| As a technology that can realize the processes of bonding,fixing,and packaging of target components,fluid dispensing technology is widely used in industries such as microelectronic packaging due to its high precision,high consistency,and miniaturization.Compared with one-component glue,two-component glue has the advantages of faster curing speed and higher bonding strength,and its application is becoming more and more extensive.At present,the two-component glue technology applied to two-component glue has gradually become The main development direction of dispensing technology.To this end,for a two-component glue dispensing industry valve in short supply the needs of the present situation,based on the analysis of the existing working principle and structural characteristics of the valve body,a plunger type double fluid proportion dispensing valve design,the flow pressure loss and the mixing tube to numerical simulation process of a two-component glue mixing,and then made experimental research on the working characteristics of valve.After introducing the classification and characteristics of two-component glue and its mixing method,this paper analyzes the development status of two-component dispensing technology at home and abroad,which provides design ideas and theoretical basis for the design of plunger two-liquid ratio dispensing valve.The 3D modeling of the dispensing valve was carried out by using Autodesk Inventor Professional 2019(AIP2019)modeling software,and the structural characteristics and working principle of the valve were analyzed.Based on the theory of fluid mechanics,the calculation formulas of laminar flow head loss and local head loss in the valve were derived.According to the formula,the pressure loss when the glue flows through the valve body is calculated.Using ANSYS Fluent fluid simulation software,the flow process of glue in the rubber passage of the valve was numerically simulated to explore the influence of glue viscosity and flow velocity on the flow field inside the rubber passage,and the influence law of glue viscosity and flow velocity on the head loss of the rubber passage was obtained,which provided a theoretical basis for the subsequent improvement of the valve structure.Taking the static mixing pipe of the mixing component at the front of the valve as the research object,the flow process and mixing mechanism of the two-component glue in the pipe were analyzed.The mixing coefficient of variation CV was introduced as the evaluation standard of the mixing uniformity of the two-component glue,and the three-dimensional model of the mixing pipe was established Fluid simulation using ANSYS Fluent software in a two-component glue mixed in the static mixing tube process simulation,analyzed the two-component glue viscosity,viscosity,matching proportion and static mixing tube internal mixing unit arranged the influence law of four factors on the mixing effect,for the selection of static mixing tube in the process of production to provide the reference basis.Taking the motion controller named ZMC004 WE as the core,the software named ZDVelop as the development environment and the software named FStudio as the development platform,a control system of the plunger type two-liquid ratio dispensing valve was designed and developed,and part of the software design and human-machine interface debugging were completed.Finally,according to the actual production environment,the experimental platform of the plunger type double-liquid ratio dispensing valve was built,the influence of the motor feed speed and single dispensing time on the valve body performance was explored,and the dispensing process ability of the valve body prototype was analyzed.The experiment shows that under the conditions of dispensing speed of 0.5mm/s and total amount of single glue release of 7g,the related process capacity index of the valve body Cp=4.28,Cpk =3.58,Pp=3.84,Ppk=3.22,which are all greater than the minimum acceptable process capacity value of 1.33 in engineering,indicating that the process capacity of the valve body is basically stable and can meet the actual production demand. |
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