Research On Structure Optimization And Temperature Control System Of Cold Feed Rubber Extruder Pin Barrel

The rapid development of new energy vehicles has further improved people’s requirements for the quality of rubber tires.Cold feed rubber extruder is an important process equipment in the production of automobile tire,and the rubber extruder of pin barrel is the mainstream production equipment in the extruder market at present because of its good plasticizing performance.In the process of rubber extrusion,temperature is an important factor affecting the quality and extrusion efficiency of rubber material.The cylinder is one of the key components directly affecting the plasticizing performance of rubber material.Improving the structure of the cylinder and temperature control system is of great significance to improve the quality of rubber extrusion.Therefore,this paper takes the pin barrel of cold feeding rubber extruder as the research object,and studies its structure optimization and temperature control system.The main research contents are as follows:(1)Solidworks was used to build a three-dimensional model of pin barrel.On the premise of not affecting the original plasticizing performance and working normally,ANSYS finite element analysis and Fluent heat transfer simulation analysis were used to analyze the influence degree of the barrel structural parameters of each borehole runner structure on the barrel heat transfer performance based on the single factor and orthogonal experimental results.The optimal structure parameter combination is obtained.Then,in view of the shortcomings of the barrel of the drilled runner structure,such as not being able to take away the heat in time and having a large lag,the barrel of the drilled runner structure was improved,and the barrel of the new runner structure and the barrel of the drilled runner structure with the optimal structural parameters were compared and analyzed.The analysis results show that the barrel with the new flow structure takes away more heat in the same time,the heat transfer response speed is faster,and the hysteresis is smaller,which can lay a better foundation for barrel temperature control.(2)Through testing and analyzing the extrusion production data of 120×16D cold-fed rubber extruder with pin barrel,the mathematical model of barrel temperature control system is calculated by step response experiment method,and then the conventional PID,fuzzy control,fuzzy PID and fuzzy neural network PID controller models are designed and built respectively in Matlab\Simulink environment.Finally,the characteristics of each temperature controller are simulated and analyzed.The simulation results show that the fuzzy neural network PID controller designed in this paper has the advantages of fast response,small overshoot and good stability.(3)With STM32 as the core controller,hardware module selection including temperature acquisition,control,communication and other functions was analyzed,and the hardware circuit schematic diagram of each module was drawn on Altium Designer software.The software design of the lower computer of the system is realized through the software programming of each module,and the upper computer uses LABVIEW to monitor the temperature of the cylinder.Finally,the system operation test results show that the system response speed is fast,the overshoot is small,and the temperature fluctuation is kept within±1 ℃ of the target precision value.In summary,compared with the original structure and PID temperature control system of cold-fed rubber extruder pin barrel,the optimized structure and temperature control system of the barrel in this paper has better heat exchange performance and control effect.Therefore,these research results can provide the corresponding design theoretical basis for the designers of cold-fed rubber extruder,and have certain practical application value.