小型异步电动机的笼型转子一般采用铸铝。转子铸铝工艺有压铸、低压铸铝、离心铸铝等几种。由于转子压铸具有生产效率高、劳动强度低、便于实现机械化、自动化等优点,国外小电机的转子铸铝主要为压铸,国内批量较大的小电机生产厂大多数也都采用压铸。但是,这些厂的压铸设备大都是油压机改装的,压射压力低,只具备一级压射,有的甚至是采用弹簧蓄能,或直接依靠机械传动进行压射。对于铸铝工艺也没有系统地进行研究,工艺参数不尽合理。所 Small asynchronous motor cage rotor commonly used cast aluminum. Rotor cast aluminum die-casting process, low-pressure cast aluminum, aluminum and other centrifugal casting several. As the rotor has high production efficiency, low labor intensity, easy mechanization, automation, etc., the small rotor of foreign small die-casting aluminum, the larger batch of small domestic motor manufacturers are also used die-casting. However, most of the die-casting equipment in these plants is modified by hydraulic machines. The injection pressure is low, only one-stage injection is available, and some even use spring storage, or directly rely on mechanical transmission for injection. For the aluminum casting process has not been systematically studied, the process parameters are not reasonable. The