摘要
针对银墨水/树脂双材料微滴喷射一体化成形精度调控需求,建立基于气液两相流耦合的VOF流体体积函数模型以及微滴沉积模型,研究材料黏度、表面张力以及喷射速度等参数对微滴成形效果的影响,并进行了微滴喷射对比实验。结果表明,黏度影响微滴成形距离及微滴体积,黏度增大会增加成形时间,并增大微滴体积;表面张力影响微滴断裂距离及底板铺展面积,表面张力越大则成形距离越短,在底板上的铺展面积越小;喷射速度影响微滴成形距离及成形形态,其中断裂距离和卫星滴数量与喷射速度成近线性关系。实验结果证明,当喷嘴直径为60μm时,树脂材料在3.58 m/s的喷射速度下可以产生直径为70μm的微滴,验证了微滴喷射仿真结果的有效性。
Aiming at the precision control of silver ink/resin integrated forming,the VOF fluid volume function model and the droplet deposition model based on gas-liquid two-phase flow coupling were established.The effects of the parameters on droplet forming,such as material viscosity,surface tension and injection speed,were studied and compared with the experiment.The results show that the viscosity affects the droplet forming distance and droplet volume,and the increasing viscosity would increase the forming time and droplet volume.And the greater the surface tension,the shorter the forming distance and the smaller the spreading area on the bottom plate.Moreover,the jetting velocity affects the droplet forming distance and shape,and the jetting velocity shows nearly linear relationship with the number of satellite droplets and the fracture distance.The experiment results also show that droplets with a diameter of 70μm can be obtained at the injection speed of 3.58 m/s and the nozzle diameter of 60μm,which is consistent with the simulation results.
作者
迟百宏
洪元
吴逸民
刘大勇
CHI Baihong;HONG Yuan;WU Yimin;LIU Dayong(Beijing Institute of Satellite Information Engineering,Beijing 100095,China)
出处
《电子元件与材料》
CAS
CSCD
北大核心
2022年第1期47-52,共6页
Electronic Components And Materials
基金
国家自然科学基金(51803010)。
关键词
双材料
微滴喷射
黏度
表面张力
喷射速度
double materials
micro-droplets jetting
viscosity
surface tension
injection speed
