Patent ID: 7296985
Filing Date: 2007-11-20
Classification: B29B

Abstract:
1. Device for granulating thermoplastic materials with a die plate ( 1 ) and a rotary cutter head ( 11 ), said rotary cutter head ( 11 ) carrying cutter knives ( 10 ) and being positioned in front of said die plate ( 1 ) in a water chamber ( 21 ), said rotary cutter head ( 11 ) being centered by means of a rocker bearing ( 14 , 15 ) and being connected in rotationally fixed manner to an axially displaceable drive shaft ( 12 ) through a torque transmitting element, characterized in that the torque transmitting element is in the form of a tubular slotted spring ( 19 ) surrounding the drive shaft ( 12 ), said slotted spring ( 19 ) connecting the end of the drive shaft ( 12 ) facing the rotary cutter head ( 11 ) to the rotary cutter head ( 11 ) in the peripheral region of the rocker bearing ( 14 , 15 ), said rocker bearing ( 14 , 15 ) being disposed between the end of the drive shaft ( 12 ) and the rotary cutter head ( 11 ) in the radial direction.