MOLD APPARATUS FOR MOLDING DISK-SHAPED RECORDING MEDIUM BOARD AND METHOD FOR MOLDING DISK-SHAPED RECORDING MEDIUM BOARD BY USING THE APPARATUS

摘要

PROBLEM TO BE SOLVED: To improve productivity and to improve transferring properties of an uneven pattern formed on a stamper by controlling the temp. by the first temp. controlling means by interlocking the first circuit for temp. conditioning with the molding cycle of a disk-shaped recording medium board. ;SOLUTION: A hot water for temp. conditioning is circulated and fed from the first temp. controlling machine 31 to the first circuits 21A and 21B for temp. conditioning by actuating a valve mechanism 29 to elevate the temp. of movable mold 11 and 12 to a high temp., condition. By arranging respectively the first circuits 21A and 21B for temp. conditioning so as to bring them closely to the cavity constituting parts of fixed and movable molds 11 and 12, the cavities are efficiently heated to a temp. being lower than the glass transition temp. and where the fluidity of a material resin can be sufficiently held. Therefore, as the material resin holds sufficient fluidity in the cavities held at a set temp., the resin is precisely filled into a fine uneven pattern formed on the main face of a stamper. It is possible thereby to form a board on which the uneven pattern formed on the stamper is precisely transferred.;COPYRIGHT: (C)1997,JPO