Patent ID: 6386469
Filing Date: 2002-05-14
Classification: B02C,B26D

Abstract:
Pelletizing device for cutting plastic fibre strands into pellets having a cutting rotor (1) which is rotated by a drive system and cutting blades (3) distributed over a circumference (2) of the rotor, root areas (22) of which blades are arranged in grooves (6) in the rotor body (5), each cutting blade (3) having at each end of a flat side extending to the cutting edge one recess (8, 9) parallel to the cutting edge (7), which recesses are covered by one of the grooves (6) to receive and interact with clamping elements (10) being held in an opposite recess (12) in the rotor body, wherein each clamping element (10) is a slotted clamping sleeve (11) having a cylindrical outer contour which fits within one of the recesses (8, 9) in the cutting blade and one of the opposite recesses (12) each having the same shape as the clamping sleeve, each clamping sleeve (11) having an internal screw thread (13) which extends inwards from the outer edge (14) of the clamping sleeve (11) and merges into a smooth inwardly tapering inner cone (15) in the end region (16) of the clamping sleeve (11), wherein the inner cone (15) of the clamping sleeve (11), by the insertion of a grub screw (17), can be brought into engagement with an attached cone (18), the grub screw (18) in the area of the inner cone (15) of the slotted clamping sleeve (11), widens the latter in the segmental direction with respect to the cutting rotor, towards the recess (8, 9) in the cutting blade (3), so that when the grub screw (17) has been screwed in, the cutting blade (3) is connected to the rotor body (5) in a form-fitting and force-fitting manner by means of the clamping sleeve (11).