Manufacturing equipment for optical elements resin molded article, and method of manufacturing an optical element for resin molded article

摘要

The manufacturing apparatus is formed by injecting a molten resin into the cavity, the optical element for the resin molded article having a hollow portion therein, by injecting a pressurized fluid into the molten resin is injected into the cavity The mold internal pressure due to a a pressurized fluid injection means for forming a hollow portion, and a biasing means for biasing in the same direction as the mold clamping direction moving parts, injecting pressurized fluid into the cavity The increase, is moved in the direction opposite to the mold clamping direction against the biasing force of the biasing means moving parts with respect to the second mold or first mold, the mold pressure reduction due to discharge of pressurized fluid, it is configured to move in the same direction as the mold clamping direction by a biasing force of moving parts with respect to the second die first or flats.