The Simulation of Electrostatic Spray Painting Process with High-Speed Rotary Bell Atomizers. Part II: External Charging

2006 ◽  
Vol 23 (5) ◽  
pp. 408-416 ◽  
Author(s):  
Joachim Domnick ◽  
Andreas Scheibe ◽  
Qiaoyan Ye
Keyword(s):  
High Speed ◽  
Spray Painting ◽  
Painting Process ◽  
Electrostatic Spray

Spraying Pattern Overlap and Movement Design of Automatic Electrostatic Top Spraying Machine

2013 ◽  
Vol 365-366 ◽  
pp. 37-41
Author(s):  
Hong Zhi Han ◽  
Yan Song An ◽  
Da Wei Zhang ◽  
Wei Zhu
Keyword(s):  
Mathematical Model ◽  
Trajectory Planning ◽  
Theoretical Basis ◽  
High Speed ◽  
Automatic Machine ◽  
Working Principle ◽  
Automotive Coating ◽  
Electrostatic Spray ◽  
Coating Line ◽  
Simplified Mathematical Model

The high-speed spinning bell electrostatic automatic machine is the key equipment of the automotive coating line. A simplified mathematical model of the process of spraying aggradation was proposed by analyzing the working principle of electrostatic spray. Furthermore, the relationships among spraying distance, spraying speed and number of spraying pattern overlap were investigated and revealed. And the expressions for the velocities of both side spraying machine and top spraying machine are derived. This work provides an important theoretical basis for the spraying trajectory planning .

Fast computer simulation of open-air electrostatic spray painting

1990 ◽  
Vol 25 (3) ◽  
pp. 265-275 ◽  
Author(s):  
G.M.H. Meesters ◽  
C.A.P. Zevenhoven ◽  
J.F.J. Brons ◽  
P.J.T. Verheijen
Keyword(s):  
Computer Simulation ◽  
Spray Painting ◽  
Fast Computer ◽  
Electrostatic Spray

Measuring Paint Droplet Size, Velocity, and Charge-to-Mass Ratio Distribution for Electrostatic Rotary Bell Spray Simulation

2011 ◽  
Author(s):  
Hua-Tzu Fan ◽  
Harry Kuo ◽  
Joseph Simmer
Keyword(s):  
Droplet Size ◽  
High Speed ◽  
Transfer Efficiency ◽  
Mass Ratio ◽  
Mathematical Methods ◽  
Ratio Distribution ◽  
Input Information ◽  
Data Files ◽  
Paint Films ◽  
Electrostatic Spray

High-speed electrostatic rotary bells are widely used in the automotive industry as they provide high quality paint films with better transfer efficiency compared to air-atomizing guns. However, due to its highly turbulent spray pattern, transfer efficiency is still not ideal, i.e. some portion of paint will not reach intended target surfaces and becomes overspray. Numerical simulation of the electrostatic spraying process provides a tool to model this process as well as a way to optimize transfer efficiency. Currently, the state-of-the-art simulation model can simulate the flying trajectories of paint droplets from the edge of the rotating bell cup to the target surfaces. It requires some input information to start the simulation. The input information includes paint droplet size, velocity, and charge-to-mass ratio. Due to its large number of droplets, distributions based on droplet diameters are used to represent the entire droplet population. This paper describes experimental and mathematical methods to measure and calculate paint droplet size, velocity, and charge-to-mass ratio distributions. The resulting information can then be organized and used as the input data files for Electrostatic spray painting simulation.

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