Abstract
In this paper ,it is divided into two parts.The first part is about the design of the structure of mold .It is including the working theory and application of a plastic injection mold,the design princible, and the introducing the desing of mold,the selecting of plastic injection mold machine,and the pour syetem injection mold.
Key Words:CAD/CAM, Plastic, Plastic injection mold , Plastic injection mold machine.