平板电极电场驱动多喷头喷射高效微3D打印方法和规律研究  

Method and Laws of High-efficient Micro-scale 3D Printing with Multi-nozzle Driven by Electric Field of Flat Plate Electrodes

作　　者：侯佳奇 张广明 于志浩 李印 马令轩 韩志峰 石凯 郭辰旭 兰红波[1] HOU Jiaqi;ZHANG Guangming;YU Zhihao;LI Yin;MA Lingxuan;HAN Zhifeng;SHI Kai;GUO Chenxu;LAN Hongbo(Shandong Engineering Research Center for Additive Manufacturing,Qingdao University of Technology,Qingdao 266520)

机构地区：[1]青岛理工大学山东省增材制造工程技术研究中心,青岛266520

出　　处：《机械工程学报》2024年第17期310-320,共11页Journal of Mechanical Engineering

基　　金：国家自然科学基金(52175331,52275345);山东省高等学校青创科技支持计划(2021KJ044);自然科学基金重大基础研究(ZR2020ZD04)资助项目。

摘　　要：电流体动力喷射打印较低的效率已成为制约其从实验室走向广泛工业化应用的主要技术瓶颈之一,针对这一挑战性难题,提出一种平板电极电场驱动多喷头喷射高效微3D打印新工艺,论述了平板电极电场驱动多喷头喷射高效微3D打印的基本原理。搭建一种阵列化喷头制造装置,实现高精度阵列化喷头的快速制造;利用COMSOL仿真软件,分析了阵列化喷头的电场分布以及喷嘴间的高度差、内径差等对电场强度的影响;通过实验,揭示了主要工艺参数(施加电压、气压、打印速度)对于打印精度(线宽)和一致性的影响规律;最后,基于提出新方法并结合优化的工艺参数,分别使用单/双/三喷嘴喷头制造了面积80 mm×80 mm,周期500μm,线宽20μm的透明电极,分别耗时86.1 min、45.2 min、29.1 min,并对其光电性能进行测量和表征,网栅透光率(波长550 nm)分别为91.14%、91.07%、90.43%,相应的方阻分别为4.07Ω/sp、3.85Ω/sp、3.47Ω/sp,在不牺牲光电性能的前提下,大幅提高了生产效率。研究结果显示,提出的平板电极电场驱动多喷头喷射微3D打印为大面积微结构高效低成本制造提供了一种具有工业应用前景的全新解决方案。The low efficiency for electrohydrodynamic jet printing has become one of the major bottlenecks which hinders widespread industrial applications of the technique.To address the challenging issue,a novel micro-scale 3D printing with multi-nozzle driven by electric field of flat plate electrodes is proposed.The basic principle of the high-efficient micro-scale 3D printing is described.An device is developed for cost-effective manufacturing these arrayed nozzles.The effects and laws of the electric field distribution of the arrayed printhead,the height difference and inner diameter difference between the nozzles on the electric field strength are discussed by numerical simulation.The effects and laws of the printing parameters(applied voltage,air pressure,printing speed)on the printing accuracy(line width)and consistency is revealed by a series of experimental studies.Finally,combining the proposed new method and optimized process parameters,three transparent electrodes with area of 80 mm×80 mm,and line width/line spacing period 20μm/500μm are fabricated using single-nozzle nozzle,double-nozzle nozzle and triple-nozzle nozzle,the corresponding printing times are 86.1 min,45.2 min and 29.1 min,respectively.The experimental results shows that the printing effectiveness can be great improved,As a result,the proposed micro-scale 3D printing with multi-nozzle driven by electric field of flat plate electrodes provides a new solution with industrial application prospect for cost-effective manufacturing the large-area microstructures.

关 键 词：平板电极 电场驱动 微3D打印 多喷头 一致性 

分 类 号：TG156[金属学及工艺—热处理]