包装印刷设备的烘干风嘴分布参数规律研究

目的为了提升包装印刷设备烘干性能,针对风嘴分布进行研究。方法依据实际包装印刷设备风嘴为参考,建立风嘴分布模型并进行非结构网格划分,根据实际情况建立适用于其工况的边界条件和控制方程;控制风嘴间距和承印物距离这2个关键参数,建立风嘴分布参数与热风场性能之间的数学模型;依据所建立数学模型估算不同参数模型的烘干效果。结果根据多组仿真实验得到了风嘴间距和承印物距离等参数对热风场分布的影响,相应经验公式为v (=-0.007×L+2.568)x~(4.311/L+0.056)。风嘴间距对于烘干风嘴影响效果明显,增加风嘴间距离可以提升烘干风嘴风速和热风场的均匀性;同时发现随着承印物不断前进和风嘴作用效果的叠加,其表面风速将持续呈现上升。结论经过研究分析,掌握了不同参数下的热风场分布规律,这对指导实际生产对于烘干风嘴设计具有重要参考价值。

Rule for the Distribution Parameters of Air Nozzles in Packaging Printing Equipment

The work aims to study the distribution of air nozzles, in order to improve the drying performance of packaging printing equipment. The distribution model of air nozzles was established and the unstructured meshing was conducted with reference to the air nozzle of actual packaging printing equipment. The boundary conditions and governing equations suitable for the air nozzle were chosen based on the actual situation. The spacing between the air nozzles and the distance between the substrates were taken as the main parameters and controlled, and a mathematical model was established to describe the relationship between the air nozzle parameters and the performance of hot air fields. The drying effect of different parameter models was estimated based on the mathematical model established. The influence of such parameters as the spacing between the air nozzles and the distance between the substrates on the distribution of hot air field was obtained according to multiple simulation experiments. The corresponding empirical formula was described as . The spacing between the air nozzles had a remarkable influence on the air nozzle drying. The increased spacing between the air nozzles could improve the speed to dry the air nozzles and the uniformity of hot air field. Meanwhile, the speed of air on the substrate increased when the substrate continued moving forward and under the action of the air nozzles. Through research and analysis, the distribution law of hot air field under different parameters has been mastered, which provides important reference value for guiding the design of air nozzle drying in the actual production.