摘要
为了提高双组分硅橡胶防热涂料(TR-37G)自动喷涂厚度均匀性,对其自动喷涂工艺进行了研究。研究了喷涂参数对该涂料自动喷涂状态和涂层厚度的影响,分析了涂层厚度均匀性影响因素,之后对自动喷涂单道理论厚度进行了推导,分析了涂层厚度影响因素,最后通过模拟件自动喷涂,验证该涂料自动喷涂厚度均匀性。结果表明:黏度、喷涂扇幅、泵压、自动调节阀气流大小、喷涂距离等参数均会影响涂料自动喷涂,对于锥柱型产品外壁喷涂,横向厚度均匀性主要受偏轴距离影响,纵向厚度均匀性主要受喷枪高度影响。自动喷涂时,涂层厚度影响因素包括涂料利用率、喷枪单位时间出料量、涂料密度、产品直径、喷枪纵向运行速度,锥柱型产品竖直状态下自动喷涂时,不同高度喷涂速度需进行修正。
The automatic spraying process of the two-component silicone rubber heat resistant coating TR-37 G was studied in order to improve the thickness uniformity. First,the spraying parameters on the coatings automatic spraying condition and the influence of coatings thickness were studied. Then,the factors affecting coatings thickness uniformity were analyzed. Next,automatic spraying thickness of a single coat was derived theoretically. The influencing factors on the coatings thickness were analyzed. Finally,the thickness uniformity of the coatings was verified by the simulation of automatic spraying. The results showed that the spraying fan width,pump pressure,automatic control valve airflow size,spraying distance and other parameters would affect the coatings automatic spraying. The transverse thickness uniformity was mainly affected by the axis deviation,and the longitudinal thickness uniformity was mainly affected by the height of the spray gun for the cone and column products respectively. The factors affected the coatings thickness during automatic spraying included coatings utilization rate,quantity of materiasls off the spray gun,coatings density,product diameter,spray gun moving speed longitudinaly. When the cone or column product was sprayed vertically,spraying gun moving speed at different height needed to be corrected.
作者
范海波
韩志昌
赵立波
赵璐露
高超
王奥
卢鹉
Fan Haibo;Han Zhichang;Zhao Libo;Zhao lulu;Gao Chao;Wang ao;Lu Wu(Aerospace Research Institute of Materials&Technology,Beijing 100076,china)
出处
《涂料工业》
CAS
CSCD
北大核心
2020年第1期57-62,68,共7页
Paint & Coatings Industry
基金
航天科技集团重大工艺改进课题“弹体结构功能涂层自动化涂装单元技术研究”（课题号900703701301010115078001）
关键词
自动喷涂
防热涂料
低密度硅橡胶
厚度均匀性
automatic spraying
heat-resistant coatings
low density silicone rubber
thickness uniformity
