Battenfeld Extrusionstechnik Gmbh

Heinrich Schafer

A drive for a two-worm extruder has a housing, an electric motor secured to the housing and having a motor output rotatable about a motor axis therein, and a planetary gear transmission in the housing including a sun gear, a ring gear coaxially surrounding the sun gear, and a driven planet gear in mesh between the sun and ring gear. A first output shaft extends axially through the planetary transmission within the ring gear and has an outer end adapted to be secured to one of the worms of the extruder. A second output shaft carried on the sun gear has an outer end adjacent that of the first output shaft and is adapted to be secured to the other worm of the extruder. A force-splitter includes a continuous-mesh gear train connected to the first shaft, to the planet gear, and to the motor output for driving the first shaft and the planet gear from the motor output. At least two further idling planet gears are journaled in the housing and each in mesh between the sun gear and the ring gear. The planet gears are angularly equispaced about the sun gear.

Drive for two-worm extruder

A drive for an extruder worm centered on an axis has a substantially closed housing axially juxtaposed with the worm, an input shaft extending along and rotatable in the housing about the axis, exposed axially at an input side of the housing, and adapted to be coupled to a drive motor, and an output shaft rotatable in the housing about the axis, exposed at an input side of the housing, and adapted to be coupled directly to the worm. An axial-thrust bearing is braced between the output shaft and the housing. A planetary transmission centered on the axis between the input and output shafts in the housing has a sun gear rotationally coupled to the input shaft, a ring gear spaced radially outward from the sun gear, a plurality of planet gears meshing with the sun and ring gears, and a planet carrier carrying the planet gears and rotationally fixed to the output shaft. The shafts, sun gear, and carrier are formed at the axis with coaxial axially throughgoing passages. A tube having an output end fixed at the passage of the planet carrier extends along the axis with radial play through the passage of the sun gear and at least partially through the passage of the input shaft and has an input end in the input shaft. A bearing supports the input end of the tube in the input-shaft passage and a seal is provided between the input end of the tube and the input-shaft passage.

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Rosdorf, Germany

Heinrich Schafer