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Rotation speed and paint flow rate of spraying robot rotating cup

2021-04-10(84)Views

For robot coating construction, the thickness of the coating film is the most important quality control factor in the coating process.

For robot coating construction, the thickness of the coating film is the most important quality control factor in the coating process. The atomized particle fineness is the main factor that affects the spray thickness of the spraying robot, and the atomized particle fineness is mainly affected by the rotating cup speed of the spraying robot and the coating flow rate of the spraying robot. Songle Robot here to share the rotating cup speed and paint flow rate of the spraying robot.




Video of spraying robot work


1. Rotating cup speed of spraying robot

The rotation speed of the spraying robot is an important element of the atomization precision of the high-speed rotating cup. When other process parameters remain unchanged, the rotating cup speed is larger and the coating diameter is smaller. At a slightly lower speed, the influence of the speed on the atomization fineness is significantly greater than in the high-speed range.


The rotation speed of the spray robot will affect the film thickness. When the speed is too low, it will cause rough coating; spraying robots and fine atomization will cause paint mist loss (caused by spray), which will shake the film thickness; at the same time, when ultra-fine spraying, the spraying room is very sensitive to air. In addition to the excessive rotation speed of the rotating cup, it will cause excessive wear of the turbine bearings, increase the consumption of compressed air and reduce the amount of solvent contained in the coating. The optimal rotation speed of the coating robot can be confirmed by the flow rate characteristics of the coating used. Therefore, the rotation speed of high-viscosity two-component coatings is higher than that of conventional solvent-based coatings used for water-based coatings with surface tension.


Second, the paint flow rate of the spraying robot

The paint flow rate of the spraying robot is the amount of paint lost to each rotary cup per unit time, also known as the spraying flow and the amount of paint (rate).


In addition to the rotating cup speed, the paint flow rate is the second factor that affects the fineness of atomized particles. When other parameters remain unchanged, the lower the flow rate of the paint, the finer the atomized particles, but at the same time it will also lead to an increase in solvent volatilization in the paint mist.


The high paint flow rate of the spraying robot will form a corrugated coating film. At the same time, when the paint flow is too high and the spin cup is overloaded, the coating film on the edge of the spin cup will thicken to a certain level, causing the grooves on the spin cup to prevent the paint from diverting. It also presents a layered patent leather, which will produce undesirable phenomena such as bubbles or uneven paint drop sizes.


3. The large paint flow rate of the spraying robot spray gun is related to the diameter of the rotating cup and the density of the coating.


The upper limit is determined by the fineness of atomization and the effect of electrostatic coating. Theoretical experience indicates that the coating should be input at a constant speed, and shaking in a small range will not affect the quality of the coating. In the actual spraying process, the spraying area of each rotating cup is different, and the coating activity is different. In addition, the coating flow rate of the rotating cup is also changed due to changes in the coating.

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