During the tire vulcanization process, steam needs to be introduced into the upper and lower hot plates of the vulcanizer, the mold sleeve steam chamber of the active mold, and the capsule of the central mechanism to heat and vulcanize the tire blank. During the vulcanization process, the upper and lower temperatures of the cavity surface where the mold parts contact the tire blank are often uneven, which affects the vulcanization quality of the tire.
The finite element heat transfer analysis module is now used to analyze the distribution of the mold temperature field during tire vulcanization, and the mold structure is optimized based on the analysis results to improve the heat transfer efficiency of the mold during use and the uniformity of the mold's heating. The application of finite element analysis technology in tire molds can make the optimization design of the mold more intuitive and controllable, and provide guarantees for the improvement of tire vulcanization quality and vulcanization efficiency.
The optimization results of the mold structure are as follows: the contact area between the mold sleeve slide and the slider is increased by 15%, which improves the efficiency of heat transfer from the mold sleeve steam chamber to the pattern block; the contact area between the base slide and the slider is increased by 10%, which improves the efficiency of heat transfer from the lower hot plate to the pattern block; the mold sleeve and the base structure are optimized, and the gap between the mold sleeve and the base is reduced, thereby reducing the heat convection and heat radiation between the mold and the external environment; the mold sleeve structure is improved, the mold sleeve steam chamber volume is increased, and the mold sleeve steam chamber is moved downward, thereby increasing the heat source energy and shortening the heat transfer route.
By increasing the mold sleeve steam chamber volume, moving the mold sleeve steam chamber position downward, and reducing the gap between the mold sleeve and the base, the temperature difference at each position of the mold pattern block cavity surface can be reduced to 26.7% of the original, and the temperature difference can be controlled within 1.6℃; at the same time, the minimum temperature of the pattern block cavity surface is increased by 7.1℃, and the maximum temperature is increased by 2.2℃, so that the temperature of the cavity surface where the mold parts are in direct contact with the tire blank is more uniform, which is helpful to improve the tire vulcanization efficiency, improve the heat utilization rate and improve the tire vulcanization quality.
