采用电子称量法, 以铁红防锈漆为工质, 研究了高压无气喷涂中雾化压力、喷嘴等效孔径、喷涂距离等主要工艺参数对涂料转移率的影响规律。结果表明,高压无气喷涂的涂料转移率随喷嘴等效孔径的增大而增大, 随喷涂距离的增大而减小, 随雾化压力的增大呈现先增大后减小的变化趋势。在多参数共同影响下, 涂料转移率存在一个最优点, 喷嘴等效孔径为0.48 mm,雾化压力为12 MPa,喷涂距离为250 mm时可得到最优的涂料转移率。

The influencing laws of high-pressure airless spraying working parameters such as spray pressure, equivalent diameter of nozzle and spray distance on the transfer efficiency of paint were studied by electronic weighing method and iron red antirust paint as working fluid. Experimental results show that the transfer efficiency of paint for high-pressure airless spraying increased with the increase of the equivalent diameter of nozzle, decreased with the increase of the spray distance, and increased firstly and then decreases with the spray pressure. With the comprehensive influence of multiple parameters, the transfer efficiency of paint showed an optimal point, at which the working parameters for the equivalent diameter of nozzle was 0.48 mm, the atomizing pressure was 12 MPa and the spray distance was 250 mm. The study results can provide the reference for working parameter selection of high-pressure airless spraying.