喷墨印刷液滴的铺展特性研究  

Spreading Characteristics of Inkjet Printing Droplets

作　　者：武秋敏 苏昕 崔忻羽 WU Qiu-min;SU Xin;CUI Xin-yu(Faculty of Printing,Packing and Digital Media Technology,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学印刷包装与数字媒体学院,西安710048

出　　处：《包装工程》2023年第11期227-234,共8页Packaging Engineering

基　　金：陕西省教育厅重点科学研究计划项目(20JY054);陕西省自然科学基础研究计划重点项目(2022JZ–30)。

摘　　要：目的研究喷墨印刷液滴相关参数对其铺展特性的影响,为喷墨印刷质量的研究奠定基础。方法采用Fluent软件,基于VOF(Volume of Fluid)法,建立液滴撞击光滑承印物表面并铺展的仿真模型,采用PISO(Pressure-Implicit with Splitting of Operators)算法对速度和压力进行耦合,分析液滴相关参数对其撞击铺展的影响规律。结果当液滴飞行速度为6 m/s、接触角度为40°、液滴流体黏度为0.005 Pa·s、液滴直径为0.08 mm时,液滴撞击光滑承印物表面的铺展系数最大,铺展程度最好,铺展特性最优。结论铺展系数随液滴直径、流体黏度和接触角的增大而降低,随飞行速度的增大而增大。The work aims to study the effect of inkjet printing droplet related parameters on their spreading characte-ristics,so as to lay a foundation for the study of inkjet printing quality.The Fluent software was used based on the VOF(volume of fluid)method to establish and spread a simulation model of droplet impact on the surface of a smooth sub-strate,and the PISO(Pressure-Implicit with Splitting of Operators)algorithm was used to couple the speed and pressure.The effect of droplet related parameters on its impact spreading was analyzed.The results showed that when the droplet flying speed was 6 m/s,the contact angle was 40°,the droplet fluid viscosity was 0.005 Pa·s,and the droplet diameter was 0.08 mm,the droplet had the highest spreading coefficient,the best spreading degree,and the best spreading characteris-tics when impacting the smooth substrate surface.The spread coefficient decreases with the increase of droplet diameter,fluid viscosity and contact angle,and increases with the increase of flight speed.

关 键 词：喷墨印刷 铺展特性 铺展系数 

分 类 号：TS805.4[轻工技术与工程]