Tool for shearing isobaric adhesive tapes of doors and windows

The utility model discloses a tool for shearing isobaric adhesive tapes of doors and windows. The bottom plate and the sizing part are fixed on the workbench; the cylinder body and the bottom die fixing seat are fixed on the bottom plate, and the bottom die fixing seat is provided with an accommodating groove of the adhesive tape bottom die; an adhesive tape clamping groove is formed in the adhesive tape bottom die, and Y-shaped positioning containing grooves of the three blades are formed in the wall of the adhesive tape clamping groove; the three blades are mounted on the blade mounting clamp to form a Y shape, the V-shaped opening end of the Y shape forms an angle of 90 degrees, and a gap is formed between the V-shaped opening end and the vertical wall; the side of the mounting clamp fixing seat is fixed on a piston rod of the cylinder; the upper end of the blade installation clamp is fixed to the lower end of the installation clamp fixing base, and the three blades are right aligned with the positioning c