| 摘要 |
PURPOSE:To obtain resin moldings with strain by a method in which a mechanism to enlage the volume of a cavity during injection for obtaining larger compression allowance is provided, and after the injection of resin, molds are freely clamped or opened under a high pressure. CONSTITUTION:A cavity 7 made up of a fitting plate 4 on the fixed side, a mold plate 5, and a mold plate 6 on the movable side is provided between a fixed side die plate 1 and a movable side die plate 2. Then, a cylinder 9 having a mold-clamping cylinder ram 8 is attached, and a compression allowance setting mechanism is provided between a die bar supporting plate 3 and a movable die plate 2. A key 10 is inserted compression-allowance setting rods 11 and 12, the cylinder ram 8 is retracted to an injection allowable state, and then molten resin is injected from the nozzle 14 of the fixed side die plate 1. Then, compressive operation is made, and when the key 10 transmitting the injection pressure becomes movable, the key 10 is removed and the molds are opened for taking out molding. |
