Hydraulic control circuit for an injection molding machine...

Details Hydraulic control circuit for an injection molding machine... Hydraulic control circuit for an injection molding machine...

B - Operations, Transporting

29

C

138/73

B29C 45/82 (2006.01)

Patent

CA 1247981

A B S T R A C T A hydraulic control system for simultaneously driving two hydraulic loads of a production machine by means of a variable delivery pump feeding drive fluid to the two loads through separate load lines, in accordance with independently controllable programs of flow rate and pressure, the two load lines being controlled by two proportional P/Q valves, the pump being continuously adjusted for a constant pressure grad- ient in the load line which carries the higher pressure, the other load line having a pressure imbalance compensating de- vice in the form of either a flow rate measuring device, a pressure balancing valve, or a displacement-to-voltage con- verter connected to the associated load.

498793

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