The Structure Design Analysis And Software Development Of The Tire Segments Mold

The segments mold is a matching equipment for automobile tire production,which has a crucial impact on tire performance.The tire is loaded into the mold,the pattern of the mold cavity is printed on the tire and the vulcanization reaction occurs in each layer.The temperature and stress in the contour profile of the mold are the important factors that affect the quality of the tire.This paper uses ANSYS software for structure design,analysis and optimization of tire mold,with 1188 housing used on 63.5# vulcanizing machine being used for the vulcanized12R22.5 specification tire mold as the initial die structure,carrying out stress analysis,thermal analysis,thermal mechanical coupling on the die structure.Based on the data of the three analysis results,the structure of the initial die is optimized with reference to the existing data on the die structure.Structural optimization has two objectives: one is to improve the temperature distribution of the mold contour and improve the temperature uniformity;the two is to improve the mold stress concentration by adjusting the structure,easing the deformation of mold,improving the quality of the vulcanized tire,so as to improving the tire rubber edge and pattern dislocation problems.Basing on the above die structure and previous works,two improved structures of dies were presented,with stress analysis,thermal analysis and thermal mechanical coupling analysis of the two die structures being carried out.According to the above two optimization objectives,the initial die structure is compared with the two kinds of die structures,respectively.The comparison is based on the result data obtained from the finite element analysis.The analysis shows that the two die structures are superior to the initial die structure to a certain extent under the premise of the proposed optimization objectives.The simulation of die structure in the process of tire vulcanization was carried out in the fifth chapter.In this paper,the vulcanization process of the mold is divided into three steps according to the vulcanization process.The first is the warm mold process,which is the process of mold heating from room temperature to working temperature.In the process of ANSYS,transient thermal analysis used to get the temperature and die time of the mold is about 1.15 hours.The second step is the process of mold filling.The mold is opened,and the mold cavity is exposed to air,which leads to the loss of heat.The process is analyzed by thermal radiation.The result is that the die is reduced from 180.0°C to 146.6°C.The third step is the vulcanization process.The process is the tire heating from the tire to the finished tire.The simulation analysis of the process is transient thermal coupled analysis,and the temperature time curve and stress time curve are obtained.The analysis results can provide the basis for the improvement of tire vulcanization process.We developed two software,the first is the tire mold contour design software,which is mainly used for auxiliary mold structure design,and is written by GUIDE plug-in of MATLAB software.The second,taking the die structure of the fifth chapter as an example,we use the ANSYS_APDL two development language to complete the die structure analysis software,and achieve the thermal mechanical coupling analysis of the mold structure.