Patent ID: 6024479
Filing Date: 2000-02-15
Classification: B29B,B29C

Abstract:
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, anda degassing device on the main extruder (1) for a discharge of a gas stream from the portion of evaporation (14), andwherein 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').