Injector for component mixing and medical adhesive spraying device

The utility model relates to an injector for component mixing and a medical adhesive spraying device. The injector for component mixing comprises a charging barrel, a piston piece and an operating rod assembly, the piston piece is arranged in the charging barrel and can slide along the inner wall of the charging barrel in a sealed mode, and the operating rod assembly comprises a piston part and an operating rod which is connected with the piston part and extends out of the charging barrel. The piston part divides the space of the charging barrel into a first storage chamber between the piston part and the piston part and a second storage chamber between the piston part and a liquid outlet of the charging barrel; the piston piece is provided with a first valve which can be opened only when the piston part moves towards one side of the liquid outlet, and the sliding resistance of the piston piece is larger than the threshold value of force needed for opening the first valve. In the using process, the piston par