Plastic products in the industry, agriculture, defense, electronics, and the aspects of daily life are widely used, and the injection mold is one of rapid industrial development of, and therefore the study of plastic injection molds for understanding the production process of great significance . Plastic injection mold plastic products mainly used in hot forming, has been successfully used in the thermosetting plastic molding plastic products, plastic products it is very important production process equipment. Injection Mold for the basic components are: set-mode institutions, dynamic institutions, casting systems, device-oriented, top-out body, core body cooling and heating equipment, exhaust systems. Automotive air-conditioning control in accordance with the structure of plaque, the use of oblique guide the design of column core-pulling mechanism for release. The use of convex molding plastic parts, molding die clever combination of the side core pulling solve the problem. This design, a detailed calculation process, a wealth of illustrations, with the aid of diagrams, so that readers understand more easily the design process.