Manipulator is the first industrial robot and the first modern robot. In recent years, it has been widely used in the injection molding machine industry. With the rapid development of injection molding machine technology and technology, factories have also become more and more demanding in their degree of automation. Industry experts expect injection robots to become commonplace soon. The mechanical arm will make an important contribution to the automation of injection molding machine industry. At present, domestic machinery is mainly used in machine tool processing, casting and forging, heat treatment, quantity, variety, performance can not meet the needs of industrial development. Therefore, in China, it is mainly to gradually expand the scope of application, focusing on the development of casting, heat treatment of the manipulator, in order to reduce Labor intensity, improve working conditions, in the application of special manipulator, at the same time, the corresponding development of UNIMATE, conditional still want to develop demonstrative type manipulator, computer control manipulator and combination manipulator. Injection molding machine is China's production and application of one of the largest varieties of plastic machinery, but also the main export of China's plastic machinery. But for a long time, China's injection molding machine industry has a serious import and export profit deficit, which is mainly due to the technical content of injection molding machine itself. With the rapid development of automation in China, it is believed that China's injection molding machine industry will soon be upgraded and transformed from the technical level, and the automation of injection molding machine is just around the corner. The mechanical arm has many advantages. Taking the process of taking out the plastic parts of the injection molding machine as an example, the mechanical arm arm can imitate some of the functions of the human arm, an automatic device for grasping, carrying, or operating objects in a fixed program. The use of mechanical arm can reduce the workload of workers, improve labor productivity and workshop automation level. The successful development and application of the injection molding robot has promoted the localization of the automation equipment of the injection molding production line, strengthened the competitiveness of the products of domestic enterprises in the international market, and become the new economic growth point of the auxiliary machinery industry of the injection molding machine, through the continuous development of injection molding manipulator, such as conveyor belt and other automation plant auxiliary equipment development, thus forming a larger industrial chain, promote the development of the entire injection molding industry. With the miniaturization and miniaturization of the manipulator, its application field will break through the traditional mechanical field, and to electronic information, biotechnology, life sciences and aerospace and other high-end industries.