Closing unit for form tools of an injection molding machine

A closing unit (1) for a mold tool (6) of an injection molding machines

• a stationary mold support plate (2),
• a movable mold support plate (3) whose spacing from the stationary mold support plate (2) can be varied by displacement thereof,
• a drive support plate (4) which is connected with the stationary mold support plate by traction links (5),
• wherein an electric motor (18) serves as an actuation drive for the movable mold mounting plate (3),
• whereby the electric motor repositions at least one toggle lever system (7) alternately through a threaded spindle (15) between a kinked position and a stretched position,
• the at least one toggle level system being installed between the drive support plate (4) and the mobile mold mounting plate (3), and
• wherein the mold tool (6) is held under closing stress between the two mold support plates (2 and 3) in the stretched position of the at least one toggle lever system (7),
• characterized in that,
• a liquid-cooled (19) servomotor (18) is provided as the electric motor,
• wherein the electric motor comprises a hollow shaft (17),
• inside of said shaft a threaded spindle (15) can be axially displaced by a nut (16),
• wherein the nut (16) engages at the at least one toggle lever system (7) in a non-rotatable manner thereto.