Mould closing unit with heat management

Mold closing unit for injection molds on an injection molding machine for processing plastics materials and other plasticizable masses, comprising

• at least one first mold carrier,
• at least one movable mold carrier that is movable relative to the first mold carrier, which together with the first mold carrier defines a mold clamping chamber for receiving an injection mold between the two mold carriers,
• at least one support element for at least one electromechanical closing mechanism for cyclically opening and closing the injection mold while moving the movable mold carrier toward and away from the first mold carrier,
• wherein the closing mechanism is actuated by at least one spindle unit which comprises at least one spindle, at least one spindle nut which cooperates with the spindle and is mounted in a bearing unit, and at least one motor mounted on a bearing element,
• a cooling system with cooling elements for conducting away heat from the spindle unit, wherein the cooling elements pass through at least one of the bearing unit or the bearing element, with a cooling path, in which the at least one spindle and thereafter the at least one spindle nut are arranged,
• wherein the at least one spindle has at least one bore in a core, in which at least one of a coolant or a lubricant is guided via at least one lance into a region of points of contact between the at least one spindle nut and the at least one spindle,
• wherein the cooling path is configured in series connection for cooling the at least one spindle via the at least one lance, then the at least one spindle nut via one of the cooling elements and at last the motor.