Extruder screw drive system comprises motor driven mitre gear transmission unit which drives output shaft and extruder screw

摘要

One or more motors(3) are connected to a mitre gear transmission unit(4). An output shaft(5) from the transmission unit connects with and drives a coaxial extruder screw(6). The motor shaft(7) is at approximately 90[deg] to the driven output shaft(5) and is connected to a spindle(11) carrying a spur gear(8) which engages with a crown wheel(9) in the mitre gear transmission unit(4). The spindle housing(10) is an interchangeable unit. Output drive comprises a shaft(13) for torque transmission and a line shafts(14) for directing axial force into the transmission unit housing(15) via an axial bearing(16). Independent bearings(19,20) carrying the torque shaft in the housing are on the opposite side of the housing to the axial bearing. The axial load drive shaft line(14) comprises a shaft(21) supported against the housing by the axial bearing. An independent claim is included for a method of rotating an extruder screw in which the motor torque is diverted through 60-120[deg] between the drive motor and screw.