Selective induction heating to eliminate the fundamental defects of thin-walled moldings used in electrical industry

In the study, a new technology of selective induction heating of injection mold based on the introduction of temperature gradient in the area of one cavity is presented. Only those surfaces of the mold were subjected to heating that were responsible for creation of defects. With use of the ANSYS program the theoretical model and the simulations of induction heating of separated forming surface were developed. On the basis of simulation tests the mold was designed and created to produce the experimental molding part with the wall thickness of 0.4 mm. There were made two production series: in the conventional technology and with support of selective induction heating of the selected forming parts. The application of induction heating technology allowed to entirely eliminate the defects appeared during the production. The results showed that the shape and the localization of the induction coil have great influence on the time of heating. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44992.