挤压式打印头注墨动画模拟

Computer Simulation of Viscoelastic Inks in Micro-extrusion Printhead

基于在微小细管内含有两种材料的挤压式单喷嘴三维打印头和黏弹性流体材料的分析模型,以质量守恒方程为基础,进行数值化计算.通过AutoCAD软件绘制打印头,并在Flash软件中调用和放置控制元件、编制执行语句,通过流量控制,实现了用户交互输入液体打印启动流量和开启打印挤压控制、切换挤压液体控制.动画模拟单喷嘴打印头内的挤压式注液,提供了更快、更灵活和直观显示的材料流动过程模拟,为硬件设计和液体的流变性分析讨论提供方便.

With the analytical model of viscoelastic inks in microfluidic printheads for multimaterial 3D printing, numerical compution was done based on the mass balance. The printhead＇s configuration was drawn in AutoCAD software, control elements and operation commands were called, placed and coded in Flash software to realize the animation of ink refilling in this single nozzle printhead. This program realized the interaction with users＇ input flow and switching between two inks with the animation, so as to provide a faster, more flexible and intuitive display of material flow simulation, which could be used for further discussions of hardware design and ink rheology analysis.