Research On The Electromagnetic Induction Heating System For Tire Vulcanizing Machine

Due to the rapid development of the automotive industry,the tire industry has suffered a certain impact,which is both a challenge and an opportunity for the tire industry.Tires play an important role in the stability and safety of automobiles.The most important part of the tire manufacturing process is vulcanization,which can transform the linear rubber molecules into a three-dimensional network structure under certain temperature and pressure conditions.This part also determines the quality of the tire and all aspects of the tire The performance is good or bad.In the traditional vulcanization method,the pressure and temperature required for tire vulcanization are provided by steam or superheated water(through heat transfer).Most of the traditional vulcanization methods use the method of over vulcanization.Because the use of steam or superheated water for vulcanization will inevitably produce condensate.The generation of condensate affects the uniformity of the overall temperature field,making the temperature difference between the upper and lower ends of the tire vulcanizing machine too large,which also indirectly affects the performance of the wheel,and the energy loss in the way of over vulcanization is also particularly large,and the efficiency is not high.The design and optimization of the electromagnetic induction heating system based on the existing vulcanization equipment are proposed.The traditional superheated water and steam are used as the medium for heating,and the electromagnetic heating system is added to the vulcanization equipment for heating.In the case of retaining the middle capsule structure,the temperature field of the bottom plate and the active mold after induction heating is more uniform and no condensate will be generated,thereby improving the performance of all aspects of the tire and reducing unnecessary waste of energy consumption.At the same time improve production efficiency.The main research work is as follows:(1)Based on the existing steam heating and vulcanization equipment,the model is modeled in the same proportion;the arrangement of the coil is determined,and the induction coil under the heating bottom plate is designed and simulated by Maxwell software,and the coil and heating are grouped to simulate The distribution of the bottom plate eddy current field under the factors of the distance of the bottom plate and the shape of the coil determines that the optimized coil structure is more conducive to the uniform distribution of the temperature field.(2)The indirect coupling method is used to couple the eddy current field obtained in Maxwell with the steady-state temperature field in the workbench,and the distribution of the temperature field on the surface of the heating base plate is simulated;the influence of the frequency and current on the temperature field is analyzed to get the basic law of temperature field affected by these two factors.The orthogonal test method was used to optimize the current,frequency and other factors,and the distribution of the temperature field after the parameter optimization was simulated.Finally,the ferrite was optimized to determine the optimized structure to further improve the uniformity of the temperature field distribution.(3)On the basis of the existing steam heating vulcanization equipment,the active mold is modeled,considering the special structure of the active mold,an electromagnetic induction heating unit method is proposed to heat the active mold.According to the distribution of the induced magnetic field of a single coil unit,several coil units are arranged,and the induced eddy current field of the movable die after the coil design is obtained.The orthogonal experiment method is used to optimize and analyze the selected parameters of the active mode,which improves the uniformity of the active mode temperature field.Calculate the surrounding magnetic field obtained by the active mode induction heating and shield the external magnetic field according to the calculation results to ensure the safety of the staff,improve the efficiency of the vulcanizer,and improve the vulcanization performance.