Numerical simulation of aspheric glass lens during the non-isothermal molding process

摘要

Defects such as low productivity and short service life of the mold occur in the isothermal molding process of aspheric lens. On the basis of these problems, a new method of non-isothermal molding was introduced and the fundamental principle of non-isothermal molding was carefully analyzed. Non-isothermal molding is formed at different temperature conditions between glass blank and mold. The deformation flow of the glass is accompanied by heat transfer. Thus, non-isothermal molding of aspheric lens was simulated by the thermo-mechanical coupling 3D finite element method. The internal temperature and stress field of the glass and mold were analyzed. And then the simulation results of isothermal and non-isothermal molding were compared. The results indicated that the non-isothermal molding process was feasible and superior.