供墨系统中墨水粘度及负压控制系统设计

摘要

供墨系统中墨水粘度随温度降低而提高,造成墨水流动性差,易导致喷头堵塞故障和成像模糊；喷头负压不足则会造成漏墨,而负压过大又阻碍墨滴喷射.为解决上述问题,开展了墨水粘度分析,建立了墨水粘温之间关系,提出了对墨水控温以保证其粘度的方法,并结合XJ500喷头的工作需求,提出了通过墨盒内液位控制负压供给的方法.进行了温度、液位控制系统设计,在供墨系统中进行了试验.试验结果表明,该方法起到了较好的粘度、负压控制效果.%In order to solve the problems of nozzle block and low image quality caused by viscosity decrease and ink-jet obstructed by unappropriate negative pressure,the viscosity and negative pressure control system was investigated. After the analysis of the relationship between viscosity and temperature, and the relationship between negative pressure and ink level, a system was presented to control viscosity and negative pressure by ink level and temperature separately. The system were tested on XJ50O ink supply system. The experimental results show that the viscosity of ink and negative pressure are well controlled.