Rotary cutter for plastic pulverizer

The utility model relates to a rotary cutter for a plastic pulverizer, comprising a plurality of cutter blocks connected in series. The cutter blocks are composed of cutter bodies and cutter heads. The cutter heads made of high-quality metal material are connected with the cutter bodies via screws. The cutter edges of the cutter heads are parallel to a rotating axial line. The cutter heads of adjacent cutter blocks differ in definite angles in turn on the outer cylindrical surface of the rotary cutter, and three cutting edges forming a step shape approximating to a spiral line. The cutter of the utility model overcomes the disadvantage that a composite inclined cutter has nonuniform stress, large resistance and axial force in the process of cutting, and the rotary cutter for a plastic pulverizer has the advantages of sharp cutting edges, strong capability of crushing thick objects, and the cutter heads can be detached singly for sharpening or replacement after abrasion.