Automatic generation of feature-based working dimensions of the injection mold cavity

In the current engineering practice, the calculation method based on the average shrinkage rate is generally adopted for the calculation of the working size of the molded parts. This method deals with special cases, such as the shrinkage of materials and the manufacturing error of the mold in the limit state, so the original calculation formula is modified based on the average shrinkage calculation method and considering various factors in the limit state. Due to the complex structure of injection molded parts and the huge number of mold molded parts, the feature modeling technology is adopted, AutoCAD is used as the platform, and the method of combining Geometry/Feature is adopted to establish the characteristic information model of injection molded parts, which realizes the automatic conversion from the size of the injection molded parts to the working size of the molded parts.