| 摘要 |
PURPOSE:To achieve the miniaturization of the title system and high speed continuous operation and to form a coating film having good quality, in a defoaming treatment apparatus, by allowing paint to be treated to flow down in a curtain form to increase the surface area and reducing its pressure to apply defoaming treatment to the paint in a membrane state. CONSTITUTION:A defoaming treatment apparatus 4 is evacuated to be reduced to desired atmospheric pressure and, after the opening degrees of valves 20a, 20c are appropriately set, a pressure feed pump 20b is operated to introduce the new paint in a paint tank 2 into an upper chamber 14 from piping 20. This paint to be treated passes through a slit-like through-hole plate on the way to fall in a lower chamber 16 and, at this time, the paint becomes the membrane form corresponding to the arrangement pattern of slits and the surface area of the paint is sufficiently enlarged to fall in the lower chamber 16 while the tinning of the paint is promoted. Therefore, the air bubbles in the paint to be treated are rapidly and easily broken under reduced pressure to discharge air and the defoamed paint is accumulated in the lower part of a container before supply to the flow coater head 16 of a painting apparatus.
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