| 摘要 |
This extrusion press device is provided with an end platen, dies, a container, and a container cylinder that causes the container to advance/retreat. A stem for pressing a billet in the container engages a main cylinder provided to the tip end and is provided in a manner so as to be able to slide forwards and backwards. Provided are: a plurality of hydraulic valves that supply, to the container cylinder, pressure oil within the main cylinder operating before the step for pressing a billet and the container moving to retreat during the discharge of compressed air within the cylinder after upsetting the billet; and a hydraulic valve that discharges the pressure oil within the main cylinder to a tank. The hydraulic valves are connected by means of hydraulic tubing, and the main cylinder and the container cylinder can interconnect. |
