阶梯式轮胎直压硫化内模设计

Design of a stepped direct-pressure vulcanization mould

针对轮胎硫化机中心机构金属内模适用范围小的问题,对直压硫化内模进行结构改进,提出阶梯式直压硫化内模,以轴向空间弥补径向空间的不足,进一步增加轮胎直压硫化模具的应用范围。在此基础上针对235/45R18规格的轮胎进行模具设计,首先进行运动仿真检查干涉,确认内模正常运动无干涉;然后对硫化状态下的阶梯式直压硫化内模具进行有限元力学仿真强度校核,校核结果表明各部件应力均低于许用应力,模具整体达到强度要求。

Compared with a capsule vulcanizer,a metal vulcanization mould has many advantages in terms of the central organization of tire vulcanizers.However,the range of applications of conventional direct-pressure vulcanization moulds is small.Therefore,based on previous research,this work aims to improve the structure of a directpressure vulcanization mould,and proposes a stepped direct-pressure vulcanization mould to compensate for the deficiency in the radial space in the axial space,and further increase the application scope of direct-pressure vulcanization moulds for tires.Using the results,a mould for 235 /45R18 tires was designed.Motion simulation check interference was carried out to confirm that the mould suffered no interference during normal motion.In addition,the strength of the stepped direct-pressure vulcanization mould under vulcanization conditions was checked by finite element mechanical simulation.The stress of each component was lower than the allowable stress,and the overall strength of the mould meets the strength requirements.