| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold clamping device equipped with a sub-tank and having no necessity for providing an oil supply means to the sub-tank. SOLUTION: An oil chamber 29 and the sub-tank 16 are connected by the second oil passage 34 shown by a thick line in Fig. and an inexpensive direction changeover valve 22 is provided to the second oil passage 34. When the oil of the sub-tank is returned to the main tank at the time of pressure release or low speed mold opening, the oil of the sub-tank is gradually reduced. In this invention, the oil of the oil chamber is returned to the sub-tank without being returned to the main tank at the time of mold opening. As a result, the troublesome falling of the oil surface in the sub-tank can be prevented and it is unnecessary to provide the oil supply means to the sub-tank and the mold damping device can be simplified. COPYRIGHT: (C)2006,JPO&NCIPI
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