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This paper presents a method to calculate the parameters of mold temperature controller based on the fast algorithm of mold water heating with these problems that it is difficult to calculate the parameters of injection mold temperature controller and it can’t be simulated. According to the requirements of fast mold water heating algorithm, firstly, similar transformations are used to construct a similar model to obtain a similar model with the same solution of the fluid-solid coupling mathematical model of mold water heating. The temperature field of the mold after heating is obtained through rapid simulation of the similar model. Secondly, a constrained mold temperature control equation is established, and the iterative method is used to numerically solve the mold temperature equation to obtain the mold temperature controller parameters that meet the heating conditions. An example is given in this paper to show that the calculation method of mold temperature controller parameters presented in this paper has good practical value.

Nondestructive test method for residual stress in a structural member is always an important research subject, as a new technique for measuring residual stress loading measuring method needs to consummate for the convenience of engineering. The paper proves that nondestructive test loading measuring method is effective and accurate when compared with the result from hole-drilling method. Taking the measurement of residual stress of injection-molded part in automotive lamp as example, the residual stresses in the surface of injection-molded parts of automotive lamp measured by the two methods are very close based on the two measuring results. It shows that loading measuring method, a new method is used to measure the residual stress, has enough accuracy and credibility when it is used to measure the residual stress of complicated injection-molded part. It provides a basis for popularization and application of loading measuring method in engineering. The paper discusses the basic principles of loading measuring method and detailed procedure of the measurement of residual stress by loading measuring method; it gives out some advices to reduce the test errors.