Device for closing and opening the mould halves of a glass moulding machine

Each mold half is held by means of a mold half holding mechanism which can be driven so as to pivot in a reciprocating manner about a common vertical hinge column by means of a vertical shaft ( 6; 7 ), which is mounted in a rotatable manner in a frame ( 2 ) of the glass forming machine ( 1 ), and by means of first intermediate members. Each shaft ( 6; 7 ) is connected via a lever mechanism ( 8; 9 ) to a common drive shaft which can be pivoted in a reciprocating manner by means of a drive element ( 19 ), which can be moved linearly in a reciprocating manner, of a drive ( 20 ) and by means of second intermediate members ( 18 ). The drive element ( 19 ) can be mounted on a nut ( 26 ) and secured against rotating about a longitudinal axis ( 39 ) of the drive element ( 19 ) by means of a guide device ( 32 ). The nut ( 26 ) is in engagement with a spindle ( 33 ). The spindle ( 33 ) is mounted in an axially fixed, rotatable manner and can be driven rotationally in a reciprocating manner by means of the drive ( 20 ).