Blade mill for grinding plastic material

Details Blade mill for grinding plastic material Blade mill for grinding plastic material

2006-04-04

2006-04-04

Rosenbaum, Mark (Department: 3725)

Solid material comminution or disintegration

Apparatus

With separation or classification of material

C241S224000, C241S242000, C241S285300

Reexamination Certificate

active

07021576

ABSTRACT:
The invention describes a blade mill for grinding plastic material with a rotor which is driven in rotation inside a grinding chamber and has a plurality of radially outwards-pointing cutter blades distributed around its circumference and a plurality of stationary, radially inwards-pointing stator blades projecting into the grinding chamber and forming a blade gap with the cutter blades, wherein cutting spaces widening radially outwards in a crescent shape and located radially outside the turning circle of the rotating cutter blades are located ahead of the stator blades in the direction of rotation of the rotor. To prevent the plastic material which is to be ground from backing up in the cutting spaces and from being crushed against the wall of the screen baskets, the invention provides that the motion path of the rotor blades extend eccentrically with respect to the axis defined by the screen baskets. Relaxation spaces in which the plastic material is accommodated and which extend over a large rotational angle of the rotor blades are thereby formed in the gap between the wall of the screen baskets and the orbital path of the rotor blades. This allows the driving power of the drive motor to be significantly reduced for a given cutting performance.

REFERENCES:
patent: 1721183 (1929-07-01), McKain
patent: 4151960 (1979-05-01), Peterson, Jr.
patent: 4351488 (1982-09-01), Hess
patent: 4883418 (1989-11-01), Hehl
patent: 5197683 (1993-03-01), Cravero et al.
patent: 6290154 (2001-09-01), Yoshida et al.
patent: 0 266 584 (1989-11-01), None
patent: 2 124 512 (1984-02-01), None
patent: WO 88/08751 (1988-11-01), None

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