【摘要】 以流体力学和热力学理论为基础 ,建立了充模流动过程的控制方程、初始条件和边界条件 ,并以支持块的充模流动为例 ,采用大型通用有限元软件ANSYS进行了计算机模拟 ,着重研究了浇口位置和浇口尺寸大小对压力场 ,温度场的影响 ,同时结合实验分析了转角处缺陷产生的机理。模拟结果表明 :当采用尺寸大小为 4mm的中间浇口进行注射时 ,可以得到良好的支持块预成形坯 ,与实验结果一致。更多还原

【Abstract】 The control equations, initial and boundary conditions for the die filling process of metal injection molding (MIM) were proposed on the basis of hydromechanics and thermodynamics. With ANSYS software, the die filling process of a complicated part was simulated. And the influence of position and dimension of the gate on pressure and temperature fields were studied. The cause for some defects appearing on the corners were analyzed based on the simulation results. The simulation results show that good green compacts of backup block could be made when the injecting gate is set at the middle position with dimension of 4mm, which was proved by the experiments.更多还原