardrail powder spraying, powder spraying, what should you pay attention to the problem, how to spray powder is the best, as a professional manufacturer of zinc steel guardrail, small make up together with you to learn how to zinc steel guardrail powder problem.
Powder spraying process, attention should be paid to sling the electrical conductivity, and on the spreader xu shoulds not be too thick, too thick can adopt the method of centralized burning when clear the coating on the appliance; Due to the workpiece is heavier, must design good hanging fixture, hanging fixture is firm and reliable.
Adopt preliminary drying purpose: one is to remove the workpiece on the remaining water, 2 it is to guarantee a certain thickness of powder coating well attached on the surface of workpiece, three is to ensure that the workpiece evenly heat as soon as possible, accelerate the curing process of general preliminary drying temperature is 80-140 ℃.
For guardrail products, according to its characteristics, the use of automatic spray gun plus the combination of manual spray gun for spray form, the purpose is to real-time monitoring of powder quality, guarantee the product quality is stable. General pure polyphenol powder coating curing condition is 200 ℃, 10 min, by adjusting the temperature of the heating furnace and the chain speed to ensure that the curing temperature and time.
Using cold wind blow dry, in the process of dry, examine artifacts, for allowing defects, such as flow, foaming, grinning, hole and usable acetone diluted powder coatings, such as the association TuCheng while artifacts not drying or spray coated the surface defects, use of waste heat curing processing for major defects need to repair, according to the different processing methods of coating thickness selection, generally have a direct on the powder spraying, mechanical grinding, deal with three methods with remover.