胶版印刷机橡皮布蠕变行为及其对印刷的影响  

The creep behavior of offset blanket and its effect on printing

作　　者：刘澎[1,2] 赵宁[1] 张海燕[2] 

机构地区：[1]西北工业大学机电学院,陕西西安710072 [2]西安理工大学印刷包装工程学院,陕西西安710048

出　　处：《西安理工大学学报》2014年第4期431-436,共6页Journal of Xi'an University of Technology

基　　金：国家自然科学基金面上基金资助项目(51275406);陕西省教育厅科学研究计划基金资助项目(14JK1528)

摘　　要：在胶版印刷中,由于胶印橡皮布这种粘弹性材料参与接触过程,相关研究内容属于复杂接触力学问题,关于胶印机油墨精确传递机理的研究尚未取得突破。本文理论推导了胶印橡皮布的蠕变行为表达式,并用纳米压痕仪实验测试了橡皮布的压力-位移曲线,用推导得到的蠕变行为表达式拟合实验得到数据,从而确定了实验胶印橡皮布的蠕变函数。将该蠕变函数引入基于弹流润滑理论的胶印机油墨传递接触模型中,采用数值计算的方法研究了印刷橡皮布的粘弹性蠕变行为对胶印机油墨传递机理的影响。研究发现,在胶印机油墨传递精确机理的研究中,橡皮布的粘弹性蠕变行为不可忽视。In offset printing, the research on precise ink transfer rule has not achieved a break- through because the contact in offset press belongs to a complex viscoelastic contact involving the offset blanket. This paper deduces the creep behavior formula of offset blanket, and Nanoindent- ation experiment is carried out to test the offset blanket pressure-displacement curve. The cr~ behavior formula obtained from deduction is used to fit the data obtained from experimm whereby determing the creep function of experiment offset blanket. And the creep function is troduced into the contact model of offset printing based on elastic hydrodynamic lubrication th, ry. Then the effect of viscoelastic creep behavior of rubber blanket on ink transfer rule is inve, gated by the method of numerical calculation. The studies find that the viscoelastic creep behav of rubber blanket can not be ignored in order to get the precise ink transfer rule of offset pres.

关 键 词：胶版印刷机 印刷橡皮布 粘弹性 蠕变 数值计算 

分 类 号：TS825[轻工技术与工程]