The invention deploys one or a plurality of single fondant guide boards between the parts of the moulding die clamping pieces longitudinally separated in the middle along the closed direction.

A sealed nozzle system that can move personally in the injection direction is fixedly arranged beside the end face of the fondant guide board, while a fondant compensating system in the fondant guide board is assigned to the sealed nozzle system.

Within the production period, one or a plurality of worm mechanisms make the die casting mechanism kept unchanged at a fixed die casting position; The middle separated and movable moulding die clamping pieces are disassembled by equipped worm mechanism when the sealed nozzle system that can act personally gets back, thereby taking out the molded parts from the die but only needing a quite small force.