LITOSTROJ RAVNE LTD. Innovations, experience, tradition and power integrated in our products – a perfect combination to customise your reliable production process.
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Koroška cesta 14, 2390 Ravne na Koroškem, Slovenia
Litostroj Ravne Ltd: Mechanical and hydraulic presses and press line equipment.
Push & pull system
Push & pull system is an automated system for quick die (tool) changing. It is used for quick die changing in the press. Operating is performed by control panel that is set on the side of the device. Automatic and manual die change is possible. Push&pull die changing system is optimized by using lifting bars. The unit itself can be consisted out of car with drive, die plate, push and pull unit and lifting table. One of the possible versions of quick die (tool) changing systems is also a platform that can be adjusted and included for specific working area. These platforms are usually custom made.
QUICK DIE (TOOL) CHANGING PROCEDURE:
Die is mounted on one of the die plate which is positioned on the die cart, and protected with the hydraulic safety pins from miss-alignment. When the die in the press is completely unclamped and die clamps safely removed out of die space the cycle for die change can start.
Die moving cylinders extract so far that the hook mounted on the die plate is cached, than lifting bars in the press are charged to lift the die (tool). Die moving cylinders are retracted and the die is pulled onto the die cart till the hook release position. This release is done with the cylinders on carts. In the same time safety pins will also be lifted. The piston of cylinder will be retracted completely to allow die carts movement. After new position of die cart is reached and die cart is fixed on that position with die cart fixation cylinder than the die plate with the new die is pushed into the press. First hook lifter and safety pins cylinders are retracted. Die moving cylinder pushes the die down the die cart over the support consoles and die lifters into the press.
When end position is reached die lifters are lowered and hook lifter cylinder is released while die moving cylinder piston is returning to home position.
