The machine applies to vulcanizing various kinds of rubber and plastic model products as well as non-model products. The machine is in frame structure with below pressing form (upwards). Under the working hydraulic pressure, the embolism ascends to make hot plate close for getting pressure, while the embolism descends (namely hot plate turning on) by deadweight of hot plate, platform and embolism to drive working fluid to fuel reserve tank to achieve the aim of descending (namely turning on).