| 摘要 |
PURPOSE: To provide a gas suction type mold structure for an information- recording substrate and a molding method thereof which can form a molded substrate with high precision, provides long service life of mold, can be small in size, and can reduce an initial cost and running costs. CONSTITUTION: A gas suction type mold comprises a fixed unit 2 to be fixed to an injection molding machine and a fixed platen, a movable unit 3 to be movably fixed to a moving mechanism and a movable platen, and a control device for controlling a vacuum device, the molding machine, and a degassing mechanism. At each of a floating punch, a cut punch, and an ejector pin of the movable unit 3, a gas freeing means is formed respectively, and a space of 0.1mm or more is formed at an engaging part of a mold main body 17 and the floating punch. First and second sucking openings 18 and 20 in the mold main body 17 are connected to the vacuum device through first and second gas sucking pipes 16, 19 and first and second solenoid valves. Thus, gases generated during molding are discharged assuredly to the outside of the mold. |
