METAL MOLD FOR GLASS ELEMENT SHAPING

摘要

At an initial stage of commencement of die opening motion, during upward moving of upside core (3) together with upside die plate (1), upside cavity die (2) is urged downward by means of elastic member (10) so as to push the bottom surface of the upside cavity die (2) against the top surface of downside cavity die (6) and to maintain the state of contact therebetween. By the use of a difference between the outer diameter of downside core (5) and the outer diameter of the upside core (3), glass element molding (4) is caused to remain in the downside core (5). Accordingly, unfailing release of the glass element molding (4) from the metal mold and unfailing remaining thereof in the under die at the time of die opening can be realized to thereby enable smooth molding takeout and autodelivery thereof.