一种注射成型机的安全阀，其由阀体、阀壳、切换轴及阀盖等构件组成，其主要在切换轴顶端设有磁铁，阀盖上方装有磁感开关，当关模指令进行时，切换轴上升，磁感开关动作，送出讯号。当注射成型机控制器侦测到讯号，则继续关模动作；当有异常状况发生时，封闭关模的油路，切换 The safety valve of an injection molding machine is composed of a valve body, a valve housing, a switching shaft and a valve cover. The utility model is mainly provided with a magnet at the top of the switching shaft, and a magnetic switch is arranged above the valve cover. When the switch shaft rises, magnetic switch action, send the signal. When the injection molding machine controller detects the signal, then continue to shut the action; when an exception occurs, closed off the oil, switch