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1, UV spray paint itself poor defoaming performance. At this time, you can choose to cancel the good foaming UV finish.
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2, the first sealing paint is not enough to fill the capillary holes, leaving small gaps, and the air in the gaps expands and escapes after being heated by the hot paint, curing machine and leveling machine. So at this time be sure to fill the back cover must be fully sealed, do not leave small gaps.
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3, small bubbles are encapsulated in the paint film to be cured, forming small bubbles, small pitting; Large bubbles are heated and burst to form pinholes or small circular pits. At this time, it is necessary to avoid the paint, curing machine and leveling machine working at high temperature, resulting in the substrate temperature is too high, so that the air expansion and escape.
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4, the curtain machine oil groove buffer device is not enough, the paint flow rate is too fast will rush bubbles. This can be filled with a new type of scraping putty before the first primer.
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5, the height between the curtain head and the working plane is too large. Therefore, pay attention to the distance between the curtain head and the workbench of about 10cm.
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6. The height difference between the oil outlet of the oil tank and the paint bucket is too large, and the paint directly blows up bubbles. It can reduce the distance between the film head and the work, and reduce the outlet of the oil tank and the paint bucket