Closing device in a plastic injection molding machine

Closing device on a mould closing unit of a plastic injection molding machine for processing plastics materials and other plasticizable substances, the closing device comprising:

• at least one hydraulic pressure cylinder unit for building up a closing pressure onto an injection mould accommodated in a mould clamping area between a movable mould carrier and a stationary mould carrier,
• a pressure piston disposed in the at least one pressure cylinder unit, and comprising a piston rod disposed along a central axis of the at least one pressure cylinder unit, said pressure piston separating a high pressure chamber of the at least one pressure cylinder unit from a low pressure chamber of the at least one pressure cylinder unit wherein the high pressure chamber is arranged between the pressure piston and the movable mould carrier,
• a hydraulic drive cylinder associated with the at least one pressure cylinder unit for closing the injection mould and disposed concentrically relative to said central axis, wherein a cylinder of the hydraulic drive cylinder is formed by the pressure piston of the at least one pressure cylinder unit,
• a supporting element for supporting the at least one pressure cylinder unit, wherein at least one cylinder of the mould closing unit is fixedly connected to the supporting element on a side remote from the mould clamping area,
• wherein the supporting element and the at least one cylinder of the mould closing unit are one piece, and wherein the supporting element is connected to the at least one cylinder of the mould closing unit.