| 摘要 |
PURPOSE:To enable an injection molder to be miniaturized by a constitution wherein an injection cylinder serves also as a mold clamping cylinder so as to generate mold clamping force by utilizing injection pressure. CONSTITUTION:An injection cylinder 22 is formed roughly to the central part of a housing 16. The right portion of the injection cylinder 22 has a diameter larger than that of its left portion. A mold-clamping piston 26 is arranged oppo site to an injection piston 24 in the large diametral right portion. In the above- mentioned constitution, the pressurized oil fed to the injection cylinder 22 presses the injection piston 24 leftwards and at the same time also presses and shifts the mold clamping piston 26 rightwards. At this time, the pressing force of the pressurized oil to press the mold-clamping piston 26 rightwards acts as the clamping force through an auxiliary movable die plate 28 and tie-bars 17 to a movable die plate 38. Because the injection cylinder 22 is also utilized as the mold-clamping cylinder as described above, a large mold clamping force is easily obtained in proportion to the value of the injection pressure.
|
