Rubber mixing plays a very important role in the tire manufacturing process, and the rubber mixing effect affects the quality of the finished tire. Numerical simulation methods are often used to investigate the optimal rubber mixing parameters. To solve the problem of rubber mixing numerical simulation calculations in non-isothermal partial filling conditions when the calculation is difficult, this paper is based on the principle of decoupling to design an algorithm to calculate the rubber temperature in the rubber mixing process. The rubber viscosity and shear rate are processed using the Bird–Carreau model, and the rubber temperature and viscosity are decoupled using the Arrhenius-Law model. Define the heat generation rate of rubber based on the rubber viscosity and shear rate obtained from transient numerical simulation, and obtain the temperature value of each rubber unit. Numerical simulation calculations of rubber compounding under non-isothermal partial filling conditions are realized. To verify the feasibility of the algorithm, the designed algorithm is applied to study the effect of rubber mixing machine speed on the rubber mixing effect. Finally, comparing the numerical simulation results with the experimental results, the effectiveness of this algorithm is proven.

混炼胶在轮胎制造过程中起着非常重要的作用，混炼胶效果影响着成品轮胎的质量。数值模拟方法通常用于研究最佳橡胶混炼参数。针对橡胶混炼数值模拟计算在非等温部分填充条件下计算困难的问题，本文基于解耦原理设计了一种计算橡胶混炼过程中橡胶温度的算法。橡胶粘度和剪切速率使用 Bird-Carreau 模型进行处理，橡胶温度和粘度使用阿伦尼乌斯定律模型进行解耦。根据瞬态数值模拟得到的橡胶粘度和剪切速率定义橡胶的生热速率，并获得每个橡胶单元的温度值。实现了非等温部分填充条件下橡胶混炼的数值模拟计算。为了验证算法的可行性，应用所设计的算法研究炼胶机转速对炼胶效果的影响。最后通过数值模拟结果与实验结果的对比，证明了该算法的有效性。