In the process of powder spraying, the equipment that needs to be used in the process of powder spraying is the form of combining the automatic spray gun with the injection of the spray gun. The purpose is to monitor the quality of the powder spraying in real time, and ensure the quality of the product to be stable. What should be paid attention to in the process of powder spraying are:
First, attention should be paid to the electrical conductivity of the spreader, and the Xu layer on the spreader should not be too thick. When the thickness is too thick, the coating on the appliance can be removed by centralized burning.
Two, as the workpiece is heavier, it is necessary to design the hanger and require the hanger to be solid and reliable.
Three. Use cold air to blow dry, check the workpiece in the process of blowing dry, for the allowable defect, such as flow hanging, foaming, bottom, hole, etc. can be diluted powder coating, such as acetone, etc., when the workpiece is not dried or coated on the defect surface.
Four. The treatment of major defects is required to be retreated with waste heat curing. According to the thickness of the film, different treatment methods are selected. In general, there are three methods of respraying, mechanical grinding, and stripping agent treatment.
In the end, the pre drying process should be used. The purpose is:
1, it is to remove the residual moisture on the workpiece.
2, it is possible to ensure that a certain thickness of powder coating adheres well to the surface of the workpiece.
The 3 is to ensure that the workpiece is uniformly heated as quickly as possible, so that the curing temperature is 90 to 140 degrees.
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