小型异步电动机的铝笼转子采用压铸方法具有生产效率高、劳动强度低、便于实现机械化、自动化等优点。但是,目前转子压铸质量较差,尤其是铝笼内部气孔等缺陷比较严重,因此转子电阻损耗较大,直接影响了电机的效率和转差率。为了提高转子压铸质量,首先必需具有符合转子压铸要求的压铸设备。目前国内多数小电机生产厂的压铸设备是油压机改装的,压射压力低,只具有一级压射或二级压射性能,有的甚至是采用弹簧蓄能,或直接 Small asynchronous motor aluminum cage rotor using die-casting method with high production efficiency, low labor intensity, easy to achieve mechanization, automation and so on. However, the quality of rotor die-casting is poor at present, especially the defects such as the stomata inside the aluminum cage are more serious, so the rotor resistance loss is larger, which directly affects the efficiency and slip of the motor. In order to improve the quality of rotor die-casting, we must first have a die-casting equipment that meets the requirements of rotor die-casting. At present, most of the small motor manufacturers die-casting equipment is modified hydraulic machine, injection pressure is low, with only one injection or two injection properties, and some even use spring storage, or direct