数值模拟方法在橡胶冷流道设计中的应用研究

Numerical Simulation on Design of Rubber Cold Runner

将数值模拟方法与正交试验方法相结合,对橡胶注射模具冷流道浇注系统的温度场进行数值分析和研究。数值计算采用隐式定常求解,用k-ε湍流模型封闭运动方程,近壁区的流动采用标准的壁面函数法,固体壁面用无滑移边界条件,压力-速度耦合用SIMPLE算法。试验设计采用三水平三因子的正交试验法,得出不同水平组合下的温度场分布,导热油油路直径为10 mm、导热油入口温度为95℃、导热油入口流速为3.5 m·s-1时,胶料温度最佳,温度分布均匀。

In this study,the temperature field of cold runner casting system for rubber injection mold was analyzed by combining numerical simulation method and orthogonal experimental test method. Numerical calculation was done by using implicit stationary solution,the k-ε turbulence model was used to close the motion equations,the standard wall function method was applied for the flow flied in near wall region,no slip boundary condition was adapted for solid wall,and SIMPLE algorithm was applied for pressure speed coupling. The experiment was designed using a three-factor and three-level orthogonal experiment design. The factors were hole diameter,inlet temperature and inlet velocity for heat conduction oil. Based on the experimental test results,the temperature field distribution was obtained. It was found that when hole diameter,inlet temperature,inlet flow rate of heat conduction oil were 10 mm,95 ℃,3. 5 m·s-1,respectively, the compound temperature was optimized and temperature field distribution was uniform.