TOOL LOCKING DEVICE WITH TIE RODS, PARTICULARLY FOR PLASTICS INJECTION MOLDING MACHINES

摘要

The tie rods have first ends anchored to a base plate, and a first tool support is movable along the tie rods. A second tool support is mounted on the tie rods adjacent the opposite ends thereof, and a toggle type locking mechanism is connected between the base plate and the first tool support and operable to lock the first tool support in closing relation with the second tool support. Respective hydraulic cushions are provided between the second tool support and the opposite ends of the tie rods, and a hydraulic pressure limiting device is connected to a hydraulic line interconnecting the hydraulic cushions. The hydraulic cushions may be provided by pistons on the opposite ends of the tie rods and engaged in respective cylinders. A safety circuit may be provided, including a pressure controller associated with a common connection line and a switch responsive to the travel position of the movable first tool support.