Design and experiment of a needle-type piezostack-driven jetting dispenser based on lumped parameter method

Abstract

Micro liquid dispensing technology is widely used in the field of electronic packaging. This study presents a lumped parameter model of a needle-type piezostack-driven jetting dispenser, which can produce small high viscosity adhesive droplets with a high driving frequency. After describing the structural components and operating principles of the dispenser, a lumped parameter model for the system is derived by integrating the sub-models of the structural and fluid parts. According to the lumped parameter method, the fluid channels of the dispenser have been divided into several lumps to obtain a more accurate performance. Based on the proposed model, the jetting dispenser is designed and manufactured, and its performance is then evaluated through both computer simulations and experiments. Further experimental studies about its working properties based on the proposed dispenser are carried out. The results are used to guide the design and control works about the proposed dispenser.

Keywords:

• jetting dispenser
• piezostack actuator
• lumped parameter method
• high viscosity

Additional information

Funding

This work is supported by the National Natural Science Fund [grant number 51105116, China]; National High Technology Research and Development Program [grant number 2012AA040504, China]; Special Funds for Independent Innovation of Shandong Province [grant number 2013CXA10021, China].