Swing arm robots are simple pick and place robotic devices used for sprue removal in plastic injection molding automation. Here are some features of it: First, modularizing design, mold production, high strength aluminum casting, and CNC processing mold. Second, dual up and down frequency multiplier for vertical arm, speedy, durable, and minimum vibration. Third, control system is easy to be operated. Forth, able to connect peripheral equipment for controlling of conveyor, transporter and mould release agent. Fifth, automatic monitoring and display of function faults with recording device, which is easy for maintenance. Last but not least, vacuum device is available for vacuum suction and gripping of products and runners at the same time for multi-cavity mould, single function gripper without vacuum device is only for gripping. Swing arm robots are a nice choice for replace some labor work, cheap and efficient.