| 摘要 |
PURPOSE:To prevent the occurrence of noize and vibration by making a large diameter perpendicular cylinder which is operated by an upper mold and a small horizontal cylinder which is connected to it, control the travel of a supporting board. CONSTITUTION:A large diameter perpendicular cylinder 25 is operated by an upper mold 4 and a small horizontal cylinder 23, which is connected to the perpendicular cylinder 25, makes a supporting board 22 travel. Therefore, since sufficient reciprocating distance can be provided for the supporting board 22 under the small up-down stroke of the upper mold 4, the occurrence of noize and vibration can be sufficiently prevented, while also preventing the deterioration of the durability of supporting members for the upper mold. |
