PROCESS FOR PRODUCING GLASS SHAPED ARTICLE

摘要

A process for producing a glass shaped article, in which in the production of a glass shaped article according to a droplet molding technique, high configuration precision and thickness precision can simultaneously be ensured. Molten glass droplets are caused to fall into a lower die heated at a given temperature. Using at least one of an upper die and the lower die as a movable die, the movable die is moved in a pressurization direction so as to cause the upper die and the lower die to approach until a final arrival spacing, thereby pressurizing the molten glass droplets having fallen. The pressurization step consists of three substeps, namely, the first pressurization step of moving the movable die so that the spacing between the upper die and the lower die is a given spacing greater than the final arrival spacing and applying pressure, the waiting step of stopping the movement of the movable die or inverting the moving direction thereof and waiting in the state of having a spacing between the upper die and the molten glass droplets and the second pressurization step of thereafter pressurizing the molten glass droplets under a given load for a given period of time.