Effect of electrostatic rotating bell atomizer parameters on automotive paint quality and deposition efficiency

汽车涂料使用静电旋转钟（ESRB）雾化器，提供高度均匀的薄膜厚度。机器人操纵器在车身上移动油漆喷雾器，优化机器人路径可能需要几个月的时间，以最大限度地减少油漆消耗和应用时间，同时沉积具有可接受的均匀性的薄膜。确定由给定的喷涂路径产生的膜厚，并确定喷涂参数，如雾滴大小分布和速度，从而获得最佳的涂料质量，这将具有重要的商业价值。在这个合作项目中，我们建议：-将油漆质量和传递效率的变化与ESRB雾化器产生的液滴大小分布和喷雾模式联系起来。-建立液滴尺寸和喷淋模式变化与漆膜变化联系的物理机制。液滴尺寸分布将通过直接对喷雾进行成像测量，并使用图像分析软件确定液滴直径。液滴大小的变化将与油漆颜色的变化相关。将拍摄液滴撞击表面的高速视频。实验室实验将研究液滴对表面的撞击，油漆液滴的蒸发速率，并建立模型来预测漆膜厚度作为液滴质量通量的函数。

Automotive paints are applied using Electrostatic Rotating Bell (ESRB) atomizers that deliver a highly uniform film thickness. Robot manipulators move the paint atomizers over the car body and it can take months to optimize the robot path to minimize paint consumption and application time while depositing a film with acceptable uniformity. It would be of significant commercial value to identify the film thickness resulting from a given spray path and determine spray parameters such as droplet size distribution and velocity that gives the best paint quality. In this collaborative project we propose to:- Correlate changes in paint quality and transfer efficiency with droplet size distributions and the spray pattern produced by ESRB atomizers.- Establish the physical mechanism that links changes in droplet size and spray pattern to changes in the paint filmDroplet size distributions will be measured by directly imaging the spray and using image analysis software to determine droplet diameters. Changes in droplets sizes will be correlated with shifts in paint colour. High speed videos will be taken of droplet impingement on surfaces. Laboratory experiments will be done to study droplet impingement on surfaces, the rate of evaporation of paint droplets and models will be developed to predict paint film thickness as a function of the droplet mass flux.