| 摘要 |
An injection molding machine comprising a moveable platen (1), a fixed platen, at least two tie bars (3) arranged between the moveable platen and the fixed platen to have the moveable platen move thereon and an open-close mechanism of lock nut provided on the periphery of an end of the moveable platen to engage with each tie bar. The open-close mechanism of lock nut comprises two pairs of lock nuts (21, 22), a clamping unit (2) and a pair of rods (23, 24) for connecting the pair of lock nuts. The clamping unit comprises an execution element (25) and a pair of connecting bars for open-close action (26, 27) symmetrically arranged. A first end of a first connecting bar for open-close action (26) is connected to the second nut (212) of the first pair of lock nuts (21), and a first end of the second connecting bars for open-close action (27) is connected to the first nut (221) of the second pair of lock nuts (22). A second end of the first connecting bar for open-close action (26) is connected to a second end of the second connecting bar for open-close action (27), and the second end of the first connecting bar for open-close action and the second end of the second connecting bar for open-close action (26, 27) are driven by the execution element (25) simultaneously to open or close the first pair of lock nuts and the second pair of lock nuts (21, 22) simultaneously. Production cost and energy consumption may be reduced according to the present invention. |
