| 摘要 |
<p>This invention relates to an injection unit for die-casting machines, which includes: an injection piston (11) driven and movable in a cylinder (12); a first gas accumulator (13) which connects to a reserve tank for gaseous fluids (16) on one side and on the other side, to said cylinder (12), through a pump and valvular means (17,19) to operate the slow and rapid feed motion of the injection piston (11); and a second gas accumulator (20) connected to a multiplier cylinder (14) on one side and on the other side to a pump with adjustable force valves (23,24) to operate a final compression stage with the use of the injection piston (11). <IMAGE></p> |
