| 摘要 |
PURPOSE:To improve productivity while securing high-precision molding by separating a cooling means from a main body part at a time for heating a die in a method wherein a thermoplastic sheet in the die is heated, cooled and pressure-molded while pressurizing the thermoplastic sheet. CONSTITUTION:The top and bottom forces of a die are equipped with a backing plate 3 used as a member to be pressurized which has a face pressurized by a pressure device, the guide rods 8 positioned between a heating plate 5 and the backing plate 3 and fixed thereto and a cooling plate 4 which is supported by the guide rods and slidable and has a cooling circulation path built-therein. At a time of pressure molding, the top and bottom forces are clamped by motive power of a press device 13 and a resin sheet 12 is loaded with prescribed pressure. The die is closed and simultaneously a heater incorporated in the heating plate 5 is actuated and the die is heated so that the temp. thereof is regulated to a prescribed value. Then this heater is cut and simultaneously an air cylinder 10 is actuated and to cooling plate 4 is brought into press-contact with the heating plate 5 to cool the die. After cooling, this die is opened by a press device 13 to take out a molded article. |
