Research On Process Parameters And Intelligent Control Of Microcellular Injection Molding System

Microcellular plastics are highly valued for their excellent performance and low costing.Meanwhile,the microcellular injection molding process with supercritical fluid as the physical foaming agent has been widely used.With faster industrial development and higher product requirements,the improvement of is still inescapable and endless.This subject explored the effects of multiple process parameters in SCF microcellular injection by using analysis and experiments.On this basis,a new type of intelligent control platform has been designed and constructed.In this paper,the characteristics of microcellular gas injection system are analyzed firstly,and the formation mechanism of the initial gas surge is obtained by combining the experimental phenomena:the gas injection residue formed by supplementing the pipeline gap,and the gas surge is formed due to the limiting blind zone.Based on this,a measurement scheme for the gas surge quantity based on Lab VIEW was proposed.The key factors affecting the amount of gas surge was further explored,and it can be concluded that the gaps in the pipeline and the injection pressure has significant effects on the amount of gas surge.Through the comprehensive analysis,solutions to reduce the influence of gas surge from the aspects of experimental equipment and process adjustment are given.In order to explore the relevant parameters of the microcellular injection molding process,a large number of comparative experiments and analysis were carried out to analyze the overall adjustable range of parameters such as length of storage,injection pressure,and melt back pressure.Meanwhile,the effects of the initial gas surge,total gas injection and product weight loss were analyzed,and related mathematical models were constructed.After that,the significance of the process parameters was determined by using software.Finally,the optimization process is carried out to obtain an optimized combination of process parameters,which is used to guide actual production.As for the effects of mold temperature on microcellular injection molding products,a model was built and simulated by software.Then the mold temperature control system was set up,and the control experiment observations and comparisons were designed to investigate the characterization of the cell morphology,mechanical properties and surface quality of the product at different mold temperatures.This paper took example by the control principle of existing microcellular injection molding system,and combined with the process parameter model to propose a new control scheme.On this condition,the hardware platform was configured and the software program was compiled,as well as the interactive interface was designed.After all these works,the intelligent control system was build,and the ultimate optimization of microcellular injection molding’s advanced control was able to realize.