Analysis And Control Of The Temperature Field Of The Jetting Dispenser Based On The GMM

Jet dispensing is a new non-contact dispensing technology, as it is more advantages than traditional contact dispensing technology, and it is considered to be the next generation of mainstream dispensing technology. This paper mainly analyzes and regulates the temperature field of independent dispenser based on GMM, main researches are as follows:Firstly, the finite element model of the dispenser is established, the temperature field of dispenser is simulated and the influence of the thermal contact resistance and the coil incentive on the temperature field of dispenser are investigated, then the thermal deformation based on the temperature field is caculated, and the thermal deformation impact on the GMM rod, needle and other parts is analysised.Secondly, the impact of temperature on the viscosity and performance of the fluid are analysised, and the heating device and temperature control system of the fluid are designed to heat the fluid quickly and control the temperature accurately, accordingly the fluid performance is improved.Thirdly, the temperature field of the dispenser including two situations is tested, one with a fluid heating device and the other without. And the corresponding simulation results respectively are cpmpared, and then the error is analysised and the validity of the model is verified.Fourthly, the coil heating module and the convective heat transfer module are set up. Besides, a structure with thermostatic water chamber is designed to prevent the displacement of GMM rod from been influenced by the thermal deformation. The influence of the thermostatic water chamber is simulated to detect the change of the GMM rod’s magnetic field intensity. All works have laid a fundamental for the optimization of the dispenser jet.