How to do with bubbles on the surface of the paint film after the curtain coating machine is used

When the curtain coating machine is in the process of coating, the formation of small bubbles and pinholes on the surface may be caused by the following reasons:

1, UV spray paint itself defoaming performance is poor. At this time you can choose to cancel the bubble good UV finish.

2. The first sealing paint is not fully filled with capillary pores, leaving small gaps. The air in the gaps expands and spills after being heated by hot paint, curing machine and leveling machine. So at this time must fill the back cover must be fully sealed, do not leave a small gap.

3. Small bubbles are cured in the paint film, forming small bubbles and small pitting spots; Large air bubbles are heated and burst to form pinholes or small circular pits. At this time, it is necessary to avoid painting, curing machine and leveling machine working at high temperature, resulting in too high temperature of the substrate, so that the air expansion and escape.

4, the machine buffer loading oil will rush bubbles. The new type of putty can be used to fill before the first base coat.

5, the height between the shower head and the working plane is too large. So pay attention to the shower head and the workbench to maintain a distance of about 10cm.

6. The difference between the oil outlet of the oil groove and the height of the paint bucket is too large, and the paint directly flushes bubbles. Can reduce the film head distance, reduce the tank outlet and paint bucket height difference.