In mold decoration the first mock exam of IMD diaphragm is four cavity high pressure molding

In order to solve the problem of the uniformity of temperature distribution on the diaphragm surface, the zone heating high pressure forming process of IMD diaphragm is proposed Through the first mock exam of IMD diaphragm, the material parameters of polyethylene glycol terephthalate (PET) membrane material at different temperatures were obtained by viscoelastic plastic model. The finite element simulation analysis of the four mode PET diaphragm's zonal heating and high-pressure molding was carried out in ABAQUS software. On this basis, the process experiment was carried out on the high pressure molding machine. The results show that the zonal heating mode under a certain temperature combination can improve the phenomenon of excessive thickness thinning rate in the local area of pet diaphragm and extremely thin thickness in the side wall area of formed diaphragm, and prevent the problems of diaphragm ink being pulled apart and pattern distortion