Patent ID: RE44826

Claim:
A screw extruder mechanism for processing strongly outgassing materials, comprising: a main extruder ( 1 ) with screws ( 2 , 3 ) for proper material processing, with a conveying direction (F) and with a portion of evaporation, a material feed device ( 4 ) at the main extruder ( 1 ) for a supply of material to be processed, a material discharge device ( 5 ) at an end of the main extruder, and a degassing device on the main extruder ( 1 ) for a discharge of a gas stream from the portion of evaporation ( 14 ), and wherein for the gas stream to branch into at least three separate streams ( 19 , 20 , 21 ) in a closed portion of the main extruder ( 1 ), the degassing device comprises at least a first degassing port ( 13 , 13 ′) disposed upstream or downstream of the portion of evaporation ( 14 ) and at least two degassing elements ( 7 , 8 ; 7 ′, 8 ′) opposed to each other radially in relation to the main extruder ( 1 ) and extending from opposite sides of the main extruder, said degassing elements being disposed between the portion of evaporation ( 14 ) and the at least one first degassing port ( 13 , 13 ′).