Matters needing attention when spraying zinc steel fence

If you want to spray zinc steel fence, what problems should be paid attention to when spraying powder, and how to spray powder is the best. As a professional zinc steel fence manufacturer, I will learn how to apply zinc steel fence together. The dusting problem.

In the process of powder spraying, pay attention to the conductivity of the spreader, and the layer on the spreader should not be too thick. If it is too thick, the coating on the appliance can be removed by centralized incineration; because the workpiece is heavier, it must be designed well. The hanger is required to be firm and reliable.

The purpose of pre-baking is to remove the remaining moisture on the workpiece, the second is to ensure that a certain thickness of powder coating is better attached to the surface of the workpiece, and the third is to ensure that the workpiece is heated evenly as soon as possible to speed up the curing process. The general pre-baking temperature is 80-140℃.

For fencing products, according to its characteristics, the combination of automatic spray gun and manual spray gun supplementary spraying is adopted, and the purpose is to monitor the spraying quality in real time and ensure stable product quality. Generally, the curing condition of pure polyphenol powder coating is 200℃, 10min, and the curing temperature and time are guaranteed by adjusting the temperature and chain speed of the heating furnace.

Use cold air to dry. In the process of drying, inspect the workpiece. For allowable defects, such as sagging, foaming, bottoming, and venting, the powder coating can be diluted with acetone, etc., and the workpiece is painted or sprayed while the workpiece is not dry. On the surface of the defect, use waste heat to cure the major defects. The major defects need to be repaired. Different treatment methods are selected according to the thickness of the coating film. Generally, there are three methods of direct loading, re-spraying, mechanical polishing, and treatment with a release agent.