APPLICATION OF THE MECHANICS OF FLUID-FILLED POROELASTIC SOLIDS TO MIMEOGRAPH TECHNOLOGY

在数学和数值分析之前，我们测量了各种机器零件的尺寸和筛网、印刷母版和油墨的材料性能，观察了印刷的内部状态，并建立了油墨在筛网和印刷母版中的流动模型。在此基础上，结合流体饱和多孔弹性固体的力学特性，分析了以充液多孔弹性单层为模型的油墨在丝网和印刷母板中的流动。假定所述层由压辊从下按压，并从上承受在印刷滚筒和墨辊之间产生的流体动力润滑压力。该层的变形和伴随的油墨流动被证明是由这里新定义的四个无维参数控制的。数值结果显示了一些重要的结果；例如，在各种可能的油墨传递机制中，压辊压实层将油墨从层中挤出的机制起着重要作用，特别是在压缩时间与层的特征时间相比较小的情况下。

Before mathematical and numerical analysis, we measured various machine parts' dimensions and material properties of screens, printing master and ink, observed in-citu states of printing, and made a model of ink flow through the screens and master. Based on these results and the mechanics of fluid-saturated porous elastic solids, we analyzed the ink flow through the screens and a printing master which are modeled by a fluid-filled poroelastic single layr. The layr is assumed to be pressed by a press roller from below and to be subjected from above to the hydrodynamic lubrication pressure induced between a printing drum and an ink roller. The deformation of the layr and the accompanying ink flow were shown to be governed by the only four nondimensional parameters newly defined here. The numerical results showed some important results ; e.g.squeezing-out of the ink from the layr by the layr compaction by the press roller plays an important role among various possible ink transfer mechanisms, especially for the case where the compression duration is small in comparison with the charcteristic time of the layr.