Swing robot arms are applicable to all types of horizontal injection machine of 50~250T for take-out products and sprues. The dedicated plastic injection auxiliary equipments are involved in the whole module production. Swing robots arms have ranges of model RX650V and RX550V, with two types of arms, single stage and telescopic type. The single function is to clamp products, and the full function is to take-out products and sprues. After installed this swing arm robot, the productivity will be increased 10~30%, reduce defective rate, ensure safety of operators, reduce manpower and accurately control the output to reduce waste. It meets high accuracy standards required by computer numerical control system, making the whole body steady even when it is subjected to high speed movement. Besides, its manual control is accessible with multiple languages and supports extension input and output simultaneously, greatly enhancing the automation. For the swing-arm robot, self-diagnostic system can constantly monitor input and output status, and can record the recent errors for maintainers' reference. Air pressure is automatically inspected, and if unsafe operations are conducted, the warning alarm will ring. Applicable to all types of products take out.