| abstract |
Process for the manufacture of a thermoplastic molding mass by means of an extrusion machine (10), which comprises at least one input zone (20), at least one deep mixing section (30), at least one section of degassing (40) and at least one discharge zone (50), wherein a first water-containing component of the thermoplastic molding compound as well as a second component of the compound are fed into the at least one inlet zone (20). thermoplastic molding, in the at least one bottom mixing section (30), which has a first deep mixing shell (31) and a second deep mixing shell (32), the thermoplastic molding mass is thoroughly mixed , the water contained is evaporated, in the at least one degassing section (40) the water vapor is removed from the thermoplastic molding mass and in the at least one discharge zone (50) the thermoplastic molding mass is discharged , characterized in that at least one of the two mixing housings bottom (31, 32) of the at least one deep mixing section (30) is maintained at a temperature, which is equal to or lower than a temperature of the thermoplastic molding mass within this at least one deep mixing section (30), suppressing an active heating of this at least one thorough mixing casing (31, 32), so that at least this one thoroughly mixing casing (31, 32) is driven adiabatic and because at least A casing of the degassing section (40) is heated by means of a tempering device in such a way that a temperature of the casing of the degassing section (40) is higher than the temperature of at least one mixing casing at bottom (31, 32) and / or because at least one casing of the discharge zone (50) is heated by means of a tempering temperature such that a temperature of the casing of the discharge zone (50) is more higher than the temperature of at least one shell of the mix thoroughly (31, 32). |