Quick clamping and loosening device for die-casting die

The utility model belongs to the technical field of die-casting dies, and particularly relates to a quick clamping and loosening device for a die-casting die, which is characterized in that a piston in a hydraulic oil cylinder barrel is driven by hydraulic oil to move upwards, so that one end, in contact with the piston, of a pressing plate is lifted, the other end of the pressing plate is pressed downwards, and the die is fixed. The die can be fixed only by placing the die at a proper position of the back plate of the die-casting machine and starting the piston in the hydraulic oil cylinder barrel, and the pressing plate can be loosened only by releasing the pressure of the hydraulic oil cylinder barrel in a similar way, so that the mounting and the dismounting are convenient and simple, the labor intensity of workers is greatly reduced, and the production efficiency is improved. And meanwhile, the die mounting and dismounting time is effectively shortened, and the working hours are saved. 本实用新型属于压铸模具技术领域，尤其