Film coating technique is based on application of the airless spray which is 1 fluid spray.
An airless spray mechanism is used for the point of the watering machine for lawns, or the hose for firefighting.
Although those use nozzles are the spray patterns of a cone and a whirling pattern, another spraying also has an even sector spray pattern.
Respectively, many amounts of discharge flow come out, and their spraying particles are also coarse. There are some elements which improve micro atomization of an airless spray and influence atomization.
The biggest element in it is a nozzle.
In order to obtain good atomization, paint viscosity and the thixotropic nature of a coating material are also influenced.
The difference in nozzle dimensions etc. also influences atomization.
The foundations of the heiress nozzle which forms a sector pattern leave a collision of fluid which is shown in Fig. 2.
When the fluid which runs in a pipe comes out of the cage festival of the can point, a collision of fluid cuts in cage festival this side. According to pipe internal pressure, fluid is emitted with sufficient vigor from a cage festival exit. It decomposes rapidly from a liquid membrane and the jet shifts to a glob. In that case, it is easy to become は and "edge-like injection" (tail-like injection) with the nozzle of a common sector pattern. Therefore, a tail is canceled by applying high pressure. Fig. 3 expressed the process of the atomization. If the thin film liquid membrane which fully had speed flies the inside of the air in the free direction, the liquid will be disassembled from a thin thread liquid without unstable raw and a ball to particles. It calculates theoretically that a liquid finally becomes small particles.
