Feeding and mixing device for PBT flame-retardant plastic modification

The utility model relates to the technical field of mixing devices, in particular to a feeding and mixing device for PBT (polybutylene terephthalate) flame-retardant plastic modification, which comprises a stirring barrel, an upper cover is fixedly connected to the upper side of the stirring barrel, a motor is fixedly connected to the top surface of the upper cover, and the bottom end of a rotating shaft of the motor extends to the bottom surface of the inner wall of the stirring barrel. A reciprocating groove is formed in the middle of the side face of a rotating shaft of the motor, sliding grooves are formed in the left side and the right side of the inner wall of the stirring barrel, round rods are slidably connected to the side faces of the inner walls of the sliding grooves, square plates are rotatably connected to the upper sides and the lower sides of the round rods, and the side faces of the round rods are slidably connected with the side face of the inner wall of the reciprocating groove. According t