BLADE GRANULATOR AND METHOD FOR THE PRODUCTION OF CUT BODIES

1 . Granulating mill for the production of cut pieces from viscous materials, in particular from polymers, with a liquid spray device, comprising at least one rotor ( 5 ) with a 5 plurality of cutting knives ( 1 , 2 ) arranged on the periphery of the rotor ( 5 ) and an extrusion device with die plate ( 3 ) which during the operation of the rotor ( 5 ) is swept by the knives ( 1 , 2 ), characterised in that the gaps between the knives ( 1 , 2 ) are covered at least partially with a spray guard ( 4 ) which is fixed to the rotor ( 5 ).

2 . Granulating mill according to claim 1 , characterised in that the spray device consists of one or more mist nozzles for producing a liquid mist which are aligned in the direction of the die plate ( 3 ).

3 . Granulating mill according to claim 1 , characterised in that the spray device is arranged directed towards the rear side of the knives ( 1 , 2 ).

4 . Granulating mill according to claim 1 , characterised in that the spray device is arranged on the rotor ( 5 ) of the knives.

5 . Granulating mill according to claim 4 , characterised in that the liquid supply of the spray device is arranged on or in the rotor ( 5 ) and rotates with it, and is fed through pipes ( 7 ) into the area of the knives ( 1 , 2 ), wherein the outlet opening ( 8 ) of the liquid supply is arranged in the area of the knives ( 1 , 2 ) and points in the direction of the die plate ( 3 ).

6 . Granulating mill according to claim 1 , characterised in that the knives ( 1 , 2 ) are fixed to the rotor ( 5 ) by springs and are conveyable across the die plate ( 3 ) by springs.

7 . A process for producing cut pieces or granules from viscous material comprising:

providing said viscous material to a granulating mill; and

cutting said viscous material in said granulating mill, said granulating mill comprising:

at least one rotor ( 5 ) having a plurality of cutting knives ( 1 , 2 );

an extrusion device for said viscous material with a die plate ( 3 ) which is swept by the cutting knives during the operation of the rotor ( 5 );

a liquid spray device which axially sprays the knives ( 1 , 2 ) with a liquid;

a spray guard ( 4 ) arranged such that the die plate ( 3 ) is protected against spraying with the liquid from the liquid spray device.

8 . The process according to claim 7 , wherein said viscous material is a thermoplastic polymer, selected from the group consisting of polyamide, polycarbonate, polyvinyl chloride, polyolefin, ABS, SAN resin polyurethane and mixtures thereof.

9 . The process according to claim 8 , wherein said viscous material is a polyamide.

10 . The process according to claim 9 , wherein the polyamide is reinforced with glass fibers.

11 . The process according to claim 10 , wherein the polyamide comprises 15 to 50% glass fibers.

12 . The process according to claim 10 , wherein the polyamide comprises 20 to 30 wt % glass fibers.

13 . The process according to claim 7 , wherein said liquid spray device comprises one or more mist nozzles for producing a liquid mist aligned in the direction of the die plate ( 3 ).

14 . The process according to claim 7 , wherein the spray device is arranged directed towards a rear side of the knives ( 1 , 2 ).

15 . The process according to claim 7 , wherein the liquid spray device is arranged on the rotor ( 5 ).

16 . The process according to claim 7 , wherein the liquid of the spray device is stored in a liquid supply that is arranged on or in the rotor ( 5 ) and rotates with the rotor.

17 . The process according to claim 12 , wherein the liquid is fed through pipes ( 7 ) into the area of the knives ( 1 , 2 ) where an outlet opening ( 8 ) of the liquid supply is arranged in the area of the knives ( 1 , 2 ) and points in the direction of the die plate ( 3 ).

18 . The process according to claim 7 , wherein the knives ( 1 , 2 ) are fixed to the rotor by springs.

19 . The process according to claim 14 , wherein the springs allow the knives to be conveyed across the die plate ( 3 ).