| 摘要 |
PROBLEM TO BE SOLVED: To finely crack thin and elastic plastic waste such as a pet bottle into pellets having reduced variation of size without making it have the shape of a belt. SOLUTION: Relating to a plastic cracking cutter wherein rotary blades 1 each having plural tooth parts 3 on the outer periphery 2a thereof and disc- like spacers each having an outer peripheral diameter smaller then that of the rotary blade 1 are arranged alternately and opposite to each other, and they are rotated in the directions opposite to each other to crack members to be cracked by the rotary blades 1, on the outer periphery of a disc-like body 2 of the rotary blade 1, outer peripheral blades 6 each whose helical tooth part axis right angle cross section is an triangle and which pass through an apex of the triangle, side blades 7 each consisting of two sides of each triangle of both side surfaces of the tooth part side, and bottom blades 8 each consisting of the outer peripheral edge between the tooth parts. Furthermore, the tooth part is provided with an end part 31 whose width is made narrower than that of the rotary blade. |
