不是把熔化的金属浇注到铸型中,而是相反把铸型浸入到熔化的金属液中。对于发动机和其他往复运动的机械的铸铁活塞环可由两种不同的方法生产。一种称为“筒形铸造”,其方法就是在静态下铸造,或者是离心铸造。在镗内孔和车外园后,逐个将活塞环切下,再继续加工。另一种方法是每个毛坯单独铸造,在加工前先对其端面进行研磨。后一种类型的铸造方法称 Rather than pouring the molten metal into the mold, the mold is instead dipped into the molten metal. For engine and other reciprocating mechanical cast iron piston rings can be produced by two different methods. One is called “cylindrical casting”, the method is to cast in static state, or centrifugal casting. After boring the hole and the car outside the park, the piston ring one by one cut, and then continue processing. Another method is to cast each blank separately and grind its end face before machining. The latter type of casting method is called