胶印机输墨系统结构建模与色墨控制模型  

Structure Modeling of Ink Transferring System and Ink-to-Color Control Model of Offset Printing Machine

作　　者：初红艳[1] 康建山[1] 陈振欢[1] 蔡力钢[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100124

出　　处：《北京工业大学学报》2013年第6期817-822,共6页Journal of Beijing University of Technology

基　　金：北京市自然科学基金资助项目(3113025);北京市教委科研计划项目(KM200910005006)

摘　　要：实地密度是反映印刷品色彩质量的主要因素,取决于印刷品上的墨层厚度,而胶印机输墨系统结构及墨键开度又决定了印刷品上的墨层厚度.通过建立输墨系统中各墨辊模型,建立胶印机输墨系统结构模型.基于各墨辊接触点的最小下墨路径和油墨传递路线,建立墨层厚度方程组,通过对方程组的求解,并根据承印物墨层厚度与最后一根着墨辊接触点墨层厚度的关系,得到承印物墨层厚度与墨斗辊墨层厚度的关系,即油墨传递率.通过实验获得不同工艺条件下承印物上的墨层厚度与实地密度的关系,并通过对墨键开度与墨键开口大小、墨斗辊墨层厚度关系的标定,即可得到不同工艺条件下墨键开度与实地密度的关系,即色墨控制模型.该模型可用于色彩质量控制,即当色彩质量出现偏差时,基于该模型进行墨键开度的调整进而实现色彩质量的控制.Solid density is the main factor that represents the color quality of presswork, and it is determined by the ink thickness on the presswork. The thickness of the presswork is determined by the structure of the ink transferring system and the value of the ink key. Structure model of the ink transferring system of offset printing machine is established after the model of all the ink rollers in the structure is established. Then, the ink thickness equation is established based on the shortest ink transferring path of each ink roller contact point and ink transferring route of the system. By solving the equation, and according to the relationship between the ink thickness on the presswork and the ink thickness on the last ink roller, the relationship between the ink thickness on the presswork and the ink thickness on the ink fountain roller is obtained, i. e., the ink transferring ratio. The relationship between the solid density and ink thickness under different conditions can be obtained by experiments. Through the calibration of the ratio of ink key value and the ink key opening size, the ink thickness on the ink fountain roller, the relationship between the ink key value and the solid density under different conditions can be obtained, i.e., the ink-to-color control model. The model can be used in the color quality control. When the color quality shows the error, the ink key value can be adjusted to control the color based on the model.

关 键 词：胶印机 输墨系统 油墨传递路线 色墨控制模型 

分 类 号：TS805.3[轻工技术与工程]