随着计算机技术与反应注射成型理论(RIM)的发展，RIM的计算机模拟技术也成为近年来发展很快的前沿研究领域，它综合了高分子流变学、传热学、数值计算方法和计算机图形学等多门学科。通过计算机模拟技术，就可以进行反应注射成型工艺、模具和制品的优化设计，从而节省试验费用，缩短工艺和模具设计周期。 本论文利用MOLDFLOW软件，对某型B超机倾动座成型过程进行了计算机模拟，在实物生产制造前，可以找到模具设计和制品设计及生产工艺参数上的缺陷和不足，大大节省了产品设计开发的时间和费用。另外还详细介绍了真空注模这种RIM成型方法。真空注模成型方法可以和快速成型及硅胶模翻制工艺结合在一起，可快速方便得到制品，且制品质量很好。但这种方法设备投入较大，且由于受到设备尺寸的局限，只能成型小制品。 本课题还利用有限差分方法，编写一个程序，用来模拟反应注射成型制品的固化冷却过程。通过数值模拟计算，可以求出任意时刻制品中各点及平均的温度和固化度。同时，还可以通过温度和固化度的数值模拟来确定最佳生产工艺条件，包括模具温度、催化剂浓度和反应物料温度。模拟结果表明，反应材料温度的提高对体系的最大温度和反应的影响是最大的，其次是模具的温度，最后是催化剂的浓度的变化。高的模具温度虽然可以使反应更快的进行，但也会使体系的最高温度变得好高，这将影响制品的质量；催化剂浓度的变化，对体系的最大温度影响不大，而对反应度的影响是极大的，大的催化剂浓度能大大加快体系的反应速度；不同反应物料温度对体系的最大温度有影响，而对体系固化时间影响不大。高的反应物料温度引起快的反应速度和快的放热，因此对应高的最大温度。

With the computer technique and the theories of RIM developing, the computer aided engineering (CAE) of RIM, namely the technique of computer imitation also becomes to be the front search field, which blends much branch of learning, such as the subjects of high-molecular molding, the subject of transmit heat, the method of number calculation, the subject of computer graph and so on. By using the technique of computer imitation, we can optimize the technology of RIM and the design of the mould, so to save the expense of test, and to shorten the period of designing of molding tooling. This thesis makes use of the MOLDFLOW software to imitate the forming of one instrument of super B, and get the verification by experiments by the technology of under vacuum condition. The RIM technology under vacuum condition can blend the technology of the rapid forming and silicon mold forming together, getting high-quantity product fast and convenient. But the equipments expense of this method is high, and because of the limit of the size of equipments, which only get small size product. This thesis also makes use of the limited cent method to write a program by myself, which is used to imitate solidifying and cooling of the product of RIM. By calculating, we can know that, the density of catalyst, the original temperature of material and molding tool can influence the biggest temperature and the time of solidifying of material, which is more serious to thin wall of ware, because of slow process relate of heat. The original temperature of material influences reaction process obviously. The high original temperature of material causes the quick reaction speed and putting off heat, therefore causes the biggest temperature of material, especially under the case of low temperature of mold. Under the case of high temperature of mold, quick reaction causes lower the biggest temperature of material, which is because the rise of the temperature of material is caused by the high reaction heat, but the heat from the mold wall is small. In the case of the slow reaction ,the rise of the temperature of material includes the heat coming from the mold wall, so there is higher the biggest temperature. Moreover, the minimum reaction degree point is moved towards inside with the rise of the temperature of mold or the reaction speed nearby the wall of the molding tool.