Patent ID: 7874823
Filing Date: 2011-01-25
Classification: B29B,B29C,B29K

Abstract:
1. Device for producing pellets from a plastic melt by extrusion, comprising a perforated plate ( 1 ) from which the plastic melt is extruded at a pressure above the ambient pressure; a process chamber ( 2 ) into which the plastic melt is extruded; a chopping device ( 3 ) for chopping strands of the plastic melt extruded from the perforated plate into individual granules, the process chamber ( 2 ) being filled with a process fluid ( 4 ); and a pumping device ( 5 ) which supplies the process fluid ( 4 ) to the process chamber ( 2 ) at a pressure above the ambient pressure, the pressure of the process fluid ( 4 ) with the therein contained granules being reduced downstream of the process chamber ( 2 ), characterized in that an energy converter ( 6 ) is provided downstream of the process chamber ( 2 ), wherein said energy converter ( 6 ) extracts at least some of the pressure energy from the process fluid ( 4 ) with the therein contained granules, reduces the pressure of the process fluid ( 4 ) with the therein contained granules and converts at least some of the extracted energy into a reusable form of energy.