The traditional mold design and process parameter setting mainly rely on the experience and skills of the designer. The rationality of mold design only depends on repeated mold testing and repair, and the process parameter setting can only be modified by repeated mold testing. It is lack of scientific basis, long production cycle, high cost and difficult to guarantee quality.
By simulating the forming process, the problems in the design can be found before the mold manufacturing, so that the mold design and process parameter setting are based on scientific analysis, which can shorten the production cycle and improve the product quality. With the improvement of product quality requirements, the prediction of forming process has become an indispensable part of design. Therefore, it is of great significance to establish the mathematical model of melt flow and heat transfer in the mold cavity during injection molding, and to use the numerical simulation method to realize the simulation of the molding process.
Because the process parameters of the molding process directly determine the flow state of the melt in the mold cavity, which has the most direct and far-reaching impact on the quality of the products, it is an effective way to improve the quality of plastic products to find the optimal process conditions of the product molding and control the molding process.
This is because, in the molding process, the precise molding machinery, reasonable mold design and excellent material performance can only be reflected under the reasonable setting of molding process. On the other hand, the defects of molding machinery, mold design and material performance can sometimes be made up by the appropriate setting of molding process. It can be seen that injection molding process plays an important role in the quality of products
