板式部件的UV辊涂工艺研究

Study on UV Roller Coating Technology of Panel Parts

为了完善板式部件的涂饰工艺,提升不同的表面涂饰效果,解决涂饰工艺过程中的缺陷问题,本文以薄中密度纤维板(MDF)为板式部件基材,研究封闭和开放两种UV辊涂工艺在MDF中的应用,分析涂饰后MDF漆膜性能的影响因素。结果表明:封闭和开放两种辊涂工艺赋予了MDF不同的表面特征,使MDF光滑平整或具有自然的木纹;由于素板及薄木贴面后的MDF表面孔隙大小不同,影响了砂光、辊涂和干燥工艺;根据工件表面色彩的需求,UV漆中颜料的选择影响工件的干燥程度,当涂料颜色对紫外光吸收强度较大时,应提高干燥单元的固化能量,补充颜料对紫外光的损耗。涂饰工艺的每道工序均影响着板式部件涂饰后的漆膜性能,需根据板件的基材孔隙、涂料颜色和工艺类型等因素,柔性调整工艺流程及参数。

In order to improve the finishing process of panel parts,improve the different surface finishing effects,and solve the defects in the finishing process,taking regular thin MDF as the substrate of panel parts,the application of two UV roller coating technologies,closure and opening,in MDF was studied,and the influence factors on the performance of MDF coating film after finishing were analyzed.The results showed that the two roller coating processes of closure and opening gave MDF different surface characteristics,making MDF smooth and flat or with natural wood grain.Due to the different pore sizes of MDF surface after veneer overlaying and plain panel,the parameters of sanding,roller coating and drying process were affected.According to the needs of the surface color of the workpiece,the choice of pigment in the UV coating affected the drying degree of the workpiece.When the UV light absorption intensity of the coating color was large,the curing energy of the drying unit should be increased to supplement the loss of pigment to the UV light.Each working procedure of the process affected the coating film quality of the panel parts after finishing.The process flow and parameters should be flexibly adjusted according to the substrate pore,paints color and technological types.