中密度纤维板表面喷涂工艺性研究

Surface coating technology for medium density fiberboard

为探究喷涂过程中喷头的状态和运行参数对涂层厚度性能的影响,自制了自动喷漆试验装置(喷漆枪型号:WA-101-082P),采用聚氨酯(PU)木器漆,通过调节喷头与工件之间的喷涂距离、喷头喷射方向与工件表面的角度及喷头相对工件的运行速度(3因素3水平正交试验)对36块尺寸大小为800 mm×200 mm×15 mm中密度纤维板(MDF)试件表面进行试验喷涂工艺处理,对漆膜厚度、漆膜表面粗糙度和性能进行了分析。得出以下结论 :当空气压力为0.28 MPa时,在喷涂距离为250 mm,喷头角度为30°,运行速度为55 mm·s-1条件下,可得到漆膜厚度较薄、均匀性较好且具备较好性能的涂层。

To determine the state of spray nozzle and operational parameters for optimization of coating thickness,a homemade automatic spray paint test device（type of spray gun：WA-101-082P） was used,using polyurethane（PU） wood coatings,with the spraying distance between nozzle and workpiece altered.Also,the nozzle jet direction and angle to the surface of the workpiece were varied along with nozzle operation relative to workpiece speed（Orthogonal experiment L9（3^4））to 36 block size is 800 mm×200 mm×15 mm medium density fiberboard（MDF） test specimen surface spraying process.Then,the surface coating film was measured for film thickness,film surface roughness and performance comparison and a comparative analysis was conducted.Results showed that when the air pressure was 0.28 MPa,the spraying distance was 250 mm,the nozzle angle was 30°,and the running speed was 55 mm·s^-1 were optimal conditions for obtaining a thin film thickness and favorable uniformity.With these performance characteristics the coating would perform well.