A Switch Flow Controlled Droplet Ejection Device Based on Magnetostrictive Actuator

Abstract

The invention discloses a magnetostrictive actuator based switch flow control type microdroplet injection device. The device comprises a control system, a spraying cavity with a spraying opening, a nozzle, a liquid storage tank and a compressed air supply module, wherein the nozzle is connected with the spraying opening of the spraying cavity, the liquid storage tank is connected with the spraying cavity, the compressed air supply module is connected with the spraying cavity and the liquid storage tank, a push rod is arranged inside the spraying cavity, one end of the push rod is matched with the spraying opening of the spraying cavity, and the other end of the push rod is provided with the magnetostrictive actuator which drives the push rod to move axially. According to the device, compressed air provided by the compressed air supply module serves as a power source for liquid spraying and liquid feeding of the spraying cavity, liquid drop spraying is conducted through squeezing of liquids by the compressed air, the spraying force is large, a liquid material of the high viscosity can be sprayed on the condition of the same inner diameter of nozzles, the range of applicable materials is wide, and the nozzle is not blocked easily. In a high-temperature environment, the device can work continuously for a long time and is applicable to spraying of liquids of the high viscosity, high in drop spraying frequency, high in volume controllability and good in consistency.

Description

technical field [0001] The invention relates to the field of droplet spraying equipment for liquids, in particular to a switch flow control type droplet spraying device based on a magnetostrictive actuator. Background technique [0002] With the development of society and the concept of sustainable development, some new processing technologies are constantly emerging, and droplet jetting technology is one of the popular processing technologies. Nowadays, the on-demand injection mode in droplet jetting technology is more commonly used. On-demand droplet jetting can be divided into many kinds according to its working principle. The more mature technologies include piezoelectric droplet jetting technology, air pressure direct drive droplet jetting technology and Thermal bubble droplet jetting technology. [0003] Piezoelectric droplet ejection technology, such as piezoelectric inkjet printing technology, is the most widely used. Although it has a strong ability to control liqu...

AI Technical Summary

Problems solved by technology

However, during the spraying process, the spray chamber is filled with solution at the beginning. As the process continues, the liquid volume in the spray chamber gradually decreases, and the gas volume in the spray chamber continues to increase. Under the same action time and pressure , the volume of the ejected droplets will gradually decrease, making it difficult to control the volume accuracy and consistency of the ejected droplets

Secondly, the capacity of sprayed droplets is determined by the size of the spray chamber, which is usually relatively small and cannot work continuously for a long time

Finally, during the injection process, the working time of the gas pressure pulse is difficult to precisely control

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