Cutting mill for the comminution of synthetic material bodies such as runners, injection moulding parts, blown moulding parts and the like

Claim 1

A cutting mill for the comminution of synthetic material bodies such as runners, injection moulding parts, blown moulding parts and the like comprising: a housing; a cylindrical rotor mounted for rotation in the housing; a plurality of mutually spaced cutting element groups arranged on the periphery of said rotor said cutting element groups comprising knives having knife edges substantially parallel with the axis of the rotor; at least one stationary blade, having a cutting edge substantially parallel with the axis of the rotor, and provided in the housing for cooperation with the knives of the cutting element groups; a sieve for filtering of the comminuted material extending over a part of the periphery of the rotor; means for gripping and precomminution of the material bodies before the stationary blade in an entry direction, said means including a plurality of guide plates, each guide plate having a narrow, generally curved lower input edge, each of the lower input edges extending from an area in proximity to the cutting edge of the stationary blade a substantialy distance along the periphery of the rotor and outside a peripheral path defined by the knife edges of the cutting elements of the rotor, the lower input edges being generally arcuately disposed with respect to the path defined by the knife edges of the cutting elements of the rotor, the guide plates being disposed substantially orthogonally to the knife edges and the axis of the rotor; and drive means for driving the rotor with a rotational speed of below 500 R.P.M.