TWIN vulcanizing machine is equipped with upper heating plate without retractable ram and is proper to the realization of matrix in natural organic rubber and particularly in silicone rubber. The very strong steel structure of remarkable thickness, the generous dimensions of the heating elements and the big diameter of the pressing screw allow the vulcanisation of rectangular moulds of big sizes or more in the same time. Finely anti-scratch hot-painted, TWIN has a panel board with main backlighted switch, 0-99 mins. digital timer, 2 digital heating regulators for the separately control of each plate, 2 heating checking lights