Hydraulic system for molding machine, in particular for press casting machine

Abstract

The invention relates to a hydraulic system. The hydraulic system is used for the forming machine. Die-casting machine, in particular for a die-casting machine, the hydraulic system comprises a pressure medium source; a tank, an injection cylinder and an outflow valve, the injection cylinder is provided with a piston; the first pressure chamber acts in the moving-out direction of the piston rod; wherein a pressure medium can be conveyed from the pressure medium source to the first pressure chamber, The outflow valve has a high-pressure connection and a low-pressure connection that can be connected to the high-pressure connection and is connected by means of the high-pressure connection to an annular second pressure chamber that acts in the direction of displacement of the piston rod of theinjection cylinder, and a fluid path is guided from the low-pressure connection of the outflow valve to the tank.

Description

technical field

[0001] The invention relates to a hydraulic system which is provided for a molding machine, in particular for a die-casting machine, and which comprises a pressure medium source, a tank, an injection cylinder and an outflow valve, the injection cylinder having Piston, piston rod and has a first pressure chamber acting in the direction of removal of the piston rod, pressure medium can be fed from the pressure medium source to the first pressure chamber, the outflow valve has a high pressure connection and can The low-pressure port connected to the high-pressure port and the outflow valve is connected with the high-pressure port to an annular second pressure chamber acting in the direction of movement of the piston rod of the injection cylinder, and the fluid path starts from its low-pressure port Guide to the tank. Background technique

[0002] Such hydraulic systems for die-casting machines are known, for example, from DE 19 49 360 A1, from DE 10 2004 023 15...

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