微齿轮注塑成型正交优化及数值模拟

Injection Molding Micro-gear Orthogonal Optimization and Numerical Simulation

介绍了采用高聚物成型微齿轮的主要成型方法——微注射成型。比较了不同种类的注射原料ABS、聚丙烯(PP)、聚碳酸酯(PC)的成型工艺,并就影响微注射成型中影响微制件质量的主要工艺过程:充模压力、熔体温度、模具温度和充填时间等进行数值模拟研究,采用正交优化方法对成型方案进行优化,获得优化的成型参数。为微齿轮成型模具的结构设计、成型工艺参数的合理化等等提供理论依据。通过对微齿轮成型过程的数值模拟优化,得到微注射成型的模具温度升高、注射压力增大、注射温度升高都会缩短充模时间;结果显示,聚合物材料对微注塑齿轮的适用性依次为:ABS>PP>PC。

Micro-injection molding was employed in the micro polymer gears.The forming processes of different injection materials such as Abs,polypropylene（PP）,polycarbonate（PC）were compared.The main process parameters influencing the micro-parts quality included injection pressure,mold temperature,injection temperature and filling time.Combined the numerical simulation with orthogonal optimization method,the injection forming was optimized to obtain the optimal process parameters,which was useful for the structure design of micro-gear die and process parameters.The simulation results showed that filling time could be shortened with the increase of molding temperature,injection pressure and injection temperature.It also showed that the availability of polymer material on the gear micro-injection was as follows：AbsPPPC.